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 the Thermostat can be mounted
securely to the wall.
6.
Fasten the backplate to the wall using the
appropriate screws (not included).
Connecting the Thermostat to
the Equipment Interface
Only four wires are needed to connect the Thermostat
to the Equipment Interface. If you are replacing a
Thermostat, you can use the existing wiring.
Note: Ensure any unused wires do not have exposed
bare copper conductors.
1.
Connect the wires between the Thermostat and
Equipment Interface as shown below.
2. 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.
17 Installing The ecobee System
The Thermostat come with a factory installed, coin cell
battery . When replacing the battery ensure the + side of
the battery is facing out and the battery contacts remain
in the upright position (not bent underneath the battery).
The battery should snap in easily. (See page 15)
Connecting Power
Once you’ve completed the wiring of the 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 Thermostat.
You can power it directly from a 24VAC source capable
of at least 3VA.
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.
Wiring from Thermostat to the Equipment Interface
D- D+ GND +12V
Equipment
Interface
Thermostat
D-
D+
GND
+12V
Replace the front cover ensuring the pins meet the terminals
Plug the adaptor into the Equipment Interface
hard-wired 24 VAC option
24 Vac
24Vac | 3VA min
Installing The ecobee System 18
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