Dabos Prity User guide

Pellet Burner
PRITY
Instructions for installation, adjustment
and operation

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Pellet Burner
Type Prity
Instructions for installation, adjustment and operation
Technical data:
Thermal power from 10 to 35 KW
- Automatic ignition
- Automatic pellet feeder
- Automatic monitoring of the combustion process
- Modulation of thermal output according water temperature
- Input for room thermostat
- Input for tele-control GSM)
- Real time clock with two on/off timers
- Automatic restart
- Automatic cleaning
- Combustion chamber – made of 5mm heat resistant stainless steel
- Power consumption during combustion-100W
- Power Consumption during ignition- 1000W
Fuel Consumption:
- At minimal power - 2kg per hour

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- At maximal power - 7kgs per hour
- At rated power - 4.5kgs per hour
Table of contents:
1.Principle diagram
2.Safety rules
3. Instructions for installation, commissioning and safe operation.
4. Service technician guide
The Pellet Burner PRITY is produced, in full
compliance with the European and the Bulgarian
standards.

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1.Principle diagram
1.Control panel
2.Pellet inlet
3.Flange connector
4.Combustion
chamber
5.Feeder cable
6.Auger plug
7.Temperature
controller
8.On/Off
9.Fuse
10.Auger
transporter
11.Gear screw
12. Feeder cable
13.Stand
14.Heat resistant
tube

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2.Safety rules
Installation should be executed by qualified and authorized skilled people in heating and
electrical systems.
The site and correct burner installation must be chosen carefully, following the directions for
safety.
Install away from flammable objects!
Never attempt to make changes to the burner! Never use flammable liquids to ignite!
Operation and servicing of the burner must be carried by an adult familiar with the operating
conditions.
Introduction of flammable and volatile liquids in the room with a working burner is strictly
prohibited! Children should not remain unattended in the room of the combustion plant.
Safe distances:
In the burner assembly safe distance of at least 200 mm must be respected, if not place rock
wool insulation of the wall and the cladding. This distance applies to fireplaces and flue
located near material with a B and C degree of combustibility. The safety distance is doubled
if the camera is located near material with a C3 degree of combustion.
Degree of flammability
Degrees of flammability Building materials with levels of
flammability
A- non-combustible Granite, sand, concrete, ceramics and
other
B- very difficult to ignite Acuminata, izomin, wallboard, Basalt
tile, fiberglass, novodur.
C1-difficult to ignite Hardwood lumber, plywood, verazalit
and other.
C2-Normal combustibility Coniferous wood, cork tiles, rubber
flooring.
C3-Easily ignited MAP, cellulose materials, polyurethane,
polystyrene and others.
Do not overfill the fuel chamber! Fuel material used must be of a very good
quality.

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The burner is designed FOR BURNING WOOD PELLETS ONLY!
Constructive safety rules
The burner is controlled by a microprocessor. The process of ignition is being
monitored by illuminance sensor and if it does not ignite the first time,
microprocessor files a second dose of pellets and starts the ignition again. If
there is no ignition, after the second cycle, the burner goes into "ALARM"
mode. If during operation the pellets are completely consumed of the feeding
hopper, the burner goes into Stop mode and shows "ALARM".
The flexible tube for transporting the pellets is made of a special heat- resistant
material and is transparent. The customer’s access to the microprocessor
logistical module’s program is secured by a password. Only the necessary for
the normal work of the burner parameters can be accessed by the customer.
A sensor for temperature higher than 90-95ºC is placed on the feeding
tube of the burner. If during operation the temperature sensor detects a
temperature higher than 90–95ºC, the auger stops and the burner turns off.
At this time the display starts to blink – indicating ALARM. Even if the
temperature falls below 90–95ºC, the burner won’t start working again. It is
necessary the intervention of the operative staff. After fixing the error
in the normal operation, the burner starts by pressing the [STOP] and then
pressing [START] button.
3. Instructions for installation, commissioning and safe operation
The pellets are stored in a pellet hopper, where the auger tube is placed at an
angle of 45 degrees. The auger gets pellets from the hopper, dosing them and
passing them to the combustion chamber, where as a result of the combustion
process the water is heated. Combustion gases are discharged to the chimney
with the help of a blower. The work of the pellet burner is controlled by
multifunctional electronic controller.

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Connecting to the boiler
The device should be placed in a way, so there will be enough space for
cleaning, removing the soot from the burner, the boiler and the draught pipes.
The burner must be installed in the boiler outlet with the relevant isolation,
joined up with nuts or puller. The contact between the burner and the boiler
should be well tight in order to prevent gas leaks in the service room. When
installing the system, it should be in optimal horizontal position. The pipe
should be straight and the connections should be tight.
The boiler’s exhaust system chimney) should be able to supply enough draft, so
positive pressure in combustion chamber will never occur.
Connecting to the electrical network
After connecting the burner to the boiler, the technician should connect it to the
control panel and then to the electrical network.
Attention! The connection must be done by a qualified electrical technician
and there must be paid high attention to the safety grounding of the device.
Auger transporter is connected by a special plug and a switch, and it is
controlled by a special logics.
Pellet feeding
The auger transporter must be placed in a way, so that it can easily get pellets
from the pellet hopper.
The auger transporter’s cable should be plugged in the primary auger loading
provided for this purpose. For the initial filling, the auger needs to be plugged
into external power outlet 220V, until pellets begin to fall from the outlet and
then plug it back in the automatic mode plug. If the burner is connected to a
room thermostat, you must verify that the set temperature is less than that of the
environment.

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Start the burner
Check if the pump is connected to the electrical network and, if it is controlled
by a thermostat, check the thermostat, too.
You should make the necessary adjustments in temperature maximal - “switch
off” temperature and minimal – “switch on” temperature) according to customer
needs, and to check or change some parameters recommended by the
manufacturer accessed ones). All these setting should be done only by an
authorized service technician! The burner should start only if it is connected to
the boiler by a chimney, providing enough draught, electric power is present and
auger is able to supply pellets.
The burner is ready to run.
Place the ON / OFF switch to ON.
Press the [START] button.
Blowing mode is on, in which the fan is operating at 100%
The auger gets pellets from the bottom inlet and starts to transport them to the
top output .After the preset from the manufacturer) time elapses, providing
feeding with a dose of pellets for the primary ignition, the auger transport turns
off, the ignite heater turns on together with the fan - the IGNITION mode
starts.
Once the illuminance sensor in the burner detects light, the ignition heater is
stopped. That is the point when the Burning process starts.
After the preset time elapses the burner goes into BURNING mode. Upon
reaching the preset maximum temperature, the burner stops and remains in
STANDBY mode, after reaching the preset minimum temperature is
reactivated.
If during operation, the set temperature is being decreased, the burner will turn
off.
If during rest when a set temperature is being increased, the burner will turn on
and the ignite algorithm will start again. It is possible also to re-ignite by
pressing the [START] button.

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If the pellets don’t ignite, a new attempt for their burning will start
automatically.
If the sensor does not detect any flame during operation, the burner will stop and
a mode ALARM will start.
If more than few attempts for ignition appear unsuccessful, for example,
if the fuel ends, then the device turns off the normal algorithm and a mode
ALARM will start – the display light will start to blink - which is a signal for
the user that assistance is needed.
When the electrical supply stops and then restores, if burner was “on”, then it
starts automatically.
If the burner is not connected to a room thermostat, then the burner will turn on
and off upon reaching the preset minimum and maximum temperatures set by
the customer.
If the burner is connected to a room thermostat, then the burner will turn on after
room thermostat enable is received and minimal temperature in boiler is
reached.
After room thermostats disable command is given during operation the burner
will either stop or continue at low power for certain time – according parameter
settings.
GSM Tele control. The burner is supplied with tele-control input for connection
of external GSM tele-control module. The commands given can start or stop
operation of burner. The command is edge sensitive.
ADJUSTING THE BURNER
If the device does not work properly:
- check the pellets quality they must have no dust). If the burner works
correctly, the pellets on the fire-grate should be as many as the holes on the grate
will be covered.
- check the flue gases temperature 175-240ºC). If it is too high, decrease the
pellets feeding. If the temperature is too low, increase the quantity of the air
supply.
Criterion for the proper burner operation is the flame color - IT SHOULD BE
YELLOW.
If the color is dark yellow, mixed with smoke, probably the quantity of the
supplied pellets is bigger than the necessary and it should be reduced.
Opening of the air valve affects on the combusting process, the purpose is calm,
stable combustion, without a residue normally the valve is not tightly closed).
If the initial feeding dose for ignition is too big, it is possible burner “choke”,
i.e. it can not be started through activation of the thermostat once again.

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That is as a result of the fact that the initial dose of pellets is bigger than the
necessary and pellets are accumulated at the ignitable heater area.
If there are charcoals from the previous combustion, they start the burner, a
flame is registered and the burner gets in operating mode before the pellets start
burning by the ignition heater and the flame subsides from the big quantity of
fuel. The time for initial dose feeding should be reduced . Probable cause is a
change in the quality of pellets. It is recommended to use the same fuel after
setting the burner.
IMPORTANT: when adjusting the burner you will need a gauge instrument
for flue gases analysis.
BURNER MAINTENANCE
IMPORTANT! BEFORE STARTING SERVICE AND MAINTENANCE,
UNPLUG TO SHUT DOWN THE ELECTRICITY SUPPLYING !
The device for pellets burning is designed in a way that it requires minimal
maintenance.
The maintenance work directly depends on the quality and the size of the used
pellets.
Removing the ash:
During the process of wooden pellets burning, there remains about 0.5% - 1.5 %
of ash, depending on the quality of the used pellets. By experience you will
precisely notice how often you should clean the burner, depending on the size of
the combustion chamber and the type of the used fuel. The ash should be
removed from the burner and from the boiler and should be stored in a closed
box.
We recommend to clean the burner every 24 hours or depending on the
accumulation of ash, but not going over 48 hours .
-Allow the burner to cool down.
If it is necessary:
- unscrew the bolts and remove the burner from the boiler;
- remove and clean the burner’s throat;
- remove the ash under the fire-grate;
- remove the cinder over the helix and clean the outlets.
hen removing the cinder, use gloves and safety glasses
RECOMMENDED MAINTENANCE PLAN
Remove the ash and the cinder once a week or depending on the volume of the
ash tray.

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Remove and clean the burner’s throat, remove and clean the burner and screw it
to the boiler again, every 24 or 48 hours.
Periodically check the flue of the boiler and if there is congestion it should be
cleaned.
Check the burner control with a gas analysis instrument once a year.
ATTENTION! ALL SERVICES ON THE ELECTRICAL SYSTEM AND THE
BURNER MUST BE DONE BY AN AUTHORISED MANUFACTURER’S
SERVICE.
POSSIBLE TROUBLESHOOTING
The device does not work:
- check if the pellets quantity is enough ;
- check if the auger transporter works whether there is pellets feeding);
The device does not start:
- check if the burner’s electrical supply is present;
- check the safety valve in the feeding module.
ATTENTION! SWITCH OFF THE POWER SUPPLY BEFORE
OPENING THE COVER! The check must be done by a qualified electrical
technician!
- check the voltage source, check for loose connections;
- check the boiler’s thermostat if a start signal does not come from the boiler;
- if a lamp ALARM lights, remove the reason for the disturbance
-check chimney if there is enough draught.
Unsuccessful ignition
-there is not enough initial quantity of pellets
-there is a problem with the igniter.
The fuel feeding is OK but there is no fire:
- check the ignition heater;
- check the voltage supply to the ignition heater.
The feeding and the ignition are both OK but the fan does not turn on:
- check the fan engine.
- check the ignition heater;
- check the voltage supply to the ignition heater.
Wrong parameter settings or parameters mismatch
-Recover the wrong parameters or perform factory reset

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Technical maintenance
ADJUSTING THE CONTROLLING LOGISTICAL MODULE
Mode”Start” - "Start" is displayed
1. Cleaning is activated for a certain time Parameter # 61 - "Blowing"
2. Feeding with an initial dose of pellets Parameter#02-“Start Feed”-the fan
is turned off, the heater is turned off.
3. The heater and the fan are turned on and set at desired duty%
Parameter#04-“Start Fan”)
4. Wait for the iluminance sensor to detect stable flame at value above
Parameter#05-“Start Flame”) for at least 30 seconds.
5. If the pellets do not ignite during the preset time Parameter#03”Start
Max Time”), new attempt for ignition will starts, but with +1/2 dose of
pellets.
6. After stable flame is detected, the device goes into mode “Ignition“.
7. If after the second attempt the ignition is unsuccessful, a mode “Alarm”
will start.
Mode “ Ignition”-the inscription “Ignition “ is displayed
1. Regardless of the temperature in the burner and the settings - this phase
should be completed.
2. Duration of the phase Parameter#08-“Ignition Max Time”)
3. Pellet feeding Parameter#06”Ingition Auger Run”) with a pause
Parameter#07-“Igniter Auger Pause”)
4. The fan operates at value Parameter#09-“Fan Ignition”

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5. The ignition heater operates for about 1 minute.
6. The flame is detected, if the flame intensity goes below the extinction
burner level, the device goes into mode “Start”.
7. After the preset time elapses Parameter#08”IgnitionMax Time) the
device goes into mode ”Burning”.
Mode”Burning”-the inscription “Burning” is displayed
1. After the ignition, within 15 minutes, the power of the burner increases
gradually from Level1 to Level 3 preset maximum level 3)
2. The burner operates at maximum level upon reaching the maximum
temperature – Tmax Tmax=75ºC) within certain temperature range
dTreg Min-Max =6ºC)
3. When the burner reaches the Tmax–dTreg MinMax , the burner goes
into Level 2
4. If the burner exceeds the Tmax– dTreg MinMax /2), the burner goes
into Level 1.
5. If the burner exceeds the Tmax, or the burner is switched “OFF”, or the
preset time interval set by clock timer - elapses, the device goes into mode
”Turn off”.
6. If the detected flame is too low within 30 seconds, the auger pauses and
pellets feeding is stopped until the flame becomes high .
7. If the detected flame is too low within 3 minutes, the device goes into
mode ”Turn Off”.
8. Activation of purging/cleaning:
After the preset time Parameter#24-“Auto Clean”), the nozzle starts
purging/cleaning for a time set from Parameter#29-“Purge”. Operation of
the burner does not change. If value is 0-10 sec. the time setting is in 0.1s,
If time is >10 sec, time is in 5 sec.
9. Regardless of the chosen level of operation, pellets feeding duration is
controlled by Parameter#10-“Burn Auger Run”)
10. After room thermostat OFF command is given, if Parameter#28-“
AMB_DELAY”) is “0” the burner will stop, if value is some sec. >0)–

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the burner will run at Level1 for the set time, and then will stop. If room
thermostat changes back to ON before time elapses, the burner will revert
to normal operation.
11. If burner is stopped due to room thermostat, and Parameter#28-“
AMB_DELAY”) is not “0”, after room thermostat changes back to “ON”
the burner will wait this time to elapse before initiating new ignition
cycle. The minimal temperature should be reached also)
Operating at Level 1
-Pellets feeding pause Parameter#13-“Burn Auger Pause 1”)
-The fan works at defined speed Parameter#17-“Burn Fan1”
Operating at Level 2
-Pellets feeding pause Parameter#12-“Burn Auger Pause 2”)
-The fan works at defined speed Parameter#16-“Burn Fan2”
Operating at Level 3
-Pellets feeding pause Parameter#11-“Burn Auger Pause 3”)
-The fan works at defined speed Parameter#15-“Burn Fan3”
Mode”Turn Off”-the inscription “Turn Off” is displayed
1.The fan is operating at 100%.
2. After the flame turns off, the countdown timer starts
Parameter#18-“StopMax Time”.
3. After the time elapses, the burner goes into mode "Ready" or "Off"
depending on the preset mode.
4. Activation of purging/cleaning mode for a preset time.
Mode” Standby”-the inscription “Standby” is displayed
1.You should wait the temperature to fall below “Tmin” and the ignition
will start again.
Mode”Off”
1. Wait timer turn off the device or press buttons on the controller.

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4.Service Technician Manual
Start/Stop
- Manual switch on - set the controller in “On” state by pressing the [Start]
button.
Note: It is possible that the device starts automatically, if the program of
the clock is enabled or GSM tele-control “on” command is issued.
- Manual switch off - set the controller in “OFF” state by pressing the
[Stop] button.
Note: It is possible that the device stops automatically, if the program of the
clock is enabled or GSM tele-control “off” command is issued.
-Automatic start - from the clock, upon reaching a preset time for turning
on, the burner starts automatically.
-Automatic stop - from the clock, upon reaching a preset time for turning
off, the burner turns off automatically.
Note: If you want to operate only manually, it is necessary to disable the
timer program.
Description of the displays
1. Basic display, mode”Off”, it is switched on when you press the Start button.
Row 1: Indications of the temperature sensor of 27 ºC, mode off,
and timer status.
If the timer is activated, it is displayed on the screen.
T 27° Off
13:15
T 27° Off +Timer
13:15

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2. Basic display, mode”On”, it is switched on when you press [Stop] button.
Row 1: Boiler temperature sensor reading - of 27 ºC mode “On”.
If no sensor is connected or sensor reading is over 99 ºC - “no” inscription is
displayed– operation is disabled.
If sensor is short circuited - “sc” inscription is displayed – operation is
disabled.
“f” -indication for flame
-if the flame is stable the symbol ”^” is displayed
-if the flame is weak, the symbol “!” is displayed
-if there is no flame, the position is blank
“p”- indication of the status of the pump
-if it is switched on, the symbol ” P” is displayed
- if it is switched off, the symbol ” p” is displayed
“i”-indication for the ignition heater
-if it is switched on, the symbol ” H” is displayed
- if it is switched off, the symbol ”.” is displayed
“a”-indication for the auger transporter
-if it is switched on, the symbol ” S” is displayed
- if it is switched off, the symbol ” s” is displayed
“f”-indication for the fan
-if it is switched on, the symbol ” F=xx” is displayed/x is the symbol for the
degree of fan rates/
- if it is switched off, the symbol ” f=” is displayed
T 27° fpiafb =99 Pow:Y
Start 13:15

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“Y” in mode ”Burning” ,shows the current level from 0 to 3
Row2:
Current mode of the burner and the current time
“Start”-initial pellets feeding and ignition
“Ignition”(ixxx)-where x is the state of the flame
“Retry”-a new ignition attempt
“Burning”-indication for burning OK/No) and the
state of the flame(ixxx)
“Purging”-purging the combustion chamber, only the fan operates
“Cleaning”-cleaning the combustion chamber
“AMBtemp”- external thermostat activated
“Stop!”- suspending the operation of the burner and the preset time for ending
the cycle
“Standby”- the pre-set maximum temperature is reached. Upon reaching the
pre-set minimum temperature, the burner is reactivated or external thermostat
is activated.
“Over heated”- boiler temperature is above the limit or there is no temperature
sensor
“Over heatedPel”- Safety switch is activated – over temperature in pellet
weeding inlet is sensed
3.Screen #1 is displayed by pressing the button [Dn Arrow]
Row 1: operating cycle and maximal power
Indication for the cycle of the auger
“x.x”-runtime in seconds
“Y”-pause in seconds
A x.x/Ys MaxPw S
T-45-65 FL FFF AT

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“S”-maximum preset operating level of the burner
Row 2:
Preset operating temperature min/max 45-65ºC)
“FFF”-indication for the sensor of flame-parameters 0-240) .
The more intense the flame is, the greater the value is.
“AT”-Ambient room) thermostat state: “ON” / “OFF”.
Correction:
Correction of the preset temperature cycle by pressing the [OK] button
subsequently
Change the value by using [Dn Arrow] or [Up Arrow] or digits
[C]-delete
[OK]-for confirmation
[ESC]-for exit from the menu
4.Screen#2 -is displayed by pressing the button [Timer] once
Row1: Changing state of the timers
Indication for the state of the timers - Enabled/Disabled
Editing by pressing the [OK] button, the symbol “>” appears on the screen
Disable the timers by pressing[Dn Arrow]
Enable the timers by pressing [Up Arrow]
[OK]-for confirmation
[ESC]-for exit from the menu
Row2:Setting the Clock
Start edit by pressing the [OK] button. You should type the hour and the minutes
in the brackets[ ]
Timer. Disab
13:15:12
>Timer. Enabl
13:15:12
>Timer. Disab
13:15:12

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Change the value by using [Dn Arrow] or [Up Arrow] or digits
[C]-delete
[OK]-for confirmation
[ESC]-for exit from the menu
5.Screen #5-setting of the
Timer by pressing the [Timer] button twice
Row1: The number of the chosen timer
Setting of the time range of the timer
Row2: Setting of the time range of the timer in 15 minutes
Edit by pressing the [OK] button
Put “>” before the hour and minutes
Change the value by using [Dn arrow] or [Up arrow] or digits
[C]-delete
[OK]-for confirmation
[ESC]-for exit from the menu
6.Screen #4 -setting of the Timer2 by pressing the [Timer] button 3 times
Timer. Disabl
13:15:12
Timer. Disabl
[ 13]:15:12
Timer. Disabl
13:[15]:12
Timer 1 Adjust
From-11:15 To -16:30
Timer 1 Adjust
From > 05 : 15 To- 08: 30
Timer 1 Adjust
From- 05 > 15 To- 08: 30
Timer 1 Adjust
From- 05:15 To- 08 >30
Timer 1 Adjust
From > 05:15 To > 08:30

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Row1: The number of the chosen timer
Row2: Setting of the time range of the timer
Setting of the time range of the timer in 15 minutes
Edit by pressing the [OK] button
Put “>” before the hour and minutes
Change the value by using [Dn arrow] or [Up arrow] or digits
[C]-delete
[OK]-for confirmation
[ESC]-for exit from the menu
Service Menu
Access to the service menu is done by pressing the [SET] button. The service
menu is arranged in rows 1 to 7.
Set the maximum output power from 1 to 3
Timer 2 Adjust
From- 16 : 30 To- 22 :45
Timer 2 Adjust
From > 16 : 30 To- 22 :45
Timer 2 Adjust
From- 16 > 30 To- 22 :45
Timer 2 Adjust
From- 16 : 30 To > 22 :45
Timer 2 Adjust
From- 16 : 30 To- 22 > 45
Main Menu
1-Max Pwr 3