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  1. #1

    Confused Wiring of two-zone system not working correctly

    I am having issues with my heating system. I have attached a diagram. Here's what happens: When T-Stat for Zone 1 turns on, it starts the boiler, opens the damper and turns on the pump. (Obviously this is fine). When T-Stat for Zone 2 turns on, the boiler starts, the damper opens and BOTH pumps turn on. (Obviously I only want pump zone 2 to start). The way it is wired now, it applies 24 volts from T-Stat 2 to the exact same terminals that T-Stat 1 is connected to. So when that happens it is like T-Stat 1 turns on and thus starting the Zone 1 pump.
    By looking at the diagram, could someone tell me or show me with another diagram how this system should be applied so that each zone works independently of each other but both start the boiler and open the damper.
    PLEASE HELP. Thanks.
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  2. #2
    Join Date
    Jan 2007
    Location
    vermont
    Posts
    581
    You could install a 2 zone Taco zone valve controller and let the end switch operate the boiler and damper, thereby isolating the T stats, shouldn't be too bad $ wise

  3. #3
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,002
    Quote Originally Posted by bluestone View Post
    You could install a 2 zone Taco zone valve controller and let the end switch operate the boiler and damper, thereby isolating the T stats, shouldn't be too bad $ wise
    And that's about as much advice as we can give on this forum. As you are a homeowner, the forum rules prohibit members from providing DIY instructions.

    You'll need to call a professional to diagnosis and correct the wiring deficiency.
    Perhaps you should have read the instructions before calling.

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