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Further details regarding the individual steps
Filling the heating system
!
Please note
Unsuitable fill water increases the level of deposits and corrosion and
may lead to boiler damage.
Thoroughly flush the entire heating system prior to filling it with water.
Only use fill water of potable quality.
Soften fill water with hardness exceeding 3.0 mol/m
small softening system for heating water (see Viessmann Vitoset price
list).
An antifreeze additive suitable for heating systems can be mixed with
the fill water. The antifreeze manufacturer must verify its suitability.
1. Check the pre-charge pressure of
the diaphragm expansion vessel.
Commissioning, inspection, maintenance
3
, e.g. using a
7
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