Danfoss DEVIreg Basic Installation Manual page 18

DEVIreg™ Basic
Selecting the timer schedule / app communication mode the device will
be connectable in the DEVI control app, the communication is done via
Bluetooth 4 .2, where temperatures, settings, schedule, limits and more
can be set to the desired level .
Selecting the OFF mode will disable the thermostat completely .
When the thermostat is in all other positions than Timer schedule/App
communication the app can only display limited information, in OFF the
app and thermostat will be completely OFF and nothing will be indicated
or communicated to the app .
To pair the thermostat with the app, place the thermostat in the App
communication position and start the process in the app , the device will
blink with the communication indicator . After the app has initiated the
communication with the thermostat, the user needs to turn the dial out
to manual temperature setting and back into the App communication
position, this is to validate with what thermostat the paring is wanted .
Installation Guide 19