Trane 7CONT624AS42DA User's Manual And Installation Instructions page 20

Heat Pump Wiring Diagrams
Heat Pump Diagram 1: 1 or 2 Stage Heat Pump w/TAM7 Model Variable Speed Air Handler
One or Two stage
Heat Pump
Notes:
1. Cut/remove the factory installed "BK" jumper at the indoor unit
2. Jumper "W2" to "W3" if three stages of indoor heat is available
3. "YI" and "YO" connections must be made as shown for freeze
protection and internally mounted condensate overflow circuits to
work properly
4. If 3rd party condensate overflow switches are installed, they
should be wired between "Y1" of the thermostat and "YI" of the
airflow control board
Heat Pump Diagram 2: 1 Stage Heat Pump w/"GAM5A" & "TAM4" Model Air Handler
One stage
Heat Pump
B
R
X2
O
Y
Notes:
1. Jumper "W2" to "W3" if three stages of indoor heat is available
2. "YI" and "YO" connections must be made as shown for freeze
protection and internally mounted condensate overflow circuits to
work properly.
3. If 3rd party condensate overflow switches are installed, they
should be wired between "Y" of the thermostat and "YI" of the
airflow control board.
20
Variable Speed Air
Handler & Electric Heat
B
B/C
R
R
W1
W2
X2
W3
(Note 2)
O O
G
Y1
Y2 YI (In)
YO
(Note 3)
Y2
BK
(Note 1)
Variable Speed Air
Handler & Electric Heat
B/C
R
W1
W2
W3
(Note 1)
O
G
Y I
(Note 2)
Y O
Installer's Guide
Thermostat Connection
C
R
W1
W2
O/B
G
Y1
Y2
(Note 4)
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.
Thermostat Connection
C
R
W1
W2
O/B
G
Y1
Y2
(Note 3)
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
BK
RS
Remote
Sensor
RS
ODT
Outdoor
Sensor
ODT
NO
C
Aux relay
outputs
NC