Installing your ecobee Thermostat
In most homes, installing an ecobee thermostat is an easy DIY project that takes about 20-30 minutes to complete. The installation guide includes step-by-step instructions that make it easy to install and wire your thermostat, so use it as your main reference. You can also refer to this page for extra help.
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If you have an extra wire available to use behind your existing thermostat and your furnace or boiler system control board has a C terminal. Article: Heat Only Installation (Scenario #1) Article: 3-Wire Installation (R, G, W)
Using an External 24V TransformerIf your furnace or boiler control board does not have a C terminal, then you can power the thermostat by adding a 24V Transformer. Article: Heat Only Installation
Using the Fast-Stat Common MakerIn most cases when you only have 2 wires available behind your existing thermostat, you can use the Fast-Stat Common Maker to complete the installation. |
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If your thermostat doesn't have a C wire and there are no extra wires to use, you can use the Power Extender Kit (PEK) to complete the installation. Article: Installing with the PEK
Using a C WireIf you have an extra wire available and your air handler control board has a C terminal. Article: Installing with a C wire Article: Installing with a Boiler and AC
Setup & PreferencesIf you have a heat pump system with auxiliary heat (AUX), you'll see the AUX Savings Optimization feature under the thresholds menu. This is important for those who wish to limit the use of their AUX heat. |
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ecobee thermostats are compatible with zone boards that can support independent 24VAC thermostats. Note that if you are installing using the Power Extender Kit (PEK) , it will be installed at your zone board. Article: Zone Switching Relay (No C Terminal)
I have Hot-Water Zone Valvesecobee thermostats are compatible with systems that use zone valves. There typically won't be enough power to support multiple smart thermostats, so you may need to add an 24V transformer and an isolation relay.
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If you have 1 wire that goes from the accessory to your thermostat, then you have an Internally Powered accessory. If you have 2 wires that go from the accessory to your thermostat, then you have an Externally Powered accessory. Article: 1 Wire Accessory Installations Article: 2-Wire Accessory Installations
Setup & PreferencesThe ecobee will guide you through accessory configuration during initial setup and you will be given the option of selecting a 2 wire or 1 wire accessory. Make sure to select the option that reflects your accessory's wiring as this could cause the equipment not to turn on. |
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Installing your thermostatWhen wiring an ecobee thermostat for a multi-speed fan system, specific wiring terminals on the ecobee will be used to accommodate for the lack of dedicated G2/G3/S1/S2 terminals. Article: Multi-Speed Fan Installations
Setup & PreferencesIn order to configure your ecobee for multi-speed fan support, you'll need to select the "I'm a pro" option during the initial setup. |
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