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Do vent dampers need constant 24 volts at all times?

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Dairon421
Dairon421 Member Posts: 80
in THE MAIN WALL
Help with troubleshooting

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  • mikeapolis
    mikeapolis Member Posts: 46
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    What brand and model of dampers do you have?
  • Dairon421
    Dairon421 Member Posts: 80
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    GVD-5 MODEL
    FIELD CONTROLS
  • mikeapolis
    mikeapolis Member Posts: 46
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    Looks like it gets 15 seconds of 24v power on and power off. Shouldn't have any voltage once it's opened or closed. Are you having issues with the damper?
  • hot_rod
    hot_rod Member Posts: 22,158
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    I suspect they have voltage all the time and an end switch breaks the circuit when the vent is opened? Either that or the motor stalls like spring return zone valves do.
    If it has 4 or 6 wires it is probably powered open and closed, two conductors for an additional switch. So power to the valve but not necessarily the motor?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    mikeapolis

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