Further Details Regarding The Individual Steps; Filling The Heating System - Viessmann VITODENS 200-W Service Instructions Manual

Commissioning, inspection, maintenance

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 300 ppm (3.0 mol/m
a small softening system for heating water (see Viessmann Vitoset pricelist).
■ An antifreeze additive suitable for heating systems can be added to the fill
water. The antifreeze manufacturer must verify its suitability.
1. Check the pre-charge pressure of the
diaphragm expansion vessel.
2. Close the gas shut-off valve.
8
3. Fill the heating system via boiler drain
& fill valve A in the heating return (at
the connection set or on site) (mini-
mum system pressure > 1.0 bar).
Note
If the control unit has not been
switched ON prior to filling the sys-
tem, then the servomotor of the
diverter valve will still be in its central
position, and the system will be com-
pletely filled.
Note
If an external filling loop is fitted, it
must meet the requirements of the
Water Fittings Regulations 1999 Sec-
tion G 24.1 and G 24.2.
3)
, e.g. using