The Service SectorThe Service SectorPrepares for HFOPrepares for HFO-1234yfPaul DeGuiseppi MACS WorldwidePaul DeGuiseppi MACS WorldwideMary Koban, DuPont FluoroproductsMary Koban, DuPont FluoroproductsAgendaHFO-1234yf Review1234yf ReviewService DifferencesService DifferencesTechnician TrainingTechnician TrainingRecovery/Recycle/Recharge EquipmentRecovery/Recycle/Recharge EquipmentStorage and HandlingStorage and HandlingHFO-1234yf Properties1234yf PropertiesPropertiesProperties1234yf134aPvap, MPa (25, MPa (25oC)0.6770.665Pvap, MPa (80, MPa (80oC)2.442.63GWP (100 ITH)GWP (100 ITH)41410ToxicityToxicityA-LowA-LowFlammabilityFlammabilityMildNoneTemperature,oCVapor PressureREFPROP EquationOf State available00.511.522.533.5-40 -20 0 20 40 60 80 100134aHFO-1234yf

Pressure (MPa)HFO-1234yf has vapor pressure, toxicity class A,similar to R-134a, but has mild flammabilityServicing DifferencesServicing DifferencesSome potential service differences for HFOSome potential service differences for HFO-1234yf are:1234yf are:Service shops and technicians may need to purchase/useService shops and technicians may need to purchase/usenew equipment (flammability/product differences)new equipment (flammability/product differences)ery/recycle/recharge equipmentRecovery/recycle/recharge equipmentRefrigerant identifiersRefrigerant identifiersLeak detection equipmentLeak detection equipmentHFO-1234yf refrigerant system components should not be1234yf refrigerant system components should not bereplaced with ones removed from a system that usesreplaced with ones removed from a system that usesanother type of refrigerant, or from a salvaged vehicleanother type of refrigerant, or from a salvaged vehicleReplacement evaporators should meet SAE J2842Replacement evaporators should meet SAE J2842HFO-1234yf is mildly flammable1234yf is mildly flammablePrecautions used with other flammables (gasoline, oil) arePrecautions used with other flammables (gasoline, oil) areable to HFOapplicable to HFO-1234yfServicing DifferencesServicing DifferencesSome potential service differences for HFOSome potential service differences for HFO-1234yf are:1234yf are:Lubricants used with HFOLubricants used with HFO-1234yf systems may be1234yf systems may bedifferent than those currently useddifferent than those currently usedHybrid compressors, driven by highHybrid compressors, driven by high-voltage electric motors, orvoltage electric motors, orequipped with hermetic mobile A/C systems, use different oilsequipped with hermetic mobile A/C systems, use different oilssary to check oil requirementsNecessary to check oil requirementsDo-it-yourselfers may charge nonyourselfers may charge non-approved refrigerantsapproved refrigerantsinto HFOinto HFO-1234yf systems1234yf systemsResult–refrigerant cross contaminationrefrigerant cross contaminationCould cause system failureand/or system misdiagnosesCould cause system failureand/or system misdiagnoses6Servicing DifferencesServicing DifferencesTypical OEM R-134a LabelProposed OEM HFO-1234yf LabelAdditional Information:Refrigerant flammability symbolJ2845 Technician Training for Safe Serviceand Containment of RefrigerantsServicing DifferencesServicing DifferencesR-134a ValveProp HFO-1234yf ValveSAE J639 AC System LowSide Quick Connect

N O T F I N A L IZ E DServicing Best PracticesServicing Best PracticesIn general, low lying areas, (such as workshop pits,shafts or cellar exits), may cause released refrigerantto pool as it is heavier than airCurrent regulations requirework areas to be adequatelyventilated and extraction units switched on if available.Refer to local, state and federal rules and regulationsregarding ventilation.Care should be taken to avoid over-charging of therefrigerant system.Service technicians should not smoke or have anyopen flame present while working on refrigerantcontaining systemsTechnician Training per SAE J2845Technician Training per SAE J2845Service RelatedService Related(1) Understand unique differences between R(1) Understand unique differences between R-1234yf and HFC1234yf and HFC-134a;(2) Identification of unique fittings/labels for each refrigeran(2) Identification of unique fittings/labels for each refrigerant along witht along withtank identification;tank identification;(3) How to use refrigerant identification equipment;(3) How to use refrigerant identification equipment;(4) How to use leak detection equipment and/or fluorescent dyes(4) How to use leak detection equipment and/or fluorescent dyestoidentify leaks with each refrigerant;identify leaks with each refrigerant;(5) System servicing practices (incl. proper recovery/recycling/(5) System servicing practices (incl. proper recovery/recycling/recharge)recharge)Safety and Environmental RelatedSafety and Environmental Related(6) Follow vehicle manufacturerrecommendations, to promote tech(6) Follow vehicle manufacturerrecommendations, to promote techniciansafety and minimize environmental impact using appropriatesafety and minimize environmental impact using appropriaterecovery, recycling and charging equipment;recovery, recycling and charging equipment;(7) Technicians must have a good understanding of the safety(7) Technicians must have a good understanding of the safetyrequirements defined in SAE J639.requirements defined in SAE J639.TechnicianOEM’s have requested this standard to providesimilar basis for technician refrigerant trainingTechnician Training per SAE J2845Technician Training per SAE J2845Intent of J2845 is to provide sufficient technician training, anIntent of J2845 is to provide sufficient technician training, and tohighlight refrigerant handling differenceshighlight refrigerant handling differencesR/R/R EquipmentR/R/R Equipment-J2843J2843 HFO-1234yf Recovery/Recycling/Recharging Equipment forFlammable Refrigerants for Mobile Air-Conditioning SystemsHighlights•Machines’ internal components reduce/minimize arcing/sparking•Machines will have additional cabinet ventilation•New hose connections will be required with HFO-1234yf (J639)•HFO-1234yf refrigerant cylinder color white with red band perJ639•New equipment will prevent re-charge if system has a leak.•Machine has 2-step process1. Vacuum Check•Pull vacuum, check for decays•If system decays, will stop machine2. Pressure Check•If vacuum does not decay, will add 10% charge•Monitor pressure, check for pressure decay•If the pressure decays, remaining 90% of therefrigerant will not be administered.Recovery EquipmentRecovery Equipment-J2851J2851 HFO-1234yf Recovery Only Equipment for FlammableRefrigerants for Mobile Air-Conditioning SystemsHighlights:•Machines’ internal components reduce/minimizearcing/sparking•Machines will have additional cabinet ventilation•New hose connections will be required with HFO-1234yf(J639)•HFO-1234yf Refrigerant cylinder color- white with redband per J639•New equipment will prevent re-charge if system has aleak.•Machine will RECOVER, even if there is a system leakStorage and Handling InformationStorage and Handling InformationHFO-1234yf package options exist for both disposable and1234yf package options exist for both disposable andreturnable containersreturnable containersDisposable packages limited to about 2 lb sizeDisposable packages limited to about 2 lb sizeCurrent DOT regulations prohibit packaging flammable gases in DOT39 disposable containers beyond 0.75 in39 disposable containers beyond 0.75 in3interior volume.interior volume.Returnable packages available in 2, 5, 10, 20 and 30 lb sizeReturnable packages available in 2, 5, 10, 20 and 30 lb sizeCurrently working with DOT to understand additional HFOCurrently working with DOT to understand additional HFO-1234yfdisposable packaging options.disposable packaging options.Check with your local, stateor federal agencies, as storage ofCheck with your local, stateor federal agencies, as storage ofmultiple containers of refrigerantmay be subject to regulation.multiple containers of refrigerantmay be subject to regulation.Refrigerant should always be stored in a cool, dry location,Refrigerant should always be stored in a cool, dry location,out of direct sunlightout of direct sunlightStorage and Handling InformationStorage and Handling Information•30 lb disposable containers•Light blue package colorR-134a•30 lb returnable containers•White with red band package colorPackages have about the same footprint, ie. They take about thesame floor space.HFO-1234yfHFO-1234yfSummarySummaryTo prepare for HFOTo prepare for HFO-1234yf service1234yf servicetechnicians will needtechnicians will need.....New recovery/recycle/recharge or recoveryNew recovery/recycle/recharge or recovery-only equipmentonly equipmentNew refrigerant identifierNew refrigerant identifierNew leak detection equipmentNew leak detection equipmentAssure adequate ventilation and follow flammable storageAssure adequate ventilation and follow flammable storagepractices per local, state and federal regulationspractices per local, state and federal regulationsAppropriate technician trainingAppropriate technician trainingThank You!Thank You!Please contact us atPlease contact us at....www.MACSW.orgwww.MACSW.orgwww.refrigerants.dupont.comwww.refrigerants.dupont.comwww.SmartAutoAC.comwww.SmartAutoAC.com