21
Using a flue restrictor
Routing type external wall connec-
tion
Type (model) C
12x
Rated heating output Balanced
flue system
Length of bal-
anced flue pipe
Flue restrictor
kW
7 mm
m
Internal 7 mm
18 60/100 ≤ 3 41
> 3 ≤ 5 44
22 60/100 ≤ 1 41
> 1 ≤ 3 43
> 3 ≤ 5 46
24 60/100 ≤ 1 43
> 1 ≤ 5 46
30 60/100 ≤ 1 50
> 1 ≤ 3 –
36 80/125 ≤ 1 –
> 1 ≤ 3 –
Deductions from the max. length of
the balanced flue pipe through the
following components:
■ Balanced flue bend 45°: 0.5 m
■ Balanced flue bend 90°: 1.0 m
■ External wall connection: 1.0 m
Note
■ An inspection piece with a conden-
sate trap should be inserted in the
balanced flue line. Connect the con-
densate trap to the condensate drain.
■ If the balanced flue line is routed
through a metal roof: Fit a seal on the
roof outlet. The balanced flue line
must not come into contact with the
metal roof.
Installation sequence
Mounting the boiler and making the connections
(cont.)
5837146
Installation
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