MCZ Forma Wood 75 Dx - Manual (Page 8)

6
2-INSTALLATION INSTRUCTIONS
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