zone damper problem - http://www.hvacmechanic.com/ Forums
Original message
| presscold
 |  "zone damper problem"
, posted Sun 10 Feb 13:00  
I got two power open/closed dampers hooked up to honeywell EMM3
zone control.
problem is every zone damper works okey with its own t-stat and othet damper is completely ealed and good.But when other t-stat calls for other zone suddenly previous operating open damper closes and none of them stay open !! but led indicator shows dampers are open which it has to be true because there is 24 volt at M1 and M6.
the point is that ,this two zone system which doesnot requires bypass damper and all new install has to do this.
Can be something related to end switches or not.
Any help will be appreciated. All wiring is ok and checked many times.
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Replies:
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| answer
| "Re(1):zone damper problem" , posted Sun 10 Feb 16:59
i would check the transformer running the zone board. each 24V transformer only has so much power, if one transformer is running all your equipment, there should be a second running the zone and the zone transformer should be a 75 VA not the weaker 40VA.
Be good to your fellow man not nice there is a difference.
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