I'm trying to replace an old trane thermostat with a hunter Model 44155C. The wire colors have got me confused. There are seven coming from my trane unit wires: red, green, blue, yellow, orange, black, and white. The hunter thermostat has connections for RH, RC, G, Y/O, W/B, and Y1. Which ones from the trane go to which ones on the hunter?? :confused: