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Thread: Nu22b

  1. #1
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    Nu22b

    Has anyone used the drop in refrigerant Nu22b in replacement of r22? Does it work good? Any advice on using it as a drop in? Or is there something better I could use?

  2. #2
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    I would not recommend it as a drop in. I worked for a company and that's all they used. It actually damaged a lot of compressors as well it would wash out something in the compressor and the rotors would lock up. It's ok for a emergency I guess but I would rather use mo99 but thats just my opinion. Of course you have to evacuate the system and pull a vacuum but it works good never had any issues with mo99

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  3. #3
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    Do not use in systems that have a Trane 3D compressor or have capacity control such as unloading. If you are just dealing with small recip compressors, then no problem.
    If you were a real tech, you'd solder a relay on that board and call it good to go.

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  5. #4
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    Thread Starter
    So besides mo99 as a replacement for r22 what does everyone think is the best replacement for r22?

  6. #5
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    Quote Originally Posted by BBeerme View Post
    Do not use in systems that have a Trane 3D compressor or have capacity control such as unloading. If you are just dealing with small recip compressors, then no problem.
    Yeah the issue was with trane compressors

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  7. #6
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    Quote Originally Posted by yakexican33 View Post
    Yeah the issue was with trane compressors

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    And the Danfoss.
    If you were a real tech, you'd solder a relay on that board and call it good to go.

  8. #7
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    Quote Originally Posted by Steph9578 View Post
    So besides mo99 as a replacement for r22 what does everyone think is the best replacement for r22?
    R-22
    Experience - knowing when to get the hell out of the way and plug your ears. "Don't be a sissy. Turn it on!"

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  10. #8
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    R407c is probably ahead of the pack for a/c applications.
    What's your application ?

  11. #9
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    When I have to replace R22 in a system repair where the compressor uses mineral oil, I use 422B with no issues. Since Trane approves of no replacement refrigerants, we use R22 for those jobs.

    If I am replacing a compressor which has POE oil, then I use R407C.
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