ecobee3 Wiring Diagrams


The following pages provide wiring diagrams for common HVAC equipment configurations.

Conventional Heating and Cooling

Heat Only

ecobee3 Wiring Diagrams

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

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

Air or Geothermal Heat Pump with Auxiliary Heat

ecobee3 Wiring Diagrams

Air or Geothermal Heat Pump (2 Stages) with Auxiliary Heat

ecobee3 Wiring Diagrams

Boiler or Radiant System with Air Handler and Conventional Cooling or Heat Pump

ecobee3 Wiring Diagrams

Boiler or Radiant System (2 stages) with Air Handler and Conventional Cooling or Heat Pump

ecobee3 Wiring Diagrams

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

Note: You will need to configure the accessory device when you first power on your ecobee3.

PEK thermostat wiring diagram

ecobee3 Wiring Diagrams

ecobee3 User Manual