Sunsystem BURNIT CombiBurn DC-A Series Owner's manual

model:
serial №:
ES
FR
DE
EN
IT
Zweikammernkessel Serie CombiBurn DC – A
Chaudière bi-chambre série CombiBurn DC – A
Caldera de doble-cámara CombiBurn DC – A serie
Caldaia a doppia camera serie CombiBurn DC – A
Dual-chamber boiler CombiBurn DC – A series
PASAPORTE TECNICO. INSTRUCCION para МОNTAJE y EXPLOTACION
MANUEL TECHNIQUE INSTRUCTIONS pour L’INSTALLATION et L’EXPLOITATION
TECHNISCHER DATENBLATT MONTAGE- und BEDIENUNGSANLEITUNG
TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
MANUALE TECNICO. ISTRUZIONE di MONTAGGIO e USO

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TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
TABLE OF CONTENTS
1. EXPLANATION OF SYMBOLS AND SAFETY INSTRUCTIONS ......................................................................................... 3
1.1. Explanaonofsymbols ................................................................................................................................................. 3
1.2. Requirementstoburnerinstallaonroom.................................................................................................................. 3
1.2.1. Instruconstoburnerinstaller..................................................................................................................................... 3
1.2.2. Instruconstoinstallaonuser ................................................................................................................................... 4
1.2.3. Minimumclearancesforinstallaon.Combusbilityofconstruconmaterials ...................................................... 4
2. PRODUCT DESCRIPTION ............................................................................................................................................... 4
2.1. DesignstructureofDual-chamberboilerCombiBurnDC-A...................................................................................... 4
2.2. Automacashremovalsystem.Ashdepositcontainer.............................................................................................. 4
2.3. Designofpelletsburner ................................................................................................................................................ 4
2.4. Designofaugermechanismandfuelhopper.............................................................................................................. 5
2.5. Boilersafetydevices..................................................................................................................................................... 5
3. FUELS ............................................................................................................................................................................. 5
3.1. Woodpellets................................................................................................................................................................. 5
4. TRANSPORTATION ........................................................................................................................................................ 6
5. DELIVERY PACKAGE ....................................................................................................................................................... 6
6. INSTALLATION OF THE HEATING BOILER ..................................................................................................................... 6
7. SETUP OF THE HEATING BOILER ................................................................................................................................... 7
7.1. Connecngtheboilertoachimney............................................................................................................................. 7
7.2. Connecngtheboilertothemainspowersupply ...................................................................................................... 7
7.3. Connecngthesafetyheatexchanger ........................................................................................................................ 7
7.4. Connecngtheboilertotheheanginstallaon ....................................................................................................... 8
8. FILLING THE HEATING INSTALLATION .......................................................................................................................... 9
9. OPERATION OF BOILER ................................................................................................................................................. 9
9.1. Ignion.Combuson.Automaccleaningsystem...................................................................................................... 9
9.2.
Importantrecommendaonsforlong-lasngandcorrectoperaonoftheboiler .......................................................... 9
10. CONTROLLER UNIT ....................................................................................................................................................... 9
10.1. Controllerview.Explanaonofbuonsandindicators .............................................................................................. 9
10.2. Usermenu.................................................................................................................................................................... 10
11. WARRANTY TERMS ..................................................................................................................................................... 12
12. TECHNICAL FEATURES ................................................................................................................................................ 12
12.1. ElementsofDualChamberboilerDC-A ................................................................................................................... 12
12.2. TechnicalparametersofDualChamberboilerDC-A ............................................................................................... 12
13. RECYCLING .................................................................................................................................................................. 13

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TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
1. EXPLANATION OF SYMBOLS AND SAFETY
INSTRUCTIONS
1.1. Explanation of symbols
CAUTION! – Important recommendation or warning
concerning safety conditions during installation and
operation of the pellet burner
DANGER! – fault or improper use may cause injury or
be hazardous to life of humans or animals.
FIRE HAZARD! – fault or improper installation and
operation may cause fire.
INFORMATION – Important information on the
proper operation of the product.
1.2. Requirements to Dual-chamber boiler installation
room
Thismanualcontainsimportantinformationforthesafeand
correctinstallation,start-upandtrouble-freeoperationand
maintenanceoftheboiler.
TheDual-chamberboilercanbeusedforheatingroomsonly
inthemannerdescribedinthismanual.
The application and any other was the area of operation
is not recommended by the manufacturer and is not
responsiblefortheoccurrenceofdefectsorfailures.
Note the boiler type data on the factory rating label and
thetechnicaldataprovidedinchapter13inordertoensure
properoperationoftheproduct.
1.2.1. Instructions to boiler installer
During installation and operation, the country-specific
requirementsandregulationsmustbeobserved:
•Local construction regulations on installation, air supply
andexhaustgasextractionaswellaschimneyconnection.
•Regulationsandnormsconcerningthefittingoftheheating
installationwithsafetydevices.
•Required installation of a smoke detector in the boiler
room.
Use only original BURNiT parts
WARNING! Installation and setup of pellet burner
should be done by an authorized specialist / service
shop and must follow the safety instructions and
rules of operation.

DANGER of intoxication, suffocation.
Inadequate inflow of fresh air to the boiler room
may result in dangerous leak of exhaust gases
during boiler operation.
-Makesuretheairinletsandexhaustgasoutletsare
notcloggedorclosed.
-Iffaultsarenotremediedimmediately,theboiler
mustnotbeoperated.
-Theusermustbeprovidedwithwritteninstructions
onthefaultandthehazarditentails.

DANGER of fire when burning flammable materials
or liquids.
- Flammable materials/liquids must not be left in
closeproximityoftheburnerandheatingboiler.
- Instruct system user of the allowed minimum
clearancesfromsurroundingobjects.
It is mandatory to assure a backup power generator
of corresponding rated power! (see 12.2)
Customer must undergo boiler operation/
maintenance training by authorized installer/
service shop.
1.2.2. Instructions to installation user

DANGER of intoxication or explosion
Toxic gases may be discharged when burning
waste, plastics, liquids.
-Use only the fuels indicated in this manual.
-In case of danger of explosion, ignition or discharge
of exhaust gases in the room, stop the pellet burner
from operation.

CAUTION! Danger of injury / damage of system due
to incompetent operation.
-The boiler must be serviced only by persons
familiarwiththeoperationmanual.
-As user, you are only allowed to start the boiler
up,adjustthetemperatureoftheboiler,shutthe
boilerdownandcleanit.
-Unattendedchildrenmustnotbeallowedaccessto
premiseswithrunningboilerinside.
It is mandatory to assure a backup power generator
of corresponding rated power! (see 12.2)
Customer must undergo boiler operation/
maintenance training by authorized installer/
service shop.
Safety rules for user operation:
-Operatethepelletburneronrecommendedfuelonly,and
tothatendyoumustregularlyinspecttheboilerroom.
-Donotusebothcamerasforburningfuelatthesametime.
Before starting the boiler, make sure there is no residual
fuelinoneofthetwocamerasand/orburner.
-Do not use flammable liquids for ignition or increase of
burneroutput.
-Collectashinlid-coveredfireproofcontainers.
-Cleantheburnersurfaceusingnon-flammableagentsonly.
-Do not place flammable objects onto the burner housing
and heating boiler cabinet or in their proximity. (see
diagram 1fortheminimumclearances)
-Donotstoreflammablematerialsintheboilerroom.
-Boilers, chimneys and other connections of mounted
burnermustmeetstandardsforfireandemergencysafety
ofthecountry.
-It is mandatory to strictly observe instructions for
connectingtheburner to power network aswellasto all
peripherals.
-Structural changes to Dual-chamber boiler by user can
causedamagetoequipmentorinjury.
-Donotallowcontacttransmissionofelectricalwireortouch
anypartoftheboiler,wherethesurfacetemperaturecan
exceed70°C.
-Thismanualshouldbekeptthroughoutthelifetimeofthe
boiler.

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TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL

CAUTION! Hot surface!
Risk of burns if you touch the running system.
Burner housing, body and flange are hot surfaces
during burner operation.
-It is strictly prohibited to open boiler inspection
doors with the burner running.
-Close and buckle-lock the hopper hatch cover after
filling the boiler with fuel. The hopper hatch cover
is not allowed to remain open for longer periods of
time.
-Also, exercise caution when touching the
observation port for monitoring the burning
process. It may be hot.
1.2.3. Minimum clearances for installation and flammability
of construction materials
The applicable minimum clearances in your country may
differ from the ones specified below. Please, consult your
installer.
The minimum distance from the burner, heating boiler or
exhaustgaspipetoobjectsorwallsmustbeatleast200mm.
Table 1. Flammability of construction materials
Class А–non-
flammable
Stone, bricks, ceramic tiles, baked clay,
solutions,plasterfreeoforganicadditives.
Class B–hardly
flammable
Gypsumboardpanels,basaltfiberneedled
felt, fiberglass board, AKUMIN, Izomin,
Rajolit,Lignos,Velox,Heraklit.
Class С1/С2
Medium
flammable
Wood beech, oak. Wood softwood,
layeredwood
Class C3–easy
flammable
Asphalt, cardboard, cellulose, tar,
fiberboard, cork, polyurethane,
polyethylene.
Diagram 1. Recommended clearances between
boiler and walls.
Forgeneralsafetyconsiderations,we recommendthatthe
boilerbeplacedonafoundationmadeofclassAmaterial,
seetable1.
2. PRODUCT DESCRIPTION
Diagram 2
The CombiBurn high-efficiency dual chamber boiler is
designatedforcentralheatingofpremisesthroughburning
ofwoodpelletsusing ahigh-efficiencyburnernintegrated
to its lower combustion chamber. As alternative (backup
fuel)foritcanbeusedwoodlogs,woodbriquettesandcoal,
whichareloadedtotheupperboilerchamber.
CAUTION! Do not use both chambers for burning
fuel at the same time.
To prevent heat losses into the ambience, the boiler is
insulated on the outside by high-temperature rock wool.
Efficiency–rateupto89%.DesignedinconformitywithEN
303-5,class5.
Set includes Dual-chamber boiler DC-A, pellet burner CW,
fuelhopper,removableash-and-sootcontainer.
2.1. Design structure of Dual-chamber boiler CombiBurn DC
Boiler body is with two combustion chambers. The wood
pelletburnerisinstalledinthelowerchamber.Ametalgrate
dividestheupperfromthelowercombustionchamber.On
this grate the backup fuel (firewood, wood briquettes or
coal)isloaded.Theboilerbodyismadeofboilergradesteel
ofthickness6mmforthecombustionchamberand3mm
forthewaterjacket.
• Ecological. Wood pellets and firewood used in the
combustion process are renewable energy sources with
minimumemissions.
•Automated. The main control unit, integrated in the
burner, manages the entire heating process. Controller
functions:
1) Fullyautomatedignitionandpelletfeed;
2) Fanensuringstableoperationofburner;
3) Self-cleaningfunction(adjustable1-4timesover24hours
atequalintervals),programmablestarttime;
4) Built-indischargemechanismdrivestheashandsootinto
aremovablecontainer;
5) Controls the operation of the circulation pump of the
centralheating;
6) Controlstheoperationofthepumpofthedomestichot
water;
7) Optionforcontrolbyroomthermostat;
8) Timer;
9) Optionalformanualmodewhenusingtheupperchamber
andburnedwoodand/orcoal.
•Efficient.Ontheirwaytothechimneyfluegasesmakea
three-pass run around three water-filled barriers inside
the combustion chamber. Thus flue gas is cooled down
untilexitfromboiler,havingallitsheatenergytransferred
tothewaterinsidethejacket.Thewaterjacketembraces
thecombustionchamberinfulltoutilizetheemittedheat
mostefficiently.Topreventheatlossesintotheambience,
theboilerisinsulatedontheoutsidebyhigh-temperature
rockwool.Efficiency–rate89%.
2.2. Automatic ash removal system. Ash deposit container
Thespeciallydesignedash-and-sootdisposalsystemallows
theashandsoottosubsideatthelowestpointoftheboiler
body(1)andbedisposedinsidetheashandsootcontainer
(2) usingatransportscrew(3)andastirringmechanism(9).
Ash-and-soot container is removable. It is equipped with
a handle (4) and wheels (5) for convenient disposal. Once
youhaveemptiedthecontainerofashes,pleasemakesure
youclosethecontainercovertightly(6),buckle-lockittothe
containerbuckles (7),thenbuckle-lockthecontainertothe
boilerbuckles (8).
Diagram 3. Removabe container elements
2.3. Design of wood pellets burner CW
The burner is made of high-quality stainless steel able to
withstandtemperaturesofupto1150°С.TheburnerCWis
installedonside-flangeofheatingboiler.

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TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
Elements of pellet burner are:
1 - Burner; 7 - Cleaning system;
2 - Air mantle; 8 - Photo-sensor;
3 - Screw mechanism; 9 - Fuel hopper flange;
4 - Air feed fan, step-
regulated; 10-
Sensor safety valve
of reverce fire
temperature;
5 - Wood pellets igniter
using hot air; 11-Support with adjustable leg.
6 - Screw (inner auger)
motor;
Diagram 4. Burner CW elements
2.4. Design of auger mechanism and fuel hopper (wood
pellets) /Diagram 5/
Itconsistsofaspiralconveyormountedtotheaxle,drivenby
motorreducer,whichisattachedtothebodyoftheauger.
Augerandfuelhopperareconnectedbymedialflange.
Temperaturesafetyvalve(3)isconnectedtoawatertank(2)
andincaseofreverceflameinauger,releacethewaterinto
the medial flange (4), located between auger (5) and fuel
hopper(1)andpreventfuelfiring.
Convinient maintenance openings are provided on auger
mechanismandonmedialflange.
The hopper hatch-cover remains to be closed during
operationofboiler.
Thewatertank(2)mustbefilledwhenboilerisoperating.
Diagram 5. Auger CW and Fuel hopper elements
2.5. Boiler safety devices
Safeoperationofboilerisensuredviaasetofsafetydevices.
Combustion process is electronically regulated via step
modulation of burner performance according to power
needs,andalsomaintainedinoptimumworkingmode.Two
independentthermostats–thatontheboiler(STB type)and
theoneontheaugermechanism(bimetallic thermostat set
at 80°С)wouldstopthefuelfeedingintotheburnerincase
ofexcesstemperatureload.
In addition, the burner has a supplementary heat safety
valve(with sensor mounted on auger housing)connected
toanextrawatertankofvolume10litres(mountedonthe
back side of hopper housing and pipe-connected to auger
mechanism)capabletoputoutabackfireflameshouldone
emergeinsideaugertubeorhopper.
•Fuse.Incaseofelectricalfaultinthesystemoftheburner
(shortcircuit,currentoverload,etc.),theoverloadisborne
bytheelectricalfusefittedonthemaincontrolpanelofthe
burner(3,15А).
•Power interruption. In case of power interruption, all
parameter settings are stored in the memory of the
controller.Uponthesubsequentrestartoftheburner,the
controllerresumestheexecutionoftheprogramfromthe
pointwhenthepowerinterruptionoccurred.
3. FUELS
3.1. Wood pellets
All pellets are biomass manufactured from common low-
growing plants and trees. The most common household
typepelletsaremadeofsawdustandmilledwoodchippings
whicharewastematerialfromwoodusedintheproduction
oflogs,furnitureandotherproducts.Woodistherichestraw
materialwhichdoesnothaveanyimpactontheproduction
costs of food products or ethyl alcohol (ethanol). The raw
materialisprocessedunderhigh-pressureandtemperature
andispressedtoproducesmall-sizecylindricalpellets.The
productionprocessmayutilizesoftwoodmaterial(suchas
softwood,pine),hardwood(oak)aswell asrecycledwaste
wood.Woodpelletsareproducedinhammermillsorwood
pelletplants.
Advantages of wood pellets:
•Convenient storage. Pelletbagscanbestoredonasmall
areainadrygarage,basement,serviceroomorshed.
•Easy loading. In most cases the boiler hopper needs
loading only once a week – this depends on the hopper
capacity.
•Better control of fuel quantity.Thesmallsizeofthepellets
allows for precise fuel feeding. On the other hand, the
supplyofairforreachingoptimalcombustionefficiencyis
easiertoadjustsincethefuelquantityinthecombustion
chamberremainsconstantandpredictable.
•Fuel efficiency. High combustion efficiency is also
determined by consistently low moister content of
pellets (consistently under 10% as opposed to 20% to
60%moisturecontentofthelogs).Lowmoisturecontent,
controlledfuelportionsandpreciseairsettingmeanshigh
combustionefficiencyandvery low carbon oxides inthe
fluegases.
i
When purchasing pellets, ask for conformity
declaration and certificate issued by an accredited
laboratory and make sure the fuel meets the
requirements indicated in the manual. If you
purchase large amount of pellets (bulk supply for
the entire heating season for example), ask your
supplier to provde accurate and true information
about the storage conditions.
Werecommendtousepelletwithsizeof6 - 8 mm.Density
600 - 750 kg/m³heatingvalue 4,7 - 5,5 kWh/kg.Ashcontent
–lessthan1%andmoisturecontentupto8%,EN 14961-
2:2011.
The optimal density of the pellets which guarantees their
qualityis605 - 700 kgpercubicmeter.
Pellet moisture content must not exceed 10%. Make sure
youstoreyourfuelinadryandwell-ventilatedplace.
Theoptimalpelletashcontentis ≤ 1%.Thisalsoprovidesfor
lessfrequentcleaningintervalsfortheburner.
The table below contains the parameters which we
recommendthatyoutakeintoconsiderationwhenchoosing
fuelforyourburner.

6
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TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
Table 2. European Certification of Wood Pellets for Heating Purposes
Parameters Units ENplus-A1 ENplus-A2 EN-B
Diameter mm 6(±1)
8(±1)
6(±1)
8(±1)
6(±1)
8(±1)
Length mm 15≤L≤401) 15≤L≤401) 15≤L≤401)
Bulkdensity kg/m2≥600 ≥600 ≥600
Calorific/heatingvalue MJ/kg ≥16,5-19 ≥16,3-19 ≥16,0-19
Humidity/moisture Ма.-% ≤10 ≤10 ≤10
Dust Ма.-% ≤13) ≤13) ≤13)
Mechanicaldurability Ма.-% ≥97,54) ≥97,54) ≥96,54)
Ash Ма.-%2) ≤0,7 ≤1,5 ≤3,5
Meltingpointofash °C ≥1200 ≥1100 -
Chlorinecontent Ма.-%2) ≤0,02 ≤0,02 ≤0,03
Sulfurcontent Ма.-%2) ≤0,03 ≤0,03 ≤0,04
Nitrogencontent Ма.-%2) ≤0,3 ≤0,3 ≤1,0
Coppercontent mg/kg2) ≤10 ≤10 ≤10
Chromiumcontent mg/kg2) ≤10 ≤10 ≤10
Arseniccontent mg/kg2) ≤1,0 ≤1,0 ≤1,0
Cadmiumcontent mg/kg2) ≤0,5 ≤0,5 ≤0,5
Mercurycontent mg/kg2) ≤0,1 ≤0,1 ≤0,1
Leadcontent mg/kg2) ≤10 ≤10 ≤10
Nickelcontent mg/kg2) ≤10 ≤10 ≤10
Zinccontent mg/kg2) ≤100 ≤100 ≤100
1) not more than 1% of the pellets may be longer than 40 mm, max. length 45 mm;
2) dry weight;
3) particles <3.15 mm, particulate matter, before handing over the goods;
4) measurements with Lignotester limit value ≥ 97,7% by weight.
4. TRANSPORTATION OF THE BOILER
We recommend to transport the heating boiler to the
installationsiteinitspackagingplacedonthepallet.During
transportandinstallation,dependingontheweight,suitable
safetydevicesshouldbeusedinaccordancewithDirective
2006/42/EC.
Whentransportingitemsweighingmorethan30kg,theuse
ofpalletjack,forktruckorotherhoistingdevicesisamust.
Product must be in original packaging following the
instructions on the label - to be protected from adverse
weatherconditions(snow,rainanddust)fromtheshocks,
and other activities likely to cause damage. In case of
malfunction of the fan or the motor drive (noise, friction)
orfailureofhigh-techelementssuchasbrokenLCDscreen,
contact your nearest authorized service center for repairs
andmaintenance.
Theboilerissecurelyfastenedwithfastenerstoawooden
pallet.
Important: When installing the boiler, the wooden
pallet onto which the boiler is placed must be
removed by unscrewing the bolted connections
using flat ring wrench S13.
Table 3. Overal dimensions of Set CombiBurn DC-A,
including: Dual-chamber boiler, Burner, Auger, Fuel
hopper, ash-and soot container (packed and placed into
Fuel Hopper).
Set
CombiBurn
DC-A30kW
A,
mm B, mm C, mm D, mm
Weight,
kg
1320 1070 175 1770 527
Diagram 6. Indications dimensions
5. DELIVERY OF THE BOILER
•Inspecttheintegrityofthepackagingupondelivery.
•Check whether all components have been delivered to
you.Boilerconsignmentpackageincludes:
1) Set CombiBurn DC-A: boiler, burner, fuel hopper, ash-
and-sootcontainer(packedandplacedintofuelhopper).
2) Safetyvalve3bar.
3) Fireirons.
4) Cleaningbrushforfluepipes.
5) Technicalpassport.Installationandoperationmanual.
6) ServicebookletandWarrantycard.
Ifanyoftheaboveitemsaremissing,contactyoursupplier.
6. INSTALLATION OF THE HEATING BOILER

The assembly, installation and set-up of the boiler
must be performed by a technician authorized for
such operations.
Installer must indicate to the user of the installation
the minimum clearances from flammable materials
and liquids.
Requirements:
-Boilerroommustbefrost-proof;
-Boiler room must allow for continuous access of air
necessarytomaintaincombustion;
-Boilersmustnotbeplacedininhabitablerooms;
-All boiler rooms must have correctly calculated vent
dependingontheboileroutput.Theventmustbeprotected
bymeansofanetorgrate.
Thesizeoftheventiscalculatedaccordingtotheformula:
А = 6,02*Q-where:
А–areaoftheventincm,

7
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TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
Q –boileroutputinkW
-Removethepackagingwithoutpollutingtheenvironment
-Observebuildingsupervisioninstructions,inparticularthe
existing Ordinance on combustion devices and storage of
combustionmaterials,onbuildingrequirementsapplicable
toinstallationsitesandonventilation;
-Theboilermustbeplacedonafoundationwhosesurface
areaislargerthanthebaseoftheheatingboileraccording
todiagram1;
-Theboilermustbeplacedinapositionwhichallowsforthe
easiestpossiblecleaningandservicing;
-Installation must be carried out according to installation
diagram1whichshowstheboilerhousing;
-Noobjectsmadeofflammablematerialsorliquidsmaybe
placedon/neartheboiler;
7. SETUP OF THE HEATING BOILER
7.1. Connecting the boiler to a chimney
Boiler-to-chimneyconnectionmustalwayscomplywiththe
existing standards and rules. The chimney must provide
sufficient draught for evacuation of the smoke under any
conditions.
The proper functioning of the chimney requires adequate
sizing of the chimney itself since the draught it produces
affectscombustion,boiler’soutputandlifespan.
Thedraughtcreatedbythechimneyisinfunctionalrelation
toitscross-section,heightandtheroughnessofitsinterior
walls.Nootherappliancemaybeconnectedtothechimney
serving the boiler. Chimney diameter must not be smaller
than the flue outlet of the boiler. Flue outlet must be
connectedtothechimneyopening.Intermsofmechanical
properties,theflueoutletmustbesturdyandproperlysealed
(toavoidgasleak)andallowforeasyaccessforcleaningon
theinside.Theinnersectionoftheflueoutletmustnotbe
greaterthantheeffectivesectionofthechimneyandmust
notnarrow.Avoidusingelbowjoints.
Diagram 7. Boiler size and chimney parameters
Table 4. Recommended minimum sizes and chimney draft
Boiler output Chimney diameter, mm Chimney draft, Pа
30-40 kW Ø 180 mm Ø 200 mm
Ø 220mm
15 - 30
15 - 30
15 - 30

Data in the tables are for indicative purposes.
Draught depends on the diameter, height, uneven
sections along the chimney surface and differences
in temperature of combustion products and
outside air. We recommend that you use chimney
fitted with flue terminal. Heating specialist must
calculate the precise sizing of the chimney.
Thechimneycleaningopeninghas tobeinitslowestpart.
Thechimney’swallhastobethreepliedwherethemedium
layerisfrommineralwool.Thethicknessoftheinsulationis
notlessthan30mmwhenthechimneyissettingupinside
thehouseandthethicknessis50mm,whenthesettingup
isoutside.
Theinnerdiameterofthechimneydependsonitsrealheight
andthepowercapacityoftheboiler(seediagram6).
7.2. Connecting the boiler to the mains power supply
+Caution! ELECTRIC SHOCK HAZARD!
-Before opening the unit: switch off the voltage and
secure the unit against accidental restart.
-Observe installation instructions.
All connection works must only be carried out by
qualified electricians.
Improper cable connections may damage the
regulator!
The device may be damaged if struck by a lightning.
Make sure it is unplugged during the storms.
It is mandatory to assure a backup power generator
of corresponding rated power! (see 12.2)
Diagram 8. Wiring diagram of connection of boiler
elements to the controller
Diagram 9. Wiring diagram of connection of burner
elements to the controller and connecting socket
Inputs
Group 1
RT Roomthermostat
PS Photosensor
RB Reverseburning
Group 2
WH Waterheater
Outputs
FM Fanmain
CA Cleanash
SB Screwburner
PH Pumpheating
PWH Pumpwaterheater
IGN Igniter
FC Fancleaning
Theboilermustbeconnectedtoa220V/50Hzmainsusing
powercord.
Create tight connection with the electrical mains which
complieswiththelocalregulations(see diagram8,9).
7.3. Connecting the safety heat exchanger
Such connection must be performed by a technician
/ service shop authorized for such operations.
TheDualChamberboilerDC-Aisequippedwithsafetyheat
exchanger(coolingcircuit).Itconnectstothewatersystem
through a thermostatic valve. In case of overheating, the
thermostaticvalvefeedsincoldwaterfromthewatermains
whichpassesthroughtheheatexchangerand absorbs the
heat in the boiler. The water is then discharged into the
sewagesystem. This arrangementensuressafe evacuation
oftheexcessheatwithoutthe need foradditionalenergy.
Thisguaranteesthatthewaterintheboilerwillnotexceed
themaximumsafelevelof95°C.
Theminimumoperatingpressureofthecoolingwaterinthe
safetyheatexchangermustbewithintherange2 ÷ 10 bar.
A flow rate of at least 12 l/min is required. Connect the
safety heat exchanger according to the hydraulic diagram
usingthermostaticvalve.Installafilterontheinletbefore
thethermostaticvalve.

8
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TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
1. Water supply network (pressure 6-10 bar)
2. Drainage (sewerage)
3. Boiler DC-A
4. Safety heat exchanger inlet
5. BVTS valve sensor
6. Safety heat exchanger outlet
Diagram 10. Connecting the safety heat exchanger
7.4. Connecting the boiler to the heating installation.
Such connections must be performed by a
technician / service shop authorized for such
operations.
When the boiler is connected to a heating system, it is
mandatorytoinstalla3barreliefvalveandexpansionvessel.
Noshut-offfittingsmaybeinstalledbetweenthereliefvalve,
expansionvesselandboiler.

It is mandatory to install a three-way valve
(Laddomat or similar) or a four-way mixing valve
which to ensure that the temperature of the
heating medium fed into the boiler from the
heating installation is at least 65°С.
Table 5. TROUBLE-SHOOTING TABLE
Installation damage
Cause Solution
1.Duetounsealedconnections
1. Installtheconnectingpipingstrain-freetotheboilerconnections.Connect
the heating installation outlet to connection B. Connect the heating
installation inlet to connection A. Mount the cock Y included in the set
item.11.4.atthedrainageoutlet.
2.Duetofreezing
2. If the heating installation, including the piping network, has not been
built frost-proof, we recommend that you fill the heating installation
withaliquidwhichhaslowfreezingpointandcorrosionprotectionand
antifreezeagent.
Boiler water too hot, heating bodies too cold
1. Hydraulicresistanceistoohigh.
2. Airinthesystem
3. Inoperablecirculationpump
Makesurethecirculationpumphasbeenproperlyselectedandtheheating
installationisoftheproperdimensions.(Youmustcontactyourinstaller.)
TheSTBsafetythermostathasbeentriggered.
Upon reaching a temperature of 95°С, the thermostatic safety protection
deviceistriggeredandthefanisturnedoff.Toresumeprotection,remove
theblackcaponthefrontpanel of theboilerandpressthebuttononthe
STB-thermostat.
Contactyourinstallertodeterminethecauseofprotectiontriggering.
Low temperature in the boiler on which the burner is installed. Unable to reach normal temperature mode of 65°С-85°С
Inadequate sizing and/or combination of
heatingappliances
Immediatelyconsult your installer abouttheproblem. Mount the supplied
fillinganddrainagecockonthedrainageoutletY.
Ejection of unburned pellets into the combustion chamber of the boiler
Pooradjustmentofthe fuel-to-air ratio from
theburnercontroller
Contact your installer. It is necessary to set the burner properly using gas
analyzer
Utilizationoflow-qualitypellets(shorterthan
thespecifiedlength) Useonlyfuelwhichmeetstherequirementsspecifiedinthemanual.
Formation of clinkers and noncombustible inclusions inside burner body
Utilization of low-quality pellets (with higher
ashcontent) Useonlyfuelwhichmeetstherequirementsspecifiedinthemanual.
Low performance of the automatic cleaning
system Increaseturn-onfrequencyoftheautomaticcleaningsystem.
Impropersettingoffuel-airmixture Adjustusinggasanalyzer
Smoke in the pellet hopper
Poor chimney draught or high internal
resistanceoftheboilercombustionchamber Immediatelyconsultyourinstallerabouttheproblem.
Blockageofburnercombustionchamberdue
tobuild-upofnoncombustiblematerials Itisnecessarytocleantheburnercombustionchamberusingbrush
Impropersettingoffuel-airmixture Adjustusinggasanalyzer
Unstable flame (photosensor detects >180 units at maximum output)
Blockageofburnercombustionchamberdue
tobuild-upofnoncombustiblematerials Itisnecessarytocleantheburnercombustionchamberusingbrush
Dustonthephotosensor Itisnecessarytocleanthephotosensor.Refertothemanualforthecleaning
procedure.
Impropersettingoffuel-airmixture Adjustusinggasanalyzer
Fuel auger flooded by water from safety tank due to temperature relief valve activation.
Powerfailure Itismandatorytoassureabackuppowergeneratorofcorrespondingrated
power!/see12.2/

9
EN
TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
8. FILLING THE HEATING INSTALLATION
Table 6
Problem Prevention
Possible installation
damage due to strains
in the material caused
by temperature
differences
Fillthe heating installationonlyin
coldconditions (inlet temperature
mustnotexceed40°C).
Danger of installation
damage due to
accumulation of
deposits
Condensate formation
and tar deposits
may shorten boiler’s
operationallife.
-Donotoperatetheheatingboiler
foralongperiodoftimeinpartial
loadmode
-The temperature at the boiler
inletmust notbe less than65°C,
boilerwatertemperaturemustbe
between80°Cand85°C.
-Usetheboilerforashortperiodto
heatwarmwaterinthesummer.
9. OPERATION OF BOILER
Failure to observe the installation and operating
requirements described in the manual and the
service booklet voids the warranty.
9.1. Operation of Dual chamber CombiBurn DC-A
•IGNITION. Afterthestartupoftheboilerfromthecontrol
panel, the main pellet auger conveys certain amount of
fuel from the pellet hopper to the burner. This specific
amountof pellets issetby the installerand depends on
the fuel characteristics. The fed-in quantity of pellets is
conveyedfromtheaugerconveyorbuiltintheburnerto
the combustion chamber where it is being ignited using
hotair.
•BURNING. The burning process takes place in the
combustion chamber and, after it has been fed into the
combustion chamber, the fuel is then transported from
theinternalaugerconveyortothecombustionchamberin
portions.Thisallowsforconstantandoptimalburningrate
ofthefuel.Flameintensityismonitoredbyaphotosensor
which monitors the burning and feeds data into the
controlunitwhichenablesthestartingorstoppingofthe
combustionprocess,ifnecessary.Theoutputoftheburner
isdeterminedbytheintervalspresetonthecontrolpanel
takingintoaccounttheheatingvalue,sizeanddensityof
thepellets.
•AUTOMATIC CLEANING SYSTEM.TheDualchamberboiler
DC-A is equipped with innovative automatic cleaning
systemforcombustionchambersofbothdivices.
Apowerfulcleaningmotorbuiltintheburnerbody,airis
beingblownin at highspeedandrate thus removing all
residues – ash, noncombustible inclusions, etc. built up
intothecombustionchamberoftheburner.
At the same time the boiler turns on automatic ash
removalwhichistransportedtotheashcontainerthrough
screwlocatedinthelowerpart.Theseautomaticcleaning
cycles last several seconds and can be additionally
adjustedaswellastheirrepeatratedependingontheload
oftheburner.
9.2. Important recommendations for long-lasting and
correct operation of the boiler
-For assembly and installation of the burner follow the
requirementsinthismanual.
-Useonlyrecommendedinthismanualfuel.
-Cleanash-and-sootcontainerweekly.
-Disassembletheburnerfromtheboilerbodybeforeclean
it.Dependingonfuelandburnersettings,cleanthepellet
burneronceaweek:
 1)Disassemblepelletburner.
 2)Useawirebrushtocleanburnerchamber
 3)Useavacuumcleanertocleantheashesunderneaththe
chamber
 4)Assemblethecleanedburner
-Donotusebothchambersatthesametime
-User`strainingforoperationandmaintenanceofburneris
performedbyanauthorizedinstallerorserviceshop.
-Itismandatory to clean andcomplete maintenance once
per year of all burner components and boiler chamber
components.
Failure to observe the installation and operating
requirements described in the manual and the
service booklet voids the warranty.
10. CONTROLLER UNIT
10.1. Controller view. Explanation of buttons and indicators.
LCD screen: Thecontrollerscreendisplaystheinformation
fortheoperationofthefacility.
Explanation of buttons:
Button F –functionkey(button).
Used to move from one page to the
next menu, and passing the burner
from one stage to another (Manual
-Auto–Programe).
Button ”Enter”  – Used to move
from one line to another menu of the
controller.Confirmtheenteredvalue.
Buttons “Navigation arrow Up” and“Navigation arrow
Down”  – Used to change the value of a parameter
inthemenu.Afterenteringthe correctvaluepressbutton
“Enter”,tomovetonextparameter.
Display symbols explanation:
Auto Clean symbol appears in right upper part of
display. Active auto cleaning symbol means boiler
automaticcleaningmode.
Crossed-outflamesymbolappearsinupperrightpart
of display. Means that the boiler enters into
Extinguishmode.
CH priority/Radiator/symbolappearsinupperpart
ofdisplay.MeansthanCentralHeatingpriorityisset
toheatupthecentralheating.
Domestic Hot Water /shower/ priority symbol
appears in upper part of display. Means than DHW
priority  is set to heat up the domestic hot water.
WhensetDHWtemperatureisreached,DHWpumpstops
andCHpumpisactivated.
Parallelpumps/showerandradiator/symbolappears
in upper part of display. Means that  is set equal
priority to both pumps. They work in parallel and are
controlledbytemperaturesensors.

10
EN
TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
Summer mode/showerandsun/symbolmeansthan
is set Summer heating mode. Only DHW pump is
active.
Burnerflame symbol appearsin upper right part of
display.Meansthatburnerisactivated.Burnergoes
intoIgnitionmodeandupcomingboilerfireup.
Flame 3 symbol means Maximum output mode of
boiler.Inthismodetheboileroperatesatmaximum
output.
Flame 2 symbol means Medium output mode of
boiler.  In this mode the boiler operates at partial
output.
Flame 1symbolmeansLow output modeofboiler.In
thismodetheboileroperatesatminimumoutput.
ThissymbolmeansSuspend mode ofboiler.
Thenotice“Hi”appearanceonthescreenwherethe
boiler temperature is displayed means that the
measured boiler body temperature is above 120°C.
Flashingandbeepingalarmisactivated.Whentheissueis
corrected,notificationcanbedeleted.Whendisconnectthe
boilerfromelectricalsupplyforfewsecondsandthenswitch
onitagain,boilergoesbacktonormaloperation.
Boiler increased temperature.  Those two symbols
appearance on the screen where the boiler
temperature is displayed means that boiler
temperaturehasincreasedupto99°C.
Error symbolappearsinrightupperpartofdisplay.
Flashing and beeping error symbol mean error or
faultinboileroperation.Use“Enter“buttontomove
tonextscreenwitherrornotificationinlowerleftpart
ofdisplay.Whentheissueiscorrected,errornotificationcan
be deleted. When disconnect the boiler from electrical
supplyfor few seconds andthen switch on itagain, boiler
goesbacktonormaloperation(errornotificationisdeleted).
Factory setting - Alarms
BB
ALARM
ReversefireAlarm(whenthethermostatcontact
RBinputisopen)
SENSOR
E1
BoilerTemperatureSensorismissing(input B)
SENSOR
E2
BoilerTemperatureSensorShortcircuit(input B)
IGNITION
FAIL
Failureingnition
DHW
E1
Water Heater Temperature Sensor is missing
(input WH)
DHW
E2
Water Heater Temperature Sensor Short circuit
(input WH)
FROST
The room temperature is below 0°C. Danger of
freezing of heat carrier inside the boiler water
jacketofboilerandheatingsystemtubing.
When restarting the controller alarm is deactivated.
Notify the authorized installer/ service to be
performed immediately inspection of the boiler
and heating installation.
”С” symbol  means that the motor of
automaticcleaning systemisactivated.
Thesymbol“T”indicatesthataroom
thermostat is connected to the
controlleroftheburner(theboiler).
In “CH Priority” mode the room thermostat controls the
burnerbystartingandstoppingit.In“DHW Priority”mode
theroomthermostatcontrolstheheatinginstallationpump
by starting it when the temperature of the domestic hot
water has reached the maximum preset temperature. In
“Parallel Pumps” mode the room thermostat controls the
heatinginstallationpumpregardlessofthetemperatureof
domestic hot water. In “Summer Mode” the room
thermostatisdisabled.
Lights for operating:
-Pump heating system
-Pump Domestic hot water.
10.2. User menu
10.2.1. Initial (start-up screen) „Standby“
Theburnerisinstandbymode.
The display shows:
Temperature in the boiler (23
degrees),time,andbypressingthe
Enter button you can browse the
quickmenu(bottomleft)wherethe
followingread-onlydataisdisplayed:
Maximum set temperature t = 85°C, emperature of
domestichotwaterwheresuchheatingcircuitisconnected);
Lightintensityintheburner;Burnerstatus(detectederrors,
ifany);Date.
Setmaximumtemperatureofthe
boilerthroughnavigationarrows.
Press button „F” and hold for
3 seconds to set the follow
parameters:
ManuallystartingAshcleansystem
whenfueliswithhighashcontent
or boiler is operating in Manual
mode.
Setstart-upCentral Heating pump
temperature.
On/Offand DHWpump hysteresis
curve setup (effective only with
activatedDHW Pump).
Setthetime.
Setthedate