Trane XR203 - Stage Heat Pump with GAT2, GAM2, TEM3, TEM4; Or 2 Stage Heat Pump with GAM5 A or TAM4 or GAF2-36 M

Installation and User Guide
12 Pub. No. 18HD50D1-1A-EN 12/2018 Part No. 37-7768003
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
Heat Pump with GAT2, GAM2, TEM3, TEM4
Indoor Unit Outdoor UnitThermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2
R
O
G
W
B
B
X2
Y/Y1
R
W2
W2
NOTES:
1) Wire third party conden-
sate overow switches
between Y of the thermo-
stat and Y1 of the airow
control board
2) X2 is required to energize
aux heat during defrost
1 or 2 Stage Heat Pump with GAM5A OR TAM4 OR GAF2-36M
Indoor Unit Outdoor UnitThermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2
R
O
G
W1
B
B
X2
Y/Y1
R
W2
W3
Y2
Y2
Y0
O
Y1