Trane XR203 - Page 13

Pub. No. 18HD50D1-1A-EN 12/2018 Part No. 37-7768003 13
Trane XR203 Programmable Thermostat
G
NOTES:
1) Wire third party condensate overow
switches between Y of the thermostat
and Y1 of the airow control board
2) X2 is required to energize aux heat
during defrost
Cooling with GAF2-S
Indoor Unit Outdoor UnitThermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2
R
W1
B
B
Y