Viessmann Flue gas system Installation Instructions Manual page 23

Connection to a moisture-resistant chimney (cont.)
Plug-in adaptor
A
Flue gas
B
Secondary ventilation
C
MR chimney
D
Inspection aperture
E
Ventilation air
F
22
Boiler flue connection
1
Flue Pipe
2
2 m long
1 m long
0.5 m long
Inspection piece, straight
4
Flue bend
5
87° or 2 x 45°
or
Inspection tee
87°