Gorman-Rupp Pumps SE1 1/2A3 115V 1P 1483930 and up - Manual (Page 17)

SE SERIES OM−06488
PAGE C − 2 OPERATION
PUMP OPERATION
Liquid Temperature and Overheating.
Do not start the pump more than 6 times
per hour. If the motor does not cool be-
tween starts it will overheat, resulting in
damage to the motor windings.
The maximum liquid temperature for this pump is
120
_F (490_C). Do not apply it at a higher operat-
ing temperature.
Overheating can occur if the pump is made to start
and stop repeatedly without time to cool off be-
tween starts, the liquid level is allowed to fall too
low to sufficiently cool the motor, or if the circuit
breaker or fuse fails to provide adequate protec-
tion. Operating the pump against a closed dis-
charge valve for an extended period will also cause
the pump to overheat.
Approach the pump cautiously after it
has been running. Although the motor is
cooled by the liquid being pumped, nor-
mal operating temperatures can be high
enough to cause burns. The tempera-
ture will be especially high if operated
against a closed discharge valve. Never
operate against a closed discharge
valve for long periods of time.
If overheating does occur, stop the pump immedi-
ately and allow it to completely cool before servic-
ing it. Approach any overheated pump cautious-
ly.
Overheated pumps can cause severe
burns and injuries. If overheating of the
pump occurs:
1. Stop the pump immediately.
Switch off the power at the control
box and lock it out to ensure that
the pump will remain inoperative.
2. Ventilate the area.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature before ser-
vicing.
5. Close the discharge valve (if
used).
6. Vent the pump slowly and cau-
tiously
7. Refer to instructions in this manual
before restarting the pump.
Impeller Rotation
Check impeller rotation as follows before operation
to ensure that the impeller is rotating in the correct
direction.
While checking impeller rotation, secure
the pump to prevent the power cable from
coiling.
Suspend the pump from the lifting device fitted on
the pump.
As viewed from the top, the pump should kick in a
counterclockwise direction; this will indicate that
impeller rotation is correct.
If the pump kicks in a clockwise direction, impeller
rotation is incorrect and the pump must be re-
turned to the factory or a Gorman-Rupp authorized
Submersible Repair Center. Since the pump is
powered by a single-phase motor, the direction of