Wiring Diagrams; Or 2 Stage Heat Pump With Tam7/Tam9 (24V Mode); Or 2 Stage Cooling With Tam7/Tam9 (24V Mode) - Trane XR203 Installation And User Manual

4.5

Wiring Diagrams

1 or 2 Stage Heat Pump with TAM7/TAM9 (24V Mode)

Thermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2

1 or 2 Stage Cooling with TAM7/TAM9 (24V Mode)

Thermostat
Rc
Rh
O/B
Y
G
W/E
C
L
Y2
W2
Pub. No. 18HD50D1-1A-EN
Indoor Unit
R
O
Y1
G
W1
B
Y0
Y2
W2 W2
W3 W2
W2 BK
Indoor Unit
R
O
Y1
G
W1
B
Y0
Y2
W2 W2
W2 W3
W2 BK
12/2018
Part No. 37-7768003
Outdoor Unit
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
Outdoor Unit
NOTES:
1) Y1 and Y0 connections must be made as shown
for freeze protection and internally mounted
condensate over ow circuits to function properly.
2) Wire third party condensate over ow switches
between Y of the thermostat and Y1 of the air ow
control board
Trane XR203 Programmable Thermostat
R
O
X2
B
Y/Y1
Y2
R
B
Y/Y1
Y2
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