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  1. #1
    Join Date
    Jan 2007
    Posts
    13

    Peh Mcquay Question

    Long time reader, first time asking question. Found a bad vane close switch today on a peh 063 r-12 chiller. Can this be changed without removing freon? Noticed no isolation valves but thought maybe the fittings had shrader ports in them. Any help?

  2. #2
    Yes. Best to have someone experienced show you how. (no schrader valves)
    Last edited by btexpress; 02-07-2007 at 01:17 AM.

  3. #3
    Join Date
    Sep 2002
    Posts
    525
    Just make sure the switch is bad. I had this same problem on the same type of machine and found that the vanes were stuck open. Jumped out switch to check.....Machine started fully loaded....it was NOT pretty!

  4. #4
    Join Date
    Jan 2007
    Posts
    13
    How can I check to see if the vanes are closed without starting up?

  5. #5
    Join Date
    Feb 2003
    Location
    Wichita Ks
    Posts
    1,489
    install fittings on the 2 oil lines that the vane closure switch goes to and read the pressures. if they are the same then the vanes are not closed all the way. run the oil pump while checking.

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