Viessmann Vitodens 200 Technical Manual page 157

4.2 Design and sizing information for connection on the flue gas side
Max. total length of the flue pipe (system size 80 and 100)
Vitodens 200
Rated output range
Max. length system size 80
Vitodens 300
Rated output range
Max. length system size 80
Max. length system size 100
Vitodens 333
Rated output range
Max. length system size 80
Allowed for: 2 x 87º bends
(incl. support bends)
or 3 x 45º bends,
and 0.5 m length of union D.
VITODENS
kW
m
kW 4.2 13.0
m
m
kW
m
For a different number of elbows, deduct
from or add to the given max. length 1 m
for 87º elbows or 0.5 m for 45º elbows.
For a different length of union D, deduct
or add the difference.
8.8 20.0
20
6.6 26.0 8.7 35.0 12.2 49.0
20 10
4.2 13.0
20
Example:
Vitodens 300, 6.6 kW 26.0 kW, with 3 x 87º
bends and 1 m length of the union D:
Deduct 1 m for the bend and 0.5 m for the
union from the max. flue pipe length of
15 m.
Consequently, the max. length would be
13.5 m.
8.8 26.0
20
16.6 66.0
25 15
6.6 26.0
20
4
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