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  1. 05-11-2013, 08:44 PM #1
    littlebigdad
    littlebigdad is offline Regular Guest
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    502 drop in replacement

    Is 408a a drop in for 502
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  2. 05-11-2013, 08:57 PM #2
    COOLJIM
    COOLJIM is offline Professional Member
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    yes 408A is used as a replacement for 502 systems , cant mix the 2 gasses
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  3. 05-11-2013, 08:59 PM #3
    littlebigdad
    littlebigdad is offline Regular Guest
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    We have a tech on call and he has has a walkin that is flat with 502 on the txv and no other markings. We are trying to get them up and running tonite
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  4. 05-11-2013, 09:00 PM #4
    littlebigdad
    littlebigdad is offline Regular Guest
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    Thanks for the reply hope we can get them going
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  5. 05-12-2013, 09:55 PM #5
    market-tech
    market-tech is offline Professional Member*
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    Hope it worked out for you.

    If running mineral oil you may run in to an issue.
    Jim
    Tucson, Az
    Keeping the Ice Cream Frozen!
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  6. 05-22-2013, 01:02 PM #6
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    StarCat
    StarCat is offline Regular Guest
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    MO-79, R-422A is worth looking into.
    We are having good success with MO-59 for R-22 sub on a similar note.
    Otherwise HP-80 is the best older substitute.
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  7. 05-22-2013, 10:13 PM #7
    littlebigdad
    littlebigdad is offline Regular Guest
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    Trouble is having the right jug on the truck. He found the leak on a solenoid valve so he had to go back
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