Three potential problems exist when using an oil separator:
· The separator can become cooler than the condenser during an off cycle causing the refrigerant vapor to migrate and condense in the separator. If this occurs, on the next on cycle, refrigerant will flow through the oil return line to the compressor crankcase resulting in possible compressor damage.
· A float valve stuck open will result in the high-temperature high-pressure refrigerant vapor raising the pressure and temperature at the suction side of the compressor which could overheat the motor and reduce system capacity.
· A float valve stuck closed will result in no oil return to the compressor. Insufficient oil for lubricating the compressor can also cause compressor damage.
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