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  1. #1
    Join Date
    May 2012
    Location
    Toronto, Canada
    Posts
    3

    Carrier 30HC chiller startup probs

    Having trouble establishing oil pressure on startup after extended shutdowns. Thinking of adding a heater to the condenser shell to keep refrigerant out of the oil. Experience???

  2. #2
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,701
    What do you mean by extended ? Both circuits ?
    UA 100

    It takes three people to do anything around here. Two do the work, one explains to the crowd of people who showed up when they seen smoke and flames.

  3. #3
    Join Date
    May 2012
    Location
    Toronto, Canada
    Posts
    3
    Off for the winter. Both circuits. Last few years we have been able to start by running hot water through the condenser, cold water through the evap before startup. This year still fails to establish pre-start oil pressure.

  4. #4
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,701
    Open your exv's up and run cold water thru the condenser. Your oil has migrated to the condenser. You must have the fist sized prelube pumps.
    UA 100

    It takes three people to do anything around here. Two do the work, one explains to the crowd of people who showed up when they seen smoke and flames.

  5. #5
    Join Date
    May 2012
    Location
    Toronto, Canada
    Posts
    3
    I'll try it. Yes, I have the fist-sized pumps. Thanks. We have the same problem when the machine cycles off on cool days. Any prevention?

  6. #6
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,701
    Quote Originally Posted by ChillerMike123 View Post
    I'll try it. Yes, I have the fist-sized pumps. Thanks. We have the same problem when the machine cycles off on cool days. Any prevention?
    Keep the condenser cooler than the evaporator. I have one that migrates every year . I just pump it over once a year.
    UA 100

    It takes three people to do anything around here. Two do the work, one explains to the crowd of people who showed up when they seen smoke and flames.

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