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Thread: R-507 high temp

  1. #1
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    Mar 2010
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    R-507 high temp

    I have a 30ton chiller used to cool welders they have an R-22 System now and want to go to R-507. Im not sure why yet but one of the Engineers read about doing this overseas. And my question is my suction temp is usually around 65 and I use R-507 in low and med temp applications but has anyone tried it as a high temp refrigerant.

  2. #2
    Join Date
    Feb 2007
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    Northern NJ
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    I have never heard of 507 being used as a high temp refrigerant. Maybe he meant 407, which is commonly used as an r22 alternative. 507 running a 40 degree suction temp would be 90 psi. I couldn't imagine the compressor liking that too much.

  3. #3
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    Jan 2009
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    I sure you already did this but did u use aPT chart

  4. #4
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    Mar 2010
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    I talked to them about 407C as an alternative but they are stuck on 507. I have heard of velocity issues at that high of suction pressure and temp. I am not afraid to try to use this but want all info i can get ahead of time. And i am aware that the oil and txv's must be changed the compressor is rated for both 22 and 404 so no problems there. The comp originally had POE but someone has a sticker labeling it with a AB MO blend in the system.

  5. #5
    Join Date
    Aug 2006
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    Mixing oil and fire with a big spoon.
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    there may also be electrical changes (wire sizing, breakers, fuses, etc)...as well as pressure reliefs, perhaps some tubing size changes (that depends on a lot of factors)

    is the barrel rated for the higher pressure? some are not.

    why change away from 22?
    "I got both hands on the wheel
    And my big foot on the gas"....Chickenfoot

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