Sullair LS20T 1100 CFM, Operator'S Manual And Parts List

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Section 7
MAINTENANCE
29
7.1 MAINTENANCE INTRODUCTION
The Supervisor Controller monitors the status of
the air filter, fluid filter, and separator elements.
When maintenance to these devices is required,
the Supervisor will display the appropriate mainte-
nance message and flash the location LED on the
graphics map as a visual reminder.
7.2 DAILY OPERATION
Following a routine start, observe the various
Supervisor Controller displays to check that normal
readings are being made - previous records are
very helpful in determining the normalcy of the
measurements. These observations should be
made during all expected modes of operation (i.e.
full load, no-load, different line pressures, cooling
water temperatures, etc.).
During the initial start-up or servicing of the pack-
age, fluid may have to be added to the sump ves-
sel to restore an adequate level. Frequent fluid
additions to maintain said level would be indicative
of excessive fluid consumption, and should be
investigated - see the Troubleshooting Section of
this manual for probable cause and remedy.
7.3 MAINTENANCE AFTER INITIAL 50 HOURS OF
OPERATION
After the initial 50 hours of operation, a few mainte-
nance requirements are needed to rid the system of
any foreign materials which may have accumulated
during compressor assembly. Perform the following
maintenance operations to prevent unnecessary
problems.
1. Clean the return line strainers.
2. Clean the return line orifices.
3. Change the fluid filter elements.
4. Clean the control line filter.
5. Clean moisture drain trap strainer.
7.4 MAINTENANCE AS REQUIRED BY LUBRICA-
TION GUIDE (SECTION 3)
1. Drain the sump and change the compressor fluid.
2. Replace the main fluid filter element.
3. Clean the return line strainers and orifices.
4. Clean or replace the control line filter element.
7.5 FLUID CHANGE
Standard models are filled with Sullube. Sullube
should be changed under the following conditions,
whichever occur first:
1. Every 1200 hours.
2. Once a year.
3. As indicated by fluid analysis.
A fluid sample at every 1000 hours is recommend-
ed. For a free Sullube analysis, send fluid to:
Dow Chemical
Lubricant Technology Center
Building B-1605
Freeport, TX 77541
To facilitate this, a sample bottle is included with the
compressor.
7.5.1 FLUID CONTAMINATION BASED UPON FLUID
ANALYSIS
Under certain conditions fluid may become contam-
inated. While this may indicate a fluid change,
attention must be taken to the potential remaining
fluid left inside the system after a change out.
7.6 MOTOR BEARINGS
Grease motor per manufacturer’s recommenda-
tions.
7.7 SEPARATOR MAINTENANCE INTRODUCTION
Refer to Separator Maintenance in Section 7.8.
Replace the separator elements when the separa-
tor maintenance message is displayed or after one
(1) year, whichever comes first. The separator ele-
ments must be replaced.
DO NOT clean the sepa-
rator elements.
7.8 PARTS REPLACEMENT AND ADJUSTMENT
PROCEDURES
FLUID FILTER MAINTENANCE
Refer to Figure 7-1 . The fluid filter (P/N 02250111-
592) is located schematically between the thermal
valve on the sump and the oil stop valve on the
DO NOT remove caps, plugs, and/or other compo-
nents when compressor is running or pressur-
ized.
Stop compressor and relieve all internal pressure
before doing so.
When performing a fluid change, there is a possi-
bility that fluid may be retained in the oil cooler.
There may also be fluid in the unit, the discharge
valve and piping. If this fluid is not removed
before introducing fresh fluid (as per fluid change
out), the fresh fluid may become contaminated.
A continuity check is critical to perform when
replacing separator elements.