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Hardy Outdoor Wood Boiler Wiring

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I am needing a diagram as to the indoor wiring for the relays. According to Hardy diagram, the yellow wire is not being used. Will need this for cooling. I am using a 2 stat without an aqua stat. I am needing to know how to wire this using the relays. Any suggestions would be helpful. Thank you.

Comments

  • GroundUp
    GroundUp Member Posts: 1,938
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    What relays? Do NOT run the circ pump on heat call like they want you to- run it 24/7.
  • awhistle
    awhistle Member Posts: 2
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    There is a blower and control relay that need to be wired. I am wiring up an ac and furnace through relays. On the original stat, there is W for cooling but not specified where this should be hooked up to which terminal on the relay. I am using a 2 stat system without an aquastat. This why I recommend people not to use Hardy wood boilers. No other wood boiler has ever caused this many issues and is simple to hook up.
  • 109A_5
    109A_5 Member Posts: 1,388
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    Hello @awhistle,

    Is this what you are trying to do ? See PDF page 37 - 39 or manual page 23 - 25. Or are trying to expand from this ?

    http://www.hardyheater.com/Pdf/H2 - H5 Manual.pdf

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • GroundUp
    GroundUp Member Posts: 1,938
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    The indoor wiring has nothing whatsoever to do with the wood boiler. Run a constant circ from the Hardy through the HX. Wire your second thermostat to the blower (most are W/G) and leave the existing thermostat wiring alone. Done deal.