LA NORDICA MONOBLOCCO 600 PRISMATICO Anweisungen Seite 22

Figure 5 gives some examples of execution.
The minimum section must be 4 dm
lower than 200 mm or 6.25 dm
mm.
The draught created by the flue must be sufficient, but not excessive.
A too big flue section can feature a too big volume to be heated and consequently cause difficulties in the
operation of the device; to avoid this, tube the flue along its whole height. A too small section causes a
decrease of the draught.
(1) (2)
(3) (4)
Max. A+1/2A
Door for
(1) Sportello
cleaning
per
pulizia
(2) Representation of a correct flue with air-tight
door for the collection and discharge of solid
unburnt materials.
Figure 6
The flue must be properly spaced from any flammable materials or fuels through a proper
insulation or an air cavity.
It is forbidden to let plant piping or air feeding channels pass in the same flue. Moreover, it is forbidden to
create movable or fixed openings on the same for the connection of further other devices.
22
2
(for example 20 x 20 cm) for devices whose duct diameter is
2
(for example 25 x 25 cm) for devices with diameter greater than 200
(1) AISI 316 steel flue with double chamber insulated with material resistant to
400° C. Efficiency 100% excellent.
(2) Refractory flue with double insulated chamber and external coating in
lightweight concrete. Efficiency 100% excellent.
(3) Traditional clay flue square section with cavities. Efficiency 80% excellent.
(4) Avoid flues with rectangular internal section whose ratio differs from the
drawing. Efficiency 40% poor.
A
SI
YES
(1) The connection of more than one device to
the flue is not recommended.
Each device must have its own flue.
Instructions for installation, use and maintenance – EN – Rev.06
Monoblocks
Figure 5
NO
Figure 7