Pierce Pumper, Руководство по эксплуатации и техническому обслуживанию

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© 2019 Pierce Manufacturing Inc. All Rights Reserved.
Pierce Pumper / 3-19
OPERATION
3. Open tank fill or recirculating valve.
The tank fill valve opens the connection from the discharge side of the pump to the water tank. Open the tank
fill valve to refill the water tank from a water source that is connected to an intake fitting.
With the tank-to-pump valve and the tank fill valve both OPEN, water recirculates from the tank, through the
pump, and back to the tank. This cools the pump before you begin flowing water to a discharge line.
ALWAYS crack open the tank fill valve when running the pump. If you fail to continuously circulate water through
the pump chamber, the water trapped in the pump chamber heats to boiling in seconds. Boiling water and steam
can injure people. It also damages pump seals and gaskets.
When recirculating water, the water in the tank will eventually become too hot to cool the pump. Exchange tank
water with fresh water to keep pump cooled.
Keep track of water temperature:
a. Touch the outlet pipe to see how warm it is. If it is hot to the touch, it is time to bring fresh, cool water into
the water tank or turn OFF pump.
b. Watch tank temperature gauge (if your fire department selected this option). When temperature reaches
175° F, then add fresh cool water or turn OFF pump.
4. Open recirculating valve (optional).
A dedicated recirculating valve opens a small water flow from the pump to the tank. The flow through this line
cools the pump. The recirculating line does not let water flow from the tank to the pump, so it works only if the
Tank to Pump valve is OPEN, or if the intake is supplied by a water source.
Keep pump water cool.
ALWAYS circulate fresh water through the pump.
Pump can heat trapped water to boiling in seconds.
Burst lines can spray personnel with scalding water.
Scalding water can injure or kill.
Do not exceed the specified inlet pressure and/or maximum fill rate.
Maximum Fill Rate = 1,000 GPM (3,800 LPM) or the tank’s capacity in GPM (LPM) (500 Gallon tank = 500
GPM) whichever is less.
Maximum inlet pressure for tank filling is 100 psi (7 bar).
Gate back flow into tank before reaching full level. Continue filling at a rate which allows excess water
to be completely evacuated by the overflow pipe. Do not allow water to spill from the tank fill tower.
Failure to comply may cause over-pressurization of the tank and tank failure, which may result in
severe personal injury or death.