Heat Rejection And Ventilation Requirements; Poorly Ventilated Areas; Additional Considerations For Multiple Compressor Installations; Ventilation And Existing High Ambient Temperature - Sullair ShopTek ST45 Operation & Maintenance Manual

4: Installation
4.3.2 Heat rejection and ventilation
requirements
The compressor rejects a considerable amount of heat,
so you must install it in a well-ventilated area.
Hot air from the cooling air discharge must not recirculate
into the cooling air inlet. This recirculation can be caused
by installing the compressor in a room with a low ceiling
or in a location where the cooling air is discharged past
the compressor's cooling air inlet. In these situations, you
should follow the guidelines in Section 4.3.2.1: Poorly
ventilated areas.
IMPORTANT
Do not install the compressor in an area where
exhaust fumes or other toxic, noxious, or corro-
sive fumes, chemicals, or substances can be
drawn into the air inlet.

4.3.2.1 Poorly ventilated areas

In a poorly ventilated area, the heated cooling air dis-
charged from the compressor can cause the ambient
temperature to rise above 40°C (104°F), which will cause
the compressor to overheat. Sullair recommends adding
ductwork to route the cooling air discharge away from the
compressor, possibly to another area or room. Any
ductwork added (including the outlet grill) should not
cause a pressure drop greater than 30 Pa (.004 psi)
(contact Sullair Aftermarket prior to installation) and must
not apply any weight to the compressor cabinet. Sullair
also recommends a section of the ductwork be remov-
able to allow easy access for servicing.
4.3.2.2 Additional considerations for multiple
compressor installations
In a multiple compressor installation, the air discharged
from one compressor must never flow into the intake of
another compressor.
4.3.2.3 Ventilation and existing high ambient
temperature
If the compressor is in a location where existing environ-
mental conditions will cause the ambient temperature to
exceed 40°C (104°F) even if the cooling air is adequately
dissipated (for example, in a boiler room), Sullair recom-
mends following the guidelines in Section 4.3.2.1: Poorly
ventilated areas.
26
ShopTek™ ST45, ST55, ST75 (U.S.A. & Mexico) Operation & Maintenance Manual
Subject to EAR, ECCN EAR99 and related export control restrictions.

4.4 Connection to the air system

Sullair recommends installing an isolation gate valve
immediately after the service connector to make installa-
tion, service, and removal of the compressor easier.
You must install a flexible connection between the
compressor and the external pipe work. Because the
internal components of the compressor are mounted on
anti-vibration pads and are not rigidly supported, no load
should ever be transferred to the service connector of the
compressor.
WARRANTY INFORMATION
Failure to install a flexible connection may result
in damage to the compressor and void your war-
ranty.
The plant air line should have an internal diameter at
least the size of the service connector (for service con-
nector size, see Section 3.1: Machine specifications on
page 21). For longer pipe runs, the pipe sizes should be
increased by one size to minimize pressure drop. Con-
densate from the pipe work should never flow towards
the compressor. One way of achieving this is to install
mains pipe work adjacent to the compressor and below
the service connector.
Additional information
• For the exact location of the service connector,
see the compressor's ID drawing.

4.5 Mechanical checks

Ensure that the compressor is electrically iso-
lated before performing any mechanical checks.
4.5.1 Checking the motor to air end
coupling
Ensure that the flexible drive coupling connecting the
motor and air end is correctly fastened.
4.5.2

Checking the air end

Before a new machine is started for the first time, you
must check that the air end is not hydraulically locked.
88292021-240 R01
WARNING