Hi,
I have an Ecobee 4 unit that I would like to get connected to my Air Exchanger.
The Boiler works great. The Air Exchanger is on it's own connection/circuit. There are no interconnects.
The original wires going to the wall control were Y R G B.
I tried hooking up most connections to ACC-/ACC+ on the Ecobee and the unit is just not seeing anything to configure.
Wire B and G to the ACC terminals.