RWB II ROTARY SCREW COMPRESSOR UNITS
MAINTENANCE
070.200-IOM (DEC 11)
Page 33
RECOMMENDED
MAINTENANCE PROGRAM
In order to obtain maximum compressor unit perform ance
and ensure reliable operation, a regular main tenance pro‑
gram should be followed.
The compressor unit should be checked daily for leaks, ab‑
normal vibration, noise, and proper operation. A log should
also be maintained. There should be continued monitor ing
of oil quality and oil analysis testing. In addition,
an analysis
of the unit’s vibration should be periodic ally made.
VIBRATION ANALYSIS
Periodic vibration analysis can be useful in detecting bear‑
ing wear and other mechanical failures. If vibration analysis
is used as a part of your preventive main tenance program,
take the following guidelines into consideration.
1. Always take vibration readings from exactly the same
places and at exactly the same percentage of load.
2. Use vibration readings taken from the new unit at start‑up
as the base line reference.
3. Evaluate vibration readings carefully as the instru ment
range and function used can vary. Findings can be easily
misinterpreted.
4. Vibration readings can be influenced by other equip ment
operating in the vicinity or connected to the same piping as
the unit.
MOTOR BEARINGS
Follow the motor manufacturer’s maintenance recommenda‑
tions. See Figure 29.
Make sure the motor bearings are
properly lubricated before start-up
as required by the motor manuf ac-
turer.
OIL QUALITY and ANALYSIS
High quality refrigeration oil is necessary to ensure com‑
pressor longevity and reliability. Oil quality will rapidly de‑
teriorate in refrigeration systems containing moisture, air,
or other contaminants. In order to ensure the quality of the
refrigeration oil in the compressor unit.
DO NOT MIX OILS of different brands,
manufacturers, or types. Mixing of
oils may cause excessive oil foam-
ing, nuisance oil level cutouts, oil pressure loss, gas or
oil leakage and catastrophic compressor failure.
NOTE: The Frick oil charge shipped with the unit is the
best suited lubricant for the conditions specified at the
time of purchase. If there is any doubt due to the refriger-
ant, operating pressures, or temperatures, refer to Frick
Oil publication 160.802-SPC for guidance.
1. Only use Frick filter elements or warranty claim may
be denied.
2. Participate in a regular, periodic oil analysis program to
maintain oil and system integrity.
Figure 29
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