Instructions for installation and use. Reproduction prohibited. 07/ 2010 version 2.0 TAM
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3.6 – Installing the jambs and corbels
The appliance must be placed on a stable, flat incombustible base
(concrete, for example). It is important to check that a space of
between 3 and 5 mm exists between the appliance’s facade and the
dressing, allowing for free expansion as well as providing the space
necessary for air to pass (30 mm minimum) between the surround
insulation and the back of the appliance.
The fireplace jambs, hollow or marble jambs in particular, must be
protected from heat (thermal radiation) by a material with a minimum
thermal resistance of 0.7m
2
.K/W at 50°C (or of 0.4m
2
.K/W at 200°C)
classed as A1 or at least M0 or A2-s1, d0 (equivalent to 30 mm of
fibrous insulator of a density less than 100 kg/m
3
with aluminium foil or
self-supporting high-temperature structural insulators made of calcium
silicate).
3.7 – Insulation of the surround
3.7.1 Incombustible surrounds
The surround must be protected by interposition of a material with a
minimum thermal resistance of 0.7m
2
.K/W at 50°C (or of 0.4m
2
.K/W at
200°C) classed as A1 or at least M0 or A2-s1, d0 (equivalent to 30
mm of fibrous insulator of a density less than 100 kg/m
3
with
aluminium foil or self-supporting high-temperature structural insulators
made of calcium silicate).
It must be ascertained that the insulation does not obstruct
combustion and convection air supplies.
3.7.2 Combustible surrounds
See paragraph 2.3.3.2
4 – Connecting duct
4.1 – General points
Connecting ducts for Cheminées de Chazelles inserts must be metal.
Aluminium-plated steel must not be used. The diameter of the connecting
duct must be at least equal to that of the appliance’s pipe or sleeve.
As regards flexible connecting ducts, only double-skin ducts with smooth
inside walls and classed a minimum of N1 airtightness, may be used for
connecting a Cheminées de Chazelles insert.
The connecting duct must be able to be swept and must be dismantleable.
Expansion of the connecting duct, particularly at junctions, must be ensured
without negatively affecting its airtightness or its mechanical performance.
The connecting duct or the insulator that might surround it must be visible
along the whole of its length, either directly or by means of a hatch or grille
in the hood.
For choice of components, refer to NFDTU 24.2 and DTU 24.1 (section 13)
and to national regulations.
Safety distances between connecting ducts and any combustible material
must be complied with.
4.2 – Variation of cross-section
If the cross-section of the flue or casing, albeit adequate, differs from the
cross-section of the connecting duct, reduction or increase of the cross-
section can only be carried out employing a part shaped to avoid any
sudden variation of cross-section. An angle of variation of cross-section less
than or equal to 45° will meet this requirement.
