SECTION 4 4500P-7500 USER MANUAL
55
L2-L3 should be tight and clean.
The applied voltage must conform to the motor and
compressor data plate ratings.
A starter hole is provided for an incoming power
connection. If it is necessary to make a hole in the
control box in a different location, care should be
taken to not allow metal shavings to enter the starter
and other electrical components within the box. If
another hole is used, the original hole must be
blocked off with a sealed plug.
1. Check incoming voltage. The incoming
voltage must match the compressor’s wire
rating/specifications.
2. Check motor starter and overload heater
sizes.
3. Check all electrical connections for
tightness.
Figure 4-3: Incoming Power Location
4.7 MOTOR ROTATION
DIRECTION CHECK
Motor rotation check must be done at
compressor start-up after the wiring has been
installed. The compressor can be damaged if it
runs in the wrong direction for more than a few
seconds. Motor rotation can be viewed through
the opening in the drive adapter housing. Pull out
the EMERGENCY STOP button and press once,
quickly and in succession, the (START)
and (STOP) pads. This action will bump
start the motor. When looking at the motor from
the end opposite the compressor unit, the shaft
should turn clockwise. If reverse rotation occurs,
disconnect the power to the starter and
exchange any two of the three power input leads,
then re-check rotation. A "Direction of Rotation"
decal is located on the motor drive housing to
show proper motor/compressor rotation. An
alternative to this procedure is to set the WS
Controller to display P1 receiver tank pressure.
Pull out the EMERGENCY STOP button and
press once, quickly and in succession, the
(START) and (STOP) pads. This action will
bump start the motor. If motor rotation is correct
there will be an immediate pressure indication. If
no pressure is present, the motor is operating in
reverse. Disconnect the power to the starter and
exchange any two of the three power input leads
and recheck the rotation.
Fan motor rotation should also be checked. It
should rotate counter-clockwise when viewing
the fan motor from the backside of the motor.
WARNING
Energized internal components are a potentially
FATAL SHOCK HAZARD. Disconnect all power
before performing any work on the compressor’s
electrical system.
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