Viessmann vitodens Technical Manual page 115
Gas fired condensing boiler
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- Operating instructions manual (36 pages)
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Plastic (PPs) balanced flue system for separate ventilation and flue gas routing for Vitodens up to 35 kW
(type C
, according to TRGI '86/96)
53x
Vitodens may be operated with separate
flue gas/ventilation air routing as
balanced flue system subject to the
following flue gas system conditions:
H Connection to a chimney or duct whose
cross-section is too small to provide the
combustion air supply
H Connection to a chimney which is
unsuitable for providing the
combustion air supply because of
deposits
H Connection to a moisture resistant
chimney.
The combustion air is then supplied
through a separate ventilation air pipe,
which is routed separate from the flue
pipe.
max. 4 m
max. 4 m
max. 4 m
max. 4 m
max. 4 m
max. 4 m
max. 4 m
max. 4 m
max. 4 m
max. 4 m
max. 4 m
max. 4 m
7
7
7
7
7
7
7
7
7
7
7
7
6
6
6
6
6
6
6
6
6
6
6
6
1
1
1
1
1
1
1
1
1
1
1
1
5
5
5
5
5
5
5
5
5
5
5
5
3
3
3
3
3
3
3
3
3
3
3
3
A
A
A
A
A
A
A
A
A
A
A
A
10 mm
10 mm
10 mm
10 mm
10 mm
10 mm
10 mm
10 mm
10 mm
10 mm
10 mm
10 mm
A Ventilation air
B Flue gas
C Union
D Duct F 90 or F 30
E Ventilation aperture
F Flue pipe
VITODENS
4.2 Design and sizing information for flue pipe connections
Observe the structural notes according to
TRGI '86/96, item 5.6.
H Vitodens 12 kW:
Int. dia. flue pipe
Int. dia. external pipe
Int. dia. ventilation pipe
H Vitodens 26 to 35 kW:
Int. dia. flue pipe
Int. dia. external pipe
Int. dia. ventilation pipe
Max. pipe length:
H union
H Ventilation pipe
Max. number of bends
(flue pipe and
ventilation air pipe)
H 87º:
or
H 45º:
Install an inspection aperture for checking
and cleaning the flue pipe.
C
C
C
C
C
C
C
C
C
C
C
C
F
F
F
F
F
F
F
F
F
F
F
F
4
4
4
4
4
4
4
4
4
4
4
4
2
2
2
2
2
2
2
2
2
2
2
2
B
B
B
B
B
B
B
B
B
B
B
B
8
8
8
8
8
8
8
8
8
8
8
8
E
E
E
E
E
E
E
E
E
E
E
E
D
D
D
D
D
D
D
D
D
D
D
D
It was verified as part of the CE approval
test that nowhere on Vitodens or the
balanced flue system surface will
temperatures higher than 85 ºC occur.
∅ 60 mm
∅ 100 mm
The flue gas system for separate
∅ 100 mm
ventilation air/flue gas routing has been
tested and CE-designated as a concentric
balanced flue system as one technical
∅ 80 mm
unit with the Vitodens condensing boiler.
∅ 125 mm
A function verification according to
∅ 100 mm
EN 13384 for the ventilation air side and
the unions is not required.
3 m
4 m
2 pieces each
3 pieces each
Rated output
1 Boiler adaptor
(part of the standard boiler delivery)
2 Balanced flue pipe
1 m long
0.5 m long
Balanced flue bend
87º (1 piece)
45º (2 pieces)
3 Balanced flue sliding coupling
4 Balanced flue inspection piece, straight (1 piece)
5 Balanced flue tee C 8
with wall bezels
6 Ventilation pipe ∅ 125 mm
87º (1 piece)
45º (2 pieces)
7 Ventilation air damper
8 Wall bezel
If the flue pipe is routed through an existing chimney or duct
(not moisture resistant), use flue pipe components as on
page 107.
kW
12 28 35
System size
∅ mm
60
80
60
80
4
60
80
60
80
60
80
60
80
60
80
60
80
60
80
115
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