Immergas LUXOR Series User manual

PELLET BOILERS
LUXOR
Pellet boilers

3
INDEX
MAIN INDEX
1 LUXOR DESCRIPTION..........................................................................................................................................................................4
2 LUXOR FEATURES.................................................................................................................................................................................5
3 QUALITATIVE FEATURES OF THE PELLET ..................................................................................................................................7
4 LUXOR 16 MAIN DIMENSIONS.........................................................................................................................................................8
5 LUXOR 20  24 MAIN DIMENSIONS .................................................................................................................................................9
6 LUXOR 28  33 MAIN DIMENSIONS ...............................................................................................................................................10
7 HYDRAULIC CONNECTIONS TO THE SYSTEM.........................................................................................................................11
8 ANTI-CONDENSATION VALVE KIT CONNECTION (OPTIONAL)........................................................................................12
9 INSTALLATION ROOM FEATURES................................................................................................................................................13
10 MINIMUM INSTALLATION DISTANCES AND PROVISIONS...................................................................................................14
11 FLUE EXHAUST CONNECTION......................................................................................................................................................15
12 CONNECTION TO THE CHIMNEY................................................................................................................................................16
13 DRAUGHT REGULATOR OPTIONAL .........................................................................................................................................18
14 OPERATING PRINCIPLE....................................................................................................................................................................19
15 FEATURES OF THE INTEGRATED PELLET TANK.....................................................................................................................20
16 LUXOR TECHNICAL DATA...............................................................................................................................................................21
17 PRODUCT LABELLING ......................................................................................................................................................................24
18 AVAILABLE HEAD FLOW RATE GRAPHICS................................................................................................................................26
19 SYSTEM MINIMUM WATER CONTENT AND PUFFER PROBE .............................................................................................27
20 CONTROL PANEL ................................................................................................................................................................................28
21 SAFETY DEVICES.................................................................................................................................................................................29
22 P.C.B. FUNCTIONS...............................................................................................................................................................................31
23 NOTES ON MAINTENANCE AND CLEANING...........................................................................................................................32
24 LUXOR PRACTICAL WIRING DIAGRAM.....................................................................................................................................34
25 OPTIONAL .............................................................................................................................................................................................35
26 COMBINED STORAGE TANK UNIT FEATURES PUFFER.....................................................................................................36
27 OPTIONAL PELLET TANK 350 LITRES  225 Kg..........................................................................................................................42
28 OPTIONAL PELLET TANK 500 LITRES  320 Kg..........................................................................................................................43
29 HYDRAULIC DIAGRAM EXAMPLE: LUXOR + THERMAL SOLAR SYSTEMS....................................................................44
30 HYDRAULIC DIAGRAM EXAMPLE: LUXOR + CONDENSING BOILER..............................................................................45
31 WIRING DIAGRAM EXAMPLE: LUXOR + HEAT PUMP AND SYSTEM MANAGER..........................................................................46

LUXOR
4
LUXOR is the range of oor standing pellet boilers proposed by
Immergas for room central heating / C.H. systems and for the
production of DHW, with fan assisted open chamber with wide
ame/power modulation range, ideal for new, redevelopment
or in place of obsolete solid fuel generators.
e pellet is a particularly appreciated natural fuel that oers the
following important advantages: high caloric value and reduced
ash residue, savings in running costs, easy to use and nd.
anks to the reduced dimensions and high achievable power
(up to 33 kW), simplicity and ease of installation, the LUXOR
series boilers are the ideal solution for single family homes, but
also for small and medium-sized commercial buildings.
Particular attention to design was paid to search for maximum
energy eciency of the generator, as well as a high autonomy,
up to 56 hours with modulating operation (ref. LUXOR 28
and 33 models) and reduction of extraordinary maintenance
interventions.
All Immergas pellet boilers respect the maximum level of ef-
ciency of UNI EN 303-5 falling within class 5: the standard
classies the solid biomass boilers on the basis of eciency and
emissions of carbon monoxide (CO), gaseous organic carbon
compounds (OGC) and powder produced.
Class 5 is the only one that can benet from the Conto Termico
2.0; alternatively, the LUXOR series boilers can also benet from
the tax deductions in force.
Combined with a puer and possibly with a thermal solar sys-
tem, high levels of eciency can be achieved both from an eco-
logical and performance point of view. e thermal system can
also be integrated with a condensing boiler, providing additional
energy to the puer if renewable energy sources are insucient,
always ensuring maximum comfort at the lowest running costs.
Approved only for indoor installation in suitable technical vol-
umes or in a boiler room, they have an IPX 4D electrical protec-
tion; they are extremely simple to operate combined with very
minimal routine maintenance operations by the end customer.
e microprocessor electronics, allow an excellent control of
temperatures and, thanks to the LCD display always on view, an
excellent visibility of parameters and settings made.
For modern design, a number of dedicated options are available
for completing the system, such as:
• Anti-condensation kit, including mixing valve calibrated at
55 °C;
• Draught regulator kit, recommended on chimneys with long
sections (over 10 metres);
• Separated pellet tank kit with loading auger;
• Pellet loading control unit kit;
• Level sensor kit for pellet loading.
1 LUXOR DESCRIPTION

LUXOR
5
2 LUXOR FEATURES
Range of pellet boilers formed by 5 central heating / C.H. models
for open room base central heating and high performance fan
assisted (type B23), (up to 92.1% ref. model LUXOR 20), with
power from 16 to 33 kW, which may only be installed inside
technical rooms.
• Operation only and exclusively with 6 mm pellet, it is recom-
mended to use pellet certied in EN PLUS A1 class;
• Carbon steel combustion chamber made of 16 vertical smoke
pipes with variable length according to power;
• Practical mechanical removal systems of unburnt residues of
the heat exchanger thanks to special turbulators placed inside
the smoke pipes, driven by a manual pipe scraper lever;
• Brazier with cast iron crucible, removable for its cleaning;
• Practical ash drawer under the crucible where combustion
takes place;
• High eciency heat exchanger characterised by wide water
passages and relative low clogging risks;
• Wide modulation range (up to about 20% for the LUXOR 33
model);
• Integrated pellet tank with loading auger, with a 46 kg capacity
(LUXOR 16), 60 kg (LUXOR 20 - 24) and 80 kg (LUXOR 28
- 33);
• Maximum autonomy: up to 56 hours wth modulating opera-
tion (ref. LUXOR 28 - 33 models);
• Boiler class 5 (according to EN 303-5) with regard to polluting
emissions and eciency;
• Vermiculite insulated door with double coating and hook
closure with handle;
• Practical top door for pellet loading;
• Grey fully removable panelling (RAL 9600);

LUXOR
6
• Low power consumption system circulator, preset as standard;
• Automatic air vent valve;
• Insulation with 30 mm thickness non-allergenic synthetic wool
around the heat exchanger body;
• Variable speed suction fan, electronically controlled by inverter
board;
• Automatic pellet conveyor auger controlled by P.C.B.;
• Advanced ignition system thanks to the presence of a ceramic
electrode, with ignition time between 60 and 90 seconds which
ensures speed and reliability over time;
• Control panel that can be installed as required, on the side
panels, right or le, for setting the main settings;
• Self-diagnostics system with display of the operating status
and anomalies;
• Electrical safety against power surges by means of a main fuse;
• IPX 4D electrical insulation rating;
• 2.5 bar safety valve and 8-litre diaphragm expansion vessel /
expansion tank integrated as standard;
• Other standard devices and functions present:
- puer NTC probe;
- 100 °C water limit NTC probe;
- 100 °C water manual reset safety thermostat;
- ue temperature probe (polarised thermocouple);
- ue pressure switch to check correct fan and ue exhaust
circuit operation;
- electronic pressure control of the system by means of pres-
sure transducer;
- antifreeze function;
- pump anti-block function;
- system postcirculation function;
- pre-ventilation function for combustion chamber washing;
- automatic brazier cleaning function.
• Can be combined with a wide range of optional items to com-
plete the system.
It is available in the model:
• LUXOR 16 code 3.028481
• LUXOR 20 code 3.028482
• LUXOR 24 code 3.028483
• LUXOR 28 code 3.028484
• LUXOR 33 code 3.028485

LUXOR
7
e pellet consists of pressed wooden cylinders, produced
from sawdust and woodworking (shavings and sawdust). Being
obtained from woodworking waste, it respects the ecosystem
because it does not require the knocking down of new trees.
As required by current legislation governing the product features
of fuels, it must be produced exclusively with untreated sawdust,
without other added materials.
e binding capacity of the lignin, contained in wood, allows
to obtain a compact product without adding additives and
chemical substances unrelated to wood: therefore, a high yield
natural fuel is obtained.
Use of poor quality pellets or other unsuitable materials may
damage certain components of the boiler and compromise its
correct operation.
For the Immergas boilers only use with 6mm diameter, 30 mm
long pellets having maximum 6% humidity. Store the pellets
away from sources of heat, and not in humid areas or explosive
environments.
It is recommended to use EN PLUS A1 certied pellets ac-
cording to ISO 17225-2.
3 QUALITATIVE FEATURES OF THE PELLET
Parameter U.M. EN PLUS-A1 EN PLUS-A2
Diameter (D) mm 6 (± 1) 6 (± 1)
Length (L) mm 31,5 ≤ L ≤40 31,5 ≤ L ≤40
Water content (M) %tq 1≤ 10 ≤ 10
Ashes (A) 3 2%ss 1≤ 0.7 ≤ 1.5
Mechanical durability (DU) %tq ≥ 97.5 ≥ 97.5
Fine particles (< 3.15 mm) %tq < 1 < 1
Additives %ss ≤ 2 ≤ 2
Net caloric value (Q) MJ/kg tq 16.5 ≤ Q ≤ 19 16.3 ≤ Q ≤ 19
Apparent density (BD) kg/m3≥ 600 ≥ 600
Nitrogen (N) %ss ≤ 0.3 ≤ 0.5
Sulphur (S) %ss ≤ 0.03 ≤ 0.03
Chlorine (CI) %ss ≤ 0.02 ≤ 0.02
Arsenic (As) %ss < 1 < 1
Cadmium (Cd) %ss ≤ 0.5 ≤ 0.5
Chromium (Cr) %ss ≤ 10 ≤ 10
Copper (Cu) mg/kg ≤ 10 ≤ 10
Lead (Pb) mg/kg ≤ 10 ≤ 10
Mercury (Hg) mg/kg ≤ 10 ≤ 10
Nickel (Ni) mg/kg ≤ 10 ≤ 10
Zinc (Zn) mg/kg ≤ 100 ≤ 100
Melting point of ashes (DT) 3°C ≥ 1200 ≥ 1100
1) tq = as is - ss = dry substance
2) determination at 550 °C
3) in this case the ashes must be produced at 815 °C

LUXOR
8
4 LUXOR 16 MAIN DIMENSIONS
KEY:
REF. Description
A1 System ow
A2 System return
C Pressure discharge valve
D Combustion air intake
E Flue gas exhaust
F Position of main power supply switch
GControl panel
H Water temperature probe
Iermostat
SYSTEM
RETURN
SYSTEM
FLOW

LUXOR
9
5 LUXOR 20  24 MAIN DIMENSIONS
KEY:
REF. Description
A1 System ow
A2 System return
C Pressure discharge valve
D Combustion air intake
E Flue gas exhaust
F Position of main power supply switch
GControl panel
H Water temperature probe
Iermostat
SYSTEM
RETURN
SYSTEM
FLOW
A2A1

LUXOR
10
6 LUXOR 28  33 MAIN DIMENSIONS
KEY:
REF. Description
A1 System ow
A2 System return
C Pressure discharge valve
D Combustion air intake
E Flue gas exhaust
F Position of main power supply switch
GControl panel
H Water temperature probe
Iermostat
A2A1
SYSTEM
RETURN
SYSTEM
FLOW

LUXOR
11
SFIATO
VALV OLADI
SICUREZZA
SYSTEM
RETURN
SYSTEM
FLOW
7 HYDRAULIC CONNECTIONS TO THE SYSTEM
e LUXOR 16-20-24-28-33 models are created to work with
closed vessel systems (the vessel itself is standard supplied with
the generator, capacity 8 litres).
ATTENTION: wanting to create open vessel systems, it is nec-
essary to ensure that the minimum pressure switch (calibrated
at 0.6 bar) does not intervene.
e connections to be made concern the system ow and return
and the conveyor of the safety valve drain.
Always install shut-o valves on the system ow and return for
easy routine and/or extraordinary maintenance. In addition it
is also necessary to install a draining valve to empty the boiler.
NOTE: the drain of the safety valve can be conveyed with the
exible hose even in a higher position, using a pre-section next
to the system ow pipe, to facilitate connection of the valve drain
without creating counter-slopes (if it is necessary to connect to
a higher drain).
Position of safety valve drain
(LUXOR 16)
Position of safety valve drain
(LUXOR 20 - 24)
Position of safety valve drain
(LUXOR 28 - 33)
LUXOR 16 arrangement of connections
LUXOR 20 - 24 - 28 - 33 arrangement of connections
SAFETY
VENT
VALVE
SAFETY
VENT
VALVE
SAFETY
VENT
VALVE
A2A1
C
SYSTEM
RETURN
SYSTEM
FLOW

LUXOR
12
8 ANTI-CONDENSATION VALVE KIT CONNECTION (OPTIONAL)
It is essential for these types of boilers to mount a mixing valve
calibrated at 56 °C (see optional kit); this prevents the return
of water too cold in the boiler, thus preventing the forming
of condensate and corrosion, which inevitably cause a rapid
deterioration of the thermal exchange surfaces, thus extending
the life of the boiler.
Description of operation:
e anti-condensation valve integrates a thermostatic cartridge
which closes passage “A” (return) until the boiler water (which
recirculates from passage “B” of the valve) reaches the nominal
temperature (56 °C).
Once the nominal temperature is reached, the thermostatic
cartridge begins to gradually open the system return circuit
“A” (cold) mixing it with the system ow “B” (hot), ensuring
a nominal temperature to the “AB” generator (boiler return).
ATTENTION: All LUXOR models are EN 303-5 certied and
have overcome the safety tests provided by the standard, having
in particular met the test referred to in point 5.14 (“rapid dis-
connection system”). It is, therefore, not necessary to provide
coils or thermal safety discharges.
Technical Data
Max. operating pressure 6 bar
Max. operating temperature 95 °C
KVS (A-AB switching) 5.4 m3/h
KVS (B-AB switching) 5.5 m3/h
Inside diameter DN 20
Connections 3 x G 3/4" M
O-ring Ø 45 x 3 mm
Body material Brass
Spring material Steel
Gasket / Seal material EPDM
NOTE: the above gure represents the LUXOR 20-24-28-33
models, as for the LUXOR 16 model, the system ow and return
are inverted in position with respect to all other models.
Always install shut-o valves on the system ow and return for
easy routine and/or extraordinary maintenance. In addition it
is also necessary to install a draining valve to empty the boiler.

LUXOR
13
40 cm
Min.
100 cm2
40 cm
40 cm
For all information and any further clarications, refer to Stand-
ard UNI 10683:2012.
In the event of installation with other central heating appliances,
provide for suitable air inlets for each of them (according to the
instructions of each product).
It is not permitted to install the product in residential spaces:
- that have appliances supplied with liquid fuel with continuous
or discontinuous operation that take combustion air from the
room in which they are installed;
- in areas where type B gas appliances are installed to heat the
rooms, with or without production of domestic hot water, and
in adjacent or communicating rooms;
- in areas in which the measured operating negative pressure
between the external and internal technical room exceeds 4 Pa.
It is forbidden to position the product in bedrooms, bathrooms,
garages and, in general, in places with a re risk.
Boiler room.
Check that the room meets the requirements and characteristics
of regulations in force.
e minimum volume of the room where to install the appli-
ance is indicated by the manufacturer and, however, it is greater
than 15 m3.
Also check that the room oor is suitable to withstand the weight
of the boiler.
It is also necessary that at least as much air as required
for regular combustion enters the room: therefore, make
openings in the room walls with a free section of at least
6 cm2for each kW (859.64 kcal/h) of installed thermal capacity.
e minimum section of the opening must not be less than
100 cm2.
e section can be calculated by using the following:
S = K * Q ≥ 100 cm2, where “S” is expressed in cm2, “Q” in kW,
“K” = 6 cm2/kW.
ese openings must be protected by grid, wire mesh or suit-
able protection provided that the minimum cross-section is
not reduced and positioned so as to prevent them from being
obstructed.
e ow of combustion air can also be obtained from a room
adjacent to that of installation, provided that:
- said room is not used as a garage, fuel warehouse or, in any
case, for activities with re-hazard, as a bathroom, bedroom
or common room;
- this ow is free through permanent non-closable openings,
communicating with the outside.
9 INSTALLATION ROOM FEATURES

LUXOR
14
40 cm
Min.
100 cm2
40 cm
40 cm
10 MINIMUM INSTALLATION DISTANCES AND PROVISIONS
Observe the following instructions:
- the boiler must be connected to a central heating system and/
or production network of domestic hot water, in compliance
with its performance and power;
- it is necessary to also consider all national, regional, provincial
and municipal laws and regulations of the country of instal-
lation of the appliance;
- check that the oor is not ammable, use a suitable platform
if necessary;
- there must be no hoods with extractor or collective ventilation
ducts in the room where the heat generator is to be installed; if
these appliances are located in adjacent rooms and communi-
cating with the installation room, the simultaneous use of the
heat generator is forbidden where there is a risk that one of
the two rooms has negative pressure with respect to the other;
- it is not permitted to install in bedrooms or bathrooms;
- for hydraulic connections it is advisable to use pipes with
adequate diameter;
- the boiler is equipped a ue gas fan for extracting exhaust
gases and works with a negative pressure combustion chamber.
Distance from objects.
e boiler must be installed in such a way that it can be inspected
from all sides. erefore, you must respect a minimum distance
of 40 cm at the back and sides. It is also recommended to keep
the pellets and ammable materials at a safe distance.
Objects or parts that are heat sensitive, or ammable, cannot be
stored in contact with the product; these objects must be kept at
a minimum front distance of 80 cm from the outermost design
point of the product.

LUXOR
15
2
11 FLUE EXHAUST CONNECTION
Connection between the appliance and the ue must be made
with a ue exhaust duct compliant with EN 1856-2.
For proper operation, the length of the sub-horizontal section
must not exceed 2 m, with a minimum slope of 3% and with a
maximum number of three 90° curves (that can be inspected -
the appliance’s "T" tting outlet must not be calculated).
e diameter of the ue duct must be equal to or greater than
the appliance’s outlet.
Use ue ducts with silicon gaskets or similar sealing devices
that can withstand the appliance’s operating temperatures (min
T400 class P1).
It is forbidden to use metal exible pipes made of cement bre
or aluminium.
For changes in direction, it is recommended to always use a "T"
tting with an inspection cap, which facilitates regular cleaning
of the pipes.
Always make sure that the inspection caps are closed and sealed
with their relative gasket intact aer cleaning.
It is forbidden to connect the same ue duct to multiple appli-
ances, or with discharge from overhead hoods.
It is forbidden to install the combustion product’s exhaust di-
rected to the wall, or towards closed spaces and open air.
e ue duct must be minimum 400 mm away from ammable
construction or heat sensitive elements.
In particular, it is recommended to check the chimney data
nameplate for the safety distances to respect in the presence of
combustion materials and the type of insulating material to use.
ese provisions must be strictly complied with in order to
prevent serious harm to one’s health and safeguard the integrity
of the building.
When making the hole to pass the ue exhaust pipe, you must
take the presence of any ammable materials into consideration.
If the hole is to cross a wooden wall or, in any case, a wall of
reduced resistance to temperature, it is advisable to use the ap-
propriate crossover kits, available on the market and adequately
insulate the ue exhaust pipe using suitable insulating materials
(thickness 1.3 ÷5 cm with minimum thermal conductivity of
0.07 W/m°K).
In outer sections, it is recommended to use a pipe with a double
insulated wall to prevent the onset of condensate.
e combustion chamber operates in negative pressure.
H > 1.5 m
H > 4 m

LUXOR
16
e chimney is very important for correct operation of a solid
fuel appliance.
A qualied technician must check the chimney’s eciency.
e chimney must always be clean since soot deposits reduce the
section and block the draught, thus compromising proper oper-
ation of the boiler; in large quantities, they may even catch re.
e following information was drawn up in accordance with
the provisions of European regulations (EN13384 - EN1443 -
EN1856 - EN1457).
Flue gas exhaust must be conveyed on a single chimney with
insulated steel pipes (A) or on an existing chimney that complies
with the intended use (B) - see gure below.
It is not permitted to discharge combustion products into col-
lective pipes.
A simple cement sha must be duly ducted with the relative pipe
operating with negative pressure.
It is not allowed to use extensible exible metal pipes.
Both solutions require an inspection cap (AT) and/or a small
inspection door (AP) and a suitable collecting device for any
condensate - refer to the gure below.
It is forbidden to connect several pellet devices or any other type
of device (vent hoods...) to the same ue.
A chimney that services a pellet device must meet the following
requirements:
- be made with materials that can withstand mechanical stress,
heat, action of combustion products and their condensate over
time;
12 CONNECTION TO THE CHIMNEY
- be made with waterproof materials against ue gas, conden-
sate, thermally insulated and suitable to withstand normal
mechanical stress over time;
- have a vertical performance with axis deviations not exceeding
45° and without constrictions;
- must be suitable for specic operating conditions of the prod-
uct and provided with CE marking (EN1856-1, EN1443);
- be sized correctly in order to meet the ue gas draught/disposal
required to regulate product operation (EN13384-1);
- be adequately insulated to prevent condensate and reduce the
eect of ue cooling;
- must be minimum category T400 and withstand soot re.
In particular, it is recommended to check the data plate of
the chimney (according to EN1856-1, EN1443) for the safety
distances that must be respected in the presence of or passing
through of combustion materials and the type of insulating
material to use.
ese provisions must be strictly complied with in order to
prevent serious harm to one’s health and safeguard the integrity
of the building.
e chimney’s opening must be in the same room in which
the appliance is installed or, at most, in the adjacent room, and
to install a soot and condensate collection chamber under the
opening, which can be accessed from the metal sealed door.
CHIMNEY
Backow area
Backow area

LUXOR
17
Chimney dimensioning.
e negative pressure (draught) of a chimney also depends on
its height.
e chimney must be sized to ensure a draught between 8 Pa
and 15 Pa.
e internal section of the chimney can be round, square or
rectangle (the ratio between the internal sides must be ≤1.5)
with the sides connected with a minimum 20 mm radius.
e internal dimensions of the chimney must not exceed 20 x 20
cm or 20 cm diameter; in case of larger dimensions or unsuita-
ble chimney conditions (e.g. cracks, poor insulation, etc.), it is
advisable to insert a stainless steel pipe (ducting) of adequate
diameter inside the chimney, along its entire length, up to the top.
Provide an inspection at the base of the chimney for periodic
check and annual cleaning.
Below are a few examples of chimneys available on the market.
VERY GOOD
AISI 316 steel
chimney with double
insulated chamber
with ceramic bre or
equivalent resistance
up to 400°C.
GOOD
Refractory chimney
with double insulating
chamber and external
sleeve in lightweight
concrete made from a
clay type of honeycomb
material.
Chimney pot.
Check that a windproof chimney pot is installed according to
the regulations in force.
e chimney pot is a vital element for the heating appliance to
operate well: it is recommended to have a windbreaker type of
chimney pot (ref. A) with respect to other types of chimneys
(ref. B or C) - see gure below.
e area provided for ue gas exhaust openings must be mini-
mum double the section of the ue/dusted pipe and adjusted in
such a way that ue exhaust is ensured, even if windy.
It must prevent rain, snow and any animals from entering. e
atmosphere outlet height must be outside the backow area
caused by the shape of the roof and any obstacles nearby.
AVERAGE
Traditional square
clay chimney with
empty insulating
inserts.
POOR
Avoid chimneys with
internal rectangular
sections whose ratio
between the largest and
smallest side is greater
than 1.5 (e.g. 20 x 40 or
15 x 30).

LUXOR
18
Manopola
graduata
e draught regulator (optional kit to be placed in the appliance
installation room), constantly compensates for possible draught
variations inside the chimney, as the outdoor atmospheric con-
ditions change.
Operation: when the negative pressure exceeds the desired
value (settable on the regulator in Pa), the draught regulator
ue adjusting device automatically opens and allows air to
enter the duct.
is dilutes the combustion products with consequent sta-
bilisation of the ue temperature, and generates a controlled
reduction of the draught until the desired value and preset on
the regulator is reached.
e installation of this kit is recommended on chimneys with
long sections (e.g. over 10 m) or with large diameters.
e draught regulator has a diameter of 150 mm; it is suitable
for chimneys with diameters varying from 150 to 300 mm.
13 DRAUGHT REGULATOR OPTIONAL
Graduated knob
Min 0.4 m
Max 2.5 m

LUXOR
19
1
2
3
4
5
6
7
8
14 OPERATING PRINCIPLE
e high combustion quality is guaranteed by an electronic
microprocessor that regulates and optimises the fuel inlet (6
mm pellet) that, falling from the main tank, ows into a worm
screw auger, fed by an electric gearmotor (controlled by the same
P.C.B.) which, according to its speed, makes more or less pellets
arrive inside the combustion chamber.
e P.C.B. also controls an inverter for fan operation for the
expulsion of the ue gas, also creating the right negative pressure
to draw the correct amount of inlet combustion air from the
room (where the boiler is located).
With normal combustion, the ame must have a tapered, com-
pact shape and be “lively” with tips that are mainly vertical or
pressed against the back of the furnace.
e power supplied by the boiler is automatically modulated,
depending on the heat requested by the P.C.B..
e ability to modulate the power avoids continuous switching
on and o of the boiler, thus maintaining very high eciency.
By falling, the pellet arrives in the cast iron crucible where, inside
the carbon steel chamber (resistant to very high temperatures)
the actual combustion takes place.
At rst ignition or re-ignition aer a switch-o for reaching the
temperature, there is an incandescent electrode which allows to
fully automatically ignite the ame.
e electrode resistance, located under the crucible, heats the
combustion air at a very high temperature (hairdryer eect)
which in turn, ignites the pellet in the brazier itself.
e hot ue gas produced directly by combustion are directed
towards a row of 10 heat exchange pipes (smoke pipes) with the
system water (1st round of smoke), made to move by a very low
electric consumption circulator located on the boiler return.
e hot ue gas meets a vermiculite cover and is channelled
along the other 6 pipes located on the back of the boiler, giving
water the additional heat present in the ue gas before their
expulsion (2nd round of smoke), by means of the fan.
ere are turbulators inside the smoke ducts that are manually
operated via a special lever, to clean the heat exchanger surfaces,
as well as ensure and maintain an optimal heat exchange.
KEY:
1 - Pellet tank
2 - Pellet loading auger
3 - Circulation pump
4 - Fan
5 - Incandescent electrode
6 - Crucible
7 - Smoke pipes
8 - Manual pipe scraper lever

LUXOR
20
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
EN plus A1
LUXOR 16 LUXOR 20 LUXOR 24 LUXOR 28 LUXOR 33
90
75
60
45
30
15
0
(70 litri)
46 kg
(92 litri)
60 kg
(92 litri)
60 kg
(123 litri)
80 kg
(123 litri)
80 kg
15 FEATURES OF THE INTEGRATED PELLET TANK
TECHNICAL DATA LUXOR 16 LUXOR 20 LUXOR 24 LUXOR 28 LUXOR 33
Pellet consumption at maximum power kg/h 3.37 3.9 4.8 5.5 6.4
Pellet consumption at minimum power kg/h 1.02 1.2 1.2 1.4 1.4
Combustion autonomy at maximum pow. h 13.5 15.5 12.5 14.5 12.5
Combustion autonomy at minimum pow. h 45 50 50 56 56
(70 Litres) (92 Litres) (92 Litres)
(123 Litres) (123 Litres)