Pierce Pumper, Руководство по эксплуатации и техническому обслуживанию

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Pierce Pumper / 3-31
OPERATION
Pump Pressure Control and Systems Monitoring
3-14. Pump Pressure Control
3-14.1 Engine Speed and Pump Pressure
The pump pressure is controlled by regulating the engine speed. If the apparatus is equipped with a pressure
governor, the governor will regulate the engine speed automatically to maintain the desired pump pressure.
3-14.2 Determining Discharge Pressure
The desired pump pressure is determined by:
•
Engine speed
• Pump size
• Discharge restriction (size and length of discharge hose)
• Intake restriction (size and length of intake hose)
• System restriction (size and shape of valves, fittings, manifolds, etc.)
You must determine a pump pressure that will provide the desired nozzle pressure, based on the number and size
of attack lines that are deployed.
Determine this pressure for all fire-fighting situations you might encounter, and record them on a pump chart. Keep
the pump chart in a location accessible to the pump operator.
Refer to the IFSTA
Pumping Apparatus Driver/Operator Handbook
(latest edition) for procedures on creating a pump
chart.
Hand Throttle Systems can malfunction.
If engine control is lost at pump panel, assign someone to use foot pedal in cab to continue pumping
operation.
Hoses and nozzles can explode if over-pressurized.
NEVER exceed pressure rating of downstream devices.
Exploding devices can injure or kill.
Keep control of hose under pressure.
Hose under pressure wants to fly about.
Flying hose can injure or kill.