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Rinnai INFINITY gas continuous flow water heatingSpecification guide: A-Series, EF26, HD49, and N-Series
ImportantRinnai is constantly improving its products, and as such, information andspecifications are subject to change without notice. For the most up-todate information, go to www.rinnai.co.nz.Help is hereFor more information about buying, using, and servicing of Rinnaiappliances call 0800 RINNAI (0800 746 624).Rinnai New Zealand Limited105 Pavilion Drive, Mangere, AucklandPO Box 53177, Auckland Airport, Auckland 2150Phone:Email:Web:09 257 om/rinnainzwww.facebook.com/rinnainz
ContentsLeaders in gas continuous flow.4Rinnai INFINITY range.5What is continuous flow.6Model selection for residential applications.7Location of a Rinnai INFINITY.8Product specification pagesRinnai INFINITY A-Series.10Rinnai INFINITY EF26.12Rinnai INFINITY HD49 and HD250 range.14Rinnai INFINITY N-Series.16Rinnai INFINITY accessory matrix.18Rinnai INFINITY internal flueing.20Rinnai INFINITY accessory product pagesDigital controllers.26Metal recess box.28Pipe covers.29Rinnai INFINITY flue diverters.30N-Series N56kWi flue diverter kit.32Security bracket.33Commercial error switch.34EZ HD connect cable.34N-Series cascade cable, and pump cable.35HD manifolding (MECS).34AppendicesAppendix 1: Water flow and gas usage.38Appendix 2: Rinnai INFINITY inbuilt frost protection.46Appendix 3: Gas boosted solar.47Appendix 4: Rinnai INFINITY Limited Warranty.48Appendix 5: LPG gas bottle consumption and clearances.52Appendix 6: The future of gas in New Zealand.53
Leaders in gas continuous flowWhen you turn on a tap you want water at the righttemperature fast, which is why over the years we’vedevoted considerable time and resource to leadingedge research and development.We were the first to introduce continuous flowtechnology and have been tirelessly working onimproving this ever since.Rinnai INFINITY continuous flow technology timeline4 Rinnai INFINITY CFHW specification guide 06-21
Rinnai INFINITY rangeThe Rinnai INFINITY range is made up of four categories to cater for a variety of hot water demandsand installation requirements.CategorySuitabilityRinnai INFINITY A-SeriesImproved accessibility foreasier and faster serviceResidential applications onlyRinnai INFINITY HDHeavy duty on demand fordemanding jobsResidential and commercialapplicationsRinnai INFINITY N-SeriesCondensing technology todeliver higher efficiencies.Residential and commercialapplicationsRinnai INFINITY EF26Condensing technology,replacing the EF24.Residential applications onlyModelMounting positionInputOutputThermal efficiencyon highStatusmonitorA16External16.3-124 MJ/h27.8 kW80.5%NoA20External19.9-156 MJ/h34.9 kW80.5%NoA24External16.3-184 MJ/h42.0 kW81%NoA26External16.3-199 MJ/h44.5 kW80.5%NoA28iInternal11.0-210 MJ/h48.8 kW83.5%YesEF26External16.3-175 MJ/h44.5kW91.5%NoN49kWiInternal11.0-210 MJ/h48.8 kW83.5%YesN49kWeExternal11.0-210 MJ/h48.8 kW83.5%YesHD250External20.0-249 MJ/h57.8 kW83%NoN56kWiInternal16.0-209 MJ/h55.5 kW97%YesN56kWeExternal16.0-209 MJ/h55.5 kW97%YesService and maintenanceFor reliable operation Rinnai INFINITY continuous flow water heaters in residentialapplications should be serviced every two years. For commercial applications Rinnaihas a maintenance and servicing schedule, please contact us for more information.Rinnai INFINITY CFHW specification guide 06-21 5
What is continuous flow?A continuous flow hot water system only heats water when it passes through the unit. It will deliverheated water at a predetermined flow rate, depending on the model, as long as the unit is connectedto power and gas.General principle of operationEach Rinnai INFINITY has a number ofcomponents that control the water temperatureand water flow. These are:They do this by preheating the incoming waterthrough the transfer of heat from the exhaustgas, which in a standard unit would otherwisebe wasted. Water then flows to the primary heat exchangerand is heated. as the water is alreadypreheated it uses less gas to reach the requiredtemperature.PCB (onboard computer)water flow control valvewater flow sensormodulating gas valveoutlet water temperature sensorWhen a tap is turned on the unit senses theneed to start. The combustion fan starts,ignition begins (electronic requiring electricity),and the gas valve opens. Once the flame isestablished the appliance will heat the waterthrough the heat exchanger (as required) untilthe tap is turned off.What is condensing continuous flow?The Rinnai N-Series and EF26 utilisecondensing technology to deliver higherefficient water heaters, requiring less gas tooperate. These water heaters, via a secondaryheat exchanger, unlock energy that wouldotherwise be wasted.Standard continuous flow - generalprinciple of operationStandard water heaterPrimaryheatexchangerExhaust temp.approx 200 ºCHeatexchangerModulatinggas valveSecondary latentheat exchangerPrimaryheatexchangerExhaust temp.approx 60 ºC91%efficiencyPCBCombustionfan80%efficiencyEF26 Condensing water C230-240 VHot wateroutletWater inletGasWater flow sensorWater control nectionsPlease noteThe N-Series models utilise the latest condensing technology. The way they operate differs from the EF26 shownabove. The latest N-Series models have the highest thermal efficiency of the INFINITY range at 97%.6 Rinnai INFINITY CFHW specification guide 06-21
Model selection for residential applicationsWhen specifying residential applications there are some questions you need to ask when selectinga model or models. Keep in mind future requirements of the building. Water heating solutionsshould be designed to the number of hot water outlets and not the number of people.How many bathrooms?An A16 or A20 unit may be suitable for a onebathroom home, a two or three bathroom homewill need a larger Rinnai INFINITY, or evenmultiple units.Where are the bathrooms and other hotwater outlets in the building?Where are the bathrooms and other hot wateroutlets in relation to where the water heater isto be installed. In most cases it is better to sitethe Rinnai INFINITY closer to the kitchen wherethere is an immediate demand for hot water. Ifbathrooms are situated at opposite ends of thehouse two units may be required.Simultaneous demand?How likely will hot water outlets, such asshowers, be used at the same time?Scenario one: Two bathroom home with acouple who rarely use the second shower—anA20 may be suitable.Scenario two: Two bathroom home with afamily of five who fight for two showers in themorning—a larger Rinnai INFINITY would beneeded.What type of tapware is installed?There is a large range of tapware in themarket, some with very high flow rates. Themain consideration is the type of shower roseinstalled and how many litres it puts out—typical flow rates for showers is around8-12 L/min. This needs to be factored whendetermining the model. To measure the flowrate of a shower, hold a bucket under theshower rose for one minute and measure thewater volume.Location in New Zealand?Ambient water temperatures will varythroughout the country, especially in winter.This is important when determining incomingwater temperature and the temperaturerequired at the hot water outlet, as this willaffect how much hot water the unit can deliver.For more information refer to Appendix 1 onp.38 and the below model selection graph.Model selector exampleDetermine the hot water outlets thatwill run simultaneously and list theflow rates against them.Hot wateroutletTypicalflow rateBathroom 19 L/minWorkedexampleIn the column for the geographical region move down until a numberbigger than your total DEF26 &N-Series9L16131116HD49 (28)EF26 (26)Bathroom 29 L/min9L20171420HD49 (28)EF26 (26)Kitchen6 L/min6L24201724HD49 (28)EF26 (26)Laundry6 L/min*OtherAllow6 L/min26221926HD49 (28)N56 (32)TOTAL24 L* Some washing machines, particularlyfront loaders, have a cold-onlyconnection as they have an internalheater. Hot water in this instancewould not need to be factored into thiscalculation.30262226HD250 (32)N56 (32)32272328iHD250 (32)N56 (32)Read across the model, e.g. for 24 litres per minute in the mild zone an A26 isselected. If you find the flow rate is greater than the figures listed in the tableplease contact Rinnai for advice. Multiple units or an alternative hot water heatingsolution may be required.Rinnai INFINITY CFHW specification guide 06-21 7
Location of a Rinnai INFINITYTo provide safe and effective water heating it is important to adhere to all the relevant gas installationstandards. If in doubt it pays to consult a licensed gasfitter to double check where the unit can belocated.General installation considerationsThe Rinnai INFINITY should be placed asclose as possible to the most frequently usedhot water outlet(s) to minimise the delay forhot water. In most cases it’s better to site theunit closer to the kitchen where there is animmediate demand for hot water.For installations where the distance betweenthe water heater and outlets is considerable,a flow and return system with a buffer tankcan be used to minimise the waiting time forhot water. Alternatively multiple units can bestrategically placed to serve different outlets.Operating noiseSome people are susceptible to low level noise.Rinnai INFINITY units operate at around50-54 dB(A). This needs to be considered iflocating the appliance near a bedroom.Easy accessAll continuous flow water haters must beinstalled so that access can be gained forservicing and repair without hazard or unduedifficulty.If mounting the unit at height the owner mustarrange permanent and safe access, or provideanother means of safe access such as scissoror boom lifts.GENERAL FLUE Min. 300 mmMin. 500 mmBMin. 300 mmMin. 500 mmCMin. 1.5 mMin. 1.5 mDMin. 500 mmMin. 500 mmEMin. 300 mmMin. 300 mmFMin. 300 mm*Min. 300 mm2GMin. 300 mmMin. 300 mmExternal modelsExternal models are designed for outdoorinstallations only. They must be located aboveground where products of combustion canbe naturally dispersed. They should not bein enclosed areas as the unit can suffocateon its own flue gases, which will cause theunit to malfunction. Refer to the general flueclearances diagram below.Internal modelsInternal models aredesigned for indoorinstallations only. Theyare a flued appliance.They may be installedin an enclosure if therequirements ofAS/NZS 5601.1 are met.An enclosure is defined asa compartment, enclosedarea, or partitioned offspace primarily used forthe installation of theappliance.Example of an internalunit installed in acupboard - RinnaiAuckland showroomFor internal units we recommend a 600 mmclearance in front of the unit for servicingaccess. This can be reduced to 50 mm ifinstalled in a cupboard, refer clearances below.External modelsInternal models75 mmmin.G75 mmmin.600 mm min.(50 mm min if in a cupboard)Below eaves, balconies, and other projections, min. 300 mm.From a gas meter 1000 mm. From an electricity meter or fuse box, min. 500 mm.12If the HD49kWe is downrated to a 26 L unit (MJ rating decreases) then the clearances shift to the A-Series / EF26 columnRinnai recommend 1.5 m to give enough clearance for the pipe work, and to safely expel flue gases.8 Rinnai INFINITY CFHW specification guide 06-21
Rinnai INFINITYproduct specification pagesInstant vs continuous flow hot waterIf an outlet is more than 15 m away from the INFINITY there could be a time delay for hot waterof approximately 10-15 seconds. To minimise hot water delivery times, pipe sizing, INFINITYmodel selection and location are important. Consult a licensed gasfitter for more information.Rinnai INFINITY CFHW specification guide 06-21 9
Rinnai INFINITY A-SeriesDescriptionDesigned and made in Japan, the Rinnai INFINITY A-Series are gascontinuous flow hot water heaters with inbuilt frost protection. They haveelectronic ignition and require electricity to operate. They are factorypreset to deliver water at 55 C. The internal unit (A28i) is a room sealedappliance.Scope of useSuitable for RESIDENTIAL applications only. The external units aredesigned to be externally mounted on an outside wall. The internal A28iunit is designed for internal installations only and can be installed in anenclosure if the requirements of AS/NZS 5601.1 are satisfied. They aredesigned to be located as close as practicable to the most frequentlyused hot water outlets to reduce the delay for hot water delivery.Not suitable as a spa or swimming pool heater, or for hydronicapplications. The external units are also not suitable as a gas boost forsolar installations as the temperature cannot be set high enough.Hard or acidic water will need to be treated to use this product.A16 externalA20 externalA24 externalA26 externalA28i1 internalREU 837FF-ZKCode Natural GasINFA16NINFA20NINFA24NINFA26NINFA28FFNCode LPGINFA16LINFA20LINFA24LINFA26LINFA28FFLThermal efficiency on high80.5%80.5%81%80.5%83.5%Hot water capacity21.5-20 L/min1.5-24 L/min1.5-26 L/min1.5-26 L/min1.4-37 L/minHot water capacity at a 25 rise16 L/min960 L/h20 L/min1200 L/h24 L/min1440 L/h26 L/min1560 L/h28 L/min1680 L/hInput16.3-124 MJ/h19.9-156 MJ/h16.3-184 MJ/h16.3-199 MJ/h11-210 MJ/hOutput27.8 kW34.9 kW42 kW44.5 kW48.8 kWWeight13 kg14 kg15 kg15 kg21 kgNominal operating pressure120-1000 kPa160-1000 kPa200-1000 kPa200-1000 kPa200-1000 kPaConnection - hotR ½ (15 mm)R ¾ (20 mm)R ¾ (20 mm)R ¾ (20 mm)R ¾ (20 mm)Connection - coldR ½ (15 mm)R ¾ (20 mm)R ¾ (20 mm)R ¾ (20 mm)R ¾ (20 mm)Connection - gasR ¾ (20 mm)R ¾ (20 mm)R ¾ (20 mm)R ¾ (20 mm)R ¾ (20 mm)Ingress protection ratingIPX4IPX4IPX4IPX4IPX2Noise level (1 m) away54 dB(A)55 dB(A)54 dB(A)55 dB(A)54 dB(A)Power consumption normal standby frost protection47 W2W68 W58 W2W68 W56 W2W68 W66 W2W68 W66 W2W104 W1The A28i model, while part of the A-Series range, looks different to the external units—refer image on p.5. This model is suitable asa gas boost for solar installations as the temperature can be set to 75 C—refer system layout diagram on p.47.2The higher figures for the A16, A20, A24, and A28i are only applicable in areas where the incoming water temperatures are high, forexample 20 C. Rather than all the water going through the heat exchanger, some of the water will go through the bypass tubeallowing a greater capacity of water to be delivered.10 Rinnai INFINITY CFHW specification guide 06-21
3512702593512232123514915A2041357171235128811510 43 (variable)95.364.667.89.1A24 & .2 74.6495.8571.2A16-A26440A28i70.129.5Connection dimensions under unitA16-A263A28i21321Gas connection from wallGas connection from centreGas connection length from base62 mm83 mm40 mm89 mm89 mm36.4 mm2Cold water inlet from wallCold water inlet from centreCold water inlet length from base53 mm10 mm50 mm60.1 mm27 mm46.1 mm3Hot water outlet from wallHot water outlet from centreHot water outlet length from base72 mm105 mm41 mm (A16—39 mm)81.1 mm110 mm36.3 mm1Rinnai INFINITY CFHW specification guide 06-21 11
Rinnai INFINITY EF26DescriptionDesigned and made in Japan, the Rinnai INFINITY EF26 is anexternal gas condensing continuous flow hot water heater withinbuilt frost protection. It has electronic ignition and requireselectricity to operate. It is factory preset to deliver water at 55 C(maximum set temperature is 65 C).Scope of useSuitable for RESIDENTIAL applications only. The EF26 isdesigned to be externally mounted on an outside wall and locatedas close as practicable to the most frequently used hot wateroutlets to reduce the delay for hot water delivery.It is not suitable as a spa or swimming pool heater, or for hydronicapplications. It is also not suitable as a gas boost for solarinstallations as the temperature cannot be set high enough.Hard or acidic water will need to be treated to use this product.REU numberE2626W-ZKCode Natural GasINFEF26NCode LPGINFEF26LThermal efficiency on high91.5%Hot water capacity1.5-26 L/minHot water capacity at a 25 rise26 L/min1560 L/hInput16.3-175 MJ/hOutput44.5 kWWeight18 kgNominal operating pressure220-1000 kPaConnection - hotR ¾ (20 mm)Connection - coldR ¾ (20 mm)Connection - gasR ¾ (20 mm)Connection - condensateR ½ (15 mm)Ingress protection ratingIPX5Noise level (1 m) away50 dB(A) approx.Power consumption normal standby automatic frost protection63 W2W92 WPlease noteJoining units together is not possible. The EF26 model is unable to be electronically manifolded.12 Rinnai INFINITY CFHW specification guide 06-21
16.544.435133018012Neutraliser drain outletCold water inletNeutraliser tank drain valve16Cable accessPower supply cableHot water outlet16.583335.647.8 (cold)207126.846.4 (gas)88.1 (hot)347122 (drain)531498Gas connection270180160805.5 x 24long hole2515281913513.95.5 x 16long hole551.2535.2495.2565.2495.8446Ø13 hole30.5Rinnai INFINITY CFHW specification guide 06-21 13
Rinnai INFINITY HD49 and HD250DescriptionDesigned and made in Japan, the Rinnai INFINITY HD units aregas continuous flow hot water heaters with inbuilt frost protection.They have electronic ignition and require electricity to operate.The internal unit is a room sealed appliance. The INFINITYHD250 is factory preset to 55 C, the HD49 units are factorypreset to 75 C.Scope of useSuitable for residential and commercial applications. The externalHD49kWe / HD250 units are designed to be externally mountedon an outside wall. The internal HD49kWi is designed for internalinstallations only and can be installed in an enclosure if therequirements of AS/NZS 5601.1 are satisfied. They are designedto be located as close as practicable to the most frequently usedhot water outlets to reduce the delay for hot water delivery.HD49kWe externalmodel picturedThey are not suitable as a spa or swimming pool heater, or forhydronic applications.Hard or acidic water will need to be treated to use this product.HD49kWe externalHD49kWi internalHD250 externalREU numberVCM2837WC-ZKVCM2837FFC-ZKVR3237WG-ZK(S)Code Natural GasINFHD49NINFHD49FFNINFHD250HNCNCode LPGINFHD49LINFHD49FFLINFHD250HNCLThermal efficiency on high83.5%83.5%83%Hot water capacity11.4-37 L/min1.4-37 L/min3.2-37 L/minHot water capacity at a 25 rise28 L/min1680 L/h28 L/min1680 L/h32 L/min1920 L/hInput11-210 MJ/h11-210 MJ/h20-249 MJ/hOutput48.8 kW48.8 kW57.8 kWWeight20 kg21 kg29 kgNominal operating pressure200-1000 kPa200-1000 kPa200-1000 kPaConnection - hotR ¾ (20 mm)R ¾ (20 mm)R ¾ (20 mm)Connection - coldR ¾ (20 mm)R ¾ (20 mm)R ¾ (20 mm)Connection - gasR ¾ (20 mm)R ¾ (20 mm)R ¾ (20 mm)Ingress protection ratingIPX5IPX2IPX4Noise level (1 m) away52 dB(A)54 dB(A)50 dB(A)Power consumption normal standby automatic frost protection66 W2W104 W95 W2W120 W72 W2W116 W1The higher figures are only applicable in areas where the incoming water temperatures are high, for example 20 C. Rather than allthe water going through the heat exchanger, some of the water will go through the bypass tube allowing a greater capacity of waterto be delivered.14 Rinnai INFINITY CFHW specification guide 06-21
79583210 43 variableØ8131274.670.1 F/ C167.8297.7HD250244360064447021Connection dimensions under unitHD49kWeHD49kWiHD2501Gas connection from wallGas connection from centreGas connection length from base74.5 mm89 mm36.4 mm89 mm89 mm36.4 mm61 mm110 mm41 mm2Cold water inlet from wallCold water inlet from centreCold water inlet length from base45.6 mm27 mm46.1 mm60.1 mm27 mm46.1 mm99 mm52 mm51 mm3Hot water outlet from wallHot water outlet from centreHot water outlet length from base66.6 mm110 mm36.3 mm81.1 mm110 mm36.3 mm115 mm61 mm42 mmRinnai INFINITY CFHW specification guide 06-21 15
Rinnai INFINITY N-SeriesDescriptionDesigned and made in Japan, the Rinnai INFINITY N-Seriesare condensing continuous flow water heaters with inbuilt frostprotection. They have electronic ignition and require electricity tooperate. The internal unit is a room sealed appliance.The INFINITY N-Series units are factory preset to 55 C.Scope of useSuitable for residential and commercial applications. The externalN56kWe is designed to be externally mounted on an outside wall.The internal 56kWi is designed for internal installations only andcan be installed in an enclosure if the requirements of AS/NZS5601.1 are satisfied. They are designed to be located as close aspracticable to the most frequently used hot water outlets to reducethe delay for hot water delivery.N56kWe external model picturedThey are not suitable as a spa or swimming pool heater, forhydronic applications, or for domestic ring main applications1.Hard or acidic water will need to be treated to use this product.N56kWi internalN56kWe externalREU numberN3237FFUC-ZKN3237WC-ZKCode Natural GasINFN56FFNINFN56NCode LPGINFN56FFLINFN56LThermal efficiency on high97%97%Hot water capacity1.5-37 L/min1.5-37 L/minHot water capacity at a 25 rise32 L/min1920 L/h32 L/min1920 L/hInput16-209 MJ/h16-209 MJ/hOutput55.5 kW55.5 kWWeight29 kg29 kgNominal operating pressure300-1000 kPa300-1000 kPaConnection - hotR ¾ (20 mm)R ¾ (20 mm)Connection - coldR ¾ (20 mm)R ¾ (20 mm)Connection - gasR ¾ (20 mm)R ¾ (20 mm)Connection - condensateR ½ (15 mm)R ½ (15 mm)Ingress protection ratingIPX5IPX5Noise level (1 m) away49 dB(A)54 dB(A)Power consumption normal standby automatic frost protection70 W (NG), 85 W (LPG)2W150 W70 W (NG), 85 W (LPG)2W100 W21If a domestic ring main is req. we have a plumbing configuration, refer to the N-Series website product page for more information2The higher figures are only applicable in areas where the incoming water temperatures are high, for example 20 C. Rather than allthe water going through the heat exchanger, some of the water will go through the bypass tube allowing a greater capacity of waterto be delivered.16 Rinnai INFINITY CFHW specification guide 06-21
470276139.215.2654N56kWi725.667071.6Coaxial flue Ø80-125Cold water inletPressure relief valveHot water outletCondensate outletDRAINPRVGas 7.827615N56kWe654721.66708.543.8470157.5Pressure relief valveCold water inletHot water outletCondensate outletDRAINPRVGas 6142ManifoldingN56 models can be electronically connected (up to 24 units) using the N-Series cascade cable.Rinnai INFINITY CFHW specification guide 06-21 17
Rinnai INFINITY accessories matrixCONTROLLERSPart number DescriptionImageMC601ACompact controllerSuitable for all Rinnai INFINITY units1BC100V1ZBathroom Deluxe controllerSuitable for all Rinnai INFINITY units2MC100V1ZKitchen Deluxe controllerSuitable for all Rinnai INFINITY units3RECESS BOX1234R1405Metal recess boxSuitable for all A-Series external models4R1407Metal recess boxSuitable for EF26, HD49kWe, and HD2504There is no recess box available for the N56kWe due to the significant size ofthe unit.PIPE COVERSR1385A-Series white pipe coverSuitable for all A-Series external models5R1402SCHD250 silver pipe coverSuitable for the HD250 model only6R1415N-Series gunmetal grey pipe coverSuitable for the N56kWe / N56kWi models only7R1416EF26 white pipe coverSuitable for the EF26 only8R1417HD49 silver pipe coverSuitable for the HD49kWe / HD49kWi models only9SECURITY BRACKETACC1395Security bracketSuitable for ALL Rinnai INFINITY models568971111FLUE DIVERTERSFDS16ASideways A16 flue diverterSuitable for the A16 model only12FDS20Sideways A20 flue diverterSuitable for the A20 model only12FDS24Sideways A24/A26 flue diverterSuitable for the A24 and A26 models only12FDS26ESideways EF26 flue diverterSuitable for the EF26 model only13FDU16Upwards A16 flue diverterSuitable for the A16 model only14FDU24Upwards A24/A26 flue diverterSuitable for the A24 and A26 models only14FDU32Upwards HD250 flue diverterSuitable for the HD250 model only14FFP100DIVN-Series flue diverterSuitable for the N56kWi internal model only15There are no flue diverters for the HD49kWe18 Rinnai INFINITY CFHW specification guide 06-2112131415
ERROR SWITCHESPart number DescriptionImageR1070HD error indication switchSuitable for HD49kWe, HD49kWi and HD250models only1REUOPU3N-Series error indication switchSuitable for N56kWe and N56kWi models only2N-SERIES PUMP ACCESSORIESR1071N-Series pump cable 2 mSuitable for N56kWe and N56kWi models only3123CONNECTING CABLESREUEZCEZ connect cableSuitable for HD49kWe, HD49kWi, A28i, and HD250models only4REUMSBMHD internal master manifoldSuitable for HD49kWe, HD49kWi, and HD250models only-HD external master manifoldREUMSBMB Suitable for HD49kWe, HD49kWi, and HD250models only-REUMSBC1HD manifold slave cableSuitable for HD49kWe, HD49kWi, and HD250models only5REUMSBC2HD manifold joinerSuitable for HD49kWe, HD49kWi, and HD250models only-REUCSAC1N-Series cascade cableSuitable for N56kWe and N56KWi models only6456Rinnai INFINITY CFHW specification guide 06-21 19
Rinnai INFINITY internal flueingWith the introduction of the high efficiency N56kWi internal water heater, we now have three flueingoptions. These flueing options are specific to the model of water heater and type of installation,they CANNOT BE INTERCHANGED.Detailed in this section is a high level view of the options available and the flue components.HD49kWi and A28iN56kWi ONLYN56kWi ONLYIndividual flueingIndividual flueing (concentric)Common flueingStainless steel inner pipe andthermoplastic outer pipePolypropylene concentricflueingPolypropylene commonflueingNumber of bends123Number of bends4011223344556679111315Flue length (m)Flue length (m)07891112123Ø110 mmheader andflue4Ø110 mmheader andØ160 mm flueFor every 90 bend used, subtract 3 mfrom the lengths belowNo. ofwaterheatersMaximum flue length245 m45 m345 m45 m420 m45 m545 m645 m721 m1415171820Important and detailed information on each of the flueing options is available in the flueinginstallation guides available on www.rinnai.co.nz.20 Rinnai INFINITY CFHW specification guide 06-21
Internal flueing guidelinesThe flue terminal is to terminate in a location so as not to cause a nuisance, in accordance withAS/NZS 5601.Polypropylene flueing CANNOT be used for the HD49kWi / A28i internal water heaters.Flue gases from these units run much hotter than the N-Series and there is risk of theplastic flue components melting.Flue fall back to the water heaterThe flue terminal in all applications mustFALL BACK towards the water heater and nottowards to the flue terminal. The degree inwhich this occurs is dependent on the flueingapplication, refer below. Stainless steel flueing (HD49kWi / A28i)Slope horizontal flues back towards thewater heater at a 20 mm fall per meter todrain condensate. PP individual flueing (N56kWi)Slope horizontal flues back towards thewater heater at a 25 mm fall per meter todrain condensate. PP common flueing (N56kWi)Slope horizontal flues back towards thewater heater at a 54 mm fall per meter todrain condensate.CondensateThe condensate trap (HD49kWi and A28i)or condensate drain (N56kWi) collects anycondensate from the unit and prevents itentering the water heater and causing damage.Condensate is a by-product of high efficiencygas combustion and is mildy acidic. For thisreason copper tube and fittings must notbe used as it will corrode. Instead Rinnairecommends plastic pipe and fittings such asUPVC or PE.Handling condensate for the HD49kWi /A28iA condensate trap kit(FFSSCOND) is requiredfor lengths over 1.5 m. IfDrain tube capflueing is less than 1.5 mthe flue spigot on top ofthe unit is capped usingthe drain tube cap supplied with the unit.Handling condensate for the N56kWiA condensate trap kit is not needed for theN56kWi as there is a different method fordraining condensate. As there is a continuousflow of condensate being produced the unitmust be drained via a pipe to a suitabledischarge point. Refer to the install guide forfurther information.Vertical terminations (all applications)To ensure products of combustion are clearedadequate clearance from the building isrequired. The vertical cowl should have a500 mm clearance from any part of thebuilding. This also applies to steeped andpitched roofs, where the flue cowl should be500 mm clear of the ridge line. An adequateflow of fresh air must exist around the flue cowlfollowing installation.Minimum clearances are shown in AS/NZS5601.1.Flue supportsEnsure the flue is supported independentlyof the appliance by use of suitable clips orbrackets in accordance with AS/NZS 5601.For individual stainless steel and polypropyleneflueing, flue supports are supplied with eachroof cowl and flue pipe.For polypropylene common flueing, fluesupports are not provid
date information, go to www.rinnai.co.nz. Help is here For more information about buying, using, and servicing of Rinnai appliances call 0800 RINNAI (0800 746 624). Rinnai New Zealand Limited 105 Pavilion Drive, Mangere, Auckland PO Box 53177, Auckland Airport, Auckland 2150 Phone: 09 257 3800 Email: info@rinnai.co.nz Web: www.rinnai.co.nz
