The wires off the old lennox were marked as C-Gray,O-white,W1-Blue, G-Green,Y1-Yellow, R-red. new RTH6300B thermostat can anyone tell me where the old wire should hook up, I did as the instruction says but end up with two left over wires and all that will come on is the heat and I have tried several combinations. Please help if you coud tell me where the old wires would go to the new?Jerry