RFC SL Series Technical Manual page 34

legend:
1) Compressor
2) Oil sight glass
3) Solenoid valve
4) Oil flow switch
5) Oil filter
8) Oil separator
9) Condenser
12) Water-cooled cooler
13) Water regulating valve
The configuration requirements of the external oil circuit system:
1) The oil cooler should be installed near the compressor to avoid excessive pressure
drop in the oil circuit and cause poor oil supply to the compressor;
2) The installation position of the oil cooler should usually be lower than the compressor
and the oil separator to prevent the lubricating oil that may exist after the shutdown from filling
the compressor or flowing back into the oil separator, causing the compressor to start up or the
oil level in the oil separator to be too high. overflow condition;
3) The oil cooler must be equipped with a return oil temperature control device to ensure
that the return oil temperature is controlled at 40 ~60 ;
4) During normal operation, the difference between high and low pressure should not be
lower than 4bar, and the pressure drop of the oil cooler should be less than 0.5bar; in order to
ensure that the return oil temperature is within the specified range, a bypass with
electromagnetic In the oil circuit controlled by the valve, if the oil temperature is too low when
the compressor is running, open the bypass solenoid valve to quickly heat the oil temperature,
and at the same time, it can effectively adjust the load of the oil cooler under different working
conditions.