Viessmann VITODENS 100-W Installation And Service Instructions Manual page 49

Commissioning and testing
Venting the boiler by flushing out (after venting system)
(cont.)
4. Open shut-off valves A and B.
5. Connect filling hose to valve C
and open valve C.
6. Fill heating system. (minimum sys-
tem pressure > 1.0 bar).
The actual system pressure is dis-
played electronically on the boiler
display.
7. Close valve C .
1. Connect the drain hose to shut-off
valve D and connect with a drain
outlet.
2. Close shut-off valves A and B.
3. Open valves C and Dand flush at
mains pressure, until no sound of
escaping air can be heard.
4. First shut off valve C and then
valve D.
5. Operating pressure
adjust with valves C and D.
6. Disconnect hoses.
7. Open shut-off valves A and B.
8. Seal shut-off valves C and D with
the caps.
Installation sequence
1.0 bar;
49