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NOTE:
Extraction devices operating in the same room as the
fireplace or in a jointly ventilated room can pose problems.
4.3. Combustion air supply
It is absolutely necessary to provide sufficient combustion
air to the fireplace insert. In Unico inserts, this is done from
outside the room through a suction unit.
The suction unit is equipped with a connector for the air
duct with a diameter of 0 98 or 0 125, depending on the
model, with the possibility of mounting it in one of three
designated holes.
Fig. 2.
The section of the air duct that reaches and connects with
the insert must be made of non-combustible materials
(steel or aluminium sheet). The use of plastic pipes (e.g.
PVC), is strictly prohibited.
The other end of the air pipe must be protected with a
ventilation grille that must be cleaned regularly.
In the case of inserts with a lifted glass, it is recommended
to provide an adequate convection air flow. Otherwise it
may lead to an increase in the temperature in the fireplace
chamber, and, as a consequence, damage bearings and
other elements of the insert, as well as the fireplace
housing.
It is recommended to protect the air intake from dust and
sand from the outside, which may damage the air intake
control mechanism.
4.4. Heating air circulation
For proper heat dissipation from hot elements of the insert
and the pipe to the room, appropriate cross-sections of the
heating air inlet and outlet should be provided.
The minimum area of the cold air inlet (at the base of the
2
fireplace) must be 50 cm
/1 kW of power generated by the
fireplace, assuming that the fireplace is used with
convection.
The minimum surface of the hot air outlet grille (in the
upper part of the housing) must be 40% larger than the
surface of the inlet, assuming that the fireplace is used with
convection. When using grilles with a mesh, the hole
surfaces should be doubled.
For heat-storing use, the inlet and outlet grilles are
individually
selected
depending
accumulated mass used.
Air grilles must be constructed in a way to prevent
clogging.
4.5. Chimney
One of the most important elements of the fireplace insert
installation is the chimney. Its proper performance often
has a decisive impact on the smooth and safe operation of
the entire system.
on
the
amount
of
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