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8. Turn on oil heater and warm the oil to 140 to 150 F (60 to 66 C). Operate the oil pump for 2
minutes. Add oil if required to keep level up to lower sight glass.
Oil should be visible in the reservoir sight glass during all operating and shutdown condi-
tions.
Oil Specification
If oil is to be added, it must meet the following Carrier specifications:
• Oil Type for units using HFC-134a............................................ Inhibited
polyol ester-based synthetic compressor oil formatted for use with
HCFC and HFC, gear-driven, hermetic compressors.
• ISO Viscosity Grade............................................................................68
The polyol ester-based oil may be ordered from your local Carrier representative (Carrier
Part No. PP23B2103).
Oil Changes
Carrier recommends changing the oil after the first year of operation and every three to five
years thereafter as a minimum along with a yearly oil analysis. However, if a continuous oil
monitoring system is functioning and a yearly oil analysis is performed, time between oil
changes can be extended.