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  1. #1
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    Jan 2015
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    Pneumatics upgrade to DDC VAV box question

    Hello-

    I have a project that involves an upgrade to DDC on a lot of old equipment, and I hoping I can install a typical DDC VAV box controller on these existing Carnes VAV boxes installed in 1996. The Carnes manufacture said that if VAV box has a damper shaft I should be good to go, but they could be too old and may contain a bladder type pneumatic actuation for the air damper.

    Any recommendations? Or things to look out for like air flow measurement? My DDC controller can do 35 " lbs for the internal actuator motor, and the Carnes recommended 50-70 " lbs. Basically they said I should be good to go even though its on low end for torque ratings..

    Any idea just by looking at this is it is an older bladder type pneumatic VAV box? In the picture further below, is the little black box next to the pneumatic VAV controller the air damper actuator?

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  2. #2
    Join Date
    Jan 2003
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    USA
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    Quote Originally Posted by HenryHub View Post
    Any idea just by looking at this is it is an older bladder type pneumatic VAV box? In the picture further below, is the little black box next to the pneumatic VAV controller the air damper actuator?
    So you install and work with controls and your asking which style box this is???

    96 and they installed pneumatics....wtf. Gonna pay for that call now from the looks of it.
    Propagating the formula. http://www.noagendashow.com/

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