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9. TEMPERATURE SENSORS USED FOR REGULATION
9.1 Temperature sensors
Thermostat can measure temperature from two different sensors:
 Internal sensor: this sensor is embedded on thermostat.
 External sensor: This sensor is plugged at the back of thermostat. It can be used as "ambient"
temperature sensor or as floor temperature sensor depending of regulation configuration.
9.2 Description of regulation configurations
Heating and cooling regulation can use two different temperature sensor. With respect of
external sensor connection, installer can choose a regulation type in parameter 20 in installer
menu (see paragraph 8 "Installer parameters").
Regulation
configuration
AIR
Amb
FLR
FLL
Important points:
 to be able to select "Amb", "FLR" or "FLL" regulations in installer menu, external sensor has
to be connected to thermostat.
 If there is an error with external sensor and if installer/user goes to parameter menu n°20,
"AIR" regulation will be selected automatically and external sensor error could be deleted
if thermostat is turned off.
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Sensor
displaying
Internal
External
External
Internal &
external
LCD
Air regulation is done with internal sensor.
Sensor measures temperature at the
thermostat position.
Ambient regulation is done with external
sensor.
Sensor measures at a different position than
thermostat position.
Floor regulation is done with external sensor.
External sensor is connected to digital
thermostat and placed "in the floor".
Floor limit regulation with external sensor
and internal sensors.
External sensor is connected to digital
thermostat and placed "in the floor".
This measurement permits to check floor
temperature limits. Internal sensor is used to
do temperature regulation.
Description