Installation instructions
1 7
3.5 - FLUECONNECTION
To connect the flue gas exhaust pipe, local and national
standards must be respected (see Standards UNI 7129 and
UNI 10683).
The chimney is of the utmost importance for correct heat stove
operation: it is therefore necessary that the chimney be
waterproof and properly insulated.
Old or new chimneys, built without respecting the specific
requirements, can be recovered by “piping” the chimney itself.
It will be necessary to introduce a metallic pipe inside the
existing chimney and insulate the space between the metallic
pipe and the chimney.
Chimneys made of prefabricated blocks must have perfectly
sealed joints to avoid that flue condensate smudge the walls
due to permeation.
The entrance to the chimney should be at a 45° angle.
At the base of the chimney a flue inspection opening has to be
made.
It is recommended to insulate the pipe connecting to the
chimney to reduce heat loss and noise.
The dimensions of the chimney must guarantee the necessary
draught required to properly operate the heat stove.
An insufficient draught, besides causing smoke leakage,
considerably reduces the heat output. On the contrary, an
excessive draught causes an abnormal heat output increase,
a higher flue gas temperature in the chimney and too much
fuel consumption.
Use only exhaust pipes suitable for the type
of fuel used.
The supplier will have no contractual or extra-
contractual liability for damage caused due
to incorrect installation and use and anyway
failure to comply with the instructions
provided by the manufacturer.
It is prohibited to exhaust STILE 27
combustion products in shared smoke
pipes.
The flue must comply with standards in
force.
The flue gas chimney must be made properly
to favour the normal flow of flue gas from
the combustion chamber towards the
outside in the case of a power outage.
Remember that the elimination of excess heat is managed
optimally by the electronic control unit (modulation,
extinction phase etc.).
The following are the main features of the flue gas exhaust
pipe according to that established by standards UNI 7129
and UNI 10683:
-
The flue gas exhaust must be equipped with inspection
plugs;
-
The minimum height of the pipe connected directly to the
flue gas exhaust of STILE 27 is between 2÷3 m;
-
If a horizontal section is inevitable, it is recommended that
it be no longer than 1.5 m at most and sloping 3÷5% to
favour the escape of the flue gas;
-
Use of a weatherproof terminal
to avoid altering the
slight state of overpressure found in the flue (do not fit a
horizontal section at the end of the pipe);
-
The exhaust ducts must be made with material resistant to
combustion products and condensation (the inspection
plug can drain any condensation which may be formed);
-
Pipes must be built in such a way to guarantee maximum
smoke tightness (UNI 10683);
-
It is recommended to insulate the exhaust pipe, especially
the outside part exposed to foul weather.
Do not make sections fully horizontal.
There must be no flue gas exhaust hoods installed or
already existing in the room where the heat generator is
installed to avoid creating a vacuum in the environment.
It is prohibited to close the air vents.
It is forbidden to exhaust flue gas through the wall.
Have the flue cleaned at least once a year; we therefore
recommend having both the chimney and the flue gas
fitting thoroughly cleaned.
Should the flue or piping catch fire,
immediately switch STILE 27 off and
disconnect it from the household electrical
mains.
fig. 6
Weatherproof
terminal
1.5 metres
2-3 metres min
H > 4 metres
Soot container
with
condensation
drain
