Viessmann Vitodens 100 Series Installation And Service Instructions Manual page 38

Commissioning, inspection, maintenance
Further details regarding the individual steps
38
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07. Please note
If the system pressure falls
below 0.08 MPa, the circu-
lation pump will suffer dam-
age.
In the event of a pressure
drop immediately top up the
water.
Ensure a minimum system
pressure of > 0.08 MPa
during the filling and venting
process.
08. For activating the filling and vent-
ing function, see next chapter.
09. After the system has been fully
charged and vented, turn OFF the
ON/OFF switch at the control unit.
The function will also terminate
automatically after 30 min.
10. Close the fill valve.