WDM NE Series, Operation Manual

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NE Pumps.
11
•
Perform an insulation (or megger) test on the motor before
putting the pump into service.
•
Resistance values (ohms), voltage, and current (amps)
should all be recorded and saved for future reference.
Motor rotation.
Before checking motor rotation, make sure all components in the
system are wired and properly connected. If so then check the motor
rotation as follows.
If a 3 phase unit (only) – energize the motor briefly to make sure the
rotation is going in the direction indicated by the arrow in the pump
volute. If the rotation is not following the arrow, then switch the two
wires from the motor starter’s terminal.
Pump should be lowered into sump or basin, you can use NE lift rail
system sold separately to do so.
CAUTION.
To check the driver rotation, make sure pump and driver
couplings are fully disconnected and separated physically. Serious
damage will occur to both the pump and driver if the rotation is wrong.
CAUTION.
As pumps should not be operated while dry, be extremely
cautious in making sure the motor is energized only momentarily, just
long enough to determine if the rotation is proper.