Wolf CGB-35, Руководство по установке, Страница: 41 / 60

41 3061490_0709
Design information
If the balanced flue pipe 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 accommo -
dation of low height with a resistance of
at least 30 min. Fire may be transferred if
these instructions are not observed.
With low outside temperatures the water
vapour contained in the flue gas may con -
dense on the balanced flue pipe and freeze.
These icicles may fall from the roof causing
injuries or material losses. Prevent ice from
falling through on-site measures, e.g. the
installation of a snow catcher grille.
Secure the balanced flue pipe or outer flue
pipe ducts with spacer pipe brackets at a
maximum distance of 50 cm from the flue
outlet or upstream/downstream of devi -
ations to achieve protection against the
pipe joints being pulled apart. Flue gas may
escape, if this rule is not observed.
Risk of poisoning through escaping flue
gas. The equipment may also suffer da -
mage.
If no specific fire resistance is required for
the ceiling, route the combustion air supply
and flue gas pipes between the top edge of
the ceiling and the roof skin inside a duct
made from non-flammable, rigid material or
inside a protective metal pipe (mechanical
protection). There is a risk of fires sprea -
ding if these requirements are ignored.
Gas fired condensing boilers with a balan -
ced flue outlet above the roof may only be
installed in attics or in rooms, where the
ceiling also forms the roof or where only
the roof construction is located above the
ceiling.
General notes
Particularly for safety reasons, use only original Wolf
components for concentric air/flue pipes (balanced
flue systems).
Where necessary adapt the installation examples to the
relevant Building Regulations and requirements in your
country/region. Discuss any questions relating to the
installation of inspection covers and ventilation apertures
with your local heating engineer.
A specific clearance between the concentric balan -
ced flue and combustible materials or components
is not required, as temperatures are limited to 85 °C
at the rated boiler output.
If only a flue pipe is installed, maintain the clearan -
ces in accordance with current installation regula -
tions.
The following applies to gas fired boilers with a
balanced flue above the roof, where only the roof
structure lies above the ceiling:
If a specific fire resistance is required for
the ceiling, the combustion air supply and
flue pipes running between the top edge of
the ceiling and the roof skin must be run
inside a liner, which also offers this fire re -
sistance and is made from non-flammable
materials. There is a risk of fires spreading
if these requirements are ignored.
NB
Balanced flues without ducts must not
be routed through other rooms, otherwi -
se there is a risk of fires spreading, and
mechanical protection is not ensured.
Combustion air must not be introdu -
ced from chimneys, which previously
carried flue gases from oil or solid fuel
boilers.