Filling The Heating System - Viessmann VITODENS 111-W Installation And Service Instructions Manual

Filling the heating system

!
Please note
Unsuitable fill water increases the level of
deposits and corrosion and may lead to appli-
ance damage.
■ Flush the heating system thoroughly before
filling.
Only fill with water of potable quality.
■
Fill water with a hardness above 300 ppm
■
must be softened.
■ Special antifreeze suitable for heating systems
can be added to the fill water. The antifreeze
manufacturer must verify its suitability.
01. Close the gas shut-off valve.
02. Switch ON the power supply.
03. Tap MODE.
04. / until CONFI flashes.
05. OK to confirm.
"P" is displayed in l.h. display area. The r.h. dis-
play area flashes.
06. Use / to select "12".
07. OK to confirm.
"1" flashes in l.h. display area.
A C B
Fig. 14
11. Open shut-off valves
12. Open valves and fill the heating system. Mini-
C
mum system pressure
13. Close valves C .
C
A and (if fitted) B .
0.8 bar (80 kPa).
>
Commissioning, inspection, maintenance
08. OK to confirm.
"0" flashes in r.h. display area.
09. Use / to select "1".
10. OK to confirm.
Filling is activated. The boiler circuit pump is run-
ning, the 3-way diverter valve moves to its centre
position. This function terminates automatically
after 30 min or when the ON/OFF switch is
switched off.
14. Remove connection line between both valves
During operation, the connection must be inter-
rupted.
C .
19