Zone Valve Size

blackdoglabrador Posted By blackdoglabrador, Feb 19, 2011 at 4:27 PM

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  1. blackdoglabrador

    blackdoglabrador
    Member 2.
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    Feb 19, 2011
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    Mt Holly, VT
    I just bought a tarm innova 30 and plan to have all the main piping as 1 1/4 inch dia copper as per the manufacturer diagram (attached). However the zone valve they sold me is a 1" dia honeywell zone valve. Should I be concern about putting in a small zone valve and flows? Should I return it and buy a larger 1 1/4 inch diameter taco or white rodgers zone valve?
     

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  2. ewdudley

    ewdudley
    Minister of Fire 2.
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    Nov 17, 2009
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    Where does the zone valve show up in the schematic?
     
  3. Floydian

    Floydian
    Feeling the Heat 2.
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    Dec 12, 2008
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    Loc:
    Southwestern VA
    Hello and Welcome blackdoglabrador.

    I'm guessing the zone valve in question is for your gravity overheat loop ?(B in the schematic). It shows this loop as 1" with an Automag ZV but maybe they sent you a Honeywell? In either case I believe it should be a "normally open" valve and only opens in the event of a power outage so you can dissipate heat from the boiler when the pump stops circulating.

    I am not a heating pro, so take what I have said as such.

    Good luck,
    Noah
     
  4. blackdoglabrador

    blackdoglabrador
    Member 2.
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    Feb 19, 2011
    23
    4
    Loc:
    Mt Holly, VT
    I posted the wrong diagram, and in doing so realized that I can replaced the zone valve with a weighted check (and then use the zone valve they sent for my indirect dhw circuit). There was another diagram that should a zone valve before c-1 instead of a weighted check. So I will go with the weighted check as shown in this diagram.

    http://woodboilers.com/admin/uploads/public/WoodBoilerPlumbingSchematic0111Web.pdf
     
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