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Thread: Water problems

  1. #1
    Join Date
    Jan 2013
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    Dyersburg, TN
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    Confused Water problems

    I am having trouble with two 30ra30 chillers that are twinned together. I am getting mode 9 Slow Change Override and mode 26 Short Loop Override.
    I believe i have a water issue. The machine has a design of 65.3 gpm and 12.6 feet head. I am get a PSI difference at chiller of 10 psi with is 23.06 ft of feed. Would that mean i am moving too much water because the heat exchanger is redistricted the large amounts of water coming in. This is a Bronze plate heat exchanger. I have been battling this problem for a while now. All help is greatly appreciated.

  2. #2
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    Did you happen to check the chilled water strainers?

    Do you have an operational log of the machine?

  3. #3
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    Yes i have i check the strainers, i have a little bit of a water problem since start up date. No i dont have a log.

  4. #4
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    Does it make set point it must since you have mode 26 . How about the water volume ?

    What is the water delta T when the units are running?

  5. #5
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    I have a Delta T any where from 7-11. Not for sure about the water volume? How should i check to get that

  6. #6
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    You might want to try to valve off the lag chiller and see if that helps your flow to your AHU's.

  7. #7
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    What is the average pressure drop of a cooling coil?

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