Wirsbo / Uponor ES switching "totally isolated"

Discussion in 'Boiler Forum' started by Tom Robinson, Mar 29, 2021.

  1. Tom Robinson

    Tom Robinson New Member

    Joined:
    Mar 14, 2021
    Location:
    SAnta Cruz, California
    I'm working with Wirsbo / Uponor zone control module that has a solid state switching output "ES"
    stated to be totally isolated. Although I see 5 millivolts between leads.

    The new Weil-McLain high efficiency boiler requires "dry contact" signal , they certainly don't want 24V. what about 5 millivolts?

    do I need to add relay or not ?

    Both manufactures pass the buck to the other and are not helpful.
     
  2. fitter30

    fitter30 Well-Known Member

    Joined:
    Feb 2, 2020
    Occupation:
    Retired service tech
    Location:
    Peace valley missouri
    Want model is the control
     
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  4. Tom Robinson

    Tom Robinson New Member

    Joined:
    Mar 14, 2021
    Location:
    SAnta Cruz, California
    Ultra High Efficiency 80
     
  5. fitter30

    fitter30 Well-Known Member

    Joined:
    Feb 2, 2020
    Occupation:
    Retired service tech
    Location:
    Peace valley missouri
    Last edited: Mar 30, 2021

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