The Greenstar Highflow CDi Gas-fired Condensing Combi .
The Greenstar Highflow CDi gas-firedcondensing combi boiler seriesTechnical and specification informationNEWPRODUCT1
Worcester and you. Making a difference.Working together for many years, heatingWe’re a leading British company,professionals and Worcester have beenemploying approximately 2,000 people atmaking a real difference in hundreds ofour headquarters and manufacturingthousands of homes across the UK. We areplants in Worcester and at Clay Cross inrecognised as a market leader in highDerbyshire, including a nationwide networkefficiency, condensing boiler technology andof over 300 Service Engineers and over 80are also committed to providing renewabletechnically-trained Field Sales Managers.energy solutions.As part of Europe’s largest supplier ofAs part of the Bosch Group, our products areheating products, Worcester, Bosch Groupdesigned and manufactured to provide thehas the UK-based resources and supporthigh levels of quality and reliability which arecapability to offer you the value-addedsynonymous with the Bosch namesolutions we feel you deserve.throughout the world.2
Worcester, Bosch Groupheadquarters“At Worcester we recognise the vital roleContentsPageyou, our customer, has in the specificationThe Greenstar Highflow CDi gas-fired4-7and installation of ‘A’ rated, energy efficientcondensing combi boiler seriesappliances in homes across the UK. We willOptional plug-in controls8-9continue to invest in our products, people,Technical data10facilities and added value services such asThe inside story11training, to give you the support you requireInstalling the Greenstar Highflow CDi boiler series12 - 19in providing a total solution for yourGreenstar Highflow CDi series horizontal20 - 21customers’ comfort.”fluing optionsGreenstar Highflow CDi series vertical22 - 23Richard Soper,fluing optionsManaging Director, Worcester, Bosch GroupPlume management system options24 - 27Installation requirements28 - 30The Greenstar Highflow CDi series accessories31 - 32After-sales33Worcester training34 - 353
The Greenstar Highflow CDicondensing combi boiler seriesThe Greenstar Highflow CDi series is part of a marketThe Greenstar Highflow CDi condensing boiler seriesleading range of energy-saving condensing floor standingdelivers this energy-saving performance by recyclinggas-fired combi boilers.exhaust gases to extract the latent heat – a highly efficientuse of energy which also significantly reduces carbonHigher efficiency therefore highly cost effectivedioxide emissions into the atmosphere.All of the new Greenstar Highflow CDi condensing combiTo all these major benefits you can add yet more: renownedboilers are SEDBUK A rated. This means they have anWorcester quality and reliability; outputs and flow rates toaverage annual efficiency of 90.8%, standard efficiencycomfortably satisfy the heating and hot water demands ofboilers achieve around 78% efficiency. Therefore bythe larger household and all-round value for money.upgrading to a Greenstar Highflow CDi boiler, consumerscan reduce their gas bills as well as their carbon footprint.4
The Greenstar Highflow CDicombi series at a glanceFeatures20 & 25 litre/minuteflow rateOutput kWto DHWMinMaxFlow rate at 35ºC Δ TCH temperaturecontrolDHW temperaturecontrolNatural gasLPG boilerElectronic ignitionSEDBUK 7.4kW9.7kW29.5kW41.1kW20l/min*25l/min* A (90.8%)A (90.8%)*Provided adequate mains water pressure and flow is available – see page 29 forfurther detailsBuilt-in condensatepump – 4.5m headBenefitsNEWNEWSuitable for largerfamily homesIncreases siting possibilitiesEarth bonding stripLabour and money savingRoll-in boilerMinimises risk ofdamaging floorsBuilt-in filling linkLabour and money savingTemperature controlConsumer-friendlyfor CH DHWand energy savingMulti-directional Condensfit IISiting flexibilityfluing – compatible withplume managementFloor mountedAllows pre-filling of systempre-plumbing jigand no pipe fabricationrequiredElectronic ignitionUNIQUENEWFEATURESEnergy savingBuilt-in frostMoney saving,protectioneconomical protectionPump seizure protectionPrevents call-backsFault finding diagnosticsTime savingAnti-cycle deviceEnergy savingNo ventilation grillesLabour and money savingrequired in compartmentsOptional plug-in twinNo electrician requiredchannel programmer5
The Greenstar Highflow CDi condensing combi boiler seriesA condensing boiler is more efficient due to its ability toModulating central heating and hot water outputsextract more heat from the flue gases normally lost to thecombined with separate consumer controls, also meanenvironment through the flue system.that comfortable temperature levels for both can be setindependently of each other.Greenstar Highflow CDi combis use a proven aluminiumsilicon heat cell with an extra large surface area.Greenstar Highflow CDi combis are supplied as standardsuitable for sealed primary water systems. The applianceAs the flue gases pass through the heat exchanger thiscontains a 12 litre expansion vessel, 3bar pressure reliefextra surface area cools the flue gases to around 55 C atvalve, pressure gauge and an automatic air vent. Thewhich point the latent heat within is released. This is heatappliance cannot be used on an open vent system.that would normally be lost to the atmosphere.FluingIt is this ability to extract as much heat as possible fromGreenstar Highflow CDi combis are available as a multi-the gas it burns that gives Greenstar Highflow CDi combisdirectional room-sealed fanned flue appliance.an exceptionally high level of operating efficiency.GasThis higher efficiency is recognised within section L of theThe Greenstar Highflow CDi is manufactured in both naturalBuilding Regulations, subsequently achieving a higher SAPgas and Liquid Petroleum Gas (LPG) variants.or NHER rating.The separate plated DHW heat exchanger combined withthe thermal store ensures that hot water is deliveredinstantly to the outlet being operated.The advantages of a combi boilerA combi (or combination boiler) is a compact and highlySo you not only save space, but also reduce hot water costsefficient unit giving all the heating and hot water you need,– which can account for up to 60% of a typical domesticwith significant savings on running and installation costs.fuel bill.Unlike a conventional heating and hot water system, aA combi also supplies hot water at mains pressure, givingcombi boiler system does not store domestic hot water. Ityou powerful showering without the need for a pump. Andheats water directly from the cold water mains – as you useas, on average, a shower uses considerably less water thanit. There’s no hot water cylinder, no tank in the loft (and soa typical bath, the savings on hot water costs and waterless risk of freezing and flooding), and none of theconsumption can be significant.connecting pipework.RegularCombiboiler layoutboiler layoutFeed andexpansioncisternCold waterstorage cisternHot water cylinderHot water tobaths, showersand basins etcPumpHot water to baths, showersand basins etcMotorisedvalveProgrammerWorcesterregular boilerRoomthermostatRoomthermostatWorcestercombi boilerwith programmerCold mains6
Operation Worcester Greenstar Highflow CDi combis can be sitedunderneath a worktop as servicing can be undertakenHot water modefrom the front. A removable section of worktop isWith the appliance in a standby condition, i.e. thermal storerecommended should you require top access foror heatbank at temperature set by the hot water thermostat,maintenance worka demand for hot water will cause the flow turbine toenergise the pump and circulate primary hot water aroundHot water performancethe boiler and the plated water to water heat exchanger. Theburner will ramp-up at its maximum setting and modulateGreenstar Highflow 440CDiaccordingly to maintain the temperature of the heatbank.continue to operate until the heatbank has returned to therequired temperature.Priority is always given to the production of domestic hotwater. Should the central heating be in operation when a hotwater demand is made, the supply to the radiators will beTemperature ºC T42.5When hot water is no longer required the appliance willtemporarily interrupted.50 litres4072 litres37.5100 litres35130 litres32.530Central heating mode182litresNormal bathing temperature1 2 3 4 5 6 7 8 9 10On a demand for central heating the pump will energise,Time in minutesNominal flow rate 4.4gpm (20l/min)Cold water inlet 10ºC (50ºF)the diverter valve will open and primary water will circulatearound the heating system. The burner will light at theminimum setting and ramp upwards to meet the systemdemand. The radiators will heat up to the temperature setGreenstar Highflow 550CDiby the fascia mounted heating temperature controller42.5Application of Greenstar Highflow CDi combis Worcester Greenstar Highflow CDi combis deliverdomestic hot water at a flow rate of 20 litres/min (4.4gpm)& 25 litres/min (5.5gpm), making the appliances ideallysuited for use in medium to large sized family homes,Temperature ºC T(assuming there are no TRVs on the radiators).incorporating up to three bathrooms4037.53532.530 As the Worcester Greenstar Highflow CDi combis deliver42.5 litres70 litres98 litres135 litres183 litresNormal bathing temperature1 2 3 4 5 6 7 8 9 10hot water at mains pressure, they are ideally suited toTime in minutesNominal flow rate 5.5gpm (25l/min)Cold water inlet 10ºC (50ºF)providing a powerful shower Worcester Greenstar Highflow CDi combis can be sitedwhere space and water storage is a problem Worcester Greenstar Highflow CDi combis may be used toprovide domestic hot water only, with radiators beingFluingGreenstar Highflow CDi combis feature 2 different sizes ofmulti-directional RSF flue systems, 100mm or 125mm dia.added at a later dateThe flue can be run horizontally or vertically with The fluing options available with Greenstar Highflow CDiadditional 90º or 45º in-line bends allowing changes ofcombis, both horizontal and vertical, offer excellent scoperoute or direction, providing an extremely flexible andfor siting the appliance, particularly in kitchens, airingversatile fluing system enabling the appliance to be sitedcupboards, etcvirtually anywhere. More details are shown on page 20.7
Optional plug-in controlsGreenstar Highflow CDi floor standing condensing combi boilers are available with a range of easy-to-use controls. Thesefascia-mounted controls offer simple plug-in connection to the boiler circuit board.Mechanical timersMT10 mechanical timerThe simplest Worcester control device – an easy-to-use analogue clock for setting heatingtime periods. It plugs into the boiler fascia via a pre-prepared plug and socket.MT10RF mechanical RF thermostatHas an analogue display for setting night and day time periods and temperature. Thereceiver plugs into the boiler and is activated remotely by the RF (radio frequency)controller, which requires no wiring. So installation is clean and simple – no disturbance tofloorboards or carpets. Nor is there any need for a separate room thermostat.These mechanical timers do not control domestic hot water pre-heat. If this function isrequired please select a digital programmer. Alternatively, an additional single channel timerfor hot water control, could be wired in remotely.Digital and wireless programmers and room thermostatsDT20RF digital RF thermostat with twin channel programmerA wall-mounted RF room thermostat with digital display, combined with a twin channeldigital timer in the boiler fascia. The fascia mounted programmer benefits from automatictime and date setup, automatic summer/wintertime changeover and a backlight for use inlow light conditions.DT20 twin channel digital programmerA versatile, easy-to-learn, 7 day, digital programmer offering up to 3 on/off settings per day.The programmer has a host of innovative features including automatic setup, which setsthe correct time and date at power-up, automatic summer/wintertime changeover and agreen backlight for use in low light conditions.DT10RF digistatA familiar wall-mounted 24 hour programmable RF digital thermostat combined with afascia mounted single channel programmer to time the hot water combi preheat functions.The programmer includes a built-in receiver for the room thermostat and all of thefunctionality of the DT20.8
DT10RF optimiserA seven day digital programmable RF thermostat with a seven day programmer/receiver inthe boiler fascia for hot water. The transmitter is the tried and tested Optimiser asavailable with other Worcester boilers. The optimum start feature, where the thermostatdelays the firing of the boiler until necessary, is a useful energy-saving option.TD200 text display*A seven day programmer with easy-to-use text display with automatic time and date setup,automatic summer/winter time changeover and a backlight for use in low light conditions.Three on/off periods can be set per day. The TD200 can be fascia mounted or hard wiredoutside the boiler using the optional wall mounting socket. The TD200 features an easy-touse full text display providing more information than standard digital controls. A hard wiredroom thermostat is available to provide optimum start functionality.RT10 room thermostat*A hard wired optimising room temperature controller with digital display for use with theTD200. The display shows current and desired temperature and an advance button allowsthe user to move to the next heating switch point.TD200 wall mounting socket*A Worcester branded wall mounting socket which allows the TD200 to be hard wired awayfrom the boiler.*All three of the above are classed as an Intelligent Combi package.Increased SAP ratingsAs well as the Greenstar Highflow CDi appliances achievingvery high SAP ratings for dwellings, the addition of theoptimising temperature controller further increases theseratings as well as being part of the recommended bestpractice, as covered by the CHeSS design standard.TD200 text display9
Technical data – Greenstar Highflow CDi seriesModelGreenstar Highflow 440CDiGreenstar Highflow 550CDiHeight (mm)850850Width (mm)600600Depth (mm)600600Weight – dry (kg)112112SEDBUK value % / band – natural gas90.8%/Band A91%/Band ASEDBUK value % / band – LPG92.2%/Band A92.2%/Band AHeating flow / return connections22mm compression22mm compressionHot / cold water connections22mm compression22mm compression1515Pressure relief valve (mm dia.)Condensate connection22mm plastic pipe22mm plastic pipeGas connection22mm compression22mm compressionPrimary water content (litres)5151Min. domestic inlet pressure formax. DHW flow rate (bar)1.51.7Min. domestic inlet pressure tooperate the appliance (bar)0.50.5Max. domestic inlet pressure (bar)1010DHW flow rate @ 35ºCΔT (l/min)2025Output to central heatingkW(Btu)7.4 - 29.29.7 - 30.6(25,590 - 99,630)(33,096 - 104,407) Floor mounted pre-plumbing jigFilling linkPlug-in timer(optional) (optional) Fault diagnostic displayDigitalDigitalMax. vertical flue (mm)(100mm dia.) inc. terminal6,4006,400Max. vertical flue (mm)(125mm dia.) inc. terminal15,00015,000Max. horizontal flue (mm)(100mm dia.)4,0004,000Max. horizontal flue (mm)(125mm dia.)13,00013,000NOx classificationClass 5Class 5Condensate disposal pump10
The Greenstar Highflow CDi condensingcombi boiler series – inside story131212113141516171845610789Key to components10. Gas valve1. Control panel11. Heat cell2. Tank over heat thermostat12. Gas burner/spark electrodes3. Tank temperature sensor13. Combustion air modulating fan4. Heat store14. On/off button5. Plate DHW heat exchanger15. Central heating temperature control6. Filling loop isolation valve16. Digital display7. Water flow sensor turbine17. Domestic hot water temperature control8. Expansion vessel18. Pressure gauge9. Circulating pump11
Installing the Greenstar HighflowCDi seriesSiting of applianceSite preparation/portabilityGeneralGreenstar Highflow CDi appliances are supplied with a floorThe appliance is not suitable for external installation. Themounted pre-plumbing jig. The jig enables all gas and waterfloor on which the boiler is to be mounted should beservices to be pre-plumbed and tested prior to fitting thecapable of supporting an overall weight of approximatelyboiler.160kg.For ease of installation the appliance has a roll-in boiler trayClearanceswhich allows it to be rolled into place once the connectionsThe following clearances should be allowed for installationhave been made.and servicing.Pipework connections and casing dimensionsInstallation clearancesThe minimum space required to install the boiler only.1,200mm610mm600mm1,450mmA5mm5mmCB600mmCabinet dimensions (mm)Service clearancesA850B600C600The minimum space required to service the boiler only.1,200mm610mm865mm15mmA5mmBC5mm250mm*Pipework connectionsA CH flow*Space required for unvented areas with a removable door or panel12DE600mm22mmB DHW flow22mmC Gas inlet22mmD Cold main inlet22mmE CH return22mm
Condensate disposalNever terminate or discharge into any open source,including: sink, bath, shower, bidet, toilet etc.All condensing boilers generate condensate dischargewhich needs to be piped away from the appliance using aNote: any external condensate pipework should be protectedplastic pipe.with weather resistant insulation to help prevent freezing.The amount of condensate generated depends on theThe condensate connection on Worcester appliances is inefficiency and operating status of the appliance. Depending22mm polypropylene. The pipe should be extended andon operating temperatures, the appliance will condense inrun away from the appliance with a constant fall of 3º or atboth heating and hot water modes and may generate upleast 50mm in every metre away from the boiler.to 2.7 litres of condensate per hour for the 440CDi and3.7 litres per hour for the 550CDi.The condensate pipe can terminate into any one of fourareas (see next page).Condensate termination and routeWhilst all of the methods are acceptable it is best practiseGreenstar Highflow CDi combis incorporate a condensateto terminate the condensate pipe via an internal wastepump which allows condensate to be plumbed above thesystem. This will eliminate the need for any externalboiler, allowing more flexible siting possibilities.condensate pipe runs which can be susceptible to freezingin extreme weather. Best practise is not to run externalCondensate connectioncondensate pipe any further than 3m. If it is necessary toThe condensate pump fills up and periodically dischargesrun more than 3m externally increase pipe size to 32mm.through the flexible condensate pipe between 200mm and4,500mm from floor level. After this point the condensatecontinues down the 22mm rigid pipework to the outletusing gravity.Cut offexcesspipeworkMax. 4,500mmMin. 200mmCondensate pump The flexible plastic pipe can be reduced in length to suitthe installation circumstances. The pipework must followone of the options shown on the next page.13
Condensate termination and routeCondensingboilerCondensingboilerVisible air breakat plug hole100mm22mm min. dia.Insulationor increasepipe sizeOpen end ofcondensatedrainage pipedirectly intogully belowgrating butabove waterlevelSink withintegraloverflow22mm min. dia.plastic pipe75 mmmin.Minimum450mmand up to3 storeysInvert75mm sinkwaste trapInternal sink/washing machine drainSoil and vent stack22mm min. dia. condensatedrainage pipe, max externallength 3 metres500mm min.Soil & vent stackCondensingboilerInsulation orincrease pipe sizeExternal drainpipe into foulwater sewerCondensate drainagepipe can be run aboveor below groundDiameter 100mmmin. plastic tubeBottom oftube sealedLimestonechippings25mm22mm min. dia. plasticcondensate drainagepipe running throughthe external wallAir gapInsulation orincrease pipe sizeDrainage holes43mm 90 M & F bendHole depth400mm min.by 300mm dia.External condensate absorption point (unsuitable for clay soil types)14Externalair breakExternal air break when using a foul water down pipe68mm dia.PVC-u strapon fitting
External condensate pipeworkBoiler location and clearancesThe Worcester Greenstar Highflow CDi appliances have aThis boiler is only suitable for installing internally within acondensate pump rather than a syphonic condensate trap.property at a suitable location on a fixed, rigid non-Rather than the condensate constantly dripping into thecombustible surface of at least the same size as the boilerdischarge pipe, the condensate is collected in the pumpand capable of supporting the boiler weight.which releases it in 100ml quantities. This will help preventfreezing occurring.Compartments: Follow the requirements of BS 6798 andBS 5440 Part 2 and note:Wherever possible the condensate discharge pipeworkshould be routed and terminated internally. Should this not Minimum clearances must be maintainedbe possible, and the only available route is external, thefollowing conditions should be observed: An access door is required to install, service and maintainthe boiler and any ancillary equipment The pipework length should be kept to a minimum and the route as vertical as possibleIf fitting the boiler into an airing cupboard use a noncombustible perforated material (maximum hole sizes of Where pipework could be subjected to extreme cold or13mm) to separate the boiler from the airing space.wind chill, a weather proof insulation should be used.Alternatively, the condensate pipework could beUnvented compartment clearancesincreased to a minimum 32mm.The diagram shows the minimum space required to installand service the boiler inside an unvented compartment.Compartment installation800mm800mmThe appliance may be installed in any room, although50mmparticular attention is drawn to the requirements of theIEE regulations applicable and in Scotland the electricalprovisions with respect to installation in a room containing900mma bath or shower.Air supply100mm**1. The room in which the appliance is installed does notrequire a dedicated air vent.100mm**200mm*2. If the appliance is installed in a cupboard orcompartment with dimensions that allow the followingminimum clearances, then no ventilation is required:Compartment installationPosition of applianceMin. unventilated clearanceIn front75mm*Right side100mmLeft side100mmAbove flue elbow/casing*Space required for unvented areas with a removable door or panel.**This space can be reduced to 50mm for one side only as along as both the sideclearances add up to the total of both the side measurements shown or more.50mm*75mm from an opening door. 600mm is required for servicing15
Airing cupboard clearancesVenting compartmentsThe diagram below shows the minimum space required toIf the clearances are less than those stated for the optionsinstall and service the boiler within an airing cupboard.above then ventilation must be provided as described inBS 5440.A minimum of 2 air vents (A) must be fitted, one at low800mm625mmlevel and another at high level onto the same wall using thesame air for circulation.Minimum free air required for venting:100mm2,300mm25mm For air directly from outside:440CDi 155cm2 per vent200mm550CDi 220cm2 per vent 100mmFor air from internal space/room:440CDi 310cm2 per vent550CDi 440cm2 per vent25mm100mmA16
Boiler location & clearancesBathroomsIMPORTANT:Any switch or appliance control using mains electricity mustA boiler with a mechanical timer or RF mechanical timernot be within reach of a person using the bath or shower.with a room thermostat must only installed outside theshaded area.Electrical switches, fused spurs and socket outlets must notbe situated in the bathroom.Additional Residual Current Device (RCD) protection maybe required.A boiler fitted with a non-mechanical timer or with no timercan be installed in zone 2 or outside the shaded area.Refer to the latest IEE wiring 750mm2,250mm21122,250mm600mm radius17
Flue terminal positioningGeneral position1. The terminal must not cause an obstruction nor the4. The air inlet/outlet duct and the terminal of the boilerdischarge a nuisance. Particular care should bemust not be closer than 25mm to any combustibleexercised with regards to the pluming of the fluematerial. Detailed recommendations on protection ofgases and any increase in noise levels.combustible materials are given in BS 5440:1.2. If a terminal is fitted less than 2 metres above aThe flue system must be installed and terminated insurface to which people have access, then a guardaccordance with the recommendations of BS 5440:Part 1.must be fitted. A terminal protective guard is availablefrom Tower Flue Components, Vale Rise, Tonbridge.Tel: (01732) 351555. The terminal guard must besecurely fixed to the wall using suitable plugs andcorrosion resistant screws. The guard must such that300mm500mm clearance to any verticalstructure on a roof, 600mm to roomsealed flue or 1,500mm to an open flue.there is a gap of 50mm between the end of theterminal and be symmetrically positioned about the500mmterminal assembly and spaced the condensecompatible guard.Velux window3. In certain weather conditions, a white plume ofcondensation will be emitted from the flue terminaland siting where this could be a nuisance, i.e. nearsecurity lighting, should be avoided.200mmDrainpipe200mm below eaves and75mm below gutters,pipes and drains.600mm distance to a boundary,unless it will cause a nuisance.BS 5440: Part 1 recommends thatcare is taken when siting terminalsin relation to boundaries.25mm 300mm600mm minimumclearance from askylight to avertical flue.1,500mm500mm600mm500mm600mmWindoBoundaryThe flue turret has a built-in angle of 3 to ensure that the condensate flowsback to the boiler for safe disposal via the condensate waste pipe.All horizontal flue sections must rise by 3 or at least 50mm for each metreaway from the boiler to ensure condensate flows back into the boiler.181,000mm1,000mm50mm fall100mm fall
If plume management is utilised, the clearance from the flueair inlet to any opening can be decreased to 150mm in allcases, as long as the clearance from the flue outlet to anyopening is maintained as shown on this diagram.Flue exhaust outletNote: when fitting the plumemanagement kit beneath abalcony, a minimum of500mm must be maintainedbetween the air inlet &flue exhaust outlet.NOTES:Plume management kits are available for100mm horizontally terminated flues.Please refer to the installation instructionssupplied with the plume management kits.If plume redirection is utilised, theclearance from any opening must beincreased in the direction of theplume to 1,500mm.Air intakeOpening in building1,500mm between a verticalDormer flue terminal and a windowwindow or dormer window.Min.1,500mmDirection offlue discharge1,500mm400mm2,000mm below a Veluxwindow, 600mm above or toeither side of the Velux window.ow400mm from a pitchedroof or in regions withheavy snow fall 500mm.Plume deflectorThe flue cannot be lower than 1,000mmfrom the top of a light well due to thebuild up of combustion products.1,200mm1,200mm betweenterminals facing each other.300mm300mm to aninternal orexternal corner.300mm300mm300mm above,below and eitherside of an openingdoor, air vent oropening window.NOTE: All measurements are the minimumclearances required. Terminals mustbe positioned so to avoid combustionproducts entering the building.Clearance no less than 200mm from thelowest point of the balcony or overhang.NOTE:Installations in carportsare not recommended.300mm500mmVertical flue clearance 500mmto non-combustible buildingmaterial, and 1,500mmclearance to combustiblebuilding material.1,200mm from an opening on thesame wall (ie: door or windowleading into a dwelling) in a carportwith both sides open, to prevent thebuild up of combustion products.Flue clearances must be at least 300mm from theground. Terminal guards must be fitted if the flue isless than 2 metres from the ground or if a personcould come into contact with the flue terminal.19
Greenstar Highflow CDi combi boilerhorizontal fluing optionsGreenstar Highflow CDi combis offer a choice of 2 differentThe following criteria should be noted when planning thesized horizontal RSF flue systems, 100mm diameter andinstallation.125mm diameter. The systems have different maximum The concentric flue system must be inclined at 3ºlengths. Options 1 to 8 detail the permissible lengths.(52mm per metre) from the appliance, to allowcondensate to drain back into the boiler.Horizontal RSF flue Because the appliance operates at high efficiency aFlue diameter100mm125mmwhite plume of condensation will be emitted from theterminal. Care must be taken when selecting the flueMinimum flue length130mm350mmMaximum flue length4,000mm13,000mmterminal position (see pages 18 - 19).Option 1100mm dia. telescopic flue kitExtension rear flue horizontal flue assemblyComprises:1 x internal flue connector bend1 x flue adaptor1 x flue connector2 x wall cover plates530mm (100mm dia.) of flue duct including terminalPart No. 7 716 191 155125mm dia. standard flue kitComponents required1 x internal flue connector bendMaximumlength (m)1 x flue adaptor60/10041up to 41 x flue connector80/125131up to 122 x wall cover plates965mm (125mm dia.) of flue duct including terminalOption 2Part No. 7 716 191 157Extension rear flue horizontal using a 90º bendAccessoriesComponentsPart no.Description60/100 530mm7 716 191 155 Horizontal telescopic kit7 716 191 083 60/100 1m extension7 716 191 084 60/100 90º bendComponents required7 716 191 085 60/100 45º bendMaximumlength (m)7 716 191 133 60/100 Short flue extension60/1002.51up to 2180/125111up to 1017 716 191 164 60/100 Vertical flue adaptor7 716 191 157 80/125 965mm Horizontal flue kit7 719 003 666 80/125 1m extension7 719 003 664 80/125 90º bend7 719 003 665 80/125 45º bend7 716 191 165 80/125 Vertical flue adaptor*The 100mm flue system inclines 2º within the 100mm terminal.20Deduct 750mm off the total flue length for every45º
The Greenstar Highflow CDi condensing combi boiler series The advantages of a combi boiler A combi (or combination boiler) is a compact and highly efficient unit giving all the heating and hot water you need, wi
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