Ecobee SMART - Setting Up Your Smart Thermostat; Personalizing Thermostat Settings

Wiring Diagrams
Below are the Equipment Interface Terminal Labels
Please take note that there is a factory installed jumper
between R/H and R/C.
9 Installing The Smart Thermostat Installing The Smart Thermostat 10
D-
D+
GND
+12V
IN2-
IN2+
IN1-
IN1+
Y
W O/B
G
W2 AUX
R/H
R/C
NC
NC
ACC1
ACC1r
ACC2
ACC2r
ACC3
ACC3r
Power
System
Line
Communications
24 Vac
Y
W O/B
G
W2 AUX
R/H
R/C
ACC1
ACC1r
ACC2
ACC2r
ACC3
ACC3r
Equipment Interface
Y
G
R
Hum
W
C
Furnace
Humidier
C
24V
Air Conditioner
NOTE factory installed jumper.
Non Powered Accessories will require a jumper from RH | RC to ACC1, ACC2, ACC3 for a 24V feed.
Diagram indicates 24V humidier terminal. If your furnace control board does not have this, you must use a 110V/24V step down transformer.
Single Stage Heat/Cool With 3 Accessories
Dehumidier
HRV
C
24V
C
24V
C
24V
HRV
Humidier
Dehumidier
Single Stage Heat/Cool with Thrre Accessories
Dual Stage Heat/Cool with Two Accessories
Y
W O/B
G
W2 AUX
R/H
R/C
ACC1
ACC1r
ACC2
ACC2r
ACC3
ACC3r
Equipment Interface
Y1
G
W2
R
W1
Y2
Furnace
Humidier
C
24V
Air Conditioner
NOTE Indicates jumper. Non Powered Accessories will require a jumper from RH | RC to ACC1, ACC2, ACC3 for a 24V feed.
factory installed jumper.
Diagram indicates 24V humidier terminal. If your furnace control board does not have this, you must use a 110V/24V step down transformer.
Two Stage Heat/Cool With 2 Accessories
HRV
C
24V
Y1
Hum
C
HRV
Humidier
Comp2
R
C
Y2
indicates a jumper. Non-powered accessories require a jumper
from RH / RC to ACC1, ACC2, ACC3 for a 24V feed.
Y
W O/B
G
W2 AUX
R/H
R/C
ACC1
ACC1r
ACC2
ACC2r
ACC3
ACC3r
Equipment Interface
Y1
G
W2
R
W1
Y2
Furnace
Humidier
C
24V
Air Conditioner
NOTE Non Powered Accessories will require a jumper from RH | RC to ACC1, ACC2, ACC3 for a 24V feed.
factory installed jumper.
Diagram indicates 24V humidier terminal. If your furnace control board does not have this, you must use a 110V/24V step down transformer.
Two Stage Heat/ Single Stage Cool With 3 Accessories
Dehumidier
HRV
C
24V
C
24V
C
24V
Hum
C
HRV
Humidier
Dehumidier
Dual Stage Heat, Single Stage Cool with Three Accessories