MCZ Stub - Manual (Page 10)

8
2-INSTALLATION INSTRUCTIONS
OUTDOOR AIR INLET
Drill a hole on the outer wall close to the product with a minimum section of 100 cm² (13 cm in diameter or 12x12 cm if square, considering
the protective grids), protected by a grid on the outside.
The air inlet must also:
• be protected with grilles, metal mesh, etc. without reducing the net section;
• be positioned in such a way so as not to be obstructed;
• allow maintenance to be performed;
• be directly interconnected with the room where the product is installed;
• in the case of ducting, up to 3.5 linear metres, increase the cross-section by about 5%, whereas for longer ducts, increase it by 15%.
Remember that the ventilation grilles always show the useful section in cm 2 on one side.
When choosing the grille and size of the hole, check that the useful section of the grille is larger or equal to the
section required by the manufacturer for product operation.
IMPORTANT!
The air flow can also be drawn from an adjacent room to that of the room where the product is installed, provided
the air can flow freely through permanent openings interconnected with the outside; it is forbidden to connect to
thermal units, garages, kitchens or bathrooms.
CONNECTION TO THE CHIMNEY
The connection to the closed fireplace is very important and must be implemented carefully. The products have an upper or rear smoke
exhaust. The smoke exhaust pipe must be assembled in such a way so as to guarantee its tightness during product operation in negative
pressure and prevent condensation from being formed and conveyed towards the product.
Any manual draught control devices inserted in the pipe should not hermetically seal the internal section of the duct. These dampers
must be equipped with a suitable mechanism to prevent the valve from rotating completely in the closed position. The minimum safety
opening surface must be 3% of the through section and not less than 20 cm². If the smoke duct has a horizontal section, the same should
rise with a minimum slope gradient of 3-5% (3-5 cm per every metre).
The horizontal section of the smoke duct must not be longer than 2 m.
It is forbidden to use flexible and fibre cement pipes. The smoke duct must not cross rooms in which it is forbidden to
install combustion appliances. It is forbidden to use counter-sloping pipes.
EXAMPLE OF CONNECTION TO THE CHIMNEY