Does the foam in oil SG means liquid coming back to comp??
I've seen a system where Super heat was 25 deg and still glass was foaming badly.
Any Suggestions??
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Does the foam in oil SG means liquid coming back to comp??
I've seen a system where Super heat was 25 deg and still glass was foaming badly.
Any Suggestions??
May be caused by low suction pressure due to insufficient refrigerant.
jwasir, have you got a cch, < crank case heater < on the compressor?
The foam is boiling refrigerant.
Check that the oil level sight glass is over 38°C and it should be OK, a little bit of refrigerant in the oil never killed any compressor.
Some systems like Carrier Recip chillers keep the liquid solenoid closed for 30 seconds at start up to boil off any refrigerant in crank case. There could also be a partially blocked suction service valve strainer causing the same.
Quote:
Originally Posted by chemi-cool
hi chemi-cool, is this a good rule of thumb for all refrigerant oils?
if so, what is key about 38C and over?