Trane 4TTZ0 Installer's Manual page 14

TAM7 Air Handler
with 24 Volt Control
Hook-up Diagram
Comfort Control
X2
W
G
Y1
O
R
B
Y2
Field wiring
Note:
1. * For multiple stages of electric heat, jumper W1, W2, and W3 together if comfort control has only one stage of heat.
2. YI and YO connections must be made as shown for freeze protection and internally mounted condensate overflow circuits to
work properly.
3. If a 3rd party condensate overflow switch is installed, it should be wired in series between YO and Y to the outdoor unit.
4. Air conditioner models do not use the Black (X2) or Orange wires from the outdoor unit.
5. For non-communicating applications, use 24 volt harness accessory BAYACHP024A.
TAM7 Air Handler with 24 Volt Control
Hook-up Diagram (Continued)
OUTDOOR OUTDOOR
Control
Board
HP
1
1
R4
1
R NET 1
R NET 2
R1
U1
R13
R14
14
TAM7 Air Handler
24 Volt
W3 *
W2
White
W1
Green
BK
Yellow
G
Orange
Y2
Red
YI
Blue
O
Brown
R
B
YO
on
}
Capacity (Tons)
AC (System)
2 (Stages)
2 (Compressor)
S1
INDOOR
on
CFM/Ton
Cool Off Delay
Torque
CFM
D9
S2
C10
+12V
R22
Air Conditioner
or Heat Pump -
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
W1 - White
Y2 - Brown
(In)
O - Orange
R - Red
B - Blue
(Out)
Y1 - Yellow
Must configure to "OFF" for heat pump.
Must configure to "ON" for 20 SEER (2 stages)
Must configure to "ON" for 20 SEER
(2 compressors)
Note 4
Black
(X2)
Yellow/Red
Red
Orange
Note 5
Yellow
Blue
18-BC53D2-6