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STATIONARY PUMPS FOR FIRE PROTECTION

1. 34 Fig 2 4 1 1 1 Clarke notification 36 Fig 2 4 1 1 2 Clarke notification to Factory Mutual Research 2 37 Fig 2 4 1 1 3 Clarke instructions for governor spring replacement 38 qw FR 39 P 39 MER PI 92 uuu u Sumu 40 r ammi gt mnc 41 loka 2002 Factory Mutual Insurance Company All rights reserved No part of this document may be reproduced stored in a retrieval system or transmitted in whole or in part in any form or by any means electronic mechanical photocopying recording or otherwise without written permission of Factory Mutual Insurance Company 3 N 13 4N Page 2 Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig 2 4 1 2 2 2 4 1 2 3 2 4 1 2 4 2 4 1 2 5 2 4 1 2 6 2 4 1 3 1 2 4 1 3 1 2 4 1 3 2 2 4 1 3 2 2 4 1 5 1 2 4 1 5 1 Stationary Pumps for Fire Protection FM Global Property Loss Prevention Data Sheets Cummins campaign 8422 description 42 Old fuel return arrangement 2 43 New fuel return arrangement 44 Fuel flow diagram V 378 F V 504 F engines 45 4 lp dn e 45 Cummins camp
2. 3 X AUTHORIZATION 1 2 5 JE Dlr D SEVERITY CODE 3 2 2 3 Intl I FAILURE CODE 3 2 3 iP 65 Fig 2 4 1 3 2 Cummins campaign 8532 listing cont d 02002 Factory Mutual Insurance Company All rights reserved e e e e Columbus Indianapolis Kansas City Memphis Columbus OH CIC Edmonton Portugal pedham Daventry Columbus 3 7 Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 51 2 4 1 5 Cummins Engine Company Inc Service Parts Topics 93T8 2 Safety Campaign 9209 Models 6BTA5 9 F1 and 6BTA5 9 F2 Fire Pump Engines first published September 1993 RECOMMENDATION When Cummins Engine Company Inc Model 6BTA5 9 F and or 6BTA5 9 F2 engine is located check that the engine data tag has been stamped 9209 which indicates the modification has been completed the modification has not been completed arrangements should be made with the local Cummins distributor to complete the modification under Safety Campaign 9209 without delay DISCUSSION Cummins Model 6BTA5 9 F and 6BTA5 9 F2 fire pump engines rated 1760 RPM and built before engine serial number 44764160 experience a resonance on belt tensioners which causes premature fan belt failure Engines rated at 2100 RPM are not affected Loss of belt results in overheating eventually causing the engine to seize and stop Fre
3. 895 Note that the following section numbers are referenced to NFPA 20 with the DS3 7N numbering format resum ing with Section 2 3 Fire Pumps for High Rise Buildings 1 6 Unit Performance The pump manufacturer shall be responsible for 1 furnishing the complete unit consisting of pump driver controller transfer switch equipment and all necessary accessories 2 ensuring proper installation and per formance during pump acceptance tests and 3 resolving all problems that may arise during installation and or acceptance tests Any sale or transfer of design packaging or delivery of the unit does not relieve the pump manufacturer of its responsibility If a pump physically leaves the manufacturer s facility with the FM Approval mark it is implicit that any third party receiving the unit is an authorized representative of the pump manu facturer and the pump manufacturer and the authorized representative shall assume the responsibilities described above 2 1 Water Supplies 2 1 1 Reliability No new cross connections between potable and nonpotable water supplies should be installed Additional guidance regarding cross connections is contained in FM Global Data Sheet 3 3 Cross Connections 2 1 2 Sources Where an oversize pump has been installed the pump should at least satisfy the water demand without drawing the residual pressure at the pump below the pressure allowed by the regulatory authority A number of states
4. Global 3 N Property Loss Prevention Data Sheets 13 4N September 2001 Supersedes January 2001 Page 1 of 53 STATIONARY PUMPS FOR FIRE PROTECTION Table of Contents EE 1 1 General Ee 3 1 2 Changes from Previous Edition 3 2 0 LOSS PREVENTION RECOMMENDATIONS 0 004 222 5 CN cio NEEN 5 Mell Ver SUS eee 5 2 1 2 Authority Having Jurisdiction 2040 U U uuu u 5 2 1 3 Related NFPA or Other Standards 2 5 2 1 4 Listed or FM Approved 5 2 2 Comments and Exceptions to 20 6 2 2 1 20 Stationary Fire Pumps for Fire Protection 1999 edition 6 2 3 Fire Pumps for High Rise Buildings 30 roe a gt 30 2 9 2 PUMP Arrangemeni u Gece tien 31 O gan S ns 33 2 3 4 Power Supply o 33 2 4 FM FM Global Equipment Alerts 34 2 4 1 Diesel Engine Drivers List of Figures Fig FM A 2 3 Water supply graph 2
5. Normalt x rmolly rmolly Closed e Grade Fire Dept Supply Connection k Fill Pump Fig FM 2 3 b Single zone gravity system Grovity Valve __ Needed Valve Closed A Normally Open 275 84 Grode Fire Dept ae Supply Connection lt Fire Pump If Needed Fig FM 2 3 c Single zone system two supplies 2002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 33 volve Normoily Closed Valve Normoliy Open Gravity if Needad Voi Valve Normally 550 168m Normally d Closed Mox Open pen 275 84m Mox Fire Connection 7 Low Zone Fire Pump High Zone F ire Pump Fig FM 2 3 d Two zone system Figure FM 2 3 d illustrates a two zone system for building having maximum height of 550 ft 168 m This system includes minimum of two fire pumps each connected to the public water supply If two water sup plies are necessary each zone would have the second parallel a gravity tank at the top The grav tank may be refilled by the fire pump for that zone or a separate tank filling pump Figure FM 2 3 e illustrates an alternate two zone system The low zone fire pump is located on the lower ser vice floor and connected to th
6. Engines which are subjected to ambient temperatures less than 40 F 5 C should be equipped with lubri cating oil heater When using such heater immersed in oil the maximum surface temperature of the heater in contact with the oil should be less than 300 F 149 C This will minimize the formation of hard carbon on the heating element Shielded types of oil heaters generally meet this criterion The engine manufactur er s recommendation for heaters to maintain 120 F 49 water and oil temperatures in ambient tempera tures less than 40 F 4 C should be followed Controllers of engines which are subject to ambient temperature conditions less than 70 F 21 C during power failures should be equipped with power failure relay to start the unit upon loss of current output of the battery charger Running the unit will maintain the oil and cooling water temperatures necessary for opera tion Running the unit will also provide minimal flow through piping to help avoid freezeups See FM Global Comment relating to NFPA 20 Section 9 4 2 9 1 Application Automatic Controllers Automatic controllers are available for internal combustion fire pump engines The standards for construction location electric wiring alarms and methods of actuation are the same as for FM Approved electric controllers All FM Approved automatic controllers are equipped with manual starting and stopping switches on the outside of the enclosure 2002 Factory Mutual
7. in 12 7 mm drain valve 11 Pressure gauge 12 Drain tee Public main OS amp Y suction valve Booster pump Discharge check valve Pilot controlled valve Install before or after discharge check valve 6 Discharge vaive Fig FM A 2 1 2 Arrangement for pilot controlled hydraulically actuated minimum suction pressure regulating valve Sprinkler Systems FM Global Data Sheet 4 4 Standpipe and Hose Systems and any relevant indi vidual occupancy Data Sheet which addresses water demands for the occupancy ies involved A 2 3 The maximum pressure used in the design of fire protection systems supplied by fire or booster pumps should be pump rated pressure plus suction pressure at rated flow In Figure FM A 2 3 Curve A represents the theoretical characteristic curve for a 1500 75 psi rated hori zontal fire pump taking suction from the source shown by E Curve B is more typical of actual pump perfor mance Many pumps will not provide 12096 of rated pressure at shutoff churn Demand point C represents a high volume moderate pressure system The demand can be supplied by the pump Demand point D rep resents a low volume high pressure system The actual pump performance cannot meet the demand 1 gpm 3 8 litres min 1 psi 6 9 kPa 069 bars 2 7 Equipment Protection Automatic sprinklers should be provided in detached pump rooms of combustible construction and in inter nal combustion engine driven pump areas regardless
8. FM A 4 2 2 2 b FM 4 2 2 2 2002 Factory Mutual Insurance Company All rights reserved 3 N 13 4N Stationary Pumps for Fire Protection Page 12 FM Global Property Loss Prevention Data Sheets 33 35 Eh riti EST EP E i pr Hi EJ Fig FM 4 1 1 Water lubricated vertical shaft turbine type pump 02002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 13 TYPICAL PIN TYPE NONREVERSE RATCHET COUPLING A Ratchet plate Stationary part Coupling drive bolt Con of motor nects top half coupling 1 Top shaft adjusting nut with lower half coupling Ratchet pin Engages slot in 3f Hollow shaft key Con ratchet plate to prevent reverse motor shaft rotation to lower half coupling Gib key Keys top half coup 3g Motor hollow shaft ling to top shaft 19 Top shaft Top half coupling Lower half coupling Carries ratchet pins Fig FM 4 1 1 cont Section A NON Dam Ke TYPICAL FLANGED COLUMN JOINT 25 Line shaft bearing retainer 26 Line shaft bearing 29 Line shaft sleeve Fig FM 4 1 1 cont Section B 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 14 FM Globa
9. These proposals are being offered as alter natives to the accepted practice of storing water or direct pumping to meet sprinkler demands With an approximately 3 failure to start rate for electric motor driven units the reliability for the third zone is reduced from 97 to 91 Almost one in eleven times there is no water available in the third zone The failure to start rate was obtained from 1976 Factory Mutual Research Survey of fire pump reliability Fire protection systems in high rise buildings should be vertically zoned every 275 ft 84 m or so When the public water supply cannot meet the pressure requirements of the sprinkler system in building 275 ft 84 m or less above grade the sprinklers may be supplied by booster pump taking suction from the public main Fig ure FM 2 3 a Sprinklers may also be supplied by gravity tank of sufficient capacity above the roof Fig ure FM 2 3 b The tank filling pump should be capable of refilling the tank within 8 hours Where two water supplies are required either or both may be pump or tank Figure FM 2 3 c Buildings in excess of 275 ft 84 m above grade should be divided into two or more zones of 275 ft 84 m or less Each zone should have its own water supply and independent fire department connections 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 32 FM Global Property Loss Prevention Data Sheets Tank Valve
10. WILL ALLOW THE CRANKING RELAY TO RESET AUTOMATICALLY AND THE SPEED SWITCH WILL FUNCTION CORRECTLY NO ACTION IS REQUIRED ON SPEED SWITCHES THAT ALREADY HAVE THE RESISTOR REMOVED REPLACE THE RUBBER COVER AND CLOSE UP THE INSTRUMENT PANEL DISTRIBUTED TO WORLDWIDE DISTRIBUTORS AND BRANCHES DIVISION AND REGIONAL OFFICES A Fig 2 4 1 3 1 Cummins campaign 8532 description 2002 Factory Mutual Insurance Company All rights reserved 3 N 13 4N Stationary Pumps for Fire Protection Page 48 FM Global Property Loss Prevention Data Sheets 8532 IF THE RESISTOR HAD TO BE REMOVED TEST THE ENGINE TO MAKE SURE IT WILL START AUTOMATICALLY AFTER BEING OPERATED AND SHUT OFF IF THE SWITCH REQUIRED NO REPAIR DO NOT TEST THE ENGINE MATERIAL DISPOSITION SCRAP REIMBURSEMENT WITHIN BASE WARRANTY OR OUT OF THE BASE WARRANTY PERIOD LABOR 0 5 PER ENGINE AT THE APPROVED LABOR RATE PARTS NONE REQUIRED TRAVEL ACCORDING TO NORMAL WARRANTY GUIDELINES CLAIM INSTRUCTIONS PAGE TWO OF THE CLAIM MUST BE COMPLETED A MULTIPLE ENGINE SERIAL NUMBER CLAIM MAY BE SUBMITTED PAY CODE 1 2 3 DIST x AUTHORIZATION 1 2 5 8532 PAY CODE 1 2 3 DLR D SEVERITY CODE 3 2 2 A PAY CODE 1 2 3 INTL FAILURE CODE 3 2 3 WVXOSC ACCOUNT CODE 1 2 4 65 Fig 2 4 1 3 1 Cummins campaign 8523 description cont d 02002 Factory Mutual Insurance Company All rights reserved 3 7N S
11. of the power supply conductors are not large enough to accommodate starting more than one pump simultaneously 7 5 4 Methods of Stopping Stopping should be manual 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 20 FM Global Property Loss Prevention Data Sheets Setting the run period timer to Zero is not an acceptable means of converting from automatic stop to manual stop Approved methods for achieving this conversion are listed in the Factory Mutual Approval Guide for each controller equipped with run period timer Some controllers when arranged for manual stop and with the run period timer set at Zero are subject to cycling under the dictates of the pressure switch Run period timers should be checked regularly to insure they are set at not less than two to three minutes to prevent cycling 7 7 Limited Service Controllers Limited service controllers should not be used with standard fire pumps Limited service controllers do not contain an isolating switch and substitute thermal element type circuit breaker with a relatively low current interrupting rating for magnet trip type circuit breaker In most cases the lack of an isolating switch does not allow the limited service controller to qualify as service entrance equip ment as does the standard motor controller A thermal element type circuit breaker is affected by ambient temperature and as such do
12. 10yeipe1 aui JO eu 2 1801 eq pinoys 18lU asnoy dwnd eus 71 uong vg 001285 HOM 19 Fig 8 2 6 6 Typical radiator cooled engine installation 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 22 FM Global Property Loss Prevention Data Sheets A thermostatically controlled bypass may be used to obtain warm air from the discharge air duct to reduce the pump room heating load during engine operation Air obtained from bypass should be ducted to prevent it from recirculating directly back to the radiator Air Cooled Engines Air cooled engines depend entirely upon ambient air to dissipate combustion heat An engine driven fan is used to insure positive movement of cooling air over the engine Combustion and cool ing air should be obtained from outside the pump room through free swinging louvers having an effective net area of at least two times the area of the outlet from the engine cooling enclosure Cooling air from the engine should be ducted to outside the pump room through free swinging louvers hav ing an effective net area of at least and one half times the area of the engine enclosure outlet cooled engines require approximately the same amount of cooling air as comparably rated radiator cooled engines A thermostatically controlled bypass may be used to obtain warm air from the di
13. REQUIREMENT IN THE UNLIKELY EVENT OF A CHECK VALVE FAILURE HYDRAULIC LOCK OF THE ENGINE MAY OCCUR DURING A SHUTDOWN PERIOD WHICH COULE FREVENT THE ENGINE FROM STARTING AN EMERGENCY SITUATION ACTION A FUEL RETURN LINE FROM THE FUEL PUMP TO THE TOF OF THE FUEL SUPPLY TANK MUST TNSTALLED SEPARATE FROM THE INJECTOR RETURN LINE ENGINE NOT YET INSTALLED WILL ONLY REQUIRE THE FUEL CONNECTIONS ON THE ENGINE TO RE MODIFIED SEE THE ATTACHET FOR INSTRUCTIONS ANI THE ENGINE SERIAL NUMBERS TWO OF THE CLAIM FORM MUST FILLED OUT BEFORE REIMBURSEMENT WILL BE MATERIAL DISPOSITION SCRAF REIMBURSEMENT IN OR QUT OF THE BASE WARRANTY PERIOD LABOR ACTUAL TIME BUT NOT TO EXCEED 2 0 HOURS PARTS DISTRIBUTOR OR DEALER NET FLUS MARK UF ANI WHERE APPLICABLE TRAVEL ACCORDING THE WARRANTY GUIDELINES CLAIM INSTRUCTIONS CODECIa2432 eene X DIST FAY COI ECIS2a232 eese eee DODLRO FAY 1 235 eee INTL ACCOUNT CODE C 2 4 ee 65 amp UIHORIZAlIIQN 1s2 422 48422 SEVERITY CODECGI 2122 eene FAILURE CODE Se 2233256 W F L F S SEND SD s e u uum GED u x c s u qus MEO s s s w Ab DISTRIBUTED TO US AND CAN DISTRIBUTORS ANI BRANCHES INTERNATIONAL DI
14. Tube Elbow Tee Connection Drain Fitting Fig 2 4 1 2 3 Old fuel return arrangement 02002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 44 FM Global Property Loss Prevention Data Sheets 5 Remove the elbow Reference B from the injector return tee connection Reference C and plug the tee connection with a 1 4 NP TF pipe plug Reference H Figure 2 4 1 2 4 6 Remove the drain fitting Reference D from the fuel pump Install drain elbow P N S 1040 A on the fuel pump return tap REFER TO FIGURE 2 4 1 2 4 FOR STEPS 7 and 8 Fuel Fuel Pump Return H Injector Fuel Return Flexible Metal Fuel Connection 3 8 O D Soft Copper Tubing 1 4 Pipe Plug Fig 2 4 1 2 4 New fuel return arrangement 7 Installan agency approved flexible metal fuel line connection on the fuel pump drain elbow Reference 8 Install 3 8 in O D soft copper tubing from this flexible metal fuel connection back to the top of the fuel supply tank Reference G This line must be separate from the injector return line as shown in Figure 2 4 1 2 5 9 If only one fuel return opening is available at the top of the supply tank it is permissible to tee connect the two return lines at the top of the tank as shown in Figure 2 4 1 2 6 Do not connect the two return lines at any other location Make certain that the fuel pump return line is connected below the injector retu
15. and municipalities require a booster pump to reduce water output or shut off when the public water pressure at the pump suction reaches a predetermined residual This is usually between 10 psi 69 kPa 0 69 bar and 20 psi 138 kPa 1 4 bar In these localities care should be taken to esti mate correctly hose stream demands so that the pump output will not be affected due to low suction pres sure and deprive the sprinklers of water Suction pressure regulating valves for booster pumps be necessary to regulate residual pressure to predetermined minimum required by a regulatory authority A pilot controlled valve modulates the pump dis charge flow when the suction pressure varies It reduces the pump discharge flow as the suction pressure approaches the preset minimum so the pump does not cause the suction pressure to go below that for which the pilot control is set Whatever water that is available at or above the pilot control setting is allowed to flow Unapproved pilot controlled valves should be replaced with FM Approved models When pilot controlled valves are installed Fig FM A 2 1 2 1 The suction pressure sensing line should not be less than 12 in 12 7 mm O D drawn temper copper tub ing ASTM Designation B88 or less than 12 in 12 7 mm nominal I D brass pipe ASTM Designation B43 2 The suction pressure sensing line should attach to the side of the pump suction pipe at a distance not exceeding 10 ft 3 m from the
16. common In some cases the reading of the suction gage will indicate whether the trouble is due to a plugged suction If there is more than a slightly noticeable reduction in capacity or the flow will not meet the required demand the cause should be ascertained and the condition remedied without delay Pumps should stop manually Where a fire pump is installed someone adequately instructed in its operation should be present at all times when the pump is running A fire pump is valuable only if put into use at the right time It is important that the essentials of operation be understood by the plant personnel 02002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 30 FM Global Property Loss Prevention Data Sheets Make certain that the plant watch person or other qualified persons are adequately instructed in fire pump operation They may be required to operate the pump when there is no one else at the plant Monthly review of the watchman s ability to operate the pump is recommended Operating instructions should be posted in the pump room These should include manufacturer s operating instructions regarding the controls and pump and indication of what valves should be open They should also include methods of getting assistance in an emergency Where the suction supply is from public service mains the test should not draw the residual pressure at the pump below 20 psi 1
17. exceptions a check valves and backflow preventers are permitted in the suction piping when required by other NFPA standards or by the Authority Having Jurisdiction AHJ and b flow control valves that listed for fire pump service and that are suction pressure sensitive are permitted where the AHJ requires positive pressure to be maintained in the suction piping Regarding item a although nearly unanimous in opinion that check valves and backflow preventers belong on the discharge side of the pump the NFPA 20 committee felt it necessary to recognize the reality that some water departments require backflow preventers on the suction suction side In conjunction with this change a new section 2 21 has been added at the end of Chapter 2 in NFPA 20 outlining correct installa tion on the suction side including a requirement that the backflow preventers or check valves be at least 10 times diameter of pipe upstream from the suction inlet An FM Global comment has been added stating that arrangements are acceptable if flow pressure curve is satisfactory Regarding item b this is consistent with FM Global comments now following A 2 1 2 7 2 13 1 Relief valves are no longer required for adjustable speed drivers with the reason being that there will still be two safety devices overspeed shutdown and engine governor The FM Global commentary for this section has been expanded to address the increasing intentional use of oversized pumps and relief va
18. revised various items in Chapter 11 relating to positive displacement pumps Significant Changes Made in October 1998 Revision Data Sheet 3 7N Centrifugal Fire Pumps was updated to the 1996 edition of NFPA 20 Specific items follow 1 1 6 The term Unit Performance has replaced the term Unit Purchase Text has been changed to clarify that all components do not have to be purchased from a single supplier An FM Global comment has been added to reinforce the existing concept that the pump manufacturer remains ultimately responsible for proper installation and performance 2 2 7 Inthe comment the term Except for installations made prior to 1978 has been deleted In A 2 7 the FM Global comment has been expanded to include criteria for pump rooms located within or attached to the building being protected 3 2 8 4 An FM Global comment has been added referencing Data Sheet 10 3 Hot Work Management 4 2 9 3 Additional information has been added to the FM Global comment A table showing flows at 15 ft sec 4 6 m sec for various pipe sizes has been added Also maximum friction loss guidelines for suction pip ing from a tank has been added to deal with situations of long suction pipes and or multiple elbows and turns 5 2 9 6 c This now allows elbows with plane parallel to pump shaft as long as elbow is 10 times pipe diameter from the flanges of the pump suction intake 6 2 9 9 a NFPA 20 now allows two
19. taking suction from tanks or wet pits such designs should be easily achievable For booster fire pumps taking suction from public water supplies such designs are achievable in most cases by the proper sprinkler system pipe sizing to minimize friction loss and the selection of a pump with a characteristic curve that most closely matches the system design requirements without causing excessive pressure under churn conditions Designs which intentionally incorporate the use of smaller pipe and the use of a relief valve to truncate a portion or the water supply curve downstream from the fire pump should not be used 2 14 Waterflow Test Devices 2 14 1 2 The piping arrangement shown in Figure A 2 14 1 2 b should not be used It does not test the suction water supply 2 19 Pressure Maintenance Jockey or Make up Pumps When two or more fire pumps are installed provide a separate jockey pump for each fire pump with separate feeds and power connections 2 19 5 Where emergency electric power is provided the jockey pump motor should be connected to it 2 21 Backflow Preventers and Check Valves Backflow preventers should be located on the discharge side of the fire pump whenever possible due to the increased friction loss and the potential negative effect on pump performance Additional information is available in Data Sheet 3 3 Cross Connections 3 1 General The fire pump unit consists of the following Furnished by the pump manufacturer or his
20. the battery charger is operating properly Run the engine at rated speed with the pump discharging water for preferably 30 min but not less than 20 min Check and clean the strainer in the cooling water system Test the operation of the speed governor and water relief valve Check and clean the strainer in the cooling water system Test the operation of the speed governor and water relief valve Check the specific gravity of the battery electrolyte at least monthly Check the oil filter annually regardless of engine operation Change any cooling fluids per engine manufacturers guidelines and or inspections If tests show need of repairs or adjustments they should be made as soon as possible following manufacturer s instructions very carefully This should include replacement of belts oil filters etc as recommended STRICTLY ADHERE TO THE ENGINE MANUFACTURERS SPECIFICATIONS FOR ALL FLUIDS AND PARTS USED A stock of spare parts should be kept in the pump room 2 3 Fire Pumps for High Rise Buildings 2 3 1 General Fire pumps may be used for automatic sprinkler systems standpipe and hose systems and combined systems automatic sprinkler systems having standpipe type hose outlets for fire department use For guide lines for each of these systems refer to Data Sheet 2 8N nstallation of Sprinkler Systems and Data Sheet 4 4N Standpipe and Hose Systems Compliance with all other chapters of this standard except as otherwise specified
21. 00 3412 PL2414 PL6831 PL6830 PL2415 PL6833 PL6832 100 379 Clark GM Diesel DDFP 03AN 1470 14 5 55 All others 22 5 85 DDFP 04AN 2300 20 5 78 All others 19 72 1470 17 5 66 1750 50 189 All others 55 208 DDFP 04AT DDFP 06AT 2100 53 201 others 62 235 CummisEngmeCo ooo vano OO O Alohermodes _ o omanDieselsLt 8J and 8JT 200 9807 __ 2100 10280 ___ 22 14599 _____ Flowmetricoltd O A 469 GEC Diesels Inc formerly Ruston _ AD 0 13 9 1068 ____ 777777 40 2 4 O O A 2 0 LET A 2M _ Ah j 83212 deer Cummins H ooo V 1710 F VT 1710 F and VTA 1710 F AH 65 246 ohermodes AN 3242099 Lindenburg Aggregate Gmbh O Mag 31480 j 709 Map _ 889 9500 oM403 1500 2580 omas OoOO 180 AQ 05 JL0 2300 ____ 1890 1566 Maa _ 02002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 28 FM Global Property Loss Prevention Data Sheets Engine Make Minimum Acceptable Heat and Exchanger Flow Rate Model Number gal min dm min Mortoren Werke D232 V8 D232 v8 D232 V12 Stewart amp Stevenson Se
22. 2 Factory Mutual Insurance Company All rights reserved 3 7 Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 37 3133 EAST KEMPER ROAD 1340 TERMINAL ROAD 2610 INDEPENDENCE DRIVE 2697 GRASSLAND DRIVE CINCINNATI OH 45241 INDIANAPOLIS IN 46217 FORT WAYNE IN 46808 LOUISVILLE KY 40299 e 513 771 2200 317 783 6651 219 482 9185 502 491 2021 ur G M DIESEL May 12 1989 Armand Brando Factory Mutual Research 1151 Boston Providence Highway P O Box 9102 Norwood MA 02062 Subj Mandatory Governor Spring Replacement Diesel Fire Pump Driver Reference Clarke Models MD 3 MD 4 MD 6 and MD 6T Production Dates April 86 thru Dec 88 Sir Madam The referenced Clarke models produced during the dates shown might contain a manufacturing defect That defect could cause the spring to break that occurs the failsafe design of the Clarke system would permit the engine to start and run by command from the CONTROLLER However upon signal to STOP the unit would continue running Since the STOP signal also effects the closing of the raw water solenoid valve the unit would fail due to overheating At this point major expense and considerable lost time is involved to repair the engine The facility could be without this safety protection during that service interval A campaign has been initiated to replace the spring on all units referenced above Letters will be sent to all known owners an
23. 38 kPa 1 38 bar Inspection and Test To make sure that the pump installation is always ready for service the pump should be started weekly and run at full soeed discharging through a convenient outlet Electric motor driven pumps should run for a minimum of 10 minutes diesel engine driven pumps should be run for a minimum of 30 minutes Automatic starting should be tested by dropping system pressure or where flow is controlled by drawing water from the yard or sprinkler system At each test checks should be made of the operation of the priming devices the temperature and tight ness of the glands the readings of the suction and discharge gages and the condition of the suction supply Check actual start and stop pressures against pressure switch settings every time the fire pump unit is started With electric motor drive operation of the starting devices should be checked With steam turbine drive make sure that the steam trap for removing condensed steam at the throttle is working properly observe the steam pressure with the pump delivering water and the test the operation of the speed and pressure governors the overspeed trip and the steam and water relief valves With internal combustion engine drive make sure that the engine is clean and dry Check the fuel tank and keep it at least three fourths full Check the quality and quantity of the crankcase oil and change when it has become fouled or has lost viscosity Make sure that
24. 80 psi 552 kPa 5 5 bar at the turbine throttle when exhausting against atmospheric back pressure with the hand controlled auxiliary nozzles open When normal operating boiler pressure is above 120 psi 827 kPa 8 3 bar the turbine should be capable of driving the pump at its rated speed and maximum pump load with steam pressure at the turbine as low as 70 of this normal pressure when exhausting against atmospheric back pressure and with the hand controlled auxiliary nozzles open 10 1 3 Steam Supply Requirements The steam supply should be sufficient to satisfy the maximum requirements given in the following table which is based on an assumed 120 psi 827 kPa 8 3 bar steam pressure at the throttle with atmospheric exhaust 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 24 FM Global Property Loss Prevention Data Sheets when running at rated speed and load and with the hand controlled auxiliary nozzles closed For intermediate speeds not given in the table the maximum steam consumption may be interpolated Steam Consumption Steam consumption should not ordinarily exceed the values given in the table Maxi mum steam consumption rates are recommended in order to obtain turbines of good design that will not be likely to overtax the available steam supply 10 2 Automatic steam turbine drive should not be used on new installations as there are no FM Approved driv
25. D THE PROBLEM IS A RESISTOR THAT DOES NOT ALLOW THE CRANKING RELAY TO AUTOMATICALLY RESET AFTER THE ENGINE HAS BEEN STARTED AND SHUT OFF THIS WILL PREVENT AUTOMATIC RESTART OF THE ENGINE UNLESS THE SPEED SWITCH IS MANUALLY RESET ACTION SUSPECT ENGINES FOR SPEED SWITCH INSPECTION ENGINE SOLD TO ENGINE SOLD TO SERIAL NO DISTRIBUTOR SERIAL NO DISTRIBUTOR 11236335 INDIANAPOLIS 18108441 SINGAPORE 11267439 INDIANAPOLIS 18108442 SINGAPORE 18108716 INDIANAPOLIS 18109609 SINGAPORE 18109543 INDIANAPOLIS 18109610 SINGAPORE 18109550 INDIANAPOLIS 18109605 ARLINGTON 18109704 INDIANAPOLIS 18109859 ARLINGION 18109719 INDIANAPOLIS 11242627 WELLINBOROUGH ENGLAND 18109827 INDIANAPOLIS 11246754 WELLINBOROUGH ENGLAND 18109709 ATLANTA 1123268C DAVENTRY ENGLAND 18109718 ATLANTA 15109593 COLUMBUS OH 18109822 ATLANTA 18109838 COLUMBUS OH 18109823 ATLANTA 18109544 QUEBEC 18109824 ATLANTA 11257647 LOUISVILLE KY LOCATE THE SUSPECT ENGINES SEE ABOVE AND INSPECT THE SPEED SWITCH TO DETERMINE IF THE CRANK RELAY RESISTOR BETWEEN TERMINALS El AND E2 HAS BEEN REMOVED INSPECT AND REPAIR THE SWITCH IF REQUIRED AS FOLLOWS THE SPEED SWITCH IS LOCATED INSIDE THE ENGINE INSTRUMENT PANEL TO INSPECT THE SWITCH REMOVE THE RUBBER COVER FROM THE FRONT CASE OF THE SPEED SWITCH EXPOSING THE OVERSPEED AND CRANK TERMINATION ADJUSTMENT SCREWS IN THIS AREA YOU WILL SEE TERMINALS MARKED EI AND E2 REMOVE THE 110 K RESISTOR BETWEEN TERMINALS El AND E2 IF THERE IS ONE THIS
26. Edmonton 18109941 Arlington TX 11312961 Portugal 18109942 Kansas City 11312962 San Francisco 18109943 Atlanta GA 11312963 CIC 18109946 Indianapolis 11316470 Dedham 18109947 11316471 18109948 11308158 Atlanta 18109949 Quebec 11308159 Venezuela 18109950 Columbus OH 11308160 Atlanta GA 18109955 Venezuela 11308161 11321398 11308162 Indianapolis Fig 2 4 1 3 2 Cummins campaign 8532 listing 2002 Factory Mutual Insurance Company All rights reserved 3 N 13 4N Page 50 11327890 11327891 18109694 18109795 18109829 18109837 18109860 18109861 18109862 18109863 18109956 18109957 18109958 18109860 Stationary Pumps for Fire Protection FM Global Property Loss Prevention Data Sheets 11315521 11315522 7 11315523 Daventry 11315524 Indianapolis 11321394 11321395 Arlington 11321396 11321397 11312960 11312961 11316470 7 18109796 S 11315525 Arlington TX 11321396 MATERIAL DISPOSITION Scrap ep a xs s ss s s s ge eg s ges s s me LABOR 0 5 hour per engine at the approved labor rate PARTS None TRAVEL According to normal warranty guidelines CLAIM INSTRUCTIONS INE s s e s cd ge Page two of the claim must be completed mulitple engine serial number claim may be submitted PAY PAY PAY PAY CODE CODE CODE CODE
27. ION All Cummins Model V 378 or V 504 engines having a serial number lower than 220235057 must have fuel pip ing systems installed or modified in accordance with Cummins Campaign No 8422 No other method should be accepted If you have an engine as described above that has not had the return fuel plumbing modified contact your local Cummins Engine Co distributor DISCUSSION An engine with a serial number lower than 20235057 is subject to hydraulic lock in the event of a check valve leak or failure during a shutdown period hydraulic lock fuel draining into a cylinder can prevent the engine from starting The expiration date of Cummins Campaign No 8422 was extended in 1986 in an added effort to locate all Model V 378 and V 504 engines with a serial number lower than 20235057 driving fire pumps The Cummins distributor should refer to Campaign 8422 8422A 8422B and 8422C It is possible that some V 378 and V 504 engines that were not shipped as fire pump drivers have been converted in the field without Cummins knowledge The following information in Figures 2 4 1 2 1 through 2 4 1 2 6 represents Cummins Campaign No 8422 literature 2002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4 FM Global Property Loss Prevention Data Sheets Page 41 Cummins Engine Company Inc Box 3005 Columbus Indiana 47202 3005 Mr Thomas 9 Brown FACTORY MUTUAL RESEARCH CORPORAT
28. ION 1151 Boston Providence Turnpike Norwood MA 02062 paw Mr Brown Subject Separate Fuel Line to Fuel Source on V 378 and V 504 Fire Pump Engines Campaign 8422 This is in response to our phone conversation the above subject We have no objection to Factory Mutual publishing Campaign Letter 8422 and all the attachments to send to anyone they deemed necessary to aid in carrying out the completion of this campaign We appreciate your assistance in this matter Very truly yours RMHoover djm Certification Engineer cc A Brandao FM Fig 2 4 1 2 1 Cummins letter 2002 Factory Mutual Insurance Company All rights reserved 3 N 13 4N Stationary Pumps for Fire Protection Page 42 FM Global Property Loss Prevention Data Sheets CUMMINS ENGINE COMPANY M C80312 8422 3005 WORLDWIDE CLMS MGT COLUMBUS IN 47202 3005 x AUGUST 21 1984 s STE s s v u OS sma x v s s us SENDS v n n s SS SUBJECT V 378 AND U 504 FIRE PUMP RETURN PLUMBING CAMPAIGN NO EXPIRATION DATE CONTACT 8422 AUGUST 31 1985 US CAN CAROLYN HIOTT 812 377 8152 NOVEMBER 30 1985 INTL A SO SE EE SS LS su u m i s B DESCRIPTION ALL FIRE ENGINES HAVE OVERHEAD FUEL TANKS BY AGENCY
29. Insurance Company All rights reserved 3 7 Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 23 Warning signals are provided to indicate failure to start overheated engine 190 F 88 C or over low oil pres sure and overspeed of diesel engines If overheating or low oil pressure occurs the engine will continue to run until failure If rated engine speed is exceeded by approximately 20 the diesel engines stop Contacts are provided to which pump running alarm circuits should be connected 9 4 2 Alarm and Signal Devices Remote from the Controller Power failure relays are not generally required on FM Global installations except as recommended in the FM Global comment for NFPA 20 Section 8 6 5 to maintain operation in cold temperatures during power failures 9 5 2 Automatic Operation of the Controller See FM Global comments for NFPA 20 Section 7 5 2 for starting and stopping recommendations 9 5 2 4 Sequence Starting of Pumps Sequential starting of engines is not recommended due to different length of time that engines crank 9 5 2 7 Weekly Program Timer Appropriate personnel should be in attendance for weekly pump running tests to monitor proper operation of the pump unit during the test and to ensure that the unit is left in proper operating condition This can best be done in conjunction with the weekly tests and inspections recommended in Chapter 11 9 5 5 Methods of Stopping Stop
30. STRIBUTORS AND BRANCHES HIVISIONAL OFFICES INTERNATIONAL REGIONAL DFFICES Fig 2 4 1 2 2 Cummins campaign 8422 description 2002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4 FM Global Property Loss Prevention Data Sheets Page 43 Attachment Campaign 8422 NOTE Prior to going to the job site contact the appropriate personnel to determine the approximate distance between the engine fuel supply tank Also determine the available fuel return openings the top of the fuel tank and pipe fitting sizes that may be required The following parts will be necessary 1 inch O D soft copper tubing length determined by individual installation 2 1 inch diameter by 18 inch length flexible metal fuel line connection 3 1 inch NPTF pipe plug 4 1 S 1040 A adapter elbow 5 Pipe connections to secure flexible metal connection and copper tubing between the fuel pump drain elbow 98 18 male thread and the top of the fuel tank 6 Pipe thread sealant CAMPAIGN INSTRUCTIONS 1 Contact operating personnel responsible for the fire protection system before starting work Obtain approval to perform the fuel plumbing modification 2 Disengage the automatic start switch on the controller 3 Shut off the fuel supply line to the engine fuel pump REFER TO FIGURE 2 4 1 2 3 FOR THE FOLLOWING STEPS D Pump A Fuel Return C D Fuel
31. a 7 Fig FM A 2 1 2 Arrangement for pilot controlled hydraulically actuated minimum suction pressure Uqi Sl uuu uuu u 8 Fig FM 4 1 1 Water lubricated vertical shaft turbine type pump 12 Fig FM 4 1 1 cont Section 13 rog Seso NCC 1 3 Fig FM A 4 2 2 2 a Vertical shaft turbine type fire pump installation with section from wet pit 14 Fig FM A 4 2 2 2 b SUMP dimensions plan view 14 Fig FM 4 2 2 2 Sump dimensions elevation view 22 15 Fig FM A 7 5 2 1 Acceptable piping connection for automatic fire pump control by system pressure 18 Fig FM 8 2 6 6 Typical radiator cooled engine installation 2 21 Fig FM A 11 2 6 2 Effect of variations in speed on pump performance curve 25 Fig FM 11 4 Rating chart for centrifugal fire pumps 2 29 Fig FM 2 3 a Single zone pumped system 2 31 Fig FM 2 3 b Single zone gravity system 2 32 Fig 2 3 Single zone system two supplies 2 32 LU 33 By Ga
32. ackets connected into the circulating cool ing system or into the raw water discharge line from the heat exchanger Oil coolers intake manifolds and other parts may also be equipped with water jackets supplied from the cooling system as recommended by the engine manufacturer Engines require a flow of 15 to 65 56 8 to 264 dm m or more of raw water through the heat exchanger for adequate cooling The raw water outlet should discharge freely to atmosphere in a location visible to the operator usually the waste cone of the pump relief valve 8 2 6 6 Radiators Radiator Cooled Engines Coolant in radiator cooled engines is circulated through the engine block and the radiator by an engine driven pump Only clean or treated coolant complying with the engine manufactur er s recommendation should be used in the circulating system The coolant temperature is regulated by ther mostat in the coolant system Combustion and cooling air should be obtained from outside the pump room through free swinging louvers having an effective net area of at least two times the area of the radiator air outlet A pusher type engine driven fan draws ambient cooling air over the pump and engine and forces it through the radiator Cooling air from the radiator should be ducted to outside the pump room through free swinging louvers hav ing an effective net area of at least one and one half times the area of the radiator air outlet See Figure FM 8 2 6 6 R
33. acturer or his authorized representative Controller Vertical shaft turbine type pump Column Pipe Line shaft Driver and accessories 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 16 FM Global Property Loss Prevention Data Sheets 6 Surface of underground discharge head 7 Flow meter or hose header and hose valves 8 Suction strainer 9 Automatic air release valve and fittings 10 Quality discharge pressure gauge 11 Pressure relief valve and waste cone when required 12 Water level indicator when required 13 Pressure recorder 14 Flexible connections for engine cooling water and fuel lines 15 Spare parts 16 Instruction and maintenance manual in local language Furnished by the purchaser depending upon suction supply and type of driver Discharge valve Hose connection valve Discharge check valve All piping connections and fittings Suction screen to suit requirements Wiring and power connection for electric motor Pipe connections to steam turbine 8 Cooling water overflow connection for internal combustion engines 4 3 5 Fittings NOOR WD Discharge Pipe The size and type of the discharge pipe and its check valve and FM Approved indicating valve should be as detailed in Section 2 10 of NFPA 20 Pressure Gage The pressure gage should be connected near the discharge tee or elbow 4 5 1 2 Nonreve
34. adiator cooled engines require much more cooling air than comparably rated heat exchanger cooled engines 02002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4 Stationary Pumps for Fire Protection FM Global Property Loss Prevention Data Sheets Page 21 sj xno1 you eu Bua asnon dwund mous put urea OPISING 0 esnou dund eur u eq pino us 78 0179 apno 10 ou jo ease pesn eq pinous JO 10138 82811 V 8 jo BU SOUIN 1529 1e oq PINOYS eut e UOn PJOSI 20 1 10 duind y wos 6 0 398 1noqe TING eq pmoys Bumgag1gd sun auiBuo su Spur Buipeasid os sq p wipes pue Bunanp 1 pasn s j 20 1095 oq unang ECH 10 woos yBnoue ing Buronp Asesseceu 01 esnou duund 0 ay 63 E 38 1 n0 asnou ysnd moys oy Z
35. aign 8532 descripto Rc 47 Cummins campaign 8523 description 48 Cuminina campaign 0532 Rc 49 Cummins campaign 8532 listing cont d 50 Cummins campaign 9209 details 2 52 Cummins campaign 9209 details cont d 53 List of Tables Table FM 2 9 3 Flow Required to Create 15 ft sec 4 6 m sec Velocity 9 2002 Factory Mutual Insurance Company All rights reserved 3 N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 3 1 0 SCOPE 1 1 General This document provides guidelines for stationary pumps for fire protection FM Global has adopted NFPA 20 Stationary Pumps for Protection 1999 edition subject to interpretations and or comments as out lined in section 2 0 Loss Prevention Recommendations Included in section 2 0 are guidelines for fire pumps for high rise buildings and a listing of FM Global equipment alerts 1 2 Changes from Previous Edition Significant Changes Made in September 2001 Revision 1 The document has been reformatted to recognize NFPA 20 1999 edition with FM Global interpreta tions and or comments referenced to that standard NFPA 20 is no longer reprinted within this standard Signific
36. ant Changes Made in January 2001 Revision Data Sheet 3 7N Stationary Pumps for Fire Pumps was updated to adopt the 1999 edition of NFPA 20 Specific items follow 1 NFPA has changed the title to Stationary Pumps for Fire Protection since a new Chapter 5 has been added to cover positive displacement pumps for foam and water mist systems 2 NFPA has added new definition in 1 8 relating to items covered in the new Chapter 5 3 NFPA has added a new section 2 2 4 and associated Appendix item to discourage the use of pressure relief valves as part of system hydraulic design An associated change has also been made as noted in Item 9 below 4 NFPA has added a new second sentence to 2 6 1 to clarify the location of the circulation relief valve 5 NFPA has added new sections 2 7 1 1 and 2 7 1 2 to clarify separation requirements for fire pump units 6 NFPA has revised the second sentence of 2 9 3 to indicate that the water flow velocity limit applies only to that portion of pipe within 10 pipe diameters or the pump suction flange 7 Anew FM Global comment has been added after 2 9 6 3 discussing reasons from proper arrangement of elbows near the pump suction flange 8 NFPA has revised 2 10 4 to clarify that a backflow preventer is acceptable in place of a check valve in the pump discharge assembly 9 NFPA has revised 2 13 1 and A 2 13 1 The FM Global comments for this section have been revised accordingly and now include gu
37. authorized representative Controller Horizontal split case pump Driver and accessories Flow meter or hose header and hose valves Quality suction and discharge gages and connections Pressure relief valve and waste cone when required Automatic air release Eccentric reducer Increaser Ball drip when required Circulation relief valve when required Substantial bedplate for pump and driver Pressure recorder Flexible connections for engine cooling water and fuel lines Spare parts Instruction and maintenance manual in local language O gt G N L4 zech 2002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 11 Furnished by the purchaser depending upon suction supply and type of driver Suction OS amp Y valve Discharge valve Hose connection valve Discharge check valve All piping connections Suction screen to suit requirements Wiring and power connection for electric motor Pipe connections to steam turbine Cooling water overflow connection for internal combustion engines 10 Discharge elbow or tee 11 Reducing tees or elbows O S 3 2 Factory and Field Performance Limited Service Fire Pumps furnish not less than 130 of rated capacity at not less than 65 of rated head They are limited to maximum of 30 hp acr
38. aximum and levels off or drops There should not be more than 10 differences in current between phases 11 2 7 3 If the power failure relay is not needed in accordance with the FM Global Comment for NFPA 20 Section 8 6 5 it should be removed 11 4 Periodic Inspection Testing and Maintenance 02002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 25 RATED RATED CAPACITY PRESSURE SHUTOFF 150 RATED CAPACITY 65 RATED PRESSURE HEAD A v Q i uJ tx 2 ut e lt hal c gt 2 DISCHARGE GPM A Typical manufacturer s shop test curve with pump operating at rated speed m Field test curve produced by extreme variations In speed such as could occur with steam turbine internal combustion engine drive Could be caused by insufficient power from steam turbine or faulty operation of internal combustion engine governor Fig FM A 11 2 6 2 Effect of variations in soeed on pump performance curve Piping with a hose header and a sufficient number of valves or piping with an FM Approved flow meter dis charging to drain or to an impounded water supply are preferred This allows check of the water supply from its source to the pump discharge Connecting the pump discharge through an FM Approved meter back to the pump suction is not recom mended because of the possibilit
39. be routed over or through either a combustible building or any building with combustible occupancy Nonarmored cables designed for direct burial in the earth are acceptable without being installed in conduit if buried at least 24 in 0 6 m deep This depth may be reduced to 18 in 0 5 m or less provided supple mental protective covering such as 2 in 51 mm concrete pad metal raceway pipe or other suitable pro tection is used Armored cables do not ordinarily require additional protection against mechanical injury See NFPA 70 1996 National Electric Code section 300 5 02002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 17 6 3 1 Circuit Conductors NFPA 70 Article 430 Part B Motor Control Circuits requires conductor sizing to be rated for at least 125 of motor full load current rating Larger sizes are not needed unless required to meet provisions of NFPA 20 section 6 3 4 Any NFPA 20 Chapter 7 requirements for rating of controller components should not be inter preted to require a similar rating for conductors 6 3 2 Power Supply Arrangement The intended performance guidelines to ensure a reliable electrical feed are that the electrical feeds should 1 not be exposed to direct damage from fire explosions or from any equipment or other processes that are part of the plant s normal operations including any exposure
40. booster fire pump inlet flange A union with 3 32 in 2 3 mm orifice should be installed in the suction pressure sensing line between the strainer and drain tee 02002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 7 3 brass body strainer with sediment blowoff should be installed in the suction pressure sensing line The Strainer should prevent the passage of foreign particles larger than 0 020 in 0 5 mm 4 the suction pressure sensing line contains a shutoff valve it should an FM Approved indicating type having bronze or brass body with brass bronze or stainless steel trim The shutoff valve should be pad locked or lock wired and sealed in the open position The 72 in 12 7 mm drain valve should be pad locked or lock wired and sealed in the closed position 5 They should be operated at least monthly by discharging water through a 2 in 50 mm or larger outlet The valve position indicator should be observed for proper valve operation 6 To test the pilot controlled valve 5 flow water from a 2 in 50 mm or larger outlet preferably located within the pump house With water flowing open the 12 in 12 7 mm drain valve 10 until pressure drops in the suc tion pressure sensing line 7 below the pilot control pressure setting The pilot controlled valve 5 should begin to close as soon as the pressure in the suct
41. d Original Equipment Manufacturers A copy of the letter and instructions to be sent are enclosed for your review Included in that mailing will be replacement spring Because Clarke does not know all of the unit locations I ask that your company assist Clarke in the identification process Please have your field representatives contact Paul Canter at A C 513 771 2200 X339 or FAX the information to his attention at A C 513 771 0520 Clarke will accept collect calls regarding this issue if the caller identifies the call as relating to the MD Fire Pump Campaign I thank you for your support and assistance regarding this matter Very truly yours pz eee ft FEE John Whitney Engineering Manager J 8f Enclosure Fig 2 4 1 1 2 Clarke notification to Factory Mutual Research 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 AN Page 38 STEP STEP STEP stroit Diesel Rilisan Stationary Pumps for Fire Protection FM Global Property Loss Prevention Data Sheets CLARKE E Diesel Engines G DIES E L Cincinnati Ft Wayne IN indianapolis iN Louisville KY 513 771 2200 219 482 9185 317 783 6651 502 491 2021 INSTRUCTIONS REPLACEMENT OF THE ORIGINAL GOVERNOR RETURN SPRING To verify the unit serial number locate the cerification plate at the right rear of the engine mounted on the flywheel housing See photo A on back
42. dards There may be a number of references to other NFPA or other non FM Global standards In many instances FM Global has a corresponding Data Sheet FM Global Data Sheets will generally take precedence unless those other standards have also been adopted by FM Global either with or without interpretations 2 1 4 Listed or FM Approved Within the NFPA Standard Listed means equipment Approved by Factory Mutual Research and listed in the Factory Mutual Research Approval Guide Within other standards similar terminology usually refers to a recognized testing laboratory Within the NFPA Standard Approved means acceptable to the authority having jurisdiction FM Approved equipment should be used whenever possible 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4 Stationary Pumps for Fire Protection Page 6 FM Global Property Loss Prevention Data Sheets 2 2 Comments and Exceptions to NFPA 20 2 2 1 NFPA 20 Stationary Fire Pumps for Fire Protection 1999 edition The NFPA 20 1999 edition is adopted by FM Global Section references to NFPA 20 are provided followed by the FM Global interpretations and or comments for that referenced section FM Global interpretations and or comments are provided for the following sections of NFPA 20 1999 edition as NER A28 24442 4222 75 832 oss O a 219 43 782 845 967 28 2198 438 7521 853 960 4542
43. e public water supply The second fire pump serving the high level zone is located at the 275 ft 84 m level and obtains water from a tank at the same level The tank is filled from either the low level zone fire pump or a separate tank filling pump Buildings having three or more zones of 275 ft 84 m each should duplicate the high zone arrangement from Figure FM 2 3 d or Figure FM 2 3 e for the third and higher zones Pump suction tanks should be able to supply the required demand for the expected duration without makeup Gravity tanks should at a minimum be able to supply the sprinkler demands for the expected duration 2 3 3 Driver Diesel engines or electric motors are acceptable for driving fire pumps in high rise buildings 2 3 4 Power Supply Power for driving fire pumps high rise buildings shall be selected on the basis of adequacy reliability and safety Where electric motors are used and the height of the structure is beyond the pumping capability of the fire department apparatus a reliable emergency source of power shall be provided for the fire pump installation 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 34 FM Global Property Loss Prevention Data Sheets if Needed Tonk Valie Normoliy Closed Vaive Normally Open High Z High Zone Five Suction Tank 550 168 Volve Normally Closed Volve Nor
44. ed by the Hydraulics Institutes Standards for intake design using sump wet pit Variables are as follows o this is the minimum width of the wet pit B this is the suggested maximum dimension of the pump centerline from the back wall The edge of the bell should be close to the back wall C should be specified by the pump manufacturer H this is minimum value based on minimum water level Submergence for determining the location of the second impeller from the bottom of the pump bowl assemble is H minus C Y this is minimum recommended distance of the pump centerline to the screen Based on expected maximum pump flow recommended values are as follows Pump flow Y gpm n n in l min mm mm mm Up to 3000 11 400 34 864 13 330 60 1524 4000 40 1016 16 406 70 1778 5000 44 1118 18 457 75 1905 Note that other values may be used when recommended by the pump manufacturer or when alternate designed are certified as being in accordance with the design principles in the Hydraulic Institute Standards When determining dimension S in order to not exceed 1 ft sec 0 3 m sec velocity in the wet pit dimen sion H will be fixed and S should be either the minimum indicated above or larger if needed to not exceed the velocity limits Use the minimum low water level in the pit for this determination 4 3 Pump Fire Pump Unit The fire pump unit consists of the following Furnished by the pump manuf
45. ells and long pump shafts usually increase significantly the total cost of the installation Under these condi tions it may be more economical and reliable to provide aboveground storage tanks or reservoirs from which horizontal fire pumps could take suction Deep well pumps of relatively low head and small capacity could be used for filling 4 2 1 Source Multiple pumps installed to meet the water demand should be far enough apart so that the water supply is adequate for all pumps to be supplied at 150 of rated capacity simultaneously The adequacy and dependability of the source of water are of primary importance and must be fully deter mined prior to the installation of the fire pump Stored water supplies from lakes streams or open or closed reservoirs supplying wet pits are preferable Groundwater supply from single well supplying fire service only is not acceptable Groundwater supply taken from thoroughly tested wells is acceptable for fire service when each of two wells alternately supplies the factory use and fire pump water demand simultaneously Each of the two wells should be equipped with an FM Approved vertical shaft turbine type pump having a flow and pressure character istic suitable to meet factory use or fire service demand whichever is higher The combined capacities of the two pumps should be sufficient to supply factory use and fire service demands simultaneously 4 2 2 2 Wet Pit Installations See Figures FM A 4 2 2 2 a
46. endicular to the plane of the pump shaft a location 10 pipe diameters from the suction inlet is considered an acceptable distance to even out flow 2 9 9 Devices in Suction Piping Backflow preventers should be located on the discharge side of the fire pump whenever possible due to the increased friction loss and the potential negative effect on pump performance 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 10 FM Global Property Loss Prevention Data Sheets 2 13 1 Relief Valve Pressure Relief Valves for Adjustable Speed Drivers Note that for the NFPA 20 1996 edition the requirement for a relief valve on pumps connected to adjustable speed drivers was deleted on the basis of excellent field experience afforded by engine governors in com bination with the overspeed shutdown feature included on FM Approved diesel engines Engines which are not equipped with overspeed shutdown should be provided with a pressure relief valve Pressure Relief Valves for Systems with Excess Pressure The use of pressure relief valves should be avoided whenever possible by using proper system design techniques to ensure that the system will not experience excess pressure Generally good design should dictate that the pump shutoff churn pressure plus static suction pressure not exceed the maximum pressure rating for system components which is usually 175 psi 11 9 bar For fire pumps
47. ers or controls 11 2 Field Acceptance Tests An FM Global representative should witness field tests before final acceptance of a pump installation Suffi cient time should be provided between notification and the test so that necessary information can be pro vided to the FM Global representative 11 2 6 2 1 The reduced capacity should at least exceed the fire protection system water demand A flow meter should not be installed in a closed loop With closed loop if the suction supply valve were to be nearly shut the near closure would not be detected The flow meter should be tested for accuracy before the pump acceptance test to ensure that it is installed correctly Pump Performance Curves In conducting a field acceptance test the number and or size of hose nozzles or the flow meter control valve should be varied Thus sufficient measurements will be obtained to plot at least five well spaced points in order to check the net head characteristic curve of the pump In field tests actual speeds may vary from the rated speeds Pumps operated at a constant speed less than rated speed would produce curves parallel to but below the one for rated speed Curve B in Figure FM A 11 2 6 2 is one pro duced by extreme variations from the rated pump speed These conditions are unacceptable and should be corrected If pump speed varies at some points the flows and pressures may be corrected to what they would have been at normal speed provided the pum
48. es not have a uniform current carrying characteristic 8 2 6 4 Heat Exchanger Water Supply Bypass The maximum pressure allowable on the cooling line should be indicated on the pressure gauge When the pressure regulator is bypassed the pressure should not exceed the maximum allowable pressure Heat exchanger cooled engines are equipped with an engine driven pump which circulates coolant around the heat exchanger tubes and through the engine block Only clean or treated coolant complying with the engine manufacturer s recommendation should be used in the circulating system The coolant temperature is regulated by thermostat in the circulating system Raw water for the heat exchanger is piped from the fire pump through connection between the pump out let and the discharge valve The raw water line is equipped with strainer control valves bypass and gage con nection When the heat exchanger tubes are not designed to withstand 300 psi 2067 kPa 20 7 bars regulator is provided in the raw water line When the pump is arranged for automatic starting the raw water line is equipped with a normally closed solenoid valve that opens only when the engine is running oth erwise water from the suction tank or reservoir could be wasted through the pump and engine cooling system A solenoid valve is not required when the pump is vertical shaft turbine type installed in a well or wet pit Engine exhaust manifolds which are cooled with water have water j
49. esults from the spring breaking Clarke has asked for assistance in locating the suspect engines The bottom line the identification plate contains the month and year of manufacture If the governor spring breaks the fail safe design of the Clarke System permits the engine to start and run by command from the controller If the spring breaks the STOP signal would be ignored but the raw water solenoid would close causing the engine to overheat and fail Additional information and instructions from the manufacturer follow in Figures 2 4 1 1 1 through 2 4 1 1 6 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 AN Stationary Pumps for Fire Protection Page 36 FM Global Property Loss Prevention Data Sheets 3133 EAST KEMPER ROAD 1340 TERMINAL ROAD 2610 INDEPENDENCE DRIVE 2697 GRASSLAND DRIVE 45241 INDIANAPOLIS 46217 FORT WAYNE 46808 LOUISVILLE 40299 513 771 2200 317 783 6651 219 482 9185 502 491 2021 CLARKE IE S EL May 11 1989 Name Address City State Zip Subj Mandatory Governor Spring Replacement Diesel Fire Pump Driver Reference Model S N Sir Madam The referenced unit has been identified as being under your care and custody It has come to our attention that the engine governor spring on your unit might contain a manufacturing defect which could cause the spring to break If that occurs the failsafe design of the Clar
50. herein should be followed 02002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 31 Requirements for sprinkler systems sometimes necessitate complete separation from the standpipe sys tem Common protection may be possible provided that requirements for both sprinkler and standpipe pro tection are met in accordance with Data Sheet 2 8N nstallation of Sprinkler Systems and Data Sheet 4 4N Standpipe and Hose Systems 2 3 2 Pump Arrangement Vertical series staging of fire pumps should not be accepted for direct pumping to sprinkler systems because of both reliability concerns and the fact that there are no FM Approved controllers for series staging of fire pumps 275 84m Mox Grade Supply Connection Fire Pump Fig FM 2 3 a Single zone pumped system In series staging the first lowest pump discharges to the first zone sprinklers and the suction of the sec ond pump the second pump discharges to the second zone sprinklers and the suction of the third pump etc If fire occurred near the top of building having three vertical zones it would be necessary for the first pump to start then the second then the third Any one of the three pumps failing to start would prevent water from being supplied to the upper floor sprinklers Proposals for vertical series staging of fire pumps are increasing
51. ication is needed and has not been made the engine should be repaired without delay by a local Cummins distributor under Campaign No 8532 DISCUSSION A limited number of NT fire pump drive engines have been shipped to the field with a possible defective speed switch A list of NT fire pump drive engines that may have a defective United Technologies Model SWA 675 speed switch is attached The problem is a resistor that does not allow the cranking relay to automatically reset after the engine has been started and shut off This will prevent automatic restart of the engine unless the speed switch is manu ally reset after shutoff Cummins policy is that the distributor is responsible for notifying the Original Equipment Manufacturer OEM and or the end user of this campaign In some instances engines are sold to a distributor but shipped from the factory to designations other than the distributor location shown on the lists A check of the serial number of Models 85 NT855F4 NTA855F NTTA855F engines against the list included here is necessary Note The following information in Figures 2 4 1 3 1 and 2 4 1 3 2 represents Cummins Campaign No 8532 literature 2 4 1 4 Cummins Engine Company Model NT Fire Pump Engines Field Campaign 8815 RECOMMENDATION When a Cummins Engine Company Inc Model NT fire pump engine is located check the serial number with the local Cummins distributor to determine if Field Campaign 8815 applie
52. idance for booster pumps where static pressures may vary 10 NFPA has revised 2 14 1 1 to clarify performance objectives 11 NFPA has revised 2 21 3 Also an FM Global comment has been added discussing the reason for the proper location of devices in the suction line 12 NFPA has revised 3 1 1 and 3 2 and has included new figures and a chart showing the various types of pumps to assist in proper understanding of the different types of pumps 13 has revised 3 3 4 Also an FM Global comment has been added after 3 3 4 discussing the reason for the proper location of devices in the suction line 14 NFPA has revised 3 5 1 and 3 5 2 to differentiate separately coupled type pumps from those that are not separately coupled 15 NFPA has added a new chapter 5 Positive Displacement Pumps which are used for foam and water mist systems FM Global guidance for High Rise Buildings has been relocated at the end of Chapter 4 16 NFPA 20 reorganized Chapter 6 Existing FM Global comments have been retained in the appropriate sections Anew FM Global comment has been added after 6 2 1 17 Various items in Chapter 7 have been revised primarily relating to Approval listing requirements Also FM Global comment has been added after 7 3 4 2 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4 Stationary Pumps for Fire Protection Page 4 FM Global Property Loss Prevention Data Sheets 18 NFPA has added and
53. int Use 10 psi increments for each additional pump a Each controller for multiple pump installations shall have its own individual pressure sensing line b The pressure sensing line connection shall be made between the pump discharge check valve and the discharge control valve 4 Where minimum run times are provided the pump will continue to operate after attaining these pressures The final pressures should not exceed the pressure rating of the system 5 Where the operating differential of pressure switches does not permit these settings the settings should be as close as equipment will permit The settings should be established by pressures observed on test gauges 6 Example Pump 1000 gpm 100 psi pump with churn pressure of 115 psi Suction Supply 50 psi from city minimum static 60 psi from city maximum static Jockey pump stop 115 50 165 psi Jockey pump start 165 10 155 psi Fire pump stop 115 50 165 psi Fire pump start 155 5 150 psi Fire pump maximum churn 115 60 175 psi For SI units 1 psi 0 0689 bar 7 Where minimum run timers are provided the pumps will continue to operate at churn pressure beyond the stop setting The final pressures should not exceed the pressure rating of the system components If the fire pump unit is started automatically by waterflow an FM Approved manual controller except the straight mechanically operated type may be used These controllers either have
54. ion pressure sensing line is less than the pressure setting of the pilot control Closing the 1 2 in 12 7 mm drain valve 10 should cause the pressure in the suction pressure sensing line 7 to increase and the pilot controlled valve 5 to open WATER SUPPLY GRAPH 1 25 TC j j jJ d DN 1 gt 4 CHECK SCALE 7 USED K 1321 110 7283 PRINTED IN VSA Fig FM A 2 3 Water supply graph 2 1 4 Stored Supply Stored water sources should be filled at a rate adequate to provide sufficient water stor age within 8 hours to supply the demand the pump s is required to meet for the expected duration In the event the stored source is oversized it should be filled to its capacity at a rate at least equal to the 8 hour rate established above 2 3 Rated Pump Capacities The capacity and pressure of a fire pump should be determined for each indi vidual fire protection system after due consideration of all the factors involved Where pumps are to sup ply automatic sprinklers and or hose streams hydrants refer to FM Global Data Sheet 2 8N Installation of 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4 Stationary Pumps for Fire Protection Page 8 FM Global Property Loss Prevention Data Sheets 7 Wegen i 9 IO IS 7 Suction pressure sensing line 8 Strainer with sediment blowoff 9 Union with X in 2 3 orifice 10
55. istered NO 573951 England Copyright 1993 Cummins Engine Company Inc Rights Reserved Page 1 of 2 Fig 2 4 1 5 1 Cummins campaign 9209 details 02002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 53 9378 2 If the new option is installed an engine presently in service and the existing belt guard cannot be removed modify the belt guard as shown in the illustration to allow clearance for the new belt tensioner 25mm Radius in Corners A Alternator Pulley Tensioner Pulley C idiler Pulley D Belt Page 2 of 2 Fig 2 4 1 5 1 Cummins campaign 9209 details 02002 Factory Mutual Insurance Company All rights reserved
56. it is necessary to open the bypass valve in addition to adjusting the pressure regulator to obtain an adequate cooling water flow rate do not exceed the maximum recommended pressure for the particu lar heat exchanger The maximum recommended pressure could be as low as 50 to 60 psi 345 to 413 kPa 3 45 to 4 13 bar If the engine overheats a copy of the report noting the manufacturer serial number and condition of the engine and the remedy s taken should be sent to FM Global The chart Figure FM 11 4 is intended to aid in checking tests of centrifugal fire pumps It provides a means of obtaining a consistent rating A pump is an important unit of the fire protection system and as such should be properly maintained If a pump test indicates a poor rating or there is more than a minor change between tests in the good rating range the cause should be ascertained and the condition remedied without delay 2002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4 FM Global Property Loss Prevention Data Sheets Page 29 s 120 140 D 1 dad o c H LA lt 9 LL Si a v Percent of Pump Rating Fig FM 11 4 Rating chart for centrifugal fire pumps Capacity Tests The condition of each pump should be determined at least annually by an operating test At least three well spaced pressu
57. itial startup and acceptance test li installation of an emergency power source for electric motor driven pumps must be installed and accepted in accordance with NFPA 110 Standard for Emergency and Standby Power Systems impeller replacement now requires a complete retest and performance equal to the original pump shop test required for all new pumps 16 11 2 7 1 now allows six starts and stops for acceptance instead of the previous ten However 11 2 7 1 points out that other required tests accrue to these six which will result in greater than six 2 0 LOSS PREVENTION RECOMMENDATIONS 2 1 Introduction The following general items relate to the general FM Global approach to NFPA standards Specific comments and exceptions to NFPA 20 are addressed in section 2 2 1 2 1 1 Shall versus Should In most if not all instances the widespread use in the text of the mandatory shall within an NFPA standard can be replaced by the more permissive should This is in keeping with other FM Global standards 2 1 2 Authority Having Jurisdiction There may be references in an NFPA standard to the term authority having jurisdiction or other similar term Legally this could mean the state fire marshal the local fire department or some other state munici pal or governmental office In the application of this data sheet the reference is solely to FM Global unless the legal authority takes precedence 2 1 3 Related NFPA or Other Stan
58. ke system would permit the engine to start and run by command from the CONTROLLER However upon signal to STOP the unit would continue running Since the STOP signal also effects the closing of the raw water solenoid valve the unit would fail due to overheating Should such break occur major expense and considerable lost time would be involved to repair the engine Furthermore the facility served by the pump would be without the safety protection provided by the pump during the service interval A campaign has been initiated to replace the spring on your unit 15 MANDATORY THAT YOU CHANGE THIS SPRING The enclosed replacement spring has a blue strip for ease of identification You should make arrangement to have this spring installed immediately Detailed instructions are enclosed and the job can be completed in less than a minute without special tools or training Insurance agencies have been notified of this situation and their field inspectors will be looking for the presence of the replacement spring If you have any questions regarding this situation or the instructions provided please me at A C 513 771 2200 X307 Collect calls will be accepted if you identify your as relating to a MD Fire Pump Campaign Thank you Very truly yours Dane Petrie Manager Sales Operations Fire Pump Products Enclosure 1 Installation Instructions 2 Spring Blue Stripped Fig 2 4 1 1 1 Clarke notification 200
59. l Property Loss Prevention Data Sheets To Sprinklers if pera OG 6 maximum velocity approximately 1 t sec 0 3 m sec a Suggested size of pump room for one pump 12 by 16 by 10 f 3 7 by 4 9 by 3 0 m high Larger rooms for multipe pump inetalistions Walls of noncombostibie construction brick tile concrete or Dorrugated abertos on steel frame lest suitable oniy where climate makes beating unnecessary Floor of concreta Nencombustible roof otherwim install Trish rack flat or round steel bare spaced 2 to 3 in apart Roof ketch Solenoid nil valve lina ahaft bearings when required Discharge gage Automatic nir Preusure reliat vaiva viste cont and waste pipe when required Ducharge check valve Discharge valve Discharge pipe Vertical holtew ghaft electric motor or epproved right engle guar Hunm connmection vali Bal drip when required Approved flew mater hom header and hoes valves Fig FM A 4 2 2 2 a Vertical shaft turbine type fire pump installation with section from wet pit Fig FM A 4 2 2 2 b Sump dimensions plan view 02002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 15 Screen Trash Rack Fig FM A 4 2 2 2 c Sump dimensions elevation view Figures FM A 4 2 2 2 b and A 4 2 2 2 c illustrate dimensions recommend
60. ll usually clear it However local authorities sometimes require separate overcurrent protection for the feeder or the own ers desire it for more precise protection of lone expensive feeder In this event an air circuit breaker should be used It should have an interrupting rating sufficient to withstand the maximum short circuit current avail able at the point of connection to the power system If a manual disconnect switch or overcurrent protective device is provided in the fire pump feeder circuit it should be in a locked box or cabinet or otherwise locked in the closed position The box cabinet or switch should be clearly identified FIRE PUMP FEEDER CIRCUIT If the plant power supply is through local transformers and the main switchboard for the plant load is exposed to damage by fire the fire pump feeder should be connected to the secondary leads of the transformers ahead of all disconnecting means If the main switchboard is not exposed to damage by fire this circuit may be taken from the main switchboard if connected ahead of all circuit breakers or fuses in the secondary circuit A means for disconnecting the plant circuits from the power supply should be provided located so as to be accessible in event of a fire in the property protected or in exposing property 6 5 Motors Where the motor is supplied from 208 A or 416 volt system motors designed for these voltages should be used Motors should be made according to specificati
61. lves to allow downsizing of sprinkler system piping and fittings 8 2 13 6 NFPA 20 deleted the exception to allow piping relief valves back to suction piping While FM Global comments in Data Sheet 3 7N would allow this under certain conditions the NFPA 20 committee cited the fact that pressure is not in fact relieved and that relief valves are not designed for use in this way effects of backpressure are unknown 9 2 22 NFPA 20 has added a section at the end of Chapter 2 requiring that all pumps drivers fuel tanks con trollers etc be attached to resist 0 5G when local codes require seismic protection FM Global comment refers to Data Sheet 2 8 Earthquake Protection for Water Based Fire Protection Systems 10 3 1 NFPA 20 has eliminated the 500 1890 L min limitation for in line and end suction pumps which is consistent with existing Factory Mutual Research Approval guidelines 11 4 2 2 2 New FM Global text and associated figures have been added to provide Hydraulics Institute guidelines for design of wet pits 12 20 has deleted Chapter 5 on High Rise Buildings citing that these installations are quite com mon and have no need for special attention or exceptions NFPA 20 has reserved the space for use in the future for water mist and foam water pump criteria now under development Factory Mutual Research boldface guidance for high rise buildings will continue to be included 02002 Factory Mutual Insurance Compa
62. ly empty tank This will only occur in instances of long suction piping or cases where there are many elbows of other fittings Equivalent lengths for elbows and fittings should be included in calculations C 70 should be used in calculations 2 9 5 Valves The listed OS amp Y gate valve should be the same size as indicated in Table 2 20 column headed Suction in It may be installed in the pump room on the inlet side of the eccentric suction reducer if provided See Figure FM A 3 3 1 a The disc in a butterfly valve decreases the flow area in the valve body and necessarily provides an increased head loss compared with a gate valve of equal size The disc inherently causes turbulence For these reasons a butterfly valve should not be installed in pump suction piping 2 9 6 3 As stated in the Hydraulic Institute Standards for Centrifugal Rotary and Reciprocating Pumps there is always an uneven flow in an elbow and when it is installed in any position other than in a plane at right angles to the pump shaft of a horizontal split case pump this uneven flow causes more water to enter one side of the impeller than enters the other side This causes a reduction in capacity and efficiency as well as a thrust that may heat the thrust bearing and possibly cause rapid wear of that bearing The unequal flow dis tribution may also cause impeller damage due to cavitation and or flow separation In cases where the elbow cannot be installed perp
63. mally Open 275 84m Fire Dept Connection Low Zone Fire Purnp Fig FM 2 3 e Two zone system This emergency source of power may be provided either by dedicated standby engine driven generators or by emergency power sources for services essential to the safety and welfare of high rise building occu pants In the latter case the capacity of the emergency power source should be capable of supplying the total demand including that for the fire pump 2 4 FM FM Global Equipment Alerts 2 4 1 Diesel Engine Drivers 02002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4 FM Global Property Loss Prevention Data Sheets Page 35 2 4 1 1 Clarke GM Diesel Models MD 3 4 MD 6 and 6 MD Fire Pump first pub lished October 1989 RECOMMENDATION When a Clarke diesel engine Model MD 3 MD 4 MD 6 and MD 6T is located determine if its date of manu facture is between April 1986 and December 1988 If the engine was manufactured between these dates determine if the governor spring has been replaced with a blue stripped spring supplied by Clarke GM Diesel If the governor spring has not been replaced contact Paul Canter at 513 771 2000 Extension 339 for a replacement spring DISCUSSION All Model MD 3 MD 4 MD 6 and MD 6T engines manufactured between April 1986 and December 1988 have not been located by Clarke Because of the serious r
64. ny All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 5 13 Over the past several editions of NFPA 20 Chapter 6 covering the requirements for sources and trans mission of electrical power to motors driving fire pumps have been completely rewritten to align with NFPA 70 National Electric Code Article 695 Fire Pumps as well as other articles where necessary FM Global comments from the previous Data Sheet 3 7N have been revised and deleted where necessary Two specific additional FM Global comments are a An FM Global comment has been added after A 6 3 1 2 to state that while circuit breakers within FM Approved controllers may be rated greater than 125 full load motor current feeders need not be similarly sized b In the FM Global comment after 6 3 2 performance guidelines for reliable electric feed have been added 14 NFPA 20 Chapter 8 Diesel Engine Drive now allows the use of radiator cooled diesel engines While this is consistent with the current position in Data Sheet 3 7N NFPA 20 has also incorporated more detailed guidance for ventilation in the pump house to ensure proper air flow for cooling of radiator cooled engines 15 NFPA 20 Chapter 11 Acceptance Testing Performance and Maintenance now includes requirement that all wiring for the installation be completed and inspected by the electrical contractor prior to the in
65. of construction Where the fire pump room is located within or attached to a building being protected the pump room should be structurally strong enough to with stand anticipated fire exposure and impacts be fully sprinklered and have access from outside Minimum fire rating of room construction should be at least 1 hour In no case should the fire pump room be located within or attached to an unprotected building 02002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 9 To lessen the likelihood of flooding the pump house floor should be at or above the surrounding ground level 2 8 Pipe and Fittings Pressure sensing lines and fittings should be copper or brass 2 9 3 Suction Size The size of the suction pipe for single and or multiple pumps should be such that the velocity does not exceed 15 ft sec 4 6 m sec when the pumps are operating at 150 of rated capacity see Table FM 2 9 3 Table FM 2 9 3 Flow Required to Create 15 ft sec 6 280 Velocity mm Umi L min Ge ee 1 i E EJ 5 T oe SCH ER 64 850 305 19985 350 14 6330 1325 356 23960 E Se EC 1 27 3560 Additionally friction loss between any suction tank and pump suction inlet s should not exceed mately 6 psi 0 4 bar which will ensure adequate net positive suction head for conditions of a near
66. of this sheet Locate the fuel injection pump governor the left side of the engine The throttle stop spring approximately 44 long is located between the governor and the engine block The top hook is connected to the governor lever and the bottom hook is connected to a fixed bracket See photo B on back of this sheet Remove the bottom hook of the old spring then remove the top nook Discard the old spring The new replacement spring enclosed is painted with a blue Strip Install the replacement spring with the long hook on the top and the short hook the bottom Both hooks should be pointed towards the engine See photo C on back of this sheet Test run to verify operation Use the manual controls on the controller for this test run Start engine allow speed to stabilize then stop engine Reset all controls for automatic stand by mode Fig 2 4 1 1 3 Clarke instructions for governor spring replacement 2002 Factory Mutual Insurance Company All rights reserved FM Global Property Loss Prevention Data Sheets Page 39 Fig 2 4 1 1 5 Photo B 2002 Factory Mutual Insurance Company All rights reserved 13 4 Stationary Pumps for Fire Protection Page 40 FM Global Property Loss Prevention Data Sheets Fig 2 4 1 1 6 Photo C 2 4 1 2 Cummins Engine Company Models V 378 and V 504 Fire Pump Engines Return Fuel Plumb ing Cummins Campaign No 8422 first published April 1985 RECOMMENDAT
67. ons of the National Electrical Manufacturers Association NEMA or Canadian Electrical Manufacturers Association CEMA The horsepower ratings of motors having a temperature rise rating other than 40 or not having speci fied service factor or having a service factor of 1 0 should at least equal the maximum brake horsepower needed to drive the fire pump at the pump maximum load condition even if that occurs at a flow point beyond 15096 of the pump rating 7 5 Starting and Control 02002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 18 FM Global Property Loss Prevention Data Sheets Starting and Stopping Fire pump and booster pump units supplying water to sprinklers and hoses should be arranged for automatic starting and manual stopping The intent of manual stopping is that whenever the pumps starts the pump house should be visited by appropriate personnel to determine that the pump unit is running properly and to make sure that the pump is not stopped until it is ascertained that pump starting causes have returned to normal and that any fire emergency has been successfully resolved A fire pump or booster pump unit should not start frequently to maintain pressure in the fire protection sys tem However it should start as soon as a dry pipe preaction or deluge system has tripped or one or more sprinkler heads on wet pipe system has operated Where there is more than one s
68. oss the line squirrel cage electric motor drive only 3 3 4 Pipeline Strainer Turbulent flow created by components located upstream from the pump suction inlet should be minimized so that pump performance is not compromised The distance of 10 pipe diameters is considered by the water control industry as an acceptable distance 4 1 1 Suitability Pumps should be chosen for the conditions under which they will operate Consideration should be given to the amount of water and pressures required at the pump discharge gage for automatic sprinklers and hose streams See Figure FM 4 1 1 Vertical shaft pumps are particularly adaptable for installation on streams subject to flood flow The use of these pumps is also recommended where an automatically controlled pump is desired and the physical con ditions are such that horizontal shaft pump would have to take suction under lift Since vertical shaft turbine type pumps do not require priming their use under this condition eliminates the need for complicated automatic priming equipment The use of deep wells for direct fire pump service is undesirable if the maximum length of column pipe and bowl assembly would exceed 100 to 150 ft 30 to 45 m Breakdown is more likely to occur with long shafts and repairs would take more time To meet the required ground level pressure the head rating of the pump would have to be increased likewise this would increase the horsepower capacity of the driver Deep w
69. p is operated within the design limits of its suction lift This can be done by use of the following relations 1 The gpm is proportional to the velocity of the water and therefore to the velocity of the impeller or rpm 2 Net head is proportional to the square of the velocity of the water and therefore to the square of the rpm Occasionally a field acceptance test will indicate the advisability of change in impeller diameter It is pos sible to determine approximately the effect on the head characteristic of cutting down the diameter of a given impeller The velocity of the water is proportional to the diameter of the impeller at a constant rpm and therefore is proportional to the impeller diameter and net head to the impeller diameter square 11 2 6 3 3 At any rate of pump discharge the average value of the current in the three phases does not exceed 115 of the nameplate current for 40 C temperature rise motors or for 1 15 service factor motors It does not exceed 10096 of the nameplate current for 50 C or 55 C temperature rise motors or for motors having ser vice factor of 1 0 However because of normal variations in the usual test equipment observed readings may vary as much as 5 from true values Therefore observed currents up to 120 may be accepted for 40 or 1 15 service factor motors and up to 10596 for 50 55 or 1 0 service factor motors Flow points should be chosen so that the current curve passes its m
70. ping should be manual Setting the run period timer to Zero is not an acceptable means of converting from automatic stop to manual stop Approved methods for achieving this conversion are listed in the Factory Mutual Approval Guide for each controller equipped with run period timer Some controllers when arranged for manual stop and with the run period timer set at Zero are subject to cycling under the dictates of the pressure switch Run period timers should be checked regularly to insure they are set at not less than two to three minutes to prevent cycling 9 6 7 Alarm and Signal Devices on the Controller Power failure relays are not generally required on FM Global installations except as recommended in the FM Global comment for NFPA 20 Section 8 6 5 to maintain operation in cold temperatures during power failures 9 6 10 Fire Protection Equipment Control Battery power for initiating a signal for engine starting should be from batteries other than the engine starting batteries 10 1 2 Turbines Steam turbines of good quality and design and otherwise meeting the requirements of fire pump service are acceptable Turbines designed to operate at less than 80 psi 552 kPa 5 5 bar are not acceptable When normal operating boiler steam pressure is between 80 and 120 psi 552 and 827 kPa 5 5 and 8 3 bar the turbine should be capable of driving the pump at its rated soeed and maximum pump load with a steam pres sure as low as
71. quently engine overheating causes extensive engine damage even to the extent of engine replacement Installation of option EH 9993 Campaign Kit Part 3803640 is critical as the belt can fail in the first 25 hours of operation The following information in Figure 2 4 1 5 1 from Cummins provides details 2 4 1 6 Cummins Engine Company Inc Fuel Lift Pump Fire Pump Engines Models 6 5 9 1 and 6BTA5 9 first published July 1993 DISCUSSION The following is for information only No action is required Cummins Engine Co requested and received FM Approval to allow engine distributors to add a fuel lift pump to engines where required If the fuel lift pump is required after the engine is shipped from the factory the dis tributor may install it in the field without violating approval More and more areas throughout the country are requiring the fuel tank installed on the ground instead of elevated as recommended in Data Sheet 3 7N and NFPA 20 This requires the addition of a fuel lift pump Option FS 9025 includes the parts necessary for installation of the fuel lift pump Part Number 4 0 REFERENCES 1 NFPA 20 Standard for the Installation of Stationary Pumps for Fire Protection 1999 edition 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 AN Page 52 Stationary Pumps for Fire Protection FM Global Property Loss Prevention Data Sheets Service Parts i I T May 1993 Topics Ma
72. re and flow points shut off or churn near rating and at or near 150 of rat ing except as noted in NFPA 20 Section A 2 1 2 should be compared with the Field Acceptance Test is avail able not the theoretical or manufacturer s curve In the event water disposal is a problem obtain the shut off pressure and a point near 150 of rated capacity It is a FM Global practice to have representative witness such capacity tests The test is made by discharging water through an FM Approved flow meter or by discharging water through hose s attached to yard hydrant s or directly to a hose header The rate at which water is discharged by the pump may be read directly from the FM Approved flow meter Many points can be obtained quickly with minimum water discharge when a flow meter is available for testing The rate at which water is discharged from a hose nozzle is measured by comparing readings taken with a pitot tube and pressure gage and those in the FM Global Nozzle Discharge Table Pump performance should be compared with the Field Acceptance Test see NFPA 20 Section 11 2 and any previous test A reduction in capacity of up to 10 over the life of the pump due to normal wear is tolerable Normally there is no more than a slightly noticeable difference if any between tests More than a slightly noticeable reduction in capacity may be due to one or more of number of causes as shown in Appendix B plugged impeller and obstructed suction are among the more
73. relay for remote control by waterflow or may be ordered with this relay Some FM Approved manual controllers have the waterflow control circuit so arranged that the motor will start when this circuit is opened and will run continuously until shut down manually These controllers are suitable for use with any FM Approved waterflow device Other FM Approved manual controllers start the motor when this control circuit is opened and stop it when the control circuit is again closed They are suitable only for use with dry pipe or deluge valves The circuit to waterflow devices should normally be closed and should be electrically supervised Automatic control of the motor should be by waterflow instead of water pressure under the following conditions a Where the water pressure fluctuates so much that a satisfactory cut in pressure cannot be obtained b Where the hydraulic conditions and pump location are such that the opening of a moderate number of sprinklers does not cause an appreciable drop in pressure at the pump c Where the pressure of the water supply is satisfactory for ordinary occupancies but a hazardous occupancy area makes an immediate increase in water pressure desirable should one or more sprinklers be opened by a fire in the hazardous area See Section 2 5 for pressure recorder recommendations 7 5 2 4 Sequence Starting of Pumps see FM Comment after Figure FM A 7 5 2 1 Delay stating an electric motor driven pump only if the capacity
74. rn line as shown in Figure 2 4 1 2 6 10 Open the fuel supply line to the engine fuel pump 11 Start operate the engine at rated speed and check for fuel leaks Correct as required 12 Shut off the engine Notify operating personnel that the engine is ready for service Obtain authorized signature of acceptance 2002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 45 Fuel flow diagram V 378 F V 504 F Engines Check Valve injector Return Line Check Valve Supply Line Fuel Shut Off Storage Solenoid Tank Fuel Pump Drain Line Fuel Filter Fuel Pump Note Max Fuel Height Above Solenoid is 72 inches Fig 2 4 1 2 5 Fuel flow diagram V 378 F V 504 F engines Injector Return Fuel Pump Return Fig 2 4 1 2 6 Fuel supply tank 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4N Stationary Pumps for Fire Protection Page 46 FM Global Property Loss Prevention Data Sheets 2 4 1 3 Cummins Engine Company Models NT855F3 NT855F4 NTA855F NTTA855F Fire Pump Drive Engines Cummins Campaign No 8532 RECOMMENDATION Anytime a Model NT855F3 NT855F4 NTA855F NTTA855F engine driving a fire pump is located check its serial numbers against those in this data sheet to ascertain whether the recommended modification is needed or has been made If the recommended modif
75. rse ratchets supplied as an integral part of vertical hollow shaft motors are capable of with standing full voltage starting torque of the motor if power phase reversal occurs for any reason See Fig ure FM 4 1 1 A vertical shaft turbine type pump should not be allowed to rotate in the reverse direction because of the possibility the line shaft will unscrew at one or more line shaft couplings 6 1 General The electrical equipment should conform to the National Electric Code Canadian Electric Code British Standard Code of Practice or other local codes as required When expansion or occupancy changes in plants having an electric motor driven fire pump require the installation of a second fire pump consideration should be given to installing pump driven by a diesel engine 6 3 Power Supply Lines The pump circuit between its entrance to the site and the pump room should preferably be buried How ever when properly protected against damage by fire wind or lightning it may be acceptable to locate this circuit 1 in rigid steel conduit on the outside of an exterior wall of fire resistive building 2 in a conduit over or inside a fire resistive building having noncombustible occupancy 3 in messenger supported cables or open wire over the roof of fire resistive building having noncombustible occupancy or 4 overhead on poles in the plant yard where not exposed to potential damage from storage or operations In no case should the circuit
76. rvices Inc FFH 852T 1 2 1 mmm 1 FFV 852T 1 FFV 852T 2 FFV 852T 2 FFH 1136T 1 2 FFV 1136T 1 2 FFH 1704T 1 2 FFV 1704T 1 2 Waukesha Engine Division F476DSUF F476DSUF 210 __ ee F674DSUF F674DSUF F674DSIUF F674DSIUF 210 18 8 H866DSIUF H866DSIUF H867DSIUF Minimum pressure and maximum pressure can be obtained from the local engine distributor The rate at which water is discharged from the heat exchanger and exhaust manifold should be checked Compare the cooling water discharge rate with previous observations and or the recommended rate Usually 5 gal 18 9 dm container and a watch with a second hand are all the equipment that is required for the cooling water flow check All engine overheating problems should be corrected immediately There are several corrective measures that can be taken to increase cooling water flow rates and to reduce overheating 1 Check and clean as necessary the in line strainer if installed 2 Check the valves solenoid and manual in the cooling water piping valve on each side of the pressure reducing regulator should be open valves on the bypass should be closed 3 Increase the water flow through the heat exchanger by adjusting the pressure reducing regulator 4 Open the bypass valve 5 Replace the heat exchanger and or water cooled exhaust manifold 6 Check any thermostat in the engine cooling water system for proper operation CAUTION If
77. s If Campaign 8815 does apply determine if the recommended modification to the control panel wiring has been completed If the recommended modification has not been completed recommend that arrangements be made with the local Cummins distributor to complete repairs under Campaign 8815 without delay DISCUSSION An unknown number of Models 855 NT 855 F4 NT 855 F5 NT 855 F6 NTA 855 F and NTTA 855 F fire pump drive engines have been shipped to the field with incorrect control panel wiring in accor dance with an incorrect wiring diagram The incorrect wiring can cause the controller to lock in on a weak battery and prevent the engine from starting Engines with serial numbers on the Campaign 8815 list should be checked by a Cummins distributor per Campaign 8815 regardless of age or warranty status 02002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4 FM Global Property Loss Prevention Data Sheets Page 47 CUMMINS ENGINE COMPANY ATTN WARRANTY AND OR 8532 BOX 3005 SERVICE MANAGERS COLUMBUS IN 47202 3005 CAMPAIGN DECEMBER 13 1985 SUBJECT NT855F3 F4 NTAB55F NTTASSSF SPEED SWITCHES EXPIRATION DATE CONTACT CAROLYN HIOTT 812 377 8152 CAMPAIGN NO 8532 DECEMBER 31 1586 DESCRIPTION A LIMITED NUMBER OF NT FIRE PUMP DRIVE ENGINES MAY HAVE BEEN SHIPPED TO THE FIELD WITH A DEFECTIVE UNITED TECHNOLOGIES SPEED SWITCH MODEL SWA 675 INSTALLE
78. s within the site location that could damage the feed 2 not be exposed to electrical mechanical problems created by non fire protection equipment connected to the same feed note that electrical mechanical problems for the fire protection equipment itself is already covered by the various requirements in the relevant Approval Standards and 3 Be arranged so that disconnection will not be made during fire event by plant staff fire department or others The primary fuses that protect transformers supplying power to the motor should be so rated as not to open under locked rotor current of the motor in addition to any plant load for an indefinite period Ground fault protection circuit interrupter should not be installed in any portion of the circuit service trans former or feeder which supplies power to the fire pump controller including the electric utility If the ground fault protection must be provided it should be set above the motor locked rotor current and also set so that it will not operate on motor start up Feeder Overcurrent Protection Separate overcurrent protection is not required for the fire pump feeder Expe rience shows that short circuits are unlikely to occur in properly arranged fire pump feeder and such pro tection is usually omitted to eliminate another possible source of trouble that may interrupt the power supply to the fire pump If short circuit should occur protective devices farther back on the system wi
79. scharge air duct to reduce the pump room heating load during engine operation Air obtained from bypass should be ducted to prevent it from recirculating directly back to the engine cooling air intake 8 3 2 Ventilation For heat exchanger cooled Diesel Engine each opening for intake and discharge ventilation in the pump room should be at least 0 75 in Hp 6 5 cm KW 8 4 5 Fuel Supply Location The engine fuel supply line should terminate above the ends of the fill and return lines Fuel lines to the engine should be connected near the tank bottom and should be equipped with manual cock valve at the tank This valve should be locked open or equipped with an automatic supervisory device Metal braided or other substantially designed flexible connectors should be used where fuel lines are attached to the engine 8 5 3 Exhaust Piping Automotive type mufflers are not recommended because of their light construction and tendency to cause too much back pressure The pipe should be covered with high temperature insulation up to 6 ft 1 8 m above the floor or otherwise guarded to protect personnel from injury 8 6 5 Temperature Maintenance All engines should be equipped with jacket water heater capable of maintaining the temperature at 120 F 49 C Teflon hose with braided stainless steel jacket should be used on the outlet side of the water heater This prevents premature hose failure caused by high heater outlet water temperatures
80. tationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 49 DATE May 2 1986 TO DIST D AL LOC DIST DIV REG DIST NDIV RSM DIST Intl FROM Hiott SUBJECT 8532A Field Campaign Speed Switch CUMMINS ENGINE BOX 3005 COLUMBUS IN 47202 3005 TO Warranty and or Service Managers Worldwide Distributors and Branches RRR REE K kk KERR kk k kk kk kk EEE FIELD 8532 2 1986 Amendment SUBJECT NT855F3 F4 NTAB55F NTTA855F Speed Switches eee ee ps mm mmm d EXPIRATION DATE December 31 1986 lt lt lt lt me me mm CONTACT Carolyn Hiott 812 377 B152 deck ocho Kk KT HEIKKI KKK EEE OR ORO ORC ERE RRR EERE c e e DESCRIPTION See Campaign 8532 dated December 13 1986 See below for added Engine Serial Numbers and locations Engine Serial Locations Engine Serial Locations 18109566 St Louis 18109959 CIC 18109716 Edmonton 18109960 i 18109720 Columbus OH 11308163 18109784 i 11308164 18109819 B 11308165 7 18109820 Tampa Fl 11315526 18109821 11315527 S 18109825 11315528 i 18109826 Korea 11312958 18109828 Phoenix 11312959 18109940 Columbus 11312960
81. uch unit the starting pressure should be approximately the same FM Approved Manual Controllers Motor Starter The manual motor starter has an external handle that moves in one direction only from the initial to the final position This handle closes the motor circuit switching mechanism mechanically without dependence upon any electrical control circuits magnets or equivalent devices The motor starter returns automatically to the OFF position if the operator releases the starter handle in any but the full running position The only exception to this is in the case of the primary resistance type where overheating by the starting current is prevented by other acceptable methods In addition except where a circuit breaker is used to start the motor means is provided in the controller for electrically starting and stopping the motor Additional control stations for starting the motor may be provided at locations remote from the controller but such stations should not be operable to stop the motor 7 5 2 Automatic Controller Fire pump units may be controlled automatically by a predetermined change in water pressure by water flow or by combination of these two factors Control by water pressure is most common If the fire pump unit is to be started automatically by a change in water pressure an FM Approved combined manual and automatic controller should be used The controller should be arranged so that it starts the pump unit auto maticall
82. y 193 ____________ 93 8 2 A 08 B Series New Drive For 6BTA F1 and F2 Fire Pump Engines Troubisshoothng A Manual Shop Manual Manual Abernative Manual Specficatione Manual Other 3810374 01 A new Front Drive Option EH9993 has been introduced for the 6BTA F1 and F2 Fire Pump Drive engines This new front drive arrangement has been released to stop slippage and squealing resulting from high alternator loads and belt slipping resulting from tensioner resonance This option can be retrofitted to existing engines in the field with the addition of a new belt guard Part Number 3921751 or modifying the existing belt guard The new arrangement option 9993 contains the following Part Number 3900635 3901445 3903095 3904446 3911587 3920541 3921533 3921988 3922900 3922982 Quantity a A Description Screw Hex Flange Head Screw Hex Flange Head Screw Flat Head Cap Screw Hex Flange Head V Ribbed Bracket Tensioner Shield Dust Shaft Idler Tensioner Belt Pulley Idler This option has become standard for the 6BTA F1 and F2 engines after engine serial number 44764160 Cummins Engine Company Inc Columbus Indiana 47202 3005 Cummins Engine Company Ltd Daventry Northants England NN11 SNU Registered Office 46 50 Coombe Road New Maiden Surrey AC Reg
83. y and permits it to run until it is show down manually 7 5 2 1 See Figure FM A 7 5 2 1 Use this arrangement for piping to pressure switch Q Not Less Than 5 0 Bronze check valve with 3 32 in WG orifice or ground i union noncorrosive diaphragm having 3 32 in 2 mm orifice Not less than 1 2 in 13 mm brass pipe or copper tubing and fittings located outside controller 1 2 by 1 2 by 1 4 in 13 by 13 by 6 mm tee 1 4 in 6 mm brass pipe Pressure switch 1 2 by 1 2 by 1 4 in 6 mm opening for test gage plugged 1 2 in 13 mm globe valves for testing automatic mechanism of controller Relief valve Fig FM A 7 5 2 1 Acceptable piping connection for automatic fire pump control by system pressure Water Pressure Control The pressure switch should be specifically listed for fire pump service Fire Pump Settings from NFPA 20 Section A 11 2 6 d The fire pump system when started by pressure drop should be arranged as follows 02002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4 FM Global Property Loss Prevention Data Sheets Page 19 1 The jockey pump stop point should equal the pump churn pressure plus the minimum static supply pressure 2 The jockey pump start point should be at least 10 psi less than the jockey pump stop point 3 The fire pump start point should be 5 psi less than the jockey pump start po
84. y of creating hydraulic imbalance within the pump and the inability to check the suction supply and piping upstream of the connection to the pump suction Piping should be large enough for at least 150 of rated pump capacity but not smaller than shown in Table 2 20 Every fire pump engine gasoline gas diesel should be checked for overheating by running at least yearly with the pump discharging 150 or more of its rated capacity Once the engine temperature has stabilized the engine should be run for at least an additional 15 minutes 2002 Factory Mutual Insurance Company All rights reserved 3 7N 13 4 Stationary Pumps for Fire Protection Page 26 FM Global Property Loss Prevention Data Sheets If the engine overheats it is probably due to inadequate cooling water flow caused by obstruction in the cooling water system 2002 Factory Mutual Insurance Company All rights reserved 3 7N Stationary Pumps for Fire Protection 13 4N FM Global Property Loss Prevention Data Sheets Page 27 Recommended cooling water flow rates are as follows Engine Make Minimum Acceptable Heat and Exchanger Flow Rate Model Number gal min dm min Caterpillar Tractor C 3306 PL2286 PL6819 PL6818 5069 3306 PL2285 PL6820 PL6821 6206 3406 PL2287 PLGB22 PLGB28 m 569 3406 PL2288 6824 210 569 O 3408 PL2289 PLOB20 210 0 3408 PL2313 PLOE28 210 50

STATIONARY PUMPS FOR FIRE PROTECTION

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