Pump Room Calculators
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NFPA20 18.104.22.168 “…Engines shall have a 4 hour minimum horsepower rating equal to or greater than the brake horsepower required to drive the pump at its rated speed under any conditions listed for environmental conditions under pump load.”
NFPA20 22.214.171.124 Each engine will have an independent exhaust system.
A proper inlet louver and ventilating system must “Limit the temperature for the pump room at 49C (120F) at the air cleaner inlet with the engine running at rated load” (126.96.36.199.1) , “Supply adequate air for engine combustion (188.8.131.52.2), and “remove hazardous vapors” (184.108.40.206.3).
FM 1333 3.6.1 “Liquid cooling systems shall be equipped with a raw water supply loop for control of raw water flow to all cooling devices.” FM 1333 4.36.1 “Raw water supply loops shall be capable of providing the required flow to the engine cooling devices with straining devices restricted by 50 percent, a minimum inlet pressure, and the pressure regulators set for the maximum inlet pressure of the cooling devices.”
NFPA 20 220.127.116.11.1 “Fuel supply tank(s) shall have a capacity at least equal to 1 gallon per hp (5.07L per KW), plus 5% for expansion and 5% volume for sump.”
NFPA20 18.104.22.168 “Variable speed pressure limiting control or variable speed suction limiting control systems used on diesel engines for fire pump drive shall be listed for fire pump service and be capable of limiting the pump output total rated head (pressure) or suction pressure by reducing pump speed.”