I am looking to replace my standard thermostats with ADC-T2000s. I’ve installed these at a previous property so very comfortable with the wiring aspect, but this system is a bit more complicated.
I have a dual-zoned HVAC system with two thermostats. Zone 2 is regulated by an automatic damper that opens and closes based on the temperature in Zone 2. The main thermostat has a manual heat/cool toggle switch that appears to be a custom addition by whoever installed the system several years ago. This effectively overrides the thermostat’s ability to digitally change from heat/cool, so that both zones are in the same heat/cool mode simultaneously. I’ve attached a photo of the wiring where you can see the toggle on the right side.
All of that sounds intuitive to me, but the presence of a manual toggle does mean changing the thermostats is a different ball of wax. Does anyone have experience with this kind of setup? I’m fine leaving the manual toggle in place for the ADC-T2000 if needed, since the need to switch from heat to cool mode happens only a handful of times per year. But I don’t want to fry the thermostat or (worse) blow the furnace.
I’ve had someone look at it and tell me to just leave it as is based on the “if it ain’t broke don’t fix it” mindset, but that is completely unacceptable to me since I wouldn’t get the automation and remote monitoring capabilities that I need.