SWEBO PB/20 User manual

SWEBO Bioenergy
Manual pellet burner PB20
Rev no. Date Page
PBM1:12 2018-01-22 1 (36)
Installation and maintenance instructions

SWEBO Bioenergy
Manual pellet burner PB20
Rev no. Date Page
PBM1:12 2018-01-22 2 (36)
TABLE OF CONTENTS
1GENERAL INFORMATION............................................................................................................ 5
1.1 PELLET STORAGE............................................................................................................................. 5
1.2 CONSTRUCTION AND FUNCTION ........................................................................................................ 6
1.2.1 Name and location of key components.................................................................................. 6
1.3 PELLET BRAKE IN DROP PIPE............................................................................................................. 7
2SAFETY FUNCTIONS.................................................................................................................... 7
2.1 OVERFEED PRINCIPLE (CHUTE)......................................................................................................... 7
2.2 NON-COMBUSTIBLE FEED TUBE......................................................................................................... 7
2.3 OVERHEAT PROTECTION .................................................................................................................. 7
2.4 FLAME DETECTOR............................................................................................................................ 7
2.5 MONITORED SHUT-OFF OF THE AUGER MOTOR FOR PELLET SUPPLY.................................................... 7
3TECHNICAL DATA ........................................................................................................................ 8
3.1 FUEL TYPE....................................................................................................................................... 8
3.2 ELECTRICAL DATA............................................................................................................................ 8
3.3WIRING DIAGRAM............................................................................................................................. 8
3.4 MEASUREMENTS AND DIMENSIONS.................................................................................................... 9
4INSTALLATION............................................................................................................................ 10
INSTALLING IN THE BOILER.................................................................................................................... 10
4.1 CONNECTING TO THE MAINS POWER................................................................................................ 10
4.2 AUGER MOTOR .............................................................................................................................. 10
4.3 FAN............................................................................................................................................... 10
4.4 ELECTRIC FIRING DEVICE................................................................................................................ 11
4.5 OVERHEAT PROTECTION DROP PIPE................................................................................................ 11
4.6 FLAME DETECTOR.......................................................................................................................... 11
4.7 EXTRA ALARM INPUTS 1-2 .............................................................................................................. 11
4.8 ALARM OUTPUT A-ALARM ............................................................................................................... 11
4.9 REMOTE PANEL.............................................................................................................................. 11
4.10 EXTERNAL TEMPERATURE SENSOR ............................................................................................... 11
5CONTROL SYSTEM .................................................................................................................... 12
FIRING SEQUENCE ............................................................................................................................... 12
PROGRAMMING.................................................................................................................................... 12
MENU TREE......................................................................................................................................... 12
(6.)1 CONFIGURATION........................................................................................................................ 20
1.1 PROGRAM VERSION ....................................................................................................................... 20
1.2 CONNECTIONS............................................................................................................................... 20
1.2.1 Remote panel....................................................................................................................... 20
1.2.2 Network................................................................................................................................ 20
1.3 START RAMP FAN........................................................................................................................... 20
1.4 ACCUMULATOR TANK ..................................................................................................................... 20
1.5 POWER REGULATION...................................................................................................................... 20
1.6 AVAILABLE POWER STAGES ............................................................................................................ 20
1.7 FLAME DETECTOR.......................................................................................................................... 20
1.7.1 Firing.................................................................................................................................... 20
1.7.1.2 Delayed firing.................................................................................................................... 20
1.7.2 Extinguished ........................................................................................................................ 20
1.7.2.1 Level extinguished ............................................................................................................ 20

SWEBO Bioenergy
Manual pellet burner PB20
Rev no. Date Page
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1.8 SERVICE MODE.............................................................................................................................. 21
1.8.1 Enter code............................................................................................................................ 21
(6.)2 FIRING SEQUENCE..................................................................................................................... 21
2.1 BLOW CLEANING ............................................................................................................................ 21
2.2 PRE-HEATING ................................................................................................................................ 21
2.3 START DOSE.................................................................................................................................. 21
2.4 FAN............................................................................................................................................... 21
2.4.1 - 7 Fan sequence................................................................................................................. 21
2.4.x.1 Fan time ............................................................................................................................ 21
2.4.x.2 fan speed........................................................................................................................... 21
2.5 MAXIMUM TIME FIRING DELAY.......................................................................................................... 22
2.6 FIRING ATTEMPT ............................................................................................................................ 22
2.6.1 Number of Firing attempts ................................................................................................... 22
2.6.2 Start dose 2 & 3 ................................................................................................................... 22
2.7 PRE-OPERATION............................................................................................................................ 22
2.7.1 Start delay............................................................................................................................ 22
2.7.2 Lighting time......................................................................................................................... 22
2.7.3 Feed time............................................................................................................................. 22
2.7.4 Pause time........................................................................................................................... 22
2.7.5 Fan speed............................................................................................................................ 22
(6.)3 POWER STAGES......................................................................................................................... 22
3.1 STOP TEMPERATURE...................................................................................................................... 22
3.2 START TEMP.................................................................................................................................. 22
3.3 AUTOMATIC REGULATION................................................................................................................ 22
3.3.1 Desired value temp.............................................................................................................. 23
3.3.2 Power around temp.............................................................................................................. 23
3.3.3 Power surrounding time....................................................................................................... 23
3.4 POWER STAGES............................................................................................................................. 23
3.4.x.1 Feed time .......................................................................................................................... 23
3.4.x.2 Pause time ........................................................................................................................ 23
3.4.x.3 Fan speed ......................................................................................................................... 23
3.4.x.4 Low power mode............................................................................................................... 23
3.4.x.5 Low power temp................................................................................................................ 23
3.5 MAX.LIGHTING TIME ...................................................................................................................... 23
(6.)4 DAMPING DOWN......................................................................................................................... 23
4.1 BLOW CLEANING ............................................................................................................................ 23
4.2 FAN SPEED.................................................................................................................................... 23
(6.)5 FAILSAFE OPERATION .............................................................................................................. 23
5.1 START DELAY................................................................................................................................. 24
5.2 FEED TIME..................................................................................................................................... 24
5.3 PAUSE TIME................................................................................................................................... 24
5.4 FAN SPEED.................................................................................................................................... 24
(6.)6 ALARM ......................................................................................................................................... 24
6.1 AUXILIARY MENU NOT USED............................................................................................................ 24
6.2 ALARM MEMORY ............................................................................................................................ 24
6.2.1 - 6.2.8 Alarm memory .......................................................................................................... 24
6.3 ALARM SOUND VOLUME.................................................................................................................. 24
(6.)7 MANUAL OPERATION ................................................................................................................ 24
7.1 TEST MODE ................................................................................................................................... 24
7.1.1 Start dose............................................................................................................................. 24

SWEBO Bioenergy
Manual pellet burner PB20
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7.1.2 Dose power stage................................................................................................................ 24
7.1.3 Electric firing ........................................................................................................................ 25
7.1.4 Fan speed............................................................................................................................ 25
7.2 EMERGENCY LIGHTING................................................................................................................... 25
7.2.1 Feed time............................................................................................................................. 25
7.2.2 Pause time........................................................................................................................... 25
7.2.3 Fan speed............................................................................................................................ 25
7.2.4 Fan time on.......................................................................................................................... 25
7.2.5 Fan time off.......................................................................................................................... 25
(6.)8 STATISTICS ................................................................................................................................. 25
8.1 TOTAL OPERATING TIME ................................................................................................................. 25
8.2 RUNNING TIME MOTOR ................................................................................................................... 25
8.3 FEEDS........................................................................................................................................... 25
8.4 FIRINGS......................................................................................................................................... 25
8.5 RESET STATISTICS......................................................................................................................... 25
(6.)9 DEFAULT SETTINGS................................................................................................................... 25
9.1 TOTAL RESET................................................................................................................................. 25
9.2 CHECKING MODE ........................................................................................................................... 25
7OPERATING INSTRUCTIONS..................................................................................................... 26
7.1 STARTING THE BURNER AT FIRST POWER CONNECTION .................................................................... 26
7.2 FILLING THE FEED AUGER ............................................................................................................... 26
7.3 STARTING THE BURNER.................................................................................................................. 26
7.4 SWITCHING OFF THE BURNER ......................................................................................................... 27
7.5 STARTING THE BURNER AFTER A POWER CUT .................................................................................. 27
8MAINTENANCE INSTRUCTIONS ............................................................................................... 27
8.1 THE BOILER................................................................................................................................... 27
8.2 BURNER PIPE................................................................................................................................. 28
8.3 CLEANING THE EXTERNAL BURNER PIPE .......................................................................................... 28
8.4 FLAME DETECTOR.......................................................................................................................... 28
8.5 CHECKING THE SAFETY SYSTEM...................................................................................................... 28
8.5.1 Overheat protection ............................................................................................................. 28
8.6 PRIOR TO SWEEPING............................................................................................................... 28
9FAULTS AND CORRECTIVE ACTIONS..................................................................................... 29
9.1 ALARM “FLAME DETECTOR”............................................................................................................ 29
9.2 ALARM “OVERHEAT”....................................................................................................................... 29
9.3 ALARM “FAILSAFE OPERATION”....................................................................................................... 29
9.4 QUESTION MARK FILLED DISPLAY,”????????”................................................................................ 29
10 ADJUSTING THE BURNER......................................................................................................... 30
10.1NEGATIVE PRESSURE................................................................................................................... 30
10.2 FLUE GAS TEMPERATURE ............................................................................................................. 30
10.3 CHECKING FOR CONDENSATION.................................................................................................... 30
NOTES: ................................................................................................................................................. 31

SWEBO Bioenergy
Manual pellet burner PB20
Rev no. Date Page
PBM1:12 2018-01-22 5 (36)
1 GENERAL INFORMATION
The PB20 pellet burner is intended to replace oil burners, other types of pellet burner or for installation in existing boilers without
burners and for installation in one of the boilers compartments. Thanks to its small size and accompanying adapter plate it is
suitable for most types of boiler.
In terms of function a pellet burner does not differ greatly from an oil burner, it fires up or increases a power stage automatically
when the boiler temperature drops, or goes out or decreases a power stage when the desired temperature is reached. This
burner is also equipped with an extremely advanced and flexible electronic control system with a large number of adjustment
options with the possibility of modulated output. Modulated output means that the burner can operate in four independent power
stages. This means fewer firings as well as better operation. Both the fan and fuel feed can be adjusted separately for the four
power stages, further information can be found in section 6.
Often, the old overheat thermostat can also used for the new burner, which further facilitates the installation.
In line with development over the last few years, the required maintenance of the pellet burner has been reduced drastically and
can be considered to be minimal on these burners. (read more in chapter 10)
1.1 Pellet storage
Stores can be designed relatively generously according to what the space allows. However, Swebo’s 300 litre ready pellet store
or bulk store are recommended.
Regardless of the choice of store, it is extremely important that the feed auger’s angle towards the horizontal never
exceeds 45° and that the auger is installed in such a way that the blue tube exits at the side of the drop pipe when it
hangs freely. An example of a well planned out boiler room is shown below.

SWEBO Bioenergy
Manual pellet burner PB20
Rev no. Date Page
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1.2 Construction and function
1.2.1 Name and location of key components
The figure below shows an exploded view of the burner with its key components named.

SWEBO Bioenergy
Manual pellet burner PB20
Rev no. Date Page
PBM1:12 2018-01-22 7 (36)
1.3 Pellet brake in drop pipe
In some cases, it may be necessary to install a so-called
pellet brake, which prevents the pellets from bouncing out
of the burner. This may happen if the pellets used are
extremely short or hard, or if the tube between the auger
and burner is unusually long.
The plate that makes up the pellet brake is installed using
the supplied rivet and must be installed on the front of the
drop pipe in the pre-drilled hole. (see the figure to the right)
2 SAFETY FUNCTIONS
The burner and its surrounding equipment have a number of safety systems, which are described below. In the event of smoke
in the boiler room, ventilate and leave the room.
2.1 Overfeed principle (chute)
Pellets are supplied using the overfeed principle. The pellets are released down into the burner pipe from the feed auger, via the
flexible tube. In other words, it is the tube that separates the combustion part from the feed part.
2.2 Non-combustible feed tube
The blue tube that joins the feed auger and burner is designed to burn off in the event of a blowback fire. This is a safety
function and this tube must not be replaced with any other type of tube.
2.3 Overheat protection
On the burner’s drop pipe there is a heat detector that stops the burner when the drop pipe becomes unusually hot (>95
degrees). The sensor must be reset manually.
(When overheat is detected, the ”Overheat”, alarm is triggered, see chapter 6 ”Faults and corrective actions”).
2.4 Flame detector
The flame detector is a sensor in the system which detects the state of the flame and must be kept free of soot and dust. (read
more in chapter 7)
(In the event of a flame detector related problem, the ”Flame detector”, alarm is triggered, see chapter 9 ”Faults and corrective
actions”).
2.5 Monitored shut-off of the auger motor for pellet supply
The motor for the pellet auger has two shut-off functions. The normal working off/on function is continuously monitored by
checking that the voltage to the motor is only maintained when required, and when faults are detected all power to the motor is
cut via a main relay.

SWEBO Bioenergy
Manual pellet burner PB20
Rev no. Date Page
PBM1:12 2018-01-22 8 (36)
3 TECHNICAL DATA
3.1 Fuel type
The burner is designed for 6-8 mm wood pellets. Pellets corresponding to Group 1 in accordance with Swedish standard SS
187 120 are recommended.
3.2 Electrical data
Supply voltage 230VAC
Nominal output ~40W
Start-up output ~480W
3.3 Wiring diagram

SWEBO Bioenergy
Manual pellet burner PB20
Rev no. Date Page
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3.4 Measurements and dimensions
Space requirement:
A distance of 500 mm is required from the boiler where the burner is to be located to the wall (so that the burner can
be removed for cleaning).
A distance of at least 300mm is required from the front edge of the burner to the rear wall of the boiler.
It is also important that there is sufficient space under the burner for the ash that builds up after a week’s operation.
Note that the majority of the ash collects inside the boiler.
TECHNICAL DATA
PB|20
External boiler dimensions (W x H x D)
220 x 250 x 300
Internal firebox dimensions
156 x 200 mm
Combustion efficiency
approx.: 90%
Rated output in max. mode
20 kW
Rated output in half-speed mode
approx.: 10 kW
Voltage
230 VAC
Power consumption (average during
operation)
40 W

SWEBO Bioenergy
Manual pellet burner PB20
Rev no. Date Page
PBM1:12 2018-01-22 10 (36)
4 INSTALLATION
Installing in the boiler
Check the burner for damage.
Check that the required space is available inside
the boiler and that the burner is inserted a
sufficient way inside the boiler (for
measurements see technical data).
Install the burner in the oil burner compartment,
wood compartment or soot compartment.
After making holes in the cover, screw the cast
mounting flange into the cover and ensure that
the locking screw is upwards.
Ensure that the connection is sealed. Use heat
resistant sealant or fibre glass gasket to ensure
a sealed connection. Also ensure that other
boiler hatches and connections are sealed.
Install the loose stop plate at the front edge of
the burner pipe, see image below.
Install the burner in the flange with the locking
screw.
Check that the burner’s firing element is
correctly adjusted. Do this by removing the blue
cover. There are two screws under the burner
that hold the firing element. Slacken these off
slightly and slide as far as possible towards the
boiler and then retighten and reinstall the blue
cover.
Install the accompanying connector to the blue
tube and then install the connector in the drop
pipe. Note that the tube must be installed in such
a way that the pellets can fall through it
unhindered without getting stuck, see image
below, and that clamps must be used at both
ends.
Install the control panel in an appropriate place
(on the boiler or a wall, however, not directly
above the burner!).
NOTE! The panel and cable must be installed in
such a way that the connection cable can be
disconnected so that the burner can be removed
from the boiler and placed next to it.
Ensure that no combustible material is stored in
close proximity to the burner.
Any flue dampers must be kept fully open all the
time.
An alternative heat source must always be
installed in the event of a pellet burner
malfunction.
Note that the local authority as well as the local
chimney sweep must always be contacted with
regard to the installation of burners.
Note that the installation must be carried out in
such a way that variations in the draught
conditions do not affect the performance of the
burner. This is achieved most easily by installing
a draught regulator in the chimney.
4.1 Connecting to the mains power
The power cable supplied must not be connected directly
to the wall socket but must be connected via the overheat
protection installed on the boiler. It is also important that
the overheat protection can be manually reset. The main
fuse is located in the mains inlet on the automatic lighting
control device and connection of the incoming mains
supply must be carried out according to the figure below.
4.2 Auger motor
The auger motor is connected directly to the connector
socket on the automatic lighting control device with the
cable supplied.
4.3 Fan
The fan is used to supply air to the combustion and is
speed-controlled via phase angle control (Triac
Control).