Gorman-Rupp Pumps PA6C60C-B-E50 460/3 1528569 and up - Manual (Page 15)

PA SERIES OM-06531
PAGE B - 7 INSTALLATION
available at the pump motor must be within the in­
dicated range.
Table 1. Pump Motor Voltage Limits
Nominal
Voltage Minimum
Voltage Maximum
Voltage
Phase
460 3 414 506
575 3 517 632
If the voltage is not within the recommended limits,
obtain the services of a qualified electrician to de­
termine the correct field wiring size and other de­
tails to ensure an adequate voltage supply.
Make certain all connections are tight and that ca­
ble entry points are rainproof. Support the cable
weight, if required, to prevent excessive strain on
cable clamps and cable.
NOTE
After the power cables have been connected to the
control box, make certain the connection is water­
proof.
Voltage Imbalance
Each phase of the incoming three‐phase power
must be balanced with the other two as accurately
as a commercial voltmeter will read. If the phases
are out of balance, contact your power company
and request that they correct the condition.
Power Cable Connections
The electrical power used to operate the
control box is high enough to cause in­
jury or death. Obtain the services of a
qualified electrician to make all electri­
cal connections. Make certain that in­
coming power to the control box is in the
off position and locked out, or that the
power supply to the control box has
been otherwise cut off and locked out,
before connecting power or accessory
cables.
When necessary to change or connect power
cables to the control box, make certain the incom­
ing power is OFF and LOCKED OUT. Make certain
the control box is properly grounded and that the
electrical data on the control matches the pump
motor name plate data.
Connect the power cable to the control box as
shown in the wiring diagrams in this section or in­
side the control box door. Use conduit or cable
clamps to secure the power and accessory cables
to the control box. Make certain that all connec­
tions are tight and that cable entry points are
rainproof.
Control Box Adjustments
For control adjustments and settings, refer to the
information inside the control box door.
To maintain overcurrent, short circuit
and ground fault protection, the man­
ufacturer's instructions for selection of
the heater pack and setting of the in­
stantaneous trip circuit breaker (current
interrupter) or control interface module
must be followed. Failure to follow these
instructions can result in damage to the
pump and/or serious injury to person­
nel.
ALIGNMENT
The alignment of the pump and motor is critical for
trouble‐free mechanical operation. In a flexible
coupling system, the driver and pump must be
mounted so that their shafts are aligned with and
parallel to each other. It is imperative that alignment
be checked after the pump and piping are in­
stalled, and before operation.
NOTE
Check Rotation, Section C, before final alignment
of the pump.
When mounted at the Gorman‐Rupp factory, driver
and pump are aligned before shipment. Misalign­
ment will occur in transit and handling. Pumps
must be checked and realigned before operation.