Vaillant aroTHERM plus VWL 75/6 A S2 Series Operating Instructions Manual page 49

1.2.4 Risk of material damage caused by
frost
▶ Ensure that the heating installation always
remains in operation during freezing con-
ditions and that all rooms are sufficiently
heated.
▶ If you cannot ensure the operation, have a
competent person drain the heating install-
ation.
1.2.5 Danger caused by improper
operation
Improper operation may present a danger to
you and others, and cause material damage.
▶ Carefully read the enclosed instructions
and all other applicable documents, par-
ticularly the "Safety" section and the warn-
ings.
▶ Only carry out the activities for which in-
structions are provided in these operating
instructions.
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