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Thread: r422b trane intellipak

  1. #1
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    r422b trane intellipak

    anybody know of any issues using r422b instead of r22 on 100 ton intellipak, making leak repairs, new condenser slab, couple new compresors, rebuild txvs on circuit 2 of machine. it has csha150 scrolls

  2. #2
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    You are gonna end up with like a 80 ton unit when done but it does run and work. Fairly close to 22 numbers.

  3. #3
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    that much capacity lost ?

  4. #4
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    I have not seen any large conversion that has not lost somewhere around that. It requires a bunch more gas. I have done about half a dozen conversions over 30 ton as my reference. Someone with more experience will likely be along.

  5. #5
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    Thread Starter
    ok, thank you

  6. #6
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    Not sure if Trane has the CSHA's on the "Do not convert" list......some you can't.

    looking at the data, they are approved for 407C, and would need POE oil, so you may be ok changing those over.

    If that unit has had a bunch of compressors, be aware of the system oil charge, there may be a bunch out in the system.

  7. #7
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    thats what prompted me to ask due to maybe trane didnt approve

  8. #8
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    I did a conversion because of leaks on a 27.5 ton voyager, tandem 3D scrolls. Used 422b and killed both compressors in 4 days. There was a field installed liquid line core drier, opened it up and found metal shavings, definitely not in there when we changed the core after fixing the leaks. Clearly oil return issues.
    Bluon ( tdx-20 ) will give you the best support for a conversion. They will tell you exactly what you need to do because they have case studies of doing them on intellipaks.
    One other note we were replacing a compressor on a R-22 desert-aire, I spoke to them prior to quoting it out and they recommended that I stay with R-22 not switch to Bluon ( tdx- 20 ). I thought that was great, not just telling me to use their refrigerant.

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  10. #9
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    Yep Trane won't cover warranty if a substitute refrigerant is used with their 3D scrolls.
    Attached Images Attached Images  

  11. #10
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    If you are using 422b on the Trane 3D compressors, you have a high probability of ending up at 50% capacity due to the dead compressors.

    Read the doc attached then look near the center of the compressor label and you will likely see 3D Scroll.


    Name:  3D scrolls & 422B.png
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    I do a triple evac with nitro to remove non condensables.

    I'm feelin' a little peculiar.

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  13. #11
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    Are the CSHA's "3D" scrolls?

    In the literature for them, they can run POE

  14. #12
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    .
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  16. #13
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    Well, there you go.....proceed with caution!! LOL!!

  17. #14
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    And there we have it! Good call on the Trane info fellas... that is all new to me. Luckily, my conversions have all been Copeland or Carlyle semis. The collective input here is why this is the best HVAC forum out there!

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  19. #15
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    thanks to all

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