Types Of Installation - Ferroli LIRA SLIM PLUS Use, Installation And Maintenance Instructions

LIRA SLIM PLUS
5.5.1.1.

TYPES OF INSTALLATION

The components of the combustion products evacuation system must be chosen in relation to the type of unit to
be installed.
FLUE
Description
Vertical duct having the purpose of collecting and expelling at a suitable height from the ground the
combustion products from a single unit and, where permitted, more than one.
Technical requirements:
▪ be compliant with the applicable product standard (EN 1856, EN 1857 EN 1457, EN 1806, EN 13063..);
▪ be sealed against combustion products, isolated and insulated according to use;
▪ have a predominantly vertical path with deviations from the axis < 45°;
▪ be adequately distanced from flammable materials with an air gap or insulation;
▪ have a preferably round, constant, free and independent internal section;
▪ be equipped with an inspectable chamber for the collection of solid materials and any condensate located
under the fume duct inlet.
In any case, the fume ducts must be sealed against combustion products and any condensation. Therefore, it is
advisable to use pipes with silicone seals or similar devices which resist the unit's operating temperatures (e.g. T200
P1) and which, by removing the seals, are in any case also certified T400 N1 G.
FUME DUCT OR CONNECTION
Description
Duct or connection element between the unit and flue for evacuation of fumes.
Technical requirements:
▪ it must not cross rooms where the installation of combustion units is not allowed;
▪ flexible metal tubes or fibre cement pipes are prohibited;
▪ the use of counter-sloping elements is prohibited;
▪ horizontal sections must have an upward slope of at least 3%;
▪ the length of the horizontal section must be minimal and not more than 4 m;
▪ there must not be more than 3 changes of direction without the T union;
▪ with change of direction > 90° a max. of 2 bends can be used with length in horizontal
projection not exceeding 2 m.
▪ the fume duct must have a continuous section and allow the recovery of soot.
EN
A73023890 - Rev 00 - 06/2023 171