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  1. #1
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    May 2010
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    Trane 800ton only loads to 80%?

    Anyone know what the probable causes to our chiller wanting to only load to 80%? We were told that the "black box" needs to be replaced. I am assuming it is the control box or a device in the control box they are referring to. Just curious Thanks

  2. #2
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    Is it controlling to setpoint? Is it controlling "on a limit"? What is the model and serial number (at least first 4 digits of serial no.) of chiller? At least what control panel it has.

  3. #3
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    Mixing oil and fire with a big spoon.
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    Quote Originally Posted by ZeroTolerance View Post
    ..."black box"...
    i will bet you that this is a clue to the age of the chiller....if so, i think that he may be disappointed.

    (PART-SVB23A-EN)
    When I am late for work, I usually make up for it by leaving early.

  4. #4
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    Yeah Jay, if that means literally "black" box, you're probably right. I wonder if any of those once available retrofits (based on ch530 parts) are still sitting on any parts shelves anywhere. Just wondering....

  5. #5
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    What's your current limit set at?

  6. #6
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    Dec 2010
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    Confused

    Ouch!!!!!!!!!!!!!!!!!!! (Black box UCP1) The retrofit kit might be half the cost of a chiller been there and done that last summer.

  7. #7
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    Mar 2004
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    ottawa canada
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    Quote Originally Posted by emcontrols View Post
    Ouch!!!!!!!!!!!!!!!!!!! (Black box UCP1) The retrofit kit might be half the cost of a chiller been there and done that last summer.
    Black Boxes are before UCP1
    If its the Black Box Im thinking off then your SOL they are obsolete long time since . Unless you know a very freindly Trane tech who kept one in his garage and has the TOL 90 to set the current calibrator .
    Is it a Classic Black panel with the gauges on the left hand side vertically .
    Time for a controls upgrade and get your wallet out and be ready for a big bill .
    The 64 roars to life Whoo hoo ...shes a rolling chassis .
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  8. #8
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    Quote Originally Posted by Healey Nut View Post
    ...If its the Black Box Im thinking...
    that was the one that I was thinking about...V1 and V2!
    When I am late for work, I usually make up for it by leaving early.

  9. #9
    Join Date
    May 2010
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    1,295
    Seriously, this thing is old. It is a base building chiller and the building was built in 1984. The current is set at 100%. It hogs power like a SOB. We are going to eventually replace it in the next year with a new VFD Trane 800ton. Just curious as to what would cause it to only run at 80%

    All I know is that it has four big vertical gauges on the far left front of the black box, about 8 vertical incandescent lights next to the gauges with white levered breakers next to them, and the current and chilled water control is a potentiometer with knobs lol. It is as old as I am.

    Yes healy, I believe you are talking about the one I am.

  10. #10
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    ottawa canada
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    Yep thats the one mid 80s Classic Black panel . All obsolete non available parts .
    It could be that the current limit potentiometer is dirty , it could be short of gas , the low evap temp control needs calibrating etc etc .
    You question is way to vague to answer without a full set of accurate readings and even then its a crap shoot .
    you need an experienced Trane tech who is familiar with the older control panels and the black box in the starter to tell you whats wrong with it .
    The 64 roars to life Whoo hoo ...shes a rolling chassis .
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  11. #11
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
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    I was actually thinking of the solid state overload in the starter for this chiller. I was wondering why I was the only one standing at the starter, while the rest of ya"ll are at the control panel! Not all Trane techs will be familiar with troubleshooting this model. I suspect many newer ones may not be familiar with the special tools required. I know some aren't even aware they exist (the tools, that is).

  12. #12
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    May 2010
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    Luckily another one of our buildings has a spare control box they are going to put on for the time being. At least until we get our new Trane VFD 800ton Chiller.

  13. #13
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    Exclamation

    Quote Originally Posted by ZeroTolerance View Post
    Luckily another one of our buildings has a spare control box they are going to put on for the time being. At least until we get our new Trane VFD 800ton Chiller.
    If your talking about the black box in the starter, it is calibrated to the specific chiller it came from. You better make sure it had the same RLA.

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