Filling The Heating System; Further Details Regarding The Individual Steps - Viessmann VITOPEND 200 Installation And Service Instructions Manual

Initial start-up, 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 with water.
&
Only use fill water of potable quality.
&
Fill water with a water hardness in excess of 3.58 mmol/l must be sof-
tened, e.g. with the small softening system for heating water (see the
Vitoset pricelist).
&
An anti‐freeze additive suitable for heating systems can be mixed into
the fill water.
A Close the boiler fill & drain valve
1. Check the inlet pressure of the dia-
phragm expansion vessel.
2. Close the gas shut‐off valve.
20
3. Fill the heating system at the fill
valve in the heating return (on the
connection set or on site). Minimum
system pressure > 0.8 bar).
Note
If the control unit has not been
switched ON prior to filling the sys-
tem, then the servo drive of the
diverter valve will still be in its cen-
tre position, and the system will be
completely filled.
4. If the control unit had already been
switched ON before filling began:
Start the control unit and activate
the fill program via coding address
"2F:2".
Note
To call up coding level 1 and for
setting the coding address, see
page 50.
For function and details of the fill
program, see page 105.
Whilst the fill program runs, the dis-
play shows "bF" (Vitotronic 100) or
"Filling" (Vitotronic 200).