ControlTemp Basic Tamper Proof Thermostat
Supplemental Instructions
Common Wiring Configurations
- Two wire heat only should be connected to Rh/B and W
- Three wire furnace w/o AC should be connected to Rh/B, W, G
- Four wire furnace with AC should be connected to Rh/B, W, Y and G
- Single stage Heat Pump should be connected to R, G, Y, Rc/O (cool) or Rh/B (heat)
| Thermostat Terminals | |
| R, Rc/O, Rh/B | 24v (Hot), depending on system type |
| C | 24vac (Optional Common) |
| W | Heat Relay |
| Y | Cool Relay |
| G | Fan Relay |
Note: Before removing your old thermostat, label what wires are connected to which terminals. You should connect the wires to the same terminals on the CT72/CT74/CT76 units.
- Keep Jumper in place.
- Thermostat can be used with or without batteries if connected to the C terminal.
- The colors do not matter. What matters is what function the wire performs.
