Quote Originally Posted by RANGER1 View Post
12embo,
Can you advise on oil temperature & set point.
Usually 10 to 15 deg C above saturated condensing pressure.
So about 50 deg C.
Discharge temperature seems a little high, is oil filter clean, small pressure drop?
Can you increase suction superheat at all?
It might help reduce oil foaming.
If secondary oil separator working, would expect oil return to be quite warm most of the time.
Bitzer & Temprite have suitable oil separators with coalescer filter for optimal oil separation, maybe check against similar size machine, or capacity you have.
If velocity to high oil separator not likely to work.

https://www.bitzer.de/us/us/oil-sepa...he-oas-series/

https://temprite.com/downloads/920-920R_kW_Sizing.pdf

https://temprite.com/downloads/EmersonReport.pdf
Hi again.
According to the technical data of the compressors oil cooler should start working when the temperature reach 110 degree centigrade and stop working when the temperature reaches 100. Although I agree with you according to my own experience which says the oil temperature should be about 55 to 65 degrees so I need to change the oil cooler maybe?
I did not find any oil separator with coalescer in Iran. Any suggestions?
By high velocity that you mentioned you mean the oil sepearator could be small?