Honeywell CT33 Owner's Manual - Page 4

Owner's Manual Mount thermostat base 1 Drill holes at pencil-marked locations (3/16" holes for drywall, 7/32" holes for plaster). 2 Use hammer to tap anchors into holes until flush with wall. 3 [Optional] Pull wires through cover plate (if needed to cover marks left by your old thermostat). 4 Connect wires first (see below), then insert screws. Check level if desired, then tighten screws. Optional cover plate Thermostat base Wire connections 1 Match each labeled wire with same letter on terminal. 2 Use a screwdriver to loosen screw terminals, wrap bare wire securely around terminals, then tighten screws. 3 Push any excess wire back into the wall opening. Labels don't match? If labels do not match letters on thermostat, see table below. Existing wires R • RH • 4 • V W • W1 • H Y • Y1 • M G•F Rc Connect to: Terminal "R" Terminal "W" Stop! See note Stop! See note Stop! See note Back of thermostat base If any of these wires are present, you cannot use this thermostat with your system. See page 2. 4