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One pump two mixing valves

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by Rick S., Apr 17, 2012.

  1. Rick S.

    Rick S. Member

    Joined:
    Feb 11, 2012
    Messages:
    29
    Loc:
    Northeast Indiana
    I just switched from an ahs coal gun to an ahs e-140. The boiler works as planned, but I can't enough water to circulate through the radient floor pex. All the air has been bled from the pex in the floor so I don't have an air lock. I have the same circulater pump[Grundfos 15-42F] that I used with the coal gun and it worked just fine. I now have two mixing valves[Honeywell am-1 series] and only had one with the coal boiler. Do I have a big enough pump to handle two mixing valves? All plumbing between the boiler and the floor manifold is 1 inch copper. The pex in the floor is 1/2 inch, about 2200 feet.

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  2. BoilerMan

    BoilerMan Minister of Fire

    Joined:
    Apr 16, 2012
    Messages:
    1,490
    Loc:
    Northern Maine
    Can you give a diagram of what you have, sounds similar to a system I put in with a pellet boiler. I used a Watts 1170. I used a Taco 008 for the circuits, 300' 1/2 loops.

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