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  1. #1

    Hmm any advice appreciated,greatly!

    ive been in mobile ac for decades,but need residential advice(own residence).have ancient central ac that been leaking/inop for approximately two decades,researching retrofit.its r-22 are all new residential r-410a?i used to top off w/r-22 annually.also ive been told i cant retrofit to r-410a from r-22,im assuming its expansion not orifice,does anyone have any insight into the evap,comp.,cond. performance with a legal refrigerant.does anyone know why r-22 evap,cond,comp. is incompatible with whatever the new refrigerant is,i can change high and low switches and expansion valve?

  2. #2
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    410a wont properly pick up and carry the oil that resides in your r-22 compressor. Thats just one of many reasons what you are talking about doing is wrong, in many ways.

    Mobile home and residential is the same thing with the only difference being the high static blower in mobile homes and the pre-charged quick connect fittings.

    Screwing on quick connects and hooking up 240v and two stat wires to the outdoor unit does not qualify you by any stretch as a tech..

    Id suggest calling a professional.

  3. #3
    mobile as in with tires under it.

  4. #4
    ive been a proffessional over 3 decades,thanx anyway

  5. #5
    Join Date
    Jul 2007
    Location
    Mount Airy, MD
    Posts
    7,281

  6. #6
    Join Date
    Apr 2012
    Location
    Paper Street Soap Company
    Posts
    2,304
    Quote Originally Posted by unk View Post
    ive been a proffessional over 3 decades,thanx anyway
    You would be better off picking up anew 410A system and having it installed.

    You cant retro 410 a into a R22 system.

  7. #7
    Join Date
    Jul 2004
    Location
    Massachusetts
    Posts
    6,841
    R-22 systems are tested to a maximum of 500 psig for integrity. The thought is that R-22 rarely gets to 500 psig, so it's a good test pressure. R-410A on the other hand can easily hit 500 psig and so that equipment is tested to much higher pressures. So you'll first find that unless the indoor coil is dual rated, it's only good for R-22. A second limitation are the different characteristics of the two refrigerants. Since they have different boiling and condensing characteristics, they're not miscible nor can you interchange them without modifying the metering device. If you're going to try and keep the same outdoor unit, you're first obstacle is just as the indoor unit, test pressure. The second is the compressor, which is specifically an R-22 compressor.

    By the time you got done changing all the things that need to be changed to make it an R-410A compatible system, it would have been both less expensive and quicker to just buy an R-410A system in the first place. See?
    If YOU want change, YOU have to first change.

    If you are waiting for the 'other guy' to change first, just remember, you're the 'other guy's' other guy. To continue to expect real change when you keep acting the same way as always, is folly. Won't happen. Real change will only happen when a majority of the people change the way they vote!

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