Kratki LUCY 12 Mode D'emploi Et Garantie page 16

• the durability of the enclosure of the exhaust smoke ducts should correspond to a fire-proofness of
at least 60 minutes;
• only after the smoke duct has been evaluated as being appropriate by a chimney sweep may the
fireplace insert be installed;
4.2. installation of the fireplace insert; The fireplace insert should be installed in compliance with the
construction law regulations, fire protection regulations, and above all general regulations:
• Before choosing the location for the fire place insert, it is necessary to analyse all aspects with regard
to construction principles and fire protection;
• Check the mechanical strength of the base on which the fireplace insert is going to be located, tak-
ing into account the total weight of the fireplace insert and its enclosure;
• The fireplace insert must be installed on a non-flammable base of a thickness of at least 300 mm,
the floor near the fireplace being protected by a strip of a non-flammable material at least 300 mm
wide;
• The smoke duct should meet at least the basic criteria, namely:
- must be made of a material of a poor heat conductivity;
- in the case of a fireplace insert with a stack 200 mm in diameter, its minimum cross-section must be
at least 4 dm ;
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- an exhaust duct of up to 5 m in height may not have more than two 45° slopes and of more than
5 m in height not more than two 20° slopes;
• Chimney draught:
- minimum draught - 6 ± 1pa;
- average recommended draught - 12 ± 2pa;
- maximum draught - 15 ± 2pa;
• Non-flammable and insulating materials should be used to construct the enclosure and the instal-
lation structure for the fireplace insert, including mineral wool with an aluminium coating, ceramic
fibres, heat-resisting plates reinforced with glass fibre, and aluminium coatings;
• The principles of proper air circulation and balance must be observed in the room where the firepla-
ce insert is going to be installed:
- distance of the insulation from the walls of the insert 8 –12 cm,
- in rooms with a mechanical ventilation system or very tight window frames, air should be indi-
vidually supplied to the combustion chamber of the insert, for example by means of an inlet, as
recommended by the manufacturer,
- if a system to distribute air to other rooms is going to be used, it should be ensured that air, after
cooling off, can return to the room where the insert will be located in order for it to circulate freely.
in case of the failure to observe this principle, the natural operating cycle of the insert may be
disrupted, which may inhibit the process of hot air distribution.
The room where the fireplace is installed should be of a cubic capacity of not less than 30 m
as being supplied with an appropriate amount of air for the firebox of the fireplace. it is posited that
the fireplace with the combustion chamber closed consumes approximately 8 m
of wood. This is why it is crucial to supply fresh air for combustion purposes, or even more so from the
outside by means of an inlet. such a system will provide cold air for the burning process. Moreover,
the intake ventilating system should be equipped with a damper so that the room will not lose
heat when the fireplace is not used. There are two ways of distributing hot air to rooms: by way of
gravitational or forced circulation.
Gravitational system of hot air distribution
in order to heat a space not larger than the room in which the fireplace is located and the neighbour-
ing rooms, the gravitational system should be selected. Hot air will move upwards to the chamber in
the heating ducts due to the so-called thermal buoyancy. in the case of this system, it is necessary to
remember to install well-insulated and relatively short (up to 3 meters) distributing ducts.
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, as well
3
of air to burn 1 kg
3