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  1. #1
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    Discharge Pressure High in Ammonia System



    Hi All, I'm new here
    And my first post is about troubleshooting in ammonia refrigeration
    So here's the thing
    The system i'm working on is ammonia refrigeration system from 98
    The issue right now is high discharge pressure, sometimes it could reach 17.5 barg in compressor in sensor, which is very high. One thing that i found out are piping from condensor to thermosyphon are cool, from thermosyphon there is 2 way, to high receiver and oil cooler, but somehow the piping to HR are kind of hot
    The System using Mycom Compressor
    N2520 : 2 unit
    N2016 : 1 Unit
    N1612 : 3 Unit
    N160L : 2 unit
    With Condensor Evapco PMC 631 : 2 Unit and PMC 536 : 1 unit
    Where do i start to reduce the pressure issue, because any modification will required budget approval and takes time. I've got information about balancing line from High Receiver to Inlet line should be open, is it wrong? Because the Location are in Indonesia and we have no winter here

    I will try to provide any information required

    Thank you very much



  2. #2
    Join Date
    Dec 2007
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    australia
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    Re: Discharge Pressure High in Ammonia System

    Hi Ripjaws,
    Yes balance line should be open.
    Does system have automatic air purger, is it working & purging from each condenser drain?
    Do all condenser water sprays & fans work?
    Are your ammonia level Goodwin ALl Vessels& high pressure liquid receivers

  3. #3
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    Re: Discharge Pressure High in Ammonia System

    [QUOTE=RANGER1;331506]Hi Ripjaws,
    Yes balance line should be open.
    Does system have automatic air purger, is it working & purging from each condenser drain?
    Do all condenser water sprays & fans work?
    Are your ammonia level Goodwin ALl Vessels& high pressure liquid receivers[/QUOTE

    Hi Ranger1
    My balance line are open but is that any rule for balance line? Because 2 of 3 balance line connected to Inlet Evapco, and the other one to outlet evapco

    The system doesn't have automatic purger, only manual purger and purger point are from high Receiver and Balancing line from evapco (singel purger). I try touch the purger and it was very cool, I will update with purger photo and SLD purger soon

    All Condensor water and sprays work normal
    Ammonia pressure normalh

  4. #4
    Join Date
    Dec 2007
    Location
    australia
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    Re: Discharge Pressure High in Ammonia System

    Ripjaws,
    Any chance of a P&ID of pipework, or sketch obviously condenser, purge lines etc.
    Last edited by RANGER1; 28-09-2021 at 05:23 AM.

  5. #5
    Join Date
    Jan 2006
    Location
    Croatia
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    68
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    Re: Discharge Pressure High in Ammonia System

    Seems problem solved ....

    It's impossible to make anything foolproof because fools are so ingenious...

    Don't ever underestimate the power of stupid people when they are in large groups.

    Please, don't teach me how to be stupid....
    No job is as important as to jeopardize the safety of you or those that you work with.

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