Hello! Who’d like to confirm compatibility with my system. I have a
dual fuel system with a heat pump. Please see attached image. Current
Tstat has OAT and SRTN wires that I am unsure about.
After digging, I understand the OAT = outside air temp and SRTN =
return. Since this is a dual fuel system, I am curious how to wire the
O/W2/B and Y/Y2
