I would like to replace my Coleman thermostat with the Honeywell RTH8500, and would like some help with the wiring. My system is a Coleman heat/cool heat pump, with a control box mounted on the oil furnace (emergency heat). The wires on the existing Coleman thermostat are: E blank, G green, B black, O orange, Y yellow, R red, X blue, L brown, W2 white. The wires on the Honeywell RTH8500 are: L, E, AUX, RC, R, O/B, Y, G, C.
Any assistance would be greatly appreciated!

Thanks,
Duane