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Maintenance
NOTE: See Motor Manual for proper lubrication procedures and service intervals.
Refrigeration Maintenance and Inspection Schedule
The following service intervals are based on the usage of Vilter Manufacturing Corporation Premium Grade refrig-
eration oil in VSS, VSM and VSR Single Screw Compressor units.
SERVICE INTERVAL (HOURS)
OIL CIRCUIT
Oil Change (1) R R R R R R R
Oil Analysis (2) S S S S S S S S S S S S S
Oil Filters (3) R R R R R R R R R R R R R R
Oil Strainer I I I I I I I I I I I I I I
PACKAGE
Coalescing Elements R R R R
Suction Screen I I I I I I I I I I I I I I
Liquid Line Strainers I I I I I I I I I I I I I I
Coupling Alignment
and Integrity I I I I I I I I I I I I I I
CONTROL
CALIBRATION Transducers I I I I I I I I I I I I I I
RTD’s I I I I I I I I I I I I I I
COMPRESSOR
Inspect Compressor I I I I I I I
Bearings I
Key I Inspect.
R Replace.
S Sample.
Notes: (1) The oil should be changed at these intervals, unless oil analysis results exceed the allowable limits.
The frequency of changes will depend on the system cleanliness.
(2) Oil analysis should be done at these intervals as a minimum; the frequency of analysis will depend on
system cleanliness.
(3) The oil filter(s) on a minimum must be changed at these intervals or annually if not run continuously.
However, the oil filter(s) must be changed if the oil filter differential exceeds 12 psi or oil analysis
requires it.
200
5,000
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
Inspection
Or
Group Maintenance
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