1100E, 1500E, 1800E USER MANUAL SECTION 2
14
2.4 COMPRESSOR COOLING
AND LUBRICATION SYSTEM,
FUNCTIONAL DESCRIPTION
Refer to Figure 2-2 The Cooling and Lubrication
System consists of a fan, fan motor, radiator-type
aftercooler/fluid cooler, full flow fluid filter, thermal
valve, and interconnecting hoses. The pressure in
the separator/sump causes fluid flow by forcing the
fluid from the high pressure area of the separator/
sump to an area of lower pressure in the compressor
unit.
Fluid flows from the bottom of the separator/sump to
the thermal valve. The thermal valve is fully open
when the fluid temperature is below 185˚F (85˚C).
The fluid passes through the thermal valve, the main
filter and directly to the compressor unit where it
lubricates, cools and seals the rotors and the
compression chamber.
As the discharge temperature rises above 185˚F
(85˚C), due to the heat of compression, the thermal
valve begins to adjust and a portion of the fluid then
flows through the cooler. From the cooler the fluid
flows to the fluid filter and then on to the compressor
unit.
A portion of the fluid flowing to the compressor is
routed to the anti-friction bearings which support the
rotors inside the compressor unit.
The fluid filter has a replacement element and an
integral pressure bypass valve. A message on the
WS Controller indicates when the fluid filter needs to
be changed.
Figure 2-2: Cooling and Lubrication System
1. Compressor
2. Cooler
3. Fluid Filter
4. Thermal Valve
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