MCZ Forma 75 dx [27/40] Installation and assembly

6-INSTALLATION AND ASSEMBLY

EXTERNAL AND INTERNAL AIR INLET

COMBUSTION AIR INLET

The FORMA WOOD closed replace 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 ange (g.5).

• Remove the cap in the part underneath the closed replace (g.6).

• With the two screws, x the ange under the closed replace (to then make connection with pipes)

• Position the cap removed (from under the closed replace) in the lower part.

Connect via ø100 anges and a hose (g. 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 replace 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 ow of fresh air underneath the closed replace.

This requirement must be strictly followed, otherwise the lack of oxygen may aect both combustion and the heat output of the product.

FORCED VENTILATION AIR INLET

If the closed replace 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 replace 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 replace’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