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  1. #1
    Join Date
    Jul 2012
    Location
    Greenville SC
    Posts
    1

    titus vav box heat issue

    im new to the vav game< i have a titus vav box, non fan powered 3 stage heat, controller is calling for 100% heat, no control voltage to contactors. line voltage is there and transformer is good. my question is: does the control board send signal to the transformer to on the secondary side to power the contactors. all the safetys are made but still no power? i guess I'm asking how does the controller send the call to the transformer?

  2. #2
    Join Date
    Jul 2003
    Location
    Orange County N.Y.
    Posts
    1,176
    It doesn't send a call to the transformer. The BMS system sends a signal to a control, the control sends a signal to a relay, which closes a set of points, which activate something. Transformers are usually in VAV boxes to power whatever board the operating system uses.

    I read your post as the controller (VAV box) not communicating with the BMS.

    ...Ron
    Roof Rat

  3. #3
    Join Date
    Dec 2010
    Location
    Downingtown, PA
    Posts
    5
    This is the Ask Our Pro's forum. In order to post a response here, you must have verified qualifications and have been approved by the AOP Committee. You may ask a question by starting a new thread.

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    Last edited by jpsmith1cm; 12-13-2012 at 05:47 AM.

  4. #4
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,777
    captaincallback

    This is the Ask Our Pro's forum. In order to post a response here, you must have verified qualifications and have been approved by the AOP Committee. You may ask a question by starting a new thread.

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