I just had my installer out to hook up the dehumidification terminals from the IAQ to my new York YP9C. (Something they did not do initially.) But he refused saying that he talked with the York techs and that
1) I need a special relay since I have a variable speed blower
2) It puts additional strain on the circuit board and if it goes out because of the IAQ, York won't honor the warranty
3) the better thing to do is get a humidistat that goes on the return duct that measures the whole house.
4) and 50% humidity in the summer is "a healthy house"
So... my questions:
Exactly how is the IAQ supposed to be hooked up to the YP9C? Do I need an extra relay?
What is this about "strain on the circuit board"? Can I talk with a York customer service person and get their take on this?
What constitutes "comfort" in the summer time in Chicago (rel humidity)?
Thanks in advance for all of your help.