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Taco isolated end switch wiring help

adavis
adavis Member Posts: 11
edited January 2017 in Radiant Heating
I am installing a taco SR502 Switching relay connected to a crown phantom boiler for a 2 zone radiant floor heating system. All thermostats and zone pumps are connected to the switching relay. The taco end switch terminals are marked X X which would be wired into TT on the aqua stat. but the low voltage terminal board on the crown boiler are marked Heat T'stat R W C, how would I wire X X into this boiler labeled RWC to fire the boiler during a heat call .

Comments

  • Ironman
    Ironman Member Posts: 6,868
    'X X"to "R W". Don't use "C".
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
    adavisRich_49
  • adavis
    adavis Member Posts: 11
    Does it matter which wire goes to X X,

    X X XX
    RW WR

    Thank you for your time
  • Ironman
    Ironman Member Posts: 6,868
    Nope. 'X X" is just a set of dry contacts.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
    adavis
  • Robert O'Brien
    Robert O'Brien Member Posts: 3,451
    The XX are cold terminals, doesn't matter. Half the people are missing C wires, the other half have them and don't need them! :)
    To learn more about this professional, click here to visit their ad in Find A Contractor.
    adavisRich_49
  • adavis
    adavis Member Posts: 11
    thank you, ironman
    Ironman
  • Ironman
    Ironman Member Posts: 6,868
    You're welcome.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • adavis
    adavis Member Posts: 11
    Thank you Robert O'Brien