Wolf FGB-K Series Installation And Maintenance Instructions For Contractors page 80

Connection to balanced flue
Calculating the balanced flue length
Minimum shaft size for room sealed operation C93x
FGB-28
17
Connection DN 80/125
15
13
11
9
7
5
90 95 100 105
Shaft cross-section in [mm]
FGB-35
24
22
Connection DN 80/125
20
18
16
14
12
10
8
6
4
90 100 110
Shaft cross-section in [mm]
80
31. Technical information, balanced flue
Ensure that the flues can be inspected regarding their free cross-section. For this,
provide an appropriate inspection aperture in the installation room, in consultation with
your local flue gas inspector.
Connections on the flue gas side are made using female connections with gaskets.
Always position female connections against the direction of the condensate flow. Install
the balanced flue with a slope of at least 3° towards the gas condensing boiler.
Use spacer brackets to secure the sections in place (see installation examples).
The calculated length of the balanced flue or standard flue is comprised of the straight
pipe length and the length of the pipe bends.
Example for a 60/100 system
Straight balanced flue pipe. length 1.5 m
1 x 87° bend ≙ 1.5 m
2 x 45° bends ≙ 2 x 1.3 m
Note:
Length equivalence of the system:
1)
Assumption: the installation room contains
2x inspection bends, 1x 87° bend and 1.5 m
horizontal with 87° support bend
FGB-28 am Schachtquerschnitt eckig bei C93x in DN 80
Connection DN 60/100
110 115 120 125 130 135
Schachtquerschnitt in [mm]
FGB-35 am Schachtquerschnitt eckig bei C93x in DN 80
Connection DN 60/100
120 130 140
Schachtquerschnitt in [mm]
:
1)
To avoid reciprocal interference between balanced flues routed above the
roof, we recommend maintaining a minimum clearance of 2.5 m between
balanced flues.
17
Connection DN 80/125
15
13
Anschluss DN 80/125
Anschluss DN 60/100
11
9
7
5
140
100 110
Shaft cross-section in [mm]
22
20
Connection DN 80/125
18
16
14
Anschluss DN 80/125
Anschluss DN 60/100
12
10
8
6
4
105 110
150
L = straight length + bend length
L = 1.5 m + 1 x 1.5 m + 2 x 1.3 m
L = 5.6 m
60/100
87° bend 1.5 m
45° bend 1.3 m
FGB-28 am Schachtquerschnitt rund bei C93x in DN 80
Connection DN 60/100
120 130 140
Schachtquerschnitt in [mm]
FGB-35 am Schachtquerschnitt rund bei C93x in DN 80
Connection DN 60/100
115 120 125 130 135
Shaft cross-section in [mm]
Schachtquerschnitt in [mm]
80/125
3 m
1.5 m
Anschluss DN 80/125
Anschluss DN 60/100
150 160
Anschluss DN 80/125
Anschluss DN 60/100
140 145 150
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