Trane NEXIA XR724 User's Manual And Installation Instructions page 22

Heat/Cool Wiring Diagrams
Heat/Cool Diagram 5: 1 Stage Cooling w/GAF2-S Model Air Handler
One Stage
Cooling Only
B
Y
Heat/Cool Diagram 6: 1 Stage cooling w/GAF2-36M Model Air Handler
One Stage
Cooling Only
B
Y
Notes:
1. "YI" and "YO" connections must be made as shown for freeze
protection and internally mounted condensate overflow circuits to
work properly
2. If third party condensate overflow switches are installed, they
should be wired between "Y1" of the thermostat and "YI" of the
airflow control board
22
XR724 INSTALLER'S GUIDE
Non-VS
Air Handler &
Electric Heat
B/C
R
W1
G
Non-VS
Air Handler &
Electric Heat
B/C
R
W1
O
G
YI (In)
(Note 1) (Note 2)
YO
Thermostat Connection
BK
C
RS
R
RS
W1
W2
ODT
ODT
O/B
NO
G
C
Y1
NC
Y2
Remote Temperature Sensor Connections and Operation:
Sensor Options in the Installer Settings/Sensor Settings menu
Remote Sensor (connect to the RS terminals)
- None
- Replaces internal sensor
- Average with internal sensor
Outdoor Temp Sensor (connect to the ODT terminals)
- None
- Outdoor
Caution: Do not run sensor wires in the same bundle with HVAC
wires. Keep away from high voltage wiring to avoid interference.
Thermostat Connection
BK
C
RS
R
RS
W1
W2
ODT
ODT
O/B
NO
G
C
Y1
NC
Y2
Remote Temperature Sensor Connections and Operation:
Sensor Options in the Installer Settings/Sensor Settings menu
Remote Sensor (connect to the RS terminals)
- None
- Replaces internal sensor
- Average with internal sensor
Outdoor Temp Sensor (connect to the ODT terminals)
- None
- Outdoor
Caution: Do not run sensor wires in the same bundle with HVAC
wires. Keep away from high voltage wiring to avoid interference.
Remote
Sensor
Outdoor
Sensor
Aux relay
outputs
Remote
Sensor
Outdoor
Sensor
Aux relay
outputs
18-HD82D1-1B-EN