Hale RSD - Manual (Page 30)

❑ Operation
30 Section 3: Operating
Hale Products, Inc., Nov.2005, Rev-A
7. Open the hydrant. Bleed off the air from the suction hose.
8. Open the suction valve to allow water flow into the pump.
9. To eliminate air pockets, open the appropriate valve to expel air or prime the
pump, if so equipped. Also see heading “Pumping From Draft” on page 31.
10. Note the discharge and intake pressures as applicable, then open the
engine throttle gradually until the master discharge gauge indicates the
desired pressure.
11. Set the automatic relief valve according to your fire department policy, if so
equipped. If your fire department does not have a policy, see heading “TPM
Operation from a Hydrant” on page 31.
CAUTION !
DO NOT REDUCE THE PRESSURE ON THE INTAKE GAUGE BELOW DEPART-
MENT LIMITS. SERIOUS DAMAGE TO THE WATER MAIN COULD RESULT.
12. If the master intake gauge shows a vacuum before the desired discharge
pressure or flow is achieved, it indicates that you are receiving all the water
that the suction piping (hydrant) can supply.
13. If you need to increase pressure when this occurs, pump flow must be
reduced or the water supply improved.
To increase the pressure, reduce the pump flow. However, the master intake
gauge reading must be maintained at 5 PSI (0.34 BAR), minimum.
14. As the throttle (engine speed) is increased, the pressure gauge reading
increases.
15. Close the throttle slowly until the pressure begins to stabilize and track with
engine speed. If this does not correct the problem, you may be trying to
pump more capacity than is available from the supply. Also check the inlet
strainers for possible debris restricting the flow.
16. Open the discharge valves.
IMPORTANT !
IF THE PUMP OVERHEATS AND IS NOT EQUIPPED WITH THE HALE TRV VALVE,
OPEN THE VALVE TO ACCESS THE PUMP AUXILIARY COOLING SYSTEM, OR
SLIGHTLY OPEN THE TANK FILL LINE TO CIRCULATE WATER.