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Thread: R22 to R134a

  1. #1
    Join Date
    Oct 2003
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    Confused R22 to R134a

    Cost of R22 is getting out of the area where I am comfortable with it r-134 now is less than half the cost of r-22.
    Hot Shot and R-407 still not ball park so can a r-22 be upgraded to R134a?

  2. #2
    Join Date
    May 2004
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    Austin, TX
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    Big pressure difference, not sure the compressor can handle it. Too
    many items to change out.

  3. #3
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    If Guns Kill People, Do Pencils Misspell Words?

    http://www.youtube.com/watch?v=An2a1...eature=related

    Before we work on artificial intelligence why don't we do something about natural stupidity?

  4. #4
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    Anything can be done if you change out enough parts.

  5. #5
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    Jun 2003
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    Florida
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    R-134a is the replacement for r-12, not r-22......you can put in whatever refrigerant you want but the system is only designed for one type usually, and a drop-in will be a close match. You go changing refrigerants and a nightmare will be created....
    If everything was always done "by the book"....the book would never change.

  6. #6
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    Would have to swap oil for a R407 upgrade anyway whats the diff. besides changing metering devices.

  7. #7
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    All your pressure controls and safeties etc would have to be changed as 134a runs at considerably lower pressures. Add in compressors metering devices oil would also hav to be changed getting pretty close to a new unit. Stick with 407c or there is a drop in by dupont r422d we have been trying out haven't had any problems yet but time will tell.

  8. #8
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    Oct 2003
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    Valdosta Ga
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    Thanks for info on R422d well check it out

  9. #9
    Join Date
    Mar 2008
    Location
    Houston, Tx
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    Assuming you get it working, both R-134a and 422b will give you a capacity reduction -(20% for R 422B)

  10. #10
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    Oct 2003
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    Valdosta Ga
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    That would be right on the capcity reduction but there are alot of older overside systems here that are prime canidates.

  11. #11
    Join Date
    Apr 2007
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    6,285
    Quote Originally Posted by dlupkes View Post
    Assuming you get it working, both R-134a and 422b will give you a capacity reduction -(20% for R 422B)

    422D??


    For low temp it is more 14% efficient and for medium temp it has the same performance as R-22 according to DuPont.

  12. #12
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    I guess if you want R422d your going to have to get it from a new Distributer because the older Distributer's have stocked up on R-22
    an will not sell R422d till R-22 is gone.

  13. #13
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    Find a new distributer most don't stock it but we have not had any problems getting it.

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