Mounting Of Compressor; Service Air Piping; Coupling Alignment Check; Fluid Level Check - Sullair 20/12 Series Operator's Manual And Parts List

4.1 MOUNTING OF COMPRESSOR

A foundation or mounting capable of supporting the
weight of the compressor, and rigid enough to main-
tain the compressor frame level and the compressor
in alignment is required. The compressor frame
must be leveled and secured with foundation bolts,
and full uniform contact must be maintained be-
tween the frame and foundation. No piping loads
shall be transmitted to the compressor at the exter-
nal connections.

4.2 SERVICE AIR PIPING

Service air piping should be installed as shown in
F igur e 4 -- 1. A s hut -- off v alv e s hould be ins t alled t o
isolate the compressor from the service line if re-
quired. Also notice that the service line should be
equipped with water legs and condensate drains
throughout the system.
Under certain conditions for inside installations,
it may be desirable to pipe the relief valves to the
outside of the building.

4.3 COUPLING ALIGNMENT CHECK

In preparation for the factory test, the coupling sup-
plied with your compressor is properly aligned for
operation. The motor is flange--mounted to the com-
pressor unit. Therefore it is not necessary to re-
check this alignment.

4.4 FLUID LEVEL CHECK

The 2--stage air compressor is also supplied with the
proper amount of fluid. However, it is necessary to
check the fluid level at installation. The level is
checked by looking at the sight glass located near
the sump. If the sump is properly filled, the fluid level
should be visible in the sight glass.

4.5 MOTOR ROTATION DIRECTION CHECK

After the electrical wiring has been done, it is neces-
sary to check the direction of the motor rotation. This
Figure 4-1 Service Air Piping
NOTE
can be done by jogging the START and STOP but-
tons on the instrument panel. 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 input leads, then re--check rotation.

4.6 ELECTRICAL PREPARATION

Interior electrical wiring is performed at the factory.
Required customer wiring is minimal, but should be
done be a qualified electrician in compliance with
OSHA, National Electrical Code, and any other ap-
plicable local electrical code concerning isolation
switches, fused disconnects, etc. Sullair provides a
wiring diagram for use by the installer.
A few electrical checks should be made to help as-
sure that the first start--up will be trouble free.
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 compres-
sor was wired for.
2. Check starter and overload heater sizes (see in-
strument panel and electric control box in Parts
List).
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 START
button and check all protective devices to be sure
that they will de--energize the starter coil when
activated.
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 4.
Section 4
INSTALLATION
DANGER
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5.
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