Trane 4TWB4018G Installer's Manual page 14

Variable Speed Furnace
Hook-up Diagram
Comfort Control
Red
R
Y1 Yellow
Green
G
White
W1
X2
Blue
B
Orange
O
*AM7 Air Handler
Hook-up Diagram
Comfort Control
X2
W White
Green
G
Y1 Yellow
O Orange
Red
R
Blue
B
Field wiring
14
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Variable Speed
Furnace
Red
R
Y
LO
Yellow
Y
BK
G
W1
W2
B
O
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Air Handler
W3
W2
W1 - White
W1
G
YI (In)
O O - Orange
R R - Red
B B - Blue
(Out)
YO
Y1 - Yellow
DH/BK
Heat Pump
Red
Black
Blue
(X2)
Yellow
Black
Blue
Orange
Heat Pump
Black
(X2)
Orange
Blue
Yellow
Red
Must configure to
"OFF" for HP Units.
Must configure to "OFF" for
single-stage compressors.
Orange
Notes:
1. Comfort control must
be dual fuel capable
or use accessory
TAYPLUS103A.
2. Ylo and BK may not be
present on unit.
3. W1 - X2 is a field
installed jumper.
Control Board
OUTDOOR OUTDOOR
on
} Capacity (Tons)
AC (System)
HP
1 2 (Stages)
1 2 (Compressor)
R4
S1
1 INDOOR
R NET 1
on
R NET 2
CFM/Ton
R1
U1
Cool Off Delay
R13
Torque
CFM
R14
D9
S2
C10
+12V
R22
18-BC77D1-6