Results 1 to 9 of 9
  1. #1
    Join Date
    May 2006
    Location
    Zimbabwe / Zambia
    Age
    83
    Posts
    16
    Rep Power
    0

    Replacement For R502



    Hello All, again the lack of spares and support in Zimbabwe & Botswana is causing major problems. I have a number of older Minus 40 chest freezers (Domestic) to repair, by the way Minus 40 is a brand name. Almost all these units are using R502. I know that the replacement refrigerant for R502 is R404a, which is obtainable in my area. The problem is that the cost of converting the older units to R404a is very heavy. As a result, it makes sense for my customes to simply buy new freezers as apposed to repairing the old ones. This results in my losing business and is rather a shame as these freezers, are generaly in good condition. Is there a "drop in" refrigerant available? If not, can someone suggest a workable alternative.

    Many thanks

    Mastercool



  2. #2
    Join Date
    Jul 2007
    Location
    Australia
    Age
    50
    Posts
    1,855
    Rep Power
    20

    Re: Replacement For R502

    Dupont HP80 (R402A)
    forane FX10 (R408A)
    I used a few drop ins for R12, R500 and R502 back in the mid 1990s, don;t know if they are still available or they ended up being any good though

  3. #3
    Join Date
    May 2006
    Location
    Zimbabwe / Zambia
    Age
    83
    Posts
    16
    Rep Power
    0

    Re: Replacement For R502

    Hello Paul, many thanks for the quick reply. Are you sayimg that i can use R408a to top up a R502 system? If so I am very glad as a canister of R408a is in fact available.

  4. #4
    Join Date
    Jul 2007
    Location
    Australia
    Age
    50
    Posts
    1,855
    Rep Power
    20

    Re: Replacement For R502

    Says not to mix it with r502 or use it for top ups here:
    http://www.arkema-inc.com/index.cfm?pag=35
    assuming you meant 'top up' as adding to a r502 system. But if you meant evac and charging just with 408A, yes you can.
    Last edited by paul_h; 14-12-2010 at 12:04 PM.

  5. #5
    Join Date
    May 2006
    Location
    Zimbabwe / Zambia
    Age
    83
    Posts
    16
    Rep Power
    0

    Re: Replacement For R502

    Hello again, many thanks for your help. I have looked the data on R408a and am sure that the use of that refrigerasnt is in fact the answer to my problem.

    Thank you again

  6. #6
    Join Date
    Nov 2010
    Location
    The Netherlands
    Age
    64
    Posts
    134
    Rep Power
    14

    Re: Replacement For R502

    R403b (69L) is also a direct drop-in for R502. It has better capacity at lower temperatures.

  7. #7
    Join Date
    Jul 2010
    Location
    NTH.QLD Australia
    Age
    62
    Posts
    1,762
    Rep Power
    32

    Re: Replacement For R502

    R408a eventually discolours the oil if working in high ambient temperatures. Might consider drier change as well.
    To the optimist, the glass is half full. To the pessimist, the glass is half empty.

  8. #8
    Join Date
    Jun 2009
    Location
    North East England
    Age
    41
    Posts
    714
    Rep Power
    19

    Re: Replacement For R502

    r408a is a drop in for 502 however it contains around 70% r22 so if the phase out affects you then it is a bad choice

  9. #9
    Join Date
    May 2006
    Location
    Zimbabwe / Zambia
    Age
    83
    Posts
    16
    Rep Power
    0

    Re: Replacement For R502

    Many many thanks for all the comments. I am able to obtain R408a in Botswana. This will make my life so much easier.

Similar Threads

  1. R22 replacement
    By brad__34 in forum Refrigerants
    Replies: 28
    Last Post: 04-06-2010, 09:06 PM
  2. Replacement for R403b
    By fridgability in forum Refrigerants
    Replies: 2
    Last Post: 20-08-2009, 03:36 PM
  3. Replacement Chiller Barrel Selection
    By archibaldtuttle in forum Air Conditioning
    Replies: 0
    Last Post: 09-06-2009, 08:09 PM
  4. Replacement Screw Compressors
    By dkemper in forum Technical Discussions
    Replies: 2
    Last Post: 13-10-2007, 07:22 PM
  5. F 11 replacement for flushing
    By andrewuk in forum Refrigerants
    Replies: 1
    Last Post: 17-10-2003, 11:03 PM

Posting Permissions

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