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With Furnace
Thermostat
R
24 VAC HOT
G
FAN
24 VAC
B/C
Common
Y1
COOL
HEATING
W1
W2
*
• Units with pigtails require wirenuts for connections. Cap all unused wires.
• In AC systems for multiple stages of heat, jumper W1 and W2 together if comfort control has only one stage of heat.
* If equipped with second stage heat
** When using a BK enabled comfort control, cut BK jumper and bypass Y and YLo at the furnace. Connect BK from comfort control to
BK of the furnace
14
Outdoor
Furnace
Unit
R
G
B
B
Y
Y
W1
W2
With Variable Speed Furnace
Thermostat
Furnace
R
R
24 VAC HOT
G
G
FAN
24 VAC
B/C
B
Common
O
Y1
Y
COOL
**
Y
LO
W1
W1
HEATING
W2
W2
*
BK
BK
**
Outdoor
Unit
B
Y
88-A4AC6001-1D-EN
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