HomeMy WebLinkAbout160-98 RESOLUTIONRESOLUTION Nal 6 0- 9 8
A RESOLUTION APPROVING A CONTRACT AMENDMENT
WITH GREEN -ANDERSON ENGINEERS IN THE AMOUNT
NOT TO EXCEED $25,029 FOR ADDITIONAL SERVICES DUE
TO CONSTRUCTION COSTS FOR THE HVAC RENOVATION
OF THE CITY ADMINISTRATION BUILDING.
BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF FAYETTEVILLE,
ARKANSAS:
Section 1 That the City Council hereby approves a contract amendment with Green -
Anderson Engineers in the amount not to exceed $25,029 for additional services due to construction
costs for the HVAC renovation of the city administration building; and authorizes the Mayor and
City Clerk to execute said contract. A copy of the contract amendment is attached hereto marked
Exhibit "A" and made a part hereof.
-PASSED AND APPROVED this day of December , 1998.
AYEr1.,Nr
i
yr`�,
ATTEST:
By
Heather Woodruff, City Clerk
APPROVED:
By
red Hanna, Mayor
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EXHIBIT A
AMENDMENT TO THE
AGREEMENT WITH Green -Anderson Eng. Inc.
AMENDMENT ,1_
This is an amendment to the Agreement for Engineering Services
executed on the 6th day of January 1998 between the City of
Fayetteville, Arkansas and Green -Anderson Eng. Inc.
Additional services required due to increase in construction costs.
Work involved is more extensive than orginally planned.
The charge for the additional services shall not exceed
$25,029.00.
CITY OF FAYETTEVILLE:
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PROJECT MANUAL
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
Green
Anderson
ENGINEERS, Inc.
2233 N. Green Acres Road
Fayetteville, Ar 72703
Phone- 501-4424682
Fax - 501-442-0413
alGreen
Anderson
ENGINEERS, Inc.
2233 N Green Aces Rd. Fayetteville, Arkansas 72703, Phone (501)442-4682 / FAX: (501)442-0413
MECHANICAL & ELECTRICAL
Addendum No.1
PROJECT: Fayetteville City Administration HVAC Renovation
PROJ # : 98013
DATE: Sept. 21, 1998
The following addenda and attached schedules as referenced herein shall become a part of the contract
documents dated September 9, 1998, and entitled HVAC Renovation Administration Building, City of
Fayetteville.
CHANGES TO SPECIFICATIONS
1. REFER TO GENERAL REQUIREMENTS SECTION 01010
1.1 In Advertisement for Bids on page 01010-1, change the Bid Date from September 23, 1998, to
OtLi September 30, 1998. Change the Room Number for receipt of bids from Room 326 to Room 306 in
the City Administration Building. The Bid Time of 2:00 PM local time will remain.
1.2 In last paragraph, change to read " No bid may be withdrawn after the scheduled closing time for at
least sixty (60) days. The City reserves the right to waive any formalities and to reject any and all
bids."
2. REFER TO SECTION 01100 — BID FORM
.1 In last paragraph on Sheet 01100-1, change 150 calendar days to 210 calendar days to
(9�� substantially complete work from Notice to Proceed.
3. REFER TO SECTION 01400 - SUPPLEMENTARY GENERAL CONDITIONS
3.1 On page 01400-6 in paragraph part 5.0, change the substantial completion time to Two Hundred
SA' Ten (210) calendar days from receipt of Notice to Proceed.
3 2 On Sheet 01400-6 in paragraph part 6.0, add the following, " The contractor should plan his work
t) ` so that the change ver from the existing system to new system will be least disruptive to the
Owner's operation. This may be best accomplished by performing changeover during the milder
season in the spring so that only cooling will be required for both systems. That will allow the
existing condenser water loop to be used for both systems without the requirement for
simultaneous heating from the new boiler loop."
4. REFER TO SECTION 15949 - BUILDING AUTOMATION AND AUTOMATIC TEMPERATURE
SYSTEM
4.1 In paragraph 2.03 for clarification, One complete PC based work station shall be provided in the
VV�n ground floor mechanical room where labeled
f�oit\Sv " BAS" this work station shall include all hardware and software for a complete work station as
l specified. In addition, provide a complete system software package including installation for one of
Owner fumished PC station at a remote location and provide all necessary set up programs etc
including modern connection.
II. CHANGES TO DRAWINGS
A. MECHANICAL
1. REFER TO SHEET M1
1.1 In Demolition Note #4, only the ceiling tile and grid damaged by the contractor during his
installation will be required to be replaced. Any existing damaged or discolored tile and grid will be
replaced by the Owner.
1.2 On Ground Floor Demolition Plan, remove console heat pump unit in room B03.
2. REFER TO SHEET M2
2.1 Above the third floor ceiling contractor shall remove several approximately 4' x 4' section of the
visqueen/insulation system to allow air movement between ceiling cavity and attic space
throughout the third floor. This can best be accomplished by making these openings above each of
the new mixing box locations. The Owner will seal the existing attic vents.
3. REFER TO SHEET M3
3.1 Coordinate the removal and installation of roof -mounted equipment with the Owner and the
Owner's roofing contractor. The Owner will re -roof with the addition of 4" insulation above the roof
deck. Owner will also seal the existing attic vents around the perimeter walls.
4. REFER TO SHEET M4
4.1 Delete Mechanical Notes 11, 12, 14 and 16.
4.2 On Ground Floor Mechanical Duct Plan, provide RG -1 in Room B39.
4.3 On Ground Floor Mechanical, add heat pump H P-18 to Room B03 and locate on west wall where
existing was located.
4.4 Add heat pump HP -19 in Room B07 and locate in southeast corner on south wall.
4.5 Move HP -17 to northeast corner of Room B24 on east wall.
4.6 Move HP -14 to southeast corner of Room B25 on east wall. Install a finished wood -furring base
along east wall of Room B25 for the piping and conduit required to serve HP -14 and HP -17. The
furred out shelf shall be sized to accommodate the HP -14 with room for all the required services for
those two heat pumps.
4.7 On First Floor Mechanical Duct Plan, provide an RG -1 in Room 137.
4.8 Add Mechanical Note #22 to read as follows: " Heat pumps, HP -5, 14, 15, 16, 17, and 19 are new
installations requiring extension of condenser water supply and return piping, condensate drain
piping, power wiring and new thermostat. All other heat pumps shown on ground floor are direct
replacements of existing console heat pumps with connection to existing services.
5. REFER TO SHEET M5
5.1 On Third Floor Mechanical Duct Plan in Office 308, replace the two existing air diffusers with type
CD -4. Delete the new RG -1 indicated in Room 308.
6. REFER TO SHEET M6
6.1 Repair wooden screen around cooling tower after cooling tower is replaced.
6.2 At Plan A, add the following note:" Provide self regulating heat tape at all water lines located
outdoors.
7. REFER TO SHEET M7
7.1 On Ground Floor Piping Plan, provide %' CWR , %z" CWS and Y." condensate drain from HP -5 to
existing horizontal pipes below location shown. Existing piping is in furred out base above the floor.
7.2 On Ground Floor Piping Plan In Room 307, provide A" CWR, IA" CWS and %" condensate drain
from new HP -19 to existing horizontal piping in furred out base under new HP -5 locations.
7.3 On Ground Floor Piping Plan extend 34" CWS, VA" CWR and 1" condensate drain along floor of
Room B25 and connect %:" runouts to HP -14 and HP -17 respectively along with %" condensate
drain runouts. This piping shall be enclosed in a finish wooden base back to the north wall of
Room B25 and piping extended into Mechanical Room to connect to piping services.
7.4 On Ground Floor Piping Plan ,extend 1" CWS and 1" CWR from those services in Ground Floor
Mechanical Room to HP -15. This may run over the ceilings in Rooms B34 and B35. Extend new 1"
condensate drain for HP -15 to existing floor drain in that room.
7.5 On First Floor Piping Plan, extend 1" CWR and 1" CWS from first floor main Mechanical Room
condenser water headers to HP -16 which will be located in Room 134. Label HP -16 in Room 134.
Extend 1" condensate drain from HP -16 to existing floor drain in that room.
7.6 on First Floor Piping Plan, 2" condensate drain with trap from new AC -1 to existing condensate
drain stack in the same room.
8. REFER TO SHEET M8
8.1 On Second Floor Piping Plan and Third Floor Piping Plan, provide 2" condensate drain with traps
from AC -2 and AC -3 respectively to the condensate drain stack located in their respective
mechanical rooms.
9. REFER TO SHEET M11
9.1 In Mechanical Equipment Schedule under comments for AC -1, 2, and 3, change first floor to first,
second and third floor ,respectively.
9.2 In Mechanical Equipment Schedule, Cooling Tower CT -1, should have a single point connection of
electrical power .Under capacities, change 80° wet bulb to 78° wet bulb.
9.3 In Mechanical Equipment Schedule add heat exchanger HX -1 as follows: HX -1, Polaris, model
SL140TL-140, plate heat exchanger, GPM 49, EWT 180°, LWT 168°.
9.4 in Air Device Schedule, add retum grille RG -1 described as follows RG -1, retum grille, IA" x %" x'/2'
egg crate, E.H. Price, model C80, 24 x 24 frame, 22 x 22 face, alum, white, lay -in, up to 1600 CFM.
9.5 In Water Source Heat Pump Schedule, change heat pump HP -4 to as follows: Trane, model
WPCD040, 1200 CFM, 1/10 horsepower fan, 40 MBH cooling cap, 52 MBH heating cap 54 07
mbh heat rejection, 37.14 MBH heat absorption, 10 82 GPM, 230 volt/1 phase, 21.3 FLA, 26.2
MCA, 45 MOCP.
9.6 in Water Source Heat Pump Schedule, add heat pump HP -18 and HP -19 each with model number
and specifications the same as for heat pump HP -5 listed in schedule.
2
98011.DOENDUM 1`SEPlt0.doc
•
ciGreen
Anderson
ENGINEERS, Inc.
2233 N Green Acres Rd. Fayetteville, Arkansas 72703, Phone (501)442-46821 FAX: (501) 442-0413
MECHANICAL & ELECTRICAL
Addendum No.2
PROJECT: Fayetteville City Administration HVAC Renovation
PROJ # : 98013
DATE: Sept. 25, 1998
The following addenda shall become a part of the contract documents dated September 9, 1998, and
entitled HVAC Renovation Administration Building, City of Fayetteville.
CHANGES TO DRAWINGS
1. REFER TO SHEET M11, MECHANICAL SCHEDULES
1.1 At the mechanical insulation schedule: Condenser water piping indoors shall not be insulated. All
water piping outdoors shall be insulated with 1 inch fiberglass with .016 embossed aluminum
jacket. The high-pressure spiral ducts between the ac units and the vav boxes shall be spiral pipe.
The pipe for the first 20 feet from the ac units shall be double wall equal to united mcgill acousti k27
with 1 -inch insulation and perforated metal liner. The remainder of the spiral duct shall be single
wall wrapped with 1 inch duct wrap.
2. REFER TO SHEET M10, MECHANICAL SYSTEM POINT LIST PLAN
2.1 At the heat pumps, delete the signal to the bas for condenser water supply and return temperature
and return air temperature. Provide one signal to the BAS to alarm compressor lockout .
2.2 At the ac units delete the high and low pressure alarms to bas. Unit will still have high and low
pressure cutout. Signal the BAS in the event of any kind of compressor lockout.
END OF ADDENDUM
Green
CI Anderson
ENGINEERS, Inc.
2913 N Green Acres Rd. Fayetteville, Arkansas 72703, Phone (501)442-4682 / FAX: (501)442-0413
MECHANICAL
Addendum No.3
PROJECT: Fayetteville City Administration HVAC Renovation
PROJ #: 98013
DATE: October 14, 1998
The following addenda shall become a part of the contract documents dated September
9, 1998, and entitled HVAC Renovation Administration Building, City of Fayetteville.
These addenda shall supercede any previous contract documents with which they may
conflict.
I. CHANGES TO DRAWINGS
A. MECHANICAL
1. REFER TO SHEET M11, WATER SOURCE HEAT PUMP SCHEDULE
1.1 The following heat pumps shall be changed to a Trane Model WPCE006 equal to
HP -5:
HP -3
HP -6 through HP -10
HP -13
HP -14
HP -17
1.2 Heat pumps 15 and 16 shall be vertical units.
II. CHANGES TO SPECIFICATIONS
A. BIDDING AND CONTRACT DOCUMENTS
1. REFER TO SECTION 01010 — GENERAL REQUIREMENTS
1.1 First paragraph, the Bid Date and Time will be November 3, 1998 at 3:00 PM at
Room 326 in City Administration Building.. A Pre -Bid Conference and walk-
through will be held on October 27, 1998 at 3:00 PM at the same location.
2. REFER TO SECTION 01100 — BID FORM
2.1 Add the following line below the base Bid Amount: A Deductive Alternate amount
for the Owner to provide clean up and housekeeping services each morning
before business hours. Contractor will still be required to clear the occupied
spaces of equipment and large construction debris. However, the Owner shall
provide the final clean up and housekeeping each day. A new Bid Form is
attached for contractor s use.
3. REFER TO ADDENDUM NO. 1
3.1 Paragraph 1.4.1 on the first page, Contractor shall omit the second operator
interface at remote location. The one and only operator interface shall be located
in Room 215 on the Second Floor.
END OF ADDENDUM
9.7 Add to Mechanical Equipment Schedule, AS -1 Amtrol model 3AS with 3" connection, AS -2 Amtrol
model 4AS with 4" connection.
9.8 Add to Mechanical Equipment Schedule, ET -1, Amtrol AX -20, 10.9 gallon, 2.4 -gallon maximum
acceptance.
B. ELECTRICAL
1. REFER TO DRAWING El
1.1 On Ground Floor Electrical Power Plan, existing panels 1000 and 100 are located on north wall of
Mechanical Room in lieu of south wall where shown. Provide a 100 amp, 3 pole circuit breaker in
existing panel 1000 which is Square D type NQOD and feed new panel 1000A to be located
across the mechanical room entry near the new BAS location. New panel shall have circuit
breakers in accordance with the attached Panel Schedule. Extend all of the new 240 volt circuits to
new panel 1000A in lieu of 1000 as shown except HP -15 and HP -16.-19.
1.2 On Ground Floor Electrical Power Plan, change homerun designation for HP -15 from 1000-X to
MDP. MDP is located in same room as HP -15 and is a Cutler Hammer panel. Provide 70 amp 2
pole circuit breaker in existing MDP.
1.3 On First Floor Electrical Power Plan, change homerun designation for HP -16 from 1000-X to MDP.
MDP is located below HP -16 on the ground floor. Provide an additional 70 amp 2 pole circuit
breaker in existing Cutler Hammer MDP for HP -16.
1.4 On Note 7, add the following: " Connect duct detectors in air conditioning units to the respective
fire alarm zone for each floor. Provide any necessary relays for this interface.".
2. REFER TO SHEET S-1
2.1 Add Note #3 : Steel frame is to be installed under AC -1, 2 and 3 at first floor, second floor, and third
floor, respectively. Coordinate location of columns with existing conditions. Some piping, conduit,
etc may require relocation in order to set columns at ground floor.
2.2 Add Note #4 to read as follows in mechanical room to provide one hour fire rating. The duct chases
involved are located in the stacked mechanical rooms. Duct systems are exhaust stack and outside
air stack from roof to ground floor and the outside air ducts serving the new air conditioners AC -1,
2, and 3. Provide metal stud frame and 5/8" type "X" gyp board around ducts continuously from top
to bottom. Seal around duct runouts at each floor with approved fire sealant. Fire dampers in
runouts will not be required but must be sealed at the gyp board around new and existing floor
penetrations in mechanical rooms to prevent the passage of smoke. This includes existing
penetrations for ducts, piping and conduit that penetrates the mechanical room floors.
END OF ADDENDUM
3
OOO13.ADDENDUM 1-SEPT100oc
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
BID FORM
SECTION 01100
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
TO: City of Fayetteville
113 W. Mountain
Fayetteville, AR 72701
The undersigned, in compliance with Notice to Bidders, and having examined the Instructions to
Bidders, other General Requirements, Drawings, Specifications and related documents for the
above referenced job, and having examined the site, and being familiar with all of the conditions
surrounding the proposed project, including the availability of material, equipment and labor,
hereby proposes to furnish all labor, materials, equipment and services to construct the project in
accordance with the contract documents, within the time herein state, and at the pnce stated
below. This price is to cover all expenses incurred in performing the work required under the
contract documents, of which this proposal is a part.
Bidders acknowledges receipt of the following addenda:
Base Bid Amount
Deductive Alternate:
#1(Owner to provide clean up and housekeeping services each morning).
Bidder understands that the Owner reserves the right to reject any or all bids and to waive any
formalities in the bidding and that this bid shall be good and may not be withdrawn for a period of
sixty (60) calendar days after the scheduled closing time for receiving bids.
Upon receipt of Notice of Acceptance of Bid, Bidder will execute the formal contract and will,
within the (10) days, deliver a surety bond or bonds for the faithful performance of the contract
and agrees to substantially complete all work within :tom calendar days from Notice to Proceed.
210
01100-1
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
The bidder further agrees to furnish to the Owner, prior to commencing work, certificate of
insurance, as specified in these documents
The bid security attached in the sum of
($
is to become property of the owner in the event the contract and bond are not executed within the
time above set forth, as liquidated damages for the delay and additional work caused thereby.
SUBCONTRACTORS:
The undersigned designated successful subcontractor to whom subcontract will be awarded if the
proposal is accepted: ( If same as Prime Contractor, state such.)
Mechanical:
Electncal:
(Seal, if by Corporation) Respectfully Submitted,
Prime Contractor.
BY:
TITLE:
Contractor License NO:
Business Address:
Date:
01100-2
TABLE OF CONTENTS
HVAC RENOVATION
ADMINISTRATION BUIDLING
CITY OF FAYETTEVILLE
BIDDING AND CONTRACT DOCUMENTS
DOCUMENT NO.
TITLE
01010 General Requirements
01050 Instructions to Bidders
01100 Bid Form
01200 General Conditions
01400 Supplementary General Conditions
01500 Wage Rates
•
DIVISION 05 — STRUCTURAL
Section 05120
DIVISION 15 - MECHANICAL
Section 15010
Section 15240
Section 15250
Section 15412
Section 15413
Section 15510
Section 15553
Section 15711
Section 15780
Section 15790
Section 15791
Section 15891
Section 15933
Section 15949
DIVISION 16 - ELECTRICAL
Section 16010
Section 16110
Section 16120
Section 16130
Section 16140
Section 16170
Section 16190
Section 16195
Section 16450
Section 16481
Structural Steel
General Mechanical Requirements
Vibration Isolation
Mechanical Insulation
Domestic Water Piping System
Natural Gas Piping System
Hydronic System with Water Treatment (15510.wtx)
Horizontal Inclined Watertube Hot Water Boiler
Mechanical Draft Closed Circuit Industrial Coolers
Hydronic Heat Pump Units
100% Outside Air Heating/Cooling Units
Packaged Self Contained Air Conditioning - Water Cooled.
Low and Medium Pressure Ductwork and Accessories
Fan Powered VAV Box with Hot Water Heat
BAS System for VAV Roof -Top Units
General Electrical Requirements
Raceways
Wires and Cables
Boxes and Enclosures
Wiring Devices
Disconnect Switches
Supporting Devices
Electrical Identification
Grounding
Motor Starters, Full Voltage
LIST OF DRAWINGS
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
M11
Mechanical
Mechanical
Mechanical
Mechanical
Mechanical
Mechanical
Mechanical
Mechanical
Mechanical
Mechanical
Mechanical
Demo Plans Ground and First floors
Demo Plans Second and Third Floors
Demolition Roof Plan
Plans Ground and First Floors
Plans Second and Third floors
Roof Plan
Piping Plans Ground and First Floors
Piping Plans Second and Third Floors
Details
System Point List
Schedules
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El Electrical Plans Ground and First Floors
E2 Electrical Plans Second and Third Floors
E3 Electrical Roof Plans and Schedules
S1 Structural Framing
•
END OF TABLE OF CONTENTS
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Project 98013
HVAC System Renovation
City of Fayetteville Administration Buidling
GENERAL REQUIREMENTS
SECTION 01010
PART 1 - ADVERTISEMENT FOR BIDS — BID # 98-77
Sealed bids will be received by the City of Fayetteville in Room 326 of City Administration at 113
W. Mountain, Fayetteville, Arkansas until 2:00 p.m., local time September 23, 1998. Immediately
after the specified closing time, the bids will be publicly opened in the Administration Building at
113 W. Mountain, Fayetteville, Arkansas. Bidding documents may be examined at the office of
the Engineer:
Green Anderson Engineers, Inc
2233 North Green Acres Road
Fayetteville, AR 72703
(501) 442-4682
and also at: ABC Plan Room ( Triangle) 1216 N. Garland, Fayetteville, Arkansas, 72703. Copies
of the bidding documents may be obtained from the Engineer upon deposit of $50.00 for each set
of documents. Upon returning such set in good condition within seven (7) days after bid opening
date, the deposit will be refunded 100%.
The contractors bid must be submitted on the prescribed bid form and accompanied by a
certified check or bid bond payable to the Owner in an amount not less than 5% of the base bid.
Prevailing wage rates will apply in accordance with Act 74 of 1969 of the General Assembly of the
State of Arkansas.
In accordance with Act 150 of 1965, as amended, all bidders shall conform to the requirements of
the Arkansas State Licensing Law for Contractors There shall be only one (1) bid submitted per
State Contractor's License Each bid received shall have the license number for that bidder.
No bid may be withdrawn after the scheduled closing time for at least thirty (30) days. The City
reserves the right to waive any formalities and to reject any or all bids.
END OF SECTION
01010-1
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
INSTRUCTIONS TO BIDDERS
SECTION 01050
PART 1 - DEFINITIONS:
A. All definitions set forth in the Standard General Conditions of the Construction
Contract, EJCDC Document 1910-8 1990 Edition are applicable to these
Instructions to Bidders.
B. Bidding documents include the Notice to Bidders, Instructions to Bidders, the Form
of Bid, Drawings and Specifications, including any Addenda issued prior to receipt
of bids.
C. Addenda are written or graphic instruments issued prior to the execution of the
Contract which modify or interpret the Bidding Documents, including drawings and
specifications, by additions, deletions, clarifications, or correction. Addenda will
become part of the Contract Documents when the Construction Contract is
executed.
PART 2 - BIDDER'S REPRESENTATION:
A. Each bidder, by making his bid, represents that he has read and understands the
Bidding Documents.
B. Each bidder, by making his bid, represents that he has visited the site and
familiarized himself with the local conditions under which the work is to be
performed.
PART 3 - BIDDING PROCEDURES:
A. Bids shall be made upon the Bid Form issued by the Engineer and signed by an
individual authorized to bind the bidder. The signature shall be in longhand; no oral,
telegraphic, facsimile or telephonic bids will be considered, but modifications by
telegraph or facsimile of bid already submitted will be considered, if received pnor
to the time set for opening.
B. Bids shall be addressed to and delivered to the place designated for opening of
bids before time for opening the bids as set forth in the Notice to Bidders, enclosed
in an opaque, sealed envelope addressed as stated in the Notice to Bidders,
marked "Bid" and bearing the title work and the name and address of the bidder.
01050-1
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
C. Bids received prior to the time of opening will be kept, unopened. No bid received
after the hour set for their opening will be considered. No responsibility will be
assumed by any person for the premature opening of a bid not properly addressed
and identified.
PART 4 - EXAMINATION OF BIDDING DOCUMENTS:
A. Should the Bidder find discrepancies in or omissions from the drawings or other
bidding documents, or should he be in doubt as to their meaning, he should, at
once, notify the Engineer, who will send a written addendum to all bidders. Neither
the Owner nor the Engineer will be responsible for any oral instructions. Any
addenda issued during the time of bidding are to be acknowledged in the proposal
and in executing a contract, they will become a part thereof.
PART 5 - QUALIFICATIONS OF BIDDERS:
A. The Prime Bidder shall be a Contractor with a current license complying with the
Arkansas State Licensing law for Contractors. The Contractor shall indicate on his
bid, his current license number
B. The Bidder will not be acceptable if he is engaged on any other work which impairs
his ability to finance this contract or provide proper equipment for the proper
execution of same.
C. The Bidder must be prepared to furnish a Performance and Payment Bond in
accordance with the Arkansas Statutory requirements written by a surety company
authorized to do business in the State of Arkansas.
PART 6 - REJECTION OF BIDS:
A. The Bidder acknowledges the right of the Owner to reject any or all bids and to
waive any formality or irregularity in any bid received. in addition, the bidder
recognizes the right of the Owner to reject a bid if the Bidder faded to furnish the
required bid security, or to submit the data required by the Bidding Documents, or if
the bid is in any way incomplete or irregular.
PART 7 - SUBMISSION OF POST -BID INFORMATION:
A. Upon receipt of written notice of the acceptance of his bid, the successful
Contractor shall execute a contract, in accordance with good and sufficient surety
or sureties, within ten (10) calendar days after the prescribed forms are presented
for signature. Required bond and insurance documents shall be furnished before
the work is started.
01050-2
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
B. Within seven (7) days after execution of the contract, the Contractor shall furnish to
the Engineer a statement of costs or each major item of the work included in his bid
and a list of the subcontractors proposed for the principal portions of the work The
bidder will be required to establish to the satisfaction of the Engineer and the
Owner the reliability and responsibility of the proposed subcontractors to furnish
and perform the required work.
C. The Contractor will be required to keep an accurate accounting of all labor and
materials entering into the job. It will be required that this be kept up to date.
PART 8 - FORM OF CONTRACT
A. The Contract shall be the Standard Form of Agreement Between Owner and
Contractor on the Basis of a Stipulated Price, EJCDC Document 1910-8-A-1, 1990
Edition. I his document is on file at the Engineer's office and may be inspected by
Bidders.
END OF SECTION
01050-3
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
BID FORM
SECTION 01100
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
TO: City of Fayetteville
113 W. Mountain
Fayetteville, AR 72701
The undersigned, in compliance with Notice to Bidders, and having examined the Instructions to
Bidders, other General Requirements, Drawings, Specifications and related documents for the
above referenced job, and having examined the site, and being familiar with all of the conditions
surrounding the proposed project, including the availability of material, equipment and labor,
hereby proposes to furnish all labor, materials, equipment and services to construct the project in
accordance with the contract documents, within the time herein state, and at the price stated
below. This price is to cover all expenses incurred in performing the work required under the
contract documents, of which this proposal is a part.
Bidders acknowledges receipt of the following addenda:
Base Bid Amount
($
Bidder understands that the Owner reserves the right to reject any or all bids and to waive any
formalities in the bidding and that this bid shall be good and may not be withdrawn for a period of
sixty (60) calendar days after the scheduled closing time for receiving bids.
Upon receipt of Notice of Acceptance of Bid, Bidder will execute the formal contract and will,
within the (10) days, deliver a surety bond or bonds for the faithful performance of the contract
and agrees to substantially complete all work within 150 calendar days from Notice to Proceed.
The bidder further agrees to furnish to the Owner, prior to commencing work, certificate of
.insurance, as specified in these documents.
01100-1
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
The bid security attached in the sum of
($
is to become property of the owner in the event the contract and bond are not executed within the
time above set forth, as liquidated damages for the delay and additional work caused thereby.
SUBCONTRACTORS:
The undersigned designated successful subcontractor to whom subcontract will be awarded if the
proposal is accepted: ( If same as Prime Contractor, state such.)
Mechanical:
Electrical:
(Seal, if by Corporation) Respectfully Submitted,
Prime Contractor:
BY:
TITLE:
Contractor License NO:
Business Address:
Date:
01100-2
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
General Conditions
Section 01200
The Standard General Conditions of the Construction Contract NSPE/ACEC Document 1910-8,
1978 Edition, Articles 1 through 17, shall be a part of this specification as through it were
attached hereto. This document is on file at the Engineer's office and may be inspected by the
Contractor and others.
The Standard General Conditions of the Construction Contract, shall be supplemental as
follows:
Inspection: The Contractor awarded this project agrees to allow any Federal or State Inspector,
acting in their official capacity, to have access to the job site.
END OF SECTION
01200-1
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
Supplementary General Conditions
Section 01400
PART 1.01 - PERFORMANCE AND PAYMENT BOND:
The successful bidder shall furnish to the Owner an executed Statutory Performance Bond
and an executed Labor and Material Payment Bond, each in an amount at least equal to
One Hundred percent (100%) of the accepted proposal as security of the faithful
performance of the contract, and as security for the payment of all persons performing
labor and furnishing matenals in connection with his contract. The surety shall be a surety
company authorized to do business in the State of Arkansas. The bonds must be
executed by a licensed Resident Local Agent of Arkansas and the bonds shall be a
statutory performance and payment bond conforming to the requirements of the State of
Arkansas. Performance and payment bond shall be filed in the Circuit Court of Washington
County.
PART 2.01 - INSURANCE:
A. The Owner and the Engineer shall be named as additional named insured in all
policies of insurance protecting the type of claims for which the Owner or the
Engineer could be held jointly liable.
B. Add the following requirements to apply to all insurance required under Article 5 of
the GENERAL CONDITIONS:
1. Insurance shall be with a reliable company having at least an "A" or better
financial rating or a "B" or better General Policy Holders Rating (according to
the latest A.M. Best Report) of the Contractor's choice, acceptable to and
approved by the Owner and authorized to do business in the state where the
project is located.
2. The Contractor shall have the policies endorsed to reflect and insure any
occupancy by Owner at the time of such occupancy.
3. All liability policies referred to in the Article shall be maintained in the same
company.
4. The Owner's right to approve policies or certificates of insurance shall not be
construed as imposing a duty on the Owner or the Engineer to ascertain the
Contractor has effected the required insurance. Failure of the Owner or the
Engineer to signify approval or acknowledge receipt of policies or certificates
of insurance shall in no way relieve the Contractor of his obligation to
purchase and maintain the required insurance. Approval by the Owner
01400-1
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ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
I
and/or Engineer of certificates of insurance furnished by the Contractor shall
not be construed as approval of the actual policies, and shall not tend to
lessen the Contractor's responsibility for securing and maintaining all
insurance coverage required by these Contract Documents.
5. Certificates of Insurance acceptable to the Owner shall be filed with the
Owner prior to signing the contract. The Owner may also require that a true
copy of all policies specified be filed with him. Each and every policy and
certificate shall contain an endorsement stating that the insurance company
will not, prior to the completion of the project or any policy expiration date
shown on the policy and certificate, whichever occurs first, terminate the
policy or change any coverage therein without first mailing to the Owner, by
registered mail, written notice of such action at least thirty (30) days prior to
the termination or change. The Contractor shall use AIA Document G-705 or
approved equal as a certificate of insurance form.
6. If the Owner requests in writing that insurance for risks other than those
described in Subparagraphs 5.6 and 5.7 or other special hazards be
included in the property insurance policy, the Contractor shall, if possible,
include such insurance and the cost thereof shall be charged to the Owner
by appropriate Change Order.
C. Paragraph 5.3 CONTRACTOR'S LIABILITY INSURANCE shall be supplemented
as follows:
The Contractor shall, before commencing any work to be conducted under
this contract, procure Workmen's Compensation and Employer's Liability
Insurance with an insurance company authorized to write such policies of
insurance in the State of Arkansas. It shall be the further responsibility of the
Contractor to require that all subcontractors have in full force and effect a
policy of Workmen's Compensation and Employer's Liability Insurance
before proceeding with any of the work required under this contract. The
contractor shall procure and maintain, during the life of this contract, such
public liability and property damage insurance, including the operation of
motor vehicles, with limits as hereinafter provided, which will cover the
Contractor's, the Owner's and Engineer's legal liability arising out of the work
performed by the Contractor and any subcontractor, and by anyone directly
or indirectly employed by either of them for claims for damages for personal
injury, including accidental death, as well as claims for property damages,
which may arise from operations under this contract.
D. Insurance coverage specified in the GENERAL CONDITIONS (NSPE-ACEC 1910-
8, 1978 Edition) to be provided by the Contractor, and any other insurance
described below shall be furnished with the following limits:
01400-2
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CITY OF FAYETTEVILLE
I1. Workmen's Compensation (Clause 5.3)"
Applicable State Standard Arkansas
' Employer's Liability $100,000
2. Contractor's Liability Insurance (Clause 5.3) including Contractual Liability
(Sub -paragraph 5.4):
' Form of insurance shall be Comprehensive General Liability.
I.
Bodily Injury $500,000 each occurrence
$500,000 aggregate
' Property Damage $250,000 each occurrence
$500,000 aggregate
Personal Injury
Each Person - Aggregate $100,000
General - Aggregate $100,000
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Motor Vehicle Liability
Bodily Injury
Property Damage
$250,000 each person
$500,000 each occurrence
$100,000 each occurrence
Contractual Liability Same as Comprehensive General Liability above.
XCU Coverage Remove exclusion
Umbrella Policy The Contractor shall procure and maintain
during the life of this Contract, an Umbrella
Policy in the amount of $1,000,000.
Owner Protecting Coverage:
A Contractual insurance Endorsement to the comprehensive general liability
insurance mentioned above insuring and making reference to the Contract in
question containing the following "Hold Harmless Clause": "Contractor agrees to
indemnify and hold Owner, its officers, agents, and employees, and Engineers,
harmless from and against any and all claims, demands, suits and judgments for
damage to property or injury to or deaths of, persons caused by any act, neglect,
omission or fault on the part of Contractor, or on the part of any Subcontractor,
arising out of or in any way connected with the work performed under this Contract,
including all court costs and attorney's fees". Reference should name the specific
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01400-3
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
Contract between the Owner and the Contracting organization.
F. In addition to the agreement to insure the owner with the Hold Harmless Clause as
described above, the Contractor personally herewith agrees to hold the Owners, its
officers, agents, and employees, and the Engineers harmless from and against any
and all claims, demands, suits, and judgments for damaged property or injury to or
death of persons caused by any act, neglect, omissions, or fault on the part of the
Contractor on the part of any subcontractors arising out of or in any connection with
the work performed under this contract including all court costs and attorney fees.
G. Contractor shall notify the Engineer by telephone (Green Anderson Engineers Inc.
501-442-4682) immediately of any serious bodily injury to his employees and/or the
public, if related to this work and shall also file a written report of same with the
Owner and the Engineer. Contractor shall file a written report with the Owner
regarding any property damage insurance to be carried by the Owner.
H. Paragraph 5.5 OWNER'S LIABILITY INSURANCE is hereby superseded by the
"Owner Protecting Coverage" required above. ,
Paragraph 5.6 PROPERTY INSURANCE is hereby amended and/or revised to
incorporate the following:
"The Owner will carry fire insurance, extended coverage insurance and vandalism
and malicious damage insurance to the full and insurable amount thereof. Property
insurance provided by Owner will not include coverage for tools owned by
mechanics, or tools, equipment, scaffolding, staging, towers, and forms owned or
rented by the Contractor, the capital value of which is not included in the costs of
the work; nor will coverage include shanties, toilets or other structures erected for
comfort of the workmen."
PART 3.0 - WARRANTY:
The Contractor shall absolutely guarantee and warrant his and his subcontractors work
and materials (including the materials and work of suppliers of the Contractor and his
subcontractors) for a period of one year from the date of substantial completion of the
project. The Contractor shall leave the project in perfect order at completion. This
Warranty shall be for a longer period on certain items so designated in the specifications.
The foregoing one-year warranty shall not in any way limit, restrict or affect the liability of
the Contractor or his subcontractors, for indemnity as provided for in this contract, nor shall
it in any way shorten the period of limitation fixed by law for the filing of any action against
the Contractor for enforcement or for breach of any provision of the contract documents.
Should the Contractor elect to use any of the equipment during the construction period, he
shall make arrangements with the subcontractor or supplier of that equipment for any
extension of warranty of that equipment made necessary by such use. The Warranty
01400-4
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period for such equipment to the Owner shall not be reduced by the use of the equipment
by the Contractor.
PART 4.0 - PAYMENT:
A. TAXES:
The contractor shall include in his bid all State Sales Tax, Social Security Taxes,
State Unemployment Insurance and all other items of like nature. It is the intent that
the bid shall represent the total cost to the Owner of all work included in the
contract. There are no provisions for a contractor to avoid taxes by using the tax
exempt number of a state agency, board, commission or institutions.
B. PAYMENT TO THE CONTRACTOR:
The Owner will make periodic payments within 30 days of the Contractor's
Application for Payment after approval and certification by the Engineers. The
Owner will pay for work completed less ten percent (10%) retainage.
C. FINAL PAYMENT REQUEST:
The contractor shall submit Consent of Surety for Final Payment Form with final
payment request. Failure to do so will result in a DELAY of payment.
D. The contractor shall promptly pay each subcontractor, upon receipt of payment
from the owner, out of the amount paid to the contract on account of said
subcontractor's work. The contractor shall require each subcontractor to make
payments to his subcontractors in similar manner. Failure to promptly pay
subcontractors shall be cause to call upon the contractors payment bond for relief.
E. PAYMENT WITHHELD:
IF
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The Engineer may nullify the whole or any part of any Certificate for Payment
previously issued, to such an extent as may be necessary in his opinion to protect
the Owner from loss because of:
1. Defective work not remedied;
2. Third party claims filed or reasonable evidence indicating problem filing to
such claims.
REQUEST FOR PAYMENT:
Request for Payment should be submitted on Application for Payment Form
EJCDC # 1910-8-E (1990 Edition) which is attached at the end of this section.
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01400-5
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
PART 5.0 - CONTRACT TIME:
The Contractor shall substantially complete all work under this contract within -0ae-
Hundred �� calendar days from receipt of notice to proceed. The Contractor shall
increase his for mss, work overtime, double shifts, or take other measures necessary to
complete the work within the Contract time.
PART 6.0 - USE OF BUILDING BY OWNER:
The Owner will occupy the building during the time work is being performed. The
Contractor shall cooperate with the Owner to minimize distribution of the Owner's
activities. The Contractor shall carefully plan his work in phases that will maintain heating
and cooling for the occupants or shall arrange temporary services as required to allow
Owner to maintain normal operations.
PART 7.0 - TEMPORARY FACILITIES:
The Contractor shall provide and maintain telephone & any necessary office space..
PART 8.0 - CLEANING UP:
The Contractor shall at all times keep the building and surrounding premises free from
waste materials or rubbish resulting from his work. Upon completion of the work, the
Contractor shall remove all surplus materials, equipment, tools, etc. and clean all
equipment.
PART 9.0 - PROTECTION:
It shall be the Contractor's and his subcontractor's full and entire responsibility to execute
and perform all work on this project in such a manner and with such equipment and
procedures as necessary to prevent the loss of life or injury to any person or damage to
any property.
The Contractor shall continuously maintain adequate protection of all his work from
damage and shall protect the Owner's property from injury or loss arising in connection
with the contract. He shall adequately protect adjacent property as provided by law and the
contract documents.
Contractor shall at all times provide protection against rain, wind, storms, frost, or heat so
as to maintain all work, materials, apparatus, and equipment free from injury or damage.
At the end of each day's work all new likely to be damaged shall be covered.
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01400-6 ,
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HVAC RENOVATION
I ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
The Contractor shall take all necessary precautions for the safety of employees on the
work, and shall comply with all applicable provisions of Federal, State and Municipal safety
laws and building codes to prevent accidents or injury to persons on, about, or adjacent to
' the premises where the work is being performed. He shall erect and properly maintain at
all times, as required by the conditions and progress of the work, all necessary safeguards
for the protection for workmen, and the public and shall post danger signs warning against
the hazards created
by such
gestures
of
construction. The
Contractor shall not load or
permit any part of the
work to
be loaded
so
as to endanger its
safety or endanger lives.
' PART 10.0 - LABOR AND WORKMANSHIP
All contractors and subcontractors employed on the work shall and will be required to
' conform to the labor laws of the State of Arkansas and the various acts amendatory and
supplementary thereto; and to all other laws, ordinances and legal requirements applicable
thereto.
' All labor shall be performed in the best and most workmanlike manner by mechanics
skilled in their respective trades.
The Contractor shall employ a qualified superintendent that will be on this job. The
Contractor shall submit proof of the superintendent's qualifications for approval by the
' Engineer, if requested. The superintendent may not be changed unless such change is
approved by the Engineer.
' PART 11.0 - CHANGES IN THE WORK:
Without invalidating the contract, the Owner may order extra work or make changes by
altering, adding to or deducting from the work, the contract sum being adjusted
accordingly, and the consent of the surety being first obtained where necessary or
' desirable. Changes need to be requested on Change Order Form EJCDC#1910-8-B
(1990 Edition) which is attached at the end of this section.
No claims for any extra work or materials shall be allowed unless the work is ordered in
writing by the Owner through the Engineer.
The Contractor shall be required, if called upon, to furnish the original bills and payrolls
and support the statement with proper affidavits. The burden of proof of the costs rests
upon the Contractor.
Bills for extras will be allowed only when work is ordered in writing. No bills based on
verbal orders will be allowed by the Owner unless accompanied by a written order from
the Owner through the Engineer.
01400-7
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
The Contractor waives all claim for extension of time of completion on account of extra
work, unless application for such extension of time is made by the Contractor in writing '
within 24 hours of the time such work is ordered.
PART 12.0 - DAMAGE TO WALKS, CURBS, AND OTHER PROPERTY:
The Contractor shall be responsible for all damages caused to walks, curbs, landscaping,
and grounds through activities under this contract.
PART 13.0 ELECTRICAL LICENSE REQUIREMENTS
A. No person shall perform electrical work on the contract without possessing an
Arkansas State Master or Journeyman License from the Arkansas State Electrical
Examiners Board. All electrical work and apprentice electricians shall be supervised '
by a Master or Journeyman Electrician on a one to one ratio.
B. All electricians shall have a copy of their license with them and shall be required to ,
show it to an appropriate inspector upon request.
PART 14.0 LIQUIDATED DAMAGES:
A. If the Contractor fails to complete the work within the time agreed to in this
Contract, or any agreed extension thereof, he shall pay to the owner as liquidated
damages, fixed or agreed, and not as a penalty, the sum of Two Hundred Fifty
Dollars ($250.00) for each calendar day of delay of the work, which sum shall be
withheld by the Owner from payments due to be made to the Contractor by the
Owner under the terms of the contract.
END OF SECTION
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
WAGE RATES
Section 01500
PART 1 - WAGE RATES
The requirements of Act 74 of 1969 of the General Assembly of the State of Arkansas
apply on this project. Arkansas Wage Determination, 98-109, which established the
current prevailing wages to be paid on this project is contained herein. Not less than the
prevailing hourly wage rates shown shall be paid to workers on this project.
END OF SECTION
01500-1
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Page 1 oft ARKANSAS DEPARTMENT OF LABOR
PREVAILING WAGE DETERMINATION — BUILDING RATE
DATE: September 4, 1998 DETERMINATION 0:98-109
PROJECT: HVAC System Renovation COUNTY: Washington
Fayetteville City Administration Building EXPIRATION DATE: 3-4-99
Fayetteville, Arkansas SURVEY #: 798-AR05
BASIC
CLASSIFICATION HOURLY FRINGE
Asbestos Worker/Insulator RATE BENEFITS
Bricklayer/Pot, Cleaner, Caulker 17.60
Carpenter 17.60
12.05
Concrete Finisher/Ccmcm 10,15 15
.45
Electrician13.20 5 /Alarm Installer
Elevator Mechanic 2,00
Elevator Helper 17.20 7.50
12.04 7.08
Glazier 10.95 .70
HVACR Mechanic 13.05 .30
Ironworker 11.85
Laborer 2.80
8.30
Marb1cffile/ferrazzo Worker 12.69
Millwright 10.85 1.65
Painter/Sbea Rock Finisher 9.80
Plasterer 13.60
Plumbcr/Pipefitter 13.00
Roofer 1.00
Sheet Metal Worker 1.90 2.00
11.90 .65
Sprinkler Fitter 15.30 .85
Tnjek lhiver 10.05
Waterproofer 14.00 1.09
Power Equipment Operators:
Group 1 14.75
Group II 2.80
11.45 1
Group Ill.70
11.00
Group IV 9.50
Welders --receive rate prescribed for craft performing operation to which welding is incidental.
Certified July 1, 1998
CLASSIFICATIONS THAT ARE NOT LISTED, BUT THAT ARE GOING TO BE WORKING ON
THIS PROJECT, SHOULD BE REQUESTED FROM THE ARKANSAS DEPARTMENT OF
LABOR, PREVAILING WAGE DIVISION. THESE WRITTEN REQUESTS SHOULD BE MADE
AS SOON AS YOU NOTICE THAT A REQUIRED CLASSIFICATION IS MISSING,
NORMALLY THIS WOULD BE DURING THE BID PROCESS.
09/04/1998 10:17 5016824508 ARDEPTLABDR PAGE 03
Page 2 of 2 ARKANSAS DEPARTMENT OF LABOR
PREVAILING WAGE DETERMINATION — BUILDING RATE
DATE: September 4, 1998 DETERMINATION #. 98-109
PROJECT: HVAC System Renovation COUNTY: Washington
Fayetteville City Administration Building EXPIRATION DATE: 3-4-99
Fayetteville, Arkansas SURVEY#: 798-AR05
Y�
Operators engaged in operating the following equipment: Cranes, draglines, shovels and piledrivers with
a lifting capacity of SO tons or over, and operators of all tower climbing cranes and derricks required to work
25 feet or over from the ground, blacksmith and mechanics.
Group '.
Operators engaged in operating the following equipment or performing work relative to the engineer's
jurisdiction: Hydraulic cranes, cherry pickers, backhoes, and all derricks with a lifting capacity less than 50
tons, as specified by the manufacturer, all backhoes, tractor or truck type, all overhead & traveling cranes, or
tractors with swinging boom attachments, gradealls, all above equipment irrespective of motive power,
leverman (engineer), hydraulic or bucket dredges, irrespective of size.
rou
Heavy E ui meM 9 P Operators. Operators engaged in operating the following equipment: all bulldozers, all
front end loaders, all sidebooms, skytracks, forklifts, all push tractors, all pull scrapers, all motor graders, all
trenching machines, regardless of size or motive power, all backfillers, all central mixing plants, 10S and
larger, finishing machines, all boiler fireman high or low pressure, all asphalt spreaders, hydro truck crane,
multiple drum hoist, irrespective of motive power, all rotary, cable toot, core drill or churn drill, water well
and foundation drilling machines, regardless of size, regardless of motive power and dredge tender operator.
Light Equipment Operators. Operators engaged in operating the following equipment: Oilerdriver motor
crane, single drum hoists, winches and air tuggers, irrespective of motive power, winch or A frame trucks,
rollers of all types and pull tractors, regardless of size, elevator operators inside and outside when used for
carrying workmen from floor to floor and handling building material, Lad-A-Vator Conveyor, batch plant,
and mortar or concrete mixers, below 105, end dump euclid, pumperete spray machine and pressure grout
machine, air compressors, regardless of size. All light equipment, welding machines, light plants, pumps, all
well point system dewateaing and portable pumps, space heater, irrespective of size and motive power,
equipment greaser, oiler, mechanic helper, drilling machine helper, asphalt distributor and like equipment,
safety boat operator and dockhand.
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STRUCTURAL STEEL
SECTION 05120
' PART1-GENERAL
1.01 DESCRIPTION OF WORK:
A. Extent of structural steel work is shown on drawings, including schedules,
' notes and details to show size and location of members, typical
connections and type of steel required.
B. Structural steel is that work defined in AISC "Code of Standard Practice"
and as otherwise shown on drawings.
C. QUALITY CONTROL:
1. Materials and fabrication procedures are subject to inspection and
tests in mill, shop and field, conducted by an approved inspection
agency. Such inspections and tests will not relieve Contractor of
responsibility for providing materials and fabrication procedures in
compliance with specified requirements.
2. Promptly remove and replace materials or fabricated components
which do not comply.
D. DESIGN OF MEMBERS AND CONNECTIONS:
1. Details shown are typical; similar details apply to similar conditions,
unless otherwise indicated. Verify dimensions at site whenever
possible without causing delay in the work.
2. Promptly notify Engineer whenever design of members and
connections for any portion of structure are not clearly indicated.
1.02 QUALITY ASSURANCE:
A. CODES AND STANDARDS: Comply with provisions of following, except
as otherwise indicated.
1. AISC "Code of Standard Practice for Steel Buildings and Bridges".
2. AISC "Specification for Structural Steel Buildings", including the
Commentary and Supplements thereto as issued.
05120-1
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3. AISC "Specification for Structural Joints using ASTM A 325 or A '
490 Bolts" approved by the Research Council on Structural
Connections of the Engineering Foundation.
4. AWS D1.1 "Structural Welding Code - Steel".
5. ASTM A 6 "General Requirements for Delivery of Rolled Steel
Plates, Shapes, Sheet Piling and Bars for Structural Use'.
B. QUALIFICATIONS FOR WELDING WORK:
1. Qualify welding processes and welding operators in accordance
with AWS "Standard Qualification Procedure".
2. Provide certification that welders to be employed in work have
satisfactorily passed AWS qualification tests.
3. If recertification of welders is required, retesting will be Contractor's
responsibility.
1.03 SUBMITTALS: I
A. PRODUCT DATA: Submit producer's or manufacturer's specifications
and installation instructions for following products. Include laboratory test
reports and other data to show compliance with specifications (including
specified standards).
1. Structural steel (each type), including certified copies of mill
reports covering chemical and physical properties. 1
2. High -strength bolts (each type), including nuts and washers.
3. Structural steel primer paint.
4. Shrinkage -resistant grout.
B. SHOP DRAWINGS:
1. Submit shop drawings prepared under supervision of a registered
Professional Engineer in the State of Arkansas, including complete
details and schedules for fabrication and assembly of structural
steel members, procedures and diagrams, for Structural Engineer's
approval. I
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2. Include details of cuts, connections, camber, holes, and other
pertinent data. Indicate welds by standard AWS A2.1 and A2.4
symbols, and show size, length, and type of each weld.
3. Provide setting
drawings,
templates, and
directions for installation
of anchor bolts
and other
anchorages to
be installed as work of
other sections.
C. TEST REPORTS: Submit copies of reports of tests conducted on shop
and field bolted and welded connections. Include data on type(s) of tests
conducted and test results.
D. SURVEYS: Submit certified copies of each survey, showing elevations
and locations of base plates and anchor bolts to receive structural steel
and final elevations and locations for major members. Indicate
discrepancies between actual installation and contract documents.
1.04 DELIVERY, STORAGE AND HANDLING:
A. Deliver materials to site at such intervals to insure uninterrupted progress
of work.
' B. Deliver anchor bolts and anchorage devices, which are to be embedded
in cast -in -place concrete or masonry, in ample time so as not to delay that
work.
' C. Store materials to permit easy access for inspection and identification.
Keep steel members off ground, using pallets, platforms or other
' supports. Protect steel members and packaged materials from erosion
and deterioration.
ID. Do not store materials on structure in a manner that might cause
distortion or damage to members or supporting structures. Repair or
replace damaged materials or structures as directed.
PART 2- PRODUCTS
2.01 MATERIALS:
A. METAL SURFACES: For fabrication of work which will be exposed to
view, use only materials which are smooth and free of surface blemishes
including pitting, seam marks, roller marks, rolled trade names and
' roughness. Remove such blemishes by grinding, or by welding and
grinding, prior to the cleaning, treating and application of surface finishes.
' 05120-3
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B. STRUCTURAL STEEL SHAPES, PLATES AND BARS: ASTM A 36,
except where other type steel is indicated. '
C. COLD -FORMED STEEL TUBING: ASTM A 500, Grade B.
D. HOT -FORMED STEEL TUBING: ASTM A 501. 1
E. STEEL PIPE: ASTM A 53, Type E or S, Grade B. Finish: Black, except
where indicated to be galvanized. I
F. STEEL CASTINGS: ASTM A 27, Grade 65-35, medium -strength carbon '
steel.
G. HEADED STUD -TYPE SHEAR CONNECTORS: ASTM A 108, Grade
1015 or 1020, cold finished carbon steel; with dimensions complying with
AISC Specifications.
H. ANCHOR
BOLTS: ASTM A 307,
nonheaded type or ASTM A136
unless
otherwise
indicated.
UNFINISHED THREADED FASTENERS: ASTM A 307, Grade A, regular
low -carbon steel bolts and nuts.
1. Provide hexagonal, heads and nuts for all connections.
J. HIGH
-STRENGTH THREADED
FASTENERS: Heavy
hexagon structural
bolts,
heavy hexagon nuts, and
hardened washers, as
follows.
1. Quenched and tempered, Type 1, medium -carbon steel bolts, nuts
and washers, complying with ASTM A 325.
K. ELECTRODES FOR WELDING: Comply with AWS Code.
L. STRUCTURAL STEEL PRIMER PAINT: Fabricator's standard
rust -inhibiting primer.
M. METALLIC SHRINKAGE -RESISTANT GROUT:
1. Pre -mixed factory -packaged ferrous aggregate grouting compound.
N. NON-METALLIC SHRINKAGE -RESISTANT GROUT:
1. Pre -mixed, non-metallic, non -corrosive, non -staining product
containing selected silica sands, portland cement, shrinkage
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compensating agents, plasticizing and water reducing agents,
complying with Corps of Engineers CRD-C621.
2.02 FABRICATION:
A. SHOP FABRICATION AND ASSEMBLY:
1. Fabricate and assemble structural assemblies in shop to greatest
extent possible. Fabricate items of structural steel in accordance
with AISC Specifications and as indicated on final shop drawings.
Provide camber in structural members where indicated.
2. Properly mark and match -mark materials for field assembly.
Fabricate for delivery sequence which will expedite erection and
minimize field handling of materials.
' B. CONNECTIONS:
1. Weld or bolt shop connections, as indicated.
II 2. Bolt field connections, except where welded connections or other
connections are indicated.
3. Provide high -strength threaded fasteners for principal bolted
connections, except where unfinished bolts are indicated.
4. Provide unfinished threaded fasteners for only bolted connections
of secondary framing members to primary members (including
girts, and other framing members taking only nominal stresses) and
for temporary bracing to facilitate erection.
IC. HIGH -STRENGTH BOLTED CONSTRUCTION: Install high -strength
threaded fasteners in accordance with AISC "Specification for Structural
Joints using ASTM A 325 or A 490 Bolts".
D. WELDED CONSTRUCTION: Comply with AWS Code for procedures,
appearance and quality of welds, and methods used in correcting welding
'
work.
E. SHEAR CONNECTORS: Prepare steel surfaces as recommended by
manufacturer of shear connectors. Shop weld shear connectors, spaced
as shown, to beams and girders in composite construction. Use
automatic end welding of headed stud shear connectors in accordance
with manufacturer's printed instructions.
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F. STEEL WALL FRAMING: Select members which are true and straight for ,
fabrication of steel wall framing. Straighten as required to provide
uniform, square and true members in completed wall framing.
G. HOLES FOR OTHER WORK:
1. Provide holes required for securing other work to structural steel
framing, and for passage of other work through steel framing
members, as shown on final shop drawings.
2. Provide threaded nuts welded to framing, and other specialty items
as indicated to receive other work. ,
3. Cut, drill, or punch holes perpendicular to metal surfaces. Do not
flame cut holes or enlarge holes by burning. Drill holes in bearing '
plates.
2.03 GALVANIZING:
A. Hot -dip galvanize structural steel members exposed to the weather.
Galvanizing shall conform to ASTM A 123 for products fabricated from
rolled, pressed, and forged steel shapes, bars; and strip. Minimum weight
of zinc coating shall be 2.0 oz. per sq. ft. for steel up to 3116" thick and
2.3 oz. per sq. ft. steel 1/4" thick and heavier. Galvanizing on hardware
shall conform to ASTM A 153. The minimum weight of zinc coating on
fasteners shall be 1.25 oz. per sq. ft.
B. All members shall be galvanized after complete fabrication.
C. Members shall be inspected for uniform galvanized coating which shall
conform to coating weights specified herein. Bare spots shall be cause
for rejecting any coated steel member. Minimal abrasions to galvanize
finish incurred in the course of erection shall be touched up with zinc rich
coating of paint.
2.04 SHOP PAINTING: This section does not apply.
PART 3- EXECUTION
3.01 ERECTION:
A. SURVEYS: Employ a surveyor, experienced in surveying work, to
establish permanent bench marks as necessary for accurate erection of
structural steel. Check elevations of concrete and masonry bearing
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' surfaces, and locations of anchor bolts and similar devices, before
erection work proceeds, and report discrepancies to Structural Engineer.
' Do not proceed with erection until corrections have been made, or until
compensating adjustments to structural steel work have been agreed
upon with Engineer.
B. TEMPORARY SHORING AND BRACING: Provide temporary shoring
and bracing members with connections of sufficient strength to bear
imposed loads. Remove temporary members and connections when
permanent members are in place and final connections are made.
Provide temporary guy lines to achieve proper alignment of structures as
' erection proceeds.
C. TEMPORARY PLANKING: Provide temporary planking and working
platforms as necessary to effectively complete work.
D. ANCHOR BOLTS:
1. Furnish anchor bolts and other connectors required for securing
' structural steel to foundations and other in -place work.
2. Furnish templates and other devices as necessary for presenting
bolts and other anchors to accurate locations.
E. SETTING BASES AND BEARING PLATES:
t1. Clean concrete and masonry bearing surfaces of bond -reducing
materials and roughen to improve bond to surfaces. Clean bottom
surface of base and bearing plates.
2. Set loose and attached base plates and bearing plates for
' structural members on wedges or other adjusting devices.
3. Tighten anchor bolts after supported members have been
' positioned and plumbed. Do not remove wedges or shims, but if
protruding, cut off flush with edge of base or bearing plate prior to
packing with grout.
4. Pack grout solidly between bearing surfaces and bases or plates to
ensure that no voids remain. Finish exposed surfaces, protect
installed materials, and allow to cure. No superimposed loads may
be placed on bases or plates until grout has cured.
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5. For proprietary grout materials, comply with manufacturer's '
instructions.
F. FIELD ASSEMBLY:
1. Set structural frames accurately to lines and elevations indicated.
Align and adjust various members forming a part of a complete
frame or structure before permanently fastening. Clean bearing
surfaces and other surfaces which will be in permanent contact . i
before assembly. Perform necessary adjustments to compensate
for discrepancies in elevations and alignment.
2. Level and plumb individual members of structure within specified
AISC tolerances.
3. Splice members only where indicated and accepted on shop
drawings.
4. Comply with AISC Specifications for bearing, adequacy of
temporary connections, alignment, and removal of paint on
surfaces adjacent to field welds.
5. Do not enlarge unfair holes in members by burning or by use of
drift pins, except in secondary bracing members. Ream holes that
must be enlarged to admit bolts.
G. GAS CUTTING: Do not.use gas cutting torches in field for correcting 1
fabrication errors in structural framing. Cutting will be permitted only on
secondary members which are not under stress, as acceptable to 1
Engineer. Finish gas -cut sections equal to a sheared appearance when
permitted.
3.02 QUALITY CONTROL:
A. The Contractor shall engage an independent testing and inspection
agency approved by the Engineer to inspect high -strength bolted
connections and welded connections and to perform tests and prepare.
test reports. All services performed by the testing agency shall be paid
for by the Contractor.
1. Testing agency shall conduct and interpret tests and state in each 1
report whether test specimens comply with requirements, and
specifically state any deviations therefrom.
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2. Provide access for testing agency to places where structural steel
work is being fabricated or produced so that required inspection
' and testing can be accomplished.
3. Testing agency may inspect structural steel at plant before
' shipment; however, Engineer reserves right, at any time before
final acceptance, to reject material not complying with specified
requirements.
B. Correct deficiencies in structural steel work which inspections and
laboratory test reports have indicated to be not in compliance with
' requirements. Perform additional tests, at Contractor's expense, as may
be necessary to reconfirm any non-compliance of original work, and as
may be necessary to show compliance of corrected work.
' C. SHOP BOLTED CONNECTIONS: Inspect or test in accordance with
AISC specifications.
D. SHOP WELDING: Inspect and test during fabrication of structural steel
assemblies, as follows.
1. Certify welders and conduct inspections and test as required.
' Record types and locations of defects found in work. Record work
required and performed to correct deficiencies.
I2. Perform visual inspection of all welds.
3. Perform tests on 100% of full and partial penetration welds as
' follows. Inspection procedures listed are to be used at the option
of the Testing Agency.
' a. Liquid Penetrant Inspection: ASTM E 165.
b. Magnetic Particle Inspection: ASTM E 709; performed on
root pass and on finished weld. Cracks or zones of
incomplete fusion or penetration not acceptable.
c. Radiographic Inspection: ASTM E 94 and ASTM E 142;
minimum quality level "2-2T'.
' d. Ultrasonic Inspection: ASTM E 164.
E. FIELD BOLTED CONNECTIONS: Inspect in accordance with AISC
specifications.
' 05120-9
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F. FIELD WELDING: Inspect and test during erection of structural steel as
follows.
1. Certify welders and conduct inspections and tests as required.
Record types and locations of defects found in work. Record work
required and performed to correct deficiencies.
2. Perform visual inspection of all welds.
3. Perform tests on 100% of full and partial penetration welds as
follows.
a. Liquid Penetrant Inspection: ASTM E 165.
b. Magnetic Particle Inspection: ASTM E 709; performed on
root pass and on finished weld. Cracks or zones of
incomplete fusion or penetration not acceptable.
c. Radiographic Inspection: ASTM E 94 and ASTM E 142;
minimum quality level "2-2T'.
d. Ultrasonic Inspection: ASTM E 164.
END OF SECTION
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GENERAL MECHANICAL REQUIREMENTS
SECTION 15010
' PART1-GENERAL
1.01 RELATED DOCUMENTS:
A. Comply with the Conditions of the Contract, General and Supplementary
' Conditions, and any other applicable requirements contained herein or issued
under separate cover.
B. Perform other work related to or necessary for the mechanical installation in
accordance with the applicable Specification Division or Section contained herein.
C. In Mechanical Specification Sections, items under "RELATED WORK" are listed
for convenience only and are not guaranteed to be a complete listing of all
applicable work.
' 1.02 CODES, REGULATIONS AND STANDARDS:
A. Comply with the latest edition of applicable codes including the following:
1. Standard Building Code
' 2. Arkansas State Plumbing Code
3. Arkansas State Gas Code
4. Life Safety Code (NFPA 101)
' 5. National Electrical Code (NFPA 70)
6. Arkansas State Fire Prevention Code
7. Arkansas Gas Pipeline Code
B. Comply with applicable Regulations as amended, including the following:
1. Arkansas State Department of Health Regulations
2. 1994 Arkansas Rules and Regulations for Energy Efficiency Standards for
1 New Building Construction
3. Arkansas Department of Labor Regulations
4. Occupational Safety and Health Act (OSHA)
' 5. Utility Company Regulations and Requirements
6. Other State and Federal Laws and Regulations
7. Local Ordinances
' C. Furnish products and perform installation conforming to the latest accepted
Standards published by the following organizations:
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1. Underwriter's Laboratories, Inc. (UL)
2. National Fire Protection Association (NFPA)
3. National Electrical Manufacturer's Association (NEMA)
4. American Society of Testing Materials (ASTM)
5. American National Standards Institute (ANSI)
6. Air Movement and Control Association (AMCA)
7. American Society of Heating, Refrigerating and Air Conditioning Engineers
(ASHRAE)
8. American Society of Mechanical Engineers (ASME)
9. American Water Works Association (AWWA)
10. American Refrigeration Institute (ARI)
11. American Gas Association (AGA)
12. Cast Iron Soil Pipe Institute (CISPI)
13. Midwest Insulation Contractors Association (MICA)
14. Sheet Metal and Air Conditioning Contractor's National Association
(SMACNA)
15. Insurance Service Office (ISO)
16. Factory Insurance Association (FIA)
17. Factory Mutual (FM)
18. Institute of Boiler and Radiator Manufacturers (IBR)
19. National Environmental Balancing Bureau (NEBB)
20. Associated Air Balance Council (AABC)
21. American Society of Sanitary Engineers (ASSE)
22. Plumbing and Drainage Institution (PDI)
23. National Sanitation Foundation (NSF)
D. In case of discrepancy or conflict between Codes, Regulations, Standards,
Drawings and/or Specifications, the requirement yielding the higher(est) quality of
work shall govern. ,
1.03 ADMINISTRATIVE FEES:
A. Obtain and maintain all necessary licenses, permits and inspections and pay all
fees including taxes and penalties, if any, required by the Administrative Authority. ,
Refundable deposits will be paid by the Owner.
1.04 PRE -CONSTRUCTION SUBMITTALS:
A. Submit for approval, Manufacturer's technical data sheets including performance
specifications for all equipment and air devices shown on the schedules. Also
provide data on all system accessories and all materials. Include all ' piping,
ductwork and insulation materials. Accessories to be submitted' on shall include
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' valves and all piping accessories, and all duct accessories including extractors,
turning vanes, control dampers and balancing dampers.
' B. Submit for approval, Contractors original Shop Drawings of all assemblies of
manufactured items including control diagrams. Submit all items called out in
' individual sections, in addition to those called for in this section.
C. Indicate all pertinent dimensions on scale drawings necessary for clarity and or
coordination of the installation between trades.
D. Provide complete electrical data and wiring diagrams.
' E. Make Submittals on all work contained in Division 15, Mechanical at one time
except by special permission.
' F. Bind Submittals in durable cover(s) with contents conveniently organized and
properly indexed with index tabs.
' G. Obtain approval on product manufacturers not specifically named prior to making
submittals.
H. Each Mechanical Section contains a listing of required Submittals only for
convenience.
tI. Submit for approval a schedule of nameplates and manufacturers data sheets and
Shop Drawings on special supports and seals.
J. Provide performance data on all substituted items to demonstrate equality to those
scheduled. Include all sound level, rpm, velocity and other data as it is applicable.
K. Submit proposed changes in ducts, pipes or equipment lay out before ordering or
fabrication as stated below under "Intent".
1.05 INTENT:
A. It is intended that the Contractor provide a complete and operating mechanical
system including all incidental items, and connections necessary for proper
operation or customarily included even though each and every item may not be
'indicated.
B. The Drawings indicate the general layout requirements for equipment, fixtures,
piping, ductwork, etc. Final layout will be governed by actual field conditions with
all measurements verified at the site. Contractor shall verify that all equipment,
1 15010-3
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ducts, pipes and all other components will fit in the space provided before
fabrication or ordering. Contractor shall submit any proposed changes to the
Engineer for approval before ordering or fabrication.
C. It is intended that the mechanical installation be safe, reliable energy, efficient, and
easily maintained with adequate provisions allowed for access to equipment.
D. It is intended that the mechanical system operate quietly with noise levels below
the criteria recommended for the application by ASHRAE. Provide corrective
action as required to reduce objectionable noise or vibration.
PART 2 -PRODUCTS
2.01 PRODUCT REQUIREMENTS:
A. Furnish only new standard products of a manufacturer regularly engaged in the '
production of said products.
B. Support all products by service organizations with adequate spare parts inventory
and personnel located reasonably close to the site.
C. Where multiple units of the same=type or class of products are required, provide all
units of the same manufacturer.
2.02 PRODUCT HANDLING:
A. Store products in the original containers and shelter in a suitable environment at
an approved location. Make readily accessible for inspections and inventory
accounting.
2.03 PRODUCT SUBSTITUTIONS:
A. For products specified by generic reference standard, select any product meeting r
such standard.
B. For products specified by naming one or more products or manufacturers, select 1
any named. Submit request, in writing, for substitution of any product or
manufacturer not specifically named and obtain approval at least five working days '
prior to bid date.
C. Provide all information required to support claim of "equality" of product proposed
for substitution. Substitutions will be considered only if equivalent in quality,
efficiency, performance, size, weight, reliability, appearance, and ease of
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maintenance to the specified product or manufacturer.
D. Where approved product substitutions alter the design, space requirements,
electrical requirements, connections, or etc., include all work necessary to provide
a complete installation of quality equal to or better than that which would have
been achieved with products or manufacturers as specified.
2.04 MECHANICAL IDENTIFICATION:
', A. Identify each major component as to manufacturer's name, address, model
number, serial number, and pertinent ratings on a durable plate attached to the
' component in a conspicuous place.
B. Identify each major component as it is named on the Drawings or referred to
' herein with engraved nameplates made from laminated plastic sheets.
1. Furnish with white letters on black background except for other color coded
• requirements.
2. Provide appropriate size nameplates with information easily readable.
3. Submit for approval, a schedule of nameplates to be affixed to each major
' component.
4. Attach nameplates with approved adhesive on factory baked enameled
surfaces only. Attach nameplates with proper screws on field painted and
' all other surfaces.
C. For hydronic systems only:
1. Identify each valve, except obvious equipment isolation valves, with black
filled coded numbers engraved on 1-1/2" diameter brass nametag attached
with brass jack chain. Provide typewritten legend of numbered valves.
Frame under glass and mount on the wall where directed. Include at least
the following information in the legend:
a. Fluid conveyed
b. Function of valve or area affected
c. Normal position (s)
d. Emergency instructions where appropriate
' e. Location of the valve
2. Identify each pipe or duct exposed in equipment rooms or accessible above
lay -in ceiling or behind access doors with permanent markers as
manufactured by Seton or Brady. Indicate fluid conveyed and direction of
flow. Install on each ppe or duct where it enters or leaves a wall or floor and
15010-5
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at other intervals not to exceed 20 feet. I
D. Identify outdoor underground lines with continuous strip of plastic utility maker tape
s manufactured by Seton stating at regular intervals " CAUTION 9 state utility)
PIPE BELOW". Install one foot directly above pipe before backfilling to grade
2.05 ANCHORS:
A. Size anchors for minimum safety factor of two times recommended load. Use only
corrosion resistant materials.
B. In new concrete, use malleable iron inserts set prior to pouring concrete.
C. In existing concrete or solid masonry, use Phillips "Redhead" expansion shields or
Elcen self drilling expansion shields. Use power driven fasteners only for light
loads and with specific approval.
I
D. In hollow masonry, use steel toggle bolts.
E. On structural steel, use approved beam clamps or direct weld.
F. In wood, use wood screws or lag screws or through bolt with nuts and washers.
G. In sheet metal, use self tapping sheet metal screws or machine bolts with washers
and nuts.
•H. In bar joists, use hanger rod between bottom angles secured with washers and
nuts.
2.06 HANGERS AND SUPPORTS: ,
A. Generally, support piping in accordance with ANSI B31.1 and support ducts in '
accordance with SMACNA duct construction standards.
B. Support horizontal steel and copper pipe as follows:
1. For pipe sizes 2" and smaller, use adjustable wrought steel ring or clevis
hanger spaced at 5 feet on center with 3/8" steel hanger rod.
2. For pipe sizes 2-1/2" through 4", use adjustable wrought steel clevis spaced
at 10 feet on center with 5/8" steel hanger rod.
3. Support high temperature pipe with pipe roller hangers to allow for
expansion.
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' C. Support cast iron soil pipe 4" and smaller with adjustable wrought steel ring or
clevis hanger spaced at 5 feet on center with 5/8" steel hanger rod.
D. Support PVC pipe with approved hangers at 4 feet on center.
E. Provide trapeze hangers consisting of steel angles or channels with spacers and
steel hanger rods for multiple piping or duct runs.
F. Provide copper plated hangers if in contact with copper piping.
G. Provide 18 gauge galvanized saddles for insulated pipe and size hanger to
accommodate pipe and insulation.
' H. Use steel riser clamps for vertical piping support through floors. Provide steel
' bracket and wrought steel clamp for support from walls.
I. Support ducts with steel bands, steel angles, or steel channels near each
transverse joint.
J. Support piping on roof with 4"x4"x2' redwood blocks with wooden saddle formed to
fit pipe and nailed to block. Loosely clamp pipe to saddle with steel straps.
1 2.07 CONCRETE BASES:
A. Provide concrete bases for floor mounted equipment indicated on the Drawings
and all exterior equipment mounted on grade. Use proper cement -sand mix to
achieve strength of 3000 psi after 28 days.
B. Provide steel reinforcing bars as required and provide proper ties and support
during pouring.
C. Establish sizes of bases required to accommodate equipment. Generally, make
bases extend 3" larger than equipment.
D. Provide properly sized anchor bolts held in position with templates. Where anchor
bolts cannot be held in sufficient alignment, provide adjustable bolts in pipe
sleeves.
E. Prior to pouring, set steel re -bar dowels in holes drilled in existing slab for proper
' anchorage of base. Install near each corner and at other intervals not to exceed
24 inches.
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F. Trowel finish and rub smooth. Form edges with 3/4" chamfer.
G. Grout bases for pumps and other vibrating equipment with non -shrink grout. '
2.08 SLEEVES:
A. For pipes or round ducts through dry floors above grade or interior walls, form
sleeves with 18 gauge galvanized sheet metal. Sleeves are not required in non
fire rated dry wall construction nor slab on grade.
B. For pipes through outside walls, firewalls, concrete beams, footings or potentially
wet floors, provide schedule 40 galvanized steel pipe sleeves. Provide integral
waterstop in outside wall sleeves.
C. For rectangular ducts through walls or floors, form sleeves with steel angles or '
channels or galvanized sheet metal.
D. Extend sleeves through floors one inch above floor and seal watertight. For core
drilled penetrations in existing floors, provide one inch angle rings set in sealant in
lieu of sleeves. Make wall sleeves flush with wall.
E. Size sleeves to allow for movement due to expansion and to provide for pipe
insulation run continuous through sleeves.
F. Where pipes or ducts pass through sleeves, completely fill space with insulation or
approved fire barrier materials. Provide tight fitting escutcheon plates on both ,
sides of wall sleeves as follows:
1. Galvanized sheet metal caps for ducts. ,
2. Galvanized or cad plated plates for pipes in mecha• nical spaces or
unfinished areas.
3. Chrome plated brass for pipes in finished areas. ,
2.09 FLASHING AND SEALS:
A. Where piping penetrates roof membrane, provide 30 inch square sheet of 5th/sq.
ft. lead or 18 gauge copper. Extend flashing into top of open vent pipes one inch
or provide flashing assembly or pitch pan as recommended by roofing
manufacturer.
B. Flash floor drains, except in slab on grade, with copper sheet flashing. Extend '
flashing under tile or floor finish to 6 inches up wall in showers or 2 feet from floor
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' drain. Clamp flashing to auxiliary drain collar on floor drain.
C. Provide curbs for all roof mounted equipment. Make curbs minimum of 4 inches
'
above flood level of roof. Flash and counter flash with galvanized sheet metal,
soldered and properly waterproofed.
' D. Where piping penetrates outside walls, make watertight with oakum and sealant or
provide modular rubber seal designed for the purpose.
' PART 3- EXECUTION
' 3.01 MANUFACTURER'S DIRECTIONS:
A. Handle, install, connect, test, and operate all products, assemblies, and systems in
accordance with manufacturer's recommendations.
B. In case of conflicting requirements between the manufacturer's directions and the
Contract Documents, obtain instructions before proceeding with the work.
3.02 INSPECTIONS:
A. Arrange with the Administrative Authority for inspections of all work required and
obtain approval prior to concealing or proceeding with the work.
' B. Give adequate notice before concealing any work for inspections by the Architect
or Owner's representatives. Obtain instructions to proceed before concealing the
' work.
I
' 3.03 CLEANING:
A. Keep the premises clean and free from debris, dirt, etc.
B. Upon completion of the work, clean and polish all fixtures, equipment, etc.
3.04 WORKMANSHIP:
A. Perform all work in accordance with the best practices of the trade and provide a
"neat" installation by mechanics skilled in their respective trades and properly
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licensed.
B. Accurately install piping, ductwork, and other equipment, plumb, level, and true to
line with runs parallel or perpendicular to building lines. Make bends or offsets
uniform.
C. Carefully perform all cutting, drilling, digging, etc., and patch or refinish the
disturbed area to the condition of adjoining or similar surfaces in an approved
manner. Do not cut any structural member without specific approval. Do not cut
any electrical or mechanical lines that may be concealed.
D. Conceal piping, ductwork, etc. in chases, furrings, or above ceilings unless
indicated otherwise. Flush mount equipment required in finished walls where
possible.
3.05 FLAME AND SMOKE CONSIDERATIONS:
A. In ducts or other enclosures used for transporting environmental air, including
return air plenums above ceilings, use only products conforming to NFPA and UL
composite classifications not exceeding 25 for flame spread and 50 for smoke
developed ratings. This requirement applies to all materials including adhesives,
finishes, etc.
B. Completely seal penetrations through fire and/or smoke rated walls, ceilings,
floors, or other barriers for the passage of piping, ductwork, etc. with a UL listed
material to preserve the fire/smoke rating of the barrier.
C. Provide approved fire dampers in air ducts penetrating fire barriers requiring a fire
construction rating greater than one hour. Maintain access to fire dampers fusible
link.
3.06 FAN SHUTDOWN CONTROLS:
A. Provide fan shutdown controls smoke detector in the return of u nits below 2000
CFM. The detector shall be installed prior to mixing with outside air. Provide smoke
detector in supply of units greater than 2000 CFM. If the entire area served by the
unit is not protected by smoke detectors, then provide a smoke detector in the
return also of units greater than 2000 CFM. The smoke detectors shall shut the
unit down.
B. For system greater than 15000 CFM serving more than one floor, provide smoke
detector at each floor in return air duct prior to connect to the common return duct
and prior to connection any outside air duct.
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C. If the building contains a fire alarm system, the smoke detectors shall also signal
the fire alarm panel. If the building does not contain a fire alarm system, then
'remote indicators shall be provided in a readily visible location.
D. Mechanical contractor shall install the smoke/fire detector in the ductwork as
'
appropriate, the controls contractor shall wire the detector to shut the unit down,
and the fire alarm contractor shall wire detector to his own system.
E. In exhaust only systems, the smoke detectors shall not be required.
3.07 COORDINATION:
A. Coordinate the mechanical work with the work of related trades to avoid
interference's. Determine the exact route of piping and ductwork prior to
' fabrication and the exact location of each outlet and equipment connection prior to
installation.
B. Study the Architectural, Structural, Mechanical and Electrical Drawings, and
Specifications including Shop Drawings and manufacturer's technical data sheets,
and compare to actual site conditions and constraints. In case of conflicts or
interference, obtain clarification or instructions before performing any work.
C. Piping or equipment requiring slope or specific mounting elevations will generally
have right of way over products whose elevations can be changed.
D. Carefully plan the sequence of work as required to minimize disruptions and
installation time.
3.08 EQUIPMENT CONNECTIONS:
A. Make all required utility connections to each item of equipment shown or specified
including equipment furnished by Owner, and make operational.
B. Connect overflows, relief discharges, blowdowns, drain valves, etc. with approved
piping and extend to floor drains or other approved discharge points.
' C. Make all electrical connections to equipment including power supply and control
wiring in accordance with Division 16, Electrical.
3.09 PROTECTION REQUIREMENTS:
A. Locate existing utility lines and adequately identify and protect during the execution
of the work.
1 15010-11
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HVAC RENOVATION
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CITY OF FAYETTEVILLE
B. Protect public and private property against damage.
C. Protect all work including building finishes against damage due to dirt, water,
chemicals, frost, heat, handling, theft, etc. Keep openings in piping and ductwork
and equipment closed with suitable plugs or caps during installation. ,
D. Provide necessary warning devices, barricades, or coverings required for safety
around moving parts, sharp objects or high temperature surfaces.
3.10 CHASES AND OPENINGS:
A. Provide templates or details for chases and other openings 'required through '
floors, walls, ceilings, etc. to accommodate piping or ductwork.
3.11 TRENCHING AND BACKFILLING:
A. Excavate bottoms of trenches to required depth and grade for proper slope with ,
uniform and solid bearing for piping. Do not lay pipe on mud, rocks, or unstable
soil. Remove unsuitable bearing material and backfill to proper depth with sand or
other approved material. If limestone products are used, protect all copper piping ,
from contact with the limestone using sealed insulation or approved sleeving
material.
B. After piping has been satisfactorily leak tested and approved, backfill trench to a
depth of one foot above top of pipe with sand or fine pea gravel. Install continuous.
strip of plastic "CAUTION" tape over pipe and sand. Use suitable material for ,
remaining backfill to finished grade, tamped to 95% compaction.
C. Before beginning any trenching, locate and determine elevation of all affected
piping. Verify that drain lines to be connected to are deep enough to allow
sufficient slope before starting trenching.
3.12 PIPING INSTALLATION:
A. Erect piping without forcing or springing and allow for proper clearance and ,
headroom.
B. Provide for expansion and contraction with piped loops, changes in direction, or ,
approved expansion couplings.
C. Install all piping in a manner to prevent freezing. If necessary to install water '
piping in unheated spaces or outdoors above the frost line, provide electric heat
15010-12 1,
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
tracing around pipe prior to insulating.
3.13 PAINTING:
A. Paint ductwork, piping, equipment, etc. exposed in finished areas to match
adjacent surfaces as directed. Paint items flat black or as directed if visible
through grilles or other openings.
B. Paint all exposed piping and equipment in mechanical spaces for uniform
appearance or identification as directed.
C. Paint ferrous piping, equipment, hangers, etc. exposed outdoors or subject to
rusting, with one coat primer and two coats of approved exterior enamel based
paint.
D. Paint roof mounted and other outdoor equipment to uniformly match background
or adjacent surfaces as directed.
' E. Paint plywood backboards used for mounting equipment.
3.14 TESTING, ADJUSTING, AND BALANCING:
A. After systems are completed and fully operational, perform Testing, Adjusting, and
1 Balancing (TAB) in accordance with procedures recommended in ASHRAE
Systems volume, AABC Standards, and NEBB Standards on the following
systems:
1. Supply Air System
2. Return Air System
' 3. Exhaust Air System
4. Outside Air System
' B. Furnish all test equipment, tools and instrumentation required for TAB. Submit
proof of calibration when required.
C. Before beginning TAB, submit forms to be used to the Engineer for approval or
use the attached forms.
' D. Adjust fan speeds, dampers, valves, and other controls to achieve design ratings.
Balance each air device or valve to within plus or minus 10 percent of indicated
flow rates. Perform TAB for each possible mode of operation.
E. Notify Engineer 24 hours prior to taking final readings and arrange for Engineer to
15010-13
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CITY OF FAYETTEVILLE
be present for final readings. '
F. Obtain and record all measurements required for final TAB report. Include at least
the following data:
1. Running amperes and voltage at each motor 3/4 horsepower or larger. '
Indicate rpm and direction of rotation.
2. Air flow rates (cfm) at each supply air outlet, return and outside air intake.
3. Dry bulb air temperatures in each conditioned space and at entrance and
exit of all coils with corresponding outside air temperature. Record
refrigerant pressures at the same time.
4. Static pressures in each control zone relative to outdoors and across each
fan, air filter, major component, and major duct run.
G. TAB shall be performed by a qualified TAB specialist approved by the Engineer.
3.15 POST CONSTRUCTION SUBMITTALS:
A. Deliver special tools, lubricants, and other products necessary for, proper operation
and maintenance of the mechanical systems.
B. Deliver spare parts as called for under other Mechanical Sections contained herein
or on the Drawings.
C. Submit Project Record Documents indicating all changes from the Contract
Documents made during construction.
D. Submit Certificates of Final Inspections from the Administrative Authority.
E. Submit Operation and Maintenance Manuals covering all phases of equipment ' I
and systems provided. Include complete spare parts data with current prices and
sources of supply. Include copy of manufacturing data sheets and shop drawings
required in pre -construction submittals. '
F. Submit extended warranties in excess of the standard one year warranty where '
required by other Mechanical Sections contained herein or on the Drawings.
G. Submit TAB report on approved record forms.
3.16 INSTRUCTIONS TO OWNER:
A. Provide competent instruction to Owner's personnel covering operation and '
maintenance of all mechanical systems. Provide specialized instruction by
15010-14
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II I HVAC RENOVATION
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CITY OF FAYETTEVILLE
VIBRATION ISOLATION
SECTION 15240
PART 1 -GENERAL
' 1.01 WORK INCLUDED:
IA. Vibration isolators
1.02 RELATED WORK:
A. Section 15510 Hydronic Piping System
B. Section 15860 Fans
1.03 REFERENCE STANDARDS:
A. Provide and install mechanical equipment so that Average Noise Criteria
Curves, as outlined in ASHRAE Guide, are not exceeded.
' 1.04 SHOP DRAWINGS:
A. Submit shop drawings in accordance with Section 15010.
B. Vibration isolation shop drawings shall show isolator locations, load on each
'isolator, inertia slab dimensions, and include installation instructions.
1.05 INSPECTION:
A. Provide inspection services by vibration isolation equipment and materials
' manufacturer's representative for final installation is in accordance with
specifications and manufacturers recommendations.
PART 2 -PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS:
A. Manufacturer and Type: Mason Industries.
B. Other Acceptable Manufacturers: Related Equipment Manufacturers.
' 15240-1
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CITY OF FAYETTEVILLE
C. Substitutions: Items of same function and performance are acceptable in
conformance with Section 15010.
2.02 VIBRATION ISOLATORS:
A. Double deflection neoprene mounting shall have a minimum, static
deflection of 0.35". All metal surfaces shall be neoprene covered to avoid
corrosion and have friction pads both top and bottom so they need not be
bolted to the floor. Bolt holes shall be provided for these areas where
bolting is required. On equipment such as small vent sets and close
coupled pumps, steel rails shall be used above the mountings to
compensate for the overhang. Mountings shall be type ND or rails type
DNR as manufactured by Mason Industries, Inc.
B. Spring type isolators shall be free standing and laterally stable without any
housing and complete with 1/4" neoprene acoustical friction pads between
the baseplate and the support. All mountings shall have leveling bolts that
must be rigidly bolted to the equipment. Spring diameters shall be no less
than 0.8 of the compressed height of the spring at rated load. Springs shall
have a minimum additional travel to solid equal to 50% of the rated
deflection. Submittals shall include spring diameters, deflections,
compressed spring height and solid spring height. Mountings shall be type
SLF as manufactured by Mason Industries, Inc.
C. Vibration hangers shall contain a steel spring and 0.3" deflection neoprene
element in series. The neoprene element shall be molded with a rod
isolation bushing that passes through the hanger box. Spring diameters
and hanger box lower hole sizes shall be large enough to permit the hanger
rod to swing through a 30° arc before contacting the hole and short
circuiting the spring. Springs shall have a minimum additional travel to solid
equal to 50% of the rated deflection. Submittals shall include a scale
drawing of the hanger showing the 30" capability. Hangers shall be type
30N as manufactured by Mason Industries, Inc.
PART 3 - EXECUTION
3.01 INSTALLATION:
A. Install vibration isolators for mechanical motor driven equipment.
B. Provide spring hangers on piping connected to isolated equipment as
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follows: up to 4 inches diameter, first 3 points of support; 5 inches to 8
inches diameter, first 4 points of support; 10 inches diameter and over, first
6 points of support. Static deflection of first point shall be twice deflection of
isolated equipment.
C. Provide spring hangers for all suspended motor driven equipment.
D. Provide spring isolators for all motor driven equipment not located on slab
on grade applications.
END OF SECTION
15240-3
HVAC RENOVATION
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CITY OF FAYETTEVILLE
MECHANICAL INSULATION
SECTION 15250
PART 1 - GENERAL
1.01 WORK INCLUDED:
A.
Above ground domestic water piping insulation
B.
Interior air duct accoustical/thermal liner
C.
Exterior duct wrap insulation
D.
Refrigerant piping insulation
E.
Cooling condensate drain insulation
1.02
RELATED WORK:
A.
Section 15010 General Mechanical Requirements
B.
Section 15412 Domestic Water Piping System
C.
Section 15890 Low Pressure Ductwork and Accessories
1.03
SUBMITTALS:
A.
Submit Manufacturer's Data Sheets on each type of insulation to be used.
1.04
QUALITY ASSURANCE:
A.
Perform installation in accordance with MICA, Commercial and Industrial Insulation
Standards.
B.
Follow manufacturer's directions on adhesive application, fastener spacing, etc.
PART
2-
PRODUCTS
2.01
MATERIALS:
A.
Glass fiber type equal to Owens-Corning Fiberglass 23ASJ\SSL for 1/2" and
greater thickness.
15250-1
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CITY OF FAYETTEVILLE
1. K -factor no greater than 0.24
2. Jacket permeance no greater than 0.02 perms.
3. Self sealing laps on longitudinal and transverse joints of all service jacket.
4. J -M "Zeston" PVC fitting covers over Fiberglass inserts for valves and
fittings. Provide 25/50 flame/smoke rating when used in air plenums.
1
B. Flexible elastomeric pipe insulation equal to Armstrong "Armaflex" for 1!2" and less t
thickness.
1. Use proper adhesive.
2. Use sheets cut and molded around valves and fittings.
3. Do not use in air plenums unless 25/50 flame/smoke rated.
C. Acoustical Fiberglass interior duct liner with 1-1/2 lb. density and coated face.
Meet UL 181 on erosion tests and NFPA 90A on flame/smoke rating.
D. Flexible Fiberglass exterior duct wrap equal to FRK-25.
1. K -factor no greater than 0.3.
2. 3/4 lb. density.
3. Foil reinforced kraft (FRK) vapor barrier.
E. Foam/vinyl safety covers for drains & supply lines equal to Plumberex "Handy -
Shield."
1. White vinyl cover over insulating foam liner.
2. Locking strap with recloseable sealing strips and weep seam.
3. Meet Federal Std. 4.19.4 GSA and ANSI Al 17-1-1980.
PART -3- EXECUTION
3.01 INSTALLATION:
A. Successfully perform all leak tests prior to applying insulation.
B. Provide aluminum sheet metal jacket over insulation exposed outdoors above
grade. Use rivets and seal joints watertight.
C. Provide approved coating of mastic over piping insulation jackets installed
underground and make waterproof and puncture resistant.
D. Insure surfaces are clean and dry prior to installing insulation.
15250-2
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CITY OF FAYETTEVILLE
E. Neatly finish insulation at hangers or other protrusion. Seal vapor barrier joints in
duct wrap with FRK duct tape.
IF
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Ducts 18" upstream and 30" downstream from electric resistance and fuel burning
heaters located within duct system will be wrapped externally with fiberglass duct
wrap. (See Specification Section 15250, Mechanical Insulation Part 2-2.01-D)
All supply and return air systems installed in any unconditioned space shall be
insulated with a minimum of 2" thickness, 34 density wrap, or 1" thickness, 1-1/2 lb
density liner.
3.02 INSULATION SCHEDULE: SEE PLANS
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15250-3
HVAC RENOVATION
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DOMESTIC WATER PIPING SYSTEM
SECTION 15412
PART I - GENERAL
1.01 WORK INCLUDED:
A. Water Service Piping
B. Hot and Cold Water Piping
C. Temperature and Pressure (T&P) Relief Piping
D. Valves
E. Shock Suppressors
1.02 RELATED WORK:
A. Section 15010 General Mechanical Requirements
B. Section 15250 Mechanical Insulation
C. Section 15440 Plumbing Fixtures and Trim
1.03 SUBMITTALS:
A. Submit manufacturer's data sheets on valves and shock suppressors.
B. Submit list of piping products to be used and state their manufacturers, classes or
types, and other applicable data.
C. Submit Shop Drawings of shock suppressors layout proposed.
D. Submit record drawings indicating actual location and routing of installed piping.
E. Submit certificate of completion of chlorination.
PART 2- PRODUCTS
2.01 PIPING:
A. For underground water service piping outside building to water meter:
15412-1
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1. ASTM B88 type as indicated on drawings hard copper tubing with wrought
copper fittings and joints made with 95-5 solder.
2. Thickness Class 50, cement lined, seal coated, hub and spigot type ductile !I
iron with joints made with rubber compression rings manufactured for the
purpose. (Optional)
B. For underground water piping inside building and to five feet outside building:
1. 1" and smaller - ASTM
B88 type as indicated
on drawings
soft copper
tubing with no fittings or
joints permitted under
slab. Make
connections
above slab using wrought
copper fittings and 95-5
solder.
2. 1-1/4" and larger - ASTM
B88 type as indicated
on drawings
hard copper
tubing with rought copper
fittings and joints make
with Sil`.Fos
Solder (15%
silver content).
C. For exposed piping in toilet rooms and other finished areas, use chrome plated
brass pipe with threaded fittings.
D. For above ground water and T&P relief piping inside building, use ASTM 888 type
as indicated on drawings hard copper tubing with wrought copper fittings and joints
made with 95-5 solder.
E. Solder containing lead shall not be used on potable water systems.
2.02 VALVES:
A. Provide valves with suitable materials including discs, plugs, balls, gaskets, linings,
and lubricants for the service, temperature, and pressure to which they will be
exposed. Furnish with solder or screwed connections.
B. Gate Valves: Bronze, non -rising stem, inside screw, double wedge.
C. Globe or Angle Valves: Bronze, rising stem, inside screw, renewable composition
disc.
D. Check Valves: Bronze with swing disc.
E. Standard Hose Bibbs (HB): Bronze, replaceable disc, hose thread outlet with
vacuum breaker.
F. Freeze
Proof Hose
Bibbs
(FPHB): 3/4" anti -siphon non -freeze type with bronze
casing
and box with
loose
key handle. Furnish for proper wall thickness.
15412-2
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ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
G. Garbage Can Wash Valve (GCWV): 3/4" non -freeze mixing type with hot and cold
water connections, bronze casing and deep box with loose key handle. Provide
vacuum breaker and furnish for proper wall thickness. Wade W -8606 -HC.
' H. Pressure Reducing Valves (PRV): Bronze with 125 psig inlet pressure and 50 psig
adjustable outlet pressure. Furnish same size as pipe.
I. Temperature and Pressure Relief Valve (T&P): Bronze with test lever. Size to
handle BTU/hr. rating of water heater.
' 2.03 SHOCK SUPPRESSORS:
A. Provide Wade "Shockstops" of all stainless steel construction with welded nested
bellows and pre -charged with nitrogen. Size and locate in accordance with
PDI-WH2O1.
' PART 3- EXECUTION
3.01 PREPARATION:
A. Ream pipes and tubing and thoroughly clean inside and outside prior to
connecting.
3.02 INSTALLATION:
' A. Slope water piping minimum of 1 inch in 40 feet and arrange to drain at all low
points.
' B. Bury all underground outside piping a minimum of 3 feet below finished grade.
C. Use electrically insulating type connections for joining dissimilar metals such as
brass valves or adapters or insulating couplings.
D. Use proper adapters for screwed valves to copper piping.
E. Use teflon tape or other approved joint compound to connect threaded pipe.
F. - Connect to T&P relief valve and extend full size to approved discharge point.
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G. Where pipe passes through finished wall, ceiling, or floor, provide chrome plated
escutcheon plate securely anchored to pipe. Install pipe so that no threads show.
' 15412-3
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CITY OF FAYETTEVILLE
H. Arrange with local utility for water tap and meter installation. Pay all costs to
establish water services. .
Install
gate valve to isolate
or shut-off
equipment or branch lines. Use globe
valves
where adjustable flow
or throttling
is required.
J. Install hose bibbs centerline, 2 feet above floor or grade. Install garbage can wash
valve 4 feet above floor or drain.
K. Provide PRV to limit maximum static pressure at plumbing fixtures to 70 psig.
Submit pressure data taken at different times as approved or install PRV at service
connection or in building. Provide PRV at other separate fixtures when shown on
Drawings.
L. Make provisions necessary to prevent cross connections with sanitary drainage
system or other non -potable sources. Provide reduced pressure type backflow
preventers when required.
3.03 TESTING:
A. Before concealing or insulating, test domestic water piping and 'prove leak free.
Subject system to minimum hydrostatic pressure of 100 psig and hold for one
hour.
3.04 STERILIZATION:
A. After tests
have been successfully
completed,
thoroughly flush and sterilize the
completed
domestic water system in
accordance
with AWWA C601.
B. Flush entire system after sterilization until residual chlorine content is no greater
than 0.2 parts per million.
C. Chlorinate only when the building is unoccupied.
END OF SECTION
15412-4
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
NATURAL GAS PIPING SYSTEM
SECTION 15413
PART I - GENERAL
1.01 WORK INCLUDED:
A. Underground natural gas service piping
B. Interior natural gas piping
C. Exterior exposed natural gas piping
D. Connectors for appliances and other equipment
E. Cocks
1.02 RELATED WORK:
A. Section 15010 General Mechanical Requirements
B. Section 15780 Packaged Combination Heating -Cooling Units
C. Section 15620 Fuel Fired Heaters
1.03 SUBMITTALS:
A. Submit manufacturer's Data Sheets on gas cocks.
B. Submit list of piping products to be used and state their manufacturers, classes or
types, and other applicable data.
C. Submit record drawings indicating actual location and routing of piping as installed.
1.04 QUALITY ASSURANCE:
A. Conform to ASME Code and applicable state regulations with all welding materials
and welding operator's qualifications. Use only operators fully qualified and
certified under the requirements of the Arkansas Gas Pipeline Code (AGPC).
PART 2- PRODUCTS
2.01 PIPING:
15413-1
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
A.
B.
C.
D.
E.
Underground piping:
1. Schedule 40 black steel or galvanized steel with malleable iron fittings or
welded joints with butt weld fittings.
2. Mill coat pipe with high density polyethylene over adhesive undercoating.
3. Wrap field joints and fittings with Republic "X-Tru-Tape" or equal per
manufacturer's recommendations.
Above ground piping:
I
1. Schedule 40 black steel or galvanized steel with malleable iron fittings or
welded joints with buttweld fittings.
Connectors for appliances and other equipment:
1. PVC coated spiral flexible brass connector with brass flared gas tubing
fittings.
Cathodic Protection - Packaged magnesium anodes.
Welding Rod - Same material as pipe. ,
2.02 GAS COCKS:
d 1 A. Iron body with brass plug and washer with screwed or flanged ends rated for 125
lb. WOG.
PART 3 - EXECUTION:
3.01 PREPARATION:
A. Ream pipes and tubing prior to connecting.
B. Remove welding slag from welded connections.
3.02 INSTALLATION: '
A. Slope natural gas piping minimum of 1 inch in 40 feet and provide minimum 12"
deep drip pocket same size as pipe, at all low points and at final connections to
equipment. Provide malleable iron removable screw -on cap on bottom of drip
pocket. '
B. Bury underground gas piping minimum of 2 feet below finished grade.
15413-2 ,
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C. Provide one or more anodes, sized for pipe size and length of underground
service.
D. Use flexible connector and gas cock for final connection to each appliance or other
gas fueled unit.
E. Provide dielectric union where piping emerges from underground.
F. Weld all connections where piping must be concealed. Provide ventilated pipe
sleeves where required.
G. Use teflon tape or other approved joint compound to connect threaded pipe.
H. Arrange with local utility for gas tap and meter installation. Pay all costs to
establish natural gas service.
I. Make sure all piping concealed in walls or other areas are properly vented. At top
of solid walls vent with opening which is 2 times the diameter of the pipe.
J. Provide ventilated pipe sleeves under all paving and other hard surfaces.
' 3.03 TESTING:
I
A. Before concealing, test natural gas piping system and prove leak free. Subject
system to at least 50 psig air pressure for 30 minutes.
' B. Check underground piping coating with a "Holiday" detector and prove free from
leakage currents through coating.
END OF SECTION
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15413-3
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H.YDRONIC SYSTEM
SECTION 15510
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Chilled and hot water heating system piping
B. All associated fittings and other accessories
C. Pumps
D. Valves
E. Air separators
F. Expansion tanks
G. Backflow preventor
H. Water Treatment
I. Glycol Solution
1.02 RELATED WORK:
A. Section 09900 Painting
B. Section 15250 Mechanical Insulation
C. Section 15711 Mechanical Draft Closed Circuit Evaporating Coolers
1.03 QUALITY ASSURANCE:
A. Welding materials and labor to conform to ASME Code and applicable state Labor
Regulations.
B. Use welders fully qualified and licensed by state authorities.
1.04 SHOP DRAWINGS:
A. Submit actual performance data on all equipment and accessories contained
15510-1
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
I
within this. section.
B. Prepare submittals in accordance with Section 15010 -- General Mechanical
Requirements.
C. Provide shop drawings drawn to scale and showing sizes and location of all piping,
equipment and accessories.
PART 2- PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS:
A. Pumps and System Accessories:
1. Amtrol
2. Bell & Gossett
3. Armstrong
4. Aurora
B. Valves:
1. Nibco
2. Crane
3. Milwaukee
4. Jenkins
5. Nordstrom
2.02 PIPE AND FITTINGS:
A. Piping:
Service
Condenser Water,
Equipment Drains
and Overflows
B. Fittings:
Material
Steel Schedule 40,
black, Type "L" hard
copper (Ref. Para.
3.03 this Section)
Steel, Schedule 40,
Galvanized, Type "L"
Hard Copper
15510-2
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IService Material Joint
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Condenser Water
Malleable iron Threaded
150 psi banded (2-1/2" &
Steel, same thick- Smaller)
ness as pipe Welded (3" &
Wrought Copper Larger) 95-5
Solder
Use factory fabricated butt weld fittings for welded steel pipes. Use long radius
elbows for steel and cast iron water piping.
2.03 UNIONS AND COUPLINGS:
' A. Size 2-1/2 inch and under: 150 psi malleable iron, bronze to iron ground joint
unions for threaded ferrous piping air tested for gas service, all bronze for copper
piping.
B. Size 3 inch and over: 150 psi forged steel slip-on flanges for ferrous piping, 150
psi bronze flanges for copper piping. Gaskets: 1/16 inch thick performed synthetic
' rubber bonded asbestos.
C. Use grooved mechanical couplings to engage and lock grooved or shouldered
' pipe ends and to allow for some angular deflection, contraction and expansion.
Couplings consist of malleable iron housing -clamps, C -shaped composition sealing
gasket and steel bolts. Use galvanized couplings for galvanized pipe.
2.04 STRAINERS:
A. Size 2-1/2 inch and under: Screwed, iron body, Y pattern with 1/32 inch stainless
• steel perforated screen.
' B. Size 3 inch to 4 inch: Flanged iron body, Y pattern with 3/64 inch stainless steel
perforated screen.
C. Size 5 inch and larger: Flanged iron body, basket pattern with 1/8 inch stainless
steel perforated screen.
' D. Screen free area minimum three times area of inlet pipe. Provide valved drain and
hose connection off strainer bottom.
' 2.05 EXPANSION TANK:
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ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE II
A. Use pressurized, bladder type equal to AMTROL Model AX. '
2.06 AIR SEPARATORS: '
A. Centrifugal type for 125 psi operating pressure, with steel tank, 3/16 inch
galvanized steel perforated strainer, perforated stainless steel air collector, and
drain connection.
B. Provide on suction side of system circulation pump with AMTROL #720 air
elimination valve.
2.07 MANUAL AIR VENTS: ,
A. Construct manual air vents from 1/4" Crane #702 pet cock and a 2 foot length of
1/4" copper tube. '
B. Connect pet cock to all high points in piping system. Connect 2 foot length of 1/4"
copper tubing to outlet of pet cock and coil above ceiling. ,
2.08 RELIEF VALVES:
I
A. ASME rated direct spring loaded type, lever operated, non-adjustable factory set
discharge pressure.
B. Provide relief valves on pressure tanks, low pressure side of reducing valves,
heating converters, and expansion tanks.
C. Select system relief valve capacity so that it is greater than make-up pressure
reducing valve capacity. Select equipment relief valve capacity to exceed rating of
connected equipment.
2.09 PUMPS:
A. Primary system pumps shall be equipped with mechanical seals, open drip -proof
motor with maximum speed of 1750 rpm. Pumps shall be centrifugal, single stage,
with cast iron casing, steel shaft, bronze fitted, and furnished with auxiliary pan.
2.10 VALVE CONNECTIONS:
A. Provide valves suitable to connect to adjoining piping as specified for pipe joints.
Use pipe size valves.
B. Thread pipe sizes 2-1/2 inches and smaller.
15510-4
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C. Flange pipe sizes 3 inches and larger.
D. Solder or screw to solder adapters for copper tubing.
2.11 GATE VALVES:
A. Bronze, rising stem, inside screw, solid wedge, solder or screwed ends. Crane
431 or Crane 1334.
B. Iron body, bronze trim, rising stem, OS. & Y., solid wedge, flanged ends. Crane
465-1/2.
2.12 GLOBE OR ANGLE VALVES:
A. Bronze, rising stem, inside screw, renewable disc, solder or screwed ends. Globe:
Crane 1 or Crane 1310. Angle: Crane 2.
B. Iron body, bronze trim, rising stem, O.S. & Y., renewable composition disc, flanged
ends. Globe: Crane 351. Angle: Crane 353.
' 2.13 CHECK VALVES:
A. Bronze, swing disc, solder or screwed ends. Crane 37 or Crane 1342.
B. Iron body, bronze trim, swing disc, renewable disc and seat, flanged ends. Crane
373.
C. Iron body, bronze trim, spring loaded, renewable composition disc, flanged ends.
Nibco #F-910 or W-91 0.
2.14 BUTTERFLY VALVES IN WATER SYSTEMS ONLY:
A. Body shall be lug type, not wafer type.
B. The valves shall have bronze discs with one piece 316SS stem with three stem
bearings.
C. Seat shall be EPDM material and shall be cartridge type with built-in "O" type seal.
2.15 BOILER DRAIN VALVES:
A. Bronze compression stop with hose thread. Nibco #73.
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1
2.16 PRESSURE RATINGS:
A. Unless otherwise indicated, use valves suitable for 125 minimum psig WSP and
450°F and 200 psig and 250°F.
2.17 VALVE OPERATORS:
A. Provide suitable hand wheels for gate, globe and drain valves, and inside hose
bibbs. ,
B. Provide one plug cock wrench for every ten plug cocks sized 2 inches and smaller, '
minimum of one. Provide each plug cock sized 1-1/2 inches and larger with a
wrench, with set screw. ,
C. Provide valves located more than 7 feet from floor in equipment room areas with
chain operated sheaves. Extend chains to about 5 feet above floor and hook to '
clips arranged to clear walking aisles.
2.18 BACKFLOW PREVENTOR:
A. Provide a backflow preventor equal to line size Febco Model 825Y at the hydronic
system fill station.
2.19 CLOSED SYSTEM CHEMICAL TREATMENT
A. Provide a 1 -year supply of a nitrate -borate (non -chromate) inhibitor sufficient to '
maintain a nitrite level in excess of 400 ppm.
B. The corrosion inhibitor and clean -out procedure shall be. adequate to keep the
system water clear and free of suspended corrosion products visible to the eye,
and the corrosion rate below 3 miles per year. Inhibitor shall be compatible with I
glycol solution.
2.20 COOLING TOWER TREATMENT
A. Cooling Tower Chemical Program;
1. Provide a 1 -year supply of a non -chromate tower corrosion inhibitor '
sufficient to hold corrosion rate below 3 mils per year general corrosion.
2. Provide a 1 year supply of a scale control and mud and silt control which H
may be part of the corrosion inhibitor formula or may be separate. If acid is
used, a pH monitor for accurate control will be required 'to protect system
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' metal from overfeed.
3. Any system corrosion damage over 3 mil per year from acid feed and/or
inadequate corrosion inhibitor shall be the responsibility of the water
treatment subcontractor as long as his recommendations are followed with
reasonable care and diligence.
4. Provide 2 alternate biocides of sufficient strength and quantity to control
algae, bacteria and slime in the tower system for 1 year. The algaecides
must be EPA registered and safe for operating personnel to use.
5. All of the above tower formulations shall work together to maintain fouling
below a fouling factor of 0.001. The Contractor shall be directly responsible
to see that the system is always treated.
2.21 GLYCOL SOLUTION
IA. In the condenser water system, provide propylene glycol with solution inhibitors
equal to that manufactured by Eastman Chemical Company, Kingsport, TN.
Provide freeze protection to minus 30°F.
B. Chemical used and procedure for freeze protection and cleaning of piping shall
meet all requirements of State Department of Environmental Conservation and the
State Board of Health.
C. Furnish and install an automatic glycol feeder. System shall be manufactured by
Morr or equal and shall include solid state electronics, pressure gauges, low level
pump cut-off, pre-flumed flow assembly, pressure relief valve, positive
displacement pump mounted on a primed and painted steel frame with 50 gallon
' P.E. tank. Unit controller shall be in NEMA 1 steel enclosure.
2.22 TESTING EQUIPMENT
A. Contractor shall furnish a metal cabinet to be wall -mounted with burettes for P and
M alkalinity, chloride, sulfate with Taylor comparator for phosphate and/or pH, and
' Myron -L dissolved solids meter Model 532 MTI with 3 ranges 0-50,-500, -5,000
micromhos and appropriate closed system and tower inhibitor tests.
B. Four copies of testing instructions and log pads shall be furnished in addition to
having the water treatment specialist instruct the Owner's personnel in all
' procedures and tests.
PART 3 -EXECUTION
3.01 INSTALLATION:
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A. Install all items in accordance with Manufacturer's recommendations.
3.02 PREPARATION AND PAINTING
A. Ream pipes and tubes. Clean off scale and dirt, inside and outside, before
assembly. Remove welding slag or other foreign material from piping.
B. Paint all piping with color as directed by Owner. All paint, preparation, etc. shall be
as indicated in Section 09900 Painting.
3.03 CONNECTION:
A. Screw joint steel piping up to and including 2-1/2 inch. Weld piping 3 inch and 1
larger, including branch connections.
B. Make screwed joints with full cut standard taper pipe threads with red lead and
linseed oil or other approved non-toxic joint compound applied to make threads
only. ,
C. Use main sized saddle type branch connections for directly connecting branch
lines to mains in steel piping if main is at least one pipe size larger than the branch
for up to 6 inch mains and if main is at least two pipe sizes larger than branch for 8
inch and larger mains. Do not project branch pipes inside the main pipe.
D. Provide non -conducting type connections wherever jointing dissimilar metals in
open systems. Brass adapters and valves are acceptable.
3.04 UNDERGROUND PIPE PROTECTION:
A. All underground black steel pipes shall be factory coated with scotch coat or
bitumastic and wrapped with plastic/bitumastic tape.
B. All pipe joints and fittings shall be field coated with bitumastic to the same
thickness as the pipe coating and wrapped with plastic/bitumastic tape.
C. All underground black steel pipes shall be protected by ten (10) pound magnesium
anodes. Provide one anode at each point where pipe enters or leaves the ground
and at 100 foot intervals or as shown on plans. Anode lead wires shall be #12 TW
copper attached to the pipe by thermo-weld or Cadweld process., Anodes shall be
buried a minimum of two (2) feet below pipe or five (5) feet below finished grade,
whichever is greater.
D. On exterior wall of building at service entrance, provide a test station mounted
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eighteen (18) inches above finished grade per detail on plans.
3.05 ROUTE AND GRADES:
A. Route piping in orderly manner and maintain proper grades. Install to conserve
headroom and interfere as little as possible with use of space. Run exposed
piping parallel to walls. Group piping whenever practical at common elevations.
Install concealed pipes close to building structure to keep furring to a minimum.
' B. Slope water piping 1 inch in 40 feet and arrange to drain at low points.
C. On closed systems, equip low points with 3/4 inch drain valves and hose nipples.
Provide, at high points, collecting chambers and manual air vents.
D. Make reductions in piping with eccentric reducing fittings installed to provide
'drainage and venting.
' E. Install piping to allow for expansion and contraction without stressing pipe or
equipment connected.
IF. Provide clearance for installation of insulation and for access to valves, air vents,
drains and unions.
' 3.06 AIR VENTS:
A. Where large air quantities can accumulate, provide 1/2" Crane #801 and faucet,
' and 1/2" copper tubing in lieu of 1/4" pet cock and tubing.
B. For float type air vents in ceiling spaces or other concealed locations, provide vent
' tubing to nearest drain.
3.07 RELIEF VALVES:
A. Pipe relief valve outlet to nearest floor drain.
' B. Where one line vents several relief valves, make cross sectional area equal to sum
of individual vent areas.
' 3.08 VALVES:
A. Install valves with stems upright or horizontal, not inverted.
' B. Install gate valves for shut-off and isolating service, to isolate equipment, part of
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systems or vertical risers. '
C. Install globe valves for throttling service and control device or meter by-pass.
D. Provide spring loaded check valves on discharge of heating, chilled, and
condenser water pumps.
E. Provide drain valves at main shut-off valves, low points of piping and apparatus.
3.09 PUMPS:
1
A. Provide drains for bases and stuffing boxes piping to and discharging into floor
drains.
B. Provide air cock and drain connection on horizontal pump casings.
II
C. Provide gate valve and line sized suction diffuser with strainer on suction and line II
sized soft seated check valve, globe valve, and gate valve on discharge. A triple u ,
duty valve along with a gate or butterfly valve for isolation is also approved on
discharge.
D. If suction diffuser with strainer is used, a separate strainer is not required. Provide " '
a fine start-up strainer, and replace it with final strainer after 24 hours of system
operation. 1
E. Decrease from line size, with long radius reducing elbows or reducers. Support
piping adjacent to pump such that no weight is carried on pump casings. Provide '
supports under elbows on pump suction and discharge line sizes 4 inches and
over.
F. Ensure pumps operate at specified system fluid temperatures without vapor
binding and cavitation, are non -overloading in parallel or individual operation,
operate within 25% of midpoint of published maximum efficiency curve.
G. Qualified millwright to check, align, and certify base mounted pumps prior to
start-up.
3.10 GLYCOL SOLUTION
A. Provide sufficient quantity of propylene glycol solution for initial fill of system tohI
level indicated on plans. Mix solution per manufacturer's recommendations.
Provide necessary testing equipment for monitoring solution concentration and
training before Owner's personnel. Clean and test system prior to adding glycol
15510-10 ,
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solution.
3.11 TESTING:
A. Test all chilled, hot water, chilled -hot water, and condenser water piping systems
to assure their being absolutely tight. In the case of pipes which are to be
insulated, tests shall be completed and the piping system proved to be absolutely
tight before any insulation is applied. Wherever pipes are placed so that they will
ultimately be concealed, these tests shall be conducted and the absolute tightness
of each piping system shall be demonstrated before that system is concealed so
as to be inaccessible.
B. Test Method: Impose on piping system a hydrostatic pressure of 150 psig for a
period no less than eight hours. During this test period, all pipe, fittings, and
accessories in the particular piping shall be carefully inspected and any leaks shall
be stopped.
C. Wherever conditions permit, each piping system shall thereafter be subjected to its
normal operating pressure and temperature for a period of no less than twenty-four
hours. During that period, it shall be kept under the careful observation of the
contractor.
D. The piping systems must demonstrate the propriety of their installation by
remaining absolutely tight during this period. The satisfactory completion of any
test or series of tests shall not relieve the contractor of any responsibility with
regard to the ultimate proper and satisfactory operation of such piping systems
and their accessories.
E. Cleaning of HVAC piping system:
• 1. After completion of the water circulating systems, they shall be thoroughly
cleaned of scale, grease and other foreign matter with solutions as directed
by a water treatment consultant employed by the contractor.
2. The cleaning of the water circuits shall consist of alternate filling, circulating,
and draining until accumulations of foreign matter disappear.
3. The cleaning solution shall be trisodium phosphate or suitable alternative
and water, concentration as recommended by the chemical manufacturers
for this duty. This solution shall be pumped through the piping at such a
rate as to remove oil, mill scale, etc.; discard and drain. Repeat this
operation twice. At the end of the second flushing period, check PH of
water in system (litmus paper) and if not neutral, repeat flushing or
neutralize with appropriate chemical. Building circulating water pumps may
be used for pumping the cleaning solution if the mechanical seals are
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replaced after the cleaning operation.
4. Add a corrosion inhibitor to the system as soon as possible following the
clean out procedure. Inhibitor shall be compatible with glycol solution.. '
F. In case of defects, they shall be made good to the satisfaction of the
engineer/architect and the work retested without delay. Such work shall be done
without additional charge. ,
G. Give engineer two days' notice before tests are made. Do not draw water off the '
pipe or cover pipes until examined by engineer or architect's representative.
Acceptance of tests does not imply the acceptance of piping layout or practices
contrary to the plans and specifications.
3.12 CONDENSER WATER SYSTEMS BALANCE: '
IF
A. The contractor shall prepare the water systems for balancing in the following
manner. All balancing shall be performed with glycol solution in system.
1. Open all valves to full open position. Close coil bypass stop valves. Set '
mixing valve to full coil flow.
2. Remove and clean all strainers.
3. Examine water in system and determine if water has been treated and
cleaned.
4. Check pump rotation.
5. Check expansion tanks to determine they are not air bound and the system
is completely full of water.
6. Check all air vents at high points of water systems and determine all are
installed and operating freely.
7. Set all temperature controls so all coils are calling for full cooling. This
should close all automatic bypass valves at coil and chillers. Same
procedure when balancing hot water coils, set on full call for:heating.
8. Check operation of automatic bypass valves.
9. Check and set operating temperatures of boilers and chillers to design '
requirements.
10. Complete air balance must have been accomplished before actual water
balance begins.
B. Test and. Balance Procedure - Phase Two:
1. Set chilled water, hot water, and condenser water pumps to proper gallons
per minute delivery.
2. Adjust water flow of chilled water through chillers. Adjust water flow of
condenser water through condensers and towers.
15510-12 ,
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3. Adjust water flow of hot water through boilers (if required).
4. Check leaving water temperatures and return water temperatures through
' chillers and convertors. Reset to correct design temperatures.
5. Check water temperatures at inlet side of cooling and heating coils. Note
rise or drop of temperatures from source.
1 6. Proceed to balance each chilled water coil and hot water coil.
7. Upon completion of flow readings and adjustments at coils, mark all settings
and record data.
C. Test and Balance Procedure - Phase Three: Upon completion of Phase 1 & 2, the
Contractor shall proceed with Phase 3 as follows:
' 1. After adjustments to coils are made, recheck settings at the pumps, chillers,
boilers, and towers and readjust if required.
' 2. Install pressure gauges on coil. Read pressure drop through coil at set flow
rates on call for full cooling and on full heating. Set pressure drop across
bypass valve to match coil full flow pressure drop. This prevents
unbalanced flow conditions when coils are on full bypass.
3. Same procedure on chillers to adjust chiller bypass valves. Same
procedure on cooling towers to adjust spray nozzles.
4. Record and check the following items at each cooling and heating element.
5. Inlet water temperatures.
6. Leaving water temperatures.
7. Pressure drop of each coil.
8. Pressure drop across bypass valve.
9. Pump operating suction and discharge pressure and final T.D.H.
10. List all mechanical specifications of pumps.
11. Rated and actual running amperage of pump motor.
' 12. Water metering device readings. .
Upon completion of Phase Three, all information shall be inserted on a sheet
listing all items required by specifications and be included in complete test and
balance report. All sheets shall be neatly typed.
3.13 WATER TREATMENT
A. Provide sufficient quantity of treatment for initial start-up of system and 180 days
operation. Provide necessary monitoring equipment and provide training for
Owner's personnel.
END OF SECTION
1 15510-13
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HORIZONTAL INCLINED WATERTUBE HOT WATER BOILER
SECTION 15553
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Boiler(s)
B. Controls and boiler trim
C. Indoor -outdoor controller
D. Hot water connections
E. Fuel connections
F. Electrical hook-up
G. Flue connection
1.02 RELATED WORK:
A. Section 15510 Hydronic System
B. Section 15971 Electric Controls
1.03 QUALITY ASSURANCE:
A. Comply with Applicable Regulations and shall meet A.S.M.E. and pressure vessel
codes.
B. Units approved and labeled by Underwriter's Laboratories.
C. Provide a 20 year non -pro rated thermal shock damage parts warranty.
1.04 REFERENCE STANDARDS:
A. Provide factory tests to check construction, controls and operation of unit.
B. Provide authorized boiler inspection prior to shipment and submit copy of
inspection report to Engineer.
15553-1
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
C. Boilers to be guaranteed to operate at minimum efficiency of 80%. t
D. Boilers shall meet or exceed ASHRAE Standard 90.
1.05 SUBMITTALS:
A. Manufacturer's descriptive literature, operating instructions, maintenance and ,
repair data.
B. Manufacturer's installation instructions. ,
PART 2- PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS:
A. Manufacturer and type as scheduled or equal. :1
B. Substitutions: Items of same function and performance are acceptable in 1
conformance with Section 15010.
2.02 GENERAL:
A. Provide factory assembled, factory fire -tested, self-contained, readily transported
unit ready for operation except for connection of water, fuel, electrical, controls, I
and vent services.
B. Mount on 4" concrete housekeeping pad and have forced draft burner, burner '
controls, boiler trim, and temperature limiting device.
C. 1. Boiler shall be of the horizontal inclined water tube type designed and I
constructed in accordance with ASME Code Section IV for a maximum working
pressure of 125 psig and to carry the appropriate ASME stamp. Boiler tubes shall
be straight 2" O.D., 13 gauge, SA 178 Grade A steel. Tubes must be easily
obtainable from competitive sources. Proprietary tubes which can only be obtained
from the boiler manufacturer are not acceptable.
2. On direct service water heating applications, swimming pool heaters, or where
aggressive water may be encountered, provide 2" O.D. hard drawn, 13 gauge, SB
75 copper tubes and magnesium anodes instead of steel tubes.
D. Tubes shall be rolled and flared into flat rectangular tubesheets mounted in two
rectangular box headers. Boiler head plates shall be removable to provide easy
access to the boiler tubes for inspection and cleaning. Head plates shall be 5/8"
15553-2 ,
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thick SA515 Grade 70 steel with reinforcing rib(s). Hand hole(s) shall be provided
(on sizes 2000 and up) in the front head plates.
E. Firebox shall be made of high temperature castable refractory to withstand not less
than 2000°F. backed by a minimum of 3" thick Rockwool insulation. Access shall
be provided to the firebox and burner assembly through a removable refractory
lined door.
F. The boiler jacket shall be of not less than 18 gauge steel with galvanized finish.
(Optional 20 gauge mirror finish stainless steel). Painted jackets shall consist of
100% acrylic paint, water reducible with maximum VOC of 250 gm/L, on surface
prepared to SSPC surface preparation specification No. 1.
G. Boiler shall be equipped with a combination pressure/temperature gauge, ASME
rated relief valve. Coordinate working pressure at 30#, 45#, 75#, or 125#. Provide
operating control, high limit control with manual reset, firing rate control (where
applicable), probe type low water cut off with manual reset and test switch
(optional float type low water cut off, manual reset low water cut off, etc.) and draft
diverters (up to 16" vent size) or barometric dampers (18" vent size and up).
H. Atmospheric burners shall be quiet burning cast iron, raised port burner heads with
vertical type cast iron venturi tube and orifice, for use with natural gas/ or other fuel
if scheduled. Gas burner is to be equipped with main and pilot gas cocks, main
and pilot gas valves, and gas pressure regulators. Gas valves and controls are to
be provided to meet UL (FM/IRI/CSD-1 code, optional) requirements.
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Control power shall be 115 volts, 60Hz, 1 phase. Control system S with electric
interrupted ignition, intermittent pilot shall be used on Model 100-2500. Control
System D with interrupted ignition, shall be used on Models 2750 through 1500.
The draft hood shall be built into the boiler to minimize headroom requirements
and shall not he a separate device on top of the unit.
PART 3- EXECUTION
3.01 INSTALLATION:
A. Complete structural, mechanical, and electrical connections in accordance with
manufacturer's installation instructions.
B. Provide factory start-up service, make adjustments and efficiency tests.
C. Provide any and all manufacturer recommended piping, valves and controls.
15553-3
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
MECHANICAL DRAFT CLOSED CIRCUIT INDUSTRIAL COOLER
SECTION 15711
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Industrial Coolers
B. Controls
C. Accessories
1.02 RELATED WORK:
A. Section 15510 Hydronic Systems
1.03 SUBMITTALS:
A. Submit shop drawings and product data in accordance with Section 15010.
B. Submit suggested structural steel support including dimensions, sizes, and
locations for mounting bolt holes. Include weight distribution drawings showing
point loadings.
C. Submit schematic showing capacity controls.
D. Submit manufacturer's operation, and maintenance instructions.
PART2-PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS
A. Acceptable manufacturers are Marley and Baltimore Air Coil.
B. Substitutions: Items of same function and performance are acceptable in
conformance with Section 15010.
2.02 PERFORMANCE:
A. Reference mechanical equipment schedule for performance data.
2.03 CONSTRUCTION:
15711-1
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
A. Furnish and install, as shown on plans, factory assembled industrial fluid cooler(s)
of induced -draft design, with single side air entry and vertical air discharge.
Principal construction shall be of heavy gauge, G210 hot -dip galvanized steel.
B. The cold water basin shall be constructed of heavy gauge, hot -dip galvanized
steel. Basin shall include a depressed section with drain/cleanout connection.
Standard accessories shall include large area lift -out, steel strainer with perforated
openings sized smaller than the water distribution nozzle orifices; an integral anti-
vortexing hood to prevent air entrainment; and brass make-up valve with large
diameter plastic float arranged for easy adjustment.
C. The heat transfer section of the industrial fluid cooler shall be encased witft heavy
gauge galvanized steel panels and shall be removable. The coil shall be all prime
surface steel, have a design pressure of 280 psig, be tested at 350 psig air
pressure under water and hot -dip galvanized after fabrication. The coil shall be
designed for free drainage of fluid.
D. The wet deck surface and integral drift eliminators shall be formed from polyvinyl
chloride (PVC) and shall be impervious to rot, decay, fungus or biological attack.
The surface shall be manufactured and performance tested by the industrial fluid
cooler manufacturer to provide single source responsibility and assure control of
the final product. A separate set of eliminators shall be removable in easily
handled sections for quick access to the coil. All eliminators !shall provide a
minimum of three changes in air direction and limit drift loss to less than 0.001% of
the total water circulated.
E. Water shall be distributed evenly over the coil at a flow rate sufficient to ensure
complete wetting of the coil at all times. The system shall consist of a hot -dip
galvanized steel header and schedule 40 PVC spray branches with large diameter,
non -clog, 360° plastic spray nozzles. The branches and spray nozzles shall be
held in place by snap -in rubber grommets providing quick removal of individual
nozzles or complete branches for cleaning or flushing.
F. Fan(s) shall be heavy duty, axial flow with aluminum alloy blades. Air shall
discharge through a fan cylinder designed for streamlined entry and minimum tip
clearance for maximum fan efficiency. Fan(s) and shaft(s) shall be supported by
heavy duty, self -aligning, grease packed ball bearings with moisture proof seals
and integral clinger rings. All bearings shall be designed for minimum L10 life of
40,000 hours. Fan(s) shall be driven by a one-piece, multi -groove,
neoprene/polyester belt designed for not less than 150% of motor nameplate
horsepower. Fan sheave(s) shall be cast aluminum and motor sheave(s) shall be
protected from moist discharge air by a vented enclosure. Each motor shall be on
an easily adjusted, heavy-duty motor base and shall be two speed..
15711-2
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G. A close -coupled, bronze fitted centrifugal pump equipped with a mechanical seal
shall be mounted on the pan and piped to the suction strainer and water
distribution system. It shall be installed so that it can be drained freely when the
' pan is drained.
H. A large hinged access door and internal walkway shall be provided for access to
' the coil, eliminators, and fan plenum section. The water make-up valve, float ball,
and sump suction strainer shall be accessible from outside the unit.
PART 3- EXECUTION
3.01 INSTALLATION:
A. Install cooler on concrete pad and beams as instructed by manufacturer.
' 3.02 START-UP AND INSTRUCTION:
A. Have manufacturer's representative inspect cooler after installation is complete
and submit report prior to start up, verifying installation is in accordance with
specifications and manufacturer's recommendations.
' B. Provide manufacturer's representative for start-up of each cooling tower and four
hours instruction of Owner's operating personnel.
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
HYDRONIC HEAT PUMP UNITS
SECTION 15780
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Hydronic heat pump air conditioning unit
B. Controls
C. Roof mounting frame
1.02 RELATED WORK:
A. Section 15010 General Mechanical Requirements
B. Section 15890 Low Pressure Ductwork and Accessories
1.03 QUALITY ASSURANCE:
A. Meet the requirements of UL and applicable codes.
B. Test and rate cooling systems to ARI Standard 210.
C. Furnish units complying with ANSI Standards for safety and efficiency and certified
for outdoor applications.
1.04 SUBMITTALS:
A. Submit Manufacturer's Data Sheets on each unit and all accessories to be
furnished. Clearly indicate optional features to be furnished and all electrical
requirements. Include detailed installation instructions and dimensions.
B. Submit Shop Drawings on special mounting arrangements if not included in
standard installation instructions.
C. Submit extended warranties required herein.
1.05 WARRANTY:
A. Provide five year unconditional parts warranty on compressor units.
15780-1
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ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
PART 2- PRODUCTS ,
2.01 MANUFACTURERS:
A. Units shall be products of a manufacturer who provides local service personnel
from factory representative, franchised dealer or certified maintenance service
shop.
B. Acceptable manufacturers are Carrier, Trane, American Air Filter and Frederick.
2.02 TYPE:
A. Provide units having electric refrigeration, reverse cycle heat pump heating and '
electric resistance supplemental heating.
B. Units shall be self-contained, packaged, factory assembled and pre -wired,
consisting of cabinet and frame, supply fan, controls, motor starters, air filter,
cooling coil, compressor condenser coil and fan. '
2.03 CONSTRUCTION
A. The unit casing shall be fabricated from heavy gauge galvanized sheet metal. All
interior surfaces shall be lined with 1/2", 1-1/2 lb. fiberglass insulation. All
fiberglass shall meet NFPA 90A requirements. Service access shall be through '
insulated access panels which are insulated and held in place by mounting slots
and self -tapping screws. The unit shall be designed for straight through or right
angle discharge air flow. The unit shall be designed for easy field modification of ,
fan discharge arrangements, should job conditions warrant.
B. The fan and motor assemblies shall be low speed, 1200 RPM or less, with DWDI I
forward curved wheels for maximum quietness. The fan wheels shall be statically
and dynamically balanced. The fan housings must be constructed of steel and ,
designed for easy attachment of ductwork. The motors must be multi -speed
Permanent Split Capacitor (PSC) type with internal overload protection. Units
rated at 60,000 BTUH and under shall be direct drive. Units rated at 90,000 BTU
and over shall be belt driven. The motors must be isolated on all sizes to insure
maximum quietness. The fan and motor assembly must be capable to overcome a
minimum external static pressure of 0.2" on all sizes. All units shall have multi -
speed
fans which will allow air flow to be modified by changing motor taps on
direct drive units or motor sheaves on belt driven units. Units that adjust air flow by
increasing resistance shall not be allowed due to their increased energy
consumption when resistance is increased.
15780-2 ,
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ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
C. Air Filters: 2" thick glass fiber disposable media in metal frames arranged for easy
replacement.
D. Condensate Drain Pan: The seamless drain pan shall be fabricated from stamping
a single sheet of galvanized steel. Welded seams or plastic construction shall not
be acceptable. The drain pan shall be coated with a mastic coating to prevent
sweating and shall extend beyond the coil return bends.
E. Air Coil: The air coil shall be constructed with 3/8" seamless, staggered copper
tubes with mechanically bonded .006" thick corrugated aluminum fins, 14 fins per
inch, circuited for optimum performance.
F. Water to Refrigerant Heat Exchanger: The heat exchanger shall be of coaxial type
with a copper inner tube and a steel outer tube. The coil shall be self -venting. The
Idesign working pressure shall be 450 psig
G. Reversing Valve: The reversing valve shall be of hermetic construction with four
ports and an easily replaceable external electric solenoid coil, energized only
during the heating cycle.
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H. Internal Refrigerant Piping: All internal piping shall be hard -drawn, cold -formed
seamless copper tubing. All connections shall be brazed.
' 2.04 COMPRESSOR
A. The compressor shall be 3,500 RPM hermetic type with internal and external
vibration isolator mountings and motor overload protection. To assure secure
mounting, compressor shall be securely bolted to the unit frame. Clips and other
' such fasteners are unacceptable.
2.05 SAFETY CONTROLS:
A. Each unit shall be provided with limit controls to prevent compressor operation
when an unsafe condition exists. A refrigerant high pressure cutout operating
' through a solid state module shall de -energize the compressor if the refrigerant
pressure exceeds 395 psig. The solid state module shall also sense the
refrigerant suction temperature and leaving water temperature and de -energize the
compressor if either temperature gets out of range.
2.06 EXTENDED OPERATING RANGE:
A. Provide units with factory mounted controls to allow operation with entering water
temperature as low as 50°F on heating and as high as 110°F on cooling. The unit
' 15780-3
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shall retain its ARI, UL and CSA labels.
2.07 CONTROLS:
A. Each unit shall be equipped with factory mounted and wired controls to operate the
unit in response to the space thermostat. The connection of the control wiring
shall be to the externally mounted terminal strip. A cover for field mounting is
available where code requirements necessitate its use.
PART 3- EXECUTION
3.01 INSTALLATION:
A. Suspend unit from structure using spring isolators per specifications.
B. Provide flexible hose connection kit.
C. Isolate unit from all piping systems.
3.02 SCHEDULE:
A. Refer to plans for Mechanical Equipment Schedule.
END OF SECTION
15780-4
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
100% OUTSIDE AIR HEATING/COOLING UNITS
SECTION 15790
PART 1 -GENERAL
1.01 WORK INCLUDED:
A. Packaged rooftop heating/cooling unit
B. Controls
C. Roof mounting frame
1.02 RELATED WORK:
A. Section 15010 General Mechanical Requirements
B. Section 15890 Low Pressure Ductwork and Accessories
1.03 QUALITY ASSURANCE:
A. Meet the requirements of UL and applicable codes.
B. Test and rate cooling systems to ARI Standard 210.
C. Furnish units complying with ANSI Standards for safety and efficiency and certified
by AGA for outdoor applications.
1.04 SUBMITTALS:
A. Submit Manufacturer's Data Sheets on each unit and all accessories to be
furnished. Clearly indicate optional features to be furnished and all electrical
requirements. Include detailed installation instructions and dimensions.
B. Submit Shop Drawings on special mounting arrangements if not included in
standard installation instructions.
1. Submit extended warranties required herein.
1.05 WARRANTY:
A. Provide ten year unconditional parts warranty on heat exchangers.
15790-1
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B. Provide five year unconditional parts warranty on compressor units. ,
PART 2 -PRODUCTS
A. Units shall be products of a manufacturer who provides local service personnel
from factory representative, franchised dealer, or certified maintenance service
shop.
B. Acceptable manufacturers are Carrier, Rheem, Trane, Lennox, York and Bryant. 1
2.01 TYPE: I I
A. Provide roof mounted units having gas burner and electric refrigeration.
B. Units shall be self-contained, packaged, factory assembled and pre -wired,
consisting of cabinet and frame, supply fan, heat exchanger and burner, controls,
motor starters, air filter, direct expansion cooling coil, compressor, condenser coil
and fan.
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2.02 CONSTRUCTION:
A. Cabinet: Steel with bonderized, baked enamel finish, access doors or removable
access panels with screwdriver operated flush cam type fasteners. Structural '
members shall be minimum 18 gage, with access doors or removable panels,
minimum 20 gage.
B. Insulation: Neoprene coated glass fiber on surfaces where conditioned air is
handled. Protect edges from erosion.
C. Heat Exchangers: Aluminized steel; of welded construction.
D. Supply Fan: Centrifugal type rubber mounted V -belt drive, adjustable variable '
pitch motor pulley, of multi -speed direct drive and rubber isolated hinge mounted
motor. Complete fan assembly shall be isolated.
E. Air Filters: 2 inch thick 30% efficient disposable media in metal frames arranged
for easy replacement.
2.03 BURNER:
A. Gas Burner: Induced draft type burner with adjustable combustion air supply, ,
pressure regulator, gas valves, manual shut-off, intermittent spark ignition, flame
15790-2 '
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sensing device, and automatic 100% shut-off.
B. Gas Burner Safety Controls: Energize ignition, limit time for establishment of
flame, prevent opening of gas valve until pilot flame is proven, stop gas flow on
ignition failure, energize blower motor, and after air flow proven and slight delay,
allow gas valve to open.
C. High Limit Control: With fixed stop at maximum permissible setting, de -energize
burner on excessive bonnet temperature and energize burner when temperature
drops to lower safe value.
D. Supply
Fan Control:
From bonnet
temperatures and independent of burner
controls.
Include
switch
for continuous
fan operation.
2.04 EVAPORATOR COIL:
A. Provide copper tube aluminum fin coil assembly with galvanized drain pan and
connection, capillary tubes, and expansion valve.
2.05 COMPRESSOR:
A. Provide hermetic compressor, 3600 RPM maximum resiliently mounted with
positive lubrication, crankcase heater, high and low pressure safety controls, motor
overload protection, service valves, and filter dryer.
B. Timed off circuit shall limit number of compressor starts to 12 per hour.
' C. Provide capacity control by hot gas by-pass or cylinder unloading (7-1/2 tons and
above) or cycling the compressors (below 7-1/2 tons).
2.06 CONDENSER:
IA. Provide copper tube aluminum fin coil assembly with sub -cooling rows.
B. Provide direct drive axial fans, resiliently mounted with fan guard, motor overload
protection, wired to operate with compressor.
C. Provide refrigerant pressure switch to cycle condenser fans.
' 2.07 SUPPLY/RETURN CASING:
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15790-3
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
A. Dampers: On units below 5 tons capacity, provide manual outside air dampers for '
fixed outside air quantity.
B. Dampers: When scheduled, provide remote controlled outside air dampers with ,
damper operator and remote rheostat for adjusting outside air quantity.
C. Economizer: On all units, provide outside and relief dampers with damper 1
operator and control package to automatically vary outside air quantity. Outside
air damper shall fail to closed position. Relief dampers may be gravity balanced.
Relief dampers equal to Greenheck EM -30 ( maximum face velocity not to exceed
1000 fpm) shall be field installed in return air duct for horizontal discharge unit only.
Provide relief damper by unit manufacturer when available.
D. Gaskets: Provide tight fitting dampers with edge gaskets.
E. Damper Operator: 24 volt, spring return with motor and gear train sealed in oil.
F. Mixed Air Controls: Maintain selected mixed air temperature lock out compressor '
below approximately 57°F ambient, return dampers to minimum position above
approximately 75°F ambient (adjustable).
2.08 OPERATING CONTROLS:
A. Provide low voltage, adjustable thermostat to control burner operation heater ,
stages in sequence with delay between stages compressor and condenser fan,
and supply fan to maintain temperature setting.
1. Include system selector switch (heat -cool -off) and fan control switch
(on -auto).
B. When scheduled, provide programmable thermostat to maintain night thermostat
setting, lock out refrigeration, and close outside air damper for night and
unoccupied operation.
C. Provide smoke detector in the return of units below 2000 CFM The detector shall
be installed prior to mixing with outside air. Provide smoke detector in supply of
units greater than 2000 CFM. If the entire area served by the unit is not protected
by smoke detectors, then provide a smoke detector in the return also of units
greater than 2000 CFM. The smoke detectors shall shut the unit down. If the
building contains a fire alarm system, the smoke detectors shall also signal the fire
alarm panel. For systems greater than 15000 CFM serving more than one floor,
provide smoke detector at each floor in return air duct prior to connection to the
common return duct and prior to connection any outside air duct.
15790-4
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
PART 3- EXECUTION
3.01 INSTALLATION:
A. Mount units on 12" high, factory built roof mounting frame providing watertight
enclosure to protect ductwork and utility services.
B. Provide flashing at intersection of unit and curb.
3.02 PACKAGED ROOF TOP HEATING/COOLING UNITS SCHEDULE:
A. Refer to plans for Mechanical Equipment Schedule.
END OF SECTION
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PACKAGED SELF CONTAINED AIR CONDITIONERS - WATER COOLED
SECTION 15791
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Packaged air conditioning unit
B. Controls
C. Compressor
D. Water cooled condenser
E. Factory run-in test
1.02 RELATED WORK:
A. Section 15010 General Mechanical Requirements
B. Section 15891 Low and Medium Pressure Ductwork and Accessories
1.03 QUALITY ASSURANCE:
A. Meet the requirements of UL and applicable codes.
B. Test and rate cooling systems to ARI Standard 210.
C. Furnish units complying with ANSI Standards for safety and efficiency and certified
by AGA for outdoor applications.
1.04 SUBMITTALS:
A. Submit Manufacturer's Data Sheets on each unit and all accessories to be
furnished. Clearly indicate optional features to be furnished and all electrical
requirements. Include detailed installation instructions and dimensions.
B. Submit Shop Drawings on special mounting arrangements if not included in
standard installation instructions.
1. Submit extended warranties required herein.
15791-1
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1.05 WARRANTY:1
A. Provide five year unconditional parts warranty on compressor units.
1.06 VERIFICATION OF FACTORY RUN-IN TEST
A. Each unit shall be factory run-in tested. The manufacturer shall supply a certified
test report signed by the manufacturer's executive management to confirm•
factory run-in test.
B. Fan shall be dynamically balanced at the factory at design RPM to less than 3
mils peak -to -peak. Manufacturer shall provide certified data. If vibration data is
not supplied by manufacturer, contractor conduct vibration tests on fan and unit
in the field and submit certified report to engineer for review.
1.07 ACOUSTICS
A. SOUND DATA - Manufacturer shall provide certified sound power data for Self
Contained including unit discharge sound power and inlet + cabinet radiated
sound power. Sound power shall not exceed the values listed in "a" below. All
ratings shall be in accordance with AMCA 300 and ANS S1.32 testing and rating 1
standards. [All ratings shall include the horizontal discharge option.]
B. Manufacturer shall furnish detail on unit size, configuration and test procedure used for I
arriving at sound power in "A".
C. In the event that the unit does not meet the required sound power, the contractor shall
install attenuation to the unit to meet the required space acoustics specification; and
shall not be paid until such attenuation is tested and meets the sound criteria.
PART 2- PRODUCTS
A. Units shall be products of a manufacturer who provides local service personnel
from factory representative, franchised dealer, or certified maintenance service
shop.
B. Acceptable manufacturers are Carrier, Trane and York.
2.01 TYPE:
A. Provide roof mounted units having gas burner and electric refrigeration.
B. Units shall be self-contained, packaged, factory assembled and pre -wired, 1
consisting of cabinet and frame, supply fan, controls, motor starters, air filter, direct
15791 -2 1
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ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
expansion cooling coil, compressor, condenser coil and fan.
2.02 UNIT CASING
A. The unit framework shall be formed structural steel members of 14 gauge
galvanized steel. Exterior panels shall be fabricated from 18 -gauge galvanized
steel. All galvanized steel shall have a zinc phosphate coating or shall be painted
with an enamel primer to help prevent corrosion.
B. The unit exterior shall be painted with one mil coat of alkyd enamel paint to help
prevent corrosion.
IC. All panels in contact with the air stream shall be insulated with 3/4 -inch of 1 -lb
density fiberglass to prevent sweating of metal and to attenuate sound.
D. All exterior panels shall be removable for easy service access. Panels requiring
frequent removal such as fan drive and bearing greasing area, compressor,
' condensers and economizer shall have quick -acting fasteners to simplify
removal. Control panel door shall lift off its hinges. All panels shall be self
supporting for ease of removal.
' F. Refrigerant sight glasses shall be accessible from the exterior of the unit through
removable plugs in unit panel.
' E. Manufacturer shall provide and warrant external spring isolation to contractor for
field installation under unit base. For units with internally isolated fans and
Compressors, manufacturer shall provide neoprene isomode pads for placement
under the unit base by the contractor during installation.
' 2.03 COMPRESSORS
IA. Compressor shall be manufactured by manufacturer of Self Contained unit.
B. Compressors shall be industrial grade, energy efficient direct drive 3600 RPM
' maximum speed reciprocating, scroll or rotary screw type. The motor shall be of
a suction gas cooled hermetic design. Compressor shall have suction screen,
centrifugal oil pump with dirt separator, oil sight glass, and oil charging valve. A
' solid state temperature sensor shall be embedded in the motor windings to
protect against excessive winding temperatures.
I1. If reciprocating or rotary screw compressors are utilized, the manufacturer
shall provide a discharge gas muffler per compressor along with
compressor mounting isolators: rubber -in -shear or spring.
' 15791 - 3
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ADMINISTRATION BUILDING
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C. The unit shall have multiple compressors with independent refrigerant circuits.
No compressor shall exceed 15 HP.
2.04 CONDENSERS
A. The condenser shall be of shell and finned tube design and built in accordance '
with ANSI/ASHRAE 15 - Safety Code for Mechanical Refrigeration. Water -side
working pressure shall be rated for 400 psig.
B. One condenser shall be provided for each compressor. Condenser tubes shall
be nominal 3/4 -inch OD smooth bore. Each condenser shall have a subcooler.
Manifolding multiple compressors into one condenser shall not be acceptable.
C. Condenser shall have removable heads to allow for mechanical cleaning of
tubes. Water piping, internal to the unit that connect to condensers, shall have
clean -out plugs and drain plugs to aid in the cleaning. If tube -in -tube condensers
are utilized, contractor shall provide a plate frame heat exchanger or closed ,
circuit tower to maintain the integrity of the condenser water.
D. Condenser water piping shall include a single water inlet and outlet with NPT
connections. Connections shall be brought out to the exterior of the unit. For
units with multiple inlet and outlet piping connections, contractor shall provide a
manifold on the exterior of the unit. t
2.05 EVAPORATOR
A. Evaporator capacity shall be rated in accordance with ARI Standard 410.
B. Evaporator shall be constructed of 1/2 -inch OD copper tubes expanded into
aluminum fins in a staggered pattern. Tubes shall be internally finned to
increase heat transfer. Coil refrigerant circuiting shall be intertwined to ensure full
coil face activation when only one compressor is active. If smooth bore tubes are
utilized, coil shall have a minimum of 4 -rows.
C. Fin series shall not exceed 12 fins/inch.
D. Coils shall be removable to allow for periodic cleaning of the finned surfaces. For
coils separated by 2 -inches or more, non -removable type is acceptable.
E. Coil drain pan shall be constructed of galvanized steel with a zinc phosphate
coating to help prevent corrosion. Drain pan shall be insulated with 3/4 -inch of 1 -
lb density fiberglass to help prevent sweating of metal. Drain piping including trap
15791-4 1
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ADMINISTRATION BUILDING
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with a clean -out shall be provided to the exterior of the unit. For units with
multiple drain connections, contractor shall provide housekeeping pad to elevate
unit and provide traps on the exterior of the unit.
F. An intermediate drain pan with condensate follower shall be required on all coils
to prevent the bottom half of the coil from becoming overloaded with condensate.
Intermediate drain pan is not required for coils with a finned height less than or
equal to 55 -inches.
IG. Capacity: Per schedule on plans
' 2.06 REFRIGERANT CIRCUIT
A. Refrigerant circuits shall be independent and completely piped in the factory.
This includes filter driers, sight glasses, liquid distributors, thermal expansion
valves including external equalizer, liquid line service valves and refrigerant
charging ports. Sight glass shall be visible through removable plugs in unit
casing to allow access during unit operation.
B. Contractor shall be required to install a high pressure refrigerant relief valve in
each compressor circuit of units without factory installed valves. Valve allows for
venting of refrigerant to a field provided containment chamber.
' C. Refrigerant -side test pressure shall be 425 psig. Test pressure shall be printed
on unit nameplate.
D. Each compressor circuit shall be dehydrated and charged with R-22 and oil.
2.07 SUPPLY FAN, DRIVE AND MOTOR
A. Supply fan shall be a double width, double inlet medium pressure forward curved
fan secured to a solid steel shaft with grease lubricated bearings designed for
200,000 hours. The contractor shall provide and install "duct pants" per
applicable SMACNA and AMCA standards for units with dual fans.
B. Bearings shall have grease lines extended to a common location. For units
without common location for greasing bearings, contractor shall install grease
lines to a common location.
C. Drive components shall include fixed pitch sheaves and multiple V -belts sized for
150% of nominal motor horsepower.
15791-5
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ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
D. Motor shall be [high efficiency open dripproof]. Motor shall have a standard T-
frame and a minimum service factor of 1.15. All drive components shall be
accessible without the use of scaffolds or ladders, to facilitate periodic
maintenance checks and for operator safety.
E. The contractor shall provide and install a housekeeping pad and external
vibration isolators for units without fan and drive components mounted to a
common base and that are not internally isolated with rubber -in -shear or spring
isolators. The contractor shall install a flexweave flexible duct connection to unit
ductwork for units without an internal flexible connection.
F. The contractor shall conduct field vibration tests on each unit and provide report I
to owner's representative. Unit vibration with fan and compressors running shall
not exceed 3.0 mils peak to peak. This test is not required on units that the
manufacturer factory tests to ensure smooth operation and that can provide a
factory certified vibration report on each unit.
G. For unit scheduled with horizontal discharge, the contractor shall provide, install I
and warrant the performance of an acoustical horizontal discharge. Discharge
shall provide a low pressure drop transition of airflow that permits duct
connections from any or all four sides of the unit. Discharge shall have 16 -gauge
galvanized panels insulated with two -inches of 1 -lb density fiberglass to help
prevent sweating of metal and for sound attenuation. Discharge frame shall be
14 -gauge galvanized steel. A 16 -gauge insulated blast plate shall be installed to
provide a horizontal transition of the airflow. For factory mounted discharges,
manufacturer's performance data shall include the static pressure and acoustical
effects of this discharge arrangement.
H. The contractor or manufacturer shall cut discharge openings to meet scheduled
ductwork sizes. Two-inch duct connections shall be installed on each opening to
simplify duct connections.
2.08 FAN MODULATION 1
A. Acceptable airflow modulation devices alternatives include variable speed belt
changer, frequency inverter or inlet guide vanes. Actuator, linkages and duct
static pressure controller shall be factory installed inside of unit casing and
factory adjusted and tested for proper operation.
B. The contractor shall provide and install airflow modulation controls on units •.
without a factory installed controller. A duct pressure sensing probe shall be
installed by the contractor and shall be connected to the unit's static pressure
controller. The static pressure control point shall be adjustable and visible on
15791-6
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front of the unit controller. Inlet dampers or inlet guide vanes shall close prior to
fan start to reduce motor starting torque.
2.09 FILTERS
A. The contractor shall provide and install a filter section two-inch medium velocity
Farr 30/30 fiberglass filters on units without a factory installed filter section. Units
shall have filters installed with removable protective covers to protect filter
' surfaces during installation. Filters shall be removable from the rear or side of the
unit. An extra set of filters shall be provided by the contractor for field installation
after unit start-up.
2.10 WATERSIDE ECONOMIZER
' A. Not used.
2.11 WATER VALVES AND CONTROLS
A. The contractor shall provide, install and warrant valves, piping and controls for
units with a waterside economizer. Factory installation of valves, piping and
controls is acceptable.
B. The contractor shall install shutoff valves on the exterior of the unit that close on
t unit power failure. Unit manufacturer's valves that close upon power failure are
an acceptable alternative.
C. Units shall have valves that provide constant water flow through the unit. When
the waterside economizer is enabled, the valves shall modulate water flow
through the economizer coil to maintain discharge air temperature and provide
bypass through the condensers to maintain constant unit waterflow. Full water
flow is maintained through the condenser when mechanical refrigeration is
required.
D. For units without a waterside economizer, manufacturer shall provide a factory
' installed 2 -way shutoff valve with controls to maintain minimum condensing head
pressure during low water temperature operation. This valve will allow
mechanical refrigeration with an entering water temperature down to 34 F. Valve
' shall have a minimum position to maintain minimum waterflow requirement, that
is determined by manufacturer, through condensers during mechanical
refrigeration.
' 15791 -7
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CITY OF FAYETTEVILLE
2.12 AIRSIDE ECONOMIZER- NOT USES
2.13 HEATING COIL ,'
A. Where scheduled, the contractor shall provide, install and warrant an electric
heating coil in the ductwork. Duct mounted coils shall have disconnect switches,
controls for staging of heat and safeties. Electric heating coils mounted in the
unit by the unit's manufacturer is acceptable. Units with factory installed electric
coils shall have a single point power connections.
B. Where scheduled, the contractor shall provide, install and warrant a hot water
heating coil in the ductwork. Coil shall have 5/8 -inch OD, 0.020 inch thick copper
tubes expanded into aluminum plate fins. Coil shall have drain connection. Coil
shall have one row and a maximum fin series of seven fins/inch. The heating coil
shall have a waterside working pressure rating of 200 psig. Coil shall be factory
leak and proof tested at 1-1/2 times the maximum working pressure. Heating coil
shall have a three-way diverting valve for capacity control. Units with factory I
installed hot water coils are acceptable and manufacturer shall provide valve and
actuator for installation by the contractor.
2.14 UNIT CONTROLS
A. The unit shall be controlled by a stand-alone direct digital control (DDC) system
mounted on the unit or equipment room wall. A dedicated product interface panel
shall be factory installed on each unit. The panel shall be microprocessor -based,
with factory packaging and testing of all required control components for reliable
equipment operation. The controller shall not. require field calibration or re -
calibration during its life.
B. The product interface panel shall provide control of unit operation and monitor p
and control factory and field installed sensors, actuators, relays and contractors. '
The panel shall be a complete system for stand-alone unit control and include
controls to safely and efficiently operate the unit. Unit operating modes and
alarms shall be displayed in English sentences or codes on the front of the I
product interface panel. ,
C. The contractor shall install a manual switch on the outside of the unit that will
shut down and reset the unit without having to remove any unit panels. Factory
mounted switches are acceptable.
D. For variable -air -volume units, product interface panel shall control cooling stages ,
to maintain discharge air temperature setpoint.
15791 -8 '
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E. For constant air volume units, product interface panel shall control cooling
capacity stages to maintain setpoint of zone sensor.
F. The contractor shall install an entering air temperature sensors in the unit's
airflow inlet. The intent of these sensors are to provide low and high entering air
temperature protection to the unit. Factory mounting of these sensors are
acceptable.
1. When a low entering air temperature condition (<37 F) is detected, the
unit shall shut down, energize a heat relay (if available), open condenser
I. water valves (if available) to allow flow, energize alarm relay and display a
specific alarm code on the product interface panel.
2. When a high entering air temperature condition (>135 F) is detected, the
' unit shall shut down, energize alarm relay and display a specific alarm
code on the control panel.
3. For units without this protection, manufacturer shall provide and warrant
controls for field installation by the contractor.
G. The contractor shall install controls to perform the following. Unit shall have
adjustable setpoints and setpoints shall be displayed on the front of the product
interface panel for the following. Factory installation by the unit manufacturer is
acceptable.
1. Supply air temperature.
2. Supply air temperature control band.
3. Morning warm-up/occupied heating temperature.
4. Night heating unoccupied temperature.
5. Supply air pressure.
6. Supply air pressure control band.
7. Airside economizer damper minimum position.
8. Supply air temperature reset starting point.
9. Supply air temperature reset gain.
10. Supply air temperature maximum reset.
H. Safeties - The product interface panel shall monitor and take action on the
following safeties:
1. Low refrigerant pressure (one per compressor).
2. Low refrigerant temperature (one per compressor).
3. High refrigerant pressure (one per compressor).
4. Compressor motor overload (one per compressor).
5. Supply fan motor overload.
I15791 -9
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6. Phase Reversal/Phase Loss.
7. High entering air temperature.
8. Low entering air temperature.
9. Low entering water temperature.
10. Supply fan high duct pressure.
11. Supply fan low duct pressure.
The front of the product interface panel shall be capable of displaying the
following operating states and alarms:
1. Operating State.
a. Reset.
b. Stop.
c. Auto.
d. Pre -Fan.
e. Pre -Cool.
f. Freeze Protection.
h. Maximum Ventilation.
h. Supply fan on.
i. Cooling Level (number of stages).
j. Economizing.
k. Economizing/Cooling Level (number of stages).
I. Morning Warm-up.
m. Heat.
2. Alarms.
a. Entering condenser water temperature sensor failure.
b. Leaving condenser water temperature sensor failure.
c. Low refrigerant pressure cutout - one per compressor.
d. High refrigerant pressure cutout - one per compressor.
e. Low refrigerant suction temperature - one per compressor.
f. Compressor motor overload - one per compressor.
h. Supply fan motor overload trip.
h. Supply fan high duct pressure.
i. Supply fan low duct pressure.
j. Phase reversal.
k. Phase loss.
I. Low entering air temperature to unit.
m. High entering air temperature to unit.
n. Low condenser water temperature.
o. Control panel failure.
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p. Compressor contactor failure - one per compressor.
q. Improper compressor configuration unit identification.
r. Zone - Night heat temperature sensor failure.
s. Morning warm-up temperature sensor failure.
t. Supply air temperature reset sensor failure.
u. Loss of condenser water flow.
v. Entering economizer water temperature sensor failure.
w. Dirty filter.
x. Heat failure.
y. Product interface panel communication failure.
J. The contractor shall install controls so the following unit operating conditions
cause the unit to shut down, energize alarm relay and require manual reset.
Visual identification of type of alarm(s) shall be provided on the product interface
panel.
1. Supply fan motor overload trip.
2. High entering air temperature (135 F).
3. Control panel failure.
4. Phase loss/Phase reversal.
5. Supply air high duct pressure
K. The contractor shall install controls so the following operating conditions cause
the unit to shut down, energize an alarm relay and reset automatically when
condition corrects itself. Visual identification of type of alarm(s) shall be provided
on the product interface controller.
L.
1. Low entering air temperature at unit inlet (<37 F).
2. Low entering condenser water temperature (<54 F).
3. Loss of condenser water flow.
4. Dirty filter.
5. Heat failure.
6. Morning warm-up temperature sensor failure.
7. Zone temperature sensor failure.
8. Supply air temperature reset temperature sensor failure.
9. Condenser leaving water temperature sensor failure.
The contractor shall install controls so the following operating conditions shut
down the affected refrigerant circuit, energize an alarm relay and require manual
reset. Unit shall automatically switch to an alternate refrigeration circuit to
maintain air temperature setpoint.
Low refrigerant pressure.
15791 -11
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2. High refrigerant pressure.
3. Compressor motor overload trip.
4. Compressor high motor temperature.
5. Low evaporator refrigerant suction temperature.
6. Compressor contactor failure.
The contractor shall install controls capable of displaying the following five
temperatures on the front of the product interface panel:
1. Entering air temperature.
2. Discharge air temperature (for VAV units only).
3. Morning warm-up zone temperature (for units with NSB/MWU option).
4. Night heat zone temperature (for units with NSB/MWU option).
5. Supply air temperature adjustment zone temperature (for units with
discharge air temperature reset).
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The unit shall have the necessary components to interface with a control system
provided by others to perform the following unit functions: I
1. EXTERNAL INTERLOCK AUTO/STOP: terminals which shut the unit
down when the connection between them is open. These terminals shall
be used for emergency shut down of unit. This input shall be overridden
by the Fan -On Ventilate input.
2. UNOCCUPIED/OCCUPIED MODE:- terminals which select the ,
unoccupied or occupied mode of unit operation. Unoccupied mode is
initiated when the connection between terminals is closed. [Morning
warm-up and then occupied heating or] Occupied cooling will be initiated :.
when the connection between the terminals is open. This input shall be
overridden by the Fan -On Ventilate input.
3. FAN -ON VENTILATE: terminals which turn the fan on and enable the
units volume control for VAV units, and lock out refrigeration and heating
when the connection between them is closed.
4. COMMON ALARM: terminals that provide contact opening or closure in
the event of any unit malfunction that normally initiates an alarm code
display.
The contractor shall provide, install and warrant the following controls. Factory
mounting of these controls by the unit manufacturer is acceptable.,,
1. A non -fused disconnect switch shall be installed inside of the control
panel. Switch shall be accessible without opening any exterior panels.
2. A water flow switch shall be installed in the condenser water piping and
wired to product interface panel. Switch shall be interlocked with
15791 -12
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mechanical cooling such that when there is a loss of condenser water
flow, mechanical refrigeration is locked out and an alarm contact is
energized. Switch shall be cleanable type.
3. A dirty filter differential pressure switch shall be installed across the unit
filters. When a dirty filter condition is detected, an alarm contact shall be
energized and a alarm message shall be visible on the product interface
panel.
4. Unit controls shall have ability to reset discharge air temperature setpoint
based on a remote space temperature sensor or a 4-20 mA/2-10 Vdc
input. The temperature at which reset begins and the amount of reset
shall be adjustable on the product interface panel. The intent of this
control is to provide a form of unit demand limiting and/or to allow VAV
boxes to maintain minimum airflow requirements in the zone for optimal
comfort.
1 5. An automatic reset thermostat with capillary tube element serpentined
across the inlet of the unit. The intent of this control is to provide low
entering air temperature protection. Upon detection of this condition, the
I. unit shall shut down, energize an alarm relay, open water valves and
display an alarm code on the front of the product interface panel.
L P. When scheduled, provide programmable thermostat to maintain night thermostat
setting, lock out refrigeration, and close outside air damper for night and
unoccupied operation.
Q. Provide fire stat or smoke detector in the return of units below 2000 CFM The
detector shall be installed prior to mixing with outside air. Provide smoke detector
in supply of units greater than 2000 CFM. If the entire area served by the unit is
not protected by smoke detectors, then provide a smoke detector in the return also
I. of units greater than 2000 CFM. The smoke detectors shall shut the unit down. If
the building contains a fire alarm system, the smoke detectors shall also signal the
fire alarm panel. For systems greater than 15000 CFM serving more than one
floor, provide smoke detector at each floor in return air duct prior to connection to
the common return duct and prior to connection any outside air duct.
2.15 SYSTEM CONTROLS - See Controls Section
2.16 PERFORMANCE - See Schedule on Plan
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PART 3 EXECUTION
3.01 INSTALLATION
A. Handle, rig and install the unit in accordance with manufacturer's installation I
instructions.
B. Provide for single point main unit power connection to electrical service. All I
electrical work performed in the installation of the system as described in this
specification shall be per the National Electrical Code (NEC) and per applicable
state and local codes.
C. Install field mounted accessories described in this specification.
D. Furnish and install condenser water piping to unit inlet and outlet connections.
E. Pipe drain pan condensate to location shown on plans or to nearest floor drain
F. Provide ductwork connections to unit. I
3.02 SCHEDULE - See Plans
PART 4 SEQUENCE OF OPERATIONS
4.01 COMMERCIAL SELF-CONTAINED AIR CONDITIONING UNIT CONTROL
A. The stand-alone microprocessor based Self -Contained Unit (SCU) control panel
shall monitor and control the SCU in a stand-alone mode or as directed by the
BAS. The SCU control panel shall have local display and adjustment. The BAS
shall perform the following SCU control strategies and provide the points as
listed on the SCU point list, and the specified monitoring and diagnostics.
1. Occupied Mode - When the unit is turned ON by the BAS during normal
occupied hours, all self-contained unit control functions will be enabled.
Constant Volume units will operate under space thermostat control.
Variable Air Volume units will operate in the cooling mode. The self-
contained unit defaults to this mode whenever communication with the
BAS unit is lost.
a. Variable air volume boxes will control
to their
occupied/unoccupied
setpoints,
depending on the schedule
for the
zone.
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2. Normal Operation - In the occupied mode, as described above, the
I dedicated self-contained unit controls shall operate economizer and
stages of cooling to maintain supply air temperature setpoint (VAV units),
or stages of heating, economizer, and cooling to maintain space
temperature setpoint (constant volume units). Motorized inlet guide vanes
shall modulate to maintain static pressure setpoint in supply air ductwork
(VAV units only).
B. The following setpoints shall be reset manually through the BAS by the operator,
or reset automatically by the BAS:
1. Space temperature (constant volume units)
2. Supply air temperature (VAV units)
3. Static pressure (VAV units)
C. Startup Mode - When the unit is turned ON by the BAS for optimal start, heating
' or cooling is provided as required by space temperature. On Variable Air
Volume units, the BAS holds the self-contained unit in the heating mode until the
zone temperature is greater than the user entered occupied heating setpoint.
1 On both Constant and Variable Air Volume units, the outside air dampers remain
closed unless economizing, until the occupied time of the zone.
I 1. Heat source at VAV box: In morning warmup mode, exterior VAV boxes
shall control to occupied heating setpoint while interior boxes open to max
CFM setpoint. When morning warmup setpoint is reached, interior and
exterior boxes shall control to occupied setpoints.
D. Coastdown Mode - When the unit is turned "OFF" by the BAS for optimal start,
heating or cooling is provided as required by space temperature. On Variable Air
Volume units, the BAS holds the self-contained unit in the heating mode until the
I zone temperature is greater than the user entered occupied heating setpoint.
On both Constant and Variable Air Volume units, the outside air dampers remain
closed unless economizing, until the occupied time of the zone.
E. Nighttime Free -Cool Purge Mode - An economizer only cooling cycle shall be
provided during unoccupied hours when outdoor air conditions are suitable and
the zone requires cooling. During this mode, the supply fan is on, ventilation is
at a maximum, and mechanical heating and cooling are locked out.
1. VAV boxes will control to their occupied cooling setpoint.
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F. Duty Cycle Mode (Constant Volume Units) - When the unit is duty cycled "OFF",
place unit in one of the following user -defined Duty Cycle Modes.
1. One or two stages of heating capacity.
2. One or two levels of mechanical cooling capacity.
3. Unit shutdown, with 30 minute minimum off time.
G. Demand Limit Mode - Under conditions of high electrical demand, VAV box
cooling setpoints shall be automatically raised by an operator defined amount.
The reduced cooling requirement unloads the self-contained unit. Temperature
limits are provided to ensure occupant comfort.
H. Night Setback Temperature Control - During unoccupied hours, the
self-contained unit shall be controlled by the BAS to maintain user defined
unoccupied heating and cooling setpoints in the space. The outdoor air damper
remains closed during night setback operation.
Associated VAV boxes control to their unoccupied heating and cooling
setpoints.
Outdoor Air Ventilation Control - The use of outdoor air for ventilation shall be
provided only during scheduled hours of occupancy and during periods of timed
override. Use of the airside economizer overrides any outdoor air ventilation
control.
Low Ambient Compressor Lockout - Compressor operation shall be disabled
below a user defined outdoor air temperature.
K. Timed Override - When a timed override is initiated by the user, the self-
contained unit will return to its normal occupied mode for a user determined
period of time. If the condenser water pump and cooling tower are not operating,
they shall be started with the self-contained unit. When the timed override period
has ended, the unit shall automatically shut down. The BAS shall monitor and
store the override time for each timed override input for documentation of after-
hours operation.
1. VAV boxes in the effected zone shall control to their occupied setpoints
while the unit is in timed override operation.
L. Emergency Shutdown - The unit will shut down in response to a contact closure
to the BAS indicating the presence of a fire or other emergency condition.
15791-16
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M. Unit status report - For each self contained unit, the BAS shall provide an
operating status summary of all sensed values (zone temperature, discharge
temperature, etc.) setpoints and modes.
N. Diagnostics/Protection - The BAS system shall be able to alarm from all sensed
points from the self contained units and diagnostic alarms sensed by the unit
controller. Alarm limits shall be designated for all sensed points.
END OF SECTION
15791 -17
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LOW AND MEDIUM PRESSURE DUCTWORK AND ACCESSORIES
SECTION 15891
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Sheet metal ductwork including plenums
B. Grease ductwork
C. Wet ductwork
D. Ductwork below slab
E. Flexible insulated ducts
F. Air devices including louvers and dampers
G. Other duct accessories
1.02 RELATED WORK:
A. Section 15010 General Mechanical Requirements
B. Section 15250 Mechanical Insulation
1.03 SUBMITTALS:
A. Submit Manufacturer's Data Sheets on air devices, dampers, louvers, flexible duct,
take -off fittings and other manufactured items.
B. Submit Shop Drawings of ductwork layouts, fittings and air devices prior to
installation of ductwork.
1.04 QUALITY ASSURANCE:
A. Fabricate ductwork in compliance with SMACNA Duct Construction Standards and
NFPA 90A.
B. Provide kitchen grease ducts in compliance with NFPA 96.
15891-1
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ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
PART 2 - PRODUCTS
2.01 SHEET METAL DUCTS:
A. Use galvanized steel lock forming quality with 1.25 ounces per square foot zinc
coating on each side.
B. Use rivets or sheet metal screws for fasteners.
C. Use proper water and fire resistant sealant.
2.02 GREASE DUCTS:
A. Provide proper clearances to building construction or insulate duct with approved
material.
B. Weld seams and make air tight.
2.03 FLEXIBLE DUCTS:
A. Flexible spiral wound duct with 1" insulation and vapor barrier equal to
Owens-Corning Fiberglas INL-25 or ATCO Series 900.
1. Insulation conductance at 75°F, no greater than 0.23 btu/hr. sf. deg.
2. Vapor transmission of vapor barrier no greater than 0.1 perms.
2.04 AIR DEVICES:
A. Furnish and install items as scheduled on the Drawings.
B. Provide ceiling mounted devices compatible with ceiling type.
C. Provide storm proof type louvers with heavy gauge wire mesh on outside. Field
paint as directed.
D. Provide insulated low energy motorized shutter -dampers for large outdoor air
intakes as scheduled.
2.05 DUCTWORK ACCESSORIES:
A. Provide double thickness airfoil type
turning
vanes
at all
rectangular elbows.
Perforated, internally insulated blades
shall be
used on
ducts
20" and wider.
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•HVAC RENOVATION
ADMINISTRATION BUILDING
• CITY OF FAYETTEVILLE
B. Provide 16 gauge galvanized steel balancing dampers with quadrants or
adjustment rod and lock screw where required for proper TAB.
C. Fabricate splitter dampers of double thickness sheet metal with streamlined shape.
IProvide exterior adjustment rod and lock screw.
D. Where round duct takes off from rectangular duct, provide high efficiency take off
and butterfly volume damper. Take off fitting shall be manufactured with 1" flange,
3/4" x 14" neoprene gasket, eccentric adaptor with 45° transition on upstream side.
E. Provide flexible connections of neoprene coated flameproof fabric tightly crimped
into metal edging strips. Attach to ductwork and equipment with sheet metal
screws.
F. Provide access doors at duct and at ceiling where required for maintenance and
inspection. Fabricate of galvanized steel with gaskets and quick fastening locking
devices. Provide double thickness insulated door in insulated ductwork.
G. When indicated on Drawings, provide type B fire damper of the curtain type with
1 fusible link with 90% free area of duct. Select fusible link for 160°F unless shown
otherwise. Provide access doors at all fire dampers.
' 2.06 MEDIUM PRESSURE PRIMARY AIR SYSTEMS:
A. Provide all ductwork materials and gauges in compliance with applicable
SMACNA Standards for high velocity ductwork. (Not snap lock)
B. All primary air ductwork shall be round, except at fan discharge.
C. All fittings shall be low pressure loss type.
' D. Use 450 conical wye fittings at all branch outlets.
1 E. Make all size transitions concentric and smooth.
F. All 90° elbows shall be smooth, one piece type with a centerline radius equal to 1.5
times the duct diameter.
G. The primary air system shall perform equal to that shown on the plans, providing
the minimum static pressure and air volume is scheduled at all outlets (mixing
boxes), with the air handling unit fan external static pressure equal to that shown.
15891-3
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CITY OF FAYETTEVILLE
H. At medium pressure primaru air ducts, provie double wall equal to United McGill it ,
Aocusti 27 ofr the first 20 feet from the AC units. All other round ductwork shall be
single wall wrapped with insulation.
I. Seal all joints air tight with tape.
PART 3- EXECUTION
3.01 FABRICATION:
A. . Provide proper duct reinforcing with angles or cross breaks per SMACNA
Standard, insulate per Section 15250. ,
B. Lap metal ducts in direction of air flow.
C. Make transitions gradually with divergence no greater than 30°.
D. Rigidly construct ducts with tight joints free from vibration, rattles, or air noise.
Audible leaks shall be sealed with approved sealant.
E. Construct plenums of galvanized panels suitably reinforced and diagonally braced.
3.02 INSTALLATION:
A. Use flexible duct (5 feet or less) for final connection to supply air devices only in
lay -in ceilings. Connect with strap or clamp. Do not use on return ducts.
B. Use flexible fabric connections at each fan and air handling device.
C. Verify locations required of outlets and make adjustments to coordinate with ,
architectural features, lighting fixtures, etc.
D. Adjust air devices for proper throw distance and direction.
•1
E. Provide at least either two lined, rectangular elbows or 15 feet of lined, rectangular,
straight duct at the supply and return connection of all forced air units.
F. Seal all longitudinal and transverse joints with foil type duct tape.
END OF SECTION
15891-4
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
FAN POWERED VAV BOX WITH HOT WATER HEAT
SECTION 15933
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Fan Powered VAV boxes
B. Unit controls and safety devices
C. Accessories
D. Hot water coils
1.02 RELATED WORK:
A. Section 15010 General Mechanical Requirements
B. Section 15891 Low and Medium Pressure Ductwork and
Accessories
1.03 SUBMITTALS:
A. Submit Manufacturer's Data Sheets on each unit including all accessories. Clearly
indicate optional features to be furnished. Include detailed instructions and
dimensions.
B. Submit extended warranties required herein.
1.04 QUALITY ASSURANCE:
A. Furnish units complying with ANSI Standards for safety and efficiency.
B. All units shall be UL listed.
1.05 EXTENDED WARRANTIES:
A. Provide one year unconditional warranty on parts and labor.
1.06 ACCEPTABLE MANUFACTURERS:
A. Acceptable manufacturers are Trane and Carrier.
15933-1
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ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
PART 2 - PRODUCTS
2.01 PRODUCTS
A. Casing shall be welded, 22 gauge galvanized steel. Leak rate is 1% of nominal
unit airflow at 0.50" wg. Filter rack provided on plenum inlet. One piece aluminum
backdraft damper provided on fan discharge.
B. Interior surface of unit casing shall be acoustically and thermally lined with 1/2", 1.9
lbicu. ft. density glass fiber with high density facing.
I.
C. Electric heater shall be factory provided and mounted, resistance open -type heater
with disc -type automatic thermal primary safety device and a fusible link or manual
reset thermal secondary cutout. Unit fan and heater stages shall be energized
individually. Provide factory disconnect on panel door. PE switches are factory set.
Provide safety air flow switch.
D. Coils shall be factory mounted one row coils with 150 fins per foot. Provide full fin
collars for accurate fin spacing and maximum tube -fin contact. 5/8" O.D. seamless
copper tubes shall be mechanically expanded into fin collars. Coils shall be leak
tested at 300 psig air pressure under water. Provide female sweat -type water
connections with right or left hand connections as shown on plans.
E. Fan shall be FC style, galvanized steel fan wheel. Fan housing is 22 gauge steel
and fanboard is 18 gauge steel. Motors are permanently lubricated, three speed,
direct drive, permanent split capacitor type. Maximum motor temperature rise on
all speeds of 50 degrees C.
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F. Parallel units shall have factory mounted fan on -off switch. Normally open electric I
switch provided to energize fan as independent stage of heat.
G. Series units shall have factory mounted normal open air flow switch to energize ,
fan.
H. Access panel shall be factory mounted on bottom of unit to provide access to air
,
valve and/or fan.
I. Provide factory mounted or field installed throw away filters. '
J. Provide plenum inlet sound attenuator. - ;,.
K. Provide electric air valve which shall be a cylindrical die cast aluminum flow control
15933-2 1
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device with a factory provided integral 24 VAC electric actuator. Valve inlet tapered
to fit standard round ductwork. Leak rate less than 1% at 4" wg. inlet static
pressure. Integral multiple point, averaging flow sensing ring to provide flow
measurement within 5% of unit rated airflow with 1 1/2 diameters of straight duct
upstream of unit. Integral flow taps and calibration chart provided on each unit.
L. Provide pressure independent zone temperature proportional electronic control
circuit employing a closed loop flow feedback circuit. Unit airflow is monitored by
an integral, multiple point, averaging flow sensing ring and a transducer to
maintain constant airflow to within 5% of rated cfm down to 25% of unit nominal
cfm, independent of changes in system static pressure. Unit airflow is reset in
response to an electronic thermostat located in the conditioned zone. Factory set,
field adjustable settings are provided for unit minimum and maximum airflows.
Integral flow taps and calibration chart provided on each unit.
PART 3- EXECUTION
3.01 INSTALLATION:
A. Provide complete installation and connect ducts, electrical power, and control
wiring.
B. Provide factory start-up.
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BUILDING AUTOMATION AND AUTOMATIC TEMPERATURE CONTROLS SYSTEM
SECTION 15949
PART 1: GENERAL
1.01 SECTION INCLUDES
A. Products Furnished But Not Installed Under This Section
B. Products Installed But Not Furnished Under This Section
C. Related Sections
ID. Description
E. Approved Control System Contractor
F. Quality Assurance
' G. System Performance
H. Submittals
Warranty
1
J. Ownership of Proprietary Material
1.03 PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION
A. Section 15781 - Packaged Combination Heating/Cooling
1. Pressure Transmitters
'
2. Temperature Transmitters
3. Power Transmitters
' 4. Refrigerant Leak Detectors
B. Section 15781 - Packaged Combination Heating/Cooling
1. Smoke/Fire Detectors
1.04 RELATED SECTIONS
' A. The General Conditions of the Contract, Supplementary Conditions, and
General Requirements are a part of these Specifications and shall be
used in conjunction with this Section as a part of the Contract Documents.
1.05 DESCRIPTION
A. General: The control system shall be as indicated on the drawings and
described in the specifications.
B. Direct Digital Control (DDC) technology shall be used to provide the
functions to control the mechanical systems on this project.
C. The control system shall accommodate simultaneous multiple user
operation limited only by operator password. Multiple users shall have
access to all valid system data. An operator shall be able to log onto any
1
15949 -1
HVAC RENOVATION U)
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
work -station on the control system and have access to all appropriate
data.
D. The control system shall be designed such that each mechanical system
will be able to operate under stand-alone control. In the event of a ,'
network communication failure, or the loss of any other controller, the
control system shall continue to independently operate under control.
E. Communication between the control panels and all work -stations shall be
over a high speed peer -to -peer network. Application Specific Controllers
shall be constantly scanned by the network controllers to update point I
information and alarm information.
1.07 QUALITY ASSURANCE " I
A. System Installer Qualifications -The installing controls contractor shall be '
licensed by the Arkansas Department of Health for HVAC with an "A"
license as well as all jobsite personnel shall have a "C" license. The
Installer shall have an established working relationship with the Control.
System Manufacturer of not less than three years. The Installer shall have
successfully completed Control System Manufacturer's classes on the
control system. The installer shall have an office within [50] miles of the '
project site and provide 24 hour response in the event of a customer call.
B. Codes and Standards: Meet requirements of all applicable standards and
codes, except when more detailed or stringent requirements are indicated
by the Contract Documents, including requirements of this Section.
1. Underwriters Laboratories: Products shall be UL-916-PAZX listed. '
2. National Electrical Code -- NFPA 70.
3. Federal Communications Commission -- Part J.
4. ASHRAE/ANSI 135-1995 (BACnet)
C. All products used in this installation shall be new, currently under
manufacture, and shall be applied in similar installations for a minimum of
[2] years. Spare parts shall be available for at least 5 years after
completion of this contract. '
1.08 SUBMITTALS
I.
A. Contractor shall provide shop drawings and manufacturers' standard
specification data sheets on all hardware and software to be provided.
1. Project Record Drawings - As built version of the submittal shop:
drawings.
2. Testing and Commissioning Reports and Checklists. I
15949 -2 1
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3. Operating and Maintenance (O & M) Manual - These shall be as -
built versions of the submittal product data.
B. Training:
1 1.09 WARRANTY
The Contractor shall provide a course outline and training manuals
for all training classes at least six weeks prior to the first class as
well as provide a minimum of 2 classroom training sessions, 4
hours each, throughout the contract period for personnel
designated by the Owner.
A. Labor & materials for control system specified shall be warranted free
from defects for a period of twelve (12) months after final completion
acceptance by the Owner. Control System failures during the warranty
period shall be adjusted, repaired, or replaced at no charge or reduction in
service to the Owner.
1 PART 2: PRODUCTS
1 2.01 SECTION INCLUDES
A. Acceptable Manufacturers
' B. Operator Interface
C. System Software
D. Building Controllers
E. Custom Application Controllers
F. Application Specific Controllers
G. Communications
H. Input/Output Interface
I. Auxiliary Control Devices
2.02 ACCEPTABLE MANUFACTURERS
A. Acceptable systems are:
1 Control System Manufacturer
Trane Company
Johnson Controls
1 Landis & Staefa
Alerton
2.03 OPERATOR INTERFACE
A. Operator Interface. Furnish 1 PC based work -stations as shown on the
system drawings. Each of these work -stations shall be able to access all
information in the system. These work -stations shall reside on the same
15949 -3
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE + '
high speed network as the building controllers, and also be able to dial
into the system. '
B. Hardware. Each operator work -station shall consist of:
1. Personal Computer. Furnish IBM compatible PCs as shown on the
drawings, as well as all required serial, parallel and network
communication ports and all cables. The CPU shall be a minimum ,
of an Intel Pentium and operate at a minimum of 133 Mhz, a
minimum of 16 Megabytes of RAM, one 1.44 Megabytes 3.5 inch '
diskette drive, and a 1 Gigabite hard disk. A two button mouse will
also be provided. The PC shall have a minimum ofa 15" SVGA
monitor.
2. Modems. Furnish auto -dial telephone modems.
3. Printers. Each work station shall have 1 printers, with tractor feed,
and associated cables. Each printer shall be capable of a ,
minimum 4 pages per minute operation and be compatible with
standard parallel communications.
C. System Software 1
1. Operating System. Furnish a commercially available, concurrent
multi -tasking operating system.
System Graphics. The Operator Work -station software shall be
graphically oriented. The system shall allow display of up to 10
graphic screens at once for comparison and monitoring of system
status. Provide a method for the operator to easily move between
graphic displays and change the size and location of graphic
displays on the screen. The system graphics shall be able to be
modified while on line. An operator with the proper password level
shall be able to add, delete, or change dynamic points on a
graphic. Dynamic points shall include analog and binary values,
dynamic text, static text, and animation files.
a. Custom Graphics. Custom graphic files shall be created
with the use of a graphics generation package furnished with
the system that uses the mouse. The graphics generation
package shall provide the capability of capturing or
converting graphics from other programs such as Designer,
or AutoCAD and to create and modify graphics that are
saved in industry standard formats such as PCX, TIFF, and
GEM. '
b. Graphics Library. Furnish a complete library of standard
HVAC equipment such as chillers, boilers, air handlers, ,
terminals, fan coils, and unit ventilators as well as standard
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symbols for other equipment including fans, pumps, coils,
valves, piping, dampers, and duct -work.
c. Engineering Units. Unit selection shall be able to be
' customized by locality to select the desired units for each
measurement. Engineering units on this project shall be:
Standard Inch Pound [SI]
D. System Applications. Each work -station shall provide operator interface
and off-line storage of system information. Provide the following
applications at each work -station.
1. Automatic System Database Save and Restore. Each work -station
shall store on the hard disk a copy of the current database of each
building controller which shall be updated whenever a change is
made in any panel in the system.
2. Manual Database Save and Restore. A system operator with the
proper password clearance shall be able to archive the database
rom any system panel and store on magnetic media.
3. System Configuration. The work -station software shall provide a
graphical method of configuring the system. The user with proper
security shall be able to add new devices, assign modems to
devices, and obtain a visual riser diagram of the system, allowing
for future system changes/additions.
4. Context sensitive on-line help to assist the operator in operation
and editing of the system.
5. Security. Each operator shall be required to log on to the system
' with a user name and password in order to view, edit, add, or
delete data. System security shall be selectable for each operator.
The system supervisor shall set passwords and security levels for
all other operators to restrict the operator's access for viewing
and/or changing each system application, full screen editor, and
object.
6. System Diagnostics. The system shall automatically monitor the
operation of all work -stations, printers, modems, network
connections, building management panels, and controllers,
' annunciating the failure of any device to the operator.
7. Alarm Processing. Any object in the system shall be configurable
to alarm in and out of normal state. The operator shall be able to
configure the alarm limits, warning limits, states, and reactions for
each object in the system. Actions shall include logging, printing,
starting programs, displaying messages, dialing out to remote
stations, paging, providing audible annunciation or displaying
specific system graphics. Each of these actions shall be
configurable by work -station and time of day.
8. Trend Logs. The operator shall be able to define a custom trend
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og for any data in the system. This definition shall include interval,
start -time, and stop -time. Trend intervals of 1, 5, 15, 30, and 60
minutes as well as once a shift (8 hours), once a day, once a week,
and once a month shall be selectable. Trend data shall be able to
be viewed and printed from the operator interface software. They
shall also be storable in a tab delimited ASCII format for use by
other industry standard word processing and spreadsheet
packages.
9. Alarm and Event Log. The operator shall be able to view all logged
system alarms and events from any location it the system. All
alarms and events that have not been cleared by the operator shall
be archived to the hard disk.
10. Object and Property Status and Control shall provide a method for
the operator with proper password protection to view, and edit if
applicable, the status of any object and property in the system.
11. Clock Synchronization. The real time clocks in all building control
panels and work -stations shall be synchronized on command of an
operator. The system shall automatically adjust for daylight savings
and standard time if applicable.
12. Reports and Logs. Provide a reporting package that allows the
operator to select, modify, or create reports. Each report shall be
definable as to data content, format, interval, and date. Report
data shall be archived on the hard disk for historical reporting.
Provide the ability for the operator to obtain real time logs of
designated lists of objects. Reports and logs shall be stored on the
PC hard disk in a format that is readily accessible by other
standard software applications including spreadsheets and word
processing. Reports and logs shall be readily printed to the system
printer.
a. Custom Reports to easily define any system data into a
daily, weekly, monthly, or annual report.
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E. Work -station Applications Editors. Each PC work -station shall support full
screen editing of all system applications.
1. Controller - editor for each type controller and application shall
allow the operator with proper password to view and change the
configuration, name, control parameters, and system set -points.
2. Scheduling. An editor to provide a monthly calendar for each
schedule, clearly showing exception schedules and holidays.
Provide a method for allowing several related objects to follow a
schedule. The advance and delay time for each object shall be
adjustable from this master schedule. Schedules shall be able to
be easily copied between objects and/or dates.
3. Equipment Coordination - Provide a full screen editor that allows
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equipment to be grouped for proper operation as specified in the
sequence of operations including the coordination of VAV boxes
with their associated Air Handling Equipment.
4. Not used.
G. Custom Application Programming. Provide the tools to create, modify,
and debug custom application programming. The operator shall be able
• to create, edit, and download custom programs at the same time that all
' other system applications are operating.
2.04 SYSTEM SOFTWARE
A. System Security - User access shall be secured using individual security
passwords and user names that restrict the user to only the objects,
applications, and system functions as assigned by the system manager.
B. Scheduling. Provide the capability to schedule each object or group of
objects in the system including the capability for start, stop, optimal start,
• optimal stop, and night economizer actions. When a group of objects are
scheduled together, provide the capability to define advances and delays
for each member. Each schedule shall consist of weekly schedules,
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exception schedules, holiday schedules and optimal start/stop.
IC. Alarm Reporting - Alarms shall be routed to the appropriate work -stations
based on time and other conditions. An alarm shall be able to start
programs, be logged in the event log, printed, generate custom messages
and display graphics.
D. Remote Communications. The system shall have the ability to dial out in
' the event of an alarm to receivers including PC Workstations, and Alpha-
numeric pagers.
II. Chiller Sequencing: Provide applications software to properly sequence
the chiller plant to minimize energy use and perform the following:
1. The chiller plant control application shall have the ability to control
a maximum of 25 chillers of any type including centrifugal, helirotor,
scroll, reciprocating and absorption machines as detailed in the
sequence of operations. This application shall be able to control
II both constant and variable flow systems as well as parallel, series
and decoupled piping configurations.
2. The chiller plant control application shall be able to control multiple
chiller plants per site.
3. Diagnostics/Protection - The chiller plant application program shall
be able to integrate individual chiller diagnostics into control action
decisions.
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4. Alarms and Events - All chiller plant control and status events shall
be recorded, at the operator's selection, in the building
management system event log to facilitate troubleshooting. The
chiller plant control status screens shall display chiller plant and
individual chiller alarm messages.
PID Control. A PID (proportional -integral -derivative) algorithm with direct
or reverse action and anti -wind-up shall be supplied, to calculate a time -
varying analog value used to position an output or stage a series of
outputs.
K. Staggered Start. This application shall prevent all controlled equipment
from simultaneously restarting after a power outage.
L. System Calculations. Provide software to allow instantaneous power (e.g.
KW), flow rates (e.g. L/s [GPM]) to be accumulated and converted to
energy usage data. Provide an algorithm that calculates a sliding -window
KW demand value. Provide an algorithm that calculates energy usage
and weather data (heating and cooling degree days). These items shall
all be available for daily, previous day, monthly and the previous month.
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M. Anti -Short Cycling - All binary output points shall be protected from short
cycling by allowing selectable minimum on and off -time.
2.05 BUILDING CONTROLLERS
A. General - The Building Automation System shall be composed of one or
more independent, stand-alone, microprocessor based Building
Controllers to manage the global strategies described in System software
section. Data shall be shared between networked Building Controllers.
1. The controller shall provide a communications port for connection
of the Portable Operators Terminal using Point to Point BACnet
physical/data link layer protocol or a connection to the inter -
network.
2. The Building Controller shall be BACnet Class 3 device and
perform the following BACnet Functional Group Services: Clock,
Reinitialize.
B. Communications. Each Building Controller shall perform routing to a
network of Custom Application and Application Specific Controllers.
C. Memory. The Building Controller shall maintain all BIOS and
programming information in the event ofa power loss for at least 72
hours.
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2.06 CUSTOM APPLICATION CONTROLLERS
1 A. General - The Building Automation System shall be composed of one or
more independent, stand-alone, microprocessor based Building
Controllers to manage the local strategies described in System software
section. Data shall be shared between networked Controllers. The
operating system of the Controller shall manage the input and output
communications signals to allow distributed controllers to share real and
virtual point information and allow central monitoring and alarms.
1. Controller hardware shall be suitable for the anticipated ambient
conditions. Controllers used outdoors and/or in wet ambient shall
be mounted within NEMA Type 4 waterproof enclosures, and shall
'
be rated for operation at -40 C to 65 C [-40 F to 150 F]. Controller
used in conditioned ambient shall be mounted in dust -proof
enclosures, and shall be rated for operation at 0 C to 50 C [32 F to
120 F].
2.07 APPLICATION SPECIFIC CONTROLLERS
A. General - Application specific controllers (ASC) are microprocessor -based
'
DDC controllers which through hardware or firmware design are dedicated
to control a specific piece of equipment. They are not fully user
programmable, but are customized for operation within the confines of the
equipment they are designed to serve. Each ASC shall be capable of
stand-alone operation and shall continue to provide control functions
without being connected to the network.
B. Environment - Controllers used outdoors and/or in wet ambient shall be
mounted within NEMA Type 4 waterproof enclosures, and shall be rated
for operation at -40 C to 65 C [-40 F to 150 F]. Controller used in
conditioned ambient shall be mounted in dust -proof enclosures, and shall
' be rated for operation at 0 C to 50 C [32 F to 120 F].
2.08 COMMUNICATIONS
A. This project shall comprise a BACnet inter -network. All PC Workstations
and Building Controller components shall meet ASHRAE / ANSI Standard
135-1995, BACnet. Each BACnet device shall operate on the BACnet
physical/data link protocols specified for that device as defined earlier in
this section.
B. All Building Controllers shall have a communications port for connections
with the operator interfaces. This may be either an RS -232 port for Point
to Point connection or a network interface node for connection to the
Ethernet or ARCNET network.
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C. Remote operator interface via a 9600 or faster baud modem shall allow ,
for communication with any and all controllers on this network.
Communications services over the internetwork shall result in operator
interface and value passing that is transparent to the internetwork
architecture.
D. The time clocks in all controllers shall be automatically synchronized daily. '
PART 3 EXECUTION
3.1 INSTALLATION REQUIREMENTS
A. All electrical work performed in the installation of the BAS/ATC system as
described in this specification shall be per the National Electrical Code
(NEC) and per applicable state and local codes. Where exposed, conduit
shall be run parallel to building lines properly supported and sized at a
maximum of 40% fill.
B. In no cases shall field installed conduit smaller than 1/z" trade size be ,
allowed. Where conductors are concealed (tenant spaces), cable rated
for use in return air plenums shall be used.
PART 4 SEQUENCE OF OPERATIONS
4.01 PACKAGED ROOFTOP UNITS '
A. Each packaged commercial rooftop unit shall have a microprocessor -
based controller which shall monitor and control the packaged rooftop unit
in a stand-alone mode or as directed by the building automation system.
B. The building automation system (BAS) shall perform the following rooftop '
control strategies, provide the points listed on the point list and provide the
specified monitoring and diagnostics, as well as the unit control setpoints.
1. Unoccupied Mode
When the BAS initiates the Unoccupied Mode, the rooftop shall assume ,
the unoccupied heating and cooling setpoints. If the unoccupied setpoints
are exceeded, the unit shall heat and cool until the zone temperature is
within the unoccupied setpoints. During unoccupied mode, the unit shall
close the outside air damper completely unless in full economizer
operation for cooling.
2. Occupied Mode
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When the BAS initiates the Occupied Mode the rooftop shall operate
stages of heating and cooling to maintain space temperature setpoint.
The units shall operate under zone temperature control and cycle their
heating and cooling outputs to maintain space temperature setpoints.
The rooftop units shall default to these modes, as appropriate to their
configuration, in the event that communication with the building
automation system is lost.
a. Cooling/Economizer
During the Occupied cooling mode the and mechanical cooling are used
to control zone temperature. If the enthalpy of the outside air is
appropriate to use free cooling, the economizer shall be used to satisfy
the zone temperature setpoint. If the economizer cannot satisfy space
load conditions, mechanical cooling shall be staged on as necessary.
Minimum on/off timing of the mechanical cooling shall prevent rapid
cycling.
At outdoor air conditions above the enthalpy control setting, mechanical
cooling only shall be used and the fresh air dampers shall remain at
minimum position.
3. Start-up Mode
When the rooftop unit is turned on by the BAS for optimal start, heating or
cooling is provided as required. The transition from the Unoccupied to the
Start-up mode may initiate the Morning Warm-up mode, if the space
temperature is below the Morning Warm-up setpoint. The outside air
damper shall remain closed, unless economizing, until the zone's
' scheduled occupied time.
4. Not used.
5. Coastdown Mode
' When the rooftop unit is turned off by the BAS for optimal stop, the supply
fan remains on and the outside air damper remains open for ventilation.
During Coastdown mode the setpoints will be the unoccupied
' heating/cooling setpoints provided by the BAS.
6. Purge Mode (Night Economizer)
The purge mode (night economizer) mode shall use the rooftop during
unoccupied hours to pre -cool a zone using cool night air. Through Time
of Day Scheduling, the zone shall be scheduled for the purge cycle for a
user -defined window of time. If during that period of time the purge
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criteria are satisfied, the rooftop shall begin purge operation. The control
mode of the fan shall be the same as specified for Occupied times (On or '
•Auto) and ventilation shall be enabled. Also, heating and mechanical
cooling shall be disabled while the economizer is enabled.
7. Not used. '
8. Timed Override I
When Timed Override is initiated by the user, the rooftop unit shall return
to its normal occupied mode for a period of time as specified at the . 1
building automation system. When the Timed Override period ends, the
BAS shall automatically monitor and store the override time for each '
Timed Override input for documentation of after-hours operation.
9. Not used.
10. Not used.
11. Maximum Ventilation Mode ,
When the building automation system initiates a maximum ventilation
mode, the following actions shall occur in the rooftop unit:
Outdoor air dampers open 100%
Supply fan turns ON
All cooling outputs are disabled (heating outputs remain enabled)
C. Unit Status Report
For each rooftop unit, the BAS shall provide an operating status summary
of the following information to provide the operator with critical rooftop
operating data. '
1. Unit type and size
2. Operating mode
3. Active rooftop diagnostics
4. Active cooling/heating mode
5. Active cooling/supply air setpoint
6. Active heating/supply air setpoint
7. Supply air temperature
8. Space temperature
9. Supply fan status
10. Heat stage on/off status
11. Compressor on/off status
12. Condenser on/off status
13. Return air temperature
14. Return air relative humidity I
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15. Economizer status
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16. Economizer minimum position setpoint (Software Adjustable)
D. Diagnostics
The BAS system shall be able to alarm from all sensed points from the
rooftop units and diagnostic alarms sensed by the unit controller. Alarm
limits shall be designated for all sensed points.
Individual rooftop diagnostic and alarm statuses
latching items for each rooftop unit:
a. Emergency stop
b. Supply fan failure
c. Compressor trip (each circuit)
d. Compressor contactor fail (each circuit)
shall include the following
Individual rooftop diagnostic and alarm statuses shall include the following
non -latching items for each rooftop unit:
a. Zone temperature sensor failure
b. Supply air temperature sensor failure
c. Compressor lockout
d. Outdoor air temperature sensor failure
e. Occupied zone cool/heat setpoint failure
f. Outdoor air humidity sensor failure
g. Heat failure
h. Unoccupied zone cool/heat setpoint failure
i. Return air temperature sensor failure
j. Return air humidity sensor failure
k. Unit communications loss
I. Heat communications failure
m. Dirty filter
n. Night setback zone temperature sensor fail
E. Color Graphics Display - As a minimum, the color graphics shall include
the following:
1. Moving around the entire system with just the click of a mouse for
checking alarms, temperatures, statuses, trend logs, etc. The
graphics interface must provide the ability to manually override
points. All graphics must be dynamically refreshed automatically
and adjustable from 5 to 300 seconds. A manual refresh shall also
be available at any time.
2. Digital color picture (photo quality) of front of building with provision
of 10 extra digital color pictures (photo quality) at owner discretion.
3. Entire floorplan of building with subzones independently colored
with alarm indication per subzone for all rooftop units.
4. Subzones divided into individual rooms showing all walls,
thermostat locations, room temperature, rooftop unit locations, and
any alarms. All graphics shall be dynamically linked to embedded
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graphics such as clicking on the thermostat icon shall pull up a
graphic of the thermostat with all temperature setpoints and
controls available from the thermostat. Also, clicking on the time of
day button on the thermostat shall bring up the time of day
scheduling for that room.
5. As a minimum, the rooftop unit graphic shall be fully animated with
a graphic of the elevation view of the rooftop unit showing all
sections, the name of the room served with room number, all points
per sect 4.01 para C. Animation graphics shall include but not be
limited to: when in cooling mode the condenser fan shall turn,
when in heating mode smoke shall rise from the flue vent, when the
supply fan is on, the supply fan shall spin. All alarms shall be
highlighted by red indication with light background color. All
diagnostics shall be displayed on this page.
6. As a minimum, there shall be "quick check" pages listing all rooftop
units in tabular format for filters showing all statuses and alarms for
filter. Another "quick check" page for communication status/alarms.
Another "quick check" page for all supply fan status/alarms.
Another "quick check" page for all room temperature statuslalarms.
Another "quick check" page for all exhaust fan status/alarms.
Another "quick check" page for heat/cool status/alarms.
7. Overall floorplan with subzones independently colored showing the
physical location and status/alarms for all exhaust fans only.
8. Any and all changes in any and all graphics and tables per owner's
request for a period of three weeks after start up of job.
9. A library of HVAC symbols shall be provided to the building
operator for use in generating custom displays. All hardware and
software required to create custom displays must be included in the
building automation system and turned over to the building
operator.
END OF SEQUENCE
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GENERAL ELECTRICAL REQUIREMENTS
SECTION 16010
' PART 1 - GENERAL
1.01 RELATED DOCUMENTS:
A. Comply with the Conditions of the Contract, General and Supplementary
Conditions, and any other applicable requirements contained herein or issued
under separate cover.
B. Perform other work related to or necessary for the electrical installation in
accordance with the applicable Specification Division or Section contained herein.
C. In Electrical Specification Sections, items under "RELATED WORK" are listed for
convenience only and are not guaranteed to be a complete listing of all applicable
work.
' 1.02 CODES, REGULATIONS, AND STANDARDS:
IA. Comply with the latest edition of applicable codes including the following:
1. Standard Building Code
' 2. Life Safety Code (NFPA 101)
3. National Electrical Code NEC (NFPA 70)
4. State Fire Prevention Code
' B. Comply with applicable Regulations as amended, including the following:
I1. State Department of Health Regulations
2. Rules and Regulations for Energy Efficiency Standards for New Building
Construction
' 3. State and Federal Department of Labor Regulations
4. Occupational Safety and Health Act (OSHA)
5. Utility Company Regulations and Requirements
6. Other State and Federal Laws and Regulations
7. Local Ordinances
I C. Furnish products and perform installation conforming the latest accepted
Standards published by the following organizations:
I1. Underwriter's Laboratories, Inc. (UL)
2. National Fire Protection Association (NFPA)
3. National Electrical Manufacturer's Association (NEMA)
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1
4. American Society of Testing Materials (ASTM)
5. American National Standards Institute (ANSI)
6. Institute of Electrical and Electronic Engineers (IEEE)
7. Insulated Power Cable Engineer's Association (IPCEA)
8. Certified Ballast Manufacturer (CBM)
9. Electrical Testing Laboratories (ETL)
10. Illuminating Engineering Society (IES)
11. Insurance Service Office (ISO)
12. Factory Insurance Association (FIA)
13. Factory Mutual (FM)
14. National Sanitation Foundation (NSF)
D. In case of discrepancy or conflict between Codes, Regulations, Standards, '
Drawings and/or Specifications, the requirement yielding the higher(est) quality of
work shall govern.
1.03 PERMITS AND ADMINISTRATIVE FEES:
A. Obtain and maintain all necessary licenses, permits and inspections and pay all
fees including connection fees, taxes and penalties, if any, required by the
Administrative Authority. Refundable deposits will be paid by the Owner.
1.04 PRE -CONSTRUCTION SUBMITTALS:
A. Refer to each Electrical Section for a listing of required Submittals under that '
Section. Refer to Section entitled Shop Drawings, Product Data, and Samples for
submittal procedure and requirements.
B. Submit for approval, Manufacturer's technical data sheets including performance
specifications for all equipment, major materials, and other manufactured items.
Obtain approval on product manufacturers not specifically named prior to making
submittals.
C. Submit for approval, Contractor's original Shop Drawings of all assemblies of ,
manufactured items including complete wiring diagrams. Indicate all pertinent
dimensions on scale drawings necessary for clarity and for coordination of the
installation between trades.
D. Submit for approval, a schedule of nameplates and test report forms.
E. Bind Submittals in durable cover(s) with contents conveniently organized and
properly indexed.
F. Make Submittals on all work contained in Division 16, Electrical, at one time except
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' by special permission.
1.05 TEMPORARY LIGHTING AND POWER:
A. Provide general and task lighting for construction activity as required for adequate
illumination.
B. Provide general purpose electrical outlets and special outlets as required for
construction activities.
' 1.06 INTENT:
A. It is intended that the Contractor provide a complete and operating electrical
system including all incidental items and connections necessary for proper
operation or customarily included even though each and every item may not be
indicated.
B. The Drawings indicate the general layout requirements for equipment, fixtures,
'
conduit, devices, etc. Final layout will be governed by actual field conditions with
all measurements verified at the site.
C. Conduit and wiring shown on the Drawings are diagramatic unless noted
otherwise, and are intended to indicate switching and branch circuit arrangements,
tphase balance, and general wiring connection requirements.
D. It is intended that the electrical installation be safe, reliable, energy efficient, and
easily maintained with adequate provisions for access to equipment.
E. It is intended that the electrical system operate quietly with noise levels below the
' criteria recommended for the application by NEMA. Provide corrective action as
required to reduce objectionable hum or vibration. Acoustically insulate between
outlet boxes in common wall serving different rooms.
F. The Drawings indicate diagramatically the number and function of the conductors
required for the conduit routing as shown. The Contractor has the option of
changing the routing or combining circuits in one conduit run, providing the
installation does not interfere with work of other trades, the system functions as
intended, the ampacity of the conductors is derated in accordance with the NEC,
and none of the loads require a dedicated circuit. Indicate actual conduit routing
and conductor arrangement on record drawings.
' G. Lighting and general purpose 20 ampere branch circuits may share a common
neutral, provided each branch circuit is derived from a different phase leg. Isolated
ground circuits and those served with ground fault circuit breakers must have their
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own neutral '
H. "Home runs" are indicated on the Drawings with arrows from the branch• circuit
outlets pointing in the general direction of the panelboards to which they connect,
complete with the panelboard and circuit designations. Continue "home runs" to
the designated panelboards as though the conduit runs were shown in their
entirety.
FART 2 -PRODUCTS
2.01 PRODUCT REQUIREMENTS: i
A. Furnish only new standard products of a manufacturer regularly engaged in the
production of said products.
B. Support all products by service organizations with adequate spare parts inventory 1
and personnel located reasonably close to the site.
C. Where multiple units of the same type or class of products are required, provide all
units of the same manufacturer.
2.02 PRODUCT HANDLING:
A. Store products in the original containers and shelter in a suitable environment at
an approved location.
B. Make products readily accessible for inspections and inventory accounting.
2.03 PRODUCT SUBSTITUTIONS:
A. For products specified by generic reference standard, select any product meeting '
such standard.
B. For products specified by naming one or more products or manufacturers, select 1
any named. Submit request for substitution of any product or manufacturer not
specifically named and obtain approval prior to bidding.
C. Provide all information required to support claim of "equality" of product proposed
for substitution. Substitutions will be considered only if equivalent in quality,
efficiency, performance, size, weight, reliability, appearance, and ease of
maintenance to the specified product or manufacturer.
4 -
D. Where approved product substitutions alter the design, space requirements,
electrical requirements, connections, cooling loads, or etc., include all work
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necessary to
provide a
complete
installation of
quality equal to or
better than that
which would
have been
achieved
with products
of manufacturers as specified.
2.04 PRODUCT APPLICATION:
A. Furnish products that are UL listed for their intended use and environment. For
example, use only raintight products suitable for wet locations when installed
outdoors or where indicated on the Drawings to be weatherproof (WP).
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PART 3- EXECUTION
3.01 MANUFACTURER'S DIRECTIONS:
A. Handle, install, connect, test, and operate all products, assemblies, and systems in
accordance with manufacturer's recommendations.
B. In case of conflicting requirements between the manufacturer's directions and the
contract Documents, obtain instructions before proceeding with the work.
3.02 INSPECTIONS:
A. Arrange with the Administrative Authority for inspections of all work required and
obtain approval prior to concealing or proceeding with the work.
' B. Give adequate notice before concealing any work for inspections by the Owner's
representatives. Obtain instructions to proceed before concealing the work.
' 3.03 CLEANING:
A. Keep the premises clean and free from debris, dirt, and etc.
B. Upon completion of the work, clean and polish all fixtures, equipment, and etc.
3.04 WORKMANSHIP:
IA. No person shall perform electrical work on the contract without possessing an
Arkansas State Master or Journeyman License from the Arkansas State Electrical
Examiners Board. All electrical work and apprentice electricians shall be
supervised by a Master or Journeyman Electrician on a one to one ratio.
B. Perform all work in accordance with the best practices of the trade and provide a
"neat" installation by technicians skilled in their respective trades and properly
licensed.
16010-5
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C. Accurately install conduit, and other equipment plumb, level, and true to line with
runs parallel or perpendicular to building lines. Make bends or offsets uniform.
D. Carefully perform all cutting, drilling, digging, and etc., and patch or refinish the
disturbed area to the condition of adjoining or similar surfaces in an approved
manner. Do not cut any structural member without specific approval. Do not cut
any electrical or mechanical lines that may be concealed.
E. Conceal conduit in chases, furrings, or above ceilings unless indicated otherwise.
Flush mount equipment where shown in finished walls where possible. I
3.05 FLAME AND SMOKE CONSIDERATIONS:
A. In ducts or other enclosures used for transporting environmental air, including
return air plenums above ceilings, use only products conforming to NFPA and UL
composite classifications not exceeding 25 for flame spread and 50 for smoke
developed ratings, or install in conduit or approved enclosure. This requirement
applies to all materials including signal cable insulation jackets, finishes, and etc.
B. Completely seal penetrations made through fire and/or smoke rated walls, ceilings,
floors, or other barriers for the passage of conduit with a UL listed material to
preserve the fire/smoke rating of the barrier.
3.06 COORDINATION: '
A. Coordinate the electrical work with the work of related trades to avoid
interference's. Determine the exact route of conduit prior to fabrication and the
exact location of each outlet and equipment enclosure prior to installation.
B. Study the Structural, Mechanical and Electrical Drawings, and Specifications
including Shop Drawings and manufacturer's technical data sheets, and compare
to actual site conditions and constraints. In case of conflicts or interference, obtain
clarification or instructions before performing any work.
C. Piping or equipment requiring slope or specific mounting elevations will generally
have right of way over conduit and other products whose elevations can be
changed.
D. Carefully plan the sequence of work as required to minimize disruptions and '
installation time.
3.07 EQUIPMENT CONNECTIONS:
A. Make all required electrical connections to each item of equipment shown or
16010-6 '
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Ispecified including equipment furnished by Owner, and make operational.
3.08 PROTECTION REQUIREMENTS:
A. Locate existing utility lines and adequately identify and protect during the execution
of the work.
IB. Protect public and private property against damage.
C. Protect all work including building finishes against damage due to dirt, water,
chemicals, frost, heat, handling, theft, and etc. Keep openings in conduit and
equipment closed with suitable plugs or caps during installation.
D. Provide necessary warning devices, barricades, or coverings required for safety
around exposed "live" parts or high temperature surfaces.
' 3.09 CHASES AND OPENINGS:
' A. Provide templates or details for chases and other openings required through
floors, walls, ceilings, and etc. to accommodate conduit.
IB. Provide any necessary cutting or drilling for required openings, and patch and
refinish as directed.
i3.10 PAINTING:
A. Paint conduit, equipment, and etc. exposed in finished areas to match adjacent
surfaces as directed.
B. Paint conduit flat black, or as directed, if visible through grilles or other openings.
C. Paint all exposed conduit and equipment on outside of building or in equipment
rooms for uniform appearance or identification as directed.
D. Paint plywood backboards used for mounting equipment prior to installing
equipment.
E. Touch-up scratches in factory finished surfaces with an approved paint to match
the surface.
1 3.11 TESTING AND ADJUSTING:
A. Test the completed electrical systems and prove free from short circuits, poor
I
16010-7
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
connections, and improper grounding. 1
B. Maintain on the premises a first class voltmeter, ammeter, milli -ohmmeter, and
meggar insulation tester in proper calibration and provide test measurements as
required.
1. Meggar all 600 volt rated wiring at 1000 volts minimum before applying
power. Prove resistance in excess of 10 megohms.
2. Test metal conduit and grounds for continuity and prove resistance less
than one ohm to farthest outlet from system ground.
3. Test system ground to earth per the NEC.
C. Align, adjust, calibrate, and test all systems to assure safe and proper operation. I
D. Verify proper taps on motors for rated performance.
3.12 POST CONSTRUCTION SUBMITTALS:
A. Deliver special tools, and other products necessary for proper operation and
maintenance of the electrical systems.
B. Deliver spare parts as called for under other Electrical Sections contained herein 1
or on the Drawings.
C. Submit Project Record Documents indicating all changes from the Contract i
Documents made during construction.
D. Submit Certificates of Final Inspections from the Administrative Authority.
E. Submit Operation and Maintenance Manuals covering all phases of equipment
and systems provided. Include complete spare parts data with current prices and
sources of supply. Include copy of manufacturing data sheets and shop drawings
required in pre -construction submittals.
F. Submit extended warranties in excess of the standard one year warranty where
required by other Electrical Sections contained herein or on the Drawings.
ii
3.13 INSTRUCTIONS TO OWNER:
A. Provide competent instruction to Owner's personnel covering operation and
maintenance of all electrical systems. Provide specialized instruction by
manufacturer's technical representatives when required. I
16010-8 1
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
3.14 GENERAL WARRANTY:
A. Warrant the electrical installation against defects in products and/or workmanship
for a period of one (1) year from the date of substantial completion.
B. Provide all labor, replacement parts, services, transportation, and incidental costs
necessary for the proper operation of all electrical systems during the warranty
period.
C. Make good any damage to the building or grounds or other equipment resulting
from defects in products and/or workmanship during the warranty period.
END OF SECTION
16010-9
iHVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
RACEWAYS
SECTION 16110
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Conduit and fittings
B. Wireways
C. Sleeves
D. Seals
1.02 RELATED WORK:
A. Section 16010
B.
Section
16120
C.
Section
16190
D.
Section
16195
E.
Section
16450
General Electrical Requirements
Wires and Cables
Supporting Devices
Electrical Identification
Grounding
1.03 SUBMITTALS:
A. Submit Manufacturers data sheets on each manufactured assembly such as
special fittings, modular seals, fire -stop material, and etc.
1.04 QUALITY ASSURANCE:
A. Use only materials that are UL listed for the application and that bear the UL label.
PART 2 - PRODUCTS
2.01 CONDUIT AND FITTINGS:
A. Rigid Metal Conduit (RMC):
1. Heavy wall steel pipe, hot dipped galvanized inside and out, and with ends
factory threaded prior to galvanizing (except at terminations).
16110-1
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2. Use only steel or malleable iron fittings. I
3. Use box connectors with "biting" type locknuts. Use insulated bushings
where wire is larger than #8 AWG. Provide approved watertight hubs in wet
locations.
4. Use threaded couplings or approved unions.
5. Use factory elbows, long sweep where possible. Provide watertight "LB"
fittings with gasketed covers where required. '
B. Electrical Metallic Tubing (EMT) (the term "conduit" also applies to EMT):
1. Zinc electroplated inside and out, and with threadless ends.
2. Use set screw type fittings where concealed in walls, ceilings, etc., and use '
watertight and concrete tight gland and ring compression fittings where
exposed or in concrete. i•
3. Use box connectors with "biting" type locknuts. Use insulated bushings
where wire is larger than #8 AWG.
C Non-metallic Conduit (NMC):
1. Schedule 40 polyvinyl chloride (PVC) electrical conduit with smooth straight
ends.
2. Use couplings and connectors of same material as conduit, and joined with
solvent -cement specifically manufactured for the purpose.
3. Use only RMC elbows with PVC-NMC adapters. PVC-NMC elbows are not
acceptable unless specifically allowed on the Drawings.
4. Use PVC-NMC box connectors only where allowed, such as for floor boxes.
D. Liquidtight Flexible Metal Conduit (LFMC): 1
1. Electroplated steel tubing with extruded PVC jacket equal to "sealtight."
2. Use steel or malleable iron LFMC box connectors with insulated throats and
a threaded grounding cone.
E. Flexible Metal Conduit (FMC):
1. Electroplated steel tubing equal to "Greenfield." I
2. Use steel or malleable iron FMC box connectors with insulated throats and
of type that threads into conduit convolutions.
2.02 WIREWAYS: I
A. Provide wireways properly sized to accommodate the conductors or as shown on the Drawings.
16110-2
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B. Provide wireways of code gauge steel with baked enamel finish. Furnish all
necessary hardware and accessories.
2.03 SLEEVES:
A. Provide Schedule 40 galvanized steel pipe sleeves sized to accommodate the
outside dimension of conduit.
B. Provide integral waterstop collar on sleeves in outside walls.
1 2.04 SEALS:
IA. Where conduit penetrates roof membrane, provide flashing assembly or pitch pan
as recommended by roofing manufacturer.
I B. Where conduit penetrates
outside walls,
make
watertight with oakum and sealant
or provide modular rubber
seal designed
for the
purpose.
1 C. Use conduit sealing compound equal to "Ductseal" or use approved modular
sealing fittings to seal between conductors and conduit where conduit passes from
warm to cold spaces, as well as from the outside.
D. Use 3M "Fire Barrier" or non -shrinking grout to seal between the conduit and
1 sleeve through fire/smoke barriers.
PART 3- EXECUTION
1 3.01 CONDUIT APPLICATIONS:
A. Use RMC for the following applications:
1. Above grade and exposed outdoors
2. Wet locations
3. Risers from under slab or underground, including underground elbows
4. Locations subject to mechanical injury.
1 B. Use EMT for above ground, inside, dry locations not subject to mechanical injury.
C. Use NMC for underground or under slab only.
D. Use LFMC for the final connection to motors, transformers and other adjustable or
vibrating equipment exposed in finished areas or installed in wet or damp
locations.
1 16110-3
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E. Use FMC for the final connection to adjustable or vibrating equipment in dry,
unfinished locations and to lighting fixtures and any other equipment in• lay -in
ceilings.
3.02 INSTALLATION: 1
A. Size raceways for the number, AWG, and type of conductors to be installed therein '
in accordance with the NEC.
B. Install conduit in standard 10 foot lengths except where a shorter section is
required. Make required field cuts square and ream until all burrs are removed.
Field cut threads required for RMC shall be coated with a high zinc dust content
galvanizing repair compound with high electrical conductivity. 1
C. Make field bends in EMT with an approved bending machine or device, and make
free from kinks, dents, or flattened surfaces. Field bends in RMC are not allowed.
Do not exceed 90° in any individual bend nor exceed 360° of total bends or elbows
in any one conduit run. '
D. Maintain at least 6 inches clearance between conduit and hot piping or equipment.
E. Where conduit crosses a building expansion joint, provide a junction box on each
side of the joint and connect with a slack section of FMC, or provide approved
expansion fitting with integral ground jumper.
F. Provide sleeves for conduit through
masonry
or concrete
walls, foundation
walls,
or concrete
beams prior to
laying up
or pouring.
Make
wall
sleeves
flush
with
wall.
G. For core drilled
penetrations in
existing
floors, provide
one inch angle rings or
escutcheons
set
in sealant in lieu
of floor
sleeves.
H
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The Drawings indicate diagramatically branch circuits and feeders required. Install
conduit runs to accommodate the wiring requirements. ; I
END OF SECTION
16110-4
'HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
WIRES AND CABLES
SECTION 16120
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Power wiring and connectors, 600 volts or less
B. Control and signal wiring and connectors
C. Miscellaneous materials
1.02 RELATED WORK:
A. Section 16010
B. Section 16110
C. Section 16190
D. Section 16195
E. Section 16450
1.03 SUBMITTALS:
General Electrical Requirements
Raceways
Supporting Devices
Electrical Identification
Grounding
A. Submit Manufacturer's data sheets for each type of wiring connector proposed for
use.
PART 2- PRODUCTS
2.01 POWER WIRING AND CONNECTORS:
A. Use single conductor annealed copper with 600 volt code type THHN or dual rated
THHN/THWN insulation unless noted otherwise. Use type XHHW stranded
copper wire for isolated power systems when indicated.
B. Minimum wire size is #12 AWG. Where developed distance from panelboard to
first outlet exceeds 65 feet, increase minimum size to #10 AWG.
C. #12 and #10 AWG wire used for lighting, receptacles, and other non -vibrating
equipment may be solid conductor. All other wiring including wiring connecting to
motors, transformers, and special grounding systems shall be stranded conductor.
16120-1
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CITY OF FAYETTEVILLE
II
D. Make splices required in #12 and #10 AWG solid conductor wire with insulated
"Scotchlok" connectors.
E. Make splices in all wire required to be stranded with approved crimp -on or bolted
pressure connectors with snap -on or bolt -on insulated caps.
F. The voltage and temperature ratings of the connector. insulator shall be at least
equal to that required of the conductor insulation.
G. Furnish wire with color coding conforming to the following:
Conductor 250V or Less U
Phase A Black
Phase B Red ,
Phase C Blue
Neutral White
Ground Green i
Color coding may be solid or striped -colored insulation. Colored plastic tape may
be used at terminations on #8 AWG and larger conductors with black insulation.
2.02 CONTROL AND SIGNAL WIRING AND CONNECTORS: 1
A. Use stranded annealed copper conductors with insulation suitable .for the purpose.
B. For applications, 50 volts and greater, use #14 AWG minimum size conductor with
600 volt insulation and approved for the application.
C. For power limited wiring and less than 50 volts, use #18 AWG minimum size
conductor except for multi -conductor cable recommended or required by the
system manufacturer.
D. For power limited wiring in air plenums, use type CLP, CMP or FPLR if not in
conduit for signal, communication, or fire alarm, respectively.
E. For power limited wiring not in air plenums and used for fire alarm and detection
systems, use type FPL.
F. Make splices required in #14 through #10 AWG wire with insulated "Scotchlok"
connectors. '
G. Make slices required in #16 AWG and smaller wire with insulated crimp -on
16120-2 1
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HVAC RENOVATION
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CITY OF FAYETTEVILLE
terminals screw connected to numbered terminal strips, or use approved cable
connectors.
2.03 MISCELLANEOUS MATERIALS:
A. Where required, use wire lubricating compound suitable for the wire insulation and
conduit and that does not harden nor become adhesive. Do not use on wiring for
isolated power systems.
B. Use plastic tape that is flame retardant and cold and weather resistant equal to
Scotch #33.
PART 3- EXECUTION
I
I
3.01 INSTALLATION:
A.
Thoroughly clean conduit prior to pulling -in wires. Do not install wire until the
raceway can be maintained in a dry condition.
B. Use non-metallic pulling ropes attached to the conductors by
means of woven
basket
grips or pulling eyes. Pull all conductors for
a conduit
run in together in
such
a
manner as to avoid
damage to the
conductors,
insulation,
or conduit.
C. Neatly train and nest multiple conductors and cables in boxes and enclosures and
hold in place with "tie -wraps" Where conductors terminate in panelboards,
arrange conductors to be perpendicular or parallel to circuit breaker line-up.
D. Make splices and terminations mechanically and electrically secure. Splices shall
only be made in a suitable accessible junction box.
END OF SECTION
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16120-3
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
BOXES AND ENCLOSURES
SECTION 16130
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Junction and pull boxes
B. Outlet boxes
C. Enclosures
1.02 RELATED WORK:
A. Section 16010
B. Section 16110
C. Section 16140
D. Section 16190
E. Section 16195
F. Section 16450
General Electrical Requirements
Raceways
Wiring Devices
Supporting Devices
Electrical Identification
Grounding
1.03 SUBMITTALS:
A. Submit Manufacturer's data sheets on special enclosures.
PART2-PRODUCTS
2.01 JUNCTION AND PULL BOXES:
A. In dry locations, provide boxes of code gauge steel with galvanized or baked
enamel finish and with bolted or screw attached covers.
B. In damp or wet locations, provide cast metal type FS or FD boxes with watertight
gasketed covers.
2.02 OUTLET BOXES:
A. In dry locations, provide outlet boxes of code gauge galvanized steel. Install
16130-1
HVAC RENOVATION ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
concealed outlet boxes so that work is flush with finished surfaces with no gaps. '
B. Provide galvanized extension rings, plaster rings, fixture studs, and etc. as
required by conditions. ,
C. In damp or wet locations, provide cast metal type FS or FD boxes with gasketed
covers and watertight flip lids as required by device. ,
2.03 ENCLOSURES:
A. Provide code gauge steel enclosures with baked enamel finish as manufactured ,
by Hoffman to facilitate the installation of multiple components such as small motor
starters, contactors, equipment controls, and etc.
B. Furnish with hinged door and captive fasteners.
PART 3 -EXECUTION
,
3.01 INSTALLATION: '
A. Properly size boxes in accordance with the NEC to accommodate the number and
size of conductors and conduits entering the boxes.
B. Size enclosures to adequately accommodate the equipment with space for wiring
and maintenance.
C. Provide junction or pull boxes to facilitate pulling or splicing of conductors so that
no one conduit run will exceed the allowable bends of 360°.
D. All boxes shall be accessible at all times. Provide approved access panels where
required to maintain accessibility.
E. Close any unused knockouts or openings in boxes or enclosures with suitable
caps or covers.
END OF SECTION
1
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16130-2 1
HVAC RENOVATION
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CITY OF FAYETTEVILLE
WIRING DEVICES
SECTION 16140
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Wall switches
B. Receptacles
C. Cover plates
1.02 RELATED WORK:
A.
Section
16010
General Electrical Requirements
B.
Section
16130
Boxes and Enclosures
C.
Section
16190
Supporting Devices
D.
Section
16195
Electrical Identification
1.03 SUBMITTALS:
A.
Submit
Manufacturer's data sheets on each type of device proposed for use.
PART 2- PRODUCTS:
2.01 WALL SWITCHES:
A. Provide single pole, double pole, three way, four way, pilot light, and etc., toggle or
key operated as indicated on the Drawings.
B. Furnish switches of the mechanically silent type rated for 120/277 volts, 20
amperes, with fluorescent or incandescent loads. Use high capacity silver alloy for
switch contacts.
C. Furnish switches with ivory handles unless shown otherwise.
D. Furnish Hubbell Specification Grade Series HBL 1220 switches with screw
terminals and an approved grounding device.
16140-1
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
2.02 RECEPTACLES:
I
A. For general use convenience receptacles, use NEMA 5-20R, back and side wire,
equal to Hubbell Specification Grade Series 5352 for duplex and 5351 for simplex. ,
B. For ground fault circuit interrupter (GFCI) receptacles, use NEMA 5-20R, back and
side wired with test and reset push buttons. Set trip point at 5 ma fault current.
Furnish device equal to Hubbell specification Grade Series GF 5362.
C. For special purpose receptacles for appliances or other equipment, provide NEMA '
type compatible with plug configuration of appliance. Furnish Specification Grade
or better. 1 '
D. Furnish receptacles with ivory face plates unless shown otherwise:
E. For outdoor receptacles subject to long term or permanent continuous unattended
use, provide weatherproof enclosure, the integrity of which is not compromised
when the attachment plug is inserted, per NEC 410-57 (b). Cover shall be equal to
Carton #E9U Series.
2.03 COVER PLATES:
A. Furnish cover plates equal to Sierra Series "P" plastic of color to match device face
unless shown otherwise. Nylon cover plates will not be allowed.
PART 3- EXECUTION
3.01 INSTALLATION:
I
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I
A. Adjust switches and receptacles to mount flush and plumb.
B. Provide cover plates that fit the devices securely and completely cover wall
openings. Properly fill and patch oversized wall openings. For outdoor
receptacles, provide covers with orientation to match receptacle installation, i.e.,
vertical covers for vertical receptacles and horizontal covers for horizontal
receptacles. '
END OF SECTION
U
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16140-2 ,
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
DISCONNECT SWITCHES
SECTION 16170
PART 1 -GENERAL
1.01 WORK INCLUDED:
IA. Fused and non -fused disconnect switches
1.02 RELATED WORK:
A. Section 16010 General Electrical Requirements
B. Section 16190 Supporting Devices
C. Section 16195 Electrical Identification
D. Section 16450 Grounding
1.03 SUBMITTALS:
A. Submit Manufacturer's data sheets on each type of disconnect switch proposed for
use.
PART2-PRODUCTS
2.01 DISCONNECT SWITCHES:
A. For applications requiring 30-1200 amperes rating or for any two or three pole
application, provide NEMA type "HD" (heavy duty) horsepower rated disconnects
with enclosures suitable for the applications, such as NEMA 3R for outdoor
installations.
1. Provide interlock to prevent door operating with switch in "ON" position.
2. Furnish with grounding block.
1 3. Provide for padlocking switch in "OFF" position.
4. Furnish with terminals UL listed for 75°C. wires.
5. Provide Class R, J, or L fuse provisions as applicable for fusible switches.
' Provide feature to reject Class H fuses.
6. Furnish with factory baked enamel finish.
B. For fractional horsepower 120 volt motors with integral overload protection, as well
as other 120 volt equipment protected at 20 amperes or less, use specification
grade single pole switch in outlet box with minimum ratings as follows:
16170-1
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
1. Horsepower rated for one horsepower
2. 120/277 AC volts
3. 20 amperes
PART 3 -EXECUTION
3.01 INSTALLATION:
A. Provide disconnect switch for each fixed appliance or motor load indicated on the
Drawings or required by the NEC. Install switch in sight of and within 50 feet
maximum of equipment it serves.
B. Generally, install 30 ampere or more rated switches with the top 5 feet above floor
or grade.
C. Install 20 ampere rated switches with center 4 feet above floor.
END OF SECTION
P
16170-2
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
SUPPORTING DEVICES
SECTION 16190
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Anchors
B. Hangers and supports
1.02 RELATED WORK:
A.
Section
16010
General Electrical Requirements
B.
Section
16110
Raceways
C.
Section
16130
Boxes and Enclosures
1.03 SUBMITTALS:
A. Submit for approval Contractor's shop drawings indicating shape and dimensions of
plywood backboards and concrete bases when necessary for clarity and
coordination with other trades.
PART 2- PRODUCTS:
2.01 ANCHORS:
A. Size anchors for minimum safety factor of two times recommended load. Use only
corrosion resistant materials.
B. In existing concrete or solid masonry, use Phillips "Redhead" expansion shields or
Elcen self drilling expansion shields. Use power driven fasteners only for light loads
and with specific approval.
C. In hollow masonry, use steel toggle bolts.
D. On structural steel, use approved beam clamps or direct weld.
E. In wood, use wood screws or lag screws or through -bolt with nuts and washers.
G. In sheet metal, use self tapping sheet metal screws or machine bolts with washers
and nuts.
16190-1
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
11
H. In bar joists, use threaded hanger rod between bottom angles secured with
washers and nuts.
2.02 HANGERS AND SUPPORTS: ,
A. For multiple conduit runs, use trapeze hangers consisting of P-1000 "Unistrut"
channels with pipe clamps and steel hanger rods where suspended.. Anchor
"Unistrut" to wall where multiple runs are wall mounted.
B. Support individual conduits with malleable iron one -hole conduit clamps, steel
two -hole pipe straps, or split ring steel conduit clamps. Wire, perforated iron strap,
or steel one -hole clamps will not be acceptable. '
C. For free standing boxes and enclosures, provide steel angle frame constructed to
prevent any strain on conduits entering box. '
D. Support conduit through floors with steel riser clamps.
E. Support conduit on flat roofs with 4"x4"x2' redwood blocks with steel straps loosely
clamped to conduit, or a pipe supporting assembly approved by the roofing
manufacturer.
F. Support outlet boxes occurring in lay -in ceilings with approved bar hangers '
clamped to ceiling grid to prevent any weight from bearing on ceiling tile.
G. Support conductors in vertical raceways with approved split -wedge type cable
supports. Support multiple conductors with approved cable clamps and "tie -wraps." '
PART 3 - EXECUTION I
3.01 INSTALLATION: '
A. Install anchors in accordance with manufacturer's recommendations but sized to
accommodate at least twice the actual load. Oversized holes that may weaken the
installation will not be acceptable.
II
B. Support all boxes and equipment enclosures directly by the building structure
independently of the conduit.
C. Support conduit independently by the building structure at intervals complying with
the NEC. Do not support conduit from piping, ductwork, or suspended ceiling
hangers.
16190-2
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
D. Support conduit without sagging to provide drainage of condensation.
E. Permanently and securely support conduit, boxes, and enclosures before installing
any wiring.
END OF SECTION
16190-3
HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
ELECTRICAL IDENTIFICATION
SECTION 16195
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Equipment nameplates
B. Name tags
C. Circuit directories
D. Self -adhering labels
E. Wire markers
1.02 RELATED WORK:
A. Section 16010 General Electrical Requirements
1.03 SUBMITTALS:
A. Submit for approval, Manufacturer's data sheets on each manufactured identifying
device.
B. Submit for approval, a schedule of nameplates to be affixed to each item.
1.04 QUALITY ASSURANCE:
A. Approved manufacturers are Seton and Brady.
PART 2 -PRODUCTS
2.01 NAMEPLATES:
A. Identify each major component and controller (except light switches) as it is named
on the Drawings with engraved nameplates made from laminated plastic sheets
equal to Seton Style 2060.
1. Furnish with white letters on black background except for other color coded
requirements.
2. Provide appropriate size nameplates with information easily readable.
Generally, furnish 3/4" high nameplates with 3/8" letters for major
16195-1
HVAC RENOVATION
ADMINISTRATION BUILDING '! '
CITY OF FAYETTEVILLE
equipment such as switchboards, panelboards, transformers; and 1/2" high
nameplates with 1/4" letters for minor equipment such as disconnect
switches, contactors, starters, emergency power receptacles and etc.
2.02 NAMETAGS: 1
A. Identify each outlet box of empty conduit system by affixing a write -on vinyl name
tag equal to Seton Style PTOB to each end of pull wire installed in each conduit.
Indicate purpose of empty outlet box such as "telephone" with location of pull wire
termination such as "main terminal board."
B. Identify conductors terminated in junction box or outlet box intended for future
connection. Provide write -on vinyl name tags indicating panelboard and circuit I
number or location of source.
2.03 CIRCUIT DIRECTORIES: i
A. Fill out circuit directory cards for cardholder slots inside panelboard doors. Provide
typewritten directory indicating function and location served for each circuit used.
B. Identify undesignated spare circuit breakers by writing the word "spare" in soft
pencil in the blank for that circuit number. Leave blank the description line for ..
uninstalled circuit breakers (spaces).
2.04 LABELS: '
A. Identify each junction box and conduit exposed in equipment rooms or accessible
above lay -in ceilings or behind access doors with permanent self -adhering orange
labels equal to Seton "Opti-Code.".
B. Indicate voltage class such as "120/208 volts" or the type of signal cable installed ,
therein such as "telephone."
2.05 WIRE MARKERS: '
A. Provide permanent self adhesive wire markers on each conductor in panelboards
or other equipment enclosures.
B. Indicate the circuit number or terminal number to which the wire is connected. I
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
PART 3- EXECUTION
3.01 INSTALLATION:
A. Attach nameplates with approved adhesive on plastic surfaces and factory baked
enameled surfaces only. Attach nameplates with proper screws on all other
surfaces.
B. Attach name tags to pull wires or conductors with nylon cord or other approved
method.
C. Install typewritten circuit directories in appropriate card slots.
D. Install identifying labels on conduit where it enters or leaves a wall or floor and at
other intervals not to exceed 20 feet.
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E. Install wire markers so that information is easily visible.
END OF SECTION
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
GROUNDING
SECTION 16450
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. Equipment grounding and bonding
B. System grounding
1.02 RELATED WORK:
A. Section 16010 General Electrical Requirements
B. Section 16110 Raceways
C. Section 16120 Wires and Cables
D. Section 16130 Boxes and Enclosures
1.03 SUBMITTALS:
A. Submit certified test report of grounding electrode resistance.
PART 2- PRODUCTS
2.01 GROUNDING WIRES:
A. Provide insulated grounding conductors and jumpers sized in accordance with the
NEC but no smaller than #12 AWG. Identify with continuous green insulation or
with green tape at each termination.
PART 3- EXECUTION
3.01 INSTALLATION:
A. Bond the entire metal raceway system including conduit, boxes, enclosures,
equipment frames, motor housings, and etc. System to be mechanically and
electrically continuous throughout installation.
B. Bond grounding conductor to conduit at the entrance and exit from that conduit
containing only the grounding conductor.
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
C. Install grounding jumper from connector bushings to equipment grounding bars.
Bond grounding bars and lugs to housing.
D. Install separate grounding conductor in all raceway systems.
E. Bond the grounding wires to each box and enclosure through which they pass.
END OF SECTION
16450-2
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HVAC RENOVATION
ADMINISTRATION BUILDING
CITY OF FAYETTEVILLE
MOTOR STARTERS, FULL VOLTAGE
SECTION 16481
PART 1 - GENERAL
101 WORK INCLUDED:
1 A. Magnetic starters
B. Manual starters
1.02 RELATED WORK:
• A. Section 16110 General Electrical Requirements
B. Section 16130 Boxes and Enclosures
IC. Section 16190 Supporting Devices
D. Section 16195 Electrical Identification
E. Section 16450 Grounding
1.03 SUBMITTALS:
A. Submit Manufacturer's data sheets for each type of motor starter proposed for use.
B. Submit complete wiring diagrams of each type of magnetic motor starter.
' PART2-PRODUCTS
2.01 MAGNETIC STARTERS:
' A. Provide full voltage AC magnetic starter equal to Square D Class 8536 for each
integral horsepower motor, polyphase motor, or motor started by a remote or
automatic device. With each starter, furnish the following:
1. 120 volt holding coil with fused control transformer.
'• 2. Grounding lug.
3. "HAND -OFF -AUTO" (HOA) switch and pilot light. Provide remote
START -STOP push buttons where shown.
4. Melting alloy overload heaters for each phase leg. Provide ambient
compensated overload heaters when installed outdoors or other
untempered areas where required.
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CITY OF FAYETTEVILLE
5. A minimum of one normally open (N.O.) and one normally closed (N.C.)
auxiliary contacts.
6. Enclosure suitable for the environment. When more than one starter is
located together, provide one enclosure for the group of starters.
B. Where indicated on the Drawings, provide AC combination starters equal to
Square D Class 8538. With each combination starter, furnish all accessories
called out in A.1 -A.5 above, plus the following:
1. Disconnect switch
2. Fuse clips
3. Enclosure suitable for the environment
C. Where indicated on the Drawings, provide AC two speed magnetic starters equal
to Square D Class 8810 with form R3 decelerating relay/timer. With each two
speed starter, furnish all items called out in A.1 through A.6 above except.furnish
overload heaters for each speed.
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2.02 MANUAL STARTERS: '
A. For fractional horsepower, single phase, manually started motors, provide manual
starter equal to Square D Class 2510 with pilot light and melting alloy thermal unit.
PART 3 -EXECUTION
3.01 INSTALLATION:
A. Size starters for nameplate motor horsepower. '
B. Size overload heaters for running overload protection based on nameplate amps,
motor service factor and ambient temperature.
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END OF SECTION
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