Nest & Honeywell Enviracare HE365B Wiring

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  #1  
Old 03-01-13, 08:24 AM
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Nest & Honeywell Enviracare HE365B Wiring

Hello All-

I have search through the forums and haven't been able to find a good wiring diagram for my set up. I have the Honeywell Enviracare HE365B with the automatic humistat which just died. I want to utilize my new nest to control it, and from all the wiring diagrams have seen, non match the wiring set up that i have, so i am posting in hopes someone can help me.

From what I have been able to find, it seems that I will need to purchase the 6AZU2 fan relay, but wiring with my set-up is different so i could really use some help and I don't want to wreck anything.

Attached to this post is how it is wired currently.

Thank you all in advance. This forum is great and has helped me out immensely.

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Old 03-02-13, 05:35 AM
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Yes, you will need the relay.

You will use the two wire from the HUM on the old humidistat over to the contact side of the relay.

The 24v (red wires) will no longer be used, so cap/tape those off.

The wires from the stat side will not be used anymore.

Wires from the Nest will go right to the furnace board.


Then * from Nest will go to one side of the coil side of the relay, and other side of the coil side of the relay goes to C.
 
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Old 01-27-15, 10:45 AM
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Stat Side

I get what is happening on the humidifier side, but lost on the stat side. My Nest terminals used are Y1, G, W1 & RH. Please see below.

1. What wires go from Nest to board and where on board? I'm assuming you mean the connections listed above?
2. The other side of coil relay goes to C on stat?
 
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Old 01-27-15, 11:14 AM
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Welcome to the forums.

Do you have the same HE-365B humidifier ?
 
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Old 01-27-15, 11:19 AM
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Yes - the full model name is HE365B1004.
 
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Old 01-27-15, 11:42 AM
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Thanks. This diagram should be what you need.

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Old 01-27-15, 12:19 PM
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Thanks a bunch PJ! I assume 14ga wire is fine? One last question and I may not recall it correctly...I think there were several wires running from the humidistat to the furnace?
 
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Old 01-27-15, 12:43 PM
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#18 is fine. #14 is a tad heavy.

You may have an automatic humidistat there..... you will no longer need it.
Make sure to remove or safe off unused wiring.

The wiring diagram illustrates all the connections needed.

Just for my own curiosity.. how many wires are coming out of the humidifier and what colors are they Don't count the AC power cord.
 
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Old 01-28-15, 06:08 AM
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Hey Pete - here is a picture of the stat. The right side is furnace and left is humidifier, but then you would probably already know that. Hahaha. Thanks again, Jeff
 
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Last edited by jeffko; 01-28-15 at 07:02 AM.
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Old 01-28-15, 10:48 AM
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Thanks.... but to take it one step further.... I'm looking for the actual humidifier colors.
Some of the diagrams I'm looking at have different colors and I'm trying to figure out why ?

green ---> yellow
blue ---> yellow
red ---> ?
white ---> ?
 
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Old 01-30-15, 07:35 AM
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Well Pete, I'm sure hoping this helps you. My red & white connect to red & red at the humidifier. I hope the picture will be clear.
 
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Old 01-30-15, 08:48 AM
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Thanks for the additional info.
If you remove the extra wiring from the humidifier.... make sure the red wires are capped off.
 
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