Hale 80FC User Manual
Page 48
❑ Operation
48
Pump Ends
p/n: 029-0020-61-0
8.
Activate the priming pump - pull the control handle, or press the pushbutton.
Your departmental manual for pumping should specify the correct RPM for
priming. However, in general, priming should be operated at IDLE.
Running the engine at speeds higher than 1,200 RPM during priming is not
recommended. It does not improve the priming operation but can cause
damage to the pump.
CAUTION !
IF THE DISCHARGE GAUGE READING DOES NOT INCREASE, THE INTAKE
GAUGE READING DOES NOT FALL BELOW ZERO (0), OR THE PRIMING PUMP
DOES NOT DISCHARGE WATER TO THE GROUND WITHIN 30 TO 45 SECONDS,
DO NOT CONTINUE TO RUN THE PRIMING PUMP.
STOP THE PUMP AND CHECK FOR AIR LEAKS OR POSSIBLE PROBLEMS. SEE
SECTION 5 “TROUBLESHOOTING,” ON PAGE 71.
9.
When operating from a positive pressure source (e.g. hydrant or relay),
make sure any air is purged from the hose and pump.
CAUTION !
WHEN OPERATING FROM A POSITIVE PRESSURE SOURCE WITH A SOFT SUP-
PLY HOSE, DO NOT DRAW RESIDUAL PRESSURE BELOW 5 PSI (0.4 BAR) OR
YOUR DEPARTMENTAL LIMITS. DAMAGE TO THE HYDRANT, HOSE AND POS-
SIBLY THE PUMP MAY RESULT.
10.
Monitor the intake and discharge master gauges. When the pump is
primed, the intake reading falls below zero (0), and the discharge pressure
starts to increase. You may also hear water splashing on the ground, indi-
cating the pump is primed.
11.
Gradually open the discharge valve until water emerges in a steady stream.
Then open the other discharge valves to the desired setting.
12.
Gradually open the engine throttle until the desired pressure or flow is
achieved.
As the throttle is opened, the pressure gauge reading increases with the
engine speed. If the engine speed increases without an increase in pres-
sure, the pump may be cavitating.