Connecting Power - Ecobee Smart Thermostat Installation Manual

4.
Move the backplate out of the way and make holes where
indicated in step 3. The mounting holes can accommodate a #6
pan-head screw.
5.
Use drywall plugs or other screw anchors (not included) to
ensure that the Smart Thermostat can be mounted securely to
the wall.
6.
Fasten the backplate to the wall using the appropriate screws
(not included).
Connecting the Smart Thermostat to
the Equipment Interface
Only four wires are required to connect the Smart Thermostat to the
Equipment Interface. If you are replacing a thermostat, you can use
the existing wiring.
Note: Ensure that any unused wires do not have exposed bare copper.
Follow these steps to connect the Smart Thermostat to the
Equipment Interface:
1.
Connect the wires between the Smart Thermostat and Equipment
Interface as shown below.
D- D+ GND +12V
Thermostat
Configuration of wiring from Smart Thermostat to the Equipment Interface
2.
Once wiring is complete, insert the coin cell battery (included) into
the holder. Ensure the (+) side of the battery is facing up.
3.
Attach the front cover of the Smart Thermostat to the backplate.
Ensure the four pins on the circuit board mate with the terminal
block on the backplate as shown below.
13
D-
Equipment
D+
Interface
GND
+12V
Replace the front cover ensuring the pins meet the terminals

Connecting power

Once you've completed the wiring of the Smart Thermostat and
Equipment Interface, you can apply power to the Equipment Interface
and restore power to the heating and air conditioning equipment.
There are two methods of powering the Smart Thermostat. You can
power it directly from a 24Vac source capable of at least 3VA.
24 Vac
24Vac | 3VA min
The second method requires the optional 120V to 12Vdc power
adaptor. Plug the power supply into a standard electrical outlet and
plug the barrel connector into the Equipment Interface.
Plug the adaptor into the equipment interface
14
hard wired 24 Vac option