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9. Factory Reset
To RESET RT520RF thermostat to it's factory default settings please follow steps below:
1
To reset the thermostat press and
hold together
buttons for 5 seconds.
10. Error codes
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 different error codes.
11. Battery change
Turn the thermostat over so that the back is in front of you. Now look at the picture below:
34
2
PLEASE NOTE: User settings will not
+
+
INSERT THE BATTERIES, PAYING ATTENTION TO THEIR POLARITY!
3
Thermostat has been reseted.
be deleted.
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