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Wiring Honeywell Evohome Relay to Bulex 2530a Thermostat: RT vs B.Off Terminals

Raphael33 48 0
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  • #1 21713940
    Raphael33
    Level 1  
    Hello
    I have Bulex thermostat 25/30a in the house, the question concerns about re-wiring with RELAY.

    I want to use Honeywell Evohome Heating Control but it needs relay connection. I am confused where to connect to relay.

    RT, B.off OR Bus? But is currently connected with Bulex's main screen in the living room. I am thinking either RT or B.Off

    White Honeywell relay with two buttons and LED indicators on the housing

    Close-up of thermostat circuit board with B.off, RT, 24V, and BUS terminals


    Thank you in advance
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