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Thread: C3 & C4 oils

  1. #1
    Join Date
    Jul 2004
    We have a chiller that has Carrier O6D compressors. A technician replaced drier cores and changed oil. He used C4 instead of C3 which I know is the right oil. C4 was used more in R12,11,113 applications. There is nothing special about this chiller,R22 process chilled water. Can someone shed some light on this? I'm afraid of wax build up and poor oil return.

  2. #2
    Join Date
    Aug 2002
    Greenville SC
    I wouldn't worry about it. Since it isn't on a low temp application, there shouldn't be a problem.

  3. #3
    Join Date
    Oct 2004
    you don't have to worry about wax build up. c4 oil is the same as 4gs oil and national 300. it is a 300 weight oil as apossed to c3 being a 150 weight oil.

  4. #4
    Join Date
    Feb 2003
    Wichita Ks
    carrier recommends 150 oil in the 06d and 06e compressors. i have seen 300 oil in those compressors and havent seen any problems. if the chiller is inside i would not worry about it. if they are in warranty then you might have a problem if something happens.

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