Ecobee Power Extender Kit User Manual

A common wire (C) is required for
5-wire thermostats. If there are only 4
wires to your existing thermostat (i.e.
there is no C wire), you can use the
ecobee Power Extender Kit to power
your thermostat.
Step 1. Install Wiring Harness
The Power Extender wiring harness must be installed in an indoor, dry
location, near the HVAC equipment. When choosing a location, the
distance between the wiring harness and the HVAC equipment must not
exceed 24 inches (0.6 m) .
This equipment is sensitive to electrostatic discharge (ESD). Before
starting, discharge your body of static electricity by touching a
grounded metal object. Always hold the devices by their edges
and do not touch any of the internal components.
1. Power o the HVAC equipment.
2. Remove the top cover of the wiring harness by gently squeezing its
sides.
3. Use 2 #6 pan-head screws or double-sided adhesive to attach the
wiring harness to a at surface (for example, the furnace casing).
!
Step 2. Install Diode
The diode is designed to be installed behind the thermostat, within the
thermostat’s backpanel wire opening.
1. Use your ngers to gently pry the thermostat away from its base.
2. Using the thermostat’s backpanel wire opening as a guide, gently
bend the diode wires 90 degrees so that they can be inserted into the
W O/B and Y terminals:
The diode itself should stay within the wire opening.
3. Clip the diode legs so that you can insert them into the W and Y
terminals. DO NOT over clip the legs.
4. Connect the diode legs to the W O/B and Y terminals.
Y
N/C
W
O/B
G
RC
RH
C
Y2
W2
AUX
W
Y
N/CGRCRHCY2
W2
AUX
W
Y
W
O/B
Y
Wiring Channel
Removeable Cover
Power Extender Kit
W
Y
Diode
G C W Y RH RC
G C W Y RH RC
STAT EQUIP
Thermostat Side
HVAC Side
Mounting Hole
Mounting Hole
Power Extender Kit
User Manual
Wiring Harness

Ecobee Power Extender Kit Specifications

Operating Environment

temperature range	-40°F to 160°F
humidity range	5-95% RH (non-condensing)
indoor use only	Yes

Electrical

input voltage	18 to 30 VAC
input current	30mA@24V
output voltage	18 to 30 VAC

Weight and Dimensions

height	3.3 inches
width	2.0 inches
depth	1.0 inches

Summary

Install Wiring Harness

Power Off HVAC Equipment

Ensure the HVAC equipment is powered off before starting the installation process.

Prepare Wiring Harness Mount

Remove wiring harness cover and attach it to a flat surface using provided hardware.

Install Diode

Remove Thermostat from Base

Gently pry the thermostat away from its backplate to access the wiring terminals.

Bend and Insert Diode Wires

Bend diode wires 90 degrees and insert them into the W O/B and Y terminals.

Clip Diode Legs

Carefully clip the diode legs to facilitate insertion into the W and Y terminals.

Connect Wires

Connect Thermostat Wires to Harness

Connect C, RC/RH, and G wires from thermostat to wiring harness STAT side.

Connect Diode Output to Harness

Connect the diode output to the Y terminal on the wiring harness STAT side.

Connect Harness to HVAC Equipment

Connect harness EQUIP side wires to matching terminals on your air handler.

Power On and Test System

Re-attach Thermostat and Covers

Re-secure thermostat to backplate and re-attach wiring harness cover.

Power On HVAC Equipment

Turn on the HVAC equipment; the thermostat should power on automatically.

Test Thermostat Functions

Verify wiring by testing different temperature settings and HVAC modes.

Product Specifications

Environmental and Dimensions

Details on operating temperature, humidity, and physical product dimensions.

Electrical Specifications

Information on input and output voltage, frequency, and current ratings.

Warranty Information

3-Year Limited Warranty

Outlines the product's three-year warranty, covering defects and limitations.