Connecting Power; Equipment Interface Status Led - Ecobee SMART Installation Manual

Note the small clips
on the edge of the
battery encasing.
The Thermostat comes 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.

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
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.
17 Installing The Smart Thermostat
Slide the battery under the contacts and push down firmly
Push down on the
Slide the battery
battery rmly until
UNDER the clips.
it snaps into place.
24Vac | 3VA min
Hard-wired 24 VAC option
Plug the adaptor into the Equipment Interface

Equipment Interface Status LED

The Equipment Interface has four LEDs to display the
status of the system.
If you've wired the system correctly, only the Power LED
should be on.
Power
System
Line
Communication
The LEDs operate as follows:
Power
This LED monitors the power supply of the
Equipment Interface.
LED ON Power is connected to the Equipment
Interface and is within the appropriate
voltage range.
LED OFF Power is disconnected or has dropped
below 9V.
System
This LED monitors the operation of the
Equipment Interface.
LED ON There is a fault with the Equipment Interface.
LED OFF The equipment interface is operational.
line
This LED monitors the power supplied to the Smart
Thermostat from the Equipment Interface.
LED ON The voltage at the +12V and GND terminal
has dropped below 7V.
LED OFF Adequate power is being supplied to the
Smart Thermostat.
Communication
This LED monitors the communication
between the Smart Thermostat and the Equipment
Interface (i.e., the D+ and D- terminals).
LED ON The Equipment Interface and Smart Thermostat
are not communicating with each other.
LED OFF The two devices are communicating properly.
LED arrangement
Installing The Smart Thermostat 18