American Standard NEXIA Silver 724 User's Manual And Installation Instructions page 26

Heat/Cool Wiring Diagrams
Heat/Cool Diagram 13: 1 Stage Cooling w/non-Variable Speed Oil Furnace
One Stage
Cooling Only
B
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
Heat/Cool Diagram 14: 1 or 2 Stage Cooling w/Variable Speed Oil Furnace
One or Two Stage
Cooling Only
B
R
(Note 2)
Y 1
(Note 2)
Y2
Notes:
1. Cut/remove the factory installed "BK" jumper at the indoor unit
2. "Y2" & "R" connections at outdoor unit are only required for 2
stage systems
3. For non-Trane/American Standard Indoor units "BK" is not
connected and "Y1"/"Y2" must be connected at indoor unit.
4. BT (Bonnet Thermostat) model THT1248)
required for dual fuel, oil furnace applications
5. Field supplied relay (R1) required for oil burner primary
26
SILVER 724 INSTALLER'S GUIDE
Non-VS
Oil Furnace
B/C
R
W1
R1
W2
(Note 2)
G
Y
Oil Burner Primary
R1
(Note 2)
Variable Speed
Oil Furnace
B/C
R
W1
R1
W2
(Note 5)
O
G
Y1
(Note 3)
Y2
BK
(Note 1)
Thermostat Connection
C
BT
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 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
BT
(Note 4)
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 5)
- 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
RS
R
RS
ODT
ODT
NO
C
NC
BK
C
RS
R
RS
W1
W2 ODT
ODT
O/B
NO
G
C
Y1
NC
Y2
Remote
Sensor
Outdoor
Sensor
Aux relay
outputs
Remote
Sensor
Outdoor
Sensor
Aux relay
outputs
11-HD16D1-1E-EN