Gorman-Rupp Pumps 86A2-F4L 1322538 and up - Manual (Page 14)

OM-00957 80 SERIES
OPERATION PAGE C - 2
liquid until the casing is filled. Replace the fill cover
or fill plug before operating the pump.
STARTING
If the pump is equipped with the option­
al automatic starting system, it is sub­
ject to automatic restart. Keep hands
and clothing away from the unit to pre­
vent injury during automatic operation.
Disconnect the positive battery cable
before performing any maintenance.
Failure to do so may result in serious
personal injury.
Consult the operations manual furnished with the
engine.
Starting
On initial start‐up, set the engine speed at the half‐
throttle position. Turn the keyswitch on the control
box to the “START” position until the engine starts.
Release the key and the switch will return to the
“RUN” position.
After the engine starts and the unit is fully primed,
adjust the engine RPM until the desired flow rate is
achieved.
Pump speed and operating condition
points must be within the continuous per­
formance range shown on the curve on
page E‐1.
OPERATION
Pump speed and operating condition
points must be within the continuous per­
formance range shown on the curve. (See
Section E, Page 1.)
Lines With a Bypass
If a Gorman‐Rupp Automatic Air Release Valve has
been installed, the valve will automatically open to
allow the pump to prime, and automatically close
after priming is complete (see INSTALLATION for
Air Release Valve operation).
If the bypass line is open, air from the suction line
will be discharged through the bypass line back to
the wet well during the priming cycle. Liquid will
then continue to circulate through the bypass line
while the pump is in operation.
Lines Without a Bypass
Open all valves in the discharge line and start the
power source. Priming is indicated by a positive
reading on the discharge pressure gauge or by a
quieter operation. The pump may not prime imme­
diately because the suction line must first fill with
liquid. If the pump fails to prime within five minutes,
stop it and check the suction line for leaks.
After the pump has been primed, partially close the
discharge line throttling valve in order to fill the line
slowly and guard against excessive shock pres­
sure which could damage pipe ends, gaskets,
sprinkler heads, and any other fixtures connected
to the line. When the discharge line is completely
filled, adjust the throttling valve to the required flow
rate.
Do not operate the pump against a
closed discharge throttling valve for
long periods of time. If operated against
a closed discharge throttling valve,
pump components will deteriorate, and
the liquid could come to a boil, build
pressure, and cause the pump casing to
rupture or explode.
Leakage
No leakage should be visible at pump mating sur­
faces, or at pump connections or fittings. Keep all