The following pages provide wiring diagrams for common HVAC equipment configurations.
Conventional Heating and Cooling
Heat Only
![ecobee3 Wiring Diagrams](https://i0.wp.com/hereforgear.co/wp-content/uploads/2022/10/ecobee3-heat-only-wiring-diagram.png?resize=900%2C577&ssl=1)
Note: Do not jumper Rc or Rh, ecobee3 does this automatically. R can go into either Rc or Rh terminals on your ecobee3.
Heat and Cool
![ecobee3 Wiring Diagrams](https://i0.wp.com/hereforgear.co/wp-content/uploads/2022/10/ecobee3-heat-and-cool-wiring-diagram.png?resize=900%2C598&ssl=1)
Note: Do not jumper Rc or Rh, ecobee3 does this automatically. R can go into either Rc or Rh terminals on your ecobee3.
Heat and Cool (2 Stage Heat)
![ecobee3 Wiring Diagrams](https://i0.wp.com/hereforgear.co/wp-content/uploads/2022/10/ecobee3-heat-and-cool-2-stage-heat.png?resize=900%2C697&ssl=1)
Air or Geothermal Heat Pump with Auxiliary Heat
![ecobee3 Wiring Diagrams](https://i0.wp.com/hereforgear.co/wp-content/uploads/2022/10/ecobee3-air-or-geothermal-heat-pump-with-auxiliary-heat-wiring-diagram-1.png?resize=900%2C596&ssl=1)
Air or Geothermal Heat Pump (2 Stages) with Auxiliary Heat
![ecobee3 Wiring Diagrams](https://i0.wp.com/hereforgear.co/wp-content/uploads/2022/10/ecobee3-air-or-geothermal-heat-pump-wiring-diagram.png?resize=900%2C571&ssl=1)
Boiler or Radiant System with Air Handler and Conventional Cooling or Heat Pump
![ecobee3 Wiring Diagrams](https://i0.wp.com/hereforgear.co/wp-content/uploads/2022/10/ecobee3-boiler-or-radiant-system-wiring-diagram.png?resize=900%2C628&ssl=1)
Boiler or Radiant System (2 stages) with Air Handler and Conventional Cooling or Heat Pump
![ecobee3 Wiring Diagrams](https://i0.wp.com/hereforgear.co/wp-content/uploads/2022/10/ecobee3-boiler-or-radiant-system-with-air-hadler-wiring-diagram.png?resize=900%2C611&ssl=1)
Accessory devices
The ecobee3 can control an accessory HVAC device like a humidifier, dehumidifier, or ventilation device from its ACC terminals. If the accessory is internally powered, connect the 24V to ACC+. Also connect the common for the accessory to common on the control board.
![ecobee3 Wiring Diagrams](https://i0.wp.com/hereforgear.co/wp-content/uploads/2022/10/ecobee3-accessory-wiring-diagram.png?resize=900%2C433&ssl=1)
Note: You will need to configure the accessory device when you first power on your ecobee3.
PEK thermostat wiring diagram
![ecobee3 Wiring Diagrams](https://i0.wp.com/hereforgear.co/wp-content/uploads/2022/10/ecobee3-PEK-thermostat-wiring-diagram.png?resize=900%2C469&ssl=1)