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R845A Switching Relay

Vince5
Vince5 Member Posts: 3
edited October 2023 in Gas Heating
Hello all,
My circulator pump is not getting 120 v I have 24 v at T. When I manually push the relay on the transformer I get voltage and the circulator and boiler started any ideas?

Comments

  • HVACNUT
    HVACNUT Member Posts: 6,334
    If you get 24 volts at TT with the thermostat turned up, then it's either a bad thermostat or a broken wire. 
    With the thermostat calling for heat, you should read 0 volts at TT. 

    Vince5
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,488
    Shut the power off to the relay and disconnect both thermostat wires to T & T.

    Turn the power back on and check for 120volts at #! &#2.

    If you have power at 1&2 use a jumper to jump between T & T.

    If the relay pulls in and starts the boiler and circulator when jumped it is probably good. If the relay does not pull in it is bad.

    You can get a new one at Supply House.com
    Vince5
  • Vince5
    Vince5 Member Posts: 3
    I thought about it last night after I starting pulling and testing wires I had work done in the house I bet they carpenters clipped my T stat wire from that zone. Thank you,

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