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TM 5-4210-230-14&P-1
WARNING
If the master pump gauge (1, Fig. 3) shows an excessive vacuum stop pumping and check suction strainer
for leaves, dirt, and other foreign material.
D.
Pumping foam using water from booster tank.
1.
Start engine (refer to section 1).
2.
Prime pump (refer to para 1).
3.
Connect the discharge hose and nozzle to the required discharge outlet, and open corresponding discharge
valve, or 1 1/2" crosslay.
4.
Open the water tank-to-pump valve (24, Fig. 3).
5.
Open the water-to-proportioner valve (23, fig. 3).
6.
Set the foam metering valve (36, Fig. 3) (if not already pre-set) at appropriate setting based on type of
extinguishing agent use. (see selection chart for correct setting based on use of double strength (3%) and
regular strength (6%) foam liquids).
7
the foam metering valve (if not already pre-set) at appropriate setting based on type of extinguishing agent
used.
8.
Increase engine speed as required using throttle (16, Fig. 3) on operator's control panel.
9.
Open foam-to-proportioner valve on operator's control panel (37, Fig. 3).
10. Open nozzle on end of discharge line and operate.
11. After use, flush the system with fresh water.
E.
Pumping foam from an open body of water.
1.
Start the engine.
2.
Connect the 2 1/2" hard suction hose to the pump panel or rear pump suction arm.
3.
Connect the discharge hose and nozzle to the required outlet, and open corresponding discharge valve, or
use booster hose.
4-5
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