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Dheeraj
29-05-2010, 06:07 AM
Need some expert opinion on effect in refrigeration system working with R134a and synthetic oil contaminated with forane-141b.
One of our customer had run a centrifugal chiller operating with R134a and synthetic oil – 46 grade, after charging fresh refrigerant. On few minutes, the oil pressure dropped drastically. On evaluation it was found that the oil viscosity had dropped down by almost 50%. On testing, the refrigerant was found to be contaminated with forane-141b.
Can you please suggest any possible effects of forane-141b on a synthetic oil and effect of R134a & forane-141b mixture?
Space Shifter
25-07-2010, 02:56 AM
sounds to me like the system wasnt flushed properly to remove all the old oil...
frederik79
25-07-2010, 08:56 AM
Need some expert opinion on effect in refrigeration system working with R134a and synthetic oil contaminated with forane-141b.
One of our customer had run a centrifugal chiller operating with R134a and synthetic oil – 46 grade, after charging fresh refrigerant. On few minutes, the oil pressure dropped drastically. On evaluation it was found that the oil viscosity had dropped down by almost 50%. On testing, the refrigerant was found to be contaminated with forane-141b.
Can you please suggest any possible effects of forane-141b on a synthetic oil and effect of R134a & forane-141b mixture?


whas the unit charged enough to start with ... (R134a)
sfnz
02-09-2010, 11:23 AM
Need some expert opinion on effect in refrigeration system working with R134a and synthetic oil contaminated with forane-141b.
One of our customer had run a centrifugal chiller operating with R134a and synthetic oil – 46 grade, after charging fresh refrigerant. On few minutes, the oil pressure dropped drastically. On evaluation it was found that the oil viscosity had dropped down by almost 50%. On testing, the refrigerant was found to be contaminated with forane-141b.
Can you please suggest any possible effects of forane-141b on a synthetic oil and effect of R134a & forane-141b mixture?

get the feeling there is more to this than you are letting on...........WHY was 141B in there?, WHY wasn't it removed ? how long was the vacuum ????
NoNickName
02-09-2010, 03:34 PM
R141b is a flushing agent. Did the system have a burn out or was it flooded with water?