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  1. #14
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    May 2003
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    Perhaps a dual temp application.

    Low temp operation: Booster on, and 3 way valve flows from evaporator outlet to Booster suction

    Med temp operation: Booster off, and 3 way valve is energized, allowing flow from evaporator to bypass booster and directly enter the medium temp suction.

  2. #15
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    Mar 2015
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    Medford, N.Y.
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    What is that lower comp discharge press while feeding its discharge into the suction of the two upper comps?

  3. #16
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    Jul 2018
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    Wouldn't EPRs be used in this situation?

    Sent from my SM-G960U using Tapatalk

  4. #17
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    Jul 2000
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    Guayaquil, EC
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    Quote Originally Posted by TechmanTerry View Post
    What is that lower comp discharge press while feeding its discharge into the suction of the two upper comps?
    The discharge pressure of the low stage compressor would be the same as the suction pressure of the high stage compressors. That's also called the interstage pressure.

  5. #18
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    Jul 2000
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    Guayaquil, EC
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    Quote Originally Posted by Spitz View Post
    Wouldn't EPRs be used in this situation?

    Sent from my SM-G960U using Tapatalk
    Do you mean use EPRs on the two medium temperature evaporators and eliminate the low stage compressor?

  6. #19
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    Jul 2018
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    Wisconsin
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    Yes

    Sent from my SM-G960U using Tapatalk

  7. #20
    Join Date
    Jul 2000
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    Quote Originally Posted by Spitz View Post
    Yes

    Sent from my SM-G960U using Tapatalk
    You could do that, but then the remaining compressors would need to run at a -18°F suction temperature. That would require bigger compressors and more horsepower...ie, not a very efficient way to go.

  8. Likes Spitz liked this post
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