Hi forum ..

Recently we Installed new Screw Compressor , Bitzer Semi Hermetic - HSN7471 Compressor.

In the Oil was lifting continuously and not coming back to compressor.
Initially there was suction accumulator , we removed it ,after 4 days oil separator is almost empty. at that suction pressure is 10psi, discharge pressure is 190 psi ,oil pressure is 175 psi.
chiller inlet minus 14deg outlet minus 18.4 deg.
Chiller is operating with electronic expansion valve

Please any one suggest what may be the issue, why oil is not coming back .


Regards.