23
ZEFIRO
3
- ZEN AIRTIGHT
• Mount the fitting on the air diverter for the air to be ducted (see
Fig. 47
).
• Connect the ducting pipe d.80 and block the pipe with the clamp. Attention: use at least 20 cm of flexible pipe above the fitting
since the cover of the insert moves during manoeuvres (see
Fig. 48
).
Fig. 46 - Seal with adhesive aluminium tape
Fig. 47 - Secure the fitting
Fig. 48 - Flexible pipe connection (rear view of
the insert)
Fig. 49 - Example of ducting
• A stove with no ducting has a variable air flow rate from a minimum of 61 m
3
/h to a maximum of 130 m
3
/h, and an air tempe-
rature which varies from a minimum of 90°C to a maximum of 136°C.
• In the case of ducting, it is recommended not to exceed 6 metres of pipe and 3 x 90° bends, otherwise the hot air loses its
effectiveness.
• Use pipes with an 80 mm diameter with smooth internal walls.
• If the pipes pass through cold walls, insulate the pipe with insulating material.
• Place a protective grille with large mesh and a total minimum net surface area of 40 cm
2
over the outlet.
• After the 6 metres of pipe there can be a variable air flow rate from a minimum of 58 m
3
/h to a maximum of 83 m
3
/h, and an air
temperature which varies from a minimum of 65°C to a maximum of 99°C. (These values have been recorded in the laboratory,
there may be differences in both flow rate and temperature in the installation room).
• If you wish to increase the air flow, install a small wall-mounted fan on the outlet with a flow rate of more than 130 m
3
/h, this
should be performed by an authorised technician.
• With factory parameters 1/2 of the heat produced by the stove is conveyed into the room where it is installed, the remaining
1/2 comes out from the ducting on the left.
