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TRG-TRC010-EN 33
period four
Maintenance Considerations
notes
Some centrifugal compressor designs do require periodic maintenance of
mechanical system components. This includes oil and refrigerant filter changes,
oil strainer changes, and a compressor inspection.
Open-motor compressor designs require shaft alignment, coupling inspection,
bearing lubrication, and cleaning of the motor windings on a quarterly or
annual basis.
In all cases, strictly follow the maintenance requirements and
recommendations published by the manufacturer.
To ensure optimum heat transfer performance, the heat transfer surfaces must
be kept free of scale and sludge. Even a thin deposit of scale can substantially
reduce heat transfer capacity. Engage the services of a qualified water
treatment specialist to determine the level of water treatment required to
remove contaminants from the cooling tower water.
▲ Other design-specific requirements
◆ Change oil when oil analysis dictates
◆ Replace oil filter periodically
◆ Replace filter drier periodically
◆ Clean oil strainers annually
◆ Check shaft alignment annually
◆ Check coupling annually
◆ Replace shaft seal every 2 to 4 years
◆ Compressor teardown inspection every 5 to 10 years
maintenance considerations
Mechanical Components
Figure 47
maintenance considerations
Heat Transfer Surfaces
▲ Recommended maintenance
◆ Use a qualified water treatment
specialist
◆ Clean condenser tubes as
needed
◆ Clean water-side strainers
◆ Test tubes every 3 years
Figure 48
trgtrc010_book.book Page 33 Wednesday, September 1, 1999 10:42 AM