Section 4
INSTALLATION
19
5. Reconnect the motor leads and jog the motor for
a direction of rotation check as explained in Sec-
tion 4.8.
NOTE
Wiring diagram for standard compressors is sup-
plied on the in side cover of the Con trol C e nter.
Optional compressor wiring diagrams will vary.
4.7 ELECTRICAL PREPARATION--SUPERVISOR II
Interior electrical wiring is performed at t he factory.
Required customer wiring is minimal, but should
be done by a qualified electrician in compliance
with OSHA, National Electric Code and/or any ap-
plicable local electrical code concerning isolation
switches, fused disconnects, etc. Sullair provides a
wiring diagram for use by the installer.
An electrical check should be made to help assure
that the first start---up will be trouble---free.
DANGER
!
Lethal shock hazard inside. Disconnect all power
at source, before opening or servicing.
1. Check incoming voltage. Be sure that the incom-
ing voltage is the same voltage that the com-
pressor was w ired for.
2. Check starter and overload heater sizes.
3. Check all electrical connections for tightness.
4. “DRY RUN” the electrical controls by discon-
necting t he three (3) motor leads from the start-
er. Energize the control circuits by pushing the
“I” (START) pad and check all protective de-
vices t o 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 Section 4.9.
4.8 MOTOR ROTATION DIRECTION CHECK --
STANDARD ELECTRO/MECHANICAL
NOTE
Motor rotation check must be made at compressor
start---up. Remove compr essor panel as needed to
view motor rotation.
After t he electrical wiring has been done, it is nec-
essary to check the direction of the motor rotation.
Thiscanbedonebytogglingthe“I” (ST ART) 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
starter and exchange any two of the three power in-
put 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 monitor the
sump pressure gauge w hen toggling the “I”
(START) switch. I f immediate pressure is shown
on the sump pressure gauge when the compres-
sor is started, then the proper motor rotation has
been achieved. If no pressure is indicated, turn
switch to the “O” (STOP) position immediately.
This indicates improper motor rotation. Discon-
nect the power to the starter and exchange any two
of the t hree power input leads. Recheck rotation as
outlined above.
4.9 MOTOR ROTATION DIRECTION CHECK --
SUPERVISOR II
NOTE
Motor rotation check must be made at compressor
start---up. Remove compr essor panel as needed to
view motor rotation.
After t he electrical wiring has been done, it is nec-
essary to check the direction of the motor rotation.
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. When looking at the
motor from the end opposite the compressor unit,
the shaft should be turning clockwise. If the re-
versed rotation is noted, disconnect the power to
the starter and exchange any tw o of the three pow -
er input leads, t hen 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 Super-
visor to display P1. Pull out the EMERGENCY
STOP button and press once, quickly and in suc-
cession, the “I” (START) and “O” (STOP) pads.
This action will bump start the motor for a very short
time. If motor rotation is correct there will be imme-
diate pressure shown. If no pressure is present, re -
verse rotation is occurring. Disconnect the power
to the starter and exchange any two of the three
power imput leads. Recheck rotation as outlined
above.
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