Ingersoll-Rand Thermo King CRR DF MPC2000, Maintenance Manual

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Refrigeration Maintenance and Service Operations
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3. After stopping the compressor, adjust the low side pressure to 21 kPa, 0.21 bar, 3 psig using the
service gauge set. (Pressure measured at the suction line service port.)
4. Remove the cap from oil pressure fitting on compressor.
5. Using a commercial hand pump, force oil in through the oil pressure fitting. Slowly add oil and allow
5 to 10 minutes for the oil to flow down through the compressor into the sump. Add Polyol Ester oil,
P/N 203-433 ONLY!
6. When the compressor oil sight glass is 1/2 to 3/4 full, remove hand pump and replace the cap on the
oil pressure fitting.
7. R-134a Compressor: Open the compressor suction service valve (or liquid line service valve) and
operate the unit. Recheck the refrigerant charge level and the oil level before returning the unit to
service.
Removing Excess Compressor Oil
1. Install an access valve actuator on the oil pressure fitting.
2. Operate the unit and remove oil while watching the level in the compressor sight glass.
NOTE: Heavy foaming of the oil as it leaves the compressor may indicate an excess of refrigerant in
the oil. Remove the access valve actuator and operate the system for 15 minutes to ensure warm sump.
Then recheck the oil level.
3. When the compressor oil sight glass is 1/2 to 3/4 full, remove access valve and replace the cap on the
oil pressure fitting.
4. Operate the unit and recheck the refrigerant charge level and the oil level before returning the unit to
service.
1. Normal R-134a and R-23 compressor oil
level: Sight glass is 1/4 to 3/4 full.
Figure 34: Checking Compressor Oil Level