A-A-58003F
be capable of delivering water at a flow rate in accordance with NFPA 1901 for the certified
capacity of the water tank provided. The tank to pump valve(s) shall be air or electrically
actuated.
2.9 Foam proportioning system. The vehicle shall be equipped with an electronic, variable
speed, fully automatic, discharge side, direct injection foam proportioning system for both Class
A and Class B foam concentrates. It shall be in accordance with NFPA 1901. With 0.5%
concentration of Class A foam, the system shall properly proportion foam for flow rates of up to
and including 1,000 gpm. The system shall also accommodate 1% Class A foam concentrate as
well as 3% and 6% Class B foam concentrates. Tanks with a minimum usable capacity of 25
gallons each shall be provided for both Class A and Class B foam concentrates. Each foam
concentrate tank shall be provided with a minimum of a 1-inch NST female foam tank fill
connection, with a rocker lug plug and a replaceable mesh strainer, in a location readily
accessible from the ground. Each fill connection shall be provided with a check valve to prevent
loss of foam concentrate when connection or disconnection is made.
2.9.1 Compressed Air Foam System. When required (see 6.2) a PTO driven, minimum 140 cfm
capacity compressed air foam system shall be provided. The system shall supply three
discharges with compressed air foam. It shall be capable of providing foam solution or
compressed air foam to all of the specified CAFS discharges simultaneously. Automatic pressure
regulation shall be provided to maintain the air pressure within plus or minus 5% of the water
pump pressure, throughout the pressure range. The air compressor shall be an oil flooded rotary
screw type. Controls shall be installed allowing proportioning rates from less than 0.1% to
greater than 3%. Each CAF capable discharge shall feature a check valve to prevent reverse
flows of compressed air foam. Check valve(s) shall be provided to prevent foam contamination
of the fire pump and water tank or water contamination of the foam tank. All CAF capable
discharges shall have the discharge valve control, air injection control, and discharge pressure
gauge mounted in a group on the operator's panel.
2.10 Line voltage electrical system.
2.10.1 Auxiliary generator. A 10 kilowatt (KW) (continuous rating), 120/240 volt, 60 hertz,
generator shall be provided. The generator shall be activated from the driver's position and shall
have a monitor light to indicate operation. A governor shall regulate engine speed to match the
generator output to the connected load. Gauges shall monitor the operation of the generator
system and indicate the connected load. Access for maintenance shall be provided above the
generator. Individual circuit breaker tripping or failure shall not affect operation of other active
circuits. The generator shall interface with the Idle Reduction Technology system (see 2.10.6).
2.10.2 Electrical shoreline connection. The battery charger/conditioner shall be powered from a
covered, three wire, straight blade, polarized, insulated, labeled, recessed, 120 volt, NEMA 5-
15P male plug inlet, in a weatherproof AC auto-eject receptacle. The connection shall be located
on the exterior of the vehicle, either on the left side rear corner of the cab or within 6 inches of
the left side front corner of the body. A 50 foot long, three wire, 15 amp rated, 120 volt, AC
power cable, with straight blade (non twist-lock), NEMA 5-15R and 5-15P style, in accordance
with NEMA WD-6, connectors, shall be provided. To support the winterization system, as
specified in 2.1.1.2, two identical receptacles and cables shall be provided; the receptacles shall
be clearly marked. The winterization system shall have a labeled activation switch with a pilot
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