Section 2
INSTALLATION
6
2. Check starter for correct size, proper overload
relay, and heaters.
3. Check all electrical connections for tightness.
4. “DRY RUN” the electrical controls by disconnect-
ing the three (3) motor leads from the starter. En-
ergize the control circuits by turning the “O/I”
STOP/START switch to “I” START and check all
protective devices to be sure that they will de--en-
ergize the starter coil when tripped.
5. Reconnect the motor leads and jog the motor for
a dir ec t ion of r ot at ion c hec k as ex plained in S ec -
t ion 2. 7.
NOTE
Wiring diagram for standard compressors is sup-
plied on the inside cover of the Control Center.
Optional compressor wiring diagrams will vary.
2.6 ELECTRICAL PREPARATION- SUPERVISOR II
Interior electrical wiring is performed at the factory.
Customer wiring is minimal, but should be done by a
qualified electrician in compliance with OSHA, Na-
tional Electric Code and/or any applicable local elec-
trical code concerning isolation switches, fused dis-
connects, etc. Sullair provides a wiring diagram for
use by the installer.
DANGER
!
Lethal shock hazard inside.
Disconnect all power at source, before opening or
servicing.
1. Check incoming electrical power. Be sure that the
incoming voltage matches the compressor volt-
age.
2. Check starter and overload heater sizes.
3. Check all electrical connections for tightness.
4. “DRY RUN” the electrical controls by disconnect-
ing the three (3) motor leads from the starter. En-
ergize the control circuits by pushing the “I”
(START) pad and check all protective devices to
be sure that they will de--energize the starter coil
when tripped.
5. Reconnect the three (3) motor leads and jog the
motor for a direction of rotation check, as ex-
plained in S ec t ion 2. 8.
2.7 MOTOR ROTATION DIRECTION CHECK- STAN-
DARD ELECTRO/MECHANICAL
NOTE
Motor rotation check must be made at compressor
start--up. Remove rear compressor grill panel to
view motor rotation.
After the electrical wiring has been completed, it is
necessary to check the direction of the motor rota-
tion. This can be done by toggling the “I” (START)
and “O” (STOP) positions of the rotary switch on
the control box door. When looking at the motor from
the end opposite the compressor unit, the shaft
should be turning clockwise. If the motor shaft is not
turning clockwise, disconnect the power to the start-
er and exchange any two of the three power input
leads, then re--check rotation. A “Direction of Rota-
tion” decal is located on the motor to show proper
motor/compressor rotation.
An electrical check should be made to help assure
that the first start--up will be trouble free.
An alternative to this procedure is to monitor the
sump pressure gauge when toggling the “I”
(START) switch. If immediate pressure is shown on
the sump pressure gauge when the compressor is
started, then, the proper motor rotation has been
achieved. If no pressure is indicated, turn switch to
the “O” (STOP) position immediately. This indi-
cates improper motor rotation. Disconnect the pow-
er to the starter and exchange any two of the three
power input leads. Recheck rotation as outlined
above.
2.8 MOTOR ROTATION DIRECTION CHECK- SU-
PERVISOR II
NOTE
Motor rotation check must be made at compressor
start--up. Remove rear compressor grill panel to
view motor rotation.
After the electrical wiring has been completed, it is
necessary to check the direction of the motor rota-
tion.
Pull out the EMERGENCY STOP button--reset and
press once, quickly and in succession, the “I”
(START) and “O” (STOP) pads. This action will
bump start the motor for a very short time. When
looking at the motor from the end opposite the com-
pressor 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 “Direc-
tion of Rotation” decal is located on the motor to
show proper motor/compressor rotation.
An alternative to this procedure is to set the Supervi-
sor to display P1. Pull out the EMERGENCY STOP
button and press once, quickly and in succession,
the “I” (START) and “O” (STOP) pads. This action
will bump start the motor for a very short time. If mo-
tor rotation is correct there will be immediate pres-
sure shown. If no pressure is present, reverse rota-
tion is occurring. Disconnect the power to the starter
and exchange any two of the three power input
leads. Recheck rotation as outlined above.
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