MCZ Forma Wood 75 Dx - mod.2012 - Manual (Page 27)

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6-INSTALLATION AND ASSEMBLY
Technical Dept. - All rights reserved - Reproduction is prohibited
EXTERNAL AND INTERNAL AIR INLET
COMBUSTION AIR INLET
The FORMA WOOD closed fireplace is predisposed with a rear hole, for the entry of air necessary for combustion. One can move the
combustion air inlet under the product. The following is required to do so:
• Remove the rear flange (fig.5).
• Remove the cap in the part underneath the closed fireplace (fig.6).
• With the two screws, fix the flange under the closed fireplace (to then make connection with pipes)
• Position the cap removed (from under the closed fireplace) in the lower part.
Connect via ø100 flanges and a hose (fig. 5 o 6) to grilles outside or inside the installation room so that the path is separate from the
natural or forced convection air.
NEVER CLOSE THE COMBUSTION AIR INLET HOLE.
NATURAL VENTILATION AIR INLET
If the closed fireplace is installed with natural ventilation, i.e. without an electric fan, you will need a 300 cm2 external combustion air
inlet (net value) at the back of the unit to allow for a constant flow of fresh air underneath the closed fireplace.
This requirement must be strictly followed, otherwise the lack of oxygen may affect both combustion and the heat output of the product.
FORCED VENTILATION AIR INLET
If the closed fireplace is installed with forced ventilation, that is by using a Comfort Air kit, the air inlets and ducting must be conducted
as follows:
• to ensure correct oxygen renewal in the room, we recommend setting up a 150 cm2 external air inlet so that clean, fresh air can be
drawn in and another inlet in the room where the closed fireplace is placed (again a 150 cm2 air inlet).
• This will ensure that the air inside the room where the equipment is installed is mixed properly and will guarantee better cooling for
the closed fireplace’s structure.
• If you cannot carry out this kind of connection, you will still need to set up the two air inlets, whether they are both from the inside or
outside. Depending on the choice, you will have slightly higher or lower operating temperatures compared to average values, though
they will not prevent the product from working properly.
FIGURE 6 - COMBUSTION AIR INLET FROM BENEATH
THE FORMA CLOSED FIREPLACE
FIGURE 5 - REAR COMBUSTION AIR INLET