Honeywell CT30 - Label and Remove Wallplate; Mount Thermostat Base

Label wires and remove old wallplate
Use a screwdriver to disconnect wires one by one.As you disconnect each wire, wrap it with the label matching the
letter on your old thermostat. (Adhesive labels are supplied in your thermostat package.)
Remove the old wallplate only after all wires are labeled. Be careful not to let loose wires fall into the wall opening.
Mount thermostat base