I am replacing an older thermostat (Honeywell T8085R 1015) with a Honeywell THM5320R. The T8085R wires are currently connected to X(C)-blue, W2-white, O-orange, R-red, G-black, Y-yellow. Unfortunately the installation guide for a Heat Pump setup does not show this as an option. My guess would be to connect C-blue, R-red, W O/B-orange, Y-yellow, Y2-white, G-black. Please let me know what would be correct.
OK, after further review, I believe my guess would be incorrect. I think my best bet would be to just connect it as follows: C-blue, W2 AUX/E-white, W O/B-orange, R-red, Y-yellow, G-black. Since this is not one of the suggested methods of installation in the guide book I'd appreciate any input whether this would work.