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    Two system thermostats one circ (1 Post)

  • Roy Roy November 4, 2011 @ 5:56 PM
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    Two system thermostats one circ

    I have 2 systems - one a wood boiler and the second a geothermal water to water.
    There are 2 thermostats in each of 2 zones one for the wood and one for the geo. They each call the respective unit on but I need them to start the radiant circ.  They have separate transformers so I can't just wire them together I know there must be a 2 input isolated relay so I could have 1 or the other or both calling and pulling in the circulator.
    Anyone know the relay I am looking for or even if there is such a beast.
    Thanks
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