Oil separators HS. and OS.
The figures here apply to HS. and OS. compressors with most refrigerants. With CS. compressors, the oil separator is integrated in the compressor, therefore they are not listed here. For OS.A compressors with R717 (ammonia):
- AT-640: Use of ammonia (R717) in Bitzer compressors
The discharge gas line should first be installed with a downward gradient from the shut-off valve on the compressor and the oil separator should be mounted in the discharge gas line immediately downstream of the compressor.
For Bitzer oil separators, see also
- DB-520: Operating Instructions Oil separators
Danger of compressor failure due to flooding with oil at standstill!
Place the solenoid valve in the oil injection line directly next to the compressor (exceptions are OS.85 and HS.85, they have an internal oil stop valve).
For CS. compressors: Position the solenoid valve directly before the oil inlet connection of the compressor and control it electrically in parallel with the compressor contactor (i.e. the solenoid valve is closed when the compressor is stopped).