Viessmann VITODENS 111-W Installation And Service Instructions Manual page 28

Commissioning, inspection, maintenance
Further details regarding the individual steps
A C
B
28
C
4. Open shut-off valves A and B.
5. Open taps C and fill the heating sys-
6. Close taps C.
7. Remove connection line between
(cont.)
tem. (Minimum system pressure
> 0.8 bar (80 kPa).
both valves C. In operation the con-
nection must be interrupted.