Filling The Heating System - Viessmann VITODENS 200-W Service Instructions Manual

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 a water hardness in excess of the following values, e.g.
with a small softening system for heating water (see the Viessmann Vitoset
pricelist):
– Vitodens 200-W to 45 kW: 16.8 °dH (3.0 mol/m
– Vitodens 200-W from 60 kW and multi-boiler systems: 11.2 °dH
(2.0 mol/m 3 )
■ An antifreeze additive suitable for heating systems can be added to the fill
water. The antifreeze manufacturer must verify its suitability.
Commissioning, inspection, maintenance
1. Check the pre-charge pressure of the
diaphragm expansion vessel.
2. Close the gas shut-off valve.
3. Fill the heating system at the boiler
drain & fill valve A (on the connec-
tion set, accessories or on-site). Min-
imum system pressure > 1.0 bar.
4. Close boiler drain & fill valve A.
A
(cont.)
3 )
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