Thermor Riva 3 mixte Notice D'installation Et D'utilisation page 41

Extending the device's lifetime
Perform this operation once per year to increase your device's lifetime
and optimise its operation:
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Switch the device off:
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Wait at least one hour (cool-down time);
-
Be sure to remove towels from the device, protect your wall and
yourself (wearing recommended glasses);
-
Use the key provided in the wall support kit and follow the steps.
(No contractual photo)
Store the key in a clean and dry place (at ambient temperature).
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