American Standard NEXIA Silver 724 User's Manual And Installation Instructions page 34

Dual Fuel Wiring Diagrams
Dual Fuel Diagram 1: 1 or 2 Stage Heat Pump w/Variable Speed Gas 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. For non-Trane/American Standard Indoor units "BK" is not
connected and "Y1"/"Y2" must be connected at indoor unit.
3. Outdoor Sensor required for dual fuel restricted mode.
Dual Fuel Diagram 2: 1 Stage Heat Pump w/non-Variable Speed Gas Furnace
Single Stage
Heat Pump
B
R
X2
O
Y
Note:
1. Outdoor Sensor required for dual fuel restricted mode.
34
SILVER 724 INSTALLER'S GUIDE
Two Stage Variable
Speed Gas Furnace
B/C
R
W1
W2
O
G
Y1
(Note 2)
Y2
BK
(Note 1)
Non-VS One or Two
Stage Gas Furnace
B/C
R
W1
W2
G
Y
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
(Note 3)
Aux relay
outputs
Remote
Sensor
Outdoor
Sensor
(Note 1)
Aux relay
outputs
11-HD16D1-1E-EN