Replacing Aprilaire 760 with 700M--wiring question to a Lennox G71MPP


Old 11-20-17, 07:32 PM
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Replacing Aprilaire 760 with 700M--wiring question to a Lennox G71MPP

I currently have an Aprilaire 760 Humidifier, I will be replacing it with Aprilaire 700M model. I'm wondering how hard is it to wire in the 760 ? does the 760 and 700M use the same wiring scheme and color ? Can any provide any details that would help. If I hire someone, labor will be $350.

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Old 11-20-17, 09:03 PM
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Welcome to the forums.

Over the years there have been changes to the 700 series of humidifiers.
What color is the cabinet for the 760...... beige ?

The new 700M requires 24vac to be applied to it's connecting wiring for activation.
The older 760 could have been that way or had it's own internal transformer.

There should be a two conductor thermostat cable connecting the humidifier to the humidistat. It may also connect at the control board in the furnace. Check out the wiring.

Pictures are always helpful..... How-to-insert-pictures
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