Wiring to use furnace contoller HUM terminal?


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Old 10-14-07, 06:32 PM
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Wiring to use furnace contoller HUM terminal?

The various posts about humidifier installation have been very helpful. Iím currently installing a Honeywell HE220 By-Pass Flow-Through unit on my York unit. Could one of you who have ďbeen there, done thatĒ confirm my wiring configuration.

I have a White-Rodger 50A55-843 ďUniversal Integrated Furnace ControlĒ which has optional spade terminals for a HUM humidifier. So, I should be able to simplify from the standard instructions. Instead of: (1) transformer -> (2) humidistat -> (3) sail switch -> (4) humidifier solenoid value), I should be able to simply do: (1) Furnace Control HUM -> (2) humidistat -> (3) humidifier solenoid value (i.e., HUM provides the 24 Volts AC and since itís only active when the furnace is on, I donít need the sail switch either). Is this right?


Iím also curious if anyone has any experience with the Honeywell H1008A1008 Automatic Humidity Control with HumidiCalc+. My kit came with the H8908B Humidistat which should be fine (but Iíll need to adjust it as the outside temperature fluctuates). Iíve seen the automatic unit for about $75. Does it work as well as it sounds? Do I need the outside temperature sensor?

Thanks
 
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Old 10-14-07, 07:14 PM
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Originally Posted by cecwl View Post
I should be able to simply do: (1) Furnace Control HUM -> (2) humidistat -> (3) humidifier solenoid value (i.e., HUM provides the 24 Volts AC and since itís only active when the furnace is on, I donít need the sail switch either). Is this right?
Yes, that is right. Easy does it!


Iím also curious if anyone has any experience with the Honeywell H1008A1008 Automatic Humidity Control with HumidiCalc+. My kit came with the H8908B Humidistat which should be fine (but Iíll need to adjust it as the outside temperature fluctuates). Iíve seen the automatic unit for about $75. Does it work as well as it sounds? Do I need the outside temperature sensor?

Thanks
I've never used that control, I was planning on getting that one when I was looking at humidifier, but I upgraded to the Honeywell IAQ t-stat that controls my humidifier.

The out door sensor is great if you live in area that has extream temp changes (like Minnesota), otherwise, if you are down south like Missouri, then the outdoor sensor is not really needed.. Just dial down if the temp is going to get really cold.
 
 

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