46
3062347_0309
Vertical balanced flue system LAF CGG-2(K)
The following applies to gas fired combi boilers
with a balanced flue above the roof, where only
the roof structure lies above the ceiling:
If fire resistance is required for the ceiling, the
pipes for combustion air supply and flue gas
exhaustion running between the top edge of
the ceiling and the roof skin must be run inside
a liner, that provides the same fire resistance
and is constructed from non-combustible
materials. There is a risk of fires spreading, if
these requirements are ignored.
If fire resistance is not required for the ceiling,
route the lines for the combustion air supply
and the flue gas from the top edge of the
ceiling to the roof skin inside a duct made from
non-combustible, rigid materials or inside a
protective metal pipe (mechanical protection).
There is a risk of fires spreading, if these
requirements are ignored.
If the balanced flue crosses different floors,
route the pipes outside the boiler room inside
a duct with a fire resistance of at least 90 min.,
and in living spaces of low height with a
resistance of at least 30 min. Plastic flues
are not permissible. Fire may spread if these
instructions are not observed.
The rated boiler output must be reduced to below
11 kW, if the gas fired combi boiler is installed on
an external wall (balanced flue via an external
wall).
A clearance between the balanced flue and combustible
materials or components is not required, as temperatures
are limited to 85 °C at the rated boiler output.
Balanced flues without ducts must not be
routed through other rooms, otherwise there
is a risk of transferring fire, and a mechanical
protection is not ensured.
Vertical balanced flue system (LAF) horizontal CGG-2(K)
through an external wall
If a condensate trap is installed horizontally or
vertically in the balanced flue, the tightness of the
plugs needs to be regularly checked to guard against
flue gas escaping. If the plug is not working properly
the boiler must not be operated, as flue gas may
escape, causing a danger of poisoning.
7
2
5
2b
12
11
17
12
1
1
17
4
9
9
125-170 mm
Engineering information – balanced flue system
3b
If the balanced flue routing is longer than
2.5 m and the heating demands are very low,
a condensate trap is recommended, to avoid
moisture damage to the gas boiler (see Wolf
accessories).
3b
11
5
125-170 mm
Note
Note
Summary of Contents for CGG-2-18
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