MCZ Forma Wood 75 Dx - Manual (Page 10)

8
2-INSTALLATION INSTRUCTIONS
EXAMPLES OF CHIMNEYS
AISI 316 steel product with
double chamber insulated
with ceramic fibre or similar
material, resistant to 400°C.
Refractory product with
insulated double chamber and
external lightweight concrete
cladding with cellular material
such as clay.
Traditional square-section clay
product with insulating empty
inserts.
Avoid products with an internal
rectangular section where the
larger side is 1.5 times the
smaller side (such as 20x40 or
15x30).
EXCELLENT GOOD POOR VERY POOR
For square or rectangular-section chimneys, the internal corners must be rounded with a radius of no less than 20 mm. For a rectangular
section, the ratio between internal dimensions must be ≤1.5.
The sections/lengths of the chimneys shown in the technical data table are guidelines for a correct installation. Any alternative
configurations must be suitably sized in accordance with the general method of calculation of UNI EN13384-1.
It is recommended for the flue duct to be equipped with a chamber to collect solid materials beneath the opening of the smoke duct,
which can be easily opened and inspected through an airtight door.
Should doubts arise regarding product performance or if its dimensions are different from those recommended, you
are strongly advised to have an installer, authorised by the manufacturer, perform an inspection and evaluate the
performance of the product.
The manufacturer declines all liability regarding product malfunctioning if this is attributable to a product that is
badly sized and installation does not comply with the stipulated requirements.