Lacunza Sara, Инструкция

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INSTRUCTIONS FOR THE INSTALLER 9
2.

The air ducts must always be heat
insulated and smooth inside (not
corrugated).

The pipes must always have an
upward slant to facilitate movement by
air density.

On routes with a lot of load loss (a
lot of retention), air movement can be
forced along the ducts using a motor or
fan, provided that it is designed to
withstand
such temperature
conditions.
Bear in mind that air ducts mean that
noise travels more easily from one room to
another.
2.4. Chimney flue
The chimney flue must comply with
present standards on the installation of
chimneys.
In rooms equipped with Controlled
Mechanical Ventilation, the ventilation
outlet must never be connected to the
flue.
The appliance must always have its
own chimney flue, never sharing a chimney
flue with another appliance.
2.4.1. Type of flue
The flue must be made of special
material designed to resist the products of
combustion
(e.g. stainless steel,
enamelled steel, etc.).
Non-central-heating appliances
(without back boiler) require an insulated,
double-sleeve flue only on those sections
that run outdoors or through cold areas.
Single piping can be used inside the
building, the heat of the gases serving to
heat rooms, insulating only those sections
where excess temperature may cause
damage.
If the chimney is constructed, then it is
necessary to pipe and insulate it to ensure
correct updraught.
The diameter of the pipe must be the
same as the diameter of the flue socket on
the appliance over its entire length in order
to ensure correct operation.
The flue must prevent the entry of
rainwater.
The flue must be clean and airtight over
its entire length.
The flue must be at least 6m tall and
the chimney cap must not hinder the free
release of gases.
If the flue tends to suffer from
downdraught, then it is necessary to fit an
effective anti-downdraught cowl, a static
cowl or a smoke extraction fan, or reshape
the chimney.
Never make 90º bends, due to the great
loss of draught they cause, and reduce 45º
bends down to an absolute minimum.
Each 45º bend is equivalent to a 0.5m
reduction in flue length. Horizontal flue
sections should not be installed because
they cut updraught a great deal.
If the flue draws at more than 20 Pa on
12Pa appliances and more than 25Pa on
17Pa appliances, then an effective damper
must be fitted on the flueway. This
damper must be visible and accessible.
The chimney flue must not rest on the
appliance.
Bear in mind that high temperatures
may be reached in the flue, meaning that
it is essential that insulation be enhanced
in sections in which combustible material
is present (wooden beams, furniture, etc.).
It may even be necessary to protect non-
combustible material in order to prevent
breakage, deformation, etc., as a result of
overheating if the material is not designed
to withstand high temperatures.
It must be possible to clean the entire
flue, no sections being left inaccessible for
cleaning purposes.