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DK8101A2 - PV500a user manual ENG (1)

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PV500a pellet burner
User manual
DK8101A2
PV500a pellet burner
p 2/36
Table of Contents
Tables................................................................................................................................................3
Safety precautions.............................................................................................................................4
Warnings...........................................................................................................................................4
Notice................................................................................................................................................4
1 Set of components..........................................................................................................................6
2 General description........................................................................................................................7
2.1 Safety devices......................................................................................................................10
2.2 Pellets...................................................................................................................................10
3 Installation...................................................................................................................................11
3.1 Prerequisites.........................................................................................................................11
3.2 Burner installation................................................................................................................13
3.3 Powder extinguishing system..............................................................................................15
3.4 External auger......................................................................................................................15
3.5 Pellet storage........................................................................................................................16
3.6 Electrical connections..........................................................................................................16
3.7 External inverters.................................................................................................................17
3.8 Internet module....................................................................................................................17
3.9 Initial start-up.......................................................................................................................17
4 Optional components...................................................................................................................18
4.1 Error output..........................................................................................................................18
4.2 Flue gas fan..........................................................................................................................18
Burner setup...............................................................................................................................19
Inverter setup.............................................................................................................................19
4.3 Oxygen sensor......................................................................................................................20
4.4 Ash removal system.............................................................................................................20
4.5 External boiler temperature sensor (TMP1 or X23)............................................................21
4.6 External boiler pressure sensor (TMP1 or X23)..................................................................22
5 Operation and service..................................................................................................................23
5.1 User interface.......................................................................................................................23
5.2 Starting and stopping...........................................................................................................24
5.3 Fuel refilling.........................................................................................................................24
5.4 Status and parameters..........................................................................................................24
5.5 Regular maintenance............................................................................................................32
6 Annex 1 Electrical connections...................................................................................................33
6.1 Fuses....................................................................................................................................35
7 Warranty.......................................................................................................................................35
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Tables
Table 1 Technical data of burner.................................................................................................................. 7
Table 2 List of main components................................................................................................................. 9
Table 3 Pellets' key data............................................................................................................................. 10
Table 4 Measurements of openings.......................................................................................................... 11
Table 5 Connectors..................................................................................................................................... 16
Table 6 PAR50 values................................................................................................................................. 18
Table 7 PAR66 and PAR67 set-up...............................................................................................................20
Table 8 Summary of burner statuses......................................................................................................... 25
Table 9 List of tests in TESTING status....................................................................................................... 26
Table 10 CLEANING parameters................................................................................................................. 26
Table 11 LOADING parameters and timing............................................................................................27
Table 12 IGNITION parameters and timing................................................................................................ 27
Table 13 PRE-BURN parameters................................................................................................................ 28
Table 14 HEAT UP parameters................................................................................................................... 28
Table 15 HOLD FLAME parameters............................................................................................................30
Table 16 END BURN parameters................................................................................................................31
Table 17 END BLOW parameters................................................................................................................ 31
PV500a pellet burner
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Safety precautions





Do not start the burner before it is connected to the boiler and the boiler is connected to the
chimney.
It is recommended to wear a respirator while handling pellets.
The boiler room where the burner is installed must fulfil all rules and recommendations given by
authorities.
All electrical connections must be done by trained professionals.
No flammable materials must be stored near the burner.
Warnings




Changing the construction of the burner without written permission from the manufacturer is
forbidden.
Use only spare parts provided or approved by the manufacturer in order to avoid any damage to
the burner and dangers resulting from it.
Welding is allowed only after disconnecting the burner from electric supply. The circuit board
must be removed from the burner.
Do not open any boiler door while the burner is in operation.
Notice
Manufacturer of burner has right to make changes in construction of burner and its firmware.
Burner corresponds to following directives and standards:
Directive 2004/108/EC
Directive 2006/95/EC
Directive 2001/95/EC
Directive 2006/42/EC
EN 15270 2008
EN 230 2005
EN 60370-2-5 2002
Pellet burner PV 500a
No
Year of production
2019
Electrical supply
230V
Max heat input
560kW
Emission class
5
Noise emission
52dB
Power consumption at standby 7 W
Manufacturer: Pelltech OÜ, Sära tee 3, Peetri, Estonia
PV500a pellet burner
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PV500a pellet burner
1
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Set of components
1
3
1. Burner with burning chamber
2. Bracket 2 pcs
3. Hose 76mm
PV500a pellet burner
2
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General description
PV500a is a burner of wooden pellets (sawdust granules) that is intended for heating of the industrial
and public buildings. Only 6 or 8mm wooden pellets can be used to run this burner. You cannot use any
other form of fuel. Unique design of the burning chamber allows using industrial pellets run the burner.
The construction allows burner to be used with different boilers: liquid fuel, solid fuel and universal
boilers. The burner is connected to the boiler by using a connection plate.
The burner is equipped with a melting hose, extinguishing system and auxiliary battery for protection
against back-burning. Main technical data is gicen in Table 1 and Figure 1.
Table 1 Technical data of burner
Size
Unit
Value
L total length
L1 housing length
L2 burning chamber length
⌀D1 internal feeder’s tube diameter
H1 total height
H2 burning chamber height
W1 burner housing width
W2 burning chamber width
Mass(neto)
Maximum fuel consumption
Maximum amount of fluegases(200ºC)
Nominal power
Minimal power
Noise level
Emission class (EN 15279)
Operating temperature
Supply voltage
Electrical power at ignition
Average electrical power
Electrical power at standby
mm
mm
mm
mm
mm
mm
mm
mm
kg
Kg/h
M3/h
kW
kW
dB
o
C
VAC
W
W
W
1203
595
600
80
395
457
606
528
165
104
1400
500
160
58
5
0 - 60
400V – 3 f
800
50 – 80
7
Figure 1 Main measurements of burner
PV500a pellet burner
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Figure 2 Main components of burner
PV500a pellet burner
Nr
1
2
3
4
5
Name
Back wall fire brick
Arc fire bricks 6pcs
Side fire bricks 4pcs
Burning chamber
Grates 2+3pcs
6
7
Igniter 2pcs
Internal feeder spiral
8
Secondary fan
9
Feeder motors
10
11
12
13
14
15
16
17
Burner’s socket
User interface
User interface screen
Air box
Fixating flange
Flame sensor
Powder
extinguishing system
Fuel level sensor
18
Internet module
19
Backup battery 2pcs
20
21
22
Linear motor
Controller board
Primary fan
23
Burners input tube
Table 2 List of main components
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Description
To cover back side of burning chamber.
To cover the top of burning chamber.
To cover the sides of burning chamber.
Place of gasification and burning of pellets.
Moving grates to remove ash from the burning chamber. 2 grates with
smaller hole are placed before 3 grates with bigger holes.
Electrical heating element to ignite pellets.
Transports pellets to the burning chamber. The feeder is connected to
feeder motor with little slack. It prolongs motor and feeder lifetime. Do not
over tighten the feeder connection.
Blows burning air into burning chamber according to burner’s actual
power.
Rotates internal feed screws. The feeder is connected to feeder motor with
little slack in order to avoid the auger get stuck.
To internal and external electrical connections.
Enable to navigate in burner menus and change parameter values.
4-row LCD screen to move in menus, set up and change parameter values.
To control air input and fixate burner to boiler’s door.
To adapt fixation of burning chamber to boiler’s door.
Optical sensor (photocell) to detect flame in burning chamber.
To fast extinguishing of fire in feeder’s tube.
Optical sensor, which signal starts external auger. Sensor consists of
sender – receiver pair.
Gives possibility to observe and control the functioning of the burner over
the internet.
Enables to complete the burning procedure if mains supply lost. It is a
safety measure against back-burning and takes approx. 30min.
Moves grates in order to remove ash from burning chamber.
Controls the functioning of the burner.
Blows burning air into burning chamber according to burner’s actual
power.
To be connected via hose with external auger. Supplies burner with pellets.
PV500a pellet burner
2.1
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Safety devices
The 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. There are several
reasons for such changes.
In order to secure operational and fire safety the burner PV500a is equipped with following safety
devices:

Back up batteries. Enable to safely empty the pellets inside the burners internal tube into the
burning chamber in case of unexpected power outage.
Melting hose. The external auger is connected to the burner with a special hose (Ø 76mm), which is
made from easily melding polyurethane material that interrupts when back-burning takes place.
Such measurement avoids entrance of the flame from the burner into external auger and pellets
Powder extinguishing system. Enables to extinguish the fire inside the burner internal tube by filling
it with extinguishing powder when the burner has overheated or burned back due to some fault.


2.2
Pellets
Wooden pellets or saw dust granules are concentrated and homogenized wooden fuel made from
sawdust and cutter shavings. Pellets are pressed with high temperature. No extra materials are added,
pellets are held together by a natural ingredient found in wood – lignin. Pellets are neutral, renewable
fuel. Its burning doesn’t spoil CO2 balance in the atmosphere. Not only premium but also the industrial
pellets can be used in PV500a. Pellets must be stored in a dry and ventilated room. Some key data for
industrial and premium wooden pellets are given in Table 3.
Premium pellets
Industrial pellets
Raw material
Stem wood, wood processing
industry residues
+ whole trees, bark, logging
residues
Calorific value
Volume wight
Volume of 1 ton pellet
Diameter
Length
Moisture content
Ash content
To replace 1000 l light oil
4700-5100 kWh/ton
ca 650-670 kg/m3
1.5-1.6 m3
6-10 mm
3-5 x diameeter
8-10 %
ca 0,5%
ca 2 tons or 3 m3
ca 4700 kWh/ton
>675 kg/ m3
ca 1.5 m3
6-12 mm
ca 4mm
ca 5 %
ca 2%
ca 2 tons or 3 m3
Table 3 Pellets’ key data
PV500a pellet burner
3
3.1
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Installation
Prerequisites
In order to install the burner, the boiler must meet the following requirements:
 It is recommended to use three pass boilers.
 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 together with the burner, then extra hinges must be mounted.
 The boiler must be positioned in a way that there is enough space for cleaning the burner, the
boiler, the smoke pipe and removing the ash.
 The burning chamber must not touch the bottom of the boilers furnace (min 10cm distance
needed).
 To ensure negative pressure in the furnace, a flue gas fan should be installed.
 Boiler room must provide constant air supply of 500 m³ per hour (ca. 400 cm2 air inlet opening).
 The boiler room where the burner is installed must fulfil all rules and recommendations given by
local authorities.
In order to install the burner to the boiler door, there must be mounting holes as shown below.
Note: If the burner is installed to the boiler, the door or the installation flange´s thickness should be 814mm.
Dimension
⌀D hole for burning chamber neck
⌀D1 flange bolt ring diameter
⌀D2 bolt holes
Bolt hole offset angle
Angle between bolt holes
Table 4 Measurements of openings
Figure 3 Boiler door mounting
opening when standing in front of
the boiler
Unit
Value
mm
mm
mm
deg
deg
355
400
13
15
60
PV500a pellet burner
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Boiler firebox depth L (Figure 4)
must be at least 3,5 times longer
than the burner’s burning chamber.
The minimal length of the firebox L
has to be 2200 mm. The height of
firebox must leave at least 100 mm
(H1) for ash below burning
chamber.
Figure 4 Firebox depth
Minimum dimensions:
L1 ≥700mm
H ≥700mm
Pellet burners need regular cleaning and therefore boiler construction must allow easy opening of
boiler’s door without removing the burner. The minimum size of opening in boiler’s door depends on the
position of door hinges. Figure 5 below illustrates the situation. Point C is critical point. In order to keep
door width minimum and boiler’s door opening small, a double hinge solution can be used. As double
hinges add another degree of moving-freedom, door must be fastened on both sides. Slide-out doors
with guide rails is also an option.
Figure 5 Burner has
to come off from
boiler
Double hinges
PV500a pellet burner
3.2
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Burner installation
NR.1 Connect the flange with M12
bolts to the boilers door. Bolt
length should be chosen according
to the doors thickness.
NR.2 Connect burning chamber to
the flange with M12x50 bolts and
M12x40 long nuts as shown on
the picture.
Figure 6
NR.3 Attach the outer part of the
burner to the flange with five
M12x70 bolts.
Figure 7
PV500a pellet burner
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Check igniters positioning in the
burning chamber. Igniters ends
have to be in same level with their
holders housings (Figure 8).
Igniters have not to be in direct
touch with flame or pellets. If so,
igniters will burn out quite quickly
Figure 8
Figure 9
Place the grates back to the
burning chamber starting from the
lower ones and working upwards.
Keep in mind to put the small and
larger grate in steps between each
level, so that the common side of
the grates won’t align between
levels. Last level of grates have to
be mounted on it’s holder, slided
into position and fixed from
behind with M10 butterfly nuts
(Figure 10).
Finally install the bricks by starting
with the back wall bricks, next
install the side bricks and finish
the assembly with the arc bricks.
Figure 10
PV500a pellet burner
3.3
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Powder extinguishing system
All PV500a burners are equiped with powder extinguishing system. System is autonomous and only
requires removing the safety latch. NB! Before activating the system please read the user manual.
Activating the system before reading the manual is forbiden and could result in an
accidental opening of the extinguisher !!!
3.4
External auger
The external auger transports pellets from the pellet container to the burner. The auger is controlled by
burner. The auger is connected to the burner with a special hose (∅ 76mm), which is made from easily
melting polyurethane material that melts when back-burning takes place. The hose acts as a safety
measure against back-burning. PV500a pellet burner´s fuel consumption at full power is about 97 - 107
kg of pellets per hour (1,65 kg per minute ). External auger´s productivity must be at least 200kg of
pellets per hour. The auger can be fixed to the storage or a ceiling depending on the conditions at the
installation site.
Requirements for auger installation:
• The raising angle of the external auger must not exceed 45°.
• The end of the exit tube of the auger and the input of the burner must not be aligned. The
recommended minimal horizontal distance is 20cm.
• The distance between the input of the burner and the exit tube of the external auger must be at
least 60cm vertically – recommended distance is 80-200cm.
• Hose between auger and burner must be strait and stressed and not be bended through,
otherwise pellets may block the auger and interrupt burner’s normal work. Falling angle must me
between 65° and 85°.
All critical requirements to installation of external auger are depicted in Figure 11.
>20cm
>65 o
max45 o
Figure 11 External auger installation
>60cm
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3.5
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Pellet storage
Pellets must be stored in a dry and ventilated room that is separated from the boiler room. A tailor made
silo for particular storage is recommended. All safety regulation must be taken into consideration
according to the local laws. It is recommended to wear a respirator when handling pellets. Refilling must
be carried out before the storage runs empty.
3.6
Electrical connections
Following connections must be done by the electrical installer:
 1-phase supply and boiler’s thermostat to socket X11.
 3-phase supply to socket X12
 External auger to socket X14
Burner gets its main supply from 230V single phase supply (socket X11), but also needs 400V 3-phase to
socket X12 to run inverters and augers. Boiler should be equipped with thermostat or external switch
what has to be connected to pins T1 and T2 in 7- pole plug X11 for turning on/off the pellet burner. Auger
motors contactors are equipped with motor thermal protection, which prevent motor from overheating.
As soon as the nominal current of the sensor set-point is exceeded, the relay detects this variation and
the output relay cuts off the power to the motor. Burner can be equipped with optional lambda sensor. It
provides efficient control for optimal performance concentrating emissions and burning efficiency.
Marking
Description
Color
Data
X11
Power input
Black/Brown
230V 16A
X12
Power input
Black
3x400V 4A
X13
Safety circuit
White
X14
External auger 1
Black
0,55kW 1,6A
X15
External auger 2
Black
0,55kW 1,6A
X16
Secondary fan
White
0,15kW 0,65A
X17
Süütepulgad
Black
2x500W 2,2A
X20
External inverter
Brown
X21
Fluegas fan
White
X22
Modbus
Brown
X23
Lambda probe/temperature sensor
Green
X24
Silo sensors
Green
X25
Ash removal 2x1-phase
White
X26
Primary fan
White
0,15kW 0,65A
X29
Ash removal 3-phase
Black
0,55kW 1,6A
X30
UPS input
Black
Table 5 Connectors
3x240V 0,75kW max 4A
PV500a pellet burner
3.7
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External inverters
Flue gas fan can be controlled by external inverter. Following configuration must be made:
•
•
Inverter must use 0-10V speed signal.
“Forward” command must use sink logic (0V signal starts fan).
Before connecting the external inverter pleas look into the connection diagram.
3.8
Internet module
Every PV500a burner has an internet module in standard equipment. It is located next to the burner
controller under the red cover. The module itself is connected to the MOD1 connector, located on the
controller. For the internet module to work, it has to be connected to the internet with a CAT5 cable. To
observe and control the burner, you have to login in to the page: „cloud.pelltech.eu”. Login data can be
found on the module. To get more info about the internet module, please read the instruction manual or
contact your local reseller.
3.9
Initial start-up
Prior to the initial start-up of the burner make sure that:
•
•
•
•
•
•
The burner is connected to the boiler.
The boiler thermostat is installed and functioning properly.
The external auger of the burner is installed and connected to the burner.
The smoke duct is connected to the chimney, the dampers for smoke gases are open and there is
sufficient draught. When the burner is operating, the negative pressure inside the furnace must
stay between 5-20 Pa.
Powder extinguishing system is activated. (Please read the instruction manual!!!).
Phase (L) and neutral (N) wires in power cable are connected properly.
PV500a pellet burner
4
4.1
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Optional components
Error output
PV500a burner has built in error output what gives 230 VAC tension (NO) to 7-pole socket’s S3 connector
or interrupts it (NC) if burner delivers any error message (E16 FLAME, E48 BATTERY,E24 IGNITION etc).
Device (motor, modem etc) up to 5A@230VAC can be connected to this output. PAR50 defines wether
error output is closed or open during error appearance.
PAR50 value
1
2
Description
Normaly open. Will switch on contacts in case of error.
Normaly closed. Will switch off contacts in case of error.
Table 6 PAR50 values
4.2
Flue gas fan
The burner needs stable under-pressure in burning chamber for its correct operation. Simplest way to
assure this is to use the flue gas fan between boiler and chimney. With flue gas fan the burner can control
and hold constant under-pressure. In order to control flue gas the PAR60 value has to be set to”2”
Inverter. Selected flue gas fan must provide transmission of the maximum flue gas amount and exceed
the pressure provided by boiler, ash cyclone and chimney. The flue gas capacity for burned pellets can be
calculated by simplified formula.
V – Capacity range in m³/h
P – Burner max power in kW
Tfg – Flue gas absolute temperature in K
Troom - Room absolute temperature in K
λ (lambda) – Excess air ratio
PV burners are designed to work at lambda values 1.2...1.5 - for calculations choose value of 1.5.
Flue gas fan must be installed between boiler and chimney. If ash cyclone is used then flue gas fan must
be installed between ash cyclone and chimney to avoid overpressure in cyclone and smoke leakage.
PV500a pellet burner
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Burner setup
Depending on burner’s configuration (weather inverter included or not) the electrical connections may
be different. In case the frequency inverter has already been installed in factory to the burner, the flue
gas fan can be directly connected to the burner through connector X21. Fan must be connected to burner
with 3-wire cable (3x1. 5mm²). Internal inverter output is 3 x 240V. Flue gas fan motor has to be
connected as delta.
In case the burner is ordered without Flue gas inverter, the external inverter for flue gas fan can be used.
Inverter must be selected according to fan motor’s parameters and available power supply. The inverter
must be switched to sink logic (negative common).
To connect the external inverter with burner there is connector X20 with 3 output signals:
•
•
•
T1 - burner DC common (ground), must be connected with external inverter input common.
S3 – inverters “run” command, must be connected with F (forward) pin on inverter input. Burner
will connect this pin to ground when fan must run.
B4 – 0… 10V output for fan speed, must be connected with inverter analog input.
Inverter setup
Inverter parameters are set up at factory for automatic control. To test flue gas fan manually:
1. Press Easy button on inverter
2. Press dial button and change settings :
a.
CN0D “0”
b.
FN0D “0”
c.
F127 “0”
PV500a pellet burner
4.3
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Oxygen sensor
To use the oxygen sensor for measuring the oxygen levels in the flue gases, two parameters have to be
adjusted in the parameters menu: PAR66 and PAR67.
Parameter
Nr
Description
Unit
Name
Value
Def
Min
Max
PAR66
OXYGEN TYPE
0 – No sensor
1 – 4…20mA = 0…25% oxygen value
2 – 4…20mA = 0…20% oxygen value
3 – Oxygen value from boiler controller
-
0
0
3
PAR67
OXYGEN SET
Oxygen value setpoint
%
5,6
3,0
10,0
Table 7 PAR66 and PAR67 set-up
For lambda sensor EP0006, the PAR66 value has to be set to “1”. Some third party oxygen amount
sensors use 4…20mA output for 0…20% oxygen. In this case, value “2” must be selected.
If PAR66 is set to “0” (no sensor), secondary fan is driven by air table set in PAR31 – PAR36. Secondary fan
also switches back to air table if oxygen level reading is below 1.5% or over 19%. Oxygen sensor should
be placed into smoke tubing after the boiler. Placement has to be chosen so that the turbulance of the
gases is minimal in that place. That means that it isn’t recommended to place the sensor after tight turns
or other measuring equipment.
Oxygen level can be seen in INFO-menu next to pressure reading. The value on the screen must be
divided by 10 to get the real value. For example “O2=113” means oxygen level value 11.3%.
4.4
Ash removal system
The burner is capable to control boilers ash removal auger and scrapes. To do that burner has a 3phase or
a 1 phase output connectors where you can connect the ash removal system motors. Connector X29 has
one motor 3 phase output and X25 is able to control two 1 phase motors.
PV500a pellet burner
4.5
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External boiler temperature sensor (TMP1 or X23)
External temperature sensor enables the burner to maintain constant boiler’s water temperature. For
that external temperature sensor has to be installed to relevant place on boiler and external sensor to be
connected to connector TMP1 or X23. In parameters menu PAR53 value has to be chosen “1”.
When temperature holding status is activated, then burner will change its power according to water
temperature and speed of temperature changing. Burner starts to change its power when BURNING
status has lasted longer than set in PAR15. Power is changed according to next parameters: PAR 17
defines the time between power raises, PAR 18 defines the time between power lowering.
Following actions must be done to enable temperature hold mode (THM):
1. Mount external temperature sensor to boiler according to boiler manufacturer instructions.
2. Connect the sensor to TMP1 or X23 connector..
3. Choose PAR53 value (sensor type) according to sensor type. Type table can be found in software
manual.
4. Set requested temperature – PAR54. It should be lower than boiler thermostat temperature.
Otherwise the boiler thermostat would force the burner to turn off before reaching PAR54 value.
5. Optionally PAR55 - the hysteresis of requested temperature can be changed. THM activates if
PAR53 value is larger than “0” and BURNING status has lasted longer than set in PAR15 (typically
30min). The burner will change its output power according to current measured temperature and
the rate of temperature change.
Temperature sensor could be PT100, sensor with mA output or a sensor provided by the burner
manufacturer. Different sensors need different hardware that can be selected with JP1 and JP2.
Configuration for sensors is as followed:
PT100
PV500a pellet burner
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Pelltech’s sensor from TMP1
Sensor with mA output
4.6
External boiler pressure sensor (TMP1 or X23)
External pressure sensor enables the burner to maintain constant pressure in boiler. For that external
pressure sensor has to be installed to relevant place on boiler and external sensor to be connected to
connector TMP1 or X23. In parameters menu PAR53 value has to be chosen larger than “1o”.
When pressure holding status is activated, then burner will change its power according to boiler pressure
and speed of pressure changing. Burner starts to change its power when BURNING status has lasted
longer than set in PAR15. Power is changed according to next parameters: PAR 17 defines the time
between power raises, PAR 18 defines the time between power lowering.
Following actions must be done to enable pressure hold mode (PHM):
1. Mount external temperature sensor to boiler according to boiler manufacturer instructions.
2. Connect the sensor to TMP1 or X23 connector.
3. Choose PAR53 value (sensor type) according to sensor type. Type table can be found in software
manual.
4. Set requested pressure – PAR54. It should be lower than boiler pressure switch level, otherwise
the boiler pressure switch would force the burner to turn off before reaching PAR54 value.
5. Optionally PAR55 - the hysteresis of requested pressure can be changed. PHM activates if PAR53
value is larger than “10” and BURNING status has lasted longer than set in PAR15 (typically
30min). The burner will change its output power according to current measured pressure and the
rate of pressure change.
PV500a pellet burner
5
5.1
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Operation and service
User interface
The burner is controlled by user interface on the front panel. LCD screen (1) displays settings menu, event
log and actual statuses 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. Green LED (6) indicates existence of fuel in the
burner. To move in menus, use up and down (↑↓) buttons, to change parameter, press OK, to go back to
STATUS menu press left button. On Figure 12 are described additional parts on the burner cover.
1. 4-row LCD display.
2. Yellow LED, indicates presence of flame in the
burning chamber.
3. Buttons
4. Orange burner operation light, indicates
delivery of the signal from the boiler’s
thermostat. Red light indicates that safety
circuit is opened.
5. Red burner on/off switch can be used to turned
the Burners working command on/off.
6. Green LED, indicates existence of the fuel in the
burner.
7. Internet module cable (if module used).
Figure 12 User interface
PV500a pellet burner
5.2
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Starting and stopping
To turn on the burner, turn on the boiler main switch. If burner displays STOPPED, then go to main menu
and change parameter BURNER from OFF to ON. The display shows WAITING. Now turn boiler
thermostat to desired temperature. The burner will go to TESTING, then CLEANING and then to
LOADING-state. If this is the first run, external auger needs to fill up with pellets. It may take as long as
20minutes.
To stop the burner, set BURNER from ON to OFF in main menu. Now the burner will burn all pellets in
burning chamber and turn safely to standby.
STATUS menu displays the changes:
BURNING → END BURN → END BLOW → STOPPED
The stopping procedure may take up to 30 minutes.
Attention! If necessary, the burners working command can be switched from ON to OFF with the switch
on the burner cover.
Caution! Do not turn off mains power to terminate burning process. 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 switching off main power.
5.3
Fuel refilling
Fuel container has to be refilled before its runs out. The fuel can be added any time to container. If
container runs out before refilling, refill it and restart the burner. The start-up takes now longer about 20
minutes, because external auger has to be filled with pellets like on initial start-up. Turn burner from
BURNER menu ON. Vice versa the “E04 PELLETS” error is displayed, because loading time is exceeded.
5.4
Status and parameters
PV500a pellet burner operates in many different states, which are called “Status”. Log screen STATUS
menu displays last and actual events (burner statuses) and their duration. Burner changes its statuses
based on received input signals from sensors and values set by user. The statuses in typical working order
of cycles are given in Table 8. The duration of all actions are in form mm:ss (’m’ in the middle) or hh:mm
(’h’ in the middle) or dd:hh (‘d’ in the middle). For example: ’IGNITING 01m25“means the burner ignition
state lasted 1 minute and 25 second.
Lower row of the log shows burner’s current state. To reach the lower row, press the “down”(↓) button,
until you reach the lower row with current state. The duration of current state updates every second or
every minute. Changed data blinks.
PV500a pellet burner
p 25/36
Status
Short description
WAITING
Waiting when boiler’s thermostat switches on.
TESTING
Boiler’s thermostat is switched on, testing the battery, fans, feeder and draught in
progress.
CLEANING
Ash removing from burning chamber.
LOADING
Loading pellets with auger into burner and by feeder into burning chamber.
IGNITING
Igniter is turned on, pellets are ignited.
PRE-BURN
Flame is recognized, small amount of pellets are added by feeder auger.
HEAT UP
Burning chamber ceramic stones are heated slowly up.
BURNING
Normal burning operation.
SLOW DOWN
Burner is slowly dropping it’s power.
HOLD FLAME
Thermostat is switched off, small flame is held alive.
END BURN
Thermostat is switched off, feeder is burned up.
END BLOW
Pellet coals in burning chamber are burnt, flame has disappeared.
WAITING
Burner waits when boiler’s thermostat switches on..
Table 8 Summary of burner statuses
At WAITING status, the burner waits for boiler’s thermostat switching on. There is no time limit for
WAITING status. Only feeder auger is working periodically at WAITING status and makes works for one
second after every 2 minutes. With this feeder augers spiral cleans feeder’s tube from wastes.
When boilers thermostat switches on, burner will go to TESTING.
At TESTING status, burner‘s integrity and important device functioning are checked. List of tests is given
in Table 9 .
PV500a pellet burner
PAR Nr
PAR name
p 26/36
Test name
Test conditions
-
Battery voltage
Battery charging is turned OFF and feeder auger is
turned ON. Battery voltage must be greater than
23,63V.
-
Draft
Draft ΔPa >40Pa , when comparing draft before and
after testing.
PAR69
OXYGEN
TEST
Oxygen value testing
Oxygen value must be higher than PAR69 value.
väärtus
PAR3
FAN@
Primary fan speed
Primary fan speed must be higher than PAR3 – 2.
PAR3
FAN@
Secondary fan speed
Secondary fan speed must be higher than PAR3 – 2.
Table 9 List of tests in TESTING status
At CLEANING status, the linear motor (actuator) moves the grates and pushes the ash and residues out of
burning chamber.
The CLEANING cycle might be divided into 2 steps:
1. Grates are pulled fully into the burning chamber’s burner side.
2. Grates are pushed fully out to end of boiler’s side.
3. Grate are pulled into the starting position
PAR Nr
PAR name
Value
Unit
PAR description
PAR49
CLEANING TIME
1…14
sek
Grate movement outwards must last longer than
defined in this parameter, if it last shorter, the
cleaning cycle is repeated.
PAR48
CLEANING CYCLE
0...250
min
Time between two cleaning cycles. If this time is
doubled, the burner will make an emergency
cleaning, otherwise the cleaning takes place at next
startup.
PAR47
GRATES CURRENT
0.2..6
A
Maximum current that the linears can draw from the
power supply. If this level is exceeded, the cleaning
cycle will be started again.
Table 10 CLEANING parameters
At the LOADING status, external auger is turned on. When pellet level in the burner reaches to level
sensors, feeder auger is started. Feeder auger loads necessary amount of fuel needed for ignition into
burning chamber. Anount of fuel loaded is measured by counting the feeders working time. LOADING
cycle will end when feeder has worked the time defined in PAR24.
PV500a pellet burner
PAR Nr.
Parameter name
PAR24
p 27/36
Default
value
Unit
Comment
LOADING FEED
35
sec
Needed feeder working time to load pellets into
burning chamber. Depends on burner model.
PAR25
LOADING 2 FEED
5
sec
Feeder working time in second loading.
-
Max loading time
5
min
Feeder auger’s maximum regular loading time.
-
First loading time
after manual start.
20
min
Feeder auger’s maximum loading time after manual
start or error.
-
Auger start
2,5
sec
Auger start delay if no fuel in burner.
PAR82
AUGER OFF
2,5
sec
Auger stop delay if fuel in burner.
-
Feeder start
1
sec
Feeder start delay when fuel in burner.
-
Feeder stop
8
sec
Feeder working time without pellets before stoping.
Table 11 LOADING parameters and timing
In LOADING state the auger holds permanent fuel level in burner pellet inlet. Depengin on the level
sensors signal, the auger is switched on and off. Feeder’s work also depends on level sensors. Maximum
loading time is limited to 20 minutes after first start or error, because long auger systems need some time
to fill up. In next loadings, maximum time is limited to 5 minutes. If maximum loading time is exceeded
and silo selection function is used, the burner will switch loading over to the second auger. In single silo
system, error E04 PELLETS is displayed.
At IGNITING cycle the igniter is heated up and fan blows hot air on pellets in burning chamber. Hot air
ignites pellets. Igniter is working periodically at ignition time in order to avoid its overheating.
Igniter is pre-heated already in the end of loading cycle, 20 seconds before the loading feed end. If the
igniter has been turned on for more than 1 minute at loading time, the it will be turned off.
Par Nr.
Parameter name
Default
value
Unit
PAR8
FAN@IGNITING
20
rps
Primary fan speed at ignition.
PAR39
FAN2 MIN
7
rps
Secondary fan speed at ignition.
PAR85
IGNITION TIME
60
%
Igniter power at ignition.
-
Maks. süütamise aeg
254
sec
Maximum ignition time.
Table 12 IGNITION parameters and timing
Comment
PV500a pellet burner
p 28/36
The purpose of PRE-BURN status is to create stable flame and assure effective pellets burning procedure
after ignition. Minimum fuel amount is added periodically at pre-burn time. Fans are working with same
speed as at IGNITION.
Par Nr.
Parameter name
Default
value
Unit
PAR8
FAN@IGNITING
20
rps
Primary fan speed in PRE-BURN.
PAR39
FAN 2 MIN
7
rps
Secondary fan speed in PRE-BURN.
PAR41
PRE-BURN
25
sec
Length between fuel addings.
PAR42
PRE-BURN CYCLES
6
x
Fuel addings in PRE-BURN state.
1
sec
Feeder work time in each cycle.
-
Comment
Table 13 PRE-BURN parameters
HEAT UP cycle is needed to slow down heating up of the burning chamber’s ceramic stones in order to
minimize their thermal stress and thus prolong their lifetime.
PAR Nr.
Parameter name
Default
value
Unit
Comment
PAR70
HEAT UP TIME
20
min
Initial heat up time of ceramic stones.
PAR71
HEAT UP POWER
40
kW
Initial heat up power of ceramic stones.
PAR72
HEAT UP TEMP
500
⁰C
Ceramic stones heat up setpoint.
Table 14 HEAT UP parameters
When HEAT UP is in mode ON - burner stops HEAT UP cycle after heat up time set in PAR70 is exceeded.
When HEAT UP is in AUTO mode - burner stops HEAT UP cycle after time set in PAR70 is exceeded or
stone temperature is higher than set in PAR72.
BURNING is main action status in burner’s every day’s operation.
Burner can operate on 11 different fixed power levels. There are 6 main power levels, which can be
selected and adjusted. 5 virtual power levels (between main power levels) are for smoother operation –
they can't be adjusted or selected.
For every power level, the primary fan speed is fixed in PAR1...PAR6 and secondary fan speed in
PAR31...PAR36. The fan speed for virtual levels is calculated as average from previous and next main level
speed
7
6
5
4
3
2
1
p 29/36
level
Power
PV500a pellet burner
Power level can be selected in main menu. Power
level selection for burning time can be automatic
or fixed on some main level. When power level is
fixed, the power is slowly raised to selected level
and will be there until boiler thermostat switches
off.
Selected power
Par 17
Burning time
2 2 2
min
Figure 13 Burning at fixed power
Power level
In Automatic Power mode (POWER = AUTO in main menu), the operation power is selected automatically
depending on burning cycle length.
9
8
7
6
5
4
3
2
1
Max power (par 14)
OFF
Thermostat ON
New operation power
Operation power
Par 15 Par 15
Par 17
2 2 2
„Burning“
30
“Testing“
„Loading“
„Igniting“
“End burn“ „Pre-burn“
„End Blow“
„Waiting“
30
Figure 14 Burning procedure when power selection = AUTO
Par 15
„Burning“
Time(min)
PV500a pellet burner
p 30/36
level
Power
In SLOW DOWN mode, the burner power is reduced step-by-step to 1 level after boiler thermostat is
switched OFF. This mode can be used only in systems with high and stable power demand. Using SLOW
DOWN mode in systems with low thermal inertia or unstable power demand, there will be risk of system
overheating. The SLOW DOWN mode is recommended to use together with HOLD FLAME. “SLOW
DOWN” mode can be switched ON or OFF from main menu.
7
6
5
4
3
2
1
Thermostat ON
Thermostat OFF
Operation power
Par 17
Par 18
„Burn end“
„Burning“
„Slow
down“
„Burning“
„Slow down“
OR
„Hold flame“
Status/time
Figure 15 SLOW DOWN mode
The purpose of HOLD FLAME mode is to avoid burner start-up procedures i.e TESTING, CLEANING,
LOADING, IGNITING etc. every time, when burner is switched on from boiler thermostat. In HOLD FLAME
mode, minimum fuel and air amount are delivered to burning chamber. HOLD FLAME mode can be
switched on from burner main menu. When HOLD FLAME is set to AUTO, burner will turn the mode ON
or OFF depending on WAITING time:
 If WAITING (time between END BLOW and boiler thermostat switched on) is shorter than set in PAR
11, then HOLD FLAME mode will be switched on.
 If HOLD FLAME time is longer than set in PAR12, HOLD FLAME mode is switched off.
HOLD FLAME is also used as intermediate state before CLEANING or after SLOW DOWN.
PAR Nr
Parameter name
PAR10
FAN@HOLD FLAME
10
rps
Primary fan speed in HOLD FLAME state.
PAR39
FAN 2 MIN
7
rps
Secondary fan speed in HOLD FLAME state.
PAR11
HOLD FLAME ON
15
min
If waiting state has been shorter, HOLD FLAME will be
switched on.
PAR12
HOLD FLAME OFF
60
min
Maximum time when burner holds flame.
Table 15 HOLD FLAME parameters
Default
value
Unit
Comment
PV500a pellet burner
p 31/36
The END BURN cycle helps securely to stop burning procedure in burning chamber of burner. All pellets
inside the burning chamber and feeder tubes will be burnt. Amounts of pellets delivered and fan rotation
speed (power level) are same as in BURNING status. If burner goes to END BURN from other states (e. g.
HOLD FLAME), the first power level is selected. Burner works in END BURN until feeder tube is empty feeder has worked as long as described in PAR26.
PAR Nr
Parameter name
Default
value
Unit
Comment
PAR26
END BURN FEED
65
sek
Feeder working time to clean up feeder’s pipe.
-
Minimum feed
20
sek
If feeder has worked for less time and thermostat is
switched on, then burner will switch back to
BURNING.
Table 16 END BURN parameters
The END BLOW cycle is needed to burn finally all unburned pellet coals in the burning chamber. Burner
will wait for flame disappearing in burning chamber. In PAR27 is fixed the end blow time, i.e. the time
how long the fans continue to blow after flame’s disappearing.
PAR Nr
Parameter name
Default
value
Unit
PAR9
FAN@END BURN
20
rps
Primary fan speed in END BLOW.
PAR39
FAN 2 MIN
7
rps
Secondary fan speed in END BLOW.
PAR27
END BLOW TIME
2
min
Time to blow air after flame has dissapeared.
-
Max. END BLOW
time
20
min
Maximum time when flame has to dissapear in END
BLOW state.
Table 17 END BLOW parameters
Comment
PV500a pellet burner
5.5
p 32/36
Regular maintenance
The burning chamber of pellet burner PV500a is equipped with automatic self-cleaning and ash removing
systems. When system works regularly, there is no need to clean the burning chamber separately. Still the
corners and edges of the burning chamber should be monitored for ash and other deposits. If needed
cleaning must be done. Only the boiler needs regular cleaning and maintenance. Despite burner has selfcleaning ash removing system, nevertheless the ash collects under and on grates. That’s why at least
twice a heating period the grates need cleaning. The frequency of maintenance depends on quality of
pellets and intensity of heating.
To clean the burning chamber:
1. Turn the burner off by switching from main menu BURNER to OFF.
2. Let the burner cool down for at least one hour.
3. Open boilers door, to enter to burning chamber.
4. Remove upper arc fire bricks.
5. Remove grates and clean them totally up. Make sure that all holes in grate were clean.
6. Place back grates. Make sure the grate to be placed correctly to holders.
7. To end the cleaning, shut the boiler’s door and turn thermostat ot requiered temeperature and
turn burner ON.
Despite burner has self-cleaning system the boiler has to be cleaned from collected ash and nonburning residues. Manufacturer of pellet burners don’t prescribe time period between cleaning.
The ash and non-burning residues are perfect heat insulators. If burning chamber is surrounded with
ash and non-burning residues so its normal ventilation is distracted. It causes fast overheating, outburning and deformation of the burning chamber.
ATTENTION! BOILER HAS TO BE CLEANED FROM ASH AND NON-BURNING RESIDUES BEFORE THEY GET
IN TOUCH WITH BURNERS BURNING CHAMBER.
ATTENTION! DEFORMATION AND OUT-BURNING OF BURNING CHAMBER CAUSED BY CLEANING MADE
NOT IN TIME IS NOT MANUFACTURING DEFECT AND WILL NOT BE COVERED BY WARRANTY.
PV500a pellet burner
6
p 33/36
Annex 1 Electrical connections
PV500a pellet burner
p 34/36
PV500a pellet burner
6.1
Fuses
Fuse
F4
F6
F10
F20
F21
F22
F23
F24
F25
7
p 35/36
Size
6A
6A
2A
1A
1A
1A
1A
2A
2A
Device
24V DC power supply
Battery
Linear motor
Ash removal auger 1
Ash removal auger 2
Error relay and PSU
Cooling fans
Secondary fan
Primary fan
Warranty
Warranty objects in this context are pellet burner PV500a and supplied auger.
Producer gives 2 years warranty from the date of sale for the PV500a burner and supplied auger.
Warranty is valid when user had not made changes in the construction and setup of the burner.
Warranty does not cover defects caused by an accident, misuse, abuse, improper installation or
operation, lack of reasonable care, unauthorized medication, loss of parts, tampering, attempted repair
by a not authorized person, mains errors or using poor quality fuel.
Warranty is valid only if the installers memorandum is filled in and sent or brought to the office of
Pelltech OÜ Sära tee 3, Peetri, Rae vald, 75312 Harjumaa ESTONIA
Ph.. + 372 677 5277
www.pelltech.ee
info@pelltech.ee
Installers memorandum
Burner serial number:
Serial number, mark and modification
Internet module:
Cable or Wi-Fi, serial number
Boiler mark:
Manufacturer, mark, serial number
System type:
Central heating, steam, dryer, etc.
Fluegas fan:
Manufacturer, power, serial number
Fluegas fan inverter:
Internal
External
Type, size
Ash cyclon:
Yes
No
Type, size
External auger(s):
Mark, tube length, power, pitch angle
Pellet silo:
Mark, size, distance from boiler
Boiler room:
Dimensions, material
Chimney:
Material, flue diameter, height, draught in Pa with cold chimney
Air inlet hatch:
Dimensions, location(outer wall, inner wall, door)
Remarks:
Boiler installation specialities and remarks
Client: Name/ Aaddress / Phone/ e-mail
Installation date:
Installer: Name / Company name / Phone/ e-mail/ Signature
Installation protocol must be filled in web at cloud.pelltech.eu or on paper. Photo of the filled form must be sent to
siim@pelltech.eu . Without photo or filled form in internet, the warranty is void.
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