I am a doit yourselfer that is struggling with a thermostat change out. I am replacing a T874R1384 mercury thermostat with a TH1210D1008 Pro 1000 thermostat. I have a carrier heat pump with emergency heat. The old thermostat has 8 wires and the new one only has 6 terminals. I have attached a photo of the current wiring on the old thermostat. Any help would be appriciated.