2 Installation
This system MUST be fitted by a qualified and
approved installation engineer, proceeding as
shown in the illustrations on pages 54 to 59.
The relevant safety guidelines should be
followed at all times.
Adjust the Vaillant heating system as shown
on page 59.
Two-point or constant regulation (page 56)?
Two-point regulation (factory-adjust-
ment) is required if the power rating
of the heating system is considerably
more than the calculated heat
requirement (e.g. in order to achieve
a greater hot-water capacity).
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