Pub. No. 18HD50D1-1A-EN 12/2018 Part No. 37-7768003 7
Trane XR203 Programmable Thermostat
NOTES:
1) Wire third party condensate overow
switches between Y of the thermostat
and Y1 of the airow control board
2) X2 is required to energize aux heat
during defrost
1 or 2 Stage Heat Pump with S9V2 Furnace
Indoor Unit Outdoor UnitThermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2
R R
OO
Y1
G
W1
B
Y2
W2
W2
W2
W3
W2
BK
B
X2
Y2
Y/Y1
NOTES:
1) Wire third party condensate overow
switches between Y of the thermostat
and Y1 of the airow control board
2) X2 is required to energize aux heat
during defrost
Heat Pump with Variable Speed Gas Furnace
Indoor Unit Outdoor UnitThermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2
R R
O
Y
G
W1
B
W2
W2
B
X2
Y