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• This session will cover basic pump design and pump application, review basic fire pump room design, and review NFPA 20 including new changes in 2003 along with existing code information.
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Split Case Fire Pumps Inline Fire Pumps Vertical Turbine Fire Pumps
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Split-Case Design simplifies maintenance and repair. Removable Top Casing Half
Lower Casing Half, Base Mounted, with Discharge and Suction Flanged 5 Connections
Bypass lines to stuffing box are within castings (except 490 series)
Integrally cast bearing arms (except 490 series)
Oversized shafts
Line boring of assembled casings 6
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•Computer controlled machining •Line boring of assembled casings •Oversized shafts
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• Ease of Installation and Maintenance • Longevity and Durability • Serviceability • Reliability 8
Electric Split Case
• Capacities from 250 to 5000 GPM • Warehouse • Hospital • Manufacturing plant • University or large school • Office High Rise 9
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Diesel Fire Pumps • Remote field locations that do not have electricity • Hospitals 100% back up
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Vertical Split Case
• Capacities to 2500 GPM • Space Savings, Retrofits • Good Specification Item! 11
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Computer controlled machining
Back pull-out feature
No base, coupling, or guard
Self-venting 13
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Requires less space than split case
pump of the same capacity Less expensive Motor can be serviced without
disconnecting suction & discharge flanges from piping 15
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Capacities to 1500 GPM Small schools
Churches Parking
garages 16
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No priming Adaptability to water level Adaptability to various driver combinations Compact “footprint” No alignment necessary Minimal maintenance
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Vertical Turbine
Fire Pumps 19
Vertical Turbines Applications where city water is not available Ponds and lakes to utilize water supply Only pump approved for suction lift conditions 20
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The jockey pump or pressure maintenance pump is intended to maintain the system pressure only. It is generally sized about 1% of the flow of the main fire pump. The jockey pump prevents the main fire pump from starting when small leaks for packing drips occur throughout a system. The set pressure is generally 15 to 20 PSI above that of the main fire pump.
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Regenerative Turbine Pumps
Vertical Multi-stage
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Electric Fire Pumps • • • • • •
Pump, base, coupling & guard Electric motor Controller - motor Suction and discharge gauges Automatic air release valve Casing relief valve 24
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Diesel Fire Pumps • • • • • • • •
Pump, base, coupling & guard Diesel engine & fuel tank Controller - engine Suction and discharge gauges Automatic air release valve Batteries, racks & cables Cooling loop Commercial grade muffler, flexible exhaust connector & fittin s
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Testing Accessories Test manifold with hose valves,
caps and chains Flow meter
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Accessories that are not included but may be required: Main relief valve
Waste
cone 27
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Maximum
BHPr of pump shall not exceed the nameplate rating of the motor by more than 15% at the rated voltage.
No
overload is permitted on TEFC or explosion-proof motors having a 1.0 SF. 28
The engine must be specifically
labeled for fire pump service by a nationally recognized testing laboratory.
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Accommodate all styles of pumps,electric or diesel Designed specifically to meet the particular application requirements Built to NFPA 20 Standards 33
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Single source responsibility Manufacturer takes full
responsibility for all aspects of design and engineering Less time required on
the job site Fixed cost 34
Single Point Electrical Connection Ventilation
A/C Louver & Exhaust Fan
Combustion Air
Emergency Lighting Exterior High Pressure Sodium Light Ceiling Hatch for Vertical Turbines PE Stamp Available
D/C Louver
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Engineering team located at the factory Aurora is a proven leader in Fire Pumps All systems are hydrostatically tested Facilities capable of full performance test Third party listed with ETL 36
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Hear No Evil - Speak No Evil - See No Evil
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All Pump Salesmen Are Not Created Equal!!!
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National Fire Protection Association (NFPA)
Underwriters Laboratories, Inc. (UL)
Factory Mutual Research Corporation (FM)
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NFPA • NFPA Mission: to safeguard people, property and the environment from destructive fire • NFPA Standards and Codes • NFPA 20: the standard for Centrifugal Fire Pumps • NFPA 20 Performance Requirements: – 65% of rated head at 150% of rated flow – Shutoff Head does not exceed 140% of rated head • NFPA 20 Testing Requirements: – Factory Certified Performance Test – Field performance test • NFPA 20 and Equipment Qualification
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Mandates the performance of:
Fire Pump Driver (Diesel or Electric Motor Drive) Fire Pump Controller
Outlines:
Acceptance Testing Performance Maintenance
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F.M. and U.L. are testing organizations:
All U.L. listed pumps have this label affixed to the pump.
All F.M. approved pumps have this label affixed to the pump. 47
UL lists and
approves equipment for fire pump service
UL witnesses testing of fire pumps for
specific flow rates Follow-up
audits 48
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Factory Mutual is an insurer in addition
to being an approval agency. Factory Mutual approves and tests all types of fire pump and fire system equipment. Factory Mutual also approves installation & design of fire pump and fire protection systems. This a requirement on an FM insured project. 49
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Fire pumps shall have the following rated capacities in GPM, and net pressures of 40 PSI or more. Found in table 5.8.2 of NFPA 20
25 GPM
400 GPM
2000 GPM
50 GPM
450 GPM
2500 GPM
100 GPM
500 GPM
3000 GPM
150 GPM
750 GPM
3500 GPM
200 GPM
1000 GPM
4000 GPM
250 GPM
1250 GPM
4500 GPM
300 GPM
1500 GPM
5000 GPM
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Factory and Field Performance 6.2.1 & 2 NFPA 20 Pumps shall furnish not less than 150% of rated capacity at not less than 65% of total rated head. The shutoff head shall not exceed 140% of rated head for any type pump. 52
Shutoff Head
Design Point
150% Point
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Each fire pump is hydrostatically tested at: 1.5 x Sum of pump’s + Maximum allowable shutoff head suction head (but in no case less than 250 psi) Each pump is tested to
determine maximum horsepower requirements. 54
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Some decisions are left up to the Authority Having Jurisdiction. In most instances, this is either the State Fire Marshall, or the Fire Chief at the Local Fire Department. Low suction cutoff panels, limited service fire pump controllers, and suction regulating valves are some examples of items commonly regulated by the AHJ.
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• In 2003, NFPA changed to an international format, which changed the chapters throughout the standard. • 2003 was also the first year that the four year cycle was used.
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• Variable Speed Pressure Limiting Control. – Only two requirements were listed. 1. The equipment be listed for fire service. 2. If the unit failed, the pump would run at full speed.
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• Relief Valves for Centrifugal Pumps – – – –
Required? Not Required? Rules that govern? A new requirement!
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• ???
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• Where a variable speed pressure limiting control driver is installed, a pressure relief valve shall be installed.
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• Electronic Fuel Management Control – Engines that incorporate an electronic control module (ECM) to accomplish and control the fuel injection process shall have an alternate ECM permanently mounted and wired so the engine can produce its full rated power output in the event of a failure of the primary ECM. 62
• A listed pressure recording device shall be installed to sense and record the pressure in each fire pump controller pressure sensing line at the input to the controller.
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• Where the alternate source is supplied by a generator whose capacity exceeds 225 % of the fire pump motor’s rated full load current, the controller shall be equipped with the alternate side circuit breaker and isolating switch in accordance with 10.8.2.1.3 64
• State of Readiness – The controller shall be in a fully functional state within 10 seconds upon application of ac power.
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• Equipment protection. – Indoor fire pump units shall be physically separated or protected by fire rated construction in accordance with Table 5.12.1.1
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• Means shall be provided on the exterior of the controller to read all line currents and all line voltages within plus or minus 5% of full scale.
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• States that all electrical wiring to the fire pump motor, including control inter wiring, normal power supply, alternate power supply where provided, and jockey pump, shall be completed and checked by the electrical contractor prior to the initial startup and acceptance test. 70
• For radiator cooled engines, the radiator discharge shall be ducted outdoors in a manner that will prevent recirculation.
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• As a minimum, no fewer than six automatic and six manual operations shall be performed during the acceptance test.
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• A fire pump driver shall be operated for a period of at least five minutes at full speed during each of the operations required in 14.2.7 (which is the field acceptance test)
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• The installing contractor shall furnish a certificate for flushing and hydrostatic test prior to the start of the fire pump field acceptance test.
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• In part – A jockey pump should be sized to make up the allowable leakage rate within 10 minutes or 3.8L/min (1 GPM), whichever is larger.
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