Installing a TrueIAQ wth Nest


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Old 03-07-15, 06:34 AM
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Installing a TrueIAQ wth Nest

I've got an American Standard Freedom 90vs furnace with a Honeywell HE150 Humidifier and a Nest thermostat. It has been extremely cold the last couple of winters and I have been having condensation issues so I bought a Honeywell TrueIAQ humidistat to automatically adjust humidity. My initial problem seems to be drawing power to the IAQ in that my furnace connections do not have a connector labeled "C" which seems odd. If I take power from the "power out" from the Humidifier then the humidistat only lights up when the furnace is running. My furnace connectors are labeled G W2 W1 B O Y YLO BK R.

Where is the C for the Humidistat?
 
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Old 03-07-15, 09:11 AM
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American Standard and Trane label the C terminal B on their equipment.
 
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Old 03-07-15, 09:29 AM
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OK, that helps immensely!

I'll come back if there are problems!

Thank you!
 
 

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