Results 1 to 9 of 9

Thread: R22 air conditioner refrigerant options

  1. #1
    4 Star General Steel Soldiers Vendor Suprman's Avatar
    Join Date
    Feb 2013
    Location
    Stratford/Connecticut
    Posts
    6,457
    Thanks
    25
    Thanked 2,261 Times in 1,499 Posts

    Default R22 air conditioner refrigerant options

    Have a few r22 air conditioners. I have seen a few different "drop in" replacements advertised. Saw some say you can use r407c. Not my area of expertise. Any recommendations?
    Will

  2. #2
    4 Star General Guyfang's Avatar
    Join Date
    Dec 2015
    Location
    Burgkunstadt, Germany
    Posts
    5,829
    Thanks
    10,610
    Thanked 4,998 Times in 2,419 Posts

    Default

    The army used R407C. Its best to pump it down, remove the R22 and then replace the filter. Then recharge with 407C. You can not mix them.

  3. The Following 2 Users Say Thank You to Guyfang For This Useful Post:

    SCSG-G4 (08-09-2019), silverstate55 (08-14-2019)

  4. #3
    4 Star General Steel Soldiers Vendor Suprman's Avatar
    Join Date
    Feb 2013
    Location
    Stratford/Connecticut
    Posts
    6,457
    Thanks
    25
    Thanked 2,261 Times in 1,499 Posts

    Default

    I have 407c. I had read somehere the compressor oil has to be compatible though.
    Will

  5. #4
    4 Star General Guyfang's Avatar
    Join Date
    Dec 2015
    Location
    Burgkunstadt, Germany
    Posts
    5,829
    Thanks
    10,610
    Thanked 4,998 Times in 2,419 Posts

    Default

    I never saw anyone change compressor oil. I will ask someone I know in CECOM.

  6. The Following User Says Thank You to Guyfang For This Useful Post:

    silverstate55 (08-14-2019)

  7. #5
    4 Star General Coffey1's Avatar
    Join Date
    Sep 2012
    Location
    Gray Court SC
    Posts
    3,526
    Thanks
    470
    Thanked 2,710 Times in 1,224 Posts

    Default

    Rs44
    Member of peanut gallery

  8. The Following 2 Users Say Thank You to Coffey1 For This Useful Post:

    SCSG-G4 (08-09-2019), silverstate55 (08-14-2019)

  9. #6
    Private
    Join Date
    Dec 2018
    Location
    Waynesboro/pa.
    Posts
    5
    Thanks
    0
    Thanked 2 Times in 1 Post

    Default

    there is a direct replacement for R22/R407C, its called M099. Good stuff!
    No component changes needed.
    Last edited by Walnut6; 08-14-2019 at 12:42.

  10. The Following 2 Users Say Thank You to Walnut6 For This Useful Post:

    Guyfang (08-14-2019), silverstate55 (08-14-2019)

  11. #7
    Private
    Join Date
    Dec 2018
    Location
    Waynesboro/pa.
    Posts
    5
    Thanks
    0
    Thanked 2 Times in 1 Post

    Default

    Haven't converted my 3-ton units yet, one is R22 and the other is R407C.

  12. #8
    4 Star General Guyfang's Avatar
    Join Date
    Dec 2015
    Location
    Burgkunstadt, Germany
    Posts
    5,829
    Thanks
    10,610
    Thanked 4,998 Times in 2,419 Posts

    Default

    Will,

    This is from someone I call Obi Wan. He is the last word on things like this in the military. This is take it to the bank info.

    R22 Question. Simple, you DON’T. NEVER replace R22 in a system with R407C like Toby, (Tobyhanna) tried to do with the DRASH units. Refrigerant and all oils have to be changed. Just go to Getronics or DuPont and it is all there. If you don’t (there is always oils left) the mix creates an acid that in about a year you will be changing the compressor. It eats F type insulation. You never get all the oils out no matter how hard you try. There is always the lucky ones though. Better: Deep vacuum, 300-500 microns, then charge the system with about the same amount of R438a, no nothing else. So far it is running about 96-98% charge by weight of R438a for what was R22. Direct drop in and so far no bad results. ASAALT and EPA seem to believe this stuff is a good drop in replacement. R438 is expensive as they want to make money. Imagine a 200 Lb charge in a department store.

    Pink is my add in.

  13. The Following 2 Users Say Thank You to Guyfang For This Useful Post:

    milstencil (08-15-2019), silverstate55 (08-16-2019)

  14. #9
    4 Star General frank8003's Avatar
    Join Date
    May 2012
    Location
    Ft. Lauderdale, Florida
    Posts
    3,730
    Thanks
    2,620
    Thanked 5,777 Times in 1,975 Posts

    Default

    I don't know, this is what I found interesting.

    https://www.chemours.com/ISCEON/en_U...reon-MO99.html


    Dupont ISCEON M099 R-438A 25 pounds for 250 bucks
    MO99_retrofit_guidelines.pdf

    111048-2T.jpg
    Last edited by frank8003; 08-16-2019 at 02:25.
    I was here, had a good time.

  15. The Following 2 Users Say Thank You to frank8003 For This Useful Post:

    Guyfang (08-17-2019), silverstate55 (08-16-2019)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •