Ecobee ecobee3 - Wiring Diagram: Conventional Heating and Cooling; Air Conditioner and Furnace Connections; Two-Stage Heating and Cooling Wiring

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Conventional heating and cooling (up to 2 stages
each)
Rc
G
Y1
W1
(AUX1)
O/B
ACC–
ACC+
W2
(AUX2)
Y2
Air Conditioner
Y1 Y2 C
Furnance
Y1 Y2 W1 W2 R C G
C
R
H
Do not jumper Rc or Rh ecobee
3
does this automatically. R can go into
either Rc or Rh terminals on your ecobee3.
Stage 2 heat and cool if applicable