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  1. #1
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    Mar 2018
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    Changing refrigerants



    Purchased an older walk in cooler that was charged with r12 want to change to 134a what kind of oil do I need to use has aklyate synthetic in it now or would there be a better choice of refrigerants
    Last edited by Ranken; 27-08-2018 at 03:34 PM.



  2. #2
    Join Date
    Sep 2003
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    ISRAEL
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    Re: Changing refrigerants

    You need to emty the compressor, charge with POE, the oil viscosity depends on evaporating temp,

    Run some refrigerant oil cleaner through the pipe work, pushing it with OFN, replace the TXV to 134 one, new drier, good vacuum, charge and run the unit.

  3. #3
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    Mar 2018
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    Re: Changing refrigerants

    Thanks will try that

  4. #4
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    Re: Changing refrigerants

    Would there be a better choice of refrigerant other than 134a

  5. #5
    Join Date
    Mar 2012
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    denmark
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    Re: Changing refrigerants

    Check out Lindes "Retrofit Guide", they suggest a few alternatives like R423A, R426A, R437A depending on application, and suggests oil changes.
    Remember to renew gaskets and check the superheat settings

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