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19 2008SSD-34 (5/08)
Dual-Compressor Module Maintenance
CHECK FOR THESE CONDITIONS UNDER NORMAL OPERATION:
___ 1. Compressor speed should range from 2400 to 4800 rpm during normal operation.
___ 2. Suction pressure range is model specifi c.
___ 3. Discharge pressure should range from 70 psig to 190 psig, depending on the model
(see Compressor Module Nomenclature on page iv).
___ 4. Pressure differential between suction and discharge is at least 70 psi.
___ 5. First-stage separator temperature should be between 170°F and 220°F (77-104°C) model specifi c.
___ 6. Oil cooler fans should either run continuously or cycle periodically under normal conditions.
If any of these conditions are not met during normal operation, shut down the unit and refer to 5.0 -
Troubleshooting on page 27.
4.0 MAINTENANCE
4.1 Routine Maintenance
Perform the maintenance procedures in Table 5 at least once per year or more often if needed.
Oil consumption varies by application and during initial operation. Monitor the oil level routinely to
determine a consistent pattern of actual consumption.
Table 5 Maintenance summary
Components Maintenance Reason For details, see:
Lubrication
& Cooling
System
• Monitor and check the oil level.
A low oil level or loss
of oil in the system will
result in overheating or
mechanical failure.
A high oil level may result
in excessive oil carryover
and oil discharge from
the Compressor Module
when the Compressors
are turned off.
4.3 - Checking
the Oil Level
(page 20)
• Add oil as needed.
4.5.1 - Topping
Off the Oil Level
(page 21)
• Change oil annually.
Note: Some applications may require more
frequent service.
4.5.2 - Changing
the Oil
(page 22)
• Check the condition of the lubricant
periodically. Normal color is clear or light
gray.
—
• Change the oil fi lter (if equipped) annually
or as required.
—
Gas Inlet
System
• Inspect and clean the inlet screen annually
or more often as needed.
A restricted inlet screen
will result in reduced fl ow.
4.6 - Cleaning
the Inlet Screen
(page 24)
Second-
Stage
Separator
System
• Inspect and clean the scavenge line orifi ce
annually or more often as needed.
A restricted scavenge
line orifi ce will result in
excessive oil carryover.
4.7 - Servicing
the Scavenge
Line Orifi ce
(page 24)
• Change the second-stage oil separator
element annually or more often if
contaminated.
Note: Some applications may require more
frequent service.
A dirty or plugged
separator element will
result in excessive oil
carryover.
4.8 - Changing
the Second-
Stage Separator
Element
(page 25)
Oil Heat
Exchanger
• Ensure heat exchanger cooling fi ns are clear
of dust and debris.
• Verify that the fans run freely.
——
See 5.0 - Troubleshooting on page 27 for additional details.