BurnPell M50 User manual

User Manual
Pellet burners
M50-130 line
2023/04

1 | S t r o n a
CONTENTS
1. GENERAL INFORMATION .............................................................................................. 3
1.1. Transport ............................................................................................................. 3
1.2. Storage ................................................................................................................ 4
1.3. Inspection of burner delivery .................................................................................. 4
1.4. Free space around the burner ................................................................................. 4
2. PRODUCT DESCRIPTION .............................................................................................. 5
2.1. Technologies employed .......................................................................................... 5
2.2. Design of M50, M70, M100, M130 burners ................................................................ 7
2.3. Pellet quality requirements ..................................................................................... 8
2.4. Burner dataplate example ...................................................................................... 9
2.5. Burner specifications ........................................................................................... 10
2.6. Burner safety systems ......................................................................................... 12
2.7. STB protection .................................................................................................... 12
2.8. Boiler temperature sensor .................................................................................... 12
2.9. Controller specifications, description of functions and burner settings ........................ 13
3. INSTALLATION .......................................................................................................... 13
3.1. Stack ................................................................................................................. 13
3.2. Boiler / oven ....................................................................................................... 14
3.3. Fuel hopper ........................................................................................................ 15
3.4. Screw feeders ..................................................................................................... 16
3.4.1. Screw feeder, type 1 ...................................................................................... 16
3.4.2. Screw feeder, type 2 ...................................................................................... 17
3.5. Feeder setting ..................................................................................................... 18
4. INSTALLATION OF BURNER AND FEEDER ..................................................................... 18
4.1. Connecting the feeder .......................................................................................... 19
4.2. Fixing the burner in the boiler ............................................................................... 20
4.3. Connecting the controller ..................................................................................... 21
5. FIRST START-UP ....................................................................................................... 22
5.1. Preparing for the first start-up .............................................................................. 22
5.2. External feeder calibration procedure ..................................................................... 23
6. OPERATION AND SAFETY REGULATIONS ...................................................................... 25
6.1. Operation ........................................................................................................... 25
6.2. Maintenance of the furnace plate ........................................................................... 25
6.3. Specification of inspection intervals ....................................................................... 28
6.4. Scope of operations ............................................................................................. 28
6.5. Safety regulations for burner installation and operation ............................................ 28
6.6. Warranty ............................................................................................................ 29
7. SERVICING THE EQUIPMENT ...................................................................................... 29
7.1. Flame sensor ...................................................................................................... 30
7.2. Replacing the igniter ............................................................................................ 30
7.3. Cleaning the feeder tube ...................................................................................... 31

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7.4. Cleaning the burner ............................................................................................. 31
8. CAUSES OF MALFUNCTION ........................................................................................ 31
9. WIRING DIAGRAMS .................................................................................................. 34
9.1. BurnPell controller wiring diagram ......................................................................... 34
9.2. Wiring diagram of M50, M70, M100, M130 burners .................................................. 34
10. REPORTS............................................................................................................... 35
10.1. Initial start-up report ........................................................................................ 35
10.2. Inspection report ............................................................................................ 35
11. LIST OF FIGURES AND TABLES ................................................................................ 37
12. NOTES .................................................................................................................. 38
Dear User
Thank you for choosing our product. As a manufacturer with many years of experience, we
guarantee that every day of our work, research and constant striving to improve production
technology is reflected in the quality of our burners. Our mission is to produce ecological and
environmentally friendly equipment. We believe that your choice is a conscious one and is
associated with certain expectations, so we make every effort to meet them using the best available
technologies. Years of experience in the adaptation of burners ranging from residential heating
applications through industry and agriculture to manufacturing have taught us that in order to meet
the most diverse conditions of burner operation, it is necessary to apply the principle of an
uncompromising approach to the quality of components and materials used. We do this for your
comfort, and enjoy the ever-increasing number of satisfied users who have put their trust in the
BurnPell.
Author of this User Manual is UAB KOMERTA
It is possible to use it in whole or in part in any publications only after a prior written
consent of the author.

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1. GENERAL INFORMATION
READ THIS MANUAL CAREFULLY BEFORE STARTING THE BURNER.
It is required that the BurnPell burner be installed in accordance with this manual. Following
the recommendations of this manual will guarantee the safe operation and installation of the device.
Any doubts and ambiguities, regarding the various functions of the burner components and its
equipment, should be reported to the dealer for clarification.
Burner installation should be performed by a service technician authorized and trained
by the Manufacturer.
Improper installation may void the warranty!
Any user of boiler heating equipment, should know and comply with all related local laws,
especially before putting the heating system into operation, in accordance with the
construction law.
The burner manufacturer shall not be held liable for failure to comply with the applicable
provisions of the Construction Law and regulations harmonized with it, execution of the
heating system, improperly installed or improperly selected boiler. If the burner installed
in a manner inconsistent with the recommendations of BurnPell it shall not be covered
by the manufacturer's warranty, and any repairs to remove the consequences of failure
resulting from such an installation will be carried out against payment.
1.1. Transport
BurnPell burners are packed in cardboard boxes (burner with mounting flange and feeder),
electronic devices (controller, sensors) are additionally protected in a separate cardboard box. The
device should be transported in packaging, according to the marking on the box. Protect the
burners, during transportation, from adverse environmental conditions (snow, rain, dust), damage
to packaging, and do not expose them to shocks and impacts.
Loading and unloading should be carried out in such a way that the device is not exposed to shocks.
Improper loading, unloading and transportation (throwing, violent moving, pressing with heavy
products) can cause damage to the product.
If the packaging or product is damaged, the device should be inspected for functionality. If you find
the fan or feeder motor not working properly (noisy operation, rubbing), or other malfunctions e.g.
of electronic components (missing characters on the liquid crystal display screen), report this fact
to the PellasX service centre for verification. The service department will individually and
meticulously examine your notification and take appropriate steps to solve the problem.
Shipments delivered by forwarding companies should be checked with the courier at the
time of receipt, and if any discrepancies are found, a protocol should be drawn up stating
the extent of the damage.

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1.2. Storage
BurnPell burners should be stored under environmental conditions consistent with the
following recommendations:
 Dry and ventilated rooms, free from substances such as gases, liquids and corrosive fumes,
oily vapours that are harmful to the burner. Do not store the burner and feeder in rooms
where fertilizers, chlorinated lime, acids, chemicals, etc. are stored.
 The storage temperature of the burner should be between +5ºC and +40ºC, and the relative
humidity should not exceed 70%.
 During storage, the device must not be in direct contact with the ground. The burner to be
finally installed in the boiler should be stored in a cardboard box or on a pallet. Equipment
can be stored and transported in up to three layers.
 If the burner is stored more than 2 years from the date of manufacture or in environmental
conditions that do not comply with the above provision, it should be subjected to a
commissioning test by an authorized service technician before installation. As a proof of
proper quality and safety of the burner, the above test should be documented in the warranty
card.
 The correct functioning of all electrical and mechanical components of the burner, such as
drives, fan, igniter, light and temperature sensors should be checked. Any identified
problems in operation or incorrect sensor indications will disqualify the device from being
put into operation.
1.3. Inspection of burner delivery
Before proceeding with assembly operations, check the condition of the packaging and make
sure that there is no visible damage to it and that the shipment is complete and undamaged. Any
reservations and problems should be reported immediately to the supplier, who is responsible for
the insurance of the goods.
1.4. Free space around the burner
Follow the local safety regulations for boiler heating equipment and provide a free space of
at least 1 meter around the boiler and space for burner maintenance. The required service space
around the burner must not be limited in any way by the requirements of the boiler manufacturer
that uses BurnPell burners as a standard equipment for its products. Failure to provide access to
the burner may cause difficulties in its normal use and maintenance, which may result in charging
additional service costs resulting from the need to completely dismantle the burner for maintenance
and repair work.
CAUTION!
To reduce the risk of fire, do not store flammable
materials near the burner (minimum distance of 1m).
CAUTION!
The burner manufacturer is not responsible for
equipment put into operation despite malfunctions or
defects found which were caused by damage due to
improper storage and transportation.

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The boiler room should be clean, dry and well ventilated. The amount of air supplied to the boiler
room should be equal to or greater than the amount of flue gas exhausted through the chimney.
2. PRODUCT DESCRIPTION
BurnPell is a brand under which biomass burners have been manufactured since 2001. They
are characterized by infinite adjustment of settings allowing them to be used in any type of stove
or boiler. BurnPell burners are successfully used in modernized boilers, i.e. in those where the heat
source has been changed from an oil, gas or coal burner to a pellet burner. The advanced burner
controller used by BurnPell has a wide range of control options for the heating system, which means
that the boiler modernization does not result in the need for changes in the existing installation.
Also, the application of BurnPell burners for the production of technological heat in industry or
agriculture has been prepared for easy configuration and cooperation with the control devices of
industrial systems which use the heat produced by the pellet burner. Firing up, keeping the fire
burning after the set temperature has been reached and fuel feeding are performed automatically.
Wide possibilities of defining the operation modes make the burner very flexible in adapting to the
conditions in which it is to be used, both in terms of its operation and the operation of the systems
to be managed by its controller.
The MOTION line burners are designed for demanding conditions such as continuous industrial and
manufacturing operations, constantly changing pellet quality, including the use of various
alternative additives to the raw material it is made from. MOTION lines burners are characterized
by a unique grate design made of highly durable high chromium cast iron alloy providing
extraordinary durability and resistance to the aggressive environment of high temperatures and
fumes. Its design allows for constant, smooth cleaning of the furnace during operation. This design
makes the burner ideal for continuous operation under constant high loads.
2.1. Technologies employed
The innovative MOTION lines represents a range of equipment with a multi-stage, movable
grate. It is the very essence of the best technologies and materials used in the previous designs of
the brand. The combination of proven and reliable mechanisms used in low-power burners with
super-strong materials used in industrial burners resulted in a design with extremely high operating
culture and compact size.
1. GRATE TYPE AND MATERIAL
 Multi-stage – movable
 InCroX
®
high chromium alloy cast plates
2. GRATE DRIVE AND MOTION
 Synchronous motor with reducer
 No position control
 Sectional, reciprocating motion
 Cleaning during operation
 Main cleaning
CAUTION!
The controller and all associated devices should be
mounted on or around the boiler in areas where they
are not exposed to high temperatures (below 50⁰C).
Electronic devices operating at high temperatures may
be
damaged or not function properly.

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3. REFRACTORIES
 Polyurethane fibre reinforcement
 Dispersed reinforcement made of heat-resistant wire
 High resistance to temperature and mechanical damage
 Modular design and quick installation
4. HYBRID DRIVE
 Combination of blower fan and internal feeder
 Precise metering of fuel and air
 Energy saving
 Additional protection in the form of Hall sensor
5. IGNITER
 Steel 300 W
 Quick flame injection
 Easy replacement
6. SAFETY
 Shut-off flap system at the fuel inlet
 Flexible feed tube - if the flame backs up, it melts to prevent fuel from entering the
burner
 Overpressure combustion technology
 Burner temperature sensor
 Fan rotation and internal feeder control system
 External feeder malfunction indication
 Mechanics and electronics located away from the high temperature zone
7. FUELS
 Wood pellets Ø 6-8 mm
 Industrial pellets Ø 6-8 mm
 Agricultural pellets Ø 6-8 mm
8. MAINTENANCE AND SERVICE
 Easy to remove refractories to provide access to the entire grate
 Grate plate quick removal system
 Quick and easy access to all mechanical components with the casing removed
9. CONTROL
 Wide range of heating system configuration options
 Remote control
 Infinite (electronic) burner power control
 Fully compatible with oil and gas boiler and bakery oven automatic control systems
 Expandable with additional heating circuits
 Ability to operate in ON / OFF mode using a thermostat
 Can be configured for use in industrial applications
All the above systems that we used in the M-series burner add up to high reliability,
which is characterized by:
 Automatic start after power failure with last settings memory
 Furnace made of the highest quality high chromium alloy
 Automatic operation: firing up, cleaning, flame control
 Low CO and CO₂ emissions.
 Low electricity consumption
 High durability of refractory parts
 High combustion efficiency - up to 99%
 Flame sensor, precisely detecting the flame level
 Compatible with the automation of oil and gas boiler and baking oven
 Ability to operate a draft fan (exhaust system works cyclically, does not cool the boiler).

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2.2. Design of M50, M70, M100, M130 burners
Fig. 1. Design of M50, M70, M100, M130 burners.
Burner is composed of the following sub-assemblies:
 Combustion chamber – the combustion chamber includes a multi-stage furnace (1) made of
the highest quality high-chromium alloy and a furnace casing part made of two-part
refractory (2);
 Blowing assembly – consisting of a steel housing (3) and an X.Board electrical socket (4)
located on the right side of the burner, into which the plug of the controller cable is plugged;
 Blowing chamber – (5) located between the blowing assembly and the combustion chamber.
In the upper part of the chamber there is a fuel feeding chimney with a barrier and
counterweight (6) to which a polyurethane pipe connected to the fuel feeder is screwed;
 All mechanical and electronic components of the burner are located under the steel
housing (3).
The burner housing has no protruding, sharp parts and does not pose a risk to human health.
The temperature of the housing when the burner is in operation should not exceed 60ºC, unless
the device is operated at elevated temperatures, such as in a bakery.
CAUTION!
The manufacturer reserves the right to make exclusive
changes to the design of the burner and feeder, its
software and wiring, otherwise the manufacturer will
be released from any liability to the purchaser.

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2.3. Pellet quality requirements
The following table contains the individual requirements for fuel (pellet) quality. The use of
fuel certified to DIN 51731 or DIN PLUS, or fuel that meets the EN-14961-2 standard, will extend
the trouble-free operation of the burner. The storage place for pellets should be dry and airy, it is
important that the pellets are at boiler room temperature before being put into the tank.
Table 1. Pellet quality requirements.
Wood pellets
Units
CERTIFICATE
Quality criteria DIN plus DIN 51731
Diameter mm 4≤d<10(6) 4≤d<10(6)
Length mm 5 x D(3) <50
Density kg/dm³ 1.12 1.0<density<1.4>
Ash % <0.5(1);(7) <1.50
Moisture content % <10 <12
Moisture content on delivery % not determined not determined
Calorific value MJ/kg >18(1) 17.5<HW<19.5(2)
Sulphur % <0.04(1) <0.08
Nitrogen % <0.3(1) <0.3
Chlorine % <0.02(1) <0.03
Fines % <2.3 -
Pressing additives % <2(8) (4)
Ash melting point - not determined not determined
Arsenic mg/kg <0.08 <0.08
Lead mg/kg <10 <10
Cadmium mg/kg <0.5 <0.5
Chromium mg/kg <8 <8
Copper mg/kg <5 <5
Mercury mg/kg <0.05 <0.05
Zinc mg/kg <100 <100
Halides mg/kg <3 <3
(1) of dry mass
(2) Free from water and ash
(3) Not more than 20% of the pellets can be up to 7.5 x diameter in length
(4) DIN prohibits the use of additives. This ban is not valid for small heating systems.
(5) In the manufacture’s warehouse
(6) Tolerance in diameter differences ± 10 %
(7) An ash content of up to 0.8% may be allowed if it is naturally higher, specific to the wood
species in question.
(8) Only natural biomass additives are allowed

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2.4. Burner data plate example
Fig. 2. Example of burner data plate.
The plate is located on the side of the burner housing. In accordance with the current
warranty terms and conditions, only burners commissioned by an authorized service confirmed by
an entry in the warranty book will be covered by the manufacturer's warranty. Service actions on
burners without original documentation, i.e. warranty book, identical with the nameplate will be
carried out only against payment.
Details of the warranty conditions are provided in the burner warranty book.
ATTENTION!
Changing the diameter of the pellets during the use of
the burner (for example, from Ø6 to Ø8), requires that
the external feeder calibration procedure be repeated.
This process should be repeated each time the pellets
are changed (change of type, diameter or
manufacturer). A detailed description of the procedure
can be found in section. 5.2 (see page 23).

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2.5. Burner specifications
Table 2. Specifications of M50, M70, M100, M130 burners.
Type M50 M70 M100 M130
Power 10 - 50 kW 20 - 70 kW 30 - 100 kW 40 - 130 kW
Power supply 230 V AC / 50Hz 230 V AC / 50Hz 230 V AC / 50Hz 230 V AC / 50Hz
Maximum power
consumption during firing 355 W 390 W 390 W 480 W
Maximum power
consumption
during operation 50 W 85 W 85 W 85 W
Weight 30 kg 31 kg 35 kg 39 kg
Noise emissions 63 dB 63 dB 63 dB 63 dB
Feeder length 2 m 2 m 2 m 2 m
Fuel types
pellet Ø 6-8mm pellet Ø 6-8mm pellet Ø 6-8mm pellet Ø 6-8mm
alternative fuels* alternative fuels* alternative fuels* alternative fuels*
dry stone dry stone dry stone dry stone
Combustion efficiency up to 99 % up to 99 % up to 99 % up to 99 %
Boiler efficiency up to 96 % up to 96 % up to 96 % up to 96 %
Power adjustment YES YES YES YES
Oxygen sensor YES (option) YES (option) YES (option) YES (option)
Hot water pump control YES YES YES YES
Domestic hot water pump
control YES YES YES YES
Mixer control YES YES YES YES
Buffer control YES (option) YES (option) YES (option) YES (option)
Additional feeder (silo)
control YES (option) YES (option) YES (option) YES (option)
Room temp. control YES (option) YES (option) YES (option) YES (option)
Return line temp. sensor YES (option) YES (option) YES (option) YES (option)
Exhaust gas temperature
sensor YES (option) YES (option) YES (option) YES (option)
Weather control YES (option) YES (option) YES (option) YES (option)
* Use of alternative fuel (not certified wooden pellet) can cause variety of problems, loss of power or
lack of effectiveness. When alternative fuels has been burned (oats, sunflower pellets or other agropellets)
please be aware of high content of ashes that force users to clean the burner and boiler more frequently.
Please make sure that all alternative fuels used are not exceeding 15% of the moisture.
Each time the fuel has been changed please proceed with outside feeder calibration procedure in
section 5.2 (see page 23). When the calibration has been executed, please insert correct value into
the controller.

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The burners of the MOTION BurnPell line feature a simple and consistent design, characterized by
easy installation in the boiler door. Below are the overall dimensions, as well as drawings of the
mounting holes for each type of burner.
Table 3.
Dimensions of M50, M70, M100, M130 burners.
Burner
type Dimensions Drawing of mounting holes
M50 A – 187
B – 224
C – 197
D – 234
E – 296
F – 72
M70 A – 187
B – 224
C – 197
D – 234
E – 296
F – 72
M100 A – 229
B – 224
C – 239
D – 234
E – 296
F – 114
M130 A – 267
B – 228
C – 277
D – 238
E – 203
F – 156

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2.6. Burner safety systems
Burners of the MOTION BurnPell line are equipped with the following safety systems, which
effectively protect the user from flashbacks:
1. Burner temperature sensor
When the sensor detects a temperature above 90ºC, it switches from operating mode to
extinguishing mode, and turns off the external feeder and sets the fan to 100% blowing
power. The alarm temperature setting can be modified depending on the conditions, in which
the device is to work, e.g. in baking ovens or drying rooms. It should be mentioned that
such changes can be made only by qualified and authorized service personnel.
2. Overpressure combustion technology
Overpressure combustion is based on a physical phenomenon created in the burner's
internal feeder. Air is supplied centrally to the combustion chamber which results in
increased flame swirl and reduces the risk of flashback.
3. Fuel feeding chimney with barrier and counterbalance
Feeding chimney, equipped with a steel damping flap with a counterbalance. In the event of
a flashback, the barrier closes the fuel inlet hole and at the same time prevents the fire from
entering the fuel tank.
It is important that the counterweight is not blocked in any way.
4. Flexible feeding pipe
The flexible feed pipe is a flexible connector between the external feeder and the burner
itself. Its main task is to deliver fuel to the burner., in addition, it also serves as a protection
against flashback. Under the influence of high temperatures, the tube will begin to deform
and expand to prevent the supply of fuel to the burner.
2.7. STB protection
If the furnace or boiler is not equipped with its own STB protection, a mechanical
temperature fuse is added to the kit. The capillary sensor should be permanently installed in the
boiler's water jacket. When the critical boiler temperature (95ºC) is exceeded, the fuel feeder is cut
off. In order to restart the burner, the cause of the shutdown caused by overheating of the boiler
should be checked, evaluated, and appropriate measures should be taken to remove the cause.
Then reset the circuit breaker on the housing. Reset the fuse only after the reduction of the boiler
shell temperature to a safe level.
2.8. Boiler temperature sensor
The burner is supplied together with a boiler temperature sensor. Its task is to control the
temperature of water in the heating boiler. The sensor should be installed according to the boiler
manufacturer's recommendations. Usually, such a place is a recessed sleeve that ensures proper
reading of the boiler water temperature. Ensure that the sensor is installed in a way that prevents
it from slipping out of the recessed sleeve. If the burner is operated in a boiler with an improperly
positioned boiler temperature sensor, there is a risk of overheating. According to the boiler
temperature sensor, the controller controls the operation of the fuel and air feeding system by
increasing and decreasing its output in relation to the heat output demand. The sensor is also the
main protection against boiler overheating.
Not applicable to burners designed for baking ovens.
For inspection of safety systems, see section 6.2 Specification of inspection intervals.

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2.9. Controller specifications, description of functions and burner settings
All safety conditions regarding the methods of connection to the mains, wiring diagrams of
the controller board, description of functionality and methods of operation are described in the
manual of the controller supplied with each BurnPell burner. Meeting all the requirements for the
controller connection ensures safe operation of the burner. Keep in mind that the controller controls
the operation of the heating system in a defined manner (described in the controller's manual), this
triggers the need to follow the recommendations for dedicated hydraulic diagrams presented,
together with the description, in the controller's manual.
The use of hydraulic solutions inconsistent with those suggested by the manufacturer of the
controller may cause difficulties in the proper functioning of the heating systems.
3. INSTALLATION
3.1. Stack
The parameters of the chimney should be adapted to the requirements of the heating
appliance in which the burner is to be installed. The stack can be made of ceramic or steel; it should
be clean and its draught should be sufficient for the BurnPell burner operating with the heating
appliance within the set power range. In case of inadequate draught, it is necessary to install a
mechanical fume extractor. Before operation, the chimney should be inspected and approved by an
authorized chimney sweep.
Note that a tall stack with high flue gas throughput needs more heat and the internal temperature
of the stack should not be less than 80ºC 1m below the top to avoid condensation at the top of the
stack. In order to reduce the internal cross section of the chimney, a steel pipe of appropriate
diameter can be installed. Any advice on the flue should be sought from a chimney sweep company.
Strong winds, excessively high or excessively low chimney affect the efficiency of the burner and
its setting. It is recommended in such cases to install a stack draught stabilizer to ventilate the
stack and help adjust the flow. If the stack is too small, the burner may not work properly. In such
a case, it is necessary to install a mechanical fume extractor.
Table 4. Minimum stack draught.
BURNER TYPE MINIMUM STACK DRAUGHT [Pa]
M50 25
M70 25
M100 30
M130 30
The value of the minimum stack draft should be determined when the stack is cold.
ATTENTION!
The manufacturer of the burner is not responsible for
incorrect installation, improper configuration of the
controller settings that determine the operation of the
fittings in the heating system.

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Fig. 3. Location of burner with respect to the direction of the flame.
In the room where the burner is operated, it is necessary to ensure an adequate supply of fresh
air, as well as exhaust ventilation. The air supply (air grille) should be located at the floor, while
the exhaust ventilation grille should be located under the ceiling of the room.
A high risk of carbon monoxide poisoning occurs when the boiler is located in a room with an
inadequate supply of fresh air.
3.2. Boiler / oven
MOTION BurnPell line burners with a power of 50-130 kW can be installed in most boilers.
The power of the burner must be selected by the installer depending on the power of the boiler or
oven. It is recommended to install the burner in the boiler door, using four M8 screws (dimensions
shown in Table 3). If the boiler chamber is too small, the burner may work incorrectly.
Strictly comply with the recommendations for the minimum required distances from the interior
walls of the boiler. Distances specific to MOTION lines burners are shown in Tables 5, 6 and 7.
If the burner is located in a chamber whose walls are too close to the working part of the burner,
they may cause excessive heat load on the burner. This may lead to faster wear of components
working at high temperatures and can also lead to heat radiation to mechanical and electronic
components. A burner that does not have the proper boiler chamber volume required for its power
may generate unstable levels of waste gas emissions, as well as will not provide the expected heat
flux transferred to the receiver (oven/boiler).
Following the installation recommendations is a guarantee of proper burner operation.
Table 5. Minimum dimensions of the furnace chamber.
BURNER TYPE
MINIMUM DIMENSIONS OF THE FURNACE CHAMBER
MIN. VOLUME OF THE
FURNACE CHAMBER [m
3
]
MIN. LENGTH OF THE
FURNACE CHAMBER L [mm]
M50 0,040 550
M70 0,070 790
M100 0,099 790
M130 0,114 950

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Table 6. Examples of minimum dimensions of a rectangular furnace chamber.
BURNER TYPE
EXAMPLES OF MINIMUM DIMENSIONS OF A RECTANGULAR
FURNACE CHAMBER
WIDTH
A [mm]
HEIGHT
H [mm]
LENGTH
L [mm]
M50 324 388 550
M70 324 388 790
M100 324 388 790
M130 324 388 950
Table 7. Examples of minimum dimensions of a cylindrical furnace chamber.
BURNER TYPE
EXAMPLES OF MINIMUM DIMENSIONS OF A CYLINDRICAL
FURNACE CHAMBER.
MIN. CHAMBER DIAMETER
D [mm]
MIN. LENGTH OF THE
FURNACE CHAMBER
L [mm]
M50 400 550
M70 400 790
M100 400 790
M130 400 950
Table 8. Pressure values in the combustion chamber.
BURNER TYPE PRESSURES IN THE COMBUSTION CHAMBER [Pa]
M50 25
M70 25
M100 25
M130 30
3.3. Fuel hopper
The fuel hopper can be made of any non-flammable material, such as steel sheet of any
capacity, and should be located at an appropriate distance from the burner (Figure 7). A spiral
feeder in a casing pipe is mounted to the fuel hopper in its lower part. The inclination of the feeder
should not be more than 45º to the ground. The hopper must be covered from the top with a lid.
Any manipulation on the bottom of the hopper during feeder operation is forbidden, as it poses a
risk of injury to the body - fingers of the hand. Remember to refill the hopper with pellet fuel before
starting the burner. Do not fill the hopper with damp or decaying fuel. This may cause difficulties
in burner operation by blocking the feeder.
Please note that there should be sufficient space around the pellet hopper to perform service work
on the external feeder, or to empty the feeder of pellets using the cleanout at the bottom of the
feeder.

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3.4. Screw feeders
Table 9. Feeder types.
M50 M70 M100 M130
TYPE 1 TYPE 1 TYPE 1 TYPE 2
3.4.1. Screw feeder, type 1
Fig. 4. Type 1 feeder design.
The fuel feeder connects the fuel hopper to the burner. It is made of galvanized steel pipes
(1) (2) with a diameter of 60.3 mm. Inside the tube is a steel spiral (5) driven by a 230V AC electric
motor with gearbox (9). The motor is connected via a power cord to a suitable socket located on
the burner controller. The lower part of the feeder is mounted in the lower part of the fuel hopper
and the upper part is connected to the burner with a flexible polyurethane pipe (14).

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Feeder installation diagram (Fig. 4):
1. Connect the two pipes (1) and (2) using M8 bolt (3) and M8 nut with washers (4);
2. Place the mandrel (6) in the shaft hole (8), then screw the spiral (5) onto the mandrel
(6) and tighten with the M8 nut (7);
3. Put the feeder cap (10) on the motor spindle (9);
4. Slide the shaft (8), together with the screwed spiral, onto the motor spindle (9) and
secure with the set screw (11);
5. Slide the spiral (5) inside the pipes. Use bolts (12) and nuts (13) to screw the motor (9)
to the pipe flange.
3.4.2. Screw feeder, type 2
Fig. 5. Type 2 feeder design.
The fuel feeder connects the fuel hopper to the burner. It is made of three galvanized steel
pipes (1, 2, 3) with diameters of 76.1 mm each. Inside the tube is a steel spiral (4) driven by a
230V AC electric motor (5) coupled to a gearbox (6). The motor is connected via a power cord to
a suitable socket located in the burner control cabinet (see the electrical diagram). The lower part
of the feeder is mounted in the lower part of the fuel hopper and the upper part is connected to the
burner with a flexible polyurethane pipe (13).

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Feeder installation diagram (Fig. 5):
1. Connect the three pipes (1), (2) and 3) using connectors (7) and tighten the fixing
screws.
2. Place the mandrel (8) in the shaft hole (9), then screw the spiral (4) onto the mandrel
(8) and tighten with the M12 nut with a washer (10);
3. Place the keyway (15) in the groove of the shaft (9). Slide the shaft into the hole in the
gearbox (6), and then tighten the M8 bolt with washers (14) to the repositioned shaft;
4. Slide the spiral into the pipe. Use M8x80 bolts (11) and M8 nuts with washers (12) to
screw the gears (6) to the pipe flange.
NOTE: The end of the feeder spiral should be in 2/3 of the length inlet opening (Fig. 6).
If the spiral is too long, cut it to the required length.
3.5. Feeder setting
Fig. 6. Feeder spiral installation.
Fuel dosing is performed automatically. Feeder operation is cyclic and controlled by the
burner controller. The feeder must be set at an angle (maximum 45
º
) to the ground. The flexible
anti-static polyurethane pipe must be moved away from the burner axis by a minimum of 30 cm.
If the pipe overheats (flashback) and melts, pellets will not pour into the burner. Lack of fuel will
cause the burner to go out. This prevents the fire from spreading to the fuel hopper and starting
a fire in the boiler room.
NOTE: Before starting the burner, fill the hopper with pellets and fill the feeder until the
pellets begin to fall into the burner.
4. INSTALLATION OF BURNER AND FEEDER
The burner and feeder are delivered ready for installation. The kit is packed in a cardboard
box which should be transported according to the markings. The set is intended for self-assembly.
ATTENTION!
Disconnect all power to the boiler and burner before
installation or removal.