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  1. #1
    yair be's Avatar
    yair be Guest

    Red face bitzer screw compressor fault



    Dear friends
    Why is the suction pressure rises with bitzer screw compressor starting.
    This is a freez compressors rack for supermarket application.
    When closing the tap down the compressor suction goes to vaccum.
    thanks
    yair



  2. #2
    Join Date
    Sep 2011
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    Re: bitzer screw compressor fault

    Right rotation?

  3. #3
    yair be's Avatar
    yair be Guest

    Re: bitzer screw compressor fault

    Quote Originally Posted by Coorsman777 View Post
    Right rotation?
    yes the rotation right.
    also i can say that the compressor has been worked in right condition for a 500 hr with out eny fult. and the oil prssure was right to.

  4. #4
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    Re: bitzer screw compressor fault

    May be he doesnt loading?

  5. #5
    Join Date
    Mar 2006
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    Re: bitzer screw compressor fault

    Internal safety valve leaking from high to low side.

  6. #6
    yair be's Avatar
    yair be Guest

    Re: bitzer screw compressor fault

    dear friend
    the safty valve is new we replace it .
    we steel have the problem.
    thaks,
    yair

  7. #7
    yair be's Avatar
    yair be Guest

    Re: bitzer screw compressor fault

    dear friend ,
    I checked and it looks normal unloading.
    anyway on Starting there is a trend of moving high pressure towards the suction pressure .
    thanks,
    yair

  8. #8
    Join Date
    Mar 2006
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    Merate (LC) - Italy
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    Re: bitzer screw compressor fault

    You've still got a bypass somewhere. Sometimes is installed on purpose to reduce the inrush current.

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