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honeywell smart valve

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Paul S_3
Paul S_3 Member Posts: 1,261
in THE MAIN WALL
does anybody have any info on the honeywell smart valve?.... the reason why im asking is that the gas valve has a 4 wire plug with a black,white,blue and orange wires. i know the black and white are a constant 24v, and the blue is another 24v circuit.. but i dont understand what the 4th wire[orange] is? it seems like when main gas is energized the smart valve sends 24v back to the circuit board? dont know why ....any explanations?
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  • Craig_8
    Craig_8 Member Posts: 33
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    On a forced air furnace it tells the fan timer board that ignition was successful. The fan timer then turns on the fan after the set warm up time.
  • Unknown
    Unknown
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    Paul s the answer posted is correct

    if you are interested I have for sale a complete set of manuals on Smart Valve contact me at gastc@cox.net and we will help you out.
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