Wiring a Line Voltage Thermostat

Wiring a line voltage thermostat correctly ensures reliable performance in heating, ventilating, and refrigeration applications. Our thermostats typically feature three contact points and are pre-wired for heating unless specified otherwise. When you open the thermostat, you will see a white wire at the blue dot and another wire at the red dot, indicating heating. The red wire is your power—do not move this wire. To wire the thermostat for cooling, simply move the wire on the blue dot to the yellow dot. For additional information on our line voltage thermostats, visit the product page.

Wiring Instructions for a Line Voltage Thermostat

Important: Ensure all wiring complies with applicable codes, ordinances, and regulations. Use a disconnect device and overload protection to guarantee a safe installation in line with local and national codes. Figures 1, 2, and 3 illustrate typical wiring configurations for heating, cooling, refrigeration, and combination heating/cooling control systems (use copper conductors only). For more detailed information or troubleshooting support, click here to review the instructions.

General Wiring Steps

1. Remove the four screws securing the thermostat cover and take the cover off.
2. Connect wires to the appropriate terminals (heating or cooling). Refer to the wiring diagrams for guidance.
3. Reattach the cover for safety.
4. Connect the power supply.
5. Tighten the screws on the thermostat cover.
6. Turn the dial to align the desired temperature with the pointer.

Checking the Wiring

1. Turn the dial to 110°F. In heating mode, the device should activate; in cooling mode, the device should remain off.
2. Turn the dial to 30°F. In heating mode, the device should deactivate; in cooling mode, the device should activate.
3. As the dial passes the current room temperature, you should hear a faint click from the line voltage thermostat.

Switching Between Heating and Cooling

1. Disconnect the power supply.
2. Remove the four screws securing the thermostat cover and take the cover off.
3. To switch to cooling mode, move the wire from the heating terminal to the cooling terminal.
4. To switch back to heating mode, move the wire from the cooling terminal to the heating terminal.

For more detailed information or troubleshooting support, click here to review the instructions.

By following these steps precisely, you can ensure safety and functionality. For any further assistance, feel free to consult a professional electrician or refer to our provided diagrams and instructions. At Tempro, we are here to support you every step of the way. For additional questions, please contact us.