Wolf COB Technical Manual And Installation Instructions page 59

Air/flue gas routing
Condensing boiler versions
Flue in a duct and combustion air directly via the appliance
B23
(open flue)
B33 Flue in duct with horizontal, concentric supply line (open flue)
Connection to a moisture-resistant chimney with
B 33
horizontal concentric connection pipe (open flue)
Vertical concentric roof outlet through a pitched or flat roof,
C33x vertical concentric balanced flue for installation in a duct,
(balanced flue)
Connection to a moisture-resistant balanced flue chimney,
C43x maximum pipe length from centre of boiler bend to connection
3 m (room sealed)
Connection to the flue in a shaft and supply air pipe through an
C53
external wall (balanced flue, supply air pipe 4 m, 1x bend 87°)
Connection to a flue on an external wall
C53x
(room sealed/balanced flue)
Connection to the flue in a shaft and supply air through an
C53x
external wall (balanced flue, supply air pipe 4 m, 1x bend 87°)
Concentric connection to moisture-resistant flue gas chimney and
C83x
combustion air through external wall (room sealed)
Vertical flue for installation in a shaft, with minimum dimensions
C93x rigid or flexible with horizontal concentric connection pipe
DN 60/110, vertical DN 60
Vertical flue for installation in a shaft, with minimum dimensions
C93x rigid or flexible with horizontal concentric connection pipe
DN 80/125, vertical DN 80 or DN 83
Vertical flue for installation in a shaft, with minimum dimensions
C93x rigid or flexible with horizontal concentric connection pipe
DN 110/160, vertical DN 110
Available fan draught: COB-15: 32-65 Pa / COB-20: 45-65 Pa / COB-29: 55-105 Pa / COB-40: 70-150 Pa
1)
(The maximum length corresponds to the total length from the appliance to the flue terminal)
T he calculation was made taking the pressure conditions into account (geodetic height: 325 m). The specified lengths refer
Note
to concentric balanced flues and standard flues, and apply to original WOLF components only.
Where necessary, adapt the installation examples to the relevant building regulations and requirements in your country/region. Discuss any
questions relating to the installation, particularly regarding the inspection components and ventilation apertures, prior to installation with your
local flue gas inspector.
Calculating the balanced flue length
The calculated length of the balanced flue or standard
flue is derived from the straight pipe length and the length
equivalent of any pipe bends.
Example:
Length of straight balanced flue 5.5 m
87° support bend = 2.0 m
2 x 45° bends = 2 x 1.2 m
L = 5.5 m + 1 x 2.0 m + 2 x 1.2 m
L = 9.9 m
3062547_201802
36 Technical information
Maximum length
COB-15 COB-20 COB-29 COB-40
20
DN 60
30
DN 80
-
DN 110
18
DN 60
30
DN 80
-
DN 110
Calculation to EN 13384
(balanced flue manufacturer)
9
DN60/110
24
DN 80/125
-
DN110/160
Calculation to EN 13384
(balanced flue manufacturer)
30
DN 80/125
-
DN110/160
30
DN 80/125
-
DN110/160
30
DN 80/125
-
DN110/160
Calculation to EN 13384
(balanced flue manufacturer)
13
Rigid DN 60
9
Flexible DN 60
29
Rigid DN 80
27
Flexible DN 83
-
Rigid DN 110
Flexible
-
DN 110
Bend Type
30° Single wall
45° Single wall
87° Single wall
30° Concentric
45° Concentric
87° Concentric
1)
- - -
30 30 -
- - 30
- - -
30 30 -
- 30
- - -
22 18 -
- - 14
30 30 -
- - 30
30 30 -
- - 30
30 30 -
- - 30
- - -
- - -
24 21 -
21 17 -
- - 22
- - 22
Calculated length [m]
0,4
0,6
1,0
0,7
1,2
2,0
59