Viessmann VITOTRONIC 300 Installation And Service Instructions Manual page 117

Weather-compensated digital boiler and heating circuit control
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Code 2
Coding in the delivered condition
Boiler circuit/mixer circuit
*1
Change the code for the heating circuit without mixer A1 for boilers without lower
temperature limit or for mixer circuit, if the remote control affects that heating circuit.
Possible change
¢
117

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