I have a Janitrol thermostat that I want to replace (with a digital programmable thermostat). The connections for the Janitrol thermostat has the following... Y G R O WZ E and C. I bought a honeywell model RTH230b. It only has connections for... Rh Rc W Y and G. Can I use this honeywell model? Is there another model or type of thermostat that I need? I just can't find another model on the net that shows the hookups for the wires I already have.