SECTION 2 1800-3000 USER MANUAL
13
The 1800, 2200 & 3000 Series compressors are
factory-filled with Sullube lubricant. For more
information on fluid fill, refer to Section 3: Lubrication
Change Recommendations and Maintenance—Fluid
Filter and Separator on page 26.
Sullair 24KT compressors are filled with a fluid that
rarely needs to be changed. Use only Sullair 24KT
fluid in the event that a fluid change is required.
Sullair recommends that a 24KT sample be taken at
the first filter change and sent to the factory for
analysis. This is a free service. The sample kit with
instructions and self addressed container is to be
supplied by your Sullair dealer at start-up. The user
will receive an analysis report with
recommendations.
Fluid is injected into the compressor unit hoses and
mixes directly with the air as the rotors turn,
compressing the air. The fluid flow has three basic
functions:
1. As coolant, it controls the rise of air tempera-
ture normally associated with the heat of
compression.
2. Seals the clearance paths between the
rotors and the stator and also between the
rotors themselves.
3. Acts as a lubricating film between the rotors
allowing one rotor to directly drive the other,
which is an idler, and also lubricates the
bearings.
After the air/fluid mixture is discharged from
the compressor unit, the fluid is separated
from the air. At this time, the air flows
through an aftercooler and separator then to
your service line while the fluid is being
cooled in preparation for reinjection.
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 tank causes fluid flow by forcing
the fluid from the high pressure area of the separator/
sump tank to an area of lower pressure in the
compressor unit.
Fluid flows from the bottom of the separator/sump
tank to the thermal valve. The thermal valve is fully
open when the fluid temperature is below 185˚F
(85˚C) [200˚F (93˚C) for 24KT] and pressures are
rated above 150 psig. 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.
CAUTION
Mixing of other lubricants within the com-
pressor unit will void all warranties.
To Next Page
Loading...
