PRINCIPLE OF OPERATION
Small pellet-burning boiler- replace that is able to heat water to power
heating systems (radiators, heated towel rails, under oor heating panels)
also with heat recovery in the room where it is installed via the release of
a moderate amount of hot air (I).
The fuel (pellets) is transferred from the storage hopper (A) to the com-
bustion chamber (B) by means of a feed screw (R), which is driven by
a gear motor (D). The pellets are ignited by the air that is heated by an
electrical resistance (E) and drawn into the combustion chamber
by a smoke extractor (F). The fumes produced during the combustion pro-
cess are extracted from the hearth by the same fan and expelled through
the outlet (H) located on the upper part of the boiler- replace.
The ashes fall into the tray which is to be emptied periodically.
The hearth is made with an internal steel structure, and is closed in the
front by two overlapping doors.
- external glass ceramic door
- an inner door made from ceramic glass in direct contact with the re.
The fuel tank is located on the back part of the boiler- replace.
The tank is lled via a special tray (C) that can be opened from the front
part of the boiler- replace.
The water in the boiler- replace is heated and sent to the heating system
by the pump built into the boiler- replace.
The boiler- replace has a built-in closed expansion tank and overpressure
relief valve. Fuel quantity, smoke extraction and combustion air supply
and pump operation are all controlled by an electronic control board
(which is equipped with LEONARDO
stion ef ciency and low emissions.
The fan recovers a moderate amount of heat, suf cient enough to prevent
fumes that are too hot from escaping the chimney ue, causing a waste of
energy.
The air speed is electronically modulated on the basis of actual heat reco-
very needs. For this reason, the fan at low speeds could be off or operate
slowly; the system obviously favours an exchange with water.
Because of this, during the rst few days of boiler operation when it is
still clean and not dirty with deposits and condensation, the fan may not
switch on or may turn very slowly even at high powers.
The synoptic panel (M) which allows managing and viewing all the
phases of operation is installed under the glass door. The main phases can
also be managed via the remote control.
Leonardo
is a combustion safety and control system which allows op-
®
timal performance in all conditions. Leonardo® ensures excellent opera-
tion thanks to two sensors measuring the pressure level in the combustion
chamber and smoke temperature. The detection of and subsequent optimi-
sation of these two parameters is continuous in order to correct operation
anomalies in real time.
The Leonardo
system offers constant combustion, automatically regu-
®
lating the draft based on the characteristics of the chimney ue (bends,
length, shape, diameter, etc..) and environmental conditions (wind, humidi-
ty, atmospheric pressure, installations at high altitude, etc.). The standards
for installation must be respected.
Leonardo
®
system is also able to recognise the type of pellets and automa-
tically adjust the ow moment by moment to ensure the required level of
combustion.
FEATURES
®
software) to achieve high combu-
- 28
I
D
M
PELLET LOADING
Aconvenient front drawer allows you to load the
pellets in complete comfort, without having to
remove the hearth from its housing, and therefore
in absolute safety and in compliance with standards
EN 14785.
-
H
C
A
B
E
F
R