Memorial Hermann Best Practices
July, 2013
SECTION 21 31 13 ELECTRIC-DRIVE CENTRIFUGAL FIRE PUMP
PART 1 - GENERAL
1.01 WORK INCLUDED
A. Comply with the provisions of Section 21 05 00.
B. Fire pump system shall be complete with pump, drives, controller, and accessories. Pumping unit shall be UL listed and FM approved. Fire pump to deliver not less than 150% of rated capacity at a pressure not less than 65% of rated head. Shutoff pressure should not exceed 120% of the rated pressure. Jockey pump shall deliver 1% of gpm and 10 PSI TDH more than fire pump.
C. Furnish and install a UL/FM listed fire pump controller with integral UL/FM listed automatic transfer switch with isolation means meeting requirements of NFPA 20. The transfer switch shall be interlocked with the emergency generator to start the generator on loss of normal power. The fire pump controller shall contain a closed, transition wye delta reduced voltage starter. If scope of work is in existing facility, contractor shall match existing manufacturer.
D. Provide remote fire pump controller alarm panel.
1. Locate alarm panel at P.B.X. (24-hour) or other 24-hour manned station or off-site as directed by construction drawings.
2. Provide off-site monitoring at an approved central station. Coordinate required signals and power wiring with Division 26 and 27
1.02 RELATED WORK
A. Section 21 05 20: Fire Extinguishers, Fire Valve and Cabinets
B. Section 21 13 13: Fire Suppression Sprinkler Systems
C. Division 26: Electrical
1.03 CODES
A. NFPA 20: Centrifugal Fire Pumps
B. NEC, NFPA 70: National Electric Code
C. Applicable State, Local or Model Building, Fire or Plumbing Codes
1.04 SUBMITTALS
A. Submit product data for approval by Architect in accordance with Section 21 05 00.
PART 2 - PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS
A. Fire pump and motor:
1. Fairbanks Morse
2.
3.
Peerless.
Aurora
4.
5.
Patterson
Allis Chalmers
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Memorial Hermann Best Practices
July, 2013
B. Jockey Pump:
1.
2.
3.
4.
Allis Chalmers
Pearless
Aurora
Paco Turb
5. Grundfos
C. Fire Pump Controller/Automatic Transfer Switch Combination: Firetrol, Metron, Master Controls,
Joslyn-Clark.
2.02 FIRE PUMP AND MOTOR
A. Pump type: Horizontal split-case, bronze fitted, single-stage, double-suction centrifugal pump.
Pump, driver and accessories shall be furnished as a complete unit by one supplier.
B. Pump unit shall meet all requirements of NFPA-20 and shall be U.L./FM approved.
C. Mounting: Mount pump and driver on a common base plate of either cast iron or fabricated steel and direct connected through a flexible coupling.
D. Driver: Electric motor of the open dripproof type and wound for reduced voltage starting; voltage as scheduled on drawings. Motor shall be of such capacity that 115% of full-load amp rating shall not be exceeded at any condition of pump load.
E. Motor design: Design for a temperature rise not exceeding 40 degrees C when carrying full rated load continuously. Capable of operating continuously with an overload of 15% without stress of injurious rise in temperature. Locked rotor current shall not exceed the values specified in NFPA-
20.
F. Bearings: Anti-friction ball or roller type.
G. Pump capacity: As shown on plumbing drawings.
2.03 ACCESSORIES
A. The following accessories shall be included with pump unit:
1.
2.
3.
4.
Eccentric reducer
Blind flange
Hose valve head
Hose valves, caps, and chain with local Fire Department hose thread (test manifold
5.
6.
7. connection)
Casing relief valve, size based on pump size
Suction and discharge gauges
Automatic air release valve
2.04 CONTROLLER/TRANSFER SWITCH
A. The fire pump controller and transfer switch may be assembled as a combined unit or a separately assembled unit, wall mounted adjacent to the controller as provided in Section 7-8 of
NFPA 20. The transfer switch shall be rated in accordance with paragraph 7-8.3.3, NFPA 20, and suitable for switching the motor locked rotor current.
B. The fire pump starter shall be full voltage magnetic type for 30 HP and below. The fire pump starter shall be a closed transition wye-delta reduced voltage starter for above 30 HP.
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Memorial Hermann Best Practices
July, 2013
C. The jockey pump starter shall be combination magnetic full voltage.
D. Fire pump and jockey pump motor controls shall be completely assembled, wired, and tested by the manufacturer before shipment from the factory and shall be appropriately labeled. Controller shall be marked "Fire Pump Controller" and "Jockey Pump Controller".
E. Main contacts shall be mechanically interlocked to allow only (2) possible positions: Normal and emergency.
F. Transfer switches shall be in NEMA-1 wall mounted enclosures. All control relays shall be accessible from front of enclosure for maintenance and repair. Transfer mechanism shall be electrically operated, mechanically held. Failure of the emergency source shall result in retransfer to the normal source. The transfer switch shall be equipped with manual operator to allow for manual transfer. Engine starting contacts shall be provided to start the emergency generator, should the voltage of the normal source drop below the preset value, after a time delay of 1-3 seconds to allow for momentary dips. After restoration of normal power, transfer switch shall remain in emergency position for an adjustable period of 0-45 minutes. After retransfer to normal, engine/generator to continue to run for an adjustable period of 0-5 minutes to allow for cool down.
A voltage/frequency relay shall be provided to prevent transfer to the emergency source until operating level is attained.
G. In addition to position indicating lamps, auxiliary contacts shall be provided (one normally open, one normally closed).
H. Provide test switch to simulate a power failure, under load conditions.
1.
2.
Transfer switches used with ground fault equipment; shall be 3-pole with overlapping neutral contacts.
Provide an isolation switch (discount, not by-pass) on the emergency side of the transfer switch with facility to operate an audible local and remote alarm when the isolation switch is in the open position.
I. Switches shall be double throw actuated by a single operator, momentarily energized. Main contacts may be replaced without major disassembly. Transfer time not to exceed 1/2 second in either direction. Arcing contacts with magnetic blow outs shall be provided on each pole. Normal voltage sensing shall be on 3-phase with pickup at 95% and drop-out at 90% of normal voltage.
Both valves shall be independently field adjustable.
J. The controllers may be either the combined manual and automatic type incorporating the following:
1.
2.
Disconnect switch: Externally operable, quick-break type.
Circuit breaker: Time delay type with trips in all phases set for 300% of the motor full-load
3.
4.
5.
6.
7.
8. current. Capacity of circuit breaker shall be 100,000 amperes RMS or in accordance with local utility company's specifications. Provide higher A/C rating where available fault current exceeds this rating.
Pressure switches.
Running period timer: Set to keep motor in operation when started automatically for a minimum of one minute for each 10 HP motor rating but not to exceed 10 minutes.
Jockey pump shall also have a minimum running timer.
Pilot lamp: To indicate power available and pump run.
Ammeter test link and voltmeter test studs.
Alarm relay: To energize a local and remote audible and visible alarm through an independent source of power to indicate loss of power, pump run, phase reversal and isolation switch open. Provide a remote alarm at a 24 hour attended location as indicated on drawings. Install transformer as required.
Manual selection station: A two position station shall be provided on the enclosure marked "Automatic" and "Non-Automatic".
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Memorial Hermann Best Practices
July, 2013
9.
10.
Means shall be provided on the controller to operate an alarm signal continuously while the pump is running. The fire pump shall be interconnected with the building fire alarm system.
The fire pump “run” status shall also be communicated to the building control system for notification purposes only.
2.05 ANNUNCIATOR
A. Provide a remote U.L. listed fire pump annunciator as required by NFPA 20.
PART 3 - EXECUTION
3.01 COORDINATION
A. Coordinate installation with other Divisions, including Division 26, to insure that a complete, operable system meeting the intent of these specifications and the plans is provided.
3.02 INSTALLATION
A. Provide and install system in location as shown on contract drawings.
B. Prior to start up, test all piping connections to insure that they are adequate.
C. Check motor leads to insure proper phase.
D. Prepare and test pump to assure that it meets capacity as specified.
E. Be prepared to demonstrate to Owners, Owner's Insurance representatives, and local code or fire officials that pump meets capacity requirements as required by codes being enforced in their jurisdiction. Provide written documentation of certifications, capacities, and test curve data to owner and engineer.
F. Provide wiring and conduit to interconnect the start contacts on the emergency generator and the auxiliary contacts on the automatic transfer switch.
G. Locate remote annunciator at a 24 hour manned location as shown on the drawings.
END OF SECTION
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