Pelltech PV 20a User manual

PV20a and PV30a pellet burners
User manual
DK9902A1

PV20a / PV30a pellet burner
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Table of content
Safety............................................................................................................................................................ 4
Warnings ...................................................................................................................................................... 4
Notice ........................................................................................................................................................... 4
Package contents.......................................................................................................................................... 6
1 Description ........................................................................................................................................... 7
Principal function.......................................................................................................................... 81.1
Safety devices............................................................................................................................... 81.2
Specification ............................................................................................................................... 101.3
Pellets ......................................................................................................................................... 101.4
2 Installation.......................................................................................................................................... 11
Requirements to the boiler and boiler room ............................................................................. 112.1
Installation of the burner to the boiler ...................................................................................... 132.2
External auger ............................................................................................................................ 152.3
Electrical connections................................................................................................................. 152.4
Initial start up ............................................................................................................................. 162.5
3 Optional components......................................................................................................................... 17
GSM modem............................................................................................................................... 173.1
Flue gas fan................................................................................................................................. 183.2
Error output................................................................................................................................ 193.3
External boiler temperature sensor TMP1................................................................................. 193.4
4 Operation and service ........................................................................................................................ 20
User interface............................................................................................................................. 204.1
Starting and stopping ................................................................................................................. 214.2
Refilling fuel................................................................................................................................ 214.3
Log description ........................................................................................................................... 214.4
Output power levels................................................................................................................... 244.5
Main menu and settings............................................................................................................. 244.6
Regular maintenance ................................................................................................................. 264.7
Replacing components ............................................................................................................... 274.8
Replacing igniter................................................................................................................. 284.8.1
Resetting safety thermostate............................................................................................. 294.8.2
Replacing fuses................................................................................................................... 294.8.3
Replacing fuel level sensors................................................................................................ 304.8.4
Replacing flame sensor....................................................................................................... 304.8.5

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Replacing fan ...................................................................................................................... 314.8.6
Replacing feeder auger motor............................................................................................ 314.8.7
Replacing battery................................................................................................................ 324.8.8
5 Status change logics ........................................................................................................................... 32
6 Status durations ................................................................................................................................. 33
7 Error messages and solutions............................................................................................................. 34
8 Annex 1 Electrical diagram ................................................................................................................. 36
9 Annex 2 Controller SBB 3.2................................................................................................................. 37
10 Annex 3 Table of parameters ......................................................................................................... 38
11 Annex 4 List of languages ............................................................................................................... 40
Warranty .................................................................................................................................................... 42
Manufacturer of pellet burners PV20a and PV30a: Pelltech OÜ
Manufacturers address: Sära tee 3, Peetri, Rae vald, 75312 Harjumaa ESTONIA
Name of product: Pellet burners PV20a and PV30a
Ph.. + 372 677 5277
www.pelltech.eu
[email protected]

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Safety
Do not start the burner before it is connected to the boiler and the boiler is connected to the
chimney.
When the burner is connected to the main power supply the burner casing must always be mounted.
Always make sure that the burner is unpluged 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 fulfill 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.
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 controller must be
removed from the burner before welding.
Do not open boiler door while the burner is in operation.
Notice
Manufacturer of burners has right to make changes in construction of burner and its firmware.
Present user manual is original user manual for PV20a and PV 30a pellet burners.
Pellet burners PV20a and PV30a correspond to following standarts and directives:
EN 15270 2008
EN 61000-6-2
EN 230 2005
EN 61000-6-3
EN 60335-1
EN 55014-1
EN 60335-2-102
2004/108/EC
EN 60730-1
2006/95/EC
EN 60730-2-5
2001/95/EC
EN 61000-6-1
2006/42/EC

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Pellet burner PV 20a
No
Year of production
2014
Electrical supply
230V
Max heat input
20kW
Emission class
5
Noise emission
52dB
Power consumption at stand-by
7 W
Manufacturer: Pelltech OÜ, Sära tee 3, Peetri, Estonia
Pellet burner PV 30a
No
Year of production
2014
Electrical supply
230V
Max heat input
30kW
Emission class
5
Noise emission
52dB
Power consumption at stand-by
7 W
Manufacturer: Pelltech OÜ, Sära tee 3, Peetri, Estonia

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Package contents
The burner is shipped with following components included:
1. Grate
2. Burner
3. Brackets for hose (2x)
4. Flange
5. Ceramic seal
6. 7-pole boiler connector
7. Hose
8. External auger’s fixating chain
8

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1Description
Pellet burner PV20a/30a was originally designed as cheeper replacement burner for existing heating
systems with expensive oil burners. Both burners can also be mounted to new oil, biomass or universal
boilers. The burner is multistage type , meaning it can vary its output power according to the needs of
the heating system. Both burners have similar construction and working principles. They differ only by
size of burning chambers and maximal output capacity.
PV 20a/30a is a pellet burner that is intended to be used with 6 or 8mm diameter premium class ENPlus-
A1 wood pellets. You cannot use any other fuel to run those burners. The PV20a/30a burner is
connected to the boiler with a standart 90 mm flange (similar to oil burners).
Unique electric ignition and automatic power level control make the pellet burner using easier through
the whole year. No pilot flame is used in burning procedure.
For protection against back-burning the burner is equipped with a safety thermostat, a hose from
melting material, temperature sensor and back up battery.
Burner main components are depicted on Figure 1.
1. Burning chamber
The place where pellets are burnt. Tube is made of heat resistant
4mm steel 253MA.
2. Feeder auger
Transports pellets to the burning chamber. Delivered amount of
pellets depends on burner’s capacity. The feeder spiral is
connected to feeder motor with noticeable slack in order to
prolong motor’s and feeder’s lifetime. Do not overstrain the cap
screw of the spiral.
3. Overheat temperature
sensor
Turns off the mains and external auger, when feeder augers
temperature rises above pre-set limits.
4. Mains transformer
230/12V transformer for el. supply of controller and feeder
auger.
5. User interface buttons
Enables to move in menus and set or change burner parameters.
16
Figure 1 Burner main components

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6. User interface screen
2-row screen to display burner status and to change its settings.
7. Battery
Enables to empty feeder auger and finish burning pellets in
burning chamber when mains power is lost (blackout) or safety
thermostat has turned burner off. It takes approx. 30 minutes.
8. Sockets
For connecting the mains supply, boilers thermostate and
external auger.
9. Feeder auger motor
Rotates internal feeder in order to transport pellets to burning
chamber.
10. Fan
Blows air to burning chamber according to actual burner power
level.
11. Fuel level sensor
Optical sensor, what starts external auger. Sensor consists of
sender –receiver pair.
12. Mounting nut
M6 nut connects burning chamber to burner housing
13. Flame sensor
Optical sensor to detect flame in burning chamber.
14. Igniter
Electrical heating element what heats up the air and ignits
pellets.
15. Grate
16. Safety thermostat
Grate with air supply holes made of heat resistant 4mm steel
253MA on what pellets burn.
Turns off the mains and external auger, when feeder augers
temperature rises above limit. It is a safety measure against back-
burning.
Principal function1.1
The PV20a/30a burners are meant to be installed in a boiler and fuelled with wood pellets. The external
auger transports the pellets from a pellet container to the burner. The controller board contains a
microprocessor system that tests main safety components, monitors and regulates the burning
procedure, starts and stops the burner automatically according to the boiler temperature. A warm air
element (electrical igniter) ignites the pellets. The start procedure is designed to create a quick and
smoke free ignition.
The burner starts burning when the boiler temperature cools down and boilers thermostat switches on.
Burner runs until the pre-set maximum boiler temperature (switch-off temperature) has been reached.
After that burner stops safely burning procedure and goes to waiting (stand by) status.
Main supply interruptions (blackouts) are taken care of by the control system. After a main supply
interruption burner stops safely burning and goes to stopped status.
If there is a safety risk, the burner switches off.
Safety devices1.2
The burner has following safety devices (Figure 2) against back-burning and other dangerous situations.
1. Melting hose
2. Temperature sensor
3. Controller
4. Back up battery
5. Safety thermostat

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1.Melting hose
To avoid the reaching of fire during back-burning to external auger, a melting hose is put between
external auger and pellet burner. The hose will melt when air temperature in it’s inside reaches 100oC.
2.Temperature sensor
A temperature sensor is mounted on burners input tube. If the burner is not regularly cleaned, part of
burning gases start to move through fuel line. The sensor detects temperature rise in fuel line and shuts
down the burner when temperature inside burner exeeds 60oC. This safety device is not meant to
replace regular cleaning by the user.
3.Controller
Software supervison made by controller monitors continuously all inputs and outputs and shuts down
the operation of burner in case of abnormal condition occur. Controller has watchdog timer WDT to
reset the controller in case program lock up. It also has a brown-out detection and reset circuit to reset
the controller when power supply voltage falls below threshold. Burner makes self-testing after applying
power. Following is checked:
-Existence of feeder auger motor current (motor is turned on for a moment)
-Existence of speed signal from fan (fan is turned on for a moment)
-Voltage level on backup battery is > 11V when loaded with feeder auger motor
or last error message is displayed.
To ensure there are no explosive gases inside the boiler, the fan is ran for short duration before
loading/ignition starts.
4.Backup 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, where they burn finally with help of natural draught. Fan
rotation and all other functionalities are stopped. Battery voltage is checked allways at startup and
continuously monitored during the operation.
5.Safety thermostat
In case back-burning has reached into feeder auger, safety thermostat cuts mains power off and feeder
auger is unloaded by using battery power. Thermostat acts at 65oC and has to be reset manually.
Figure 2 Safety devices

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Specification1.3
Pellets1.4
Wood pellets or saw dust granules are concentrated and homogenized wood fuel made by pressing
dried and comminuted wooden waist like sawdust and cutter shavings. Also stem wood is used. During
pressing no extra materials are added, pellets are held together by a natural ingredient found in wood –
the lignin. Pellets are neutral, renewable fuel. Its burning doesn’t spoil CO2balance in the atmosphere.
Pellets have to be stored in a dry and ventilated room. Only premium wood pellets e.g. ENPlus-A1 can
be used in PV20a/30a burners. Table 2 provides an overview of the most important wood pellet
properties and threshold values.
Description
Unit
PV20
PV30
L total lenght
mm
540
570
L1 burner housing lenght
mm
230
230
L2 burning chamber lenght
mm
170
200
⌀D burning chanber diameter
mm
146
162
⌀D1 burning chamber neck diameter
mm
88.9
88.9
⌀D2 internal feeder inlet diameter
mm
60
60
H total height
mm
240
240
H1 burner housing height
mm
200
200
W total width
mm
220
230
W1 burner housing width
mm
205
205
Mass
kg
11.2
12.2
Burners nominal capacity
kW
20
30
Burners minimal capacity
kW
10
14
Emission class EN 15270
-
5
5
Noise level
dB
52
52
Working temperature
oC
0 - 60
0 - 60
Mains supply voltage
VAC
220-240
220-240
El. power at ignition
W
570
570
El. power, average
W
25 - 40
30 - 40
El. power at standby
W
4
4
Figure 3 Main measurements
Table 1 Burners’ main measurements
easurements

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Table 2 Wood pellets properties
Raw material
Sawdust,cutter shavings and stem wood
Calorific value
4700-5100 kWh/ton
Bulk density
ca 650-670 kg/m3
Volume of 1 ton
1.5-1.6 m3
Diameter
6-8 mm
Length
3-5 x diameter
Fines content (<3,2 mm)
<0,5%
Moisture content
8-10 %
Ash content
< 1%
Ash fusion
> 1200 oC
To replace 1000 l light oil
ca 2 tons or 3 m3
Burner, external auger and container are common system. The size and location of the pellet container
depends on the needs and possibilities of bolier room or boiler room. While choosing the pellet
container you must keep in mind that:
if the pellet container is in the same room as the boiler, then the size of the pellet container
must not exceed 500 liters (approx. 350kg).
the container must be made of fireproof materials.
the container must be positioned in a way that the raising angle of the feeding auger does not
exceed 45°. Figure 11.
the container could be closed with a cover.
2 Installation
Requirements to the boiler and boiler room2.1
In order to install the burner, the boiler must correspond to the following requirements:
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 negative pressure (less than - 5Pa)in the furnace, a flue gas fan should
be installed for the exhaust gases.
The boiler room where the burner is installed must fulfill 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 80Co, there is a risk of condensation. This
makes pitch and brakes into pieces stone chimney. In this case a stainless steel pipe should be installed
into the chimney.
Notice: It is recommended to use a flue gas analyzer for adjusting the burner. The burner must be
adjusted also when you use pellets with different quality.
Pellet burners need regular cleaning and therefore boiler construction must allow the door to be
opened without removing the burner. The minimum size of opening in boiler depends on the position of
door hinges. Figure 4 below illustrates the situation. Point C is critical.

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In order to keep door width minimum and boiler opening as small as possible, a double hinge solution
can be used. As double hinges add another degree of free movement, the boiler’s door must be
fastened on both sides. Slide-out doors with guide rails is also an option.
Boiler firebox lenght L Figure 5 must be at least 2 times longer than the length of burner’s burning
chamber (accordingly L=350 or 400 mm). Distance from the end burning chamber to firebox back wall L1
is about 180 or 200mm. The height of firebox must leave space at least 100mm (H1) for ash below
burning chamber and 100mm above burning chamber. Minimum boiler firebox dimensions for PV20a
are: L ≥350mm; H≥350mm and for PV30a L ≥400mm; H≥370mm.
The burner is mounted to boilers door using supplied oil burners mounting flange. Bolt hole circle
diameter and bolt sizes can be customized by using custom flanges. D1 and D2 given in Table 3 and Figure
6 are valid only with supplied flanges.
Figure 4 Hinge position and boiler opening size
considerations
Double hinges
Figure 5 Required measurements for firebox

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Installation of the burner to the boiler2.2
Following tools are needed to install the burner:
Spanner no. 13 for fixing the mounting flange to the boiler’s door.
Spanner no. 10 for connecting the burning chamber to burner housing.
Crosshead screwdriver for fixing the cover of the burner.
4 mm hex wrench for fixating the burner to the flange.
In order to install the burner properly, you must go through the following steps:
Measurement
Unit
Value
⌀D hole for burning chamber neck
mm
90
⌀D1 flange bolt ring diameter
mm
130..150
⌀D2 bolt holes
mm
8..9
Figure 6 Mounting holes with supplied flange for boiler door
Figure 7
Figure 8
1. Remove the cover of the burner by
loosening 4 screws of the cover. There
is no need to remove the screws
Figure 7 .
2. Remove the burning chamber
from the burner by releasing the M6
nut (Figure 8) that connects the 2
halves of the burner.
Separate the halves of the burner by
pulling the burning chamber and
slightly turning it at the same time.
Table 3 Mounting hole measurements

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3. Fix the flange (2) to boilers door (1). (Figure 9). Make sure that opening of flange and the opening of
the boiler’s door are aligned.
4. Fix the burning chamber (8) to boilers door (1). For that you need to put a ceramic seal (4) on the
narrower side of the burning chamber and then put the chamber through the door of the boiler (1) in a
way that the rearward wall of the burning chamber would lean on the door of the boiler. Fixate the
burning chamber (8) with two grub screws (10) to the flange.
Notice! The burning chamber must be mounted in a way that the burning grate will be as horizontal as
possible. The connection between the burner and the boiler must be tight in order to avoid any leakage of
flue gases.
5. Connect the housing of the burner to the burning chamber like it was done before disassembling in
step 2.
6. Fixate the halves of the burner with a M6 nut (9). The nut has to be fastened tight but not too hard.
7. Make sure the halves of the burner are connected correctly. Make sure that when looking through
the fire tube the igniter its end tip is at the same level with the reward wall. The tube of the feeder
auger must reach through its opening.
Figure 10 Right placement of igniter
2
Caution! After the installation of the burner
always make sure that the end of the igniter is
positioned through its opening and not stuck
behind the dividing wall. Figure 10.
Igniter must not be in direct touch with pellets
and flame. Vice verse it will burn out quite fast.
Figure 9

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External auger2.3
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. It acts as a safety measure against back-burning
because melts in back-burning.
External auger can be fixed to a ceiling or container depending on conditions at the site.
Figure 11 depicts correct installation of external auger. As melting hose is a safety element, it has to be
installed strictly as follows:
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.
Be sure, that:
The vertical distance between the output of external auger and burner has to be 400 –700 mm.
The horizontal distance between the output of external auger and burner has to be 100 –200 mm. It
ensures hose to be smelt when back- burning arises and fire does’nt reach to container.
The raising angle of the auger must not exceed 45° to ground. Vice verse auger doesn’t manage to
transport enough pellets.
In order pellets can freely fall into burner the falling angle must be between 50° and 85°.
Electrical connections2.4
The burner is equipped with a standard oil burner plug (under red cover on right side) 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 (Figure 11). Also is possible 4-wire connection. In both cases
connection of boiler thermostat ‘Tt’ is different. In Figure 13 there are depicted socket connection
diagrams of external auger, flue gas fan and boiler. It is important that plug has to be pushed completely
into outlet. Sides will be fixed with plastic stud.
Figure 11 External auger placement

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Notice! All electrical connections of the burner must be made by a qualified professional.
Initial start up2.5
Prior the initial start-up the burner make sure that:
•The M6 nut that connects burner’s housing and burning chamber is securely tightened.
•The neck of burning chamber fits correctly to burner’s housing.
•The grate is placed correctly into burning chamber (Figure 14). The back edge of grate has to be
against the back wall of burning chamber and fixator stub is inside the chamber.
•Igniter is not stuck behind buring chamber’s back wall and its end is on same level with end of its
holder tube and does not reach out form it. Igniter can not be in direct touch with pellets and flame.
•Boiler thermostat is installed correctly and functioning properly.
•The boiler thermostat is turned to lowest temperature.
•The external auger is connected to the burner according to Figure 11.
•The smoke duct is connected to the chimney, the dampers for smoke gases are open and
sufficient draught exists. When the burner is operating, the negative pressure inside the
boiler must stay between 4 and 6 Pa.
Boiler’s air hatches are closed and all air goes thru the boiler.
•Electrical plugs of external auger and boiler on burner’s right side are pushed fully into outlets. They
should lock with plastic stub clip.
To turn on the burner, switch on boiler’s main power switch. If STOPPED is displayed in controllers
screen press OK button on user interface and toggle down with the „down“ (↓) key to BURNER menu.
Then, press OK and „down“ (↓) key to toggle from OFF to ON then press OK to approve the change.
Press ESC to return to the STATUS display. WAITING is displayed. Now turn the boiler’s thermostat to
desired temperature. The burner will now go into TESTING mode then LOADING mode. If this is the first
5- wire
connection
Tt –Boiler thermostat
4- wire
connection
Figure 12 Thermostat connections
Figure 13 Socket connections
Tt

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run, the external auger may need up to 20 minutes to load. After the pellets are loaded the burner will
go into IGNITION mode then PRE-BURN mode then finally BURNING mode where it will remain until it
reaches the temperature by the thermostat. When it reaches this temperature the burner will go into
END BURN mode and finally END BLOW until all the pellets coals have extinguished. At that point the
burner will be in WAITING mode until the boiler calls for more heat which starts the whole process over
again.
To stop the burning, turn the boiler’s thermostat down or turn the burner OFF from the BURNER’s
menu or keep OK button down for 5 seconds.
Caution! Never turn off a working burner from the main power switch of the boiler. Do not leave the
burner unattended when it has been necessary to turn off the burner’s power while in operation.
3Optional components
GSM modem3.1
GSM modem enables to send burner error SMS messages with 7 last statuses or error message up to 5
phone numbers. If there are more error messages, then less status info rows will be sent by SMS.
Stopper of grate is inside of burning chamber
inside the camber
1
Grate has to be against the back wall
UART
2
3
GND
Tx
Rx
+5V
UART
X2-8
White (+)
X2-4
Brown (-)
Figure 14 Grate's correct placement
Figure 15 Connecting the modem
Following 3 products are needed to set up
modem:
1 –Modem signal converter cable EP0005 to be
connected between modem and UART socket
2 –Modem EP0007
3 - Modem power cable EP0001

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Modem (2) is connected according to diagram on Figure 15. Power supply cable’s white wire is
connected to motors wire (pin X2-8) and brown to X2-4. Adapter EP0005 cable is connected to modem
and to controllers UART connector. Depending on the location of the modem, extension cables may be
used.
Before inserting the SIM card to modem (Figure 16) following actions have to be done:
1. SIM card has to be activated by the mobile operator.
2. SIM card PIN code reguest must be turned off.
3. Check with mobile phone that it is possible to send SMS with this SIM card.
4. In SIM card´s phonebook must be only the numbers, where the error messages from the burner
will be sent to.
Red LED indicator
Modem status
Permanantly on
Sending message (ongoing call)
Fast interrupt sequence ( 0,5s/ 1s)
Net search/Not registred/ Turning off
Slow interrupt sequence ( 0,3s/ 3s)
Registred full service
Permanently off
Device is turned off
Flue gas fan3.2
Usage of flue gas fan improves work of heating system and optimises burning procedure. In order to
activate flue gas fan speed control, PAR30 has to be set to value “1”. In this case flue gas fan control is
proceed by controllers internal air-table, where for every power level certain amount of combustion air
is prescribed according to PAR31…PAR36. If select PAR30 “2” , the flue gas fan is switched off. Value “3”
and “4” are not applicable in this burner. Value “5” in PAR30 allows controlling fan’s speed with under-
pressure sensor what is installed to boiler or burner. Flue gas fan follows pre-set underpressure or draft
by PAR61. Control starts when pressure gets lower or rises over value set in PAR61. Product code for
compact under-pressure sensor is AP0003A. AP0003A sensor is connected to TEMP2 socket. Before
implementation the underpressure sensor has to be calibrated. To do that go to INFO menu and check
value of ΔP. It has to be close to “0” (-0,3…+0,3). If not go to PAR63 and by changing its value try to get
ΔP close to “0”.
To insert the SIM card modem has to be switched off from
supply mains. To insert the card push it into modem’s slot
as long as click is heard. To remove card it has to be
pushed as long as spring pushes card out.
To activate sending messages the PAR52 value has to be
changed from 0 to number of phones the error message
will be sent. 0 means that no messages will be sent. 2
means that message will be sent to 2 first numbers in SIM
card.
Modem has 2 indicators. Green one shows that modem is
switched on. Red one shows status of modem.
Description of modem’s statuses is described in Table 4.
.
Figure 16 SIM card insertion
Table 4 Modem values

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During calibration burner has to be at WAITING status, all doors and windows of boiler room opened,
also boiler’s door has to be opened.
Error output3.3
It is possible to connect additional devices as pump, modem etc to burner which are possible to turn on
or off when error occures. Error output’s plug is situated in upper part of controller and is marked ERR
(Figure 17). Output enables to connect to circuit up to 5A 230V devices.
PAR50 in boiler parameters menu determines if the circuit is open or closed during error. Table 5.
ERR output relay on the controller board adds various functions:
Table 5 PAR50 values
PAR50 value
Description
1
Normally open circuit. Only connected in ERROR state
2
Normally closed circuit. Only disconnected in ERROR state
3
Connected circuit in PREBURN, HEATUP, BURN and HOLD FLAME
4
Not used
5
Not used in PV20a/30a
Figure 17 Error output location
External boiler temperature sensor TMP13.4
External boiler temperature sensor enables the burner to maintain constant boiler’s water temperature.
To do that temperature sensor has to be installed to relevant place and connected to controllers plug
TMP1. In parameters menu PAR53 value has to be set more than 1.
When temperature holding state is activated, then burner will change its capacity according to water
temperature and speed of temperature changing. Burner starts to change its capacity when BURNING
status has lasted longer than set in PAR15. Capacity is changed after time set in PAR17.
Following actions must be done to enable temperature hold mode (THM):
1. Mount external temperature sensor to boiler according to boiler manufacturer instructions.
2. Disconnect burners internal overtemperature sensor from controllers TMP1 connector.
3. Connect external sensor to TMP1 connector on controller board.
4. Select PAR53 value “2” (sensor type) according to Table 6.
5. Set required temperature - PAR54. It should be lower than boiler thermostat switch off
temperature. Otherwise the boiler thermostat would force the burner to turn off before reaching
PAR54 value.
6. Optionally the hysteresis of desired temperature can be changed by PAR55.

PV20a / PV30a pellet burner
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DK9902A1 www.pelltech.eu
THM activates if PAR53 value is more than 1 and BURNING status has lasted longer than set in PAR15
(typically 30min). The burner will change its output power according to currently measured temperature
and the rate of temperature change. New power level is selected after time interval specified in PAR17.
Table 6 External temperature sensor types
PAR53
Sensor type
Temp min
Temp max
Function
0
No sensor
-
-
-
1
0..2.5V
0ºC (0.5V)
125ºC (1.75V)
Burner’s overtemperature sensor (PAR43)
2
0..2.5V
0ºC (0.5V)
125ºC (1.75V)
Boiler’s temperature control
After activating THM, following row is displayed on INFO-screen: „T=22.3/70±5↑30o“. It means:
22.3 –Actual measured temperature oC
70 –Setpoint temperature (PAR54) oC
±5 – Setpoint hysteresis (PAR55) oC
↑- Shows if actual temperature is increasing or decreasing
30o–Forecasted temperature after 10min oC
4Operation and service
User interface4.1
The burner can be controlled from the front panel on user interface Figure 18. LCD screen (1) displays
main menu, set-up menus, info menu and burner’s actual statuses and them history. Yellow LED (2)
indicates the presence of flame in burning chamber. If yellow LED blinks, the burner is out of normal
operation. Green LED (3) indicates existence of fuel in the burner. Last burner’s status can be seen on
lowest row of STATUS manu. The burner displays two last statuses or error message. To move back in
history of statuses push “up” (↑) button. There are 30 last statuses in burners memory together with
duration in hours, minutes or seconds. To change parameters use “up” or “down” (↑↓) buttons to
enter to desired menu. Confirm entrance with OK. Change with “up” or “down” (↑↓) buttons desired
parameter. To confirm the change, press OK. Press ESC button to go back to STATUS menu.The main
actions of OK and ESC buttons are described in Table 7.
Button
Button’s pressing time
Action
OK
Less than 3 seconds
Entering to sub-menu
Confirming setting (when blinks)
1. 2-row LCD display.
2. Yellow LED indicates existence of
the flame in the burning chamber.
3. Green LED indicates existence of
fuel in the burner.
4. User interface control buttons.
Figure 18 User interface front panel
Table 7 User interface buttons
actions