18-AC104D1-1E-EN
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11.2 Low Voltage Hook-up Diagrams
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.
Table 11.1
24 VOLTS
WIRE SIZE
MAX. WIRE LENGTH
18 AWG
150 Ft.
16 AWG
225 Ft.
14 AWG
300 Ft.
With TEM 3, 4, 6, 8
Thermostat
Air Handler
Outdoor
Unit
R
G
B
W1
W2
R
B
O
Y
X2
R
G
B/C
O
Y
W
Blue
24 VAC HOT
FAN
24 VAC
Common
SOV
COOL/HEAT
1st STAGE
HEATING
2nd STAGE
EMERGENCY
HEAT
Pink
Black
White
X2
O
Y*
With TAM 4, 5, 7, 9
Thermostat
Air Handler
Outdoor
Unit
R
G
B
W1
W2
R
B
O
Y
O
Y
O
X2
R
G
B/C
O
Y
l
W
Blue
O
Y
l
24 VAC HOT
FAN
24 VAC
Common
SOV
COOL/HEAT
1st STAGE
HEATING
2nd STAGE
EMERGENCY
HEAT
Pink
Black
White
X2
•
Units with pigtails require wirenuts for connections.
•
In AC systems for multiple stages of electric heat, jumper W1 and W2 together if comfort control has only one stage of heat.
* Y2 for TEM6
