Install Honeywell HE360A in Carrier 58MCB
#1
Member
Thread Starter
Join Date: Nov 2007
Posts: 3
Received 0 Votes
on
0 Posts
Install Honeywell HE360A in Carrier 58MCB
I purchased the Honewell HE360A humidifier with the H8908B humidistat control. My furnace is a Carrier model 58MCB. Based on my setup, this is what I know:
-The two red leads coming from the humidifier should be ingnored.
-Only the two yellow leads from the humidifier will be wired.
-I have a single terminal labeled HUM (24 VAC) on the furnace circuit board.
-I have two black leads coming from the humidistat control.
How do I wire the humidifier/humidistat? I belive I need to wire my humidistat inline with the HUM terminal. On the 4wires from the HE360A there is a label saying "Do not apply power to these.
Your help is appreciated!
-The two red leads coming from the humidifier should be ingnored.
-Only the two yellow leads from the humidifier will be wired.
-I have a single terminal labeled HUM (24 VAC) on the furnace circuit board.
-I have two black leads coming from the humidistat control.
How do I wire the humidifier/humidistat? I belive I need to wire my humidistat inline with the HUM terminal. On the 4wires from the HE360A there is a label saying "Do not apply power to these.
Your help is appreciated!
#2
on your board, look for EAC1 and EAC2.. Run a wire on that to an outlet you mount on the side to plug the humidifier into.
You DO NOT put the yellow to the 24v HUM on the board. Ignore the HUM on the board.
The yellows will only go to the blacks on the humidistat.
You DO NOT put the yellow to the 24v HUM on the board. Ignore the HUM on the board.
The yellows will only go to the blacks on the humidistat.
#7
Member
Join Date: Dec 2007
Posts: 7
Received 0 Votes
on
0 Posts
honeywell HE360A
Anyhow, I hooked it up to the 24v HUM and it worked once. I can't get it to work again. Touching the two yellow wires do not activate the fan or solenoid. But there is definitely current as it sparks a little when they touch. Question is, did I definitely fry something? If so, what?
#8
I am afraid you did... :-(
Yep, you fried it.. You had 24volts vs 24 volts.
You'll have to replace the transformer on the humidifier.
Anyhow, I hooked it up to the 24v HUM and it worked once. I can't get it to work again. Touching the two yellow wires do not activate the fan or solenoid. But there is definitely current as it sparks a little when they touch. Question is, did I definitely fry something? If so, what?
You'll have to replace the transformer on the humidifier.
#9
Member
Join Date: Dec 2007
Posts: 7
Received 0 Votes
on
0 Posts
Thanks Jay. The 260a didn't have any power on it's own per se and figured the connection would be the same. Guess not. In this case, I would have to use some kind of relay or sail switch? Where can I buy a relay? I think that's easier than cutting a hole for the sail switch. I don't think I've seen it at homedepot or lowes before.
#10
You will have to replace the transformer/board in the humidifier before we can do anything else.. Then you rewire the power from EAC on the board with out the need of any of the relays.
#11
Member
Join Date: Dec 2007
Posts: 7
Received 0 Votes
on
0 Posts
TIA.. this forum has been so helpful!
#12
Member
Join Date: Dec 2007
Posts: 7
Received 0 Votes
on
0 Posts
I found EAC1 and EAC2. EAC2 is capped. EAC1 is open. I assume EAC1 puts 120V. Looking at the board, where would I get the second lead (neutral) for it to completely power the outlet? Just splice it off the incoming power to the whole furnace?
TIA.. this forum has been so helpful!
TIA.. this forum has been so helpful!
Thanks!
#13
That's right, use that and run a wire to the side of the furance, and put an outlet box where you can plug the humidifier into.
Then tie the two yellow wires into the humididstat.
Then tie the two yellow wires into the humididstat.
#14
Member
Join Date: Dec 2007
Posts: 7
Received 0 Votes
on
0 Posts
Thanks for your help Jay.
#15
Thanks for the update Jon.
yeah, you don't want to get it too wet... 35 to 40% is good, and lower if it's really cold. YOu don't want your windows dripping wet!
Merry Christmas you and your family!
yeah, you don't want to get it too wet... 35 to 40% is good, and lower if it's really cold. YOu don't want your windows dripping wet!
Merry Christmas you and your family!
#16
Member
Join Date: Jan 2008
Posts: 6
Received 0 Votes
on
0 Posts
I'm glad I found this thread, as this is perfect for me. Just want to clarify a thing or two. My eac1 and 2 are open. So I take like 14 gauge wire and run to an outlet, or should I use different wire? Once this is done, I plug the humidifier into it. I would guess I should not plug anything else into this? Not even a condensate pump?
#17
I'm glad I found this thread, as this is perfect for me. Just want to clarify a thing or two. My eac1 and 2 are open. So I take like 14 gauge wire and run to an outlet, or should I use different wire? Once this is done, I plug the humidifier into it. I would guess I should not plug anything else into this? Not even a condensate pump?
#18
Member
Join Date: Jan 2008
Posts: 6
Received 0 Votes
on
0 Posts
I got this set up and working tonight. Thank you so much for the help. I decided not to get a condensate pump anyways, as my sump pump is not too far from furnace and the hoses are not in the way of constant traffic. One piece of advice I'd offer to people who buy this model is not to buy the install kit. I used about 2 feet of 18 gauge wire that came with it. You can go buy a ice maker line kit instead of what they supply, and one extra fitting. The drain tube they sent was too short to reach my sump, so I have to go buy more anyways. Maybe it's worth it if you need the sail switch.
#20
Member
Join Date: Oct 2006
Location: US
Posts: 4
Received 0 Votes
on
0 Posts

Jay,
I guess I feel like an idiot whereas others understand what to to.
I'm installing the 360 model. I have a red wire and white wire coming from the humidistat (which are connected to the 2 black wires in the humidistat), and the humidifier has 2 yellow and 2 red connectors hanging from it.
It seems like you're telling me to connect the 2 yellow wires on the humidifer to the 2 wires (red and white) coming from the humidistat.
Is that correct?
And what to do with the 2 RED wires on the humidifier. Leave them alone?
DKA
I guess I feel like an idiot whereas others understand what to to.
I'm installing the 360 model. I have a red wire and white wire coming from the humidistat (which are connected to the 2 black wires in the humidistat), and the humidifier has 2 yellow and 2 red connectors hanging from it.
It seems like you're telling me to connect the 2 yellow wires on the humidifer to the 2 wires (red and white) coming from the humidistat.
Is that correct?

And what to do with the 2 RED wires on the humidifier. Leave them alone?
DKA
#21
And what to do with the 2 RED wires on the humidifier. Leave them alone?
#23
YEah. it seems like a lot of water is wasted. but I'd rather have that than a pan full of old stale water that can be a breading ground of germs.
I don't see a much of hit on my water bill.. I think it's about a dollar incresse.
I don't see a much of hit on my water bill.. I think it's about a dollar incresse.