Trane 7CONT624AS42DA User's Manual And Installation Instructions page 27

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
(BAYSEN03ATEMPAA) required for dual fuel, oil furnace applica-
tions
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
(BAYSEN03ATEMPAA) required for dual fuel, oil furnace
applications
2. Field supplied relay (R1) required for oil burner primary
Installer's Guide
Variable Speed
Oil Furnace
B/C
R
W1
R1
(Note 4) W2
O
G
Y1
(Note 3)
Y2
BK
(Note 1)
(Note 4)
Non-Variable Speed
Oil Furnace
B/C
R
BT
W1
R1
(Note 1)
(Note 2) W2
G
Y
Oil Burner Primary
T
R1
T
(Note 2)
Thermostat Connection
C
R
BT
W1
(Note 2)
W2
O/B
G
Y1
Y2
Oil Burner Primary
Remote Tempurature Sensor Connections and Operation:
T
Sensor Options in the Installer Settings/Sensor Settings menu
R1
Remote Sensor (connect to the RS terminals)
T
- 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 Tempurature 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
RS
Remote
Sensor
RS
ODT
Outdoor
Sensor
ODT
NO
C
Aux relay
outputs
NC
Remote
Sensor
Outdoor
Sensor
Aux relay
outputs
27