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INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
1.23 DUCTING OF FLUES OR TECHNICAL SLOTS
Ducting is an operation through which, via the introduction of one or more relevant pipes, one achieves a system 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, ue or technical
slot (also in new buildings) (Fig. 41).
Ducting requires 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 regulations in force.
Immergas ducting systems
e Ø 60 rigid, Ø 50 and Ø 80 exible and Ø80 rigid "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.
e instructions in the project or technical report must likewise be followed, in cases provided for by the standard and current technical
regulations.
To guarantee reliability and operation over time of the ducting system, make sure:
- 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 stand-
ard range of daily variation, etc.).
- Installation and maintenance must be performed according to the indications supplied by the manufacturer included with the “green
range” ducting system chosen and in compliance with the regulations in force.
- e maximum length specied by the manufacturer must be respected; in this regard:
• e max. possible length of the Ø 60 exible ducting vertical section is equal to 20 m. is length is obtained considering the com-
plete of Ø 80, 1 exhaust terminal, 1m of Ø 90 pipe in exhaust, two 80° Ø 80 bends at appliance outlet.
• e max. possible length of the Ø 80 exible ducting vertical section is equal to 20 m. is length is obtained considering the Ø 80, 1
complete exhaust terminal, 1m of Ø 90 pipe in exhaust, two 80° Ø 80 bends at appliance outlet for connecting to the ducting system
and two direction changes of the exible hose inside the chimney/technical slot.
• e max. possible length of the Ø 80 rigid ducting vertical section is equal to 30 m. is length is obtained considering the complete
terminal of Ø 80, 1 m of Ø 80 pipe in exhaust, two 90° Ø 80 bends at appliance outlet.
• e maximum length of the Ø 50 exible ducted vertical section is 13 metres straight. is length is obtained by considering the
complete Ø 80 inlet terminal, 1 m of Ø 80 outlet pipe, two Ø 80 90° bends at the outlet of the unit and the reduced Ø 80/50 T-union.
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