EdilKamin SCREEN 80 Installation, Usage Et Maintenance page 20

C
C = smoke outlet valve
Y = smoke path with
door open
Y
TECHNOLOGY
The air for heating
- with natural convection (N)
The air from the environment enters the air-casing opening and reaches
the mantle where it rises due to the heat obtained through the mantle's
contact with the structure of the internal hearth; in order to improve the
efficiency of the thermal exchange, the air passes through a system of
flaps, which acts as a conveyor. At the end of the passage, the heated
air comes out of the frontal grille and the 2 large outlets on top of the
mantle. In the natural version, the metal covers must be removed from
these 2 outlets (* Fig.9) in order to make the most of the heat, as well
as to avoid excessive overheating.
It is for this reason that, if the fireplace is equipped with an outer cove-
ring, grilles must be installed upon both the upper and lower cove-
rings in order to create a convective flow which keeps the system from
overheating
- with forced ventilation (V)
Contrary to the natural version, the ventilated version is equipped with a
free-passage 800 m3/h fan (fig.10) and with an electronic regulator for
managing ventilation power.
Based on the system's temperature, which is detected by a sensor
located ON THE AIR FLOW CHAMBER, the regulator will automatically
increase or decrease the fan's power in order to avoid expelling air that
is too cold. In manual mode, the fan's power level is set by the user,
though the regulator will continue to block the air flow if the system is
cold.
It is for this reason that, when starting the fireplace, the fan will be off;
the fan will activate itself once the air has reached a suitable tempera-
ture (50° C). Once the fire has burnt out, in order to make the most of
the heat stored in the fireproof materials, the fan will continue to opera-
te as long as the air remains at a suitable temperature (the fan will stop
fig.10
once the temperature goes below 50 °C).
Operating principle
The SCREEN fireplace comes equipped with a remote control (refer to
the instructions on page 29) for setting the automatic or manual ventila-
tion modes, as well as the power setting for the latter. The fan causes the
heating air to circulate within the environment by drawing it in from below,
where the air is coldest, and expelling it from above. Prolonged use of the
same air can excessively dehumidify the environment and cause anyone
present to feel uncomfortable. Older generation fireplace models required
the environment to be periodically ventilated, by opening a window for
example, thereby reducing the temperature of the internal environment. The
SCREEN fireplace is equipped with an innovative technology which allows
for a small amount of external cold air to be drawn into it; rather than sen-
ding the cold external air directly into the internal environment, the SCREEN
fireplace heats it first and only subsequently expels it into the room. The fan
casing (No.14 fig.2) is equipped with an air intake with an automatic valve,
fig.11
as shown in fig.11; by connecting the intake with a local external air duct,
by means of a flexible aluminium tube, the system will aspirate the right
amount of external air in order to integrate that of the internal environment.
This intake's valve, which has been pre-calibrated during manufacture, is
automatically opened by the power of the fan itself. If the fan is operating
at its maximum power, an increased amount of external air will be drawn in
so as to compensate for the increased amount of air passing through the
system.
Anti-smoke device
SCREEN is equipped with a very wide door. It is normal for smoke to come
out of the hearth when wood is being loaded, especially when the chimney
flue has a low draught; SCREEN solves the problem thanks to the automa-
tic reduction when the door is opened, by opening the throttle valve. The
button in the central top position causes the valve to open and close ac-
cordingly, when the door is opened and closed. Should it be difficult for the
smoke to clear (low draught), this can be helped by turning the screw found
on the damper control rod. By turning the screw clockwise and closing the
door, the damper remains slightly inclined, thus allowing the smoke to flow
out more easily.
- 20
-