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Resideo HPSR10 switching relay panel

egnuol
egnuol Member Posts: 13
in Thermostats and Controls

What is the purpose of the boiler terminals ? Do they send 24vac to the boiler plug-in relay to activate the boiler or are they a continuity contact? Thanks

Comments

  • pedmec
    pedmec Member Posts: 1,055

    Boiler terminals are dry contacts and are just a switch to turn the boiler on. anytime one of the zones call for heat the switch closes sending voltage back to the boiler circuit.

  • egnuol
    egnuol Member Posts: 13

    Thanks pedmec. That will help alot.

  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 9,269

    To be just a little more clear

    Boiler terminals are dry contacts and are just a switch to turn the boiler on. anytime one of the zones call for heat the switch closes allowing voltage to go back to the boiler circuit.

    But I think you got the point

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • egnuol
    egnuol Member Posts: 13

    Yes, thanks for the help. I have been looking on line for information on this. Should have looked for the experts here first.

  • 109A_5
    109A_5 Member Posts: 1,566

    Hello egnuol,

    Installation Instruction manuals here if you need more information.

    https://www.resideo.com/us/en/pro/products/water/hydronic-solutions/controls/four-zone-switching-relay-120-vac-1ph-hpsr104-u/#resources
    https://digitalassets.resideo.com/damroot/Original/10014/33-00349EF.pdf
    https://digitalassets.resideo.com/damroot/Original/10014/33-00331EF.pdf

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • egnuol
    egnuol Member Posts: 13

    Thanks 109. I wasn't sure about the boiler and end switch purposes.

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