Ecobee ecobee3 lite Installation Manual - page 33
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Rc
G
Y1
W1
(AUX1)
O/B
ACC–
ACC+
W2
(AUX2)
Y2
C
R
H
R C G
Y W
Wire 1
1–wire accessory
(humidifier/dehumidifier/ventilator)
Furnace control board
Accessory
Warning!
Damage may occur if accessory is connected
to ACC-.
*ecobee3 automatically connects Rc to ACC- when 1-wire configuration
is selected during accessory setup.
*