Viessmann Flue gas system Installation Instructions Manual page 29

Horizontal wall terminal
Note
Not for the Vitocrossal or the Vitoladens.
Route the connecting pipe with a slope of at
least 3° (approx. 50 mm/m).
Combustion air
A
Boiler flue connection
1
Balanced flue external wall
2
connection (incl. wall bezels)
Protective grille
3
Balanced flue pipe
4
1 m long
0.5 m long
Balanced flue bend
5
87° or 2 x 45°
Fixing clamp
28
Flue gas
B