Instructions for installation and use. Reproduction prohibited. 07/ 2010 version 2.0 TAM
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5) Installation and insulation of the wooden
beam and construction of the hood
5.1 – Wooden beam
All our beams are delivered with a few extra centimetres to allow for
their recessing in the surround wall.
Wood is a noble, living material, and consequently cracks may appear
in it.
When installing the decorative wooden beam, it is essential to treat it
in order to prevent too rapid desiccation in warm surroundings.
It is important to protect the beam, either with an
incombustible or minimum A2-s1, d0 insulating material, or
by a baffle or pediment.
5.2 – Construction of the hood
5.2.1 General points
The hood is constructed in the set-up area. The obligatorily
decompressed hood must be constructed of incombustible or A2-s1,
d0 insulating materials. The presence of combustible materials inside
the hood is prohibited.
In addition, in order to avoid any major overheating that might lead to
problems, a static ventilation system for the hood must be contrived,
using grilles or any other efficient means of air circulation.
The inside of the hood must be visible to enable checking of the
connecting duct or the insulating material that might surround it.
5.2.2 Special precautions
Before constructing the hood, the following precautions must be taken:
- Check whether the sealing of the pediment, the beam or the metal
casement can support the hood.
- Check again that the appliance’s moveable parts – raising and opening of
door and shutter, for example – are working properly.
- Also check that the fresh air and convection air inlets in the lower part are
well dimensioned.
- Check the positioning of the hood shutter (optional depending on model).
5.2.3 Upper and lower ventilation
5.2.3.1 Lower ventilation
Cross-sections for convection air inlets are defined in the product’s technical card.
5.2.3.2 Higher ventilation
Cross-sections for convection air outlets are defined in the product’s technical
card.
If a warm air output grille is used, its upper part must be located as high up as
possible, but at least 30 cm from the ceiling surface (or the room’s false ceiling).
5.2.4 Hood false ceiling
A false ceiling for the hood must be constructed 30 cm from the ceiling.
- It must be thermally insulated in the same way as the hood ceiling.
- It must be ventilated by any sufficiently efficient system.
NOTE 1: two openings with minimum free cross-sections of 20 cm2 will meet this
requirement.
