Setting and using method
n Details of Installation for thermostat
1) In case of Occupancy sensor,
- When motion is detected by the sensor, Indoor unit is enabled.
- Otherwise, Indoor unit is disabled.
2) In case of Emergency Stop or Security option.
- When emergency condition occurs, Indoor unit is disabled.
- Otherwise, Indoor unit is enabled.
L
AC 24 V
N
16 Dry contact for thermostat
C
R
Security
Emergency Stop
Occupancy Sensor
Reference Cases
n For conventional thermostat signal input
AC 24 V
Thermostat Fan & System Switch
FAN
MODE
Operation
[Auto / On]
[Cool / Heat / Off]
-
-
-
0
OFF
-
1
RT > SP
1
Cool
Auto
RT < SP
1
RT < SP
1
Heat
RT > SP
1
FAN
-
1
RT > SP
1
Cool
RT < SP
1
ON
RT < SP
1
Heat
RT > SP
1
Notes
• IDU Fan logic, depending on model selected, may delay IDU fan operation momentarily during a cold
start heat call. This function allows IDU coil to warm up prior to operating fan in some IDU models.
• Thermostats that use resistive anticipation are not supported at this time.
• Verify documentation of desired thermostat so that the logic is same as shown in the table above.
Setting and using method
Thermostat
LG does not supply this section
L
(Field supply)
N
L
L L
C
R G W Y
Input
IDU Response
FAN
HEAT
COOL
[Mode / Thermal / Fan]
[G]
[W]
[Y]
-
-
-
Disable Operation
0
0
0
Off
1
0
1
Cool / On / On
0
0
0
Enable
1
1
0
Heat/ On/On
0
0
0
Off
1
0
0
Fan/ Off/ On
1
0
1
Cool/ On/ On
1
0
0
Fan/ Off/ On
1
1
0
Heat/ On/ On
1
0
0
Fan/ Off/ On
※ RT : Room Temperature
※ SP : Set Point
Installation manual 17