Carrier 17/19EX - Manual (Page 246)

Compressor Bearing and Gear Maintenance
The key to good bearing and gear maintenance is proper lubrication. Use the proper grade of
oil, maintained at recommended level, temperature, and pressure. Inspect the lubrication
system regularly and thoroughly.
Only a trained service technician should remove and examine the bearings. The bearings
and gears should be examined on a scheduled basis for signs of wear. The frequency of
examination is determined by the hours of machine operation, load conditions during operation,
and the condition of the oil and the lubrication system. Excessive bearing wear can sometimes
be detected through increased vibration or increased bearing temperature. If either symptom
appears, contact an experienced and responsible service organization for assistance.
Inspect the Heat Exchanger Tubes
Cooler
Inspect and clean the cooler tubes at the end of the first operating season. Because these
tubes have internal ridges, a rotary-type tube cleaning system is necessary to fully clean the
tubes. Upon inspection, the tube condition will determine the scheduled frequency for cleaning,
and will indicate whether water treatment is adequate in the chilled water/brine circuit. Inspect
the entering and leaving chilled water temperature sensors for signs of slime, corrosion, or
scale. Replace the sensor if corroded or remove any scale if found.