Viessmann vitodens Technical Manual page 126

Gas fired condensing boiler
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4.2 Design and sizing information for flue pipe connections
Special designs: open flue operation with combustion air supply via connection to the ambient air for Vitodens up to 35 kW
(type B
according to TRGI '86/96)
33
Vitodens may also be installed in
occupied rooms and be operated in open
flue operation, subject to
H the duct union being constructed as
part of the balanced flue system, and
the combustion air being drawn directly
from the room via an aperture at the
chimney inlet (ambient air connection
bezel, see page 142)
C
C
C
C
C
C
C
C
C
C
C
C
C
4
1
1
1
1
1
1
1
1
1
1
1
1
1
8
8
8
8
8
8
8
8
8
8
8
8
8
7
7
7
7
7
7
7
7
7
7
7
7
7
5
5
5
5
5
5
5
5
5
5
5
5
5
A
A
A
A
A
A
A
A
A
A
A
A
A
6
6
6
6
6
6
6
6
6
6
6
6
6
E
E
E
E
E
E
E
E
E
E
E
E
E
A Ventilation air
B Flue gas
C Secondary ventilation
D Apertures for connected rooms (min. 150 cm
E Inspection aperture
126
H sufficient combustion air delivery being
ensured inside the room through an
interconnected combustion air supply
in accordance with the stipulations of
TRGI '86/96, item 5.5:
Minimum volume of interconnected
3
rooms, 4 m
Apertures in connecting doors
min. 150 cm
B
B
B
B
B
B
B
B
B
B
B
B
B
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
4
4
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
2
2
2
2
2
2
2
2
2
2
2
2
2
C
C
C
C
C
C
C
C
C
C
C
C
C
D
D
D
D
D
D
D
D
D
D
D
D
D
2
)
When routings through ducts, the same
conditions apply as for the routing of flue
gas systems through a duct, see
page 122.
Calculation of the max. total flue pipe
length, see page 124.
per kW rated output
2
Rated output
1 Boiler adaptor
(part of the standard boiler delivery)
2 Basic duct set (rigid)
comprising:
H Support bend
H Support rail
H Duct cover
H Spacers (3 pieces, max. clearance 5 m)
Spacers (3 pieces, max. clearance 5 m)
3 Flue pipe
1.95 m long (2 pieces @ 1.95 m = 3.9 m)
2 m long (2 pieces @ 2 m = 4 m)
1.95 m long (1 piece)
2 m long (1 piece)
1 m long (1 piece)
0.5 m long (1 piece)
Flue pipe bend
(for use in corbelled ducts)
30º (2 pieces)
15º (2 pieces)
4 Inspection piece, straight (1 piece)
5 Balanced flue inspection piece, straight
(1 piece)
6 Balanced flue wall bezel for interconnected
air supply
∅ 80/125 mm
(type B
according to TRGI '86/96)
33
7 Balanced flue pipe
1 m long
0.5 m long
8 Balanced flue bend
87º (1 piece)
45º (2 pieces)
or
Balanced flue inspection tee piece
87º (1 piece)
kW
12 26 35
System size
∅ mm
60
80
60
80
60
80
60
80
60
80
60
80
60
80
60
80
60
80
60
80
60
80
60
80
60
80
60
80
VITODENS

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