Viessmann VITODENS 111-W Installation And Service Instructions Manual page 21

Further details regarding the individual steps
A C B
Commissioning, inspection, maintenance
(cont.)
4. Open shut-off valves A and (if instal-
led) B.
5. Connect fill hose to tap C and open
tap C.
6. Fill heating system. (Minimum sys-
tem pressure > 0.8 bar).
7. Close tap C.
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