Viessmann Vitodens 100 Series Installation And Service Instructions Manual page 24

Installation sequence
Mounting the boiler and making connections
5. Connect the balanced flue connec-
tion pipe from the inside and route
with a fall of min. 3° (approx.
50 mm/m) towards the boiler in
order to prevent condensate escap-
ing to the outside.
24
1.
(cont.)
2.
3.