Honeywell HE 225 and H8908 correct wiring to furnace?

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Old 11-17-14, 10:30 PM
J
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Honeywell HE 225 and H8908 correct wiring to furnace?

First time posting here.

I have the HE225 and H8908 installed on my furnace.

Please tell me if they are wiring correctly.

H8908


Wiring at the back. The red wire is splice open to connect to the 8908.


The 24V transformer underneath the 225


The wiring to the furnace main board. The white wire is connected to the "C" terminal and the red wire is connected to the "R" terminal.


When I turn up the dial on the 8908, I can hear the "click" and the water will start flowing even the heat is not on. Is that normal?

I also have the Nest 2.0 and would like to connect the humidifier to it. How do I do it?

Thanks.
 
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Old 11-17-14, 11:12 PM
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Welcome to the forums.

You have the humidistat connected to always live power. That's not good.

It would be very easy to use the nest. In your third picture.... you show the water solenoid valve. You need to connect one of those blue wires to the C terminal and the other blue wire goes to the * on the nest. That's it.
 
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Old 11-18-14, 05:51 AM
J
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Thanks for your quick reply.

I need to run the wire to the Nest first before I can take out the humidistat (I am connecting the Nest with a 4-wire configuration now). In the meantime, is there a simple fix to this connection method so the humidifier is not always connected to the live power?
 
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Old 11-18-14, 07:39 AM
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Simple fix.... don't know. If you post the part number for that control board or the make and model of the furnace.... I could check further.
 
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Old 11-18-14, 08:36 AM
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It's a Lennox ML193UH furnace.

Thanks.
 
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