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There's ways to cord this up. The first method is to take gain of the hum terminal on the furnace control board. This terminal will supply one hundred twenty volts whilst the furnace is running in warmness mode, so that you'll need to use an extra transformer.
With this setup, you will connect the 24vac terminals of the humidistat to the c and w terminals at the furnace manipulate board. That manner while the thermostat calls for warmth, the humidistat could be powered by using the furnaces transformer.
The yellow and blue wires should be linked to w and c of the manipulate board. You may need to attach them where the thermostat twine is attached. Doing this could supply your humidifier/humidistat electricity when the furnace is in a heating cycle.
The furnace works great! But: q1. How do i know which humidistat wires to hook up with furnace control board terminals? Q2, q3. Exactly which terminals on the furnace manipulate board - which of them and how?.