Trane NEXIA XR724 User's Manual And Installation Instructions page 35

Dual Fuel Wiring Diagrams
Dual Fuel Diagram 3: 1 or 2 Stage Heat Pump w/Variable Speed Oil Furnace
One or Two Stage
Heat Pump
B
R
X2
O
Y 1
Y2
Notes:
1. Cut/remove the factory installed "BK" jumper at the indoor unit
2. BT (Bonnet Thermostat) model THT1248 required for
dual fuel, oil furnace applications
3. For non-Trane/American Standard indoor units "BK" is not
connected and "Y1"/"Y2" must be connect at indoor unit
4. Field supplied relay (R1) required for oil burner primary
Dual Fuel Diagram 4 : 1 Stage Heat Pump w/non-Variable Speed Oil Furnace
Single Stage
Heat Pump
B
R
X2
O
Y
Notes:
1. BT (Bonnet Thermostat) model THT1248
required for dual fuel, oil furnace applications
2. Field supplied relay (R1) required for oil burner primary
18-HD82D1-1B-EN
XR724 INSTALLER'S GUIDE
Variable Speed
Oil Furnace
B/C
R
W1
R1
(Note 4) W2
O
G
Y1
(Note 3)
Y2
BK
(Note 1)
Non-Variable Speed
Oil Furnace
B/C
R
BT
W1
R1
(Note 2)
W2
G
Y
Oil Burner Primary
R1
(Note 2)
Thermostat Connection
BT
(Note 2)
Oil Burner Primary
Remote Temperature Sensor Connections and Operation:
T
Sensor Options in the Installer Settings/Sensor Settings menu
R1
Remote Sensor (connect to the RS terminals)
T
(Note 4)
- 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
C
R
W1
(Note 1)
W2
O/B
G
Y1
Y2
T
T
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.
BK
C
RS
R
RS
W1
W2
ODT
ODT
O/B
NO
G
C
Y1
NC
Y2
BK
RS
Remote
Sensor
RS
ODT
Outdoor
Sensor
ODT
NO
C
Aux relay
outputs
NC
Remote
Sensor
Outdoor
Sensor
Aux relay
outputs
35