WOOD BURNING BOILER COOKER ALTEA 110 SICURO TOP
13
EN - Rev. 1.2
The flue and connection to the same
The
flue
is an essential element for the efficient operation of the appliance. The boiler cooker smoke outlet is 150 mm in
diameter. The flue must have a minimum cross section of 180 mm with a minimum height of 4 metres. Each product
must be equipped with its own flue, without other adjoining elements (boilers, chimneys, stoves, etc.). The flue
dimensions are closely related to its height, which must be measured from the appliance flue gas outlet to the base of
the stack. In order to guarantee adequate draught, the surface of the chimney flue outlet must be double the flue cross-
section. The discharge pipe for combustion products generated by the forced draught device, must comply with the
following requirements:
-
It must seal off the combustion gases, as well as being waterproof and suitably isolated and insulated in relation to
the conditions of use (refer to UNI 9615);
-
It must be made of suitable materials capable of withstanding normal mechanical stress, heat, and the effects of
combustion gases and condensate, if any;
-
It must go upwards after the vertical section, for the entire remaining part, with a minimum gradient of 20%. The sub-
horizontal section must not have a length greater than ¼ of the effective height H of the flue or chimney, and
must
not be longer than 2,000 mm
;
-
It must preferably have a round internal cross-section: square or rectangular cross-sections must have rounded
corners with radius not inferior to 20 mm;
-
It must have a constant, free and independent internal cross section;
-
Rectangular cross-sections must have a maximum ratio of 1.5 between the sides;
-
If the flue is installed externally, it must be insulated
in order to prevent the flue gases from cooling and allowing
condensation to form;
-
Parts made from non-combustible materials
(it is absolutely prohibited the use of aluminium flue)
- capable of
withstanding combustion gases and potential condensation - must be used for mounting the flue gas pipes (for the
section from the appliance to the flue inlet);
-
It is forbidden to use fibre cement pipes to connect the appliance to the flue;
-
Flue gas conduits must not pass through rooms in which the installation of combustion devices is prohibited;
-
The flue gas conduits must be assembled in such a way as to guarantee adequate sealing of flue gases during low
pressure operation of the appliance;
-
The installation of horizontal sections is prohibited
;
-
It is prohibited to use counter sloping elements;
-
The flue gas pipe must allow for the recovery of soot or be cleanable, and must have a constant cross-section;
-
It is forbidden to allow other air intake conduits and system pipes to transit inside the flue gas pipes, even if they are
over-sized.
Below are examples of pipe
connections to the flue:
Chimney
The
chimney
is a device crowning the flue, used to ease dispersion of combustion products.
It must satisfy the following requirements:
-
It must have a usable outlet cross-section no less than double that of the flue onto which it is inserted;
-
In must be shaped in such a way as to prevent rainwater or snow from seeping into the flue;
-
It must be built in such a way as to ensure the discharge of combustion by-products even in the event of winds from
every direction and inclination.
