SECTION 4 1800-3000 USER MANUAL
55
• A few electrical checks should be made to
help assure that the first start-up will be
trouble-free.
1. Check incoming voltage. Be sure that the
compressor is wired for the correct incoming
voltage.
2. Check the motor starter for correct size,
properly sized overload relay, and correct
heaters for the load.
3. Check all electrical connections for tight-
ness. Check all grounding connection for
bond.
4. “DRY RUN” the electrical controls by discon-
necting the three (3) motor leads from the
starter. Energize the control circuits by
pressing the “ ” (START) pad, and check
all protective devices to be sure that they will
de-energize the starter coil when tripped.
5. Reconnect the motor leads and jog the
motor for a direction of rotation check as
explained in Section 4.7. Wiring diagram for
standard compressors is supplied with the
machine.
4.7 MOTOR ROTATION
DIRECTION CHECK
Motor rotation check must be made at compressor
startup. See Figure 4-2 and Figure 4-3. The
compressor will not operate correctly if it runs in the
wrong direction. Open the compressor door to view
the motor rotation. After the electrical wiring has
been done, it is necessary to check the direction of
the motor rotation. 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 for a very short time.
When looking at the motor from the end opposite the
compressor unit, the shaft should be turning
clockwise. If the reversed rotation is noted,
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 to show proper motor/compressor rotation.
An alternative to this procedure is to set the WS
Controller to display P1 separator/sump 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 for a very short time. If motor
rotation is correct there will be immediate pressure
shown. If no pressure is present, reverse rotation is
occurring. Disconnect the power to the starter and
exchange any two of the three power input leads.
Recheck rotation as outlined above.
4.8 FAN MOTOR ROTATION
CHECK
On initial start-up check that the fan is rotating in the
proper direction. The correct rotation is
counterclockwise when viewing the fan motor from
the driveshaft end.
DANGER
Lethal shock hazards exist inside. Discon-
nect all power at source and lock out before
opening or servicing.
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