Pub. No. 18HD55D1-1C-EN 09/2020
Part No. 37-7790003
5
Trane XR103 Non-Programmable Thermostat
4.4 Wiring Diagrams
NOTES:
1) Wire third party condensate overflow
switches between Y of the thermostat
and Y1 of the airflow control board
2) X2 is required to energize aux heat
during defrost
Heat Pump with TAM Series 24V
Indoor Unit
Outdoor Unit
Thermostat
R
O/B
Y
G
E
C
L
W2
R
R
O
O
Y1
G
W1
B
Y0
Y2
W2
W2
W2
W3
W2
BK
B
X2
Y/Y1
NOTES:
1) Wire third party condensate overflow
switches between Y of the thermostat
and Y1 of the airflow control board
2) X2 is required to energize aux heat
during defrost
Heat Pump with S9V2 Furnace
Indoor Unit
Outdoor Unit
Thermostat
R
O/B
Y
G
E
C
L
W2
R
R
O
O
Y1
G
W1
B
Y2
W2
W2
W2
W3
W2
BK
B
X2
Y/Y1
