Pilot Wire Control for Heaters

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  • ROF
    Automated Home Lurker
    • Jul 2005
    • 1

    Pilot Wire Control for Heaters

    Does anyone know the signals used on the Pilot wire heater control system. I know they are 240 volt low current but would like to know how they are implemented.

    I have found that the Electric heater control signal can be 4 or 6 different flavours.
    No signal is on, half wave negative is frost setting, half wave positive is off, full wave is eco setting (3 or 4 degrees lower).

    The other two I can't find a good explanation any body know how they work?

    I'm trying to implement a computer controlled system for my electric heating system and using the pilot wire saves using power relays.
    Last edited by ROF; 23 March 2007, 10:23 AM. Reason: update
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