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How to power multiple zone valves

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Al Corelli
Al Corelli Member Posts: 454
in THE MAIN WALL
I asked this question not even a week ago. I was told that up to 4 thermal heads can be multiplexed onto one "zone".

Comments

  • hot_rod
    hot_rod Member Posts: 26,579
    on a radiant manifold for example

    I use the Taco zone control module. On one zone I have 3 loops with heat type actuators. Can I power 2 or more actuators from one Taco connection? Or better to custom build a transformer and relays?

    hr
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • jp_2
    jp_2 Member Posts: 1,935
    second guess?

    taco should provide amperage & voltage data on the contacts, I hope? this IS standard other places.....
  • hot_rod
    hot_rod Member Posts: 26,579
    I see the 80VA

    worth of transformer on the 6 zone controller. And I know the current draw of the actuators. I wasn't sure how many actuators could go on one set of terminals below the t-stat connections.

    hr
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • jp_2
    jp_2 Member Posts: 1,935
    i'm planning to

    use an Omron ZEN programmable relay, taco should look out !

    gives me more flexibility.
  • Darrell
    Darrell Member Posts: 303


    I've been told by the Taco Rep, and have done so successfully, to jump the related t-stat contacts, observing polairity, on the Taco ZVC so that one t-stat will operate miltiple zonevalves or actuators. No resistors or other magic is needed and the anticiaptor on the T-stat can be set as you would for a single zone valve.

    I have to do this frequently when small zones don't get along and turn each other off. I pick a more centrally located T-stat and make it the operative control for multiple small zones.

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