Question about Aprilaire 600 Humidifier

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Aprilaire 600 valve won't open?? help

I have 24 volts going into the controller, the light is on.There is no power coming out and telling the valve to open. If I hook those wires directly to the selnoid valve it does open. (So it does work)

The only humidity/temp sensor seems to be part of the controller in back or the board and in the air duct.

Any one have some suggestion?

thanks

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  • Jeff Reynold Oct 14, 2008

    When you say "humidistat do you mean the control board? The one that controls the level of humidity...

  • Jeff Reynold Oct 15, 2008

    OH, think I get what you are suggesting: bypass the humidistat and run the wires from the hum screw and common screw directly to the seleniod valve. It will then open when the fan comes on and I can control the humidity by regulating the water. I will regulate it upstream at valve for main water supply.

    I this correct?

    Thanks for your help,

    Mike


  • Jeff Reynold Oct 18, 2008

    Did exactly what you recommended and it's works perfect! Thanks!

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Hook one wire to the hum screw on the board if there is not a hum screw hook it to the green screw,go up to the humidifier then back down to the common screw on the board that should make the unit only come on when the fan is running. it sounds like the humidistat is not working correctly

Posted on Oct 14, 2008

  • kevin in ny Oct 15, 2008

    the humidity controller is called a humidistat sorry, if that is not working properly your unit will not run

    but if you bypass it the way i said you can still controll the humidity by limiting the amount of water into the humidifier by closing the water valve a little at a time until you get the desired humidity level in your house i hope this explains better....if not let me know

  • kevin in ny Oct 16, 2008

    that is exactly what i am saying no problem for the help i do heating and air for a living

    kevin

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