Trane Tracer Summit VAV II/III UCM Reheat Valve Water Flush
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  1. #1
    Join Date
    Nov 2009
    Posts
    163

    Trane Tracer Summit VAV II/III UCM Reheat Valve Water Flush

    Does anyone know of an easy way to globally force Trane VAV UCMs on a summit network to drive all the reheat valves open? I know there is a check box setting on one of the UCM tab pages in UCM setup, but can't find a reference value to setup as a cpl command. Otherwise, the only way I can think of how to do this is to set a cpl command to globally override the heating setpoints, then release at the same command level.

    Any better ideas?


  2. #2
    Join Date
    Mar 2005
    Location
    Georgia
    Posts
    380
    You should have a VAV calibrate schedule that I believe opens and closes the air valve and water valve during this recalibration.

  3. #3
    Join Date
    Mar 2011
    Location
    North Carolina Piedmont Area
    Posts
    447
    Are you using this for morning warm-up? It sounds like you are trying to command the hot water valve at 100% open. I know that you can control the air valve in the set up of the VAS and control the air valve to max open. This is located in the override tab and will have an option there for this set up.

    But I will have to check what will command the hot water valve.

    What type of air handler do you have and does this unit have some form of heat in it?

  4. #4
    Join Date
    Jul 2001
    Location
    maryland
    Posts
    1,355
    Quote Originally Posted by chadtech View Post
    You should have a VAV calibrate schedule that I believe opens and closes the air valve and water valve during this recalibration.
    I'm pretty sure the calibration drives both valves closed and then opens them as necessary. So if re-heat isn't necessary then it won't open the valve.
    Saving the world...one service call at a time.

  5. #5
    Join Date
    Nov 2009
    Posts
    163
    You should have a VAV calibrate schedule that I believe opens and closes the air valve and water valve during this recalibration.
    I'm pretty sure the calibration drives both valves closed and then opens them as necessary. So if re-heat isn't necessary then it won't open the valve.


    That's what I'm hoping to do - the floating reheat valves tend to get "lost", so I need to intermittently drive them open, then closed, then release to automatic control.

    Couldnt find where to set up the global valve calibration - is it in Area control or VAS?

  6. #6
    Join Date
    Jul 2001
    Location
    maryland
    Posts
    1,355
    You need to create a BOP and place it in a TOD schedule. Then reference it to the calibration point in the VAV editor.
    Saving the world...one service call at a time.

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