Ravelli o-ring, User Manual

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rooms (only watertight installation) or studios (unless installed in a hermetically
sealed combustion chamber).
EXCERPT OF STANDARD UNI/EN 1443
System compatibility check
Compatibility check of the system should be carried out before any installation
or commissioning intervention. The adjacent, side and rear walls and the sup-
porting surface must be made of non-combustible and non sensitive to heat
material. The stove can be installed next to flammable materials or materials
sensitive to heat as long as the required safety conditions are met by interpos-
ing an insulating and non-flammable material; this operation is provided in the
instructions supplied by the manufacturer.
When the installation instructions are not available, the installer will have to se-
cure the appliance and shall be liable for its commissioning. Before installation
you should check the position of the stove, flue or exhaust terminal devices to
make sure the following are complied with:
•
Installation restrictions.
•
Legal distances.
•
Limitations provided by local administrative regulations or specific provisions
of the local bodies.
•
Conventional limitations imposed by the residence regulations, easement or
contracts.
After surveying the installation place, the installer should check the following:
• the type of appliance;
• the compatitbility of the installation place with the appliance in terms of mini-
mum installation volume indicated by the the instructions of the manufacturer
of the heat generator regarding the requirements of the fume exhaust system
for the deactivation of the heat generator;
• the internal cross section of the fume duct, the composing materials, the
evenness of the cross section, the absence of obstructions;
• height and length on vertical plane of the chimney;
• the existence and compliance of chimney terminal;
• the possibility to fit external air vents and the dimensions of existing vents.
The complete flue exhaust system must be supplied and installed in compli-
ance with the regulations issued by the standardization bodies and should be
installed according to state-of-the-art standards.
air vent
It is used to fuel the fire box and input air into the room; it should be fitted di-
rectly from the outside (not through other rooms, garage etc.; its cross section
should be equal or 1/4 higher than chimney section by minimum 80 sq.cm for
stoves and thermo-stoves (UNI1475) and 100 sq. cm for boilers (UNI303-5).
Manufacturer’s and designer’s instructions should be however complied with
at all times. Also check that the drilling position of the wall allows the intake
of fresh air, making sure that no harmful exhausts fumes return into the room
(radon gas, ect.).
fume duct and fittings
For heat generating devices equipped with an electric fume exhaust fan you
must follow the installation instructions of the manufacturer regarding the maxi-
mum length and number of bends of the exhaust ducts. In case the maximum
values are not available , you should follow the provisions below:
•
Horizontal sections should have a minimum slope of 3% upwards (45° bends
are recommended).
•
The length of the horizontal section should be minimum and its plan projection
should not exceed 3 metres.
• The number of direction changes including the one required to use the T fitting
and insert the chimney should not be higher than 3.
• This section should have constant diameter and equal at fire box outlet up to
the fitting into the flue.
• It is forbidden to use flexible metal and cement fibre tubes and pressurization
should be ensured at all times .
In any case, the fume ducts should be sealed and protected against combustion
products or condenstae as well as insulated if passing outside the installation
room. It is not allowed to mount manually regulated draught devices onto appli-
ances with forced draught.
flue
• It should be made of suitable materials to ensure resistance to normal me-
chanical and chemical stress, and should be properly insulated to prevent
condensate; therefore, it should be provided with thermal insulation (prod-
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