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Pub. No. 18HD50D1-1A-EN 12/2018
Part No. 37-7768003
9
Trane XR203 Programmable Thermostat
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 Package Unit with Non Variable Speed Blower
Indoor Unit
Thermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2
R
Y1
G
W1
B
Y2
W2
W2/X2
O/B
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
1 or 2 Stage Heat/Cool Package
Indoor Unit
Thermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2
R
Y1
G
W1
B
W2
W2
Y2