2: Description
ShopTek™ ST45, ST55, ST75 (U.S.A. & Mexico) Operation & Maintenance Manual
88292021-240 R01
20
Subject to EAR, ECCN EAR99 and related export control restrictions.
After hitting the wall of the separator tank, the com-
pressed air/fluid mixture then flows through the separator
element. The separator element removes fine fluid parti-
cles. These particles accumulate at the bottom of the ele-
ment and return to the air end through the purge oil return
line.
2.6.2
Fluid/air separator tank
In addition to separating the air from the fluid, the fluid/air
separator tank acts as a fluid reservoir, storing most of
the compressor fluid.
2.6.2.1 Fluid filler port and sight glass
The fluid/air separator tank is equipped with a fluid filler
port and sight glass. Since trace amounts of compressor
fluid remain in the discharged compressed air even after
separation, over time the fluid level of the compressor will
drop. You will need to monitor the fluid level and periodi-
cally add additional fluid to the tank.
Additional information
• For an explanation of how determine the fluid
level of the compressor, see
Section 6.3.7:
Compressor fluid levels
on page 34.
• For instructions on how to add compressor
fluid, see
Section 6.4.1: Adding compressor
fluid
on page 35.
2.6.2.2 Separator tank condensation—low
operating temperature
In conditions of high humidity and low operating tempera-
ture, water formed by condensation may collect in the
compressor fluid. To ensure trouble-free operation, Sul-
lair ShopTek™ compressors are fitted with an oil bypass
thermal valve set at the temperature required to evapo-
rate water.
In areas where the ambient temperature is less than 4°C
(40°F), you may need to take steps to prevent condensa-
tion. This may include fitting anti-condensation heaters to
the separator vessel. For assistance in operating the
compressor in very low ambient temperatures, please
contact your Sullair representative.
2.6.3
Fluid/air separator element
The fluid/air separator element removes fine fluid parti-
cles from the compressed air stream.
Over time, impurities in the lubrication system will clog
the fluid/air separator element, increasing the resistance
of the separator to compressed air flow. Because the
increased resistance will compromise the compressor’s
operation, the separator element needs to be replaced
periodically.
Additional information
• For the recommended fluid/air separator ele-
ment maintenance schedule, see
Section 6.3:
Recommended maintenance schedule
on page
33.
• For instructions on how to change the fluid/air
separator element, see
Section 6.4.6: Fluid/air
separator maintenance
on page 37.
2.7
Microprocessor control system
The ShopTek™ compressor is equipped with a micropro-
cessor controller. For detailed information on this control-
ler, see
EC2000 Controller Operation Manual
.
