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TM 5-4210-230-14&P-1
4.
Prime pump.
5.
Close the water tank-to-pump valve on operator's control panel (24, Fig. 3).
6.
Open the water-to proportioner valve on operator's control panel (23, Fig. 3).
7.
Set the foam metering valve (if not already pre-set) at appropriate setting based on type of extinguishing
agent used (36, Fig. 3).
8.
Increase engine speed as required using throttle on operator's control panel (16, Fig. 3)
9.
Open foam-to-proportioner valve (37, Fig. 3)
10. Open nozzle on end of discharge line and operate.
11 DRAINING AND FLUSHING DETAILS
A.
Draining and flushing the 30 gallon foam concentrate tank.
1.
Close the foam-to-proportioner (37, Fig. 3)
2.
With a hose, run a sufficient amount of water through the tank to flush the remaining foam concentrate from
the tank.
3.
Close the foam tank drain valve (12, Fig. 3).
WARNING
After each operation of the system refill foam tank. It is highly desirable to keep the liquid level of the tank
at the top of the tank. Experience has shown that the possibility of foam contamination may occur in the
vapor space above the liquid level.
B.
Draining the 300 gallon water tank and flushing the discharge line system.
1.
Open the drain valve (11, Fig. 3) located below the vehicle left running board to drain the 300 gallon water
tank.
4-6
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