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 TM 9-2320-279-10-3
Operation Under Unusual Conditions (Cont)
2-134. OPERATION IN COLD ENVIRONMENT, -25F TO 32F (-32C TO 0C)
(CONT).
b. Operating In Cold Weather.
CAUTION
If main water pump is in a "Wet" (flooded) condition
during cold weather operations, pump must be engaged
and re-circulating water to prevent freezing of pump and
plumbing. Failure to comply may result in damage to
equipment.
NOTE
Winterization package allows operation of water
pump, foam system and body to -25F (-32C) for a
period no longer than two hours. This package
includes two diesel fired 27,300 BTU heaters, one
inside pump compartment and one in rear
compartment. Heaters automatically turn on at
+39F (+/- 2F), (4C [+/-1C]), and turn off at 57F
(+/- 3F), (14C [+/-1C)].
Two 2,250W heaters are installed in onboard water
tank. Tank heaters automatically turn on at +40F
(4C) and turn off at +60F (16C) when main circuit
breakers (CB1 and CB3) and tank and pipe heater
circuit breakers (CB11, CB13, and CB15) are turned
ON and not tripped. Pump compartment is sealed to
reduce heat loss. Critical piping is also heated and
insulated.
(1)
Start vehicle engine (TM 9-2320-279-10-1, para 2-11).
(2)
Proceed to scene.
2-220
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