Viessmann Vitodens 100-W WB1B Installation And Service Instructions Manual page 19

Further details regarding the individual steps
Note
If external filling equipment is
installed, it must meet the require-
ments of the Water Fittings Regula-
tions 1999 Section G 24.1 and G 24.2.
Commissioning, inspection, maintenance
(cont.)
4. Open shut-off valves A and (if
installed) B.
5. Connect filling hose to valve C
and open valve C.
6. Fill heating system. (Minimum sys-
tem pressure > 0.8 bar).
7. Close valve C .
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