Waterous 500-100-P Operation Manual
Also see for 500-100-P: Operation and maintenance instructions
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Contents
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Waterous Arizona Operations 500-100 & 120-P Operations Rev 1Page 6 of 302. Move Auto-Sync controls to the AUTO position.Air pressure as shown on the air pressure gauge should rise to within plus orminus 5% of the water discharge pressure. The Auto-Sync system willbalance the air and water pressures throughout a range of 40 PSI up to 150PSI. Optimal compressed air foam system performance occurs at dischargeflow 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 setsthe foam expansion ratio. High solution flows restrict the amount of airadmitted and result in lower expansion or “wet” foam. To produce higherexpansion 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 acceptablefinished foam, sufficient hose length must be provided on the discharge. Refer to thesection “Suggested Guidelines for the Production of Mid-Range Compressed AirFoam”.WARNING: Nozzle reaction force is significantly increased at the time the nozzle valve is opened incompressed air foam operations. OPEN CAFS NOZZLES SLOWLY!IV. Compressed Air Only OperationFollow instructions for water pumping operations without opening discharge valves.Air compressor cooling is via water that is circulated by the fire pump through thecompressor cooler and returned back to the booster tank. During this operation, timeis limited by the amount of available cooling water.The water in the booster tank will eventually become heat saturated and ineffective atcooling the air compressor. Watch the compressor temperature gauge closely!Maximum of 250°F. Compressor system overheat is also indicated by the panelmounted warning light and alarm.1. After PTO engagement, ensure that the water pressure as shown on thepanel mounted gauge rises.2. Move Auto-Sync control to the FIXED position. Air pressure will rise to thepreset pressure setting on the air compressor, approximately 150-PSI withthe engine throttled-up.3. For lower operating pressures, move the Auto-Sync controls to the AUTOposition and use the engine throttle to control the water pressure / airpressure4. Connect the air discharge hose to the fitting on the pump operator’s paneland open the air supply valve. |
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