Immergas VICTRIX 24 kW Manual De Instrucciones Y Advertencias página 192

Internal installation in B
The appliance can be installed inside buildings in B
ES
case, make sure to respect all the technical standards and current national
and local regulations (see page 185).
PL 1.7 Existing flue ducting.
Ducting is an operation through which, within the context of restructuring a
system and with the introduction of one or more special ducts, a new system
is executed for evacuating the fumes of a gas appliance, starting from an
TR
existing flue (or a chimney) or a technical hole. Ducting requires the use of
ducts declared to be suitable for the purpose by the manufacturer, following
the installation and user instructions, provided by the manufacturer, and
the requirements of the standards.
CZ
C83
SI
HU
RU
IE
SK
Immergas ducting system. "Green Range" Ø 60 mm rigid and Ø80 flex-
ible ducting systems can only be used for domestic purposes and with Immergas
condensing boilers.
In any case, ducting operations must respect the provisions contained in the
standard and in current technical regulations; in particular, the declaration
of conformity must be compiled at the end of work and on commissioning
of the ducted system. The instructions in the project or technical report
must likewise be followed, in cases provided for by the standard and cur-
rent technical regulations. The system or components of the system have a
technical life complying with current standards, provided that:
- it is used in average atmospheric and environmental conditions, according
to current regulations (absence of fumes, dusts or gases that can alter the
normal thermophysical or chemical conditions; existence of temperatures
coming within the standard range of daily variation, etc.).
- Installation and maintenance are performed according to the manufac-
turer's instructions and the provisions of current regulations.
- The max. possible length of the Ø 60 rigid ducting vertical section is 22
m. This length is obtained considering the complete Ø 80 intake terminal,
1m of Ø 80 pipe in exhaust, two 90° Ø 80 bends at boiler outlet.
190
configuration.
23
configuration; in this
23
- The max. possible length of the Ø 80 flexible ducting vertical section
is equal to 30 m. This length is obtained considering the complete Ø
80 intake terminal, 1m of Ø 80 pipe in exhaust, two 90° Ø 80 bends
at boiler outlet for connecting to the ducting system and two direction
changes of the flexible tube inside the flue/technical hole.
1.8 Fume exhaust to flue/chimney.
Flue exhaust does not necessarily have to be connected a branched type traditional
flue. Flue exhaust can be connected to a special LAS type multiple flue.
Multiple flues and combined flues must also only be connected to type C
appliances and of the same category (condensing), having rated heat outputs
not differing by less than 30% with respect to the max. connectable and fed
by the same type of fuel. The thermofluidodynamic characteristics (flowrate
in mass of fumes, % of CO2, % humidity, etc.) of the appliances connected
to the same multiple or combined flues must not differ by more than 10%
with respect to the average boiler connected. Multiple and combine flues
must be specially designed according to the calculation method and require-
ments of the standards, by professionally qualified technical personnel.
Chimney or flue sections for connection of the exhaust pipe must comply
with requirements of the standards.
1.9 Chimneys/flues.
General notes. A chimney/flue used to exhaust combustion products must
be designed as follows:
- in case of wet operation, be made of materials suitable for discharging the
condensate in compliance with the provisions of current standards and
regulations;
- ducting must ensure sealing of combustion products, be waterproof and
insulated;
- be made from fireproof materials ensuring lasting resistance to normal
mechanical stress, heat and the action of fumes and their possible con-
densate;
- ducting must be routed vertically without reductions/throttles;
- be adequately separated, by means of a suitable air space or insulation,
from zones with combustible and/or easily flammable materials;
- be suitably designed to prevent the possible freezing of condensate in-
side the fume system and condensate discharge system (trap, passivator
tank);
- comply with the current relevant national and local regulations, for
discharge of the condensate produced by the fume exhaust system;
- have a solid materials and possible condensate collection unit below the open-
ing of the first flue at a height of at least 500mm, fitted with an airtight
metal door;
- have have a round, square or rectangular internal section (in the latter
two cases, with rounded angles and radius of not less than 20 mm).
Hydraulically equivalent sections are also admitted;
- have a chimney-top in compliance with the specifications given below;
- without mechanical suction devices installed at the top of the duct;
- in flues routed inside or against inhabited buildings, there must be no
risk of pressure surges.
Chimney-tops. Chimney-tops are the devices generally installed on top of
single or multiple flues. These devices are installed to facilitate dispersion
of combustion products also in adverse weather conditions and prevent
deposit of foreign matter. They must:
- have a useful output section no less than double that of the flue/chim-
ney;
- be suitably designed to prevent penetration of rain or snow in the flue/
chimney;
- be shaped in such as way that prevents the formation of frost and ice at
the free outlet sections;
- be designed to ensure constant exhaust of combustion products with any
direction or angle of wind.
The outlet height, corresponding to the top of the flue/chimney, regardless
of eventual chimney-tops, must be outside the "backflow zone", to avoid
the risk of counterpressures preventing the free discharge of fumes into the
atmosphere. Therefore always respect the minimum heights given in the
figures for standards, according to the pitch.