Viessmann vitodens Technical Manual page 142

4.3 Flue gas system components
Balanced flue wall bezel for interconnected air supply
(only for system size ∅ 80 mm)
250
Step in the balanced flue pipe
(e.g. in corbelled ducts)
(2 × 45º balanced flue bends)
Smallest offset (A)
100 mm for system size ∅ 80 mm (C = 222 mm)
120 mm for system size ∅ 100 mm (C = 308 mm):
4
Push two 45º balanced flue bends into each other
then into the balanced flue pipe
A
142
0.6
10
Offset
Depending on the offset (dimension A), insert one balanced flue extension
(dimension B) between both 45º bends.
System size ∅ 60 mm
Offset
Extension
Height
System size ∅ 80 mm
Offset
Extension
Height
System size ∅ 100 mm
Offset
Extension
Height
155
above 100 mm for system size ∅ 80 mm
above 120 mm for system size ∅ 100 mm:
A (mm) 150 200 250 300 350 390
B (mm) 161 232
C (mm) 249 299
A (mm) 150 200 250 300 350 390
B (mm) 122 193
C (mm) 270 330
A (mm) 200 250 300 350 390
B (mm) 170 240
C (mm) 320 360
System Dimension
size [mm]
∅ mm a b
60 60 100
80 80 125
303 373 444 501
349 399 449 489
264 384 405 500
380 430 480 547
310 380 440
410 400 505
VITODENS