21
18-HD82D1-1B-EN
XR724 INSTALLER’S GUIDE
Heat/Cool Diagram 3: 1 Stage Cooling w/“GAM5B” Model Air Handler
G
W1
Y
R
B/C
W2
B
Y
Notes:
1. Jumper “W2” to “W3” if three stages of indoor heat is available
2. “Y” terminal must be connected at indoor unit for high stage
airflow.
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 Temperature Sensor Connections and Operation:
Aux relay
outputs
RS
C
RS
R
ODT
W1
W2
BK
ODT
NO
C
Y1
NC
Y2
O/B
G
Thermostat Connection
Outdoor
Sensor
Remote
Sensor
W3
Non-VS
Air Handler &
Electric Heat
One Stage
Cooling Only
(Note 1)
(Note 2)
O
Non-VS
Air Handler &
Electric Heat
Heat/Cool Diagram 4: 2 Stage Cooling w/GAM5B Model Air Handler
G
W1
Y
R
B/C
Y2
W2
Two Stage
Cooling Only
Y1
R
B
Y2
Notes:
1. Jumper “W2” to “W3” if three stages of
indoor heat are available
2. “Y” must be connected at indoor unit
for cooling airflow
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 Temperature Sensor Connections and Operation:
(Note 1)
(Note 2)
Aux relay
outputs
RS
C
RS
R
ODT
W1
W2
BK
ODT
NO
C
Y1
NC
Y2
O/B
G
Thermostat Connection
Outdoor
Sensor
Remote
Sensor
W3
(Note 2)
Heat/Cool Wiring Diagrams
Summary of Contents for NEXIA XR724
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