Waterous 500-100-P, Руководство по эксплуатации

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Waterous Arizona Operations 500-100 & 120-P Operations Rev 1
Page 6 of 30
2. Move Auto-Sync controls to the AUTO position.
Air pressure as shown on the air pressure gauge should rise to within plus or
minus 5% of the water discharge pressure. The Auto-Sync system will
balance the air and water pressures throughout a range of 40 PSI up to 150
PSI. Optimal compressed air foam system performance occurs at discharge
flow pressures of 80-120 PSI.
3. Set proportioner at 0.2% - 0.6% for normal Class A combustibles.
The type and brand of foam concentrate used and the tactical objective,
dictate proportioning rates.
4. Open desired discharge valve(s).
Controlling the amount of foam solution entering the discharge stream sets
the foam expansion ratio. High solution flows restrict the amount of air
admitted and result in lower expansion or “wet” foam. To produce higher
expansion or “drier” foam, simply gate back the amount of solution admitted.
5. Fully open the air valve(s) to the desired discharge(s).
6. Adjust the solution flow to produce the desired foam consistency.
Foam is formed during the transition through the hose. To produce acceptable
finished foam, sufficient hose length must be provided on the discharge. Refer to the
section “Suggested Guidelines for the Production of Mid-Range Compressed Air
Foam
”.
WARNING:
Nozzle reaction force is significantly increased at the time the nozzle valve is opened in
compressed air foam operations. OPEN CAFS NOZZLES SLOWLY!
IV. Compressed Air Only Operation
Follow instructions for water pumping operations without opening discharge valves.
Air compressor cooling is via water that is circulated by the fire pump through the
compressor cooler and returned back to the booster tank. During this operation, time
is limited by the amount of available cooling water.
The water in the booster tank will eventually become heat saturated and ineffective at
cooling the air compressor. Watch the compressor temperature gauge closely!
Maximum of 250°F. Compressor system overheat is also indicated by the panel
mounted warning light and alarm.
1. After PTO engagement, ensure that the water pressure as shown on the
panel mounted gauge rises.
2. Move Auto-Sync control to the FIXED position. Air pressure will rise to the
preset pressure setting on the air compressor, approximately 150-PSI with
the engine throttled-up.
3. For lower operating pressures, move the Auto-Sync controls to the AUTO
position and use the engine throttle to control the water pressure / air
pressure
4. Connect the air discharge hose
to the fitting on the pump operator’s panel
and open the air supply valve.