Gorman-Rupp Pumps PAV3C60C-B-E10 575/3 All serial numbers - Manual (Page 21)

OM-06502 PA SERIES
OPERATION PAGE C - 2
the relay to cool after tripping before press­
ing the reset.
If replacing the heater pack, press the reset
button to set the relay.
NOTE
If the circuit breaker trips, do not reset it immedi­
ately. Wait at least ten minutes before resetting the
control handle back to the ON position. If the over­
load unit continues to trip, operational problems ex­
ist.
The pump motor will restart as soon as
the RESET pushbutton is pressed, un­
less the selector switch is in the OFF po­
sition. Turn the selector switch to OFF
and move the control handle to OFF be­
fore approaching the pump.
D The optional liquid level system operates in
conjunction with the 3‐position switch
(HAND‐OFF‐AUTO) on the control box. After
the float(s) have been installed as described
in INSTALLATION, Section B, pump opera­
tion may be automatically controlled for fill­
ing or dewatering functions.
D The green run light indicates the pump is
running. The light will be energized when
the 3‐position switch is in the HAND position
or when the pump is running with the switch
in the AUTO position.
Always terminate incoming power to the control
box before investigating control box circuitry prob­
lems.
Always terminate power to the control
box before performing service func­
tions.
Power through the control box may be terminated
by moving the control handle to the OFF position,
thereby opening the circuit breakers. This stops
the pump, but does not terminate incoming power
through the field wiring connected to the control
box.
Rotation
The correct direction of pump rotation is indicated
by an arrow on the pump body or accompanying
decals. If the pump is operated in the wrong direc­
tion, the impeller could become loosened from the
shaft and seriously damage the pump.
The pump must operate in the direction in­
dicated by the arrow on the pump, or ac­
companying decals. Reverse rotation
could damage the pump and adversely af­
fect performance.
Disconnect the pump from the motor before
checking motor rotation. To check rotation, oper­
ate the motor independently while observing the
direction of the motor shaft, or cooling fan.
If rotation is incorrect, have a qualified electrician
interchange any two of the three phase wires at the
line connection to change direction.
Priming
The pump will begin to prime upon startup. The air
in the suction line will be discharged from the prim­
ing chamber discharge line. Complete priming is
indicated by a positive discharge pressure read­
ing.
If full priming is not achieved, the discharge check
valve may be malfunctioning. If this occurs, shut
down the pump and consult the Maintenance and
Repair section of this manual for further details.
Leakage
Once the pump is fully primed, no leakage should
be visible at pump mating surfaces, or at pump
connections or fittings. Keep all line connections
and fittings tight to maintain maximum pump effi­
ciency.