Question about Aprilaire 550 Humidifier
The furnace only shuts off when humidity drops to the level that the humidifier has to turn on.
Some one has the humidifier hooked up to the R and W on the furnace.
1. it should be hooked up to its own transformer or to a proper low voltage terminal on the circuit board(beware there are high voltage HUM terminals) markd HUM and the other wire to C or the common.
2. You could hook the wire to W or white and C Common but I would rather see a seperate transformer since there is a possiblity this could cause solenoid chattering
Posted on Dec 16, 2009
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Posted on Jan 02, 2017
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