Viessmann Vitoladens 300-W Installation And Service Instructions Manual page 116

Final decommissioning and disposal
Viessmann products can be recycled. Components
and substances from the system are not part of ordi-
nary household waste.
For decommissioning the system, isolate the system
from the power supply and allow components to cool
down where appropriate.
All components must be disposed of correctly.
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