Viessmann Flue gas system Installation Instructions Manual page 15

Routing through a duct (cont.)
Combustion air
A
Flue gas
B
Secondary ventilation
C
Room interconnection aperture
D
Inspection aperture
E
14
Boiler flue connection
1
Standard duct pack
2
Comprising:
Support bend
n
Support rail
n
Duct cover
n
Spacers (3 pce.)
n
Flue Pipe
3
2 m long
1 m long
0.5 m long
Flue bend (for use in corbelled chimneys)
30° or 15°
Inspection piece, straight
4
Balanced flue inspection piece, straight
5
Balanced flue room interconnection bezel
6
Balanced flue pipe
7
1 m long
0.5 m long
Balanced flue bend
8
87° or 2 x 45°
or
Balanced flue inspection tee
or
Balanced flue inspection bend