16
C
53
1-26
1-25
X
C
93
INS
TALLER
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MAINTEN
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CE TECHNI
CI
AN
1.16 DUCTING OF FLUES OR
TECHNICAL SLOTS.
Ducting is an operation through which by the
introduction of one or more relevant pipes,
a system is realised for the evacuation of the
combustion products of a gas appliance made
up from the coupling of an existing or new
ducting pipe with a chimney, flue or technical
slot (also in new buildings) (Fig. 1-26). 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.
Immergas ducting system.
The Ø60 rigid and
Ø80 flexible “Green Range” ducting systems must
only be used for domestic use 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 current
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 combustion
products, 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 must be
performed according to the indications
supplied by the manufacturer and in
compliance with the provisions in force.
- The max. possible length of the Ø60 flexible
ducting vertical section is equal to 22 m. This
length is obtained considering the complete
Ø80 exhaust terminal, 1m of Ø80 pipe in
exhaust, two 90° Ø80 bends at boiler outlet.
- The max. possible length of the Ø80 flexible
ducting vertical section is equal to 30 m.
This length is obtained considering the
complete exhaust terminal, 1m of Ø80 pipe
in exhaust, two 90° Ø80 bends at boiler outlet
for connecting to the ducting system and two
direction changes of the flexible tube inside the
flue/technical slot.
- The max. possible length of the Ø60 flexible
ducting vertical section is equal to 30 m. This
length is obtained considering the complete
Ø80 exhaust terminal, 1m of Ø80 pipe in
exhaust, two 90° Ø80 bends at boiler outlet.
1.17 CONFIGURATION TYPE B
OPEN CHAMBER AND FORCED
DRAUGHT FOR INSIDE.
The appliance can be installed inside buildings in
B
23
or B
53
mode; in this eventuality, all technical
rules and national and local regulations in force,
must be complied with.
- Type B open chamber boilers must not be
installed in places where commercial, artisan
or industrial activities take place, which use
products that may develop volatile vapours
or substances (e.g. acid vapours, glues, paints,
solvents, combustibles, etc.), as well as dusts
(e.g. dust deriving from the working of
wood, coal fines, cement, etc.), which may be
damaging for the components of the appliance
and jeopardise functioning.
- In type B
23
and B
53
configuration, the boilers
must not be installed in bedrooms, bathrooms
or in bedsitters.
- The installation of appliances in B
23
and
B
53
configuration is only recommended
outdoors (in a partially protected place) or
in places that are not lived in and which are
permanently ventilated.
The suitable kit referred to in paragraph 1.11
must be used for installation.
1.18 FLUE EXHAUST TO FLUE/CHIMNEY.
Flue exhaust does not necessarily have to be
connected to a branched type traditional flue.
The flue exhaust, for boiler clots installed in C
configuration, can be connected to a special
LAS type multiple flue. For B configurations,
exhaust is only allowed into individual flue
or directly into the external atmosphere via a
relevant terminal. The multiple flues and the
combined flues must also only be connected to
type C appliances of the same type (condensing),
having nominal heat inputs that do not differ by
more than 30% less with respect to the maximum
that can be attached and powered by the same
fuel. The thermo-fluid dynamic features (flue
flow rate, % of carbon dioxide, % humidity etc...)
of the appliances attached to the same multiple
flues or combined flues, must not differ by more
than 10% with respect to the average boiler
attached. Multiple and combined flues must be
specially designed according to the calculation
method and requirements of the standards, by
professionally qualified technical staff. Chimney
or flue sections for connection of the exhaust
pipe must comply with requisites of technical
standards in force.
