Field Wiring - Trane A4AH5E19A1B30A Installer's Manual

Field Wiring

HEAT PUMP SYSTEMS
Thermostat
R
24 VAC HOT
G
FAN
24 VAC
B/C
Common
O
SOV
COOL/HEAT
Y
1st STAGE
HEATING
W
2nd STAGE
EMERGENCY
X2
HEAT
18-GF15D1-1B-EN
Figure 4. Field Wiring Diagram — A4AH5E*
Outdoor
Air Handler
Unit
R R
G
B
B
Blue
O
Y
W1
White
X2
W2
Pink Black
In AC systems for multiple stages of electric heat, jumper W1
and W2 together if comfort control has only one stage of heat.
AC SYSTEMS
Thermostat
R
24 VAC HOT
G
FAN
24 VAC
B/C
Common
COOLING
Y
HEAT
W
Outdoor
Air Handler
Unit
R
G
B
B
Blue
Y
W1
White
W2
Pink
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