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Fujitsu AOAG09CPTA-V, AOAG12CPTA-V, AOAG18CPTA-V, AOAG24CPTA-V, AOGG09CPTA-V, AOGG12CPTA-V, AOGG18CPTA-V, AOGG24CPTA-V Installation guide

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PART No. 9377863515
EnglishViệt
INSTALLATION MANUAL
AIR CONDITIONER
Outdoor Unit
For authorized service personnel only.
HƯỚNG DẪN LẮP ĐẶT
ĐIỀUHÒAKHÔNGKHÍ
Dàn nóng
Chỉdànhchonhânviênbảodưỡngcóthẩmquyền.
9377863515_IM.indb 1 25/02/2020 14:55:42
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1. SAFETY PRECAUTIONS
Besuretoreadthismanualcarefullybeforeinstallation.
Thewarningsandprecautionsindicatedinthismanualcontainimportantinformation
pertainingtoyoursafety.Besuretoobservethem.
Handthismanual,togetherwiththeoperatingmanual,tothecustomer.Requestthecus-
tomertokeepthemonhandforfutureuse,suchasforrelocatingorrepairingtheunit.
WARNING
Indicatesapotentiallyorimminentlyhazardoussituationwhich,if
notavoided,couldresultindeathorseriousinjury.
Installation of this product must be done by experienced service technicians or
professionalinstallersonlyinaccordancewiththismanual.Installationbynonprofessional
orimproperinstallationoftheproductmaycauseseriousaccidentssuchasinjury,water
leakage,electricshock,orre.Iftheproductisinstalledindisregardoftheinstructionsin
thismanual,itwillvoidthemanufacturer’swarranty.
Toavoidgettinganelectricshock,nevertouchtheelectricalcomponentssoonafterthe
powersupplyhasbeenturnedoff.Afterturningoffthepower,alwayswait10minutesor
morebeforeyoutouchtheelectricalcomponents.
Donotturnonthepoweruntilallworkhasbeencompleted.Turningonthepowerbefore
theworkiscompletedcancauseseriousaccidentssuchaselectricshockorre.
Ifrefrigerantleakswhileworkisbeingcarriedout,ventilatethearea.Iftherefrigerant
comesincontactwithaame,itproducesatoxicgas.
Installationmustbeperformedinaccordancewithregulations,codes,orstandardsfor
electricalwiringandequipmentineachcountry,region,ortheinstallationplace.
Donotusethisequipmentwithairoranyotherunspeciedrefrigerantintherefrigerant
lines.Excesspressurecancausearupture.
Duringinstallation,makesurethattherefrigerantpipeisattachedrmlybeforeyourun
thecompressor.
Donot operatethecompressorundertheconditionofrefrigerantpipingnotattached
properlywith3-wayvalveopen.Thismaycauseabnormalpressureintherefrigeration
cyclethatleadstoruptureandeveninjury.
Wheninstallingorrelocatingtheairconditioner,donotmixgasesotherthanthespecied
refrigerant(R32)toentertherefrigerantcycle.
Ifairorothergasenterstherefrigerantcycle,thepressureinsidethecyclewillrisetoan
abnormallyhighvalueandcauserupture,injury,etc.
WARNING
Indicatesapotentiallyorimminentlyhazardoussituationwhich,if
notavoided,couldresultindeathorseriousinjury.
To connect the indoor unit and outdoor unit, use air conditioner piping and cables
available locally as standard parts. This manual describes proper connections using
such installation set.
Donot modifypowercable,useextensioncableorbranch wiring.Improperusemay
causeelectricshockorrebypoorconnection,insufcientinsulationorovercurrent.
Donotpurgetheairwithrefrigerantsbutuseavacuumpumptovacuumtheinstallation.
Thereisnotextrarefrigerantintheoutdoorunitforairpurging.
UseavacuumpumpforR32orR410Aexclusively.
Usingthesamevacuumpumpfordifferentrefrigerantsmaydamagethevacuumpump
or the unit.
UseacleangaugemanifoldandcharginghoseforR32orR410Aexclusively.
Donotusemeanstoacceleratethe defrostingprocess orto clean,other thanthose
recommendedbythemanufacturer.
Theapplianceshallbestoredinaroomwithoutcontinuouslyoperatingignitionsources
(forexample:openames,anoperatinggasapplianceoranoperatingelectricheater.
Donotpierceorburn.
Beawarethatrefrigerantsmaynotcontainanodour.
Duringthepump-downoperation,makesurethatthecompressoristurnedoffbeforeyou
removetherefrigerantpiping.
Do not removetheconnectionpipe while the compressor is in operationwith3-way
valve open.
Thismaycauseabnormalpressureintherefrigerationcyclethatleadstoruptureand
eveninjury.
This appliance is not intended for use by persons (including children) with reduced
physical,sensoryormental capabilities,orlackof experienceandknowledge,unless
theyhavebeengivensupervision orinstructionconcerninguseoftheappliancebya
personresponsiblefortheirsafety.Childrenshouldbesupervisedtoensurethattheydo
not play with the appliance.
CAUTION
Indicatesapotentiallyhazardoussituationthatmayresultin
minorormoderateinjuryordamagetoproperty.
Fortheairconditionertoworkappropriately,installitaswritteninthismanual.
Theappliance shallnotbe installedinanunventilatedspace, ifthatspace issmaller
than1.61m
2
.
This product must be installed by qualied personnel with a capacity certication of
handlingrefrigerantuids.Refertoregulationandlawsinuseoninstallationplace.
Install the product by following local codes and regulations in force at the place of
installation,andtheinstructionsprovidedbythemanufacturer.
This productis part ofa set constitutingan air conditioner.The product mustnotbe
installedaloneorbeinstalledwithnon-authorizeddevicebythemanufacturer.
Alwaysuseaseparatepowersupplylineprotectedbyacircuitbreakeroperatingonall
wireswithadistancebetweencontactof3mmforthisproduct.
Toprotectthepersons,earth(ground)theproductcorrectly,andusethepowercable
combinedwithanEarthLeakageCircuitBreaker(ELCB).
Thisproductisnotexplosionproof,andthereforeshouldnotbeinstalledinexplosive
atmosphere.
This product contains no user-serviceable parts.Always consult experienced service
techniciansforrepairing.
Wheninstallingpipesshorterthan3m,soundoftheoutdoorunitwillbetransferredtothe
indoorunit,whichwillcauselargeoperatingsoundorsomeabnormalsound.
Whenmovingorrelocatingtheairconditioner,consultexperiencedservicetechnicians
fordisconnectionandreinstallationoftheproduct.
Donottouchthens ofthe heatexchanger.Touching theheat exchangerns could
resultindamagetothensorpersonalinjurysuchasskinrupture.
INSTALLATION MANUAL
AIR CONDITIONER
Outdoor Unit
PART No. 9377863515
Contents
1. SAFETY PRECAUTIONS ................................................................................................1
2.ABOUTTHISPRODUCT.................................................................................................3
2.1.SpecialtoolsforR32 ............................................................................................3
2.2.Accessories ..........................................................................................................4
3.GENERALSPECIFICATION ........................................................................................... 4
3.1.Selectingcircuitbreakerandwiring ...................................................................... 4
3.2.Selectingthepipematerial ...................................................................................4
3.3.Protectionofpipes ................................................................................................ 4
3.4.
Refrigerantpipesizeandallowablepipinglength .......................................................4
3.5. Additional charge .................................................................................................. 5
4.INSTALLATIONWORK ...................................................................................................5
4.1.Selectinganinstallationlocation ..........................................................................5
4.2.Installationdimensions .........................................................................................5
4.3.Installation ............................................................................................................6
5.OUTDOORUNITINSTALLATION ................................................................................... 7
5.1.Switchcoverremoval ...........................................................................................7
5.2.Notesforelectricalwiring .....................................................................................7
5.3.Wiringmethod ......................................................................................................8
5.4.Pipeconnection ....................................................................................................8
5.5. Sealing test ........................................................................................................... 9
5.6.Vacuumprocess ...................................................................................................9
5.7. Installing insulation ...............................................................................................9
6. TEST RUN .......................................................................................................................9
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CAUTION
2-7.Checkstotherefrigerationequipment
• Whereelectricalcomponentsarebeingchanged,theyshallbetforthepurpose
andtothecorrectspecication.
• Atalltimesthemanufacturer’smaintenanceandserviceguidelinesshallbefollowed.
• Ifindoubtconsultthemanufacturer’stechnicaldepartmentforassistance.
• Thefollowingchecksshallbeappliedtoinstallationsusingammablerefrigerants.
-Thechargesizeisinaccordancewiththeroomsizewithinwhichtherefrigerant
containing parts are installed.
-Theventilationmachineryandoutletsareoperatingadequatelyandarenot
obstructed.
-Ifanindirectrefrigeratingcircuitisbeingused,thesecondarycircuitshallbe
checkedforthepresenceofrefrigerant.
-Markingtotheequipmentcontinuestobevisibleandlegible.Markingsandsigns
thatareillegibleshallbecorrected.
-Refrigerationpipeorcomponentsareinstalledinapositionwheretheyare
unlikelytobeexposedtoanysubstancewhichmaycorroderefrigerantcontain-
ingcomponents,unlessthecomponentsareconstructedofmaterialswhichare
inherentlyresistanttobeingcorrodedoraresuitablyprotectedagainstbeingso
corroded.
2-8.Checkstoelectricaldevices
• Repairandmaintenancetoelectricalcomponentsshallincludeinitialsafetychecks
andcomponentinspectionprocedures.
• Ifafaultexiststhatcouldcompromisesafety,thennoelectricalsupplyshallbecon-
nectedtothecircuituntilitissatisfactorilydealtwith.
• Ifthefaultcannotbecorrectedimmediatelybutitisnecessarytocontinueopera-
tion,anadequatetemporarysolutionshallbeused.
• Thisshallbereportedtotheowneroftheequipmentsoallpartiesareadvised.
• Initialsafetychecksshallinclude.
-Thatcapacitorsaredischarged:thisshallbedoneinasafemannertoavoidpos-
sibilityofsparking.
-Thattherenoliveelectricalcomponentsandwiringareexposedwhilecharging,
recoveringorpurgingthesystem.
-Thatthereiscontinuityofearthbonding.
3.Repairstosealedcomponents
• Duringrepairstosealedcomponents,allelectricalsuppliesshallbedisconnected
fromtheequipmentbeingworkeduponpriortoanyremovalofsealedcovers,etc.
• Ifitisabsolutelynecessarytohaveanelectricalsupplytoequipmentduringservic-
ing,thenapermanentlyoperatingformofleakdetectionshallbelocatedatthemost
criticalpointtowarnofapotentiallyhazardoussituation.
• Particularattentionshallbepaidtothefollowingtoensurethatbyworkingonelec-
tricalcomponents,thecasingisnotalteredinsuchawaythatthelevelofprotection
isaffected.
• Thisshallincludedamagetocables,excessivenumberofconnections,terminals
notmadetooriginalspecication,damagetoseals,incorrectttingofglands,etc.
• Ensurethatapparatusismountedsecurely.
• Ensurethatsealsorsealingmaterialshavenotdegradedsuchthattheynolonger
servethepurposeofpreventingtheingressofammableatmospheres.
• Replacementpartsshallbeinaccordancewiththemanufacturer’sspecications.
NOTE:Theuseofsiliconsealantmayinhibittheeffectivenessofsometypesofleak
detectionequipment.
Intrinsicallysafecomponentsdonothavetobeisolatedpriortoworkingonthem.
4.Repairtointrinsicallysafecomponents
• Donotapplyanypermanentinductiveorcapacitanceloadstothecircuitwithout
ensuringthatthiswillnotexceedthepermissiblevoltageandcurrentpermittedfor
theequipmentinuse.
• Intrinsicallysafecomponentsaretheonlytypesthatcanbeworkedonwhilelivein
thepresenceofaammableatmosphere.
• Thetestapparatusshallbeatthecorrectrating.
• Replacecomponentsonlywithpartsspeciedbythemanufacturer.
• Otherpartsmayresultintheignitionofrefrigerantintheatmospherefromaleak.
5.Cabling
• Checkthatcablingwillnotbesubjecttowear,corrosion,excessivepressure,vibra-
tion,sharpedgesoranyotheradverseenvironmentaleffects.
• Thecheckshallalsotakeintoaccounttheeffectsofagingorcontinualvibration
fromsourcessuchascompressorsorfans.
6.Detectionofammablerefrigerants
• Undernocircumstancesshallpotentialsourcesofignitionbeusedinthesearching
forordetectionofrefrigerantleaks.
• Ahalidetorch(oranyotherdetectorusinganakedame)shallnotbeused.
Precautions for using R32 refrigerant
Thebasicinstallationworkproceduresarethesameasconventionalrefrigerant(R410A,
R22)models.
However,paycarefulattentiontothefollowingpoints:
WARNING
Sincetheworkingpressureis1.6timeshigherthanthatofrefrigerantR22models,
someofthepipingandinstallationandservicetoolsarespecial.(See“2.1.Special
toolsforR32”.)
Especially,whenreplacingarefrigerantR22modelwithanewrefrigerantR32model,
alwaysreplacetheconventionalpipingandarenutswiththeR32andR410Apiping
andarenutsontheoutdoorunitside.
ForR32andR410A,thesamearenutontheoutdoorunitsideandpipecanbeused.
ModelsthatuserefrigerantR32andR410Ahaveadifferentchargingportthreaddiam-
etertopreventerroneouschargingwithrefrigerantR22andforsafety.Therefore,check
beforehand.[ThechargingportthreaddiameterforR32andR410Ais1/2-20UNF.]
BemorecarefulthanR22sothatforeignmatter(oil,water,etc.)doesnotenterthepiping.
Also,whenstoringthepiping,securelysealtheopeningbypinching,taping,etc.(Han-
dlingofR32issimilartoR410A.)
CAUTION
1.Installation(Space)
• Thattheinstallationofpipe-workshallbekepttoaminimum.
• Thatpipe-workshallbeprotectedfromphysicaldamage.
• Thatcompliancewithnationalgasregulationsshallbeobserved.
• Thatmechanicalconnectionsshallbeaccessibleformaintenancepurposes.
• Incasesthatrequiremechanicalventilation,ventilationopeningsshallbekeptclear
ofobstruction.
• Whendisposingoftheproductisused,bebasedonnationalregulations,properly
processed.
2.Servicing
2-1.Servicepersonnel
• Anypersonwhoisinvolvedwithworkingonorbreakingintoarefrigerantcircuit
shouldholdacurrentvalidcerticatefromanindustry-accreditedassessment
authority,whichauthorizestheircompetencetohandlerefrigerantssafelyinaccord-
ancewithanindustryrecognisedassessmentspecication.
• Servicingshallonlybeperformedasrecommendedbytheequipmentmanufacturer.
Maintenanceandrepairrequiringtheassistanceofotherskilledpersonnelshallbe
carriedoutunderthesupervisionofthepersoncompetentintheuseofammable
refrigerants.
• Servicingshallbeperformedonlyasrecommendedbythemanufacturer.
2-2.Work
• Priortobeginningworkonsystemscontainingammablerefrigerants,safety
checksarenecessarytoensurethattheriskofignitionisminimised.Forrepairto
therefrigeratingsystem,theprecautionsin2-2to2-8shallbecompliedwithpriorto
conductingworkonthesystem.
• Workshallbeundertakenunderacontrolledproceduresoastominimizetheriskof
aammablegasorvapourbeingpresentwhiletheworkisbeingperformed.
• Allmaintenancestaffandothersworkinginthelocalareashallbeinstructedonthe
natureofworkbeingcarriedout.
• Workinconnedspacesshallbeavoided.
• Theareaaroundtheworkspaceshallbesectionedoff.
• Ensurethattheconditionswithintheareahavebeenmadesafebycontrolofam-
mablematerial.
2-3.Checkingforpresenceofrefrigerant
• Theareashallbecheckedwithanappropriaterefrigerantdetectorpriortoanddur-
ingwork,toensurethetechnicianisawareofpotentiallyammableatmospheres.
• Ensurethattheleakdetectionequipmentbeingusedissuitableforusewitham-
mablerefrigerants,i.e.nonsparking,adequatelysealedorintrinsicallysafe.
2-4.Presenceofreextinguisher
• Ifanyhotworkistobeconductedontherefrigerationequipmentoranyassociated
parts,appropriatereextinguishingequipmentshallbeavailableathand.
• HaveadrypowderorCO
2
reextinguisheradjacenttothechargingarea.
2-5.Noignitionsources
• Nopersoncarryingoutworkinrelationtoarefrigerationsystemwhichinvolves
exposinganypipeworkthatcontainsorhascontainedammablerefrigerantshall
useanysourcesofignitioninsuchamannerthatitmayleadtotheriskofreor
explosion.
• Allpossibleignitionsources,includingcigarettesmoking,shouldbekeptsufciently
farawayfromthesiteofinstallation,repairing,removinganddisposal,duringwhich
ammablerefrigerantcanpossiblybereleasedtothesurroundingspace.
• Priortoworktakingplace,theareaaroundtheequipmentistobesurveyedtomake
surethattherearenoammablehazardsorignitionrisks.“NoSmoking”signsshall
bedisplayed.
2-6.Ventilatedarea
• Ensurethattheareaisintheopenorthatitisadequatelyventilatedbeforebreaking
intothesystemorconductinganyhotwork.
• Adegreeofventilationshallcontinueduringtheperiodthattheworkiscarriedout.
• Theventilationshouldsafelydisperseanyreleasedrefrigerantandpreferablyexpel
itexternallyintotheatmosphere.
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En-3
CAUTION
7.Leakdetectionmethods
• Electronicleakdetectorsshallbeusedtodetectammablerefrigerants,butthe
sensitivitymaynotbeadequate,ormayneedre-calibration.(Detectionequipment
shallbecalibratedinarefrigerant-freearea.)
• Ensurethatthedetectorisnotapotentialsourceofignitionandissuitableforthe
refrigerantused.
• LeakdetectionequipmentshallbesetatapercentageoftheLFLoftherefrigerant
andshallbecalibratedtotherefrigerantemployedandtheappropriatepercentage
ofgas(25%maximum)isconrmed.
• Leakdetectionuidsaresuitableforusewithmostrefrigerantsbuttheuseof
detergentscontainingchlorineshallbeavoidedasthechlorinemayreactwiththe
refrigerantandcorrodethecopperpipe-work.
• Ifaleakissuspected,allnakedamesshallberemoved/extinguished.
• Ifaleakageofrefrigerantisfoundwhichrequiresbrazing,alloftherefrigerantshall
berecoveredfromthesystem,orisolated(bymeansofshutoffvalves)inapartof
thesystemremotefromtheleak.
Oxygenfreenitrogen(OFN)shallthenbepurgedthroughthesystembothbefore
andduringthebrazingprocess.
8.Removalandevacuation
• Whenbreakingintotherefrigerantcircuittomakerepairs–orforanyother
purpose–conventionalproceduresshallbeused.
However,itisimportantthatbestpracticeisfollowedsinceammabilityisaconsid-
eration.
Thefollowingprocedureshallbeadheredto:
• removerefrigerant
• purge the circuit with inert gas
• evacuate
• purge again with inert gas
• openthecircuitbycuttingorbrazing
• Therefrigerantchargeshallberecoveredintothecorrectrecoverycylinders.
• Thesystemshallbe“ushed”withOFNtorendertheunitsafe.
• Thisprocessmayneedtoberepeatedseveraltimes.
• Compressedairoroxygenshallnotbeusedforthistask.
• FlushingshallbeachievedbybreakingthevacuuminthesystemwithOFNand
continuingtolluntiltheworkingpressureisachieved,thenventingtoatmosphere,
andnallypullingdowntoavacuum.
• Thisprocessshallberepeateduntilnorefrigerantiswithinthesystem.
• WhenthenalOFNchargeisused,thesystemshallbeventeddowntoatmos-
phericpressuretoenableworktotakeplace.
• Thisoperationisabsolutelyvitalifbrazingoperationsonthepipeworkaretotakeplace.
• Ensurethattheoutletforthevacuumpumpisnotclosetoanyignitionsourcesand
thereisventilationavailable.
9.Charging procedures
• Inadditiontoconventionalchargingprocedures,thefollowingrequirementsshallbe
followed.
-Ensurethatcontaminationofdifferentrefrigerantsdoesnotoccurwhenusing
chargingequipment.
-Hosesorlinesshallbeasshortaspossibletominimizetheamountofrefrigerant
containedinthem.
-Cylindersshallbekeptupright.
-Ensurethattherefrigerationsystemisearthedpriortochargingthesystemwith
refrigerant.
-Labelthesystemwhenchargingiscomplete(ifnotalready).
-Extremecareshallbetakennottooverlltherefrigerationsystem.
• PriortorechargingthesystemitshallbepressuretestedwithOFN.
• Thesystemshallbeleaktestedoncompletionofchargingbutpriortocommissioning.
• Afollowupleaktestshallbecarriedoutpriortoleavingthesite.
10.Decommissioning
• Beforecarryingoutthisprocedure,itisessentialthatthetechnicianiscompletely
familiarwiththeequipmentandallitsdetails.
• Itisrecommendedgoodpracticethatallrefrigerantsarerecoveredsafely.
• Priortothetaskbeingcarriedout,anoilandrefrigerantsampleshallbetakenin
caseanalysisisrequiredpriortore-useofreclaimedrefrigerant.
• Itisessentialthatelectricalpowerisavailablebeforethetaskiscommenced.
a)Becomefamiliarwiththeequipmentanditsoperation.
b)Isolatesystemelectrically.
c)Beforeattemptingtheprocedureensurethat:
• mechanicalhandlingequipmentisavailable,ifrequired,forhandlingrefriger-
ant cylinders;
• allpersonalprotectiveequipmentisavailableandbeingusedcorrectly;
• therecoveryprocessissupervisedatalltimesbyacompetentperson;
• recoveryequipmentandcylindersconformtotheappropriatestandards.
d)Pumpdownrefrigerantsystem,ifpossible.
e)Ifavacuumisnotpossible,makeamanifoldsothatrefrigerantcanberemoved
fromvariouspartsofthesystem.
f)Makesurethatcylinderissituatedonthescalesbeforerecoverytakesplace.
g)Starttherecoverymachineandoperateinaccordancewithmanufacturer’s
instructions.
h)Donotoverllcylinders.(Nomorethan80%volumeliquidcharge).
i)Donotexceedthemaximumworkingpressureofthecylinder,eventemporarily.
j)Whenthecylindershavebeenlledcorrectlyandtheprocesscompleted,make
surethatthecylindersandtheequipmentareremovedfromsitepromptlyand
allisolationvalvesontheequipmentareclosedoff.
k)Recoveredrefrigerantshallnotbechargedintoanotherrefrigerationsystem
unlessithasbeencleanedandchecked.
CAUTION
11.Labelling
• Equipmentshallbelabelledstatingthatithasbeende-commissionedandemptied
ofrefrigerant.
• Thelabelshallbedatedandsigned.
• Ensurethattherearelabelsontheequipmentstatingtheequipmentcontainsam-
mablerefrigerant.
12.Recovery
• Whenremovingrefrigerantfromasystem,eitherforservicingordecommissioning,
itisrecommendedgoodpracticethatallrefrigerantsareremovedsafely.
• Whentransferringrefrigerantintocylinders,ensurethatonlyappropriaterefrigerant
recoverycylindersareemployed.
• Ensurethatthecorrectnumberofcylindersforholdingthetotalsystemchargeare
available.
• Allcylinderstobeusedaredesignatedfortherecoveredrefrigerantandlabelledfor
thatrefrigerant(i.e.specialcylindersfortherecoveryofrefrigerant).
• Cylindersshallbecompletewithpressurereliefvalveandassociatedshut-offvalves
ingoodworkingorder.
• Emptyrecoverycylindersareevacuatedand,ifpossible,cooledbeforerecovery
occurs.
• Therecoveryequipmentshallbeingoodworkingorderwithasetofinstructions
concerningtheequipmentthatisathandandshallbesuitablefortherecoveryof
ammablerefrigerants.
• Inaddition,asetofcalibratedweighingscalesshallbeavailableandingoodwork-
ing order.
• Hosesshallbecompletewithleak-freedisconnectcouplingsandingoodcondition.
• Beforeusingtherecoverymachine,checkthatitisinsatisfactoryworkingorder,has
beenproperlymaintainedandthatanyassociatedelectricalcomponentsaresealed
topreventignitionintheeventofarefrigerantrelease.
Consultmanufacturerifindoubt.
• Therecoveredrefrigerantshallbereturnedtotherefrigerantsupplierinthecorrect
recoverycylinder,andtherelevantWasteTransferNotearranged.
• Donotmixrefrigerantsinrecoveryunitsandespeciallynotincylinders.
• Ifcompressorsorcompressoroilsaretoberemoved,ensurethattheyhavebeen
evacuatedtoanacceptableleveltomakecertainthatammablerefrigerantdoes
notremainwithinthelubricant.
• Theevacuationprocessshallbecarriedoutpriortoreturningthecompressortothe
suppliers.
• Onlyelectricheatingtothecompressorbodyshallbeemployedtoacceleratethis
process.
• Whenoilisdrainedfromasystem,itshallbecarriedoutsafely.
Explanationofsymbolsdisplayedontheindoorunitoroutdoorunit.
WARNING
Thissymbolshowsthatthisequipmentusesaammable
refrigerant.Iftherefrigerantisleaked,togetherwithan
externalignitionsource,thereisapossibilityofignition.
CAUTION
ThissymbolshowsthattheOperationManualshouldbe
readcarefully.
CAUTION
Thissymbolshowsthataservicepersonnelshouldbe
handlingthisequipmentwithreferencetotheInstallation
Manual.
CAUTION
Thissymbolshowsthatthereisinformationincludedinthe
OperationManualand/orInstallationManual.
2. ABOUT THIS PRODUCT
2.1. Special tools for R32
WARNING
ToinstallaunitthatusesR32refrigerant,usededicatedtoolsandpipingmaterialsthat
havebeenmanufacturedspecicallyforR32(R410A)use.Becausethepressureof
R32refrigerantisapproximately1.6timeshigherthanR22,failuretousededicated
pipingmaterialorimproperinstallationcancauseruptureorinjury.Furthermore,itcan
causeseriousaccidentssuchaswaterleakage,electricshock,orre.
Donotuseavacuumpumporrefrigerantrecoverytoolswithaseriesmotor,sinceit
mayignite.
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Tool name
Contents of change
Gaugemanifold
Pressureishighandcannotbemeasuredwithaconventional
(R22)gauge.Topreventerroneousmixingofotherrefriger-
ants,thediameterofeachporthasbeenchanged.
Itisrecommendedthegaugewithseals-0.1to5.3MPa(-1
to53bar)forhighpressure.-0.1to3.8MPa(-1to38bar)for
low pressure.
Charge hose
Toincreasepressureresistance,thehosematerialandbase
sizewerechanged.(R32/R410A)
Vacuumpump
Aconventionalvacuumpumpcanbeusedbyinstallinga
vacuumpumpadapter.
(Useofavacuumpumpwithaseriesmotorisprohibited.)
Gasleakagedetector
SpecialgasleakagedetectorforHFCrefrigerantR32/R410A.
Copper pipes
Itisnecessarytouseseamlesscopperpipesanditisdesirablethattheamountof
residualoilislessthan40mg/10m.Donotusecopperpipeshavingacollapsed,
deformedordiscoloredportion(especiallyontheinteriorsurface).Otherwise,the
expansionvalveorcapillarytubemaybecomeblockedwithcontaminants.
AsanairconditionerusingR32(R410A)incurspressurehigherthanwhenusing
conventionalrefrigerant,itisnecessarytochooseadequatematerials.
2.2. Accessories
WARNING
Forinstallationpurposes,besuretousethepartssuppliedbythemanufactureror
otherprescribedparts.Theuseofnon-prescribedpartscancauseseriousaccidents
suchastheunitfalling,waterleakage,electricshock,orre.
• Thefollowinginstallationpartsaresupplied.Usethemasrequired.
• KeeptheInstallationManualinasafeplaceanddonotdiscardanyotheraccessories
untiltheinstallationworkhasbeencompleted.
Name and shape
Q’ty Description
Installation Manual
1
Thismanual
3. GENERAL SPECIFICATION
3.1. Selecting circuit breaker and wiring
CAUTION
Besuretoinstallabreakerofthespeciedcapacity.
Regulationofcablesandbreakerdiffersfromeachlocality,referinaccordancewith
local rules.
Voltage rating 1Φ220V(50Hz)
Operating range 155to265V
Cable Conductorsize[mm²]
*1
Type Remarks
PowerSupplyCable 1.5 Type60245IEC57 2wire+Ground
ConnectionCable 1.5 Type60245IEC57 3wire+Ground
*1Selectedsample:Selectthecorrectcabletypeandsizeaccordingtothecountryor
region’sregulations.
*Cablelength:Limitthevoltagedroptolessthan2%.Increasethecablediameterifvolt-
agedropis2%ormore.
Breaker capacity
[A]
Earth leakage breaker
[mA]
15 30
• Selectthebreakerthatenoughloadcurrentcanpassthroughit.
• Beforestartingworkcheckthatpowerisnotbeingsuppliedtoallpolesoftheindoor
unit and the outdoor unit.
• Installallelectricalworksinaccordancetostandard.
• Installthedisconnectdevicewithacontactgapofatleast3mminallpolesnearby
theunits.(Bothindoorunitandoutdoorunit)
3.2. Selecting the pipe material
CAUTION
Donotuseexistingpipes.
Usepipesthathavecleanexternalandinternalsideswithoutanycontaminationwhich
maycausetroubleduringuse,suchassulfur,oxide,dust,cuttingwaste,oil,orwater.
Itisnecessarytouseseamlesscopperpipes.
Material:Phosphordeoxidizedseamlesscopperpipes.
Itisdesirablethattheamountofresidualoilislessthan40mg/10m.
Donotusecopperpipesthathaveacollapsed,deformed,ordiscoloredportion
(especiallyontheinteriorsurface).Otherwise,theexpansionvalveorcapillarytube
maybecomeblockedwithcontaminants.
Improperpipeselectionwilldegradeperformance.Asanairconditionerusing
R32(R410A)incurspressurehigherthanwhenusingconventionalrefrigerant,itis
necessarytochooseadequatematerials.
• ThicknessesofcopperpipesusedwithR32(R410A)areasshowninthetable.
• Neverusecopperpipesthinnerthanthoseindicatedinthetableeveniftheyare
availableonthemarket.
Thicknesses of Annealed Copper Pipes
Pipe outside diameter [mm (in.)] Thickness [mm]
6.35(1/4) 0.80
9.52(3/8) 0.80
12.70(1/2) 0.80
15.88(5/8) 1.00
19.05(3/4) 1.20
3.3. Protection of pipes
• Protectthepipestopreventtheentryofmoistureanddust.
• Especially,payattentionwhenpassingthepipesthroughaholeorconnectingthe
endofapipetotheoutdoorunit.
Location Working period Protection method
Outdoor
1monthormore Pinch pipes
Lessthan1month Pinch or tape pipes
Indoor - Pinch or tape pipes
3.4.
Refrigerant pipe size and allowable piping length
CAUTION
Keepthepipinglengthbetweentheindoorunitandoutdoorunitwithintheallowable
tolerance.
Themaximumlengthsofthisproductareshowninthetable.Iftheunitsarefurther
apartthanthis,correctoperationcannotbeguaranteed.
Model 09/12 18 24
Pipediameter<Liquid/Gas>
[mm(in.)]
6.35(1/4)/9.52(3/8) 6.35(1/4)/12.70(1/2)
Maxpipinglength(L)
[m] 20 20 25
Max.heightdifference(H)
<Indoorunittooutdoorunit>
[m]
15 15 20
View(Example)
H
L
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3.5. Additional charge
CAUTION
Whenaddingrefrigerant,addtherefrigerantfromthechargingportatthecompletion
ofwork.
Refrigerantsuitableforapipinglengthof10m(*1)or15m(*2)ischargedintheoutdoor
unitatthefactory.
Whenthepipingislongerthan10m(*1)or15m(*2),additionalchargingisnecessary.
Fortheadditionalamount,seethefollowingtable.
*109/12/18model
Pipe length 10m 15m 20m Rate
Additionalrefrigerant None
+100g +200g 20g/m
*224model
Pipe length 15m 20m 25m Rate
Additionalrefrigerant None
+100g +200g 20g/m
Between10m(*1)or15m(*2)andthemaximumlength,whenusingaconnectionpipeother
thanthatinthetable,chargeadditionalrefrigerantwith20g/1masthecriteria.
4. INSTALLATION WORK
Makesuretoobtainthecustomer’sapprovalforselectingandinstallingtheoutdoorunit.
4.1. Selecting an installation location
WARNING
Securelyinstalltheoutdoorunitatalocationthatcanwithstandtheweightoftheunit.
Otherwise,theoutdoorunitmayfallandcauseinjury.
Besuretoinstalltheoutdoorunitasprescribed,sothatitcanwithstandearthquakes
andtyphoonsorotherstrongwinds.Improperinstallationcancausetheunittotopple
orfall,orotheraccidents.
Donotinstalltheoutdoorunitneartheedgeofabalcony.Otherwise,childrenmay
climbontotheoutdoorunitandfalloffofthebalcony.
CAUTION
Donotinstalltheoutdoorunitinthefollowingareas:
• Areawithhighsaltcontent,suchasattheseaside.Itwilldeterioratemetalparts,
causingthepartstofailortheunittoleakwater.
• Arealledwithmineraloilorcontainingalargeamountofsplashedoilorsteam,
suchasakitchen.Itwilldeteriorateplasticparts,causingthepartstofailortheunit
toleakwater.
• Areathatgeneratessubstancesthatadverselyaffecttheequipment,suchas
sulfuricgas,chlorinegas,acid,oralkali.Itwillcausethecopperpipesandbrazed
jointstocorrode,whichcancauserefrigerantleakage.
• Areacontainingequipmentthatgenerateselectromagneticinterference.Itwill
causethecontrolsystemtomalfunction,preventingtheunitfromoperating
normally.
• Areathatcancausecombustiblegastoleak,containssuspendedcarbonbersor
ammabledust,orvolatileinammablessuchaspaintthinnerorgasoline.Ifgas
leaksandsettlesaroundtheunit,itcancauseare.
• Areathathasheatsources,vapors,ortheriskoftheleakageofammablegasin
the vicinity.
• Areawheresmallanimalsmaylive.Itmaycausefailure,smokeorreifsmall
animalsenterandtouchinternalelectricalparts.
• Areawhereanimalsmayurinateontheunitorammoniamaybegenerated.
Donottilttheoutdoorunitmorethan3degrees.However,donotinstalltheunitwithit
tiltedtowardsthesidecontainingthecompressor.
Installtheoutdoorunitinawell-ventilatedlocationawayfromrainordirectsunlight.
Iftheoutdoorunitmustbeinstalledinanareawithineasyreachofthegeneralpublic,
installasnecessaryaprotectivefenceortheliketopreventtheiraccess.
Installtheoutdoorunitinalocationthatwouldnotinconvenienceyourneighbors,as
theycouldbeaffectedbytheairowcomingoutfromtheoutlet,noise,orvibration.Ifit
mustbeinstalledinproximitytoyourneighbors,besuretoobtaintheirapproval.
Iftheoutdoorunitisinstalledinacoldregionthatisaffectedbysnowaccumulation,
snowfall,orfreezing,takeappropriatemeasurestoprotectitfromthoseelements.To
ensureastableoperation,installinletandoutletducts.
Installtheoutdoorunitinalocationthatisawayfromexhaustortheventportsthat
dischargevapor,soot,dust,ordebris.
Installtheindoorunit,outdoorunit,powersupplycable,connectioncable,andremote
controllercableatleast1mawayfromatelevisionorradioreceivers.Thepurposeof
thisistopreventTVreceptioninterferenceorradionoise.(Eveniftheyareinstalled
morethan1mapart,youcouldstillreceivenoiseundersomesignalconditions.)
Ifchildrenunder10yearsoldmayapproachtheunit,takepreventivemeasuressothat
they cannot reach the unit.
Keepthelengthofthepipingoftheindoorandoutdoorunitswithintheallowablerange.
Formaintenancepurposes,donotburythepiping.
Decidethemountingpositionwiththecustomerasfollows:
(1)Installtheoutdoorunitinalocationwhichcanwithstandtheweightoftheunitand
vibration,andwhichcaninstallhorizontally.
(2)Providetheindicatedspacetoensuregoodairow.
(3)Ifpossible,donotinstalltheunitwhereitwillbeexposedtodirectsunlight.
(Ifnecessary,installablindthatdoesnotinterferewiththeairow.)
(4)Donotinstalltheunitnearasourceofheat,steam,orammablegas.
(5)Donotinstalltheunitwherestrongwindblowsorwhereitisverydusty.
(6)Donotinstalltheunitwherepeoplepass.
(7)Installtheoutdoorunitinaplacewhereitwillbefreefrombeingdirtyorgettingwetby
rainasmuchaspossible.
(8)Installtheunitwhereconnectiontotheindoorunitiseasy.
4.2. Installation dimensions
CAUTION
Keepthespaceshownintheinstallationexamples.
Iftheinstallationisnotperformedaccordingly,itcouldcauseashortcircuitandresultin
alackofoperatingperformance.
4.2.1. Outdoor unit installation
When the upper space is open (Unit:mm)
(1)Obstaclesatrearonly
100ormore
(2)Obstaclesatrearandsides
250ormore
100ormore
100ormore
(3)Obstaclesatfront
600ormore
(4)Obstaclesatfrontandrear
600ormore
100ormore
When an obstruction in the upper space (Unit:mm)
(1)Obstaclesatrearandabove
100ormore
Max.200
600ormore
(2)Obstaclesatrear,sides,andabove
600or
more
250ormore
100ormore
Max.200
100ormore
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4.2.2. Multiple outdoor unit installation
• Provideatleast250mmofspacebetweentheoutdoorunitsifmultipleunitsare
installed.
• Whenroutingthepipingfromthesideofanoutdoorunit,providespaceforthepiping.
• Nomorethan3unitsmustbeinstalledsidebyside.
When3unitsormorearearrangedinaline,providethespaceasshowninthe
followingexamplewhenanobstructionintheupperspace.
When the upper space is open (Unit:mm)
(1)Obstaclesatrearonly
200ormore
250ormore
(2)Obstaclesatfrontonly
1,000ormore
250ormore
(3)Obstaclesatfrontandrear
200ormore
1,000ormore
250ormore
When an obstruction in the upper space (Unit:mm)
(1)Obstaclesatrearandabove
• Upto3unitscanbeinstalledsidebyside.
• When4unitsormorearearrangedinaline,providethespaceasshownbelow.
1,500ormore
200ormore
250ormore
250ormore
Max.300
1,500ormore
4.2.3. Outdoor units installation multi-row (Unit:mm)
(1)Singleparallelunitarrangement
100ormore
200ormore
500ormore
1,000ormore
(2)Multipleparallelunitarrangement
200ormore
400ormore
1,000ormore
250ormore
2,000ormore
250ormore
1,000ormore
200ormore
250ormore
200ormore
NOTES:
• Ifthespaceislargerthanstatedabove,theconditionwillbethesameaswhenthere
isnoobstacle.
• Wheninstallingtheoutdoorunit,besuretoopenthefrontandleftsidetoobtain
betteroperationefciency.
4.3. Installation
• Install4anchorboltsatthelocationsindicatedwitharrowsinthegure.
• Toreducevibration,donotinstalltheunitdirectlyontheground.Installitonasecure
base(suchasconcreteblocks).
• Thefoundationshallsupportthelegsoftheunitandhaveawidthof50mmormore.
• Dependingontheinstallationconditions,theoutdoorunitmayspreaditsvibration
duringoperation,whichmaycausenoiseandvibration.Therefore,attachdamping
materials(suchasdampingpads)totheoutdoorunitduringinstallation.
• Installthefoundation,makingsurethatthereisenoughspaceforinstallingthe
connection pipes.
• Securetheunittoasolidblockusingfoundationbolts.(Use4setsofcommercially
availableM10bolts,nuts,andwashers.)
• Theboltsshouldprotrude20mm.(Refertothegure.)
• Ifoverturningpreventionisrequired,purchasethenecessarycommerciallyavailable
items.
(Unit:mm)
A
330
Bolt
20
Nut
Washer
Model A
09/12/18 450
24 580
CAUTION
50mmormore
Iftheunitisinstalledinaregionthatisexposedto
highwinds,freezingconditions,freezingrain,snow
fallorheavysnowaccumulation,takeappropriate
measurestoprotectitfromthoseelements.
Toensurestableoperation,theoutdoorunitmustbe
installedonaraisedstandorrack,atorabovethe
anticipatedsnowdepthfortheregion.
Theinstallationofsnowhoodsanddriftprevention
fencingisrecommendedwhenblowinganddrifting
snowiscommontotheregion.
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5. OUTDOOR UNIT INSTALLATION
5.1. Switch cover removal
Switch cover removal
(1) Removethetappingscrews.
(2) Slidetheswitchcoverdownwardsto
release.
Installing the switch cover
(1) Afterinsertingthehooks(2places)on
the switch cover into the hole on the
outdoorunit,slidetheswitchcover
upwards.
(2) Replacethetappingscrews.
*Dependingonthemodel,maynotbe
attached.
Screws
Screw*
Switch cover
Hooks
Hooks
5.2. Notes for electrical wiring
WARNING
Wiringconnectionsmustbeperformedbyaqualiedpersoninaccordancewith
thespecications.Thevoltageratingforthisproductis220Vat50Hz.Itshouldbe
operatedwithintherangeof155to265V.
Beforeconnectingthewires,makesurethepowersupplyisoff.
Nevertouchelectricalcomponentsimmediatelyafterthepowersupplyhasbeen
turnedoff.Electricalshockmayoccur.Afterturningoffthepower,alwayswait
10minutesormorebeforetouchingelectricalcomponents.
Useadedicatedpowersupplycircuit.Insufcientpowercapacityintheelectricalcircuit
orimproperwiringmaycauseelectricshockorre.
Besuretoinstallanearthleakagebreaker.
Otherwise,itwillcauseelectricshockorre.
Acircuitbreakerisinstalledinthepermanentwiring.Alwaysuseacircuitthatcantrip
allthepolesofthewiringandhasanisolationdistanceofatleast3mmbetweenthe
contactsofeachpole.
Usedesignatedcablesandpowercables.Improperusemaycauseelectricshockor
rebypoorconnection,insufcientinsulation,orovercurrent.
Donotmodifypowercable,useextensioncableorbranchwiring.Improperusemay
causeelectricshockorrebypoorconnection,insufcientinsulationorovercurrent.
Connecttheconnectorcablesecurelytotheterminal.Checknomechanicalforcebears
onthecablesconnectedtotheterminals.Faultyinstallationcancauseare.
Useringterminalsandtightentheterminalscrewstothespeciedtorques,otherwise,
abnormaloverheatingmaybeproducedandpossiblycauseseriousdamageinside
the unit.
Makesuretosecuretheinsulationportionoftheconnectorcablewiththecable
clamp.Damagedinsulationcancauseashortcircuit.
Fixcablessothatcablesdonotmakecontactwiththepipes(especiallyonhigh
pressureside).Donotmakepowersupplycableandtransmissioncablecomein
contactwithvalves(Gas).
Neverinstallapowerfactorimprovementcondenser.Insteadofimprovingthepower
factor,thecondensermayoverheat.
Besuretoperformthegroundingwork.
Donotconnectgroundingwirestoagaspipe,waterpipe,lightningrodorgrounding
wireforatelephone.
• Connectiontoagaspipemaycauseareorexplosionifgasleaks.
• ConnectiontoawaterpipeisnotaneffectivegroundingmethodifPVCpipeisused.
• Connectiontothegroundingwireofatelephoneortoalightningrodmaycausea
dangerouslyabnormalriseintheelectricalpotentialiflightningstrikes.
• Impropergroundingworkcancauseelectricshocks.
Securelyinstalltheelectricalboxcoverontheunit.Animproperlyinstalledservice
panelcancauseseriousaccidentssuchaselectricshockorrethroughexposureto
dust or water.
DonotconnecttheACpowersupplytothetransmissionlineterminalboard.Improper
wiringcandamagetheentiresystem.
CAUTION
Theprimarypowersupplycapacityisfortheairconditioneritself,anddoesnot
includetheconcurrentuseofotherdevices.
Iftheelectricalpowerisinadequate,contactyourelectricpowercompany.
Installabreakerinalocationthatisnotexposedtohightemperatures.
Ifthetemperaturesurroundingthebreakeristoohigh,theamperageatwhichthe
breakercutsoutmaydecrease.
Whenusinganearthleakagebreakerthathasbeendesignedsolelyforgroundfault
protection,besuretoinstallafuse-equippedswitchorcircuitbreaker.
CAUTION
Thissystemusesaninverter,whichmeansthatitmustbeusedanearthleakage
breakerthatcanhandleharmonicsinordertopreventmalfunctioningoftheearth
leakagebreakeritself.
Donotusecrossoverpowersupplywiringfortheoutdoorunit.
Ifthetemperaturesurroundingthebreakeristoohigh,theamperageatwhichthe
breakercutsoutmaydecrease.
Whentheelectricalswitchboardisinstalledoutdoors,placeitunderlockandkeyso
thatitisnoteasilyaccessible.
Startwiringworkafterclosingbranchswitchandovercurrentbreaker.
Connectioncablebetweenindoorunitandoutdoorunitis220V.
Besurenottoremovethermistorsensoretc.frompowerwiringandconnection
wiring.Compressormayfailifoperatedwhileremoved.
Alwayskeeptothemaximumlengthoftheconnectioncable.Exceedingthemaximum
lengthmayleadtoerroneousoperation.
Donotstartoperationuntiltherefrigerantischargedcompletely.Thecompressorwill
failifitisoperatedbeforetherefrigerantpipingchargingiscomplete.
ThestaticelectricitythatischargedtothehumanbodycandamagethecontrolPC
BoardwhenhandlingthecontrolPCBoardforaddresssetting,etc.
Pleasekeepcautiontothefollowingpoints.
ProvidethegroundingofIndoorunit,OutdoorunitandOptionequipment.
Cutoffthepowersupply(breaker).
Touchthemetalsection(suchastheunpaintedcontrolboxsection)oftheindooror
outdoorunitformorethan10seconds.Dischargethestaticelectricityinyourbody.
NevertouchthecomponentterminalorpatternonthePCBoard.
Becarefulnottogenerateasparkasfollowsforusingaammablerefrigerant.
• Donotremovethefusewhilepowerison.
• Donotdisconnectplugfromthewalloutletandthewiringwhilethepowerison.
• Itisrecommendedtopositiontheoutletconnectioninahighposition.Placethe
cords so that they do not get tangled.
Conrmtheindoorunitmodelnamebeforeconnecting.IftheindoorunitisnotR32
compatible,errorsignalwillbedisplayed,andtheunitwillbeinoperable.
How to connect wiring to the terminal
Cautionwhenwiringcable
• Whenstrippingoffthecoatingofaleadwire,alwaysuseaspecialtoolsuchasawire
stripper.Ifthereisnospecialtoolavailable,carefullystripthecoatingwithaknifeetc.
(1) Useringterminalswithinsulatingsleevesasshowninthefollowinggureto
connecttotheterminalblock.
(2) Securelyclamptheringterminalstothewiresusinganappropriatetoolsothatthe
wiresdonotcomeloose.
Sleeve
Strip:10mm
Ring terminal
(3) Usethespeciedwires,connectthemsecurely,andfastenthemsothatthereisno
stressplacedontheterminals.
(4) Useanappropriatescrewdrivertotightentheterminalscrews.Donotusea
screwdriverthatistoosmall,otherwise,thescrewheadsmaybedamagedand
preventthescrewsfrombeingproperlytightened.
(5) Donottightentheterminalscrewstoomuch,otherwise,thescrewsmaybreak.
Wire
Screw with special washer
Ringterminal
Terminalblocks
Screw with
special washer
Wire
Ring terminal
(6) Seethefollowingtablefortheterminalscrewtighteningtorques.
Tightening torque [N·m (kgf·cm)]
M4screw 1.2to1.8(12to18)
M5 screw 2.0to3.0(20to30)
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5.4. Pipe connection
CAUTION
Donotusemineraloilonaaredpart.Preventmineraloilfromgettingintothesystem
asthiswouldreducethelifetimeoftheunits.
Whileweldingthepipes,besuretoblowdrynitrogengasthroughthem.
Flaring
(1) Cuttheconnectionpipetothenecessarylengthwithapipecutter.
(2) Holdthepipedownwardsothatcuttingswillnotenterthepipeandremovethe
burrs.
(3) Insertthearenutontothepipeandarethepipewithaaringtool
.
Insertthearenut(alwaysusethearenutattachedtotheindoorandoutdoor
unitsrespectively)ontothepipeandperformtheareprocessingwithaaretool.
UsethespecialR32(R410A)aretool,ortheconventional(forR22)aretool.
Whenusingtheconventionalaretool,alwaysuseanallowanceadjustmentgaugeand
securetheAdimensionshowninthefollowingtable.
Checkif[L]isareduniformlyand
isnotcrackedorscratched.
Die
A
Pipe
Pipe outside
diameter
[mm(in)]
A(mm)
Flaringtoolfor
R32orR410A,clutchtype
Conventional(R22)Flaringtool
Clutch type Wing nut type
6.35(1/4)
0to0.5 1.0to1.5 1.5to2.0
9.52(3/8)
12.70(1/2)
15.88(5/8)
19.05(3/4)
Bending pipes
(1) Whenbendingthepipe,becarefulnottocrushit.
(2) Topreventbreakingofthepipe,avoidsharpbends.
Bendthepipewitharadiusofcurvatureof70mmormore.
(3) Ifthecopperpipeisbendthepipeorpulledtoooften,itwillbecomestiff.Donot
bendthepipesmorethanthreetimesatoneplace.
Flare connection
(1) Detachthecapsandplugsfromthepipes.
CAUTION
Be sure to apply the pipe against the port on the indoor unit and the outdoor unit
correctly.Ifthecenteringisimproper,thearenutcannotbetightenedsmoothly.Ifthe
arenutisforcedtoturn,thethreadswillbedamaged.
Donotremovethearenutfromtheindoorunitpipeuntilimmediatelybefore
connecting the connection pipe.
(2) Centeringthepipeagainstportontheoutdoorunit,turnthearenutwithyour
hand.
Topreventgasleakage,
coatthearesurfacewith
alkylbenzeneoil(HAB).
Donotusemineraloil.
(3) Tightenthearenutoftheconnectionpipeattheoutdoorunitvalveconnector.
Connection pipe
(Liquid)
Connection pipe
(Gas)
Flare nuts
2-wayvalve
(Liquid)
3-way valve
(Gas)
5.3. Wiring method
5.3.1. Connection diagrams
Power supply
Power line
Earth(Ground)line
Outdoorunitsideterminal
Indoorunitsideterminal
Earth
(Ground)line
EARTH
(GROUND)
EARTH
(GROUND)
5.3.2. Cable preparation
• Keeptheearth(ground)wirelongerthantheotherwires.
Earth wire
60mm
Powersupplycableor
Connectioncable
75mm
5.3.3. Wiring procedure
(1) Removetheoutdoorunitswitchcover.(Referto“5.1.Switchcoverremoval”.)
(2) Removetheoutdoorunitcableclamp.
(3) Connectthepowersupplycableandtheconnectioncabletoterminal.
(4) Fastenthepowersupplycableandconnectioncablewithcableclamp.
(5) Install the switch cover. (Referto“5.1.Switchcoverremoval”.)
Screw
Cableclamp
Valves
Connectioncableand
powersupplycable
Runtheconnectioncableandpowersupply
cabletotherearoftheoutdoorunitbetween
the2valvesasshowninthegure.
(Fortheswitchcovertobeeasilyinstalled.)
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(4) Whenthearenutistightenedproperlybyyourhand,useatorquewrenchto
nallytightenit.
90°
Holding
wrench
Torquewrench
Flare nut
Flare nut
Connection pipe
(liquid)
Connection pipe
CAUTION
Holdthetorquewrenchatitsgrip,keepingitintherightanglewiththepipe,inorderto
tightenthearenutcorrectly.
Flare nut [mm (in.)] Tightening torque [N·m (kgf·cm)]
6.35(1/4)dia. 16to18(160to180)
9.52(3/8)dia. 32to42(320to420)
12.70(1/2)dia. 49to61(490to610)
15.88(5/8)dia. 63to75(630to750)
19.05(3/4)dia. 90to110(900to1100)
CAUTION
Fastenaarenutwithatorquewrenchasinstructedinthismanual.Iffastenedtoo
tight,thearenutmaybebrokenafteralongperiodoftimeandcausealeakageof
refrigerant.
Duringinstallation,makesurethattherefrigerantpipeisattachedrmlybeforeyou
runthecompressor.Donotoperatethecompressorundertheconditionofrefrigerant
pipingnotattachedproperlywith3-wayvalvesopen.Thismaycauseabnormal
pressureintherefrigerationcyclethatleadstobreakageandeveninjury.
5.5. Sealing test
WARNING
Beforeoperatingthecompressor,installthepipesandsecurelyconnectthem.Otherwise,
ifthepipesarenotinstalledandifthevalvesareopenwhenthecompressoroperates,air
couldentertherefrigerationcycle.Ifthishappens,thepressureintherefrigerationcyclewill
becomeabnormallyhighandcausedamageorinjury.
Aftertheinstallation,makesurethereisnorefrigerantleakage.Iftherefrigerantleaks
intotheroomandbecomesexposedtoasourceofresuchasafanheater,stove,or
burner,itproducesatoxicgas.
Donotsubjectthepipestostrongshocksduringthesealingtest.Itcanrupturethe
pipesandcauseseriousinjury.
CAUTION
Donotblockthewallsandtheceilinguntilthesealingtestandthechargingofthe
refrigerantgashavebeencompleted.
Formaintenancepurposes,donotburythepipingoftheoutdoorunit.
• Afterconnectingthepipes,performasealingtest.
• Makesurethatthe3-wayvalvesareclosedbeforeperformingasealingtest.
• Pressurizenitrogengasto4.15MPatoperformthesealingtest.
• Addnitrogengastoboththeliquidpipesandthegaspipes.
• Checkallareconnectionsandwelds.Then,checkthatthepressurehasnot
decreased.
• Comparethepressuresafterpressurizingandlettingitstandfor24hours,andcheck
that the pressure has not decreased.
*Whentheoutdoorairtemperaturechanges5°C,thetestpressurechanges
0.05MPa.Ifthepressurehasdropped,thepipejointsmaybeleaking.
• Ifaleakisfound,immediatelyrepairitandperformthesealingtestagain.
• Aftercompletingthesealingtest,releasethenitrogengasfrombothvalves.
• Release the nitrogen gas slowly.
5.6. Vacuum process
CAUTION
Performarefrigerantleakagetest(airtightnesstest)tocheckforleaksusingnitrogen
gaswhileallvalvesintheoutdoorunitareclosed.(Usethetestpressureindicatedon
thenameplate.)
Besuretoevacuatetherefrigerantsystemusingavacuumpump.
Therefrigerantpressuremaysometimesnotrisewhenaclosedvalveisopenedafter
thesystemisevacuatedusingavacuumpump.Thisiscausedbytheclosureofthe
refrigerantsystemoftheoutdoorunitbytheelectronicexpansionvalve.Thiswillnot
affecttheoperationoftheunit.
Ifthesystemisnotevacuatedsufciently,itsperformancewilldrop.
Useacleangaugemanifoldandcharginghosethatweredesignedspecicallyforuse
withR32(R410A).Usingthesamevacuumequipmentfordifferentrefrigerantsmay
damagethevacuumpumportheunit.
Donotpurgetheairwithrefrigerants,butuseavacuumpumptoevacuatethesystem.
Refrigerant for purging the air is not charged in the outdoor unit at the factory.
(1) Removethecap,andconnectthegaugemanifoldandthevacuumpumptothe
chargingvalvebytheservicehoses.
(2) Vacuumtheindoorunitandtheconnectingpipesuntilthepressuregaugeindicates
–0.1MPa(–76cmHg).
(3) When–0.1MPa(–76cmHg)isreached,operatethevacuumpumpforatleast
15minutes.
(4) Disconnecttheservicehosesandtthecaptothechargingvalvetothespecied
torque.
(5) Removetheblankcaps,andfullyopenthespindlesofthe3-wayvalveswitha
hexagonwrench[Torque:6~7N·m(60to70kgf·cm)].
(6) Tightentheblankcapsofthe3-wayvalvestothespeciedtorque.
Tightening torque
Blank cap
6.35mm(1/4in.) 20to25N·m(200to250kgf·cm)
9.52mm(3/8in.) 20to25N·m(200to250kgf·cm)
12.70mm(1/2in.) 28to32N·m(280to320kgf·cm)
15.88mm(5/8in.) 30to35N·m(300to350kgf·cm)
19.05mm(3/8in.) 35to40N·m(350to400kgf·cm)
Charging port cap 12.5to16N·m(125to160kgf·cm)
/R +L
Service valve
(Liquid)
Gaugemanifold
Flare nuts
Blankcaps
Vacuumpump
Charging port
Service valve
(Gas)
Usea4mmhexigonwrench
Charging port cap
5.7. Installing insulation
• Installinsulationmaterialafterconducting“5.5.Sealingtest”.
• Topreventcondensationandwaterdroplets,installinsulationmaterialontherefrigerant
pipe.
• Useinsulationwithheatresistanceabove120°C.
• Refertothetabletodeterminethethicknessoftheinsulationmaterial.
Selection of insulation
(Use an insulation material with equal heat transmission rate or below 0.040
W/(m·k))
Insulation material minimum thickness (mm)
Relative humidity ≤ 70% ≤ 75% ≤ 80% ≤ 85%
Pipediameter
(mm)
6.35 8 10 13 17
9.52 9 11 14 18
12.70 10 12 15 19
15.88 10 12 16 20
19.05 10 13 16 21
* Whentheambienttemperatureandrelativehumidityexceed32°C(DB)and85%
respectively,pleasestrengthentheheatinsulationofrefrigerantpipe.
6. TEST RUN
MakeaTESTRUNinaccordancewiththeinstallationmanualfortheindoorunit.
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