Mareli Systems SMB 50 User manual

SMB 50 ROTARY Pellet burner
Assembly and exploitation manual
Mareli Systems

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Mareli Systems
• “Mareli Systems” expresses its gratitude towards the clients who purchased the manufactured products.
• “Mareli Systems” provides the present manual as an aid to the team, which will install, adjust and main-
tain the device, as well as to the client which will exploit it.
• “Mareli Systems” requires that the technicians who will carry out the above mentioned procedures have
passed a training course on the activities, associated with this product.
ATTENTION! For Your safety, it’s necessary to read carefully this manual as well as the exploitation and instal-
lation manual of the automated pellet burner before attempting any installation, adjustment and exploitation
activities. Also read the installation and exploitation manual of the pellet bunker if the device is provided with
one. e non-fulllment of prescriptions and violation of active regulations and directives may lead to damage
and unexpected consequences for which “Mareli Systems” accepts no responsibility.
Do not discharge into garbage container!!!
is sign on the burner means that the product must be disposed of only in an a specially designated for
that purpose space for the collection and recycling of waste. Disposal of this device falls under the regulation
of the Directive on waste of electrical and electronic equipment (EEE) of the European Union. Dear custom-
ers, let us contribute to the preservation of the environment!
• is appliance is not intended for use by persons (including children) with limited physical, sensory or
mental abilities or lack of experience and knowledge. e installation must be performed by a qualied
expert in the eld of heating installations or authorized by “Marelli Systems’ service. e place and way
of connecting the product should be selected carefully in accord with the safety instructions. Install
away from ammable objects!
• Never try to make changes to the torch! It is forbidden to use ammable liquids for ignition! Servicing
the burner decorating your done by an adult who is familiar with the operating conditions!
• Introduction of inammable liquids in room with a working burner is strictly prohibited!
• Children should not be le unattended in the room where the product is installed!
• Safe distances: When installing the product a safe distance of at least 200 mm must be respected. is
distance applies to the product located near materials of B or C ammability level. e safe distance is
doubled if the product is close to materials of C3 combustion level.
1. Description and advantages of pellet burner “SMB 50 Rotary”
Pellet burners of this series are designed to utilize wood pellets. It has a welded steel construction. e result-
ing heat is absorbed by the heat exchange surface of the boiler body and transmitted in the heating system.
ese boilers used for heating in local heating systems, but also for heating domestic water.
Automated pellet burner is part of the system and can utilize the following types of fuel: Wood pellets size 6
and 8 mm Class A;
e kit comprises: pellet burner equipped with a control panel;
Advantages of the product:
• Designed to utilize pellets, making it cleaner for the environment;
• Product is highly automated and can be used in systems with programmable room thermostat ensuring
maximum thermal comfort and fuel economy;
• Eciency;
• Low emissions;
• Compact design allowing for simple installation and easy maintenance and cleaning;
• Opportunity for domestic hot water (DHW);
• Minimal operating costs;
Basic information of pellet burner:
• e pellet burner is mounted horizontally secured by M8 screws.
• e pellet burner is an independent module that can be mounted on already installed boilers making it
compatible with wood pellets as a fuel source.
• e burner is equipped with a control panel.
• Wood pellets allow easy automation of the process of combustion and give high eciency. However, the
wood pellets and any other solid fuel also create ash as a bi-product, but its amount is less than what
remains from rewood or coal.

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e pellet burner is a compact modular design with integrated elec-
tronic control unit, consisting of the following components:
1. Combustion chamber made of high quality stainless steel;
2. Grill in the combustion chamber that is easily removed and al-
lows for easy ash removal;
3. Air duct, which ensures an even supply of air for combustion and
cooling elements of the burner;
4. Electric heater, which ignites the fuel, positioned beneath the in-
clined portion of the combustion chamber;
5. Fan, equipped with a voltage regulation;
6. Photo-sensor, which monitors the combustion process and ap-
plies a corresponding program;
7. Emergency temperature sensor to extinguish the burner in case
of “Backre” in the pipe of the unit;
8. Controller, which monitors and controls the burner and indicates
its mode of operation;
9. Connector auger, which realizes the power of the auger;
10. Interface panel equipped with indicator lights;
Electrically powered auger that transports fuel to the burner depending on the operating mode of the burner.
e screw consists of a compact geared motor with a built-in protection against overheating tube which trans-
ports fuel until it reaches the hole through which is supplied to the exible tube.
End view of the system for pellet burner auger
• e installation must be performed by a qualied expert in the eld of heating systems. e place
and way of connecting the burner must be chosen carefully, follow the safety instructions!!!
• Never try to make changes to the burner! It is forbidden to use ammable liquids for ignition! Main-
tenance should be done by an adult who is familiar with the operating conditions! Introduction of
inammable liquids in room with a working burner is strictly prohibited! Children should not be
le unattended in the room where the product is installed!
2. Measures to improve safety
• e burner is controlled by a microprocessor.
• e process of ignition is monitored by a photo sensor, if there is no ignite the rst time, the micropro-
cessor feeds a second dose of pellets and ignition starts again. If aer 2 attempts ignition does not take
place burner goes into error mode.
• If the hopper has no more pellets, the burner will not ignite.
• If during operation temperature sensor detects a temperature higher than 90 ° C, the auger conveyor
stops and the burner is turned o (goes into error).
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3. Connection (installation) to the boiler:
e pellet burner can be attached to a steel or cast-iron boiler with power from 10 to 50kW. e minimum
depth of the combustion chamber should be 450 mm. Pellet burner without secondary air supply.
• Distance between the ame and the cooling surface of the boiler 150mm.
• e unit is located so that there is enough space for cleaning, removing ash from the burner, boiler and
exhaust pipes.
• Putting objects on the unit is forbidden, so as not to break the seal. ere is a danger of breaking and
violating the integrity of the burner.
• e opening for installation of the burner must have a diameter 167 mm. e size of the door, to be
joined must allow for the incision of the above-described mounting hole (if there is none).
• e burner is installed in the boiler door with the corresponding seal. Secured tightly with screws M8.
e relationship between the burner and boiler should be well sealed in order not to get gas leaks into the
room. When installing the equipment is in optimal horizontal position and the inlet hose pellets should
be straight and clamps must be properly tightened.
Burner Flange
647,00
285,50
105,00
42,00
200,00
167,00
62,00
60,30

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Appendix 1
Reconstruction of hot water boiler with automated burner
• Cut a hole in the available door (if there is no such planned). e sizes described in the instructions
should be respected.
• oroughly clean the interior walls of the boiler from ash residue, soot, etc., which would have led to
appearance of thermal resistance during operation. Aer cleaning, the drawer for collection of the ash
from the combustion chamber must also be taken out.
• en, mount and securely attach a pellet burner to the door through M8 screws
Explanation: It must be checked whether sealing ropes of the doors t snugly to the boiler housing. If any
gaps are found, the corresponding sealing rope must be replaced and ensure the density of this zone;
• Install the fuel supply conveyor, which feeds the automated pellet burner.
• Install the fuel transport auger that feeds the pellet burner.
e fuel supply conveyor must be installed in such a way so that fuel can be freely extracted from the hopper
– from its lowest point. In the event that the hopper is made/assembled on site, it is recommended to make
a manhole for servicing the rowing area of the screw conveyor. e screw conveyor pipe itself also must be
fastened, so as to ensure against upheaval and possible change of the screw conveyor axis angle against the
horizontal plane.
Explanation: e tilt angle (between the screw conveyor axis and the horizontal plane) of the screw conveyor
has a direct eect on its performance, i.e. the fuel ow which it will provide at a specied operating mode.
at is why adjustment of the burner settings is likely to be required upon change of this angle, in order to
insure specic heating power.
Power supply is provided through a Shockproof type plug directly in the mains.
CAUTION! e burner control unit should be plugged into an outlet, which must be earthed.
ere is a risk of electric shock in the absence of earthed plug! e manufacturer bears no
responsibility!
Pellets are stored in a hopper. Mareli hoppers have a 45-degree tilt. e screw conveyor pipe must be placed
therein. e Screw conveyor draws pellets from the hopper and feeds the burner through a exible connection.
Dosing is controlled by the control unit by changing the operating time of the screw conveyor. e initial load-
ing of the screw conveyor with pellets (lling the screw conveyor pipe) is carried out when the screw conveyor
plug is connected to a normal 230V/50Hz outlet. As pellets start to fall through the exible connection, the
plug is shied to the burner.
Important: For ensuring normal operation of the burner a minimum of 20 Pa chimney draught is required.
Aer starting the burner, wait for about 3 hours for the chimney to be warmed up and measure the draught.
Install additional chimney fan (controlled by the control unit of the burner) if necessary.
!
4. Maintenance and operation of the pellet burner
Requirements for the characteristics of the fuel, which is used for operation of a pellet burner SMB 50
Rotary.e following table shows the requirements for the types of wood pellets utilized in automated pellet
burner.
Table 1
e following table shows classication of wood pel-
lets depending on their physical parameters - accord-
ing to an evaluation methodology applied by Mareli
Systems:
Table 2
Ad - ash content in dry mass
DU - Mechanical resistance
Pellets are stored in a pellet hopper at a dry and
ventilated place.

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Appendix 2
Technical data
Power output min. / max. kW 10 - 50
Power consumption (electrical) W 60 - 350
Feeder mm 1400 / 63
Min. Chimney dra Pa 20
Weight Kg 35
Fuel Pellet F6 - F8
Noise level dB 56 +/- 3 dB
Electric power supply V / Hz 230 / 50
Working environment temperature C 5 - 40
Humidity level, working range 30 C % 85
160,00
140,00
М8
212,60

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277,00
200,00

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13
1415
17
16
1
2
3
4
5 6
7
8
9
10
11
12

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1Top burner cover 15 Always on auger motor
2Display Interface 16 Photo-sensor
3Burner housing 17 Main control-board
4Combustion fan 18 High buer sensor
5Return ame sensor 19 Low buer sensor
6Motor rotary mechanism 20 Room ermostat
7Burner handles 21 DHW Sensor
8Side burner cover 22 Pellet boiler temperature sensor
9Rotary combustion chamber 23 On / O switch
10 Top isolation cover 24 Main pellet feeding auger motor
11 Bottom isolation cover 25 DHW Pump
12 Outer combustion chamber tube 26 Circulation Pump
13 Component connection cover 27 RJ 45 service connector
14 Pellets feeding inlet pipe
18 19 20 21 22
23
242526
27

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e joint operation of the system which the automated pellet burner applies to / depends on:
• Heat output to which the burner is set;
• e heating surfaces of the heater, for which it is intended.
• e seal degree of the door and covers of the combustion chamber (condition of sealing ropes);
• Chimney draught;
Good chimney draught is essential for proper functioning of the heating system. Boiler capacity and econom-
ical operation depend largely on it.
Attention: Suocation hazard due to lack of oxygen in the installation room.
• Ensure sucient fresh air supply through holes out.
• Risk of injury/damage to equipment due to lack of combustion air can lead to tar and
noxious gas formation.
• Ensure sucient fresh air supply through holes out.
• Notify the user of the installation that these holes must remain open.
NOTES:
When using the circulation pump for the transmission of heat energy from the hot water boiler to the heating
system,d it is not recommended that the return („cold “) water’s temperature is lower than 60oC. A local (in
the heat exchanger of the boiler) over-cooling of ue gases and condensing water vapour is possible, which is
one of the end products of fuel combustion.
Why is regular maintenance important?
Heating systems should be maintained on a regular basis for the following reasons:
• To maintain high eciency and to operate the heating system economically (with low fuel consumption);
• Achieving high safety of operation;
• Achieving high environment-friendly combustion;
5. Pellet burner cleaning
e appliance must be cleaned regularly for long and good operation of the pellet burner. Cleaning is done
when the burner is stopped and switched o from the mains. e more quality the pellets used, the longer the
intervals between cleaning will be.
Boiler: Clean the ashes from the boiler with a brush and remove the soot.
Pellet hopper: Clean the pellet hopper periodically. When using lower quality pellets, they generate ash, which
accumulates on the hopper base and impedes the passage of the pellets.
!

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Additional instructions:
1. Remove the ash and slag from the boiler once a week or according to the volume of ashtray.
2. Check boiler ues periodically and clean them if there is congestion.
3. Check the burner adjustment once a year using a gas analyser.
4. Clean ash at the pellet hopper bottom when it is necessary.
5. Clean boiler chimney once every two years.
6. If there is law draught in the chimney, install additional chimney suction fan. Its control is planned and
integrated in the control unit of the burner.
Open the handles to free the burner
from the mounting ange.
e mounting ange remains con-
nected to the combustion chamber
door of the boiler.
To remove the inner combustion
chamber turn the cylinder coun-
ter-clockwise.
e maintenance timetable is recommended, cleaning must be made whenever necessary.
e need of cleaning varies individually, since the choice of pellets, the system itself, and the settings of the
burner aect the frequency of cleaning. Unforeseen risks upon cleaning and maintenance.
Hand burn hazard: Possible reason – high temperature in the burning chamber. is risk exists in case of
unburned fuel pellet, as well as not cooled burner when cleaning by the user!
It may occur upon cleaning and maintenance of the burner. e use of special protective equipment (gloves)
is recommended!
Electrical shock hazard: e maintenance of the burner during operation as well as under voltage is pro-
hibited! If a short circuit or possible damage occurs, an authorised technician should be called. Touching the
conducting parts is prohibited!
Dust in eye hazard: May occur during work both upon cleaning and maintenance. e use of special protec-
tive equipment (safety goggles, tightly tted) is recommended!
CAUTION: Periodic cleaning, as well as supervision of the burner will prevent any incidents
caused by faulty pellet fuel, incorrect slopes of burner and of screw conveyor, as well as in-
correct combustion settings. Read this manual before installing and working with the burner.
e manufacturer bears no responsibility!
!

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A burner with properly adjusted settings operates well and cost-eciently. If there are problems, please, con-
tact the supplier for the removal of any defects or for setting up the burner.
POSSIBLE FAULTS AND TROUBLESHOOTING:
e verication shall be carried out only by a qualied electrical technician or an authorized by Mareli Systems
service centre.
e unit does not work:
• Check the hopper for sucient quantity of pellets.
• Check operation of the igniter.
• Check operation of the screw conveyor (whether it feeds pellets). Check the exible connection. e
facility does not start: (display is not illuminated).
• Check fuses on the circuit board.
• Check the power source for loose connections.
It is important that faulty parts are replaced immediately !!!
Always keep in stock additional photo sensor and heater for replacement.
At the end of the period, upon decommissioning the burner, clean the fuel surfaces from any deposits. Clean
the screw conveyor and the hopper from residual sawdust. Cut o the burner power supply.
Additional information:
1. Cables of the thermal sensors can be extended up to 10 m.
2. Installation of the thermal sensors should be done with immersion sleeves or applied under insulation
pipes.
3. Sensors are part of the controller. Do not replace them with others.
4. Indoor thermostats with relay output must be used.
5. e required chimney draught is at least 20 Pa. Install additional chimney fan (controlled by the control
unit of the burner) if the values are lower.
6. When wiring pumps or a chimney fan, the wiring inputs in the housing of the burner must be used. If
there is a shortage of inputs, additional inputs must be installed.
7. e time for pellet loading before ignition - must be sucient so that the fallen pellets. Cover the holes
in the combustion basin.
8. If there is no additional chimney fan, smoke leakage is possible through the seals on the boiler doors.
e smoke usually disappears during normal operation.
9. To achieve the desired output of the burner, do the following:
• Start the burner and go to manual loading option in the user menu.
• Disconnect the exible connection from the burner and collect the pellets passed from the
conveyor into a bag for 10 min.
• Weigh the pellets passed and multiply by the factor 0.03.
• e calculated value is the power in KW/h.
• Example: If the screw conveyor passes 1,300 g pellets for 10 min. 1,300x0.03 = 39 Kw - heat-
ing power.
Instructions for installer and service technician:
Screw conveyor installation:
Install the screw conveyor at an angle of 45 0into the pellet hopper.
Fill the hopper and plug the screw conveyor to 230V/ 50Hz. Wait for the screw conveyor pipe to be lled with
pellets and switch the plug to the burner. In order to ensure the normal free-fall of the pellets from the screw
conveyor to the burner, the exible connection must be well tensioned and the dierence in levels between the
screw conveyor outlet and the burner input shall be at least 40 cm.
Parameter adjustment:
e fuel process of the burner depends on several parameters. Fan speed (V), time for feeding pellets from the
screw conveyor (s), time for the rest of the screw conveyor (s). ese parameters are adjusted separately for the
ve degrees of power. e degrees are upstream. It is not recommended that the power of the rst or second
degree is greater than the power of third, fourth, and h. For the recommended settings, please refer to the
manual for programming the controller of the pellet combustion system.

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If the unit does not operate satisfactorily:
• Check the quality of pellets (must be free from dust). Upon normal operation of the burner, the quantity
of the pellets on the grate (combustion basin) must be such so that its holes are covered.
e criterion for good operation of the burner is the colour of the ame - IT MUST BE YELLOW. When it is
dark red, mixed with smoke it is most likely that the volume of input air is less than required for good com-
bustion and must be increased.
Adjustment of the air aects essentially the combustion mode, the aim must be a calm, stable combustion,
without residue.
Sometimes, if the initial loading dose for ignition is large, “choking” of the burner may occur, i.e. it may not
ignite and upon re-activation of the ignition (second attempt) the basin may clog up with pellets. e volume
of the rst dose must be decreased so as to avoid choking.
NOTE: It is desirable when adjusting the burner settings to use exhaust gas analyser.
IMPORTANT:
Default values of the parameters should not be taken for granted. e settings must be adjusted individually
according to REQUIRED POWER, TILT OF THE SCREW CONVEYOR, QUALITY OF PELLETS, CHIM-
NEY DRAUGHT, CUSTOMER REQUIREMENTS!
Switching o the burner and the boiler
Switching o the automated pellet burner should be done according to the guidelines in its manual. Aer
cooling of the boiler, the burner also should be switched o. It is also recommended that the unit is cleaned
from the accumulated ash.
An emergency stop of burner and boiler
During operation of the automated pellet burner an emergency situation may arise. Some situations of this
kind are recorded by the burner controller and a procedure for their prevention is automatically performed.
e monitoring controller also indicates the burner status. In the event of an accident check the reason for its
occurrence and take appropriate measures for its removal.

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Faults and Troubleshooting
In the presence of a fault in the operation of the burner-boiler system, one should be familiar with the prob-
lems and how to solve them as described in the user manual for operation of steel hot water boiler, as well as
in such for automated pellet burner. In the following table this information is supplemented by data that will
be of assistance to the service technician.
In case of „rst “commissioning of the boiler condensation of water vapour on the heating surfaces of the heat
exchanger may occur. is one-time process does not cause problems in the operation of the unit;
Operation of the automated pellet burner in modes, which exceed its heating power according to its technical
parameters, is not allowed. In the case of exceeded rated thermal power of the automated pellet burner irrev-
ocable deformations may occur in the area of the combustion chamber of the burner, which lead to its failure
– in such cases the factory warranty of the burner is not recognized by the manufacturer.

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EXAMPLE OF MOUNTING OF THE BURNER TO
THE LC SOLID FUEL BOILER
1 2
3 4

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5
6
Fix the burner with the
provided M8 bolts

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S
ESC
SET
P1
P2
P3
P4
P5
P6
P0 50 65 C
RUN MODE
CONTROL PANEL K500 NG21
Main ermostat
Main Temperature
Chrono
Winter / Summer
State
Power
P1 - Exit from menu/submenu rell Function (push for 3 seconds)
P2 - Ignition, extinguishing and errors reset (push for 3 seconds) Enable/Disable Chrono
P3 - Access to User Menu 1/ submenu / Access to user 2 menu (push for 3 seconds) / Save Data
P4 - Access to combustion power / Menu Increase
P5 - Enable chrono time slot /Access to the Info Menu
P6 - Access to Room ermostat / Boiler ermostat / Menu Decrease
G- Daily Chrono on / S- Weekly chrono on / FS - Week End Chrono On
DHW demand or buer tank thermostat not reached
Local room heating target reached
P3 + P5 - Direct access to the Secondary Information menu inside the Service menu. (push for 3 seconds)
USER MENU 1
Power - Pellet Menu to modify the combustion power of the system in Pellet mode. It is possible to set it
in auto or manual mode: in the rst case the system chooses the power combustion, while in the second
one, the user selects the power. On the le of the display the combustion mode is reported (A= automatic
combustion, M=manual combustion) and the system working power.
ermostats
Boiler - Menu to modify the Boiler ermostat value. You can program the minimum and maximum value
by setting the ermostats 26 and 27. With climatic function switched on the thermostat value cannot
be modied, because it is automatically computed by the system.
Buer Tank - Menu that allows to modify the Buer tank ermostat value; it is shown if; it is displayed if a
hydraulic plant requiring it has been selected.
DHW - Menu to edit the DHW thermostat value.
CHRONO
This Manu allows selecting the programming modalities and and the Ignition/Extinguishing time slots.
Disable
Daily
Weekly
Week - End
Modality - It allows selecting the disired modality, or disable all set programming.
1. Enter modication mode through the key P3.
2. Select the chosen modality (Daily, Weekly or Week end).
3. Enable/disable chrono modality through the keys P2.
4. Save the settings through the keys P3.
Programming
The system includes three type of programming: Daily, Weekly, Week end.
After selecting the desired kind of programming:
1. Select the programming time through the keys P4/P6.
2. Enterthe adjustment modality (selected time will be ashing) through the keys P3.
3. Change the time via keys P4/P6.
4. Save the programmong with the keys P3.
5. Enable (a “V” is displayed) or disable the time slot (a “V” is not displayed”) by
pressing the keys P5.
Daily
Select the day of the week to program and set the ignition and extinguishing times.
Programs around midnight
Set the clock On of the previous day at the desired time: Ex. 20.30
Set the clock of OFF of the previous day at: 23:59
Set the clock On of the following day at 00:00
Set the clock of OFF of the following day at the desired time: Ex. 6:30
The system turns on at 20.30 on Tuesday and turns o at 6.30 on Wednesday
Weekly
The programs are the same for all days of the week.
Week-end
Choose between 'Monday-Friday' and 'Saturday-Sunday' and then set the switching
on and o times.
Monday
ON OFF
09:30 11:15 V
00:00 00:00
00:00 00:00
Monday____________
Tuesday
Wednesday
Thrusday
Friday
Mon-Fri
Sat-Sun
USER MENU 2
Menu is accessed by pressing the P3 buttons for 3 seconds .
Settings
Time and Date - Used to set the day, month, year and current time.
Language - Menu to modify the language of the LCD board.
Display Menu
Contrast - Menu used to regulate the display contrast.
Brightness - It allows you to adjust the screen brightness.
Minimum Brightness - Menu used to regulate the lighting of the display when the command aren’t used.
Keyboard Address - This Menu is protected by a password (the password is 1810), that allows you to set the RS485
node address. With the bus 485 it is not possible to have more nodes with the same address.
Sound - It allows you to enable or disable sound from the control panel.
Node List - This menu shows: communication address of the board, typology of the board, rmware code and
rmware version. Data are not modiable. The typologies of board that can appear are:
MSTR - Master; INP - Input; KEYB - Keyboard; OUT - Output;
CMPS - Composite; SENS - Sensor; COM - Communication;
Acoustic Alarm - It allows to enable or disable the acoustic alarm of the keyboard.
Auger Calibration - It allows to modify the value set in rm of Auger’s speed or On times. The values are in the
range – 7 ÷ 7. The rm’s value is 0.
Fan Calibration - It allows to modify the value set in rm of Combustion Fan’s speed. The values are in the range
– 7 ÷ 7. The rm’s value is 0.
Summer-Winter - This Menu allows you to modify the hydraulic plant functioning depending on the season.

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CHRONO
This Manu allows selecting the programming modalities and and the Ignition/Extinguishing time slots.
Disable
Daily
Weekly
Week - End
Modality - It allows selecting the disired modality, or disable all set programming.
1. Enter modication mode through the key P3.
2. Select the chosen modality (Daily, Weekly or Week end).
3. Enable/disable chrono modality through the keys P2.
4. Save the settings through the keys P3.
Programming
The system includes three type of programming: Daily, Weekly, Week end.
After selecting the desired kind of programming:
1. Select the programming time through the keys P4/P6.
2. Enterthe adjustment modality (selected time will be ashing) through the keys P3.
3. Change the time via keys P4/P6.
4. Save the programmong with the keys P3.
5. Enable (a “V” is displayed) or disable the time slot (a “V” is not displayed”) by
pressing the keys P5.
Daily
Select the day of the week to program and set the ignition and extinguishing times.
Programs around midnight
Set the clock On of the previous day at the desired time: Ex. 20.30
Set the clock of OFF of the previous day at: 23:59
Set the clock On of the following day at 00:00
Set the clock of OFF of the following day at the desired time: Ex. 6:30
The system turns on at 20.30 on Tuesday and turns o at 6.30 on Wednesday
Weekly
The programs are the same for all days of the week.
Week-end
Choose between 'Monday-Friday' and 'Saturday-Sunday' and then set the switching
on and o times.
Monday
ON OFF
09:30 11:15 V
00:00 00:00
00:00 00:00
Monday____________
Tuesday
Wednesday
Thrusday
Friday
Mon-Fri
Sat-Sun
USER MENU 2
Menu is accessed by pressing the P3 buttons for 3 seconds .
Settings
Time and Date - Used to set the day, month, year and current time.
Language - Menu to modify the language of the LCD board.
Display Menu
Contrast - Menu used to regulate the display contrast.
Brightness - It allows you to adjust the screen brightness.
Minimum Brightness - Menu used to regulate the lighting of the display when the command aren’t used.
Keyboard Address - This Menu is protected by a password (the password is 1810), that allows you to set the RS485
node address. With the bus 485 it is not possible to have more nodes with the same address.
Sound - It allows you to enable or disable sound from the control panel.
Node List - This menu shows: communication address of the board, typology of the board, rmware code and
rmware version. Data are not modiable. The typologies of board that can appear are:
MSTR - Master; INP - Input; KEYB - Keyboard; OUT - Output;
CMPS - Composite; SENS - Sensor; COM - Communication;
Acoustic Alarm - It allows to enable or disable the acoustic alarm of the keyboard.
Auger Calibration - It allows to modify the value set in rm of Auger’s speed or On times. The values are in the
range – 7 ÷ 7. The rm’s value is 0.
Fan Calibration - It allows to modify the value set in rm of Combustion Fan’s speed. The values are in the range
– 7 ÷ 7. The rm’s value is 0.
Summer-Winter - This Menu allows you to modify the hydraulic plant functioning depending on the season.
USER MENU 2
Settings
Time and Date - It allows you to set day, month, year and current time.
Language - It allows you to modify the language of the keyboard.
Recipe - Menu for the selection of the combustion recipe.
Summer/Winter - Menu to edit the functioning of the hydraulic system according to the season.
Service
Counters - Ignitions (Number of attempted Ignitions) - Failed Ignition (Number of failed ignitions) -
Working hours (Operating hours in Run mode, Modulation and Safety).
Errors List - e menu shows the last 10 errors; in each line the error code and time/date of the error itself
are shown.
Secondary Information - Information about congurable outputs and inputs are only available if they have
been set.
Cleaning Reset - Menu to reset the function ‘System Maintenance 2’. It is displayed only if T67>0.
Auger Calibration - is menu allows you to modify the default values of the Auger speed or its On times.
You can set the values in a range within –7÷7. e default value is 0.
Fan Calibration - is menu allows you to modify the default values of the Combustion Fan speed. You can
set the values in a range within –7÷7. e default value is 0.
Mixer Valve - Menu to manage the Mixer Valve operation.
Automatic Power - is menu allows you to set combustion power in automatic mode only. If you set it,
power change menus are no longer displayed.
Loading - e procedure enables the pellet manual charge and it is automatically interrupted aer 300
seconds. In order to enable this function, the system must be on mode O.
Loading Test - e procedure allows calculating the amount of pellet used in 10 minutes with the auger.
Display
Contrast - It allows you to adjust the screen contrast.
Screen saver - is Menu allows the user to enable and disable the screen saver.
Acoustic Alarm - Menu to enable/disable the acoustic alarm.
Minimum Brightness - It allows you to adjust the screen brightness when not using the controls.

19
Mareli Systems
The main frame shows:
time and date, chrono activation, combustion
power and recipe, functioning state, error code,
main temperature, main thermostat,
summer/winter mode.
Button
Function
P1
P2
P3
P4
P5
P6
Exit Menu/Submenu;
Ignition and extinguishing (push for 3 seconds), Reset errors (push for 3 seconds), Enable/disable chrono;
Enter in User Menu 1/submenu, Enter in User Menu 2 (push for 3 seconds), Save data;
Enter in Visualizations Menu, Increase
Activation chrono time band
Enter in Visualizations Menu, Decrease
Led
Function
D1
D9
D2
D10
D3
D11
D4
D12
Igniter ON
Auger ON
Pump 1 ON
V2: Pump 2 ON
External Chrono reached
Lack of pellet
Local Room Thermostat reached
Sanitary water demand
Er01 - Security Error High Voltage 1. It may also intervene with the system o;
Er02 - Security Error High Voltage 2. It can only intervene if the Combustion fan is active;
Er03 - Extinguishing for low exhaust temperature or missing light in the brazier;
Er04 - Extinguishing for water over temperature;
Er05 - Extinguishing due to high exhaust temperature;
Er06 - Pellet Thermostat open (ame return from the brazier);
Er07 - Encoder Error. The error may occur due to lack signal from Encoder;
Er08 - Encoder Error. The error can occur due to problems of adjustment of the number of revolutions;
Er09 - Water pressure low;
Er10 - Water pressure high;
Er11 - Clock Error. The error occurs due to problems with the internal clock;
Er12 - Extinguishing for ignition failure;
Er15 - Extinguishing due to power failure for more than 50 minutes;
Er16 - RS485 communication error (Display);
Er17 - Adjusting the Air Flow Failed;
Er18 - No more Pellet in the bunker;
Er23 - Boiler probe or Back boiler probe or probe Buer open;
Er25 - Engine cleaning brazier broken;
Er26 - Engine cleaning broken;
Er27 - Engine cleaning 2 broken;
Er39 - Sensor Flowmeter broken;
Er41 - Minimum air ow in Check Up is not reached;
Er42 - Maximum air ow exceeded;
Er44 - Open door error;
Er47 - Error Encoder Auger: missing signal Encoder;
Er48 - Error Encoder Auger: Auger regulation speed not achieved;
Er52 - Error Module I/O I2C;
Er57 - Test ’Forced Draught High’in Check Up fail;
Service - Service error. It noties that the planned hours of functioning is reached. It is necessary to call for service.
ALARMS
CONTROL PANEL: USE AND FUNCTIONS
Description
Code
PRob
Hi
Clean
Port
Ignition
block
Cleaning on
Link Error
Anomaly of the probes checking, during Check Up phase.
Room temperature greater than 99 °C.
This message noties that the planned hours of functioning (parameter T67) are reached.
Door Open.
The message appears if the system is turned o during Ignition (after Preload) not manually:
the system will stop only when it goes in Run Mode.
Periodical Cleaning in progress.
No communication between motherboard and keyboard
MESSAGES
Exhaust T. [°C] - Exhaust temperature;
Room T. [°C] - Room Temperature ; it is displayed only if an input has been set as a Room Probe;
Boiler T. [°C] - Boiler Temperature;
Buffer T. [°C] - Buer Temperature, it is visible only if P26 is set on 2,3,4;
Pressure [mbar] - Water pressure;
Air Flux - Air ow; it is visible only if A24 is dierent from 5;
Fan Speed [rpm] - Exhaust fan speed; it is visible only if P25 is dierent from 0;
Auger [s] - Auger work time; it is visible only if P81 is equal to 0;
Recipe [nr] - Combustion recipe set; it is visible only if P04 is greater than 1;
Product Code: 510 - Product code;
VISUALIZATIONS
USER MENU 1
Combustion Management
Power - In this menu is possible to modify the combustion power of the system. It can be set in automatic or
manual modality . In the rst case the system chooses the combustion power. In the second case the user selects
the desired power. On the left side of the display are signalled the combustion modality (A=automatic combustion,
M=manual combustion) and the working power of the system.
Recipe - Menu to select the combustion recipe. The maximum value is the number of recipes visible to the user.
Heating Management
Boiler thermostat - Menu to change the value of the boiler thermostat .
Buffer thermostat - Menu to change the value of the Buer Thermostat; it is only visible if a plumbing plan with a
Buer is selected.
Room Thermostat - This Menu allows to modify the Local Room Thermostat’s value. It is visible only if the ambient
probe is select.
Summer-Winter - Menu that allows the selection Summer-Winter.
Manual Load
The procedure activates the pellet manual loading with activation in continue modality of the Auger engine. The
loading is stopped automatically after 600 seconds. The system must be OFF for the function can be activated.
Cleaning Reset
Menu to reset the ‘System Maintenance 2’function.

20
Mareli Systems
FUSE
1 2N
L
LINEA
3 4FF
NN
V1
5 6FF
NN
V2
7 8FF
NN
V3
9
10FF
NN
A1
11
12FF
NN
C
15
14
13
H1H2
16 17
A2
N
F
18
OFF
FON
20
21
A3
COM
N.C.
22N.O. 19F
23
24
A4
N
FON
25COM
26N.O.
A5
28 27 PW1
GND
30 29 PW1
GND
32 31 -
+
34 33 IN2
GND
36 35 IN3
GND
38 37 IN4
GND
41 40 GND
+V
39 IN5
43 42 +Vc
+V
45 44 IN6
GND
47 46 IN7
GND
49 48 IN8
GND
51 50 IN9
GND
53 52 IN10
GND
55 54 IN11
GND
57 56 IN12
GND
59 58 IN13
GND
POWER
CABLE
COMBUSTION
FAN
IGNITER
AUGER
PROTECTION
RETURN FLAME
PUMP 2
MOTOR FOR
CLEANING
MECHANISM
PUMP 1
RELAY FOR
CLEANERS
MECHANISM
16
N
EXHAUST
PROBE
ROOM
THERMOSTAT
DHW PROBE
BOILER
PROBE
DISPLAY
AUGER 2
PHOTOSENSOR
BUFFER HIGH PROBE
BUFFER LOW PROBE
VACUUM SENSOR
RED
BROWN
BLACK
COMBUSTION
FAN 2
DIAGRAM FOR SMB 50 KW ROTARY (NG21)