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  1. #1
    oskiwoski's Avatar
    oskiwoski Guest

    410 ahu r22 convert



    does the r22 expansion valve come inside the new 410a ahu or do you have to buy.



  2. #2
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    Re: 410 ahu r22 convert

    If it is a 410a AHU then it probably only has a 410a expansion device included.

    You can't just arbitrairily convert to 22. You must consider the coil, Distriutor orfice, and distribution tubes. Maybe other issues too like CSA, UL, and so on.

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