5 – 1
Section 5 • Maintenance/Service
VSS/VSR/VSM/VSH/VSSH Compressor • Installation, Operation and Service Manual • Emerson • 35391S
Group
Inspection/
Maintenance
Service Interval (Hours)
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
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 Strainers I I I I I I I I I I I I I I
Compressor
Unit
Coalescing Filter - - - - R - - R - - R - - R
Coalescing Drain Line I I I I I I I I I I I I I I
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
Motor (Compressor) See Motor Manual for proper lubrication procedures and service intervals.
Control
Calibration
Transducers I I I I I I I I I I I I I I
RTDs/ TTs I I I I I I I I I I I I I I
Slide Valve Motors
Slide valve calibration should be inspected monthly. Inspections can be performed through the
control panel. If a Non-Movement Alarm appears, calibrate immediately.
Compressor
Compressor w Slides
(4)
- I - I - I - I - I - I - I
Compressor w/o Slides
(5)
- - I I I I I I I I I I I I
Inspect for Back Spin
Inspect Every 5,000 Hours or As Needed
Inspect for Leak
Check Monthly
Bearings - - - - - - - - - - - - - I
I = Inspect S = Sampling R = Replace
(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 lter(s) on a minimum must be changed at these intervals or annually if not run continuously. However, the oil lter(s) must be changed if the oil lter differential
exceeds 12 psi or oil analysis requires it.
(4) Inspection includes - Gaterotor Inspection (backlash measurement, shelf clearance and gaterotor oat), End Play Measurement (main rotor & gaterotor), Slide Valve
Inspection (if applicable).
(5) For compressors with no slides (VSM-97, VSM-113, VSM-127)
Maintenance and Service Schedule - For VSS/VSM Unit Only
Follow this table for maintaining and servicing the compressor unit at hourly intervals.
Table 5-1. Maintenance/Service Schedule - For VSS/VSM Unit Only
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