Baxi 47 075 35 Versionshinweis

UKCompNo5122323Iss138/12

Installation&ServicingInstructions

DuotecCombiHEARange

GasFiredWallMountedCondensingCombinationBoiler

TheseinstructionsincludetheBenchmarkCommissioningChecklistandshouldbeleftwiththeuserforsafekeeping.

©BaxiHeatingUKLtd2012

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NaturalGas

BaxiDuotecCombi24HEA

G.C.No4707535

BaxiDuotecCombi28HEA

G.C.No4707536

BaxiDuotecCombi33HEA

G.C.No4707537

BaxiDuotecCombi40HEA

G.C.No4707538

TheBenchmarkScheme

Benchmarkplacesresponsibilitiesonbothmanufacturersandinstallers.Thepurposeistoensurethatcustomersareprovidedwiththe

correctequipmentfortheirneeds,thatitisinstalled,commissionedandservicedinaccordancewiththemanufacturer'sinstructionsby

competentpersonsandthatitmeetstherequirementsoftheappropriateBuildingRegulations.TheBenchmarkChecklistcanbeusedto

demonstratecompliancewithBuildingRegulationsandshouldbeprovidedtothecustomerforfuturereference.

Installersarerequiredtocarryoutinstallation,commissioningandservicingworkinaccordancewiththeBenchmarkCodeofPractice

whichisavailablefromtheHeatingandHotwaterIndustryCouncilwhomanageandpromotetheScheme.Visitwww.centralheating.co.uk

formoreinformation.

©BaxiHeatingUKLtd2012Allrightsreserved.

Nopartofthispublicationmaybereproducedortransmittedinanyformorbyanymeans,orstoredinanyretrievalsystemofanynature

(includinginanydatabase),ineachcasewhetherelectronic,mechanical,recordingorotherwise,withoutthepriorwrittenpermissionofthe

Applicationsforthecopyrightowner'spermissiontoreproduceormakeotheruseofanypartofthispublicationshouldbemade,giving

detailsoftheproposeduse,tothefollowingaddress:

TheCompanySecretary,BaxiHeatingUKLtd,

BrooksHouse,CoventryRoad,Warwick.CV344LL

Fullacknowledgementofauthorandsourcemustbegiven.

WARNING:Anypersonwhodoesanyunauthorisedactinrelationtoacopyrightworkmaybeliabletocriminalprosecutionandcivilclaims

fordamages.

BuildingRegulationsandtheBenchmarkCommissioningChecklist

BuildingRegulations(England&Wales)requirenotificationoftheinstallationofaheatingappliancetotherelevantLocalAuthorityBuilding

ControlDepartment.From1April2005thiscanbeachievedviaaCompetentPersonsSelfCertificationSchemeasanoptiontonotifying

theLocalAuthoritydirectly.SimilararrangementswillfollowforScotlandandwillapplyinNorthernIrelandfrom1January2006.

TheHealth&SafetyExecutiveoperatesthe'GasSafeRegister',aselfcertificationschemeforgasheatingappliances.

ThesearrangementsrepresentachangefromthesituationwherebycompliancewithBuildingRegulationswasacceptedasbeing

demonstratedbycompletionoftheBenchmarkLogbook(whichwasthenleftonsitewiththecustomer).

WiththeintroductionofSelfCertificationSchemes,theBenchmarkLogbookisbeingwithdrawn.However,asimilardocumentintheform

ofacommissioningchecklistandserviceintervalrecordisincorporatedatthebackoftheseinstructions.

ThiscompanyisamemberoftheBenchmarkinitiativeandfullysupportstheaimsoftheprogramme.Itsaimistoimprovethestandards

ofinstallationandcommissioningofcentralheatingsystemsintheUKandtoencouragetheregularservicingofallcentralheating

systemstoensuresafetyandefficiency.

BuildingRegulationsrequirethatinstallationsshouldcomplywithmanufacturer'sinstructions.Itisthereforeimportantthatthe

commissioningchecklistiscompletedbytheinstaller.TherelevantsectionofBuildingRegulationsonlyrelatestodwellings.Thereforethe

checklistonlyappliesiftheapplianceisbeinginstalledinadwellingorsomerelatedstructure.

TheflowchartBelowgivesguidanceforinstallersontheprocessnecessarytoensurecompliancewithBuildingRegulations.

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InstallerNotificationGuidelines

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IMPORTANTInstallation,Commissioning,Service&Repair

Thisappliancemustbeinstalledinaccordancewiththemanufacturer'sinstructionsandtheregulationsinforce.Readtheinstructionsfully

beforeinstallingorusingtheappliance.

InGB,thismustbecarriedoutbyacompetentpersonasstatedintheGasSafety(Installation&Use)Regulations.

Definitionofcompetence:ApersonwhoworksforaGasSaferegisteredcompanyandholdingcurrentcertificatesintherelevantACS

modules,isdeemedcompetent.InIE,thismustbecarriedoutbyacompetentpersonasstatedinI.S.813"DomesticGasInstallations".

Theadditionofanythingthatmayinterferewiththenormaloperationoftheappliancewithoutexpresswrittenpermissionfromthe

manufacturerorhisagentcouldinvalidatetheappliancewarranty.InGBthiscouldalsoinfringetheGasSafety(InstallationandUse)

Regulations.

WarningChecktheinformationonthedataplateiscompatiblewithlocalsupplyconditions.

AllGasSaferegisteredengineerscarryanIDcardwiththeirlicencenumberandaphotograph.Youcancheckyourengineerisregistered

bytelephoning08004085500oronlineatwww.gassaferegister.co.uk

TheboilermeetstherequirementsofStatutoryInstrument"TheBoiler(Efficiency)Regulations1993No3083"andisdeemedtomeetthe

requirementsofDirective92/42/EEContheenergyefficiencyrequirementsfornewhotwaterboilersfiredwithliquidorgaseousfuels:

TypetestforpurposeofRegulation5certifiedby:

NotifiedBody0085.

Product/Productioncertifiedby:

NotifiedBodies0085&0086.

ForGB/IEonly.

Legislation

Thiscompanydeclarethatnosubstancesharmfultohealtharecontained

intheapplianceorusedduringappliancemanufacture.

TheapplianceissuitableonlyforinstallationinGBandIEandshouldbeinstalledinaccordancewiththerulesinforce,andonly

usedinasuitablyventilatedlocation.

InGB,theinstallationmustbecarriedoutbyaGasSafe

RegisteredInstaller.Itmustbecarriedoutinaccordancewiththerelevantrequirementsofthe:

GasSafety(Installation&Use)Regulations.

TheappropriateBuildingRegulationseitherTheBuildingRegulations,TheBuildingRegulations(Scotland),BuildingRegulations

(NorthernIreland).

TheWaterFittingsRegulationsorWaterByelawsinScotland.

TheCurrentI.E.E.WiringRegulations.

Wherenospecificinstructionsaregiven,referenceshouldbemadetotherelevantBritishStandardCodeofPractice.

InIE,theinstallationmustbecarriedoutbyacompetentPersonandinstalledinaccordancewiththecurrenteditionofI.S.813'Domestic

GasInstallations',thecurrentBuilding

RegulationsandreferenceshouldbemadetothecurrentETCIrulesforelectricalinstallation.

Allsystemsmustbethoroughlyflushedandtreatedwithinhibitor(seesection6.2).

CodesofPracticerefertothemostrecentversion

InGBthefollowingCodesofPracticeapply:

Standard Scope

BS6891 GasInstallation.

BS5546 Installationofhotwatersuppliesfordomesticpurposes.

BSEN12828 Heatingsystemsinbuildings.

BSEN14336 Installation&commissioningofwaterbasedheatingsystems.

BS6798 Installationofgasfiredhotwaterboilers.

BS5440Part1 Flues.

BS5440Part2 Ventilation.

BS7074 Expansionvesselsandancillaryequipmentforsealedwatersystems.

BS7593 Treatmentofwaterindomestichotwatercentralheatingsystems.

InIEthefollowingCodesofPracticeapply:

Standard Scope

I.S.813 DomesticGasInstallations.

Thefollowingstandardsgivevaluableadditionalinformation;

BS5546 Installationofhotwatersuppliesfordomesticpurposes.

BSEN12828 Heatingsystemsinbuildings.

BSEN14336 Installation&commissioningofwaterbasedheatingsystems.

BS7074 Expansionvesselsandancillaryequipmentforsealedwatersystems.

BS7593 Treatmentofwaterindomestichotwatercentralheatingsystems.

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SafeManualHandling

General

Thefollowingadviceshouldbeadheredto,fromwhenfirsthandlingtheboilertothefinalstagesofinstallation,andalsoduring
maintenance.
Mostinjuriesasaresultofinappropriatehandlingandliftingaretotheback,butallotherpartsofthebodyarevulnerable,particularly
shoulders,armsandhands.
Health&SafetyistheresponsibilityofEVERYONE.
Thereisno'safe'limitforonemaneachpersonhasdifferentcapabilities.TheboilershouldbehandledandliftedbyTWOPEOPLE.
Donothandleorliftunlessyoufeelphysicallyable.
WearappropriatePersonalProtectionEquipmente.g.protectivegloves,safetyfootwearetc.
Preparation
Coordinatemovementsknowwhere,andwhen,youarebothgoing.
Minimisethenumberoftimesneededtomovetheboilerplanahead.
Alwaysensurewhenhandlingorliftingtherouteisclearandunobstructed.Ifpossibleavoidsteps,wetorslipperysurfaces,unlitareasetc.
andtakespecialcareonladders/intolofts.
Technique
Whenhandlingorliftingalwaysusesafetechniqueskeepyourbackstraight,bendyourknees.Don'ttwistmoveyourfeet,avoid
bendingforwardsandsidewaysandkeeptheloadasclosetoyourbodyaspossible.
Wherepossibletransporttheboilerusingasacktruckorothersuitabletrolley.
Alwaysgriptheboilerfirmly,andbeforeliftingfeelwheretheweightisconcentratedtoestablishthecentreofgravity,repositioningyourself
asnecessary.Seethe'Installation'sectionoftheseinstructionsforrecommendedliftpoints.
Remember
Thecircumstancesofeachinstallationaredifferent.Alwaysassestherisksassociatedwithhandlingandliftingaccordingtotheindividual
conditions.
IfatanytimewheninstallingtheboileryoufeelthatyoumayhaveinjuredyourselfSTOP!!
DONOT'workthrough'thepainyoumaycausefurtherinjury.
IFINANYDOUBTDONOTHANDLEORLIFTTHEBOILEROBTAINADVICEORASSISTANCEBEFOREPROCEEDING!!
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CONTENTS
1.0Introduction
2.0GeneralLayout
3.0ApplianceOperation
4.0TechnicalData
5.0DimensionsandFixings
6.0SystemDetails
7.0SiteRequirements
8.0FlueOptions
9.0PlumeDisplacement
10.0Installation
11.0Commissioning
12.0Completion
13.0Servicing
14.0ChangingComponents
15.0SettingtheGasValve
16.0Electrical
17.0ShortPartsList
18.0FaultFinding
BenchmarkChecklist
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1.0Introduction

1.1Description

1.TheBaxiDuotecCombiHEAisafullyautomaticgasfiredwallmountedcondensingcombinationboiler.Itisroomsealedandfan

assisted,andwillservecentralheatingandmainsfeddomestichotwater.

2.Theboilerissettogiveamaximumoutputof:

24models 24kWDHW

 21kWCH(Condensing)

28models 28kWDHW

25.9kWCH(Condensing)

33models 33kWDHW

 30.3kWCH(Condensing)

40models 40kWDHW

 34.4kWCH(Condensing)

3.ItisdesignedforuseonNaturalGas(G20).

4.Theboilerissuitableforuseonlyonfullypumpedsealedheatingsystems.Priorityisgiventodomestichotwater.

5.Theboilerdatabadgegivesdetailsofthemodel,serialnumberandGasCouncilnumberandissituatedontheinnerdoorpanel.Itis

visiblewhenthecasefrontpanelisremoved(Fig.1).

6.Theboilermodelnameandserialnumberarealsoshownontheinformationlabelontheundersideofthefacia.Thisisforuser

reference.

7.Theboilerisintendedtobeinstalledinresidential/commercial/lightindustrialE.M.C.environmentsonagovernedmetersupply

only.

8.Theboilermustbeinstalledwithoneofthepurposedesignedfluessuchasthestandardhorizontaltelescopicfluekit,partno.

5118069.

9.Allsystemsmustbethoroughlyflushedandtreatedwithinhibitor(seesection6.2).

Fig.1

Important:Iftheboilerisinstalledatahighpointinthesystemitisstrongly

recommendedthatAutomaticAirVentKit720004701isfitted.

1.2OptionalExtras

Integraltimers,RFroomthermostatsetc.areavailableasoptionalextras.

1.3ContentsofPack

Thepackcontains:

Boiler

WallPlate(includingtaps)

SetofPipeConnections

Template&'QuickFit'Guide

LiteraturePack

FillingLoop

page7

2.0GeneralLayout

2.1Layout



1. ExpansionVessel

2. AutomaticAirVent

3. DHWPlateHeatExchanger

4. CirculationPump

5. DrainOffPoint

6. PressureReliefValve

7. SelectorSwitch

8. CentralHeatingSystemPressureGauge

9. PCB

10. ControlBox

11. 3WayValveAssembly

12. CondensateTrap

13. FlameSensingElectrode

14. SparkElectrode

15. PrimaryHeatExchanger

16. FanAssembly

17. On/Off/ResetSelectorSwitch

18. CentralHeatingTemperatureControl

19. HotWaterTemperatureControl

20. Venturi

21. Air/GasCollector

22. CombustionBoxCover&Burner

23. Igniter

24. BurnerOnLight

25. CentralHeatingModeLight

26. DomesticHotWaterModeLight

27. Display

28. PositionofOptionalIntegralTimer

page8

3.0ApplianceOperation

3.1CentralHeatingMode(Fig.2)

1.Withademandforheating,thepumpcirculateswaterthroughtheprimarycircuit.

2.Oncemainburnerignitesthefanspeedcontrolsthegasratetomaintaintheheatingtemperaturemeasuredbythetemperature

sensor.

3.Whentheflowtemperatureexceedsthesettingtemperature,a3minutedelayoccursbeforetheburnerrelightsautomatically(anti

cycling).Thepumpcontinuestorunduringthisperiod.

4.Whenthedemandissatisfiedtheburnerisextinguishedandthepumpcontinuestorunforaperiodof3minutes(PumpOverrun).

CentralHeatingCircuit

Fig.2

Key

1 PrimaryHeatExchanger 14 GasInlet

2 Burner 15 DomesticHotWaterOutlet

3 IgnitionElectrodes 16 HeatingFlow

4 FlameSensingElectrode 17 PressureGauge

5 GasValve 18 WaterPressureSensor

6 Pump 20 Fan

7 AutomaticAirVent 21 DiverterValveAssembly

8 PlateHeatExchanger/AutomaticBypass 22 DiverterValveMotor

9 FlowSensorwithFilter&Regulator 23 DomesticHotWaterFlowTemperatureSensor

10 PressureReliefValve 24 SafetyThermostat

11 BoilerDrainPoint 25 CentralHeatingTemperatureSensor

12 HeatingReturn 26 ExpansionVessel

13 ColdWaterInletOn/OffValveandFilter  

3.2DomesticHotWaterMode(Fig.3)

1.Priorityisgiventothedomestichotwatersupply.Ademandatataporshowerwilloverrideanycentralheatingrequirement.

2.TheflowofwaterwilloperatetheHallEffectSensorwhichrequeststhe3wayvalvetochangeposition.Thiswillallowthepumpto

circulatetheprimarywaterthroughtheDHWplateheatexchanger.

3.Theburnerwilllightautomaticallyandthetemperatureofthedomestichotwateriscontrolledbythetemperaturesensor.

4.Whenthedomestichotwaterdemandceasestheburnerwillextinguishandthedivertervalvewillremaininthedomestichotwater

mode,unlessthereisademandforcentralheating.

DomesticHotWaterCircuit

Fig.3



IMPORTANT:Whentheselectorswitchisinthe'0'(Off)positiontheelectricalsupplytotheboilerisisolated.

Theboilerwillnotoperateandtheintegraltimerwillrequireresettingoncetheselectorswitchissettoeither

Position(i)orPosition(ii).

3.3FrostProtectionMode

1.Thefrostprotectionmodeisintegraltotheapplianceandfunctionsonlywiththeselectorswitch(seeSection2.1)inthedomestic

hotwaterandcentralheatingposition.Ifthesystemtemperaturefallsbelow5°Cthentheboilerwillfireonitsminimumsettinguntil

aflowtemperatureof30°Cisreached.Furtherprotectioncanbeincorporatedbyusingasystemfrostthermostat.

3.4PumpProtection

1.Withtheselectorswitch(seeSection2.1)ineitherthecentralheatingorcentralheatinganddomestichotwaterposition,thepump

willautomaticallyoperatefor1minuteinevery24hourstopreventsticking.

page9

4.0TechnicalData

4.1DuotecCombi24,28,33&40HEA



ApplianceType C13 C33 C53

ApplianceCategory  CATI2H 

HeatInputCH (Net) Max Min

24model kW 20.5 7

28model kW 24.7 9

33model kW 28.9 9.7

40model kW 32.8 9.9

HeatInputCH(Gross) Max Min

24model kW 22.7 7.8

28model kW 27.4 10

33model kW 32.1 10.8

40model kW 36.4 11

   

HeatOutputCH (NonCondensing) Max Min

24model kW 20 6.8

28model kW 24 8.7

33model kW 28 9.4

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