Section 11. Electrical - Low Voltage - Trane 4TTR3 Installation And Operation 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
Thermostat
24 VAC HOT
FAN
24 VAC
Common
SOV
COOL/HEAT
1st STAGE
HEATING
2nd STAGE
EMERGENCY
HEAT
• Units with pigtails require wirenuts for connections. Cap all unused wires.
• In AC systems for multiple stages of electric heat, jumper W1 and W2 together if comfort control has only one stage of heat.
• TEM3/4 - Bypass air handler and connect Y from comfort control directly to OD unit
* TEM6 Only
** 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
• TAM4 only - Wire as shown, no BK is available
• 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
18-AC79D1-10E-EN
With TEM 3, 4, 6, 8
Outdoor
Air Handler
Unit
R R
G G
**
B
B/C B
Blue
O
Y1
Y Y
Y2
*
W1
W1
White
W2
W2
Pink
BK BK
WH/BLK WH/BLK
Table 11.1
24 VOLTS
WIRE SIZE
18 AWG
16 AWG
14 AWG
With TAM 4, 7, 9
Thermostat Air Handler
R R
24 VAC HOT
G G
FAN
B
24 VAC B/C
Common
Blue
O
SOV
COOL/HEAT Y
Y
1st STAGE
l l
Y
O
W1
HEATING
W1
2nd STAGE
White
EMERGENCY W2
W2
HEAT
Pink
BK BK
WH/BLK WH/BLK
MAX. WIRE LENGTH
150 Ft.
225 Ft.
300 Ft.
Outdoor
Unit
B
Y
O
9