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  1. #1
    Join Date
    Apr 2010
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    Charging R410a and R422D

    Can anyone direct me to a website that shows the proper way to charge R410a, and have any of you guys converted over to the new R22? I'm hearing different ways to convert. One of the ways was to change the valve stem and just charge the normal way, but there are other ways as well.


  2. #2
    Join Date
    Mar 2003
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    Charge it like you would any other system using either sub-cool if a txv system or superheat if a fixed orifice...or weigh it in and check both. Beware of the new r-22 some have butane/propane properties.

  3. #3
    Join Date
    May 2011
    Ripley, WV
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    Also keep in mind you're supposed to Charge blended refrigerants in liquid form (Be sure to throttle it in).

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