Further Details Regarding The Individual Steps; 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 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 inlet pressure of the dia-
phragm expansion vessel.
2. Close the gas shut-off valve.
3. Fill the heating system via the boil-
er fill & drain valve A in the heat-
ing return (at the connection set or
on site). (Minimum system pres-
sure > 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 cen-
tral position, and the system will be
completely filled.
Commissioning, inspection, maintenance
4. If the control unit had already been
switched ON before filling began:
Switch ON the control unit and acti-
vate the fill program via coding
address "2F:2".
5. Close boiler fill & drain valve A.
6. Close the shut-off valves on the
heating water side.
3
, e.g. using a
7