Viessmann Vitodens 100 Series Installation And Service Instructions Manual page 39

Further details regarding the individual steps
Venting the boiler by flushing
A
Activating the filling and venting function
1. Hold down MODE and
neously for approx. 5 s.
■ "SEt" is displayed.
■
flashes.
■ "PL:1" is shown on the additional
display.
2. Press MODE.
3. Use / to select "P02".
4. OK to confirm
5. Use to select "On".
6. OK to confirm
C B
simulta-
Commissioning, inspection, maintenance
(cont.)
1. Connect the drain hose fitted at
shut-off valve A to a drain connec-
tion.
2. Close shut-off valve B.
3. Open valves A and C and flush
at mains pressure until no sound of
escaping air can be heard.
4. First close valve A and after that
valve C.
5. Adjust the operating pressure
≥ 0.8 bar (80 kPa) with valve C.
6. Open shut-off valve B.
7. Disconnect drain hose and keep
safe.
7. Press MODE to exit the menu.
39