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  1. #1
    Join Date
    Oct 2001
    Posts
    2,096
    why low pressure gauge on R-11 chiller would
    go from 14"Hg to O and back to 14" in about 10 seconds?
    After seeing it twice I decided to find out what was going on.
    It didn't take to long to get the answer.
    I will give you only one clue:
    Nothing noticeable different was happening in operation of the chiller during this event. No change in sound of the motor and no change in amp draw.

  2. #2
    Join Date
    May 2005
    Location
    Calgary, Alberta, Canada
    Posts
    92
    Was the building operator playing with some valves??
    Yes we have air conditioning in our igloos.

  3. #3
    Join Date
    Oct 2001
    Posts
    2,096
    Originally posted by websy
    Was the building operator playing with some valves??

    No. Water flow was always the same.

  4. #4
    Join Date
    Jan 2001
    Location
    So.Cal
    Posts
    441
    oil slugging

  5. #5
    Join Date
    Oct 2001
    Posts
    2,096
    No oil slug.

  6. #6
    Join Date
    Jan 2005
    Posts
    604
    What was the chilled water temp at the time?

  7. #7
    Join Date
    Oct 2001
    Posts
    2,096
    I think that chilled water was somewhere around 44 deg.

  8. #8
    Join Date
    Feb 2005
    Location
    Dothan, Al
    Posts
    3,453
    What was the delta 't' ??

  9. #9
    Join Date
    Oct 2001
    Posts
    2,096
    Originally posted by bornriding
    What was the delta 't' ??

    10 degrees.

  10. #10
    Join Date
    Jan 2005
    Posts
    604
    What type of chiller?
    Oil differential pressure guage/switch leaking through?
    Trapped liquid in gauge line?

  11. #11
    somebody stepping on your hose as they marched by your work site?

  12. #12
    Join Date
    Oct 2001
    Posts
    2,096
    Originally posted by R12rules
    somebody stepping on your hose as they marched by your work site?

    LOL

    Evaporator gauge is installed on the control panel along with condenser and oil pressure gauges.

    R718 is right. These changes in evaporator gauge reading were caused by momentarily presence of liquid refrigerant in a gauge line.
    The question is; how this liquid was getting in there?

  13. #13
    Join Date
    Jan 2005
    Posts
    604
    Sigma,
    Does this occur constantly while chiller is running, or just after start up and eventually quits?

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