Section 11. Electrical - Low Voltage - Trane 4TTR7 Series Installer's Manual

Section 11. Electrical - Low Voltage

11.1 Low Voltage Maximum Wire Length
Table 11.1 defines the maximum total length of
low voltage wiring from the outdoor unit, to the
indoor unit, and to the thermostat.
11.2 Low Voltage Hook-up Diagrams
With TEM 6
Thermostat
R
24 VAC HOT
G
FAN
24 VAC B/C
Common
SOV
COOL/HEAT
Y1
1st STAGE
COOL/HEAT
Y2
1st STAGE
HEATING
W1
2nd STAGE
EMERGENCY
W2
HEAT
BK
WH/BLK
• Units with pigtails require wirenuts for connections. Cap all unused wires.
• In systems with multiple stages of electric heat, jumper W1 and W2 together if comfort control has only one stage of heat.
** TEM6 only - When using a BK enabled comfort control, cut BK jumper and bypass Y1 and Y2 at the air handler. Connect BK
from comfort control to BK of the air handler. Install R-O jumper.
• TAM7 only - When using a BK enabled comfort control, cut BK jumper on the AFC and connect BK from comfort control to BK of
the air handler. TAM7 DIP switches must be configured for "AC: 2 Stage/1 Compressor".
18-AC94D1-4C-EN
Outdoor
Air Handler
Unit
R
G
**
B
B
Blue
O
Y1
Y1
Y2
Y2
W1
White
W2
Pink
BK
WH/BLK
WIRE SIZE
18 AWG
16 AWG
14 AWG
With TAM 7
Thermostat Air Handler
R R
24 VAC HOT
G G
FAN
B
24 VAC B/C
Common
Blue
O
SOV
Y
Y
COOL/HEAT
l
1st STAGE l
Y
O
Y2 Y2
COOL/HEAT
2nd STAGE
W1
HEATING
W1
2nd STAGE
White
EMERGENCY W2
W2
HEAT
Pink
BK BK
WH/BLK WH/BLK
Table 11.1
24 VOLTS
MAX. WIRE LENGTH
150 Ft.
225 Ft.
300 Ft.
Outdoor
Unit
B
Y
O
Y2
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