Thermostat connections D R B/C

[Plumber69]

I want to swap out a thermostat for a high efficiency furnace. American Standard. On the furnace its labled D R B/C. I'm use to R W C. Can someone make sense of this for me

 

[Breplum]

I use the wiring diagrams, but, in my forty five years involved, only ever seen YWRGC on gas furnace. Trane makes Am.Std.
NO mfr uses anything else in north America. Possibly you are looking at the the incorrect/wrong screw terminals.
Heat pump has a few other letters

 

[Sponsor]

 

[Plumber69]

I use the wiring diagrams, but, in my forty five years involved, only ever seen YWRGC on gas furnace. Trane makes Am.Std.
NO mfr uses anything else in north America. Possibly you are looking at the the incorrect/wrong screw terminals.
Heat pump has a few other letters

I'm replacing the thermostat the thermostat that's in now is hooked up to those terminals and works fine. I believe B/C is common

 

[Fitter30]

This by chance a Trane comfort link system if it is regular stat won't work. If this is a older system have no idea if they make wifi stat for it