Field Wiring Diagrams
Heat/Cool Wiring Diagrams
Heat/Cool Diagram 1: 1 or 2 Stage Cooling w/TAM7 Model Variable Speed Air Handler
or TAM9 24V mode
One or Two Stage
Cooling Only
B
R
Y 1
Y2
Notes:
1. Cut/remove the factory installed "BK" jumper at the indoor unit
2. "Y2" & "R" connections at outdoor are only required for two
stage units
3. Jumper "W2" to "W3" if three stages of indoor heat are available
4. "YI" and "YO" connections must be made as shown for freeze
protection and internally mounted condensate overflow circuits to
work properly
5. If third party condensate overflow switches are installed, they
should be wired between "Y1" of the thermostat and "YI" of the
airflow control board
Heat/Cool Diagram 2: 1 Stage Cooling w/GAM5A & TAM4 Model Air Handler
One Stage
Cooling Only
B
Y
Notes:
1. Jumper "W2" to "W3" if three stages of indoor heat are 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 third party condensate overflow switches are installed, they
should be wired between "Y" of the thermostat and "YI" of the
airflow control board
20
XR724 INSTALLER'S GUIDE
VS Air Handler &
Electric Heat
B/C
R
(Note 2)
W1
W2
W3
(Note 3)
G
YI (In)
(Note 5)
YO
(Note 4)
Y2
(Note 2)
BK
(Note 1)
Non-VS
Air Handler &
Electric Heat
B/C
R
W1
W2
W3
(Note 1)
O
G
YI (In)
(Note 2)
YO
(Note 3)
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
Aux relay
outputs
Remote
Sensor
Outdoor
Sensor
Aux relay
outputs
18-HD82D1-1B-EN