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4.9 Language
To choose language follow steps below:
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Press .
Using
or move between
parameters.
Using
or choose your
language.
Press
to confirm.
Thermostat will go to the main
screen with saving the changes.
3
4 5 6
Press to enter
language settings.
5. Factory Reset
Thermostat has been reseted.
PLEASE NOTE: User settings will not
be deleted.
To reset the thermostat press and
hold together + +
buttons for 5 seconds.
To RESET RT520 thermostat to it’s factory default settings please follow steps below:
Turn the thermostat over so that the back is in front of you. Now look at the picture below:
INSERT THE BATTERIES, PAYING ATTENTION TO THEIR POLARITY!
Thermostat will display errors only when it’s connected to the boiler by OPENTHERM terminals (A / B). Please refer then to boiler manual. Each
boiler can have dierent error codes.
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6. Error codes
7. Battery change
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