I am trying to replace my old honeywell thermostat with a new Honeywell t8624d Chronotherm IV. My old thermostat is the round turning type. I just want to use my new one for a 1 zone heat in basement. There is a red and white wire coming out of the wall. The red is going to the valve and the white is for the relay. How do I connect these 2 wires to the t8624? Is it possible? Will it work? My furnace is a Burnham. Please help if possible. Thanks so much.