Sullair ShopTek ST1100 User Manual Download

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SECTION 4

HOP

™

USER MANUAL

02250180-090 R00

during compressor operation. Check the fluid level by
looking at the sight glass on the separator tube when
the compressor is in the SHUT DOWN MODE (fluid
level may not be visible when operating). In this
condition the sight glass should be completely full.
Add fluid if the level is visible or if no fluid is visible at
all.

4.6

ELECTRICAL PREPARATION

Interior electrical wiring is installed at the factory.

Required customer wiring should be done by a

qualified electrician in compliance with OSHA,

National Electric Code and/or any applicable local

electrical codes applying to isolation switches, fused

disconnects, etc. Refer to

Figure 3-2

an d

Figure 3-4

Sullair provides a wiring diagram for use by the

installer. An electrical check should be made to

ensure that the first start-up will be successful. The

compressor and drive should be properly grounded/

earthed in accordance with applicable codes,

regulations, and requirements.

Feeder cables should be sized by the customer/

electrical contractor to ensure that the circuit is

balanced and not overloaded by other electrical

equipment. The length of wiring from a suitable

electrical power source is critical because voltage

drops can adversely effect the performance of the

compressor. Cable sizes may vary considerably so
the mains terminals will accept up to 120 mm

(4/0

awg) (75kw) cable.
Feeder cable connections to incoming terminals L1-
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.

4.7

MOTOR ROTATION

DIRECTION CHECK

Motor rotation check must be done at compressor
start-up after the wiring has been installed. See

Figure 4-4

and

Figure 4-5

. 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 openings in the belt guard. Pull out the
EMERGENCY STOP button and press once, quickly
and in succession, the

(START) pad and

(STOP) pad. This action will bump start the motor.
When looking at the motor from the compressor unit,
the shaft should turn clockwise for ST400, ST500
and ST700 and counterclockwise for ST1100 and
ST1500. 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.

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 poten-
tially FATAL SHOCK HAZARD. Disconnect
all power before performing any work on the
compressor’s electrical system.