Help with wiring HE220A and Carrier 58STA/STX

I've been reading over this forum for the past few days, and there is a lot of great stuff here! Keep up the great work!

I am planning on installing an HE220A this weekend. Based on what I've read from the forum, I plan on installing it on the cold air return with the bypass on the hot air supply, and am planning on running hot water to the humidifier. I was wondering, though, if I could get some help with wiring it to my furnace so the humidifier only comes on when the furnace blower is on and the humidistat says humidity is needed. I originally bought the installation kit, but am hoping I can return that since I shouldn't need the sail switch if I wire it to the furnace.

Can you help me figure out the wiring? I have a Carrier 58STA/STX furnace. Also, will I need the transformer that came with the humidifier if I wire it to the furnace? Thanks for all your help!

 

You can energize your water coil by running a control wire from your call for heat through your normally open call for humidification if you just use the sail switch or a fan control circuit you run the risk of putting moisture in a cold airstream and creating humidity problems

 

Yes, you can wire off the board on the furnace.. I would get in details, but I am on the go at this min..

Do a search on Carrier 58STA humidifer, and should come back with a post I've helped out in the past..

Otherwise, I will reply back later tonight! :-)

 

You furnace has 24 volts HUM on the board, near the T-stat wire hook up.

From there that wire runs to the humidistat. From humidistat to the water valve. From other wire on valve to 24 volts com on the board.

 

I think I understand, but I am totally new to this. Can you explain what you mean by 'com on the board'? Also, wiring it this way, I do not need the transformer, correct? Finally, what type of wire do I need to purchase to wire it together?

Thanks for all your help!

 

Com meaning 24Com...Common/Neutral

Correct.

18-2 t-stat wire.

 

Thanks for the quick reply. Do you know if I'll need any special 'connectors' to connect the wires to the board? (I'm not sure what the correct terminology is), or will I be able to connect the wires directly? Sorry, I'm not an electrical genius, so I'm probably using all the wrong terminology.

 

You want the 1/4" female electrical spade. Just like the wires that is tied onto the male spade on the board.

You'll need to remove the plastic cap that is on the EAC on the board.

 

Thanks for the clarification. I wasn't sure what the connectors were called, now I know what to look for :-)

The EAC or the HUM? I thought I had to wire to the HUM?

 

You are right.. HUM.. My mind is sleeping..

 

Thanks for all your help! I plan on installing it tomorrow. I'll let you know how it goes.

 

Ok, Will be waiting for the update, or other questions.

have a good evening!

 

I got the humidifier installed today, and wired it as you recommended and it works great! Thank you so much for all your help. It is nice to know that there are people out there still that are willing to lend a helping hand and not want anything in return apart from knowing they helped someone.

Thanks again!

 

Thanks for the update, and I am glad to help you out and everything is working out for you.

You have a great weekend!