Humidifiers and Dehumidifiers - HE265 w/ DG115EZIAQ

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jsweitzer
02-24-09, 08:16 PM
I installed a new HE265 w/ DG115EZIAQ. I wired the humidistat according to the updated installation manual.

http://customer.honeywell.com/techlit/pdf/69-0000s/69-2072.pdf

To test humidifier, I turn thermostat to 80F and humidistat to 70%. Humidistat does not display "Humidify" and I do not get 24V supply to humidifier solenoid.

Jay11J
02-24-09, 09:34 PM
Are you using the Transformer for power for HUM?
jsweitzer
02-25-09, 06:18 AM
I jumped R(IAQ) to HUM1(IAQ). HUM2(IAQ) to humidifier. Humidifier to C(IAQ).

Jay11J
02-25-09, 05:49 PM
Is the display showing anything.

W tied to W on furnace?

G tied to G on furnace.
jsweitzer
02-25-09, 09:48 PM
The display shows internal temp and humidity and external temp and humidity. I piggybacked W(IAQ) to W on back of thermostat and G(IAQ) to G on back of thermostat -- both of which are wire directly to W and G on furnace board.

What should the voltage be on W/G during call for heat/fan? Where would I place the ground (black) lead on my DVOM with a 4-wire non-common thermostat?
Jay11J
02-26-09, 06:43 PM
You should read 24volts AC on call of Heat on W.

and 24 volts on G when fan is on.