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PLASMA 80:26 – 80v:30
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.
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.
6.
CONNECTION TO THE CHIMNEY
For safety reasons the door of the appliances with constructive
system 1, must be opened only for the loading of the fuel or for
removing the ashes, while during the operation and
of the hearth must remain closed.
The appliances with constructive system 2 must be connected to their
own flue. The operating with open door is allowed under supervision.
The connection pipe to the flue must be the shortest possible, right,
tight and according to the current regulations. Assembly of the
PROTECTION see Chapt. 17.
The connection to the chimney must be performed with stable and
strong pipes (we recommend a thickness of 2 mm). The pipe for
smokes exhaust must be fixed hermetically to the chimney. The
diameter inside the connection pipe must correspond to the external
diameter of the smokes exhaust small trunk of the stove. This is
ensured by pipes according to DIN 1298.
ATTENTION: Eventual flammable pieces in the area of 20 cm round
the connection pipes must be changed with fireproof
and not sensitive to heat materials.
For a good operation of the equipment it is essential that in the installation place it is introduced sufficient air for
combustion (see Chapt. 10).
The depression on the chimney should be 12 Pa (= 1,2 mm of water column). The measurement must be done
always with the equipment hot (rating calorific value). When the depression exceeds 17 PA (1.7mm of water column)
it is necessary to reduce the same with the installation of an additional flue adjuster (butterfly valve) on the exhaust
pipe or in the chimney.
For safety reasons the door of the stove must be opened only for the loading of the fuel or for removing the ashes,
while during the operation and
6.1.
CHIMNEY CAP POSITION
The draught of the flue depends also on the suitability of the chimney cap.
Therefore, if it is handicraft constructed, the output section must be more than twice as big as the internal section of
the flue.
As it is necessary to exceed the ridge of the roof, the chimney cap must assure the discharge also in case of windy
weather (Picture 4).
The chimney cap must meet the following requirements:
•
have internal section equivalent to that of the stack.
•
have a useful output section twice as big as the flue internal one.
•
be manufactured in such a way as to prevent the penetration of rain, snow, and any other foreign body in the
flue.
•
be easily checkable, for any possible maintenance and cleaning operation.
(1)
Industrial chimney
cap with pre-fabricated
elements – it allows an
excellent discharge of the
smokes.
7193601 – EN
the rest, the door
the rest, the door of the hearth must remain closed.
(2)
cap. The right output
section must be at least
twice as big as the
internal section of the flue
(ideal value: 2.5 times).
(1)
(3)
(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.
Handicraft chimney
(2)
(4)
Max.
A+1/2A
A+1/2A
A
Picture 3
(3)
Chimney cap for steel
flue with internal cone
deflector of smokes.
Picture 4
17
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