Pelltech PV50c User manual

PV50c pellet burner
User manual
DK9802C2

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Table of contents
Table of contents............................................................................................................................................. 2
1 General....................................................................................................................................................4
1.1 Unit description...............................................................................................................................4
1.2 References to other documents......................................................................................................4
2 Safety.......................................................................................................................................................4
2.1 Safety instructions for installation, use and service........................................................................ 5
2.2 Safety instructions regarding maintenance and cleaning...............................................................5
2.3 Warnings..........................................................................................................................................6
2.4 Notice ..............................................................................................................................................6
3 Set of components ..................................................................................................................................7
4 Description ..............................................................................................................................................7
4.1 Principal function.............................................................................................................................8
4.2 Safety devices..................................................................................................................................9
4.3 Specifications.................................................................................................................................10
4.4 Pellets ............................................................................................................................................12
4.5 Pellet quality..................................................................................................................................12
5 Requirements........................................................................................................................................13
5.1 Requirements to the boiler and boiler room ................................................................................13
6 Installation of the burner to the boiler .................................................................................................15
6.1 External auger ...............................................................................................................................16
6.2 Electrical connections....................................................................................................................17
6.3 Initial start up ................................................................................................................................18
7 Operation and service ...........................................................................................................................18
7.1 User interface................................................................................................................................18
7.2 Starting and stopping ....................................................................................................................19
7.3 Refilling the container ...................................................................................................................19
7.4 Log description ..............................................................................................................................19
7.5 Output power levels......................................................................................................................21
7.6 Main menu and settings................................................................................................................21
7.7 Regular maintenance ....................................................................................................................23
8 Replacing the components....................................................................................................................24
8.1 Replacing the igniter......................................................................................................................25

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8.2 Resetting safety thermostat..........................................................................................................25
8.3 Replacing fuses..............................................................................................................................26
8.4 Replacing fuel level sensors...........................................................................................................26
8.5 Replacing flame sensor..................................................................................................................27
8.6 Replacing feeder augers motor.....................................................................................................27
8.7 Replacing battery..........................................................................................................................28
9 State change logic..................................................................................................................................29
10 Error messages and solutions............................................................................................................31
11 Restoring factory parameters............................................................................................................31
12 Additional devices for PV burners.....................................................................................................31
13 Table of parameters ..........................................................................................................................31
14 Annex 1. Electrical diagram...............................................................................................................32
15 Annex 2. Screw connectors ...............................................................................................................33
16 Annex 3. Controller board EP0001B3................................................................................................34
17 Annex 4. Controller’s connectors......................................................................................................35
18 Annex 5. List of languages.................................................................................................................36
19 List of spare parts ..............................................................................................................................36
20 Declaration of confirmity ..................................................................................................................38
Warranty .......................................................................................................................................................39
Manufacturer of pellet burners PV50c: Pelltech OÜ
Manufacturers address: Sära tee 3, Peetri, Rae vald, 75312 Harjumaa ESTONIA
Name of the product: Pellet burner PV50c
Ph..+3726775277
www.pelltech.eu
[email protected]

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1General
This instruction manual is an integral and essential part of the product and must be kept by the user or
system manager. The owner / user shall read and understand this manual before installation and
operation of the boiler. This manual is intended for all users and contains general information,
installation instructions and handling with PV50c burner.
The manufacturer of the equipment, Pelltech OÜ, demands that the operator of the device is
competent and has sufficient knowledge in the field. The manufacturer does not take responsibility any
damage done to the equipment, personal injury, harm to animals or property damage if an
incompetent person or persons performs work for which he is not qualified or if the person operating
of the device fails to observe the instructions contained in the manual.
Note: Operator is the person or persons responsible for the installation, operation, adjustment,
maintenance, cleaning, repair or removal of the machinery.
1.1 Unit description
PV50c pellet burner is designed for solid fuels combustion in form of pellets. The burner operates
automatically and does not require supervision. The burner is designed to work with central heating
boilers for solid fuels, as well as several models of gas or oil boilers with a combustion chamber enabling
the collection of ash. The burner is an ecological device as it uses fuel from renewable sources. It also
features a small demand for electricity.
Main technical data and dimensions are given in section Specifications. Main components of burner are
depicted in Figure 4 and described in Table 2.
1.2 References to other documents
Following document is original user and installation manual for PV50c. In this document are references
made to:
DK0391 - Software and problem handling manual for PV20…PV500
2Safety
Read and follow these directions carefully. Read the safety instructions carefully before installation.
Always follow the safety instructions during installation and during maintenance.
Installation, operation, service and other work must be carried out by qualified personnel in accordance
with local codes and regulations.
Proper installation of the burner is necessary for safe and efficient operation. Installing this product
improperly may result to damage of the goods. Contact your local building inspector to obtain any
necessary permits or inspection guidelines before installing the product. Contact local building or fire
officials about restrictions and installation inspection requirements in your area. Contact your local
authority (such as municipal building department, fire department, fire prevention bureau, etc.) to
determine the need for a permit. A working smoke detector is required and must be installed in the same
room as the boiler.

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2.1 Safety instructions for installation, use and service
The owner / user shall read and understand this manual before installation and operation of the burner.
For proper function and to avoid accidents and damage, these instructions must be followed. Wrong
handling and incorrect settings can result in injury, damage and / or malfunction of the equipment.
Following instructions apply:
Do not start the burner before it is connected to the boiler and the boiler is connected to the chimney.
To guarantee the efficiency of the appliance and ensure that it functions correctly, it is vital that
qualified personnel performs annual maintenance.
When the burner is connected to the main power supply the burner casing must always be mounted
Always make sure that the burner is unplugged from the main power supply before performing any
cleaning or maintenance.
Keep children away and do not touch the equipment during operation.
Make sure that no flammable or liquid materials are stored in the boiler room or vicinity of the boiler.
It is recommended to wear a respirator while handling pellets.
The boiler room where the burner is installed must fulfil all rules and recommendations in accordance
with local codes and regulations.
All electrical installation, plumbing, chimney sweeping and service work shall be done by certified and
qualified personnel in accordance with local codes and regulations.
2.2 Safety instructions regarding maintenance and cleaning
Touching live components can result in life threatening injuries. After switching the control unit off, there
are still live components inside the control unit until enclosure:
Switch OFF the power supply, e.g. at mains, and check the system is disconnected.
Hot surfaces and fluids can lead to burns:
Before maintenance and cleaning work, switch OFF the system and let it cool down.
Never touch hot surfaces on the boiler, burner, flue system or pipework.
Wear suitable personal protective equipment.
Hot surfaces and fire from aperatures can result in severe burns:
Doors, covers and aperatures fastened shut with screws must not be opened during heating
operation.
Allow hot components to cool down before removing.
When operating the ash container, there is a risk of fire and burns:
Wear suitable personal protective equipments.
Only dispose the hot ash in fireproof containers with covers.

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Disposal of hot ash in an unsuitable vacuum cleaner creates a risk of fire from ignition of filters and
plastics:
Use an ash vacuum cleaner that is specially designed for this purpose.
Never use domestic vacuum cleaners made of plastic with fabric/paper filters.
Wood dust, pellet dust, cinders and soot pose a risk to the eyes, skin and airways:
Wear suitable personal protective equipment, especially breathing equipment and safety goggles.
Note: Observe the country-specific regulations on the disposal of materials, waste and system
components.
2.3 Warnings
Changing the construction of the burner without written permission from the manufacturer is
forbidden.
For personal and operational safety, use only spare parts provided or approved by Pelltech OÜ in
order to avoid any damage to the boiler and dangers resulting from it. Use of spare parts not
provided or approved by Pelltech OÜ will void the warranty.
Welding is allowed only after disconnecting the burner from electric supply. The circuit board must
be removed from the burner.
Do not never open boiler door while the burner is in operation. Before carrying out any cleaning or
maintenance operations, disconnect the appliance from the mains power supply using the system
switch and/ or the relevant external components and let it cool down.
The appliance must not be used by anyone with little excperience and knowledge, unless they are
supervised or have been instructed to use the appliance by the person in charge of its safety.
2.4 Notice
Manufacturer of burners has right to make changes in burners constructions and its firmware.
Present user manual is original user manual for PV50c pellet burner.

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3Set of components
The burner is shipped with following components included:
1. Grate (set of 2).
2. Burner
3. Brackets for hose 2 pc
4. Fixating flange
5. Ceramic seal
6. 7-pole boiler connector
7. Hose 1m
8. External auger’s fixating chain 1m
4Description
PV50c is wood pellet burner for heating of domestic, industrial and public buildings. Typical setup includes
external pellet storage, external auger with hose to transport pellets from storage to burner, boiler (4)
and PV50c burner mounted to the boiler’s door.
Unique construction of PV50c allows using it in many boilers working in light oil or solid fuel or universal
boilers. Unique electric ignition and automatic choosing of per-set power levels make using the pellet
burner easier through the whole year.
Only wood pellets with diameter 6 or 8mm can be used to run the burner. Using other fuel is forbidden.
The PV50c burner is connected to the boiler with a standard 90 mm oil burner flange.
The burner is equipped with a safety thermostat, a melting hose, temperature sensor and back up battery
for protection against back-burning.
Setup components are depicted in Figure 1.
8

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Figure 1 Typical setup
Figure 2 Main installation components
4.1 Principal function
The PV50c burner is meant to be installed in a boiler and fuelled with wood pellets. The burner starts
always the operation by running a self test to ensure everything is working correctly. The burner is
equipped with a controller which is responsible monitoring and regulating all the processes of the
burner. Then a command is given to external auger which transports the pellets from a pellet storage
unit to the burner and from burner into the combustion chamber. After the delivery of fuel, the igniter
ignites the pellets. The air necessary for the combustion of the fuel is supplied by fan. Ash from
combustion in the burning chamber will be cleaned periodically by moving grates.
The burner will start and stop itself automatically according to the requirement of the heat. The burner is
equipped with several security features that protect it against overheating and that deal with other risks
that may arise during the operation.
The burner starts burning when the boiler temperature cools down and boilers thermostat switches on.
Burner runs until the pre-set maximum boiler’s temperature (switch-off temperature) has been reached.
After that burner stops safely burning procedure and goes to waiting status.
1
3
4
5
2
1. Container
2. Melting hose
3. External auger
4. Boiler
5. Burner
On Figure 2 are depicted main
components for installation:
1. Case of burner
2. Flange fixating M8 screws 4 pcs*
3. Flange
4. Ceramic seal
5. Burning chamber
6. Washers M8 4 pcs*
7. Boiler’s door
*Not in set

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4.2 Safety devices
The burner will be in every moment monitored by controller board to ensure safe and faultless
operation. Back-burning is the biggest danger risk at burners working procedure. Back-burning appears
when usual pressure or draught conditions have changed in boiler’s combustion chamber.
In order to secure operational and fire safety, PV50c burner is equipped with following safety devices:
Burners controller board: Controller is always monitoring burners work. If any kind of abnormal
activities should occur that would obstruct normal operation, the burner will make controlled
shutdown.
Flame sensor: The flame sensor monitors that the unit is burning after the start sequence begins
and during operation mode.
Temperature sensor: Monitors the temperature of the pellet feeding tube. In case of higher
temperature than normal, the burner will automatically go into end cycle of burning process.
Back up battery: If mains supply is lost, the burner runs on backup battery power and feeder
auger transports pellets from feeder’s tube to the burning chamber. Battery voltage is checked
always at startup and continuously monitored during the operation.
Safety overheat thermostat: Switches off the main power supply if the burner is overheated.
Feeder auger is unloaded by using battery power. Thermostat is triggered at 65oC and has to be
reset manually.
Melting hose: The external auger is connected to the burner with a special hose, which is made
from easily melting polyurethane material. Such measurement avoids entrance of the flame
from burner into external auger and pellet container.

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4.3 Specifications
Figure 3 Burners main measurements
Table 1 Burner’s main measurements
Description
Unit
Value
L total length
mm
560
L1 burner housing length
mm
175
L2 burning chamber´s length
mm
260
D burning chamber´s width
mm
180
⌀D1 burning chamber´s neck diameter
mm
90
⌀D2 internal feeder inlet diameter
mm
60
H total height
mm
275
H1 burner housing height
mm
230
W total width
mm
240
Mass
kg
17
Supply voltage
VAC
220-240
Power max
W
570
Power average
W
25 - 40
Power at standby
W
7
Noise
dB
52
Emission class (EN 15270)
-
5
Operating temperature
Co
0-60
Nominal heat input
kW
50
Min heat input
kW
20

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Figure 4 Main components of burner
Table 2 Main components list
No
Name
Description
1
Burning chamber
Place where pellets are burnt. Burning grates are made of cast iron.
2
Burner housing
Part of the burner that is located outside the boiler. Incorporates internal
auger, fans, controller etc.
3
User interface
2-row LCD screen, LED indicators display burner statuses and other info.
Navigation buttons enable to make changes in burner’s settings.
4
Feeder auger inlet tube
External fuel supply line (hose) is connected here.
5
Feeder auger feed
spiral
Is connected with motor and transports pellets from inlet to the burning
chamber. Internal auger is controlled by controller board.
6
Burning chamber back
wall
Replaceable stainless steel wall that separates hot and cold surfaces and
reduces heat transfer through boiler door.
7
Grates (set of two)
Cast iron grates of burning area. Air is supplied through holes in grates. Lower
grate is moved by motor.
8
Ceramic igniter
(heating element)
Electric heating element to heat up air and ignite pellets in burning chamber.
9
7-pole burner’s plug
Plug for connecting power supply, flue gas fan, ERR output and working
thermostat
10
Power supply
AC-DC converter to supply internal controller board, feeder motor, fans and
sensors.
11
Burners temperature
sensor
Feeder’s tube temperature sensor to stop burner when back burning.
12
Battery
Backup battery to enable safe shut down in case of supply mains interruption.
13
Feeder motor
Rotates feed spiral and gives feedback of amount pellets delivered into
burning chamber.
14
Primary fan
Blows air down the grates in burning chamber according to power level.
15
External auger’s plug
For connecting external auger.
16
Secondary fan
Blows air into burning chamber.
17
Controller board
Electronic control unit to turn on/off burner and external auger, regulate
combustion air supply etc.
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
11
19

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18
Fuel level sensor
Optical sensor to detect the presence of pellets in internal auger inlet.
Normally, external auger is switched on, if no pellets detected.
19
Burning chamber cover
Replaceable cover to retaining combustion quality.
4.4 Pellets
Wood pellets are an environmentally-friendly biofuel type. The advantages of the pellets are the
significantly lower prices compared to other fuel varieties, simplicity and convenience. Wood pellets are a
product made by compressing renewable biomass - generally residuals from the wood and/or agricultural
products industry. Pelletized biomass is a high density, low moisture product with a high heating value
that burns cleanly, consistently and efficiently.
Only wood pellets according to EN 14961-2 (ENplus-A1, ENplus-A2, EN-B) can be used in PV50c burners.
Table 3 Wood pellets key data
Raw material
Sawdust, cutter shavings, stem wood, logging residues, bark,
chemically untreated wood
Calorific value
4700-5100 kWh/ton
Bulk density
ca 650-670 kg/m3
Volume of 1 ton
1.5-1.6 m3
Diameter
6 or 8 mm
Length
3,15-40 mm
Fines content (<3,2 mm)
< 1%
Moisture content
< 10 %
Ash content
< 3%
Ash fusion
> 1100 oC
To replace 1000 l light oil
ca 2 tons or 3 m3
NOTICE: Nominal power of the burners is given for the use of pellets produced in accordance with DIN or
DIN Plus Specifications. For pellets with other combustion parameters, in particular with a different
calorific value, ash level and moisture –the power of the burner may be different, usually smaller.
Burner, external auger and container form a common system. Size and location of the container depends
on needs and possibilities of boiler room or boiler house. When choosing container note that:
1. The volume of pellets container in same room with boiler doesn’t exceed 500 liters (ca 350 kg)
2. Container is made from fireproof material
3. Container is placed in the way that rising angle of external auger doesn’t exceed 450. See Figure 12.
4. Container should be closable with cover.
5.
4.5 Pellet quality
Not all wood pellets make good fuel. It is always a good idea to review the pellet’s analysis and try some
before committing to several tons. Higher pellet quality allows for more efficient operation. Many
variables contribute to the quality of a wood pellet. Many of these have been identified and are regularly
tested for by most pellet manufactures and distributors.

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Pellet material: Pellets should be made of softwood or hardwood or some combination of the two.
Pellets should smell like wood. If not, then other materials may have been used in their manufacturing
process. Examples are cardboard and paper that produce excessive ash and require chemical binders to
hold the pellets together. All wood pellets (100% wood) don’t require binders and rely on the lignin in
the wood to hold the pellets together. A few all wood pellets dropped in a glass of water should swell up
quickly. If they don’t swell up, this may be an indication that the pellets are not entirely made of wood.
5Requirements
5.1 Requirements to the boiler and boiler room
If you are not using a boiler provided by us, then it is important to check that the combustion chamber in
the boiler is big enough to ensure that the flame does not come in contact with the water-cooled walls.
Verify that the boiler’s capacity range complies with the burner. There must be enough space for the ash
to accumulate. The exhaust gas channels should not be so narrow that they can easily be clogged with
ash.
In order to install the burner, the boiler must correspond to the following requirements:
It is recommended to use three pass boilers.
The door of the boiler must have a 90 mm opening (placement opening for the oil burner).
The thickness of the boiler door must be less than 100mm.
The construction of the boiler must make it possible to open the door of the boiler with the burner
connected and removing ash from the furnace. If the door of the boiler is too narrow for opening it
with the burner, then extra hinges must be installed.
If there is not sufficient (less than 5- 20Pa) draught in the furnace, a flue gas fan should be installed to
improve the draught of the exhaust gases.
The boiler room where the burner is installed must fulfil all rules and recommendations given by
authorities.
The boiler must be positioned in a way that there is enough space for cleaning the burner, the boiler
and the smoke pipe and removing the ash.
If flue gas temperature at the top of the chimney is less than 80Coa metal pipe should be installed
throughout the length of the chimney.
Pellet burners need regular cleaning and therefore boiler construction must allow the door to be opened
without removing the burner. The minimum boiler opening radius depends on the position of door hinges
and opening. Figure 5 below illustrates the situation. Point C is critical.
In order to keep door width minimum and boiler opening small, a double hinge solution can be used. As
double hinges add another degree of freedom, door must be fastened on both sides. Slide-out doors with
guide rails is also an option.

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Figure 5 Critical point
Model
PV50c
Min. furnace total length –L
520
Min. furnace diameter –H
400
Min. distance under the burning chamber –H1
100
Dimension
Unit
Value
⌀D hole for burning
chamber neck
mm
90
⌀D1 flange bolt ring
diameter
mm
130..150
⌀D2 bolt holes
mm
8..9
Table 4 Dimensions of fixating holes
Figure 6 Boiler firebox requirements
Figure 7 Mounting holes with supplied flanges
for boiler door
Double hinges

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6Installation of the burner to the boiler
Following tools are needed in order to install the burner:
Spanner no. 13
Spanner no. 10
Cross-head screwdriver
4 mm hex wrench
1
1
4
3
2
8
7
6
5
1. Remove burning chamber from the burner
housing by loosening burning chamber
bracket bolts (1). There is no need to
remove brackets or bolts completely.
2. Remove burning chamber by pulling and
slightly rotating it. At the same time motor
of grate lever and its power screw are
releasing from fast joint.
There is no need to remove grates when
connecting PV50c burner with its burning
chamber. Grates and grate lever may stay on
their places. They are connected to burners
housing via fast joint. If there is need to remove
grates anyway, e.g. for cleaning firstly remove
the upper grate (2) by lifting it up and then
lower grate (3) by releasing it from power
screw’s motor rod(4) Figure 9.
3. Fixate the flange (5) with bolts the door of
the boiler (6). Make sure that the opening of
the flange and the opening of the boiler door
are aligned.
4. Fixate the burning chamber (7). For that
place a ceramic seal (8) on the tube of the
burning chamber and pull tube through the
door in a way that chamber leans on the door
of the boiler. Fixate the burning chamber with
two hex grub screws to the flange Figure 10.
5. Connect the housing of the burner to the
burning chamber like it was done before
disassembling in step 1.
Figure 8 Brackets to move
Figure 9 Removing grates
Figure 10 Fixating elements

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6. Make sure that the end of burners feeder auger tube and rear wall of the burning chamber were in one
level and brackets (1) would enter freely to its nests. If not so, turn the power screw of linear motor
clockwise and try again. Make sure when connecting burners housing with burning chamber that fast
connection joint of linear motor and grate moving bar are connected i.e. stud on motor side and the slash
on power screw are in one line and connected.
7. Remount both grades in right order and right directions. Make sure that lower grade is connected to
linear motor rod’s power screw and fixing slots of upper grade are placed onto fixating studs in back side
burning chamber.
6.1 External auger
The external auger transports pellets from the pellet container to the burner. The burner controls the
work of the external auger. The external auger is connected to the burner with a special ∅60mm hose.
The hose is made of melting polyurethane material and acts as a safety measure against back-burning.
External auger can be fixed to a ceiling or container depending on conditions at the site. Figure 12 shows
correct placement for external auger.
External auger must be installed as described below:
Hang auger to ceiling or fixate it to the boiler in the way mentioned below.
Install hose between auger and burner. Fixate hose with 2 brackets from both ends.
Connect auger’s cable to burner. Make sure that plug is surely connected with socket.
Make sure that:
The vertical distance between the output of external auger and burner is 400 –700 mm.
The horizontal distance between the output of external auger and burner is 100 –200 mm. It ensures
that the hose will melt incase of back-burning.
The raising angle of the auger doesn’t exceed 45° to ground, otherwise the auger doesn’t manage to
transport enough pellets.
In order pellets can fall freely into burner, the falling angle must be between 50° and 85°.
Plug of the external auger is surely connected with burner’s socket.
Igniter
Caution! Make sure, that after mounting the
igniter’s end tip was at same level with the
burner’s rear wall and don’t reach out or hasn’t
got stuck behind the rearward wall Figure 11.
Figure 11 Right placement of igniter

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6.2 Electrical connections
The burner is equipped with a standard oil burner plug that has 7 contacts. There are different connection
schemes used for different boilers. Usually the burner is connected to the boiler with a 5- wire cable or 4
wire cable Figure 13. In both cases connection of the boilers thermostat is different. There are depicted
plug connections of the external auger, flue gas fan and boiler in Figure 14.
Notice! All electrical connections of the burner must be done by a qualified personnel.
45o max
40-70 cm
10 .. 20 cm
4- wire connection
Tt –boiler’s thermostat
Figure 12 External auger installation
Figure 14 Boiler connections
Figure 13 Boiler connections
5 –wire connection

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6.3 Initial start up
Before starting the burner for the first time up, make sure that:
Burner housing and burning chamber are securely connected by brackets.
The neck of burning chamber sits correctly in burner’s housing.
Both grates are correctly installed in burning chamber.
Igniter can be seen from burning chamber and it is not stuck behind back wall of the burning chamber.
Boiler thermostat is connected to the burner and works correctly.
Boiler thermostat is set to lowest temperature.
External auger is connected to burner and auger is installed according to requirements.
Boiler is connected to chimney, dampers are opened and there is enough draught. When burner is
operating, the underpressure inside the boiler should stay between 4-6 Pa.
Boiler’s air hatches are closed and all combustion air goes through the burner.
Electrical plugs of external auger and boiler are pushed completely into sockets.
7Operation and service
7.1 User interface
The burner is controlled by user interface on the front panel. The burner is controlled via user interface on
the front panel. LCD screen (1) displays settings menu, event log and momentary status and error
messages of the burner. Yellow LED (2) shows the presence of flame in burning chamber. In case it blinks,
the burner is out of normal operation. Momentary state of burner is displayed in STATUS menu’s lower
row. To reach the lower row, push “down” (↓) button up to reaching requested row. Green LED (3)
indicates existence of fuel in the burner. To move in menus and set parameters use “up” and “down”
(↑↓) buttons. To approve parameters changes press OK. To go back to STATUS menu, press “ESC”
button. See Table 5.
2
1
3
4
Figure 15 User interface

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Button
Pressing the button time
Action
OK
Less than 3 seconds
Entering into sub-menu
Confirming setting (when blinks)
OK
More than 3 sec
Resetting error status and turning burner ON
OK
More than 3 sec in INFO
menu’s submenu COUNT
Resetting pellets interim counter
OK
More than 3 sec in NO POWER
status
Switching burner and battery OFF
ESC
Less than 3 seconds
Moving back in menu. Cancelling setting (when
blinks)
ESC
More than 3 seconds
Turning burner OFF
OK + ESC
More than 3 seconds
Burner’s reset
OK + Ʌor V
More than 3 sec in INFO menu’s
U=… I= … submenu
Moving burners grate forward Ʌ or back V. (Since
software 3.91.18)
7.2 Starting and stopping
To turn on the burner:
turn on the boiler’s main switch. If burner displays STOPPED, set in main menu BURNER from
OFF to ON or push OK button more than 3 seconds
turn boiler’s thermostat to desired temperature
To stop the burner:
turn boiler’s thermostat to lowest temperature or
set in main menu BURNER from ON to OFF or
push ESC button more than 3 seconds
In all cases the burner stops working when all pellets in burning chamber are burnt and turns safely to
STOPPED status.
Warning! Never turn off working burner from boilers main switch. Use the boilers thermostat for that. In
order to complete burning procedure safely let the burner to burn all fuel in burning chamber. Never
leave burner unattended when you had to stop boilers work by turning boiler off from mains switch in any
reason.
7.3 Refilling the container
Fuel can be added at any time during the operation. If the container runs empty before new fuel is added,
pour more fuel into container and restart the burner by pressing OK button down for 3 seconds or
switching from main menu BURNER ON. Starting will take more time because external auger has to be
loaded as in initial start up.
7.4 Log description
Log screen STATUS menu displays last and actual events (burner statuses). Burner displays in STATUS
menu last row actual status or error message and their duration. Statuses that remain upper of last row
are in historical sequence and start from down to up. Use “up” (↑) button to move back in history. Burner
changes its statuses based on received input signals from sensors and parameters set by user.
Table 5 User interface control buttons

DK9802C2 PV50c user manual ENG
Vers: C2 page20/38
Table 6 Burner status description
Status
message
Description
STOPPED
The burner is turned off from main menu.
WAITING
Burner is turned on and waits for boiler’s thermostat to switch on. There are no time limit
for WAITING status. Feeder auger works periodically at WAITING time and makes ½ rotations
after every 2 minutes. When thermostat switches on, burner goes to TESTING.
TESTING
At this state burner will run a short self-test to ensure everything is working normally. Any
failure will turn off the burner and will require attention.
CLEANING
In the end of TESTING burner starts the CLEANING procedure, during what the burning
grates are moved back and forward in order to remove ash out of burning chamber. Lower
grate moves with the help of motor down the upper grate. Ash falls to front of lower grate
and is pushed out of burning chamber. Cleaning takes place:
Always after switching burner on or resetting error state
At interrupted work after time set in PAR48 after first testing
At uninterrupted work after reaching double time set in PAR48. Burner will be stopped to
perform cleaning
Time between two cleaning cycle can be set from PAR48. If PAR48 is set to “0” no cleaning
takes place.
LOADING
At this state internal feeder will feed the pellets to burning chamber. Maximum load time is
limited to 5 minutes in normal conditions and 20 minutes when burner has been STOPPED or
run empty of pellets. Igniter is pre-heated in the end of LOADING cycle. Igniter is switched on
for max 1 min in order to save its lifetime. At the LOADING time, external auger holds
permanent fuel level in the feeder tube. Depending on the level sensor signal, the external
auger is turned on or off.
LOADING2
If flame is not detected after 4 min 10 sec second small amount of pellets according to
PAR25 is delivered to burning chamber. New attempt of ignition. If flame is not detected in
second IGNITION, E24IGNITION is displayed.
IGNITING
he pellets are in burning chamber ingnited. Igniter and fan are working until photocell
recognizes the flame. To avoid overheating igniter works 50 second cycles, staying on time
defined in PAR85. In ignition mode the fan blows hot air according to rotations set in PAR8. If
flame is not detected for 4 min 10 sec then the burner will do LOADING2 .
PRE-BURN
The purpose of pre-burn mode is to fully ignite the pellets that were loaded for ignition. Only
fan blows, igniter is switched off. Pellets start to burn. Pre burn consists of 1-4 cycles with
duration 30-80seconds each. Little amount of fuel is added between cycles. PRE-BURN time
and number of igniting cycles is pre-set with PAR41 and PAR42.
BURNING
This is the main operation status in burner operation. Burner can operate on 11 different
power levels. There are 6 main power levels, which can be selected and adjusted and 5
virtual power levels between main levels that can’t be adjusted or selected. For every power
level fan speed is fixed with PAR1...6. The fan speeds for virtual levels are calculated as
average from previous and next main level speed. External auger is holding permanent fuel
level in the feeder tube during BURNING state. The auger is controlled by fuel level sensor in
following manner:
External auger is started after level sensor does not recognize fuel in burner and internal
feeder has done 1/2 rotations set in PAR81.
External auger is stopped when level sensor recognize fuel in burner for more than ½
seconds, set in PAR82.
Burner will enter E28LEVEL fault condition in following cases:
Fuel loading timeout (no signal for specified period of time).
Fuel unloading timeout (signal lasts longer than specified period of time).