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2.4 CONNECTION TO THE FLUE
It is good to remember at all times that it is at least as important that the flue works
correctly and is used safely as that the stove does.
Ensure that the flue draught is between 0.10 mbar and 0.15 mbar, if it should be
lower, check that it complies with current rules (UNI EN 1443 and UNI EN 10683).
It is vital that these standards are complied with for modern high-performance
appliances to operate correctly as they discharge smoke into the flue at a substantially
lower temperature than old low-performance appliances.
For this reason, we recommend that the stove is installed by a qualified
person in accordance with current standards and regulations.
!BEWARE!: any excess draught (constantly above 0.20 mbar for a period of time)
will cause damage due to excessive wear to the whole body of the stove and the baffle
plate, as well as poor heat efficiency.
The stove is connected to the flue by flue pipes of Ø 120 mm (Desirée 760 version)
and Ø 130 mm (Desirée 860 version). These pipes are available on the market and are
connected with the collar provided.
The stove comes with the flue outlet at the top. The collar is in the ash pan drawer
and must be assembled and fixed with the M5 screws on the hob.
To use the rear flue outlet follow the following instructions:
- remove the cut-out on the back of the stove corresponding to the blanking plate,
working on alternative sides of it until it comes out;
- remove the rear flue outlet blanking plate by loosening the screws;
- remove the collar from the top flue outlet position, loosening the screws, and
position it where the rear flue outlet blanking plate was;
- tighten the collar using the screws taking care to position the sealing ring
carefully;
- then fasten the blanking plate in the top flue outlet position tightening the screws
fully.
When using the top flue outlet, to obtain the best draught, the first vertical
length of flue from the stove must be at least 1 metre long. Furthermore, it is
important that the stove - flue connection is made with a maximum horizontal
length of 1 metre. Should the horizontal lengths be longer than a metre, there
must be a slope of at least 10 cm for every metre of pipe.
When using the rear flue outlet, it is preferable that the flue inlet should be in
line with the stove’s flue outlet, thereby avoiding any bends in the piping that
would reduce the draught of the stove and slow down the discharge of the smoke,
thus causing the stove not to work well. Check that the pipes are properly sealed
so that no smoke can escape and check that the length of tube entering the flue
does not obstruct the passage of the smoke. In any case, it is better to place the
stove near the flue to avoid long lengths of pipe that would reduce the flue
draught.
To check the flue draught, consult the following TAB. 2.