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I have recently purchased an ecobee3 thermostat to replace one of my existing thermostats to see how well it will work in my home. I would like to use the ecobee3 to control my humidifier, but I am not sure if I can do what I want.
I have a dual zone system setup with a zone controller, two thermostats and a single humidifier control in the cold air return at the furnace. Below is a wiring diagram that outlines the current setup:
I have six wires running between the furnace and each thermostat. After reading many posts, I believe all I need to do is purchase a 6AZU2 relay and wire it between the ACC+ terminal on the ecobee3 and the C terminal on the furnace. Below is wiring diagram of the proposed setup:
Can I attach the ACC+ from both thermostats to the single relay and have it activate whenever either zone calls for the humidifier to run or would it be better to install two relays with the outputs connected in parallel?
I hope this is enough information, but if I am missing anything, please let me know.
Thank you in advance,