NBE RTB 10 User manual

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Dear Customer.
Thank you for purchasing the RTB pellet system. This product is designed and manufactured
to the highest standards by NBE Productions in Denmark.
We recommend that you read this manual before you install and use the product, so you get
the most out of your wood pellet system. In the event that you encounter any difficulties
while installing or using your product, we recommend that you first read the instruction
manual or the information contained in the support section on www.nbe.dk.
Note: There is help text on all menus in the Version 7 boiler control system and therefore
menus are not described in this manual. It is recommended to study the menus before initial
start-up.
Keep this manual so you always have it available if you ever need it.
•Page 2: Safety first
•Page 3: The Clean Air Act 1993 and Smoke Control Areas
•Page 4-5: Boiler specifications
•Page 6: Burner specifications
•Page 7: Boiler room design
•Page 8: Chimney design
•Page 9: Ventilation
•Page 9-10: Hydraulic system
•Page 11: Wiring diagram
•Page 12: Wiring diagram extension module
•Page 13: Electrical connection scheme
•Page 14-15: Internet connection
•Page 16: Cloud service
•Page 17: First time start up
•Page 18: Cleaning the burner & boiler
•Page 19-20: Trouble shooting
•Page 21: Preventing flue gas condensation
•Page 22: Warranty
•Page 23: EC declaration of conformity
•Page 24: Installation checklist

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SAFETY FIRST
Never handle the auger, blower, nor crawl on the hopper when the system is
powered. There will be no warning prior to the activation of these components.
The boiler must not be operated without the shield on the burner.
The system is provided with an electrical current of 230V/50Hz. An improper
installation or improper repair can cause life-threatening electrical shock.
Electrical connections must be performed by the person who has the right skills
and training. Performance of electrical installation must be carried out in
COMPLIANCE with the relevant rules. Always disconnect the system from the electrical
supply prior to starting maintenance work or servicing. The system must be connected to a
separate electrical circuit, which is equipped with the proper circuit breaker and earth
leakage breaker.
The boiler must be mounted to a functioning chimney. In the event that you
smell smoke or see any other indication of improper draft of the chimney, all
operation of your system must cease immediately and must remain so until a
solution to the draft problem has been resolved. Continuing operation may
result in death or injury.
Always read the manual before installing and/or repairing of the system. If in
doubt, seek professional help.
Open top covers etc with extreme caution, there is a risk of high temperature
below the top covers which can cause burns. Avoid handling the boiler while it
is in operation. Never open the covers or ash tray while the boiler is in
operation.
The system must only be installed and commissioned by qualified installers. If
you are in doubt as to the safe operational use of the boiler, contact your
dealer.
The menu structure for the controller is supported by help texts found within each section of
the control box itself. Due to constant updates and new features, the menu structure of the
controller will not be described here in this manual. If in doubt, never alter the settings of
the boiler without consulting your installer. Incorrect settings will compromise the efficiency
of the boiler and could affect any warranty cover.
Your installer should give you a full hand over of the system and an overview of all functions
etc.
This manual must be kept with the boiler!

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The Clean Air Act 1993 and Smoke Control Areas
The RTB range of boilers listed below has been recommended as suitable for use in
smoke control areas. The recommended fuel for the boiler is 6mm or 8mm diameter wood
pellets to EN 14961 Part 2 class A1 wood pellets only.
RTB 10
RTB 16
RTB 30
RTB 50
Under the Clean Air Act local authorities may declare the whole or part of the district of the authority
to be a smoke control area. It is an offence to emit smoke from a chimney of a building, from a
furnace or from any fixed boiler if located in a designated smoke control area. It is also an offence to
acquire an "unauthorised fuel" for use within a smoke control area unless it is used in an "exempt"
appliance ("exempted" from the controls which generally apply in the smoke control area).
The Secretary of State for Environment, Food and Rural Affairs has powers under the Act to authorise
smokeless fuels or exempt appliances for use in smoke control areas in England. In Scotland and
Wales this power rests with Ministers in the devolved administrations for those countries. Separate
legislation, the Clean Air (Northern Ireland) Order 1981, applies in Northern Ireland. Therefore it is a
requirement that fuels burnt or obtained for use in smoke control areas have been "authorised" in
Regulations and that appliances used to burn solid fuel in those areas (other than "authorised" fuels)
have been exempted by an Order made and signed by the Secretary of State or Minister in the
devolved administrations.
Further information on the requirements of the Clean Air Act can be found here
http://smokecontrol.defra.gov.uk/
Your local authority is responsible for implementing the Clean Air Act 1993 including designation and
supervision of smoke control areas and you can contact them for details of Clean Air Act
requirements”
Fuel
The Robus RTB pellet boilers are designed for use with ENplus A1 grade wood pellets only. The use
of substandard fuels will compromise the efficiency, reduce the life span and invalidate the warranty
of the appliance.
What is ENPlus?
ENPlus is the European Quality Standard for the manufacture and supply of wood pellets.
Manufacturers and Distributors who have the ENPlus standard have been certified as meeting the
required quality standards and they are entitled to display the ENPlus logo and their own unique
License Number.

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SPECIFICATIONS BOILER & VAC
Product Name
RTB
10
RTB
10
Vac
RTB
16
RTB
16
Vac
RTB
30
RTB
30
Vac
RTB
50
RTB
50
Vac
Nominal Performance
10.5
kW
10.5
kW
17 kW
17 kW
25.2
kW
25.2
kW
45 kW
45 kW
Nominal Efficiency %
93.9
93.9
91.1
91.1
91.4
91.4
91.9
91.9
Power Consumption
(Nominal)
37W
37W
40W
40W
90W
90W
215W
215W
Minimum performance
3.0
kW
3.0
kW
5.0
kW
5.0
kW
7.5
kW
7.5
kW
13.5
kW
13.5
kW
Minimum Efficiency %
90.5
90.5
92.4
92.4
92.7
92.7
94.6
94.6
Power Consumption
(Minimum)
24W
24W
20W
20W
34W
34W
82W
82W
EN303-5:2012 Class
5
5
5
5
5
5
5
5
Controller Version:
V7
V7
V7
V7
V7
V7
V7
V7
Width (mm)
506
506
506
506
655
655
723
723
Depth (mm)
843
843
843
843
843
843
1043
1043
Height (mm)
1022
1827
1022
1827
1022
1827
1222
1827
Chimney Diameter
100
100
100
100
100
100
130
130
Weight (kg)
162
194
162
194
179
214
250
297
Water Volume (litre)
36
36
36
36
48
48
78
78
Ash Can (litre)
31
31
31
31
38
38
60
60
Flow and return size
¾”
¾”
¾”
¾”
¾”
¾”
1”
1”
Test # : 300-ELAB-
2042
2042
2045
2045
2064
2064
2109
2109
BOILER AND HOPPER
120kg:
Hopper Width 300 mm
Width (Boiler & Hopper 10&16) 806 mm
Width (Boiler & Hopper 30) 955 mm
Width (Boiler & Hopper 50) 1023 mm
Height 1300 mm
Depth 845 mm
Pellet Capacity: 120 kg
Compatible with RTB sizes: 10,16,30 & 50kW

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220kg:
Hopper Width 500 mm
Width (Boiler & Hopper 10&16) 1006 mm
Width (Boiler & Hopper 30) 1155 mm
Width (Boiler & Hopper 50) 1223 mm
Height 1300 mm
Depth 845 mm
Pellet Capacity: 220 kg
Compatible with RTB sizes: 10,16,30 & 50kW
320kg:
Hopper Width 700 mm
Width (Boiler & Hopper 10&16) 1206 mm
Width (Boiler & Hopper 30) 1355 mm
Width (Boiler & Hopper 50) 1423 mm
Height 1300 mm
Depth 845 mm
Pellet Capacity: 320 kg
Compatible with RTB sizes: 10,16,30 & 50kW
VAC 10/16:
Hopper Width 506 mm
Width (Boiler & Hopper) 506 mm
Height 1827 mm
Depth 845 mm
Pellet Capacity 50 kg
Compatible with RTB sizes: 10&16kW
Vacuum Transport is included.
VAC 30:
Hopper Width 655 mm
Width (Boiler & Hopper) 655 mm
Height 1827 mm
Depth 845 mm
Pellet Capacity 70 kg
Compatible with RTB sizes: 30kW
Vacuum Transport is included.
VAC 50:
Hopper Width 723 mm
Width (Boiler & Hopper) 723 mm
Height 1827 mm
Depth 1043 mm
Pellet Capacity 70 kg
Compatible with RTB sizes: 50kW
Vacuum Transport is included.

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BURNER
10kW burner:
Hourly fuel consumption
at 10kW output: 2kg
Power consumption
At nominal output: 37W
Weight: 10kg
16-24kW burner:
Hourly fuel consumption
At 16kW output: 3.4kg
Power consumption
At nominal output: 40W
Weight: 12kg
30kW burner:
Hourly fuel consumption
At 25kW output: 5kg
Power consumption
At nominal output: 45W
Weight: 15kg
40-60kW burner:
Hourly fuel consumption
At 50kW output: 10kg
Power consumption
At nominal output: 60W
Weight: 30kg
80-120kW burner:
Hourly fuel consumption
At 100kW output: 21kg
Power consumption
At nominal output: 200W
Weight: 40kg
150-200kW burner:
Hourly fuel consumption
At 200kW output: 41kg
Power consumption
At nominal output: 250W
Weight: 60kg

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BOILER ROOM
The boiler room for biomass boilers must be designed in accordance with building
regulations. Some parts of building regulations are used in the following section of this
manual to highlight the main requirements of installation. Full building regulation documents
are available online from the planning portal. The RTB pellet boiler must be installed by an
MCS installer who will design the boiler room to current regulations and notify building
control of all the work done.
General boiler room construction.
The boiler should be housed in a dry and dust free environment. Damp and dusty conditions
can affect the performance of the boiler, shorten its working life and void any warranty
claims. The RTB boiler range is not suitable for installation outside. The boiler room should
be well lit with enough area to refuel the boiler and work on the system safely.
Floor & wall construction.
Floors should consist of (or be covered with) non-combustible material under and around
the boiler of a distance of at least 300 mm from the boiler sides, and 500 mm from the
boiler’s front (i.e. the side where the ash is removed). For full details of solid fuel hearth
construction refer to The Building Regulations Approved Document J – Section 2: Appliances
burning solid fuel.
Boiler clearances.
The boiler and hopper must have sufficient clearance around all sides to allow easy
maintenance and cleaning of the system once installed.
Recommended clearances:
•Boiler side 500mm
•Hopper side 200mm
•Rear 200mm
•Front At least 1 x boiler width to allow door opening
•Above 1000mm

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CHIMNEY DESIGN
The RTB wood pellet boiler range has high operating efficiencies and
low flue gas temperatures. Correct chimney design and installation is
very important to the safe and efficient operation of the boiler and
should only be undertaken by a qualified installer. The cross
sectional area of the chimney should not be reduced or increased.
It is recommended to always install a new chimney system with the
boiler and never reuse an existing chimney. However an existing masonry chimney can be
used if it is lined with a solid fuel rated stainless steel flexible liner and back filled with
insulation to maintain the chimney gas temperature and prevent condensation forming. Tall
chimneys may need a condensate drain installing.
The outlet of the flue should be above the roof of the building in a position where the
products of combustion can discharge freely and will not present a fire hazard, whatever the
wind conditions. The flue outlet
positions shown here are taken
from Approved Document J –
Section 2 and can meet the above
requirement. The heights and
separation distances may have to
be increased in particular cases
where high wind exposure,
surrounding tall buildings, high
trees or high ground can cause
adverse wind effects.
A stable chimney draught of
between 5 and 23PA must be maintained at all times.
Point where flue passes through the weather
surface (see note 1 & 2)
Clearances to the flue outlet
A
At or within 600mm of the ridge
At least 600mm above the ridge
B
Elsewhere on a roof (whether pitched or
flat)
At least 2300mm form the nearest point on the
weather surface and;
a; at least 1000mm above the highest point of
intersection of the chimney and the weather
surface; or
b; at least as high as the ridge
C
Below (on a pitched roof) or within
2300mm horizontally to an openable roof
light, dormer window or other opening
(note 3)
At least 1000mm above the top of the opening
D
Within 2300mm of an adjoining building
whether, whether or not beyond the
boundary (note 3)
At least 600mm above the adjacent building within
2300mm
Notes;
1) The weather surface is the building external surface, such as its roof, tiles or external
walls.
2) A flat roof has a pitch less than 10°.
3) The clearance given for A or B, as appropriate, will also apply.

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VENTILATION
The RTB range of wood pellet boiler draws air for combustion from the room in which it is
located. Any such room or space containing an appliance must have sufficient permanent air
supply to the boiler. The ventilation area provided must be in accordance with the
requirements of The Building Regulations Approved Document J – Section 2: Appliances
burning solid fuel.
It is always recommended that RTB be installed with a draught stabiliser, as such requires a
permanent air vent with a total free area of at least 8.5cm²/kW to ensure the effective
operation of the chimney system and discharge all of the products of combustion.
It is recommended that the ventilation is positioned on the same side of the building as the
chimney to prevent any pressure difference during windy conditions.
Recommended permanent free area vent sizes.
RTB 10 (10kW)
85cm²
RTB 16 (17kW)
144.5cm²
RTB 30 (25kW)
212.5cm²
RTB 50 (46kW)
382.5cm²
HYDRAULIC SYSTEM
The RTB range of boiler must be installed with an approved ‘shunt’ or mixing valve to
prevent cool return water entering the boiler. Cool return water will cause condensation to
form within the combustion chamber and corrode the boiler.
Note: Failure to install an approved mixing valve will invalidate any
warranty claim should one arise.
The boiler circulation pump should always be positioned in the flow pipe from the boiler
between the boiler and the tee for the mixing valve. The mixing valve temperature sensor
should be positioned on the return pipe between the boiler and the mixing valve tee, as
shown
below.
The RTB range of boiler can be installed onto either an open vented or pressurised heating
system. If the system is pressurised then the pressure relief valve must be rated at no more
than 2.5bar maximum, over pressure can damage the boiler and will invalidate the warranty.

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Hydraulic schematics
1 DHW with 2 port valve: Typically used
when the DHW cylinder or the coil surface
area is small. Heat for the house is supplied
while DHW is being produced.
2 DHW with 3 port valve: Typically used
when the DHW cylinder or the coil surface
area is large. The house is not supplied with
heat while producing hot water. The house
must therefore be able to manage without
heat for short periods during the winter.
4 Weather compensation:Allows you to
have a high temperature on the boiler as
well as manage the supply temperature to
the house in relationship to the outside
temperature and chill factor.

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ELECTRICAL SYSTEM
Wiring diagram V7 & V10

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Wiring diagram extension module V7 & V10

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Electrical connections
IN
OUT
230
PE-N-L
230Volt AC
SAFETY THERMOSTAT
L-L
Safety thermostat cutoff
MOTOR
PE-N-L1
External auger
BURNER
PE-N-L2
Fan
BURNER
PE-N-L3
Internal auger
BURNER
PE-N-L4
Ignition
EKSTRA 1
PE-N-L5
Circulation pump can be set to other equipment.
EKSTRA 1
PE-N-L6
Compressor cleaning can be set to other equipment.
EKSTRA 2
PE-N-L7
Deashing Auger.
EKSTRA 2
PE-N-L8
Optional output for equipment.
EKSTRA 3
PE-N-L9
Boiler Compressor Valve 1
EKSTRA 3
PE-N-L10
Boiler Compressor Valve 2
BUS
GRD, TX, RX,
Expansion module
ILT
V1, V, V2
O2 controller
KONTAKT
K-K1
External ON/OFF
KONTAKT
K-K2
Free
PULS
P-P1
Flow meter system
PULS
P-P2
Flow meter solar heating
PULS
P-P3
Free
PULS
P-P4
Fan RPM
AFSTAND
-, SIG, +
Distance sensor for hopper
LAN
RJ45
Internet connection
TEMP.
T- T1
Boiler temperature
TEMP.
T – T2
Smoke temperature
TEMP.
T – T3
Boiler return temperature
TEMP.
T – T4
DHW temperature
TEMP.
T – T5
External temperature
TEMP.
T – T6
Free
TEMP.
T – T7
Free
EKS / FOTO
T – T9
Temperature sensor burner
EKS / FOTO
T-T10
Photo sensor burner
IN
OUT

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INTERNET CONNECTION
The RTB range of boilers is equipped with the latest web enabled version 7 controller. This
allows remote access to the boiler for monitoring, control and adjustment. Once connected
your boiler can be accessed through the Stokercloud web site www.stokercloud.dk
Getting connected
Step 1: Connect the controller to your router through an RJ45 cable;
this is a direct cable connection so there is no wifi password required.
Once the controller is connected a small icon will appear on the
controller screen. If a direct connection cannot be made to the router
these adapters can be used. They can establish a connection to your
router through your household power cables. This solution allows for
easy PLUG and PLAY.
Step 2: You can find your controller serial number (user
name) and password in the ‘system’ part of the menu.
Step 3: Go to www.stokercloud.dk and find your controller
by typing your serial number in the ‘find user’ scroll-down
at the top of the page or type your control number in the
search box.
Step 4: Log in and follow the instructions on Stokercloud
Step 5: Enter your new user name and password, your
personal details and system information.
Step 6: Stokercloud.dk will display the location of
your system via a drop pin on the stokercloud map.
If you do not want others to see the exact location
of your system simply move the drop pin a little.

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Step 6: Once your configuration is saved you will
have your own webpage and system dashboard on
Stokercloud. After a short period of time you should
see data streaming from the burner.
Stokercloud on your mobile.
A mobile App is available for the following devices. This will allow you to monitor your boiler
from anywhere in the world.
For Apple devices search ‘StokerApp’
For Android devices search ‘StokerControl’
For Windows devices search ‘StokerControl’
Cloud service.
If your burner is registered online via our website www.stokercloud.dk we are able to
monitor your system. If something unexpected happens such as too many ignitions,
unstable operation, improper PI regulation etc. then we have the opportunity to help you
ONLINE.

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How it works.
If your system is online, NBE can observe any
abnormalities that may occur. If necessary,
NBE will contact you by e-mail and ask your
permission to make operational changes. If
permission is granted, we will monitor your
systems operational graphs and burner
reaction pattern, and make adjustments
based on the observations. Any changes
made remotely can be viewed in the ‘event
log’ section of the controller menu.
After adjusting, it should look like this.
The Stokercloud Service gives you the peace of mind that your heating system is being
monitored and if persistent faults occur or you have a poorly performing system help is at
hand. You may not even realize that your boiler has a problem until you are contacted for
permission to make alterations.

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FIRST TIME START UP
Once the system is assembled, filled with water, supplied with power and pellets a few basic
adjustments to the burner are required. Step 1 is to calibrate the external auger by weighing
the wood pellet delivery. Step 2 is adjusting the fan setting at 10%, 50% and 100% power
to obtain the desired O2 and CO2 readings.
Step 1: Weighing the pellets
1. Detach the drop hose from the drop tube on the burner and
attach a plastic bag or similar underneath the drop hose (see
image on right.)
2. Go to the menu Manual Control>External Auger>ON.
This will force start the external auger. Allow the auger to run
for approximately 15 minutes. This will ensure that the auger
is completely filled and will allow for a more accurate weighing
later. Once complete discard the pellets from the plastic bag
and refasten the empty plastic bag to the drop hose.
3. Go to the menu Auger>Balancing>360s to activate the 360 second test. Wood
pellets will begin dispensing.
4. When the test is complete, remove the plastic bag, and weigh the
pellets on a kitchen scale. Enter the weight in the controller by going
to the menu Auger>Auger capacity/6 min> enter “pellet weight”
Step 2: Adjusting the Fan
1. Turn on the system by pressing the ON/OFF button on the controller.
2. Go to the Regulation menu> set Min power=100% & Max power= 100%. This
will lock output to 100% power. Allow 15 minutes for the burner to reach 100%
output. (Note: when locking output to 50% power, set Min & Max power = 50%.
Similarly, when locking output at 10%, set Min & Max power=10%)
3. Take a measurement of either the CO2% or O2% in the chimney using a flue gas
analyzer and ensure that the CO2% or O2% at 100% power are within range to the
values shown in the table below.
Power
O2%
CO2%
10%
7-9
12-14
50%
11-13
8-10
100%
15-17
4-6
If the O2% reading is too low, (or if the CO2% is too high) compared to the values
on the table, then increase the fan speed to increase the O2% and decrease the
CO2% in the combustion. Similarly, to decrease the O2% and increase the CO2%,
decrease the blower speed. To adjust the blower speed, go to the Fan
menu>Speed at 100% power and adjust the blower speed by a few % at a time.
Allow a few minutes for the adjustment to take effect. Take an O2% or CO2%
reading and confirm that the values shown are within the range of the values shown
in the table.
4. Repeat steps 1-3 to adjust the blower speed at 50% and 10% power. Remember
reset Min power=10% and Max power=100% before normal operation.

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CLEANING THE BURNER & BOILER
Cleaning should be carried out as needed. There is a big difference depending on
the construction setup, adjustments and wood pellet quality on how often maintenance
should be performed. The maintenance table is only indicative and applies only for RTB systems!
When
needed
7
days
14
days
30
days
6
months
12
months
x
x
Cleaning cinders out of burner head
x
Cleaning under the combustion grate
x
Cleaning photo sensor
x
Cleaning burner fan
x
x
Cleaning combustion chamber and flue ways
x
x
Empty the ash can, typically 1 to 2 tonnes of pellets burnt
x
x
Check and replace worn gaskets
x
x
Adjust the burner (weigh pellets)
x
x
Check O2 or CO2 levels
x
x
x
Fill the hopper
x
Empty and clean hopper (remove dust and fines)
x
Sweep chimney
Important note: Personal Protective Equipment must be worn while cleaning the boiler
including dust masks, eye protection and gloves. Soot and ash can be hazardous to health.
Turn off the burner in connection with cleaning.
Turn off the controller and allow the boiler to cool for approx. 15 min. Once the boiler has
cooled sufficiently unplug the burner, remove the shield and drop shaft then remove the
burner from the boiler so work can be easily performed.
Boiler.
All surfaces inside the boiler must be brushed clean of any deposits and the ash can must be
emptied. Pay special attention to any build-up of ash in the rear smoke chamber and flue.
Any residual ash can be vacuumed out of the combustion chamber; special care should be
taken when emptying a vacuum cleaner full of ash and soot.
Access the combustion chamber as follows:
•Remove the top casing of the boiler
•Disconnect and remove the first section of chimney
•Disconnect the air lines from the compressor clean
solenoids
•Remove inner combustion chamber lid
Never dispose of hot ashes in the trash, let them cool in a metal bucket. Hot ashes
can reignite when exposed to oxygen (air).
Burner head.
Remove any ash or cinders from the grate. Remove any pellet remnants under the burner
grate. Wipe the photo sensor clean. When re-inserting the photo sensor, ensure that the
sensor points towards the combustion grate. Ensure that there is nothing lodged in the fan
and that it can rotate freely.
Hopper.
Since wood pellets naturally contain dust, you should periodically empty the hopper
completely. The more dust that is present in the hopper the less the auger will dispense.
This will cause an unstable pellet supply to the burner causing the boiler to go out of
adjustment with a greater risk of downtime. How often you should empty the hopper
depends greatly on the design and quality of the pellets you use but do it at least once a
year.

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TROUBLE SHOOTING
Problem.
Possible cause.
Possible solution.
Alarm hot drop
shaft
Cinders in the burner head.
More air for combustion.
Back pressure in the boiler.
Clean the boiler etc..
No draft in the chimney.
Increase the chimney height.
Clean the burner head regularly.
Switch to a better quality wood pellets.
Smoke in the
hopper.
Ash in the boiler / flue.
Clean the boiler etc..
Smoke setbacks.
No draft in the chimney.
Insolate the smoke pipe.
Increase the chimney height.
Submerge a liner in the chimney.
Increase temperature of the smoke.
Drop shaft sensor
defective.
Change temperature sensor on the burner print.
Unfortunate wind
conditions.
Increase the chimney height.
Close doors, etc..
Make intake on the same side as the chimney.
Alarm ignition.
Defective ignition.
Replace the electrical igniter with a new one.
Ignition is located wrong.
Mount it correctly.
Burner grate is fitted
wrong.
Mount it correctly.
Too high chimney draft.
Install a draft stabilizer in the chimney.
Set electric ignition power up.
Reduce the fan speed during ignition.
Stopped fan.
Check if the fan can run, replace if necessary.
Alarm temperature
boiler.
Defective temperature
sensor.
Change temperature sensor.
Temp sensor fallen off the
boiler.
Mount it correctly; attach the sensor with a cable
tie.
Power too low compared
to the house.
Make a new adjustment of the burner.
Adjust the alarm limit down.
Add more power to the burner if possible.
Alarm motor
output.
Fault current on the
electric grid.
Supply the burner from another protection group.
Relay defective.
Send the controller in for repair.
Alarm no fuel.
Hopper is empty.
Fill hopper with wood pellets and restart.
Flame has gone in
operation.
Make a new adjustment of burner.
Photo sensor is defective.
Change photo sensor with a new one.
Unstable fuel supply.
Empty auger / hopper for sawdust.
Plug is
disconnected.
Burner plug is not fitted.
Insert the plug of the burner.
Dirt inside the plug to
burner.
Clean the plug for pellet dust.
No connection to the
burner print.
Change temperature sensor on the burner print.