gerkros KST - Purpose of use; Technical description

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Purposeofuse:
Technicaldescription
ThetyperangeofATTACKKT,KSTcondensationwallboilersisproducedwithmodulating
outputof7-25kW,whichmeansthatbytheinstantneedforheatintheobjecttheboiler
choosesoptimalheatingoutput.ATTACKboilersareusedforcentralheatingoffamily
houses,flats,shopsandsimilarplaceswherethefuelisnaturalgas.
Astouse,theboilerisbuilttooperatewithheatingwatertomaximumhydrostaticpressureof
0,3Mpa(3bar)andoperatingtemperatureto85ºCwithconnectiontoheatingcircuitswith
forcedflowofwaterintheclosedsystem.Waterintheheatingcircuitmustsuittostandards
bySTN077401(itmustnotbesourinanycase,whichmeansthatitmusthavethepH-value
higherthen7andminimumcarbonatehardness,max.3mval./1-1)Fillingpressureincold
systemisof11,5bar.Fillingmustbedoneslowlyforairbubblestoescapethroughproper
deareatingvalves.Foradjustingthewaterhardnessintheheatingsystemitisnecessarytouse
recommendedagents.
CondensationwallgasboilerATTACKKTisamodernsourceofthermalenergysuitablefor
heatingandpreparationofhotwaterinanexternaltank.ThecondensationKSTboileris
equippedwithaspecialsecondaryboardheat-exchangerwherehotwaterispreparedby
through-flowheating.ATTACKcondensationboilersareequippedwitaspecialsteeltwo-
chamberheatexchanger.Inthefirstchamber(non-condensationchamber)wastegas
transfersheatbutdoesnotcondensate.Inthesecondone(condensationchamber)wastegas
condensatesandtransferssocalledcondensationheatpresentinwastegastoheatingwater.In
thisprocess,acondensateisproducedwhichiscollectedbycondensatecollectorandled
throughasiphonawayfromtheboiler.Theheatexchangerisequippedwithtwoelectrodes.
Oneofthemservesforburning,theotheroneforionizationflameguardingintheheat
exchanger.Ontheheatexchangerthereisalsoanautomaticdeareatingvalveandheatsensor
foroutcomingheatingwater.Removablewalloftheheatexchangerisequippedwitharing
burnerandpipebringingamixtureofgasandairtoaburningspace.Gasismixedwithairina
deviceconsistingofgasvalveandaVenturitube.
Inletofairforburningisenabledbyafanwithcontinuouslycontrolledrevolutionswhich
allowsoutputmodulationoftheboilerinawiderange.Wastegasisdrawnbyacoaxialor
doublewastegasexhaust.CirculationofheatingwaterisdonebyaGrundfoscirculation
pump.Inthecaseofhigherpressureintheheatingcircuit(when,forexample,alltheheadsof
heatingbodiesareclosed),intheboilerthereisaby-passvalvethatopensashortcircuitinthe
boilerandtheoutputismodulatedwithoutanynegativeconsequences.Formeasuring
temperatureandpressuretherearesensorswhichshowthevaluesonthedisplayoftheboiler.
ControlofATTACKKT,KSTcondensationboilersprovidesanextremelycomfortable
attendance.Theremotecontroloftheboilerisdonebyalltheaccessibleperipheraldevice
thatiscompatibleincommunicationwithOPENTHERM.Equithermalregulationprovides
economyoffuelanddiminishedwearofsinglecomponents.Thisregulationtakescareof
propertemperatureofheatingwaterbythecalculationaccordingtooutsidetemperature.The
displayaswellascontrolbuttonsarelaidoutonthecontrolboard.Fortherightoperationof
theboilerthereisamicroprocessorunitthatmonitorsandevaluatesinstantaneousconditions
oftheboilertoreachoptimizationandeconomyoffuelformaximumutilizationofthe
appliance.
Inthecaseofnotfollowingtherulesabovethereisnoguarantee
fordamagedcomponents.