chiller oil level not maintain

[falibhatti]

hi,
i,m working on the york centrifugal chiller model ykqghq75cnf , now days we r facing problem, our company buy this used chillier, we filled refrigerant R134a in it 1900lbs & also we filled york oil 2 times but when cillier in running position oil sump sight glass shows very few oil level, plz tell me how we solve this problem, thanks i advance

[Brian_UK]

Where is the oil going ??

Is the machine running at full load ?

Is the evaporator oil logged?

[falibhatti]

yes sir , we running chiller on full load , the oil mixed with refrigerant in evaporater , when we running on many hour on full load then slow come on silght glass but not not maintain i,m looking forward for ur reply

[sedgy]

I have worked on westinghouse for many years on water cooles centrifs,
the disapearence of oil is just the same as I have experianced many times chiller not fully loaded all the oil is in the evaporator

[Tung]

I am afraid it is too late to offer you some information for oil loss of YK chiller,
several things for you to check;
1. the suggested oil charge is 20Gal of York K oil.
2. check the LOP and Evap pressure, if the LOP is higher than Evap pressure, then you have wear on B.P seal in the compressor, the oil accumulated in evaporator can't be educed back to compressor or oil sump.
3. is the drier/filter blocked or the solenoid valve defective?
4. check the return tube, if it is not dewed, it is the sign the oil return system has problem.