Sullair ShopTek ST18, Operation & Maintenance Manual, Page: 27 / 76

ST18 & ST22 (U.S.A. & Mexico) Operation & Maintenance Manual 4: Installation & Setup
88291013-137 R05
Subject to EAR, ECCN EAR99 and related export control restrictions. 21
4.5.2.1 Checking the air end of a new machine
Rotate the flexible drive coupling by hand through two
complete revolutions in the direction indicated by the
arrows located on the air end and motor.
4.5.3 Checking the compressor fluid level
Open the front access panel just enough to view the sight
glass located on the separator tank, then follow the
instructions in
Section 6.3.6: Compressor fluid levels
on
page 29 for how to check the compressor’s fluid level.
• If the fluid level is below the minimum fluid
level, see
Section 6.4.1: Adding compressor
fluid
on page 29.
4.5.4 Checking the isolation gate valve
If an isolation gate valve is installed in your air system,
make sure the valve is open.
4.6 Electrical checks
When performing any electrical work, refer to the electri-
cal diagram supplied with your compressor.
All the compressor’s internal wiring is factory fitted and
tested. The required connection wiring is minimal, but it
must be performed by a licensed electrician. A licensed
electrician must also review the electrical system to see
that it is adequate for starting and running the compres-
sor.
4.6.1 Power supply requirements
• Depending on the electrical frequency and volt-
age in your region, your power supply will be
either:
• 460 VAC, 3-phase, 60 Hz with ground
• 230 VAC, 3-phase, 60 Hz with ground
(requires conversion)
• Control voltage: 110 VAC
4.6.2 Checking the motor rotation direction
For the motor to rotate in the correct direction, the power
supply must be correctly connected.
You should check the rotation of the motor before starting
up the compressor for use. Before checking the motor
rotation direction, you
must
familiarize yourself with
Sec-
tion 5: Operation
.
1. Pull out emergency stop (E-stop) button from
the monitor’s control panel.
2. Press the Start button.
• If the phase sequence is wrong, a com-
pressor with a phase sequence protector
will not start and the controller will display
an error message.
3.
Immediately
press the E-Stop button.
• This will cause the motor and air end to
rotate momentarily, but not long enough to
damage the air end if the motor rotation
direction is reversed.
4. Check that the motor and air end rotate in
the direction indicated by the arrows on the
air end to motor drive coupling.
• If the motor and air end do not rotate in the
direction indicated by the arrows, the
incoming mains power leads need to be
reversed by a licensed electrician.
• Do not reverse any motor or starter wir-
ing. This wiring must not be modified.
WARNING
Never run the motor with the rotation direction
reversed!
Motor rotation in the wrong direction can dam-
age the air end and may void your warranty.