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Discussion Starter #1
hello
how do i connet humidifier to CONFORMAKER RPJ II FURNACE
to come on only when the blower comes on?
i have connect one wire to a C terminal and the other wire to Y and it works but it kiks on when call for heat and shuts of when the burns is off.

my furnace model GUI125a020in there is no HUM connecter
thanks


JP
:(
 

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Get a 120v to 24v transformer. Connect to 120 side to a spade terminal labeled EAC and the other one to a spare Neutral terminal. Then connect the wires from your humidifier to the 24v side of the transformer. The EAC terminal is energized whenever the fan is on but it is 120v that's why you will need the transformer
 

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Discussion Starter #3
humidifier 800d

hello
I couldn't find the The EAC terminal, i don't think my control board have it
thanks
JP
 

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Discussion Starter #4
hello
I couldn't find the The EAC terminal, i don't think my control board have it
thanks
JP
 

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Discussion Starter #6
humidifier connection

hello
i don't have HUM or EAC on my confortmaker furnace
how can i connect humidifier to come on only when the blower is on
i try C terminal and W is working but shuts down when the burner goes off.
some help please :(
 

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Discussion Starter #7
Sammy
iI have programable thermostat but i only have two wires connect to it
i was wondering if thta will do it, there is an extra wire there
JP
 

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hello
i don't have HUM or EAC on my confortmaker furnace
how can i connect humidifier to come on only when the blower is on
i try C terminal and W is working but shuts down when the burner goes off.
some help please :(
You have to do what I mentioned above. For instance, the Aprilaire automatice control can be wired to turn the fan off and on with a call for humidity. It will require you to use a seperate transformer and also has an outdoor sensor.
Or you can buy a new thermostat that has a humidity feature and wire the humidifier into it and you wouldnt need the seperate transformer. The thermostat would give you the option in the installer menu to either have the humidifier run on a call for heat, or it could be set to run the fan and humidify on a call without heat also.
 

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If you buy the aprilaire control, it wouldnt matter what you have running to your exisiting stat but you would need to run two wires between your furnace and the Aprilaire control. One would be connected to the C terminal and one would be connected to the G terminal. You would also need to use a seperate transformer
 
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