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  1. #27
    Join Date
    Jun 2013
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    11
    Quote Originally Posted by traneguy123 View Post
    sounds like you have a couple problems. your saturated condenser temp is too high for 80 degree ambient. all your fans working? coils clean? bet your coils are dirty. need to check gpm through evap, quite possible a flow issue, maybe fouled tubes. is it a closed loop? any inhibitors or treatment in water? are your pressures and temps the same on both circuits? level sensor on both circuits steady? do a pumpdown on chiller and checked operation of level sensors, quick and easy to do.
    I will start cleaning the coils better, believe that is part of the problem, the point is that this chiller have not maintenance at all for while, GPM are OK according, unit is outdoor, water is treated, It is running one circuit only and level sensor is steady, after clean the coils well, will check and second will be the pumpdown

    Thank you

  2. #28
    Join Date
    Jun 2013
    Posts
    11
    Quote Originally Posted by R123 View Post
    Also, what's the EXV position running at full load? Whats your discharge superheat at full load? What happens to the liquid level when you pump it down? Which sensor did the Trane tech say needs to be replaced? Why are you doubting your Trane tech?
    At full load half way close, the sensor that still steady is the refrig liquid level sensor, No I am not doubting the tech, thank yopu for your help

  3. #29
    Join Date
    Jul 2007
    Location
    The Hot South
    Posts
    1,336
    If you pump it down, the level should go to -1.0 and if you run chilled water through the chiller with the opposite circuit running and manually drive open EXV, the level should go to +1.0. This would be a good test for the level sensor.

  4. #30
    Join Date
    Jun 2013
    Posts
    11
    Quote Originally Posted by R123 View Post
    If you pump it down, the level should go to -1.0 and if you run chilled water through the chiller with the opposite circuit running and manually drive open EXV, the level should go to +1.0. This would be a good test for the level sensor.
    After this test found that the sensor is not working, it is static on +0.3 no up no down

    Thank you for your help

  5. #31
    Join Date
    Oct 2010
    Posts
    28
    which sensor? (liquid level sensor)

  6. #32
    Join Date
    Jun 2013
    Posts
    11
    Quote Originally Posted by gbrlgms View Post
    which sensor? (liquid level sensor)
    Yes, Liquid level sensor
    Any Other idea??
    Any other reason that cause it be static (+0.3 no up / no down)on or off is the same

    Thank you

  7. #33
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
    Posts
    4,461
    Quote Originally Posted by ncctech View Post
    ,,,Any other reason that cause it be static (+0.3 no up / no down)on or off is the same...
    it could be a bad LLID but you would still have to change the whole sensor to fix that too since they are the same part. even if you had a mechanical issue, you should see some movement in the level....unless you were at the ends of the sensor range (which you are not).
    How to make the perfect "Half-Hitch" knot or any other boyscout knot in 3 easy steps...

    1. Remove your meter leads from the meter and very carefully return them to their storage case or bag.
    2. Wait 2 seconds
    3. Very carefully remove your meter leads from their storage place and enjoy your new knot!

  8. #34
    Join Date
    Jul 2007
    Location
    The Hot South
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    1,336
    If you have the old style with mechanical float and external LLID, you will be upgrading to the new style capacitance level sensor with integrated LLID.

  9. #35
    Join Date
    Oct 2010
    Posts
    28
    so,did you replace the sensor already!

  10. #36
    Join Date
    Jan 2009
    Location
    Not in Iran
    Posts
    1,106
    Hope not too silly of a question


    Number one. How does somebody know exactly what the percentage of Glycol in the system is.?

    Number two if there is a lot of oil, and the system is overcharged oil, does this make the discharge superheat go up or down? It's slipped my mind?.
    no signature blast'em man blast'em
    !!!KILL THE TERRORIST!!!

  11. #37
    Join Date
    Jul 2007
    Location
    The Hot South
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    1,336
    Quote Originally Posted by milkyway View Post
    Number one. How does somebody know exactly what the percentage of Glycol in the system is.?
    You use a refractometer and it will tell you the exact percentage.

    Quote Originally Posted by milkyway View Post
    Number two if there is a lot of oil, and the system is overcharged oil, does this make the discharge superheat go up or down? It's slipped my mind?.
    on an RTAC, it makes it go down.

  12. #38
    Join Date
    Jan 2009
    Location
    Not in Iran
    Posts
    1,106
    Thx again 123

  13. #39
    Join Date
    Jun 2013
    Posts
    11
    Quote Originally Posted by gbrlgms View Post
    so,did you replace the sensor already!
    Yes, sensor has been replaced
    Also change all filters and strainers.
    Unit is up and running like a baby

    Thank you everybody for your support

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