Section 4
INSTALLATION
29
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 compres-
sor alignment is required. The compressor frame
must be leveled and secured with foundation bolts,
and full uniform contact must be maintained
between the frame and foundation. No piping loads
shall be transmitted to the compressor at the exter-
nal connections.
4.2 VENTILATION AND COOLING
For air-cooled compressors, select a location to
permit a sufficient unobstructed flow of air through
the compressor to keep the operating temperature
stable. The minimum distance that the compressor
should be from surrounding walls is three (3) feet
(1m). To prevent excessive ambient temperature
rise, it is imperative to provide adequate ventilation.
If ductwork is attached to cooler air discharge, the
high static fan option should be selected.
For water-cooled compressors, it is necessary to
check the cooling water supply. The water system
must be capable of supplying the flows listed in
Table 4-1 Water Supply Flow.
Table 4-2 Ventilation Requirements indicates the
ventilation requirements necessary to keep the
compressor running at a normal operating temper-
ature. The fan air requirement is the volume of air
which must flow through the compressor for proper
ventilation. The specified heat rejection requirement
is the amount of heat that is radiated by the com-
pressor. This heat must be removed to assure a
normal operating temperature. With air-cooled com-
pressors it is possible to use this heat for space
heating, providing no additional pressure drop is
created across the fan. Consult a Sullair represen-
tative for assistance in utilizing this heat.
4.3 SERVICE AIR PIPING
Service air piping should be installed as shown in
Figure 4-1. A shut-off valve should be installed to
isolate the compressor from the service line if
required. Also notice that the service line should be
equipped with water legs and condensate drains
throughout the system.
4.4 COUPLING ALIGNMENT CHECK
The compressor unit and motor are rigidly connect-
ed via a cast adapter piece which maintains the
shaft coupling in proper alignment. It is recom-
mended that prior to initial startup, all coupling fas-
teners are checked for proper tensioning. Refer to
the Coupling Service Procedures included in the
Maintenance section of this manual.
4.5 FLUID LEVEL CHECK
The 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
Table 4-1 Water Supply Flow (I)
WATER TEMP. WATER FLOW
ºF/ ºC GPM/ LPM
125HP/90KW 150HP/110KW
70/ 21 18/ 68 22/ 83
80/ 27 25/ 95 30/ 114
(I) Recommended water pressure range is 25 to 75
psig (1.7 to 5.2 bar).
Table 4-2 Ventilation Requirements
Cooling Type Air-cooled Water-cooled
Motor HP 125 150 125 150
Fan Air CFM 16,400 16,400 2,845 (I) 2,845 (I)
Heat Rejection to ventilating
air BTU/min. 6,081 7,527 1,340 1,340
Heat Rejection to water, BTU/min. 6,081 7,527
(I) Applies to compressors with canopy only (vent fan).
“The Plastic Pipe Institute recommends against
the use of thermoplastic pipe to transport com-
pressed air or other compressed gases in
exposed above ground locations, e.g. in exposed
plant piping.” (I)
PVC piping should not be used with Sullube. It
may affect the bond at cemented joints. Certain
other plastic materials may also be affected.
(I) Plastic Pipe Institute, Recommendation B,
Adopted January 19, 1972.
DO NOT install a water-cooled or an air-
cooled/aftercooled compressor where it will be
exposed to temperatures less than 32ºF/0ºC.
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