Fujitsu AOHG18KMTA Installation guide

AOHG18KMTA
Fujitsu
Brand
Fujitsu
Model
AOHG18KMTA
Category
Split-system air conditioners
Type
Installation guide

This manual is also suitable for

En-1
WARNING
• Installationofthisproductmustbedonebyexperiencedservicetechniciansor
professionalinstallersonlyinaccordancewiththismanual.Installationbynonprofes-
sional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refriger-
ant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refrigera-
tion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.
• 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installa-
tion.
• 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
• 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techni-
cians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.
AIRCONDITIONER
OUTDOORUNIT
INSTALLATION MANUAL
PARTNo.9319205304
Contents
1.SAFETYPRECAUTIONS.......................................................................1
2.PRODUCTSPECIFICATION.................................................................3
2.1.Installationtools...........................................................................3
2.2.Accessories.................................................................................4
2.3.Piperequirements.......................................................................4
2.4.Electricalrequirements................................................................4
2.5.Additionalchargeamount............................................................4
2.6.Generalinformation.....................................................................4
3.INSTALLATIONWORK..........................................................................5
3.1.Installationdimensions................................................................5
3.2.Mountingtheunit.........................................................................6
3.3.Removingandreplacingpart.......................................................6
3.4.Draininstallation..........................................................................6
3.5.Pipeinstallation...........................................................................7
3.6.Sealingtest..................................................................................7
3.7.Vacuumprocess..........................................................................8
3.8.Additionalcharging......................................................................8
3.9.Electricalwiring............................................................................8
4.TESTRUN..............................................................................................9
5.FINISHING...........................................................................................10
5.1.Installinginsulation....................................................................10
6.PUMPDOWN.......................................................................................10
1. SAFETY PRECAUTIONS
• Besuretoreadthismanualthoroughly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
customer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.
CAUTION
Indicatesapotentiallyhazardoussituationthatmayresultin
minorormoderateinjuryordamagetoproperty.
[Originalinstructions] Forauthorizedservicepersonnelonly.
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9319205304_IM.indb 1 2/20/2019 11:35:03
En-2
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containingcompo-
nents,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
connected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
possibility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
electrical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.
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.
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.Installation
tools”.)
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
diameter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inch.]
• 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.
(Handling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ac-
cordancewithanindustryrecognisedassessmentspecication.
• Servicingshallonlybeperformedasrecommendedbytheequipmentmanufac-
turer.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cient-
ly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break-
ing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.
9319205304_IM.indb 2 2/20/2019 11:35:05
En-3
CAUTION
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
consideration.
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atmos-
phere,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refriger-
ant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commis-
sioning.
• 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refrig-
erant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re-
moved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.
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. PRODUCT SPECIFICATION
2.1. Installation tools
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.
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conven-
tionalrefrigerant,itisnecessarytochooseadequatematerials.
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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
Drainpipe
1
Foroutdoorunitdrainpipingwork
(Maynotbesupplied,dependingon
themodel.)
Additional materials
Connectionpipeassembly Wallcap
Connectioncable Saddle
Wallpipe Drainhose
Decorativetape Tappingscrews
Vinyltape Sealant
2.3. Pipe requirements
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
■
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
■
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 18 24
Pipediameter<Liquid/Gas>[mm(in.)] 6.35(1/4)/12.7(1/2)
Max.pipinglength(L)[m] 25 30
Max.heightdifference(H)
<Indoorunittooutdoorunit>[m]
20 25
View(Example)
H
L
2.4. Electrical requirements
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230V(50Hz)
Operating range 198to264V
Cable Conductorsize[mm²]
*1
Type Remarks
PowerSupplyCable 2.5 Type60245IEC57
2wire+Ground
1Φ230V
ConnectionCable 1.5-2.5 Type60245IEC57
3wire+Ground
1Φ230V
*1
Selectedsample:Selectthecorrectcabletypeandsizeaccordingtothecountryor
region’sregulations.
*Limitthevoltagedroplessthan2%.Increasethecablediameterifvoltagedropis2%
ormore.
Model
Breaker capacity
[A]
Earth leakage breaker
[mA]
18model 16
30
24model 20
• Selecttheappropriatebreakerofthedescribedspecicationaccordingtothenational
orregionalstandards.
• 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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)
• Installthecircuitbreakernearbytheunits.
2.5. Additional charge amount
CAUTION
• Whenaddingrefrigerant,addtherefrigerantfromthechargingportatthecompletion
ofwork.
• Themaximumlengthofthepipingis25m(18model)/30m(24model).Iftheunits
arefurtherapartthanthis,correctoperationcannotbeguaranteed.
Refrigerantsuitableforapipinglengthof15mischargedintheoutdoorunitatthefactory.
Whenthepipingislongerthan15m,additionalchargingisnecessary.
Fortheadditionalamount,seethefollowingtable.
Model Pipelength 15m 20m 25m 30m Rate
18
Additional
refrigerant
None +100g +200g ― 20g/m
24 None +100g +200g +300g 20g/m
Between15m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.
2.6. General information
• Iftheunitisoperatedoutsidetheoperatingtemperaturerange,variousprotective
circuitmechanismsmaybeactivatedandtheunitmaystopoperating.Forthe
operatingtemperaturerange,refertotheproductFICHEorthespecicationmanual.
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3. INSTALLATION WORK
Makesuretoobtainthecustomer’sapprovalforselectingandinstallingtheoutdoorunit.
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)Duringheatingoperation,drainwaterowsfromtheoutdoorunit.
Therefore,installtheoutdoorunitinaplacewherethedrainwaterowwillnotbe
obstructed.
(6)Donotinstalltheunitwherestrongwindblowsorwhereitisverydusty.
(7)Donotinstalltheunitwherepeoplepass.
(8)Installtheoutdoorunitinaplacewhereitwillbefreefrombeingdirtyorgettingwetby
rainasmuchaspossible.
(9)Installtheunitwhereconnectiontotheindoorunitiseasy.
3.1. 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.
■
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
■
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.
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
9319205304_IM.indb 5 2/20/2019 11:35:14
En-6
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
■
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
200ormore
1,000ormore
200ormore
250ormore
CAUTION
• Donotinstalltheoutdoorunitintwo-stagewherethedrainwatercouldfreeze.
Otherwisethedrainagefromtheupperunitmayformiceandcauseamalfunctionof
thelowerunit.
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.
3.2. Mounting the unit
• 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
Dimensions
A
18model 580
24model 600
CAUTION
• Donotinstalltheoutdoorunitintwo-stagewherethedrainwatercouldfreeze.
Otherwisethedrainagefromtheupperunitmayformiceandcauseamalfunctionof
thelowerunit.
• Whentheoutdoortemperatureis0°Corless,donotusetheaccessorydrainpipe.
Ifthedrainpipeisused,thedrainwaterinthepipemayfreezeinextremelycold
climate.
Base
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.
3.3. Removing and replacing part
■
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.
Screws
Switchcover
Hooks
Holes
WARNING
• Installtheunitwhereitwillnotbetiltedbymorethan3°.
• Wheninstallingtheoutdoorunitwhereitmayexposedtostrongwind,fastenit
securely.
3.4. Drain installation
CAUTION
• PerformdrainworkinaccordancewiththisManual,andensurethatthedrainwater
isproperlydrained.Ifthedrainworkisnotcarriedoutcorrectly,watermaydripdown
fromtheunit,wettingthefurniture.
• Whentheoutdoortemperatureis0°Corless,donotusetheaccessorydrainpipe.
Ifthedrainpipeisused,thedrainwaterinthepipemayfreezeinextremelycold
weather.
•Ifyouareinstallingthedrainpipe,please
provideaworkingspaceunderthebaseof
theoutdoorunit.
•Asthedrainwaterflowsoutoftheoutdoor
unitduringheatingoperation,installthe
drainpipeandconnectittoacommercial
16mmhose.
•Wheninstallingthedrainpipe,plugallthe
holesotherthanthedrainpipemounting
holeinthebottomoftheoutdoorunitwith
puttysothereisnowaterleakage.
Baseoftheoutdoorunit
Drainpipe
Drainpipemountinghole
9319205304_IM.indb 6 2/20/2019 11:35:19
En-7
(Unit:mm)
AIR
Drainpipemountinghole
A
B
Dimensions
A B
18model 252 399
24model 277 409
3.5. Pipe installation
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
A(mm)
Flaringtoolfor
R32orR410A,clutchtype
Conventional(R22)Flaringtool
Clutchtype Wingnuttype
ø6.35mm(1/4")
0to0.5 1.0to1.5 1.5to2.0
ø9.52mm(3/8")
ø12.70mm(1/2")
ø15.88mm(5/8")
ø19.05mm(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to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connect-
ing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)
(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pres-
sureintherefrigerationcyclethatleadstobreakageandeveninjury.
3.6. 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.
9319205304_IM.indb 7 2/20/2019 11:35:22
En-8
CAUTION
• Aftervacuumingthesystem,addrefrigerant.
• Donotreuserecoveredrefrigerant.
• WhenchargingtherefrigerantR32,alwaysuseanelectronicscalesforrefrigerant
charging(tomeasuretherefrigerantbyweight).Addingmorerefrigerantthanthe
speciedamountwillcauseamalfunction.
• Whenchargingtherefrigerant,takeintoaccounttheslightchangeinthe
compositionofthegasandliquidphases,andalwayschargefromtheliquidphase
sidewhosecompositionisstable.
• Checkifthesteelcylinderhasasiphoninstalledornotbeforelling.(Thereisan
indication“withsiphonforllingliquid”onthesteelcylinder.)
Filling method for cylinder with siphon
R32
Gas
Liquid
Setthecylinderverticalandllwiththeliquid.
(Liquidcanbelledwithoutturningbottomupwiththe
siphoninside.)
Filling method for other cylinders
R32
Gas
Liquid
Turnbottomupandllwithliquid.
(Becarefultoavoidturningoverthecylinder.)
• BesuretousethespecialtoolsforR32(R410A)forpressureresistanceandto
avoidmixingofimpuresubstances.
• Iftheunitsarefurtherapartthanthemaximumpipelength,correctoperationcan
notbeguaranteed.
• Makesuretobackclosingvalveafterrefrigerantcharging.Otherwise,the
compressormayfail.
• Minimizerefrigerantreleasetotheair.Excessivereleaseisprohibitedunderthe
FreonCollectionandDestructionLaw.
3.9. 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230Vat50Hz.Itshouldbe
operatedwithintherangeof198to264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,other-
wise,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.Im-
properwiringcandamagetheentiresystem.
3.7. 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sys-
tem.
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
60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
3.8. Additional charging
WARNING
• Whenmovingandinstallingtheairconditioner,donotmixgasotherthanthe
speciedrefrigerantR32inside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breakage,injury,etc.
Chargetherefrigerantfollowingtheinstructionin“2.5.Additionalchargeamount”.
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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.
• 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.
• Transmissioncablebetweenindoorunitandoutdoorunitis230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gurebelow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tablebelow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)
■
Wiring method
(1) Removetheoutdoorunitswitchcover.(See“3.3.Removingandreplacingpart”.)
(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.(See“3.3.Removingandreplacingpart”.)
Screw
Cableclamp
Valves
Connectioncableand
power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.)
■
Connection diagrams
Powersupply
Powerline
Earth(Ground)line
Outdoorunitsideterminal
Indoorunitsideterminal
Earth
(Ground)line
EARTH
(GROUND)
EARTH
(GROUND)
■
Cable preparation
• Keeptheearth(ground)wirelongerthantheotherwires.
Earthwire
60mm
Powersupplycableor
Connectioncable
75mm
CAUTION
• Matchtheterminalblocknumbersandconnectioncablecolorswiththoseofthe
indoorunit.
Erroneouswiringmaycauseburningoftheelectricparts.
• Connecttheconnectioncablesrmlytotheterminalblock.Imperfectinstallationmay
causeare.
• Alwaysfastentheoutsidecoveringoftheconnectioncablewiththecableclamp.(If
theinsulatorischafed,electricleakagemayoccur.)
• Securelyearththepowercable.
• Donotusetheearthscrewforanexternalconnector.Onlyuseforinterconnection
betweentwounits.
4. TEST RUN
MakeaTESTRUNinaccordancewiththeinstallationmanualfortheindoorunit.
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5. FINISHING
5.1. Installing insulation
• DeterminethethicknessoftheinsulationmaterialbyreferringtoTableA.
Table A, Selection of insulation
(for using an insulation material with equal heat transmission rate or below
0.040 W/(m·k))
Relative humidity
[mm (in.)]
Insulation material
Minimum thickness [mm]
70%
or more
75%
or more
80%
or more
85%
or more
Pipediameter
6.35(1/4) 8 10 13 17
9.52(3/8) 9 11 14 18
12.70(1/2) 10 12 15 19
15.88(5/8) 10 12 16 20
19.05(3/4) 10 13 16 21
• Iftheambienttemperatureandrelativehumidityexceed32°C,increasethelevelof
heatinsulationfortherefrigerantpipes.
6. PUMP DOWN
■
Pump down operation (forced cooling operation)
Toavoiddischargingrefrigerantintotheatmosphereatthetimeofrelocationordisposal,
recoverrefrigerantbydoingtheforcedcoolingoperationaccordingtothefollowing
procedure.
(1) Conductpreliminaryoperationfor5to10minutesusingtheforcedcoolingoperation.
Starttheforcedcoolingoperation.Keeponpressingthe[MANUALAUTO]ofthe
indoorunitformorethan10seconds.Theoperationindicatorlampandtimerindicator
lampwillbegintoashsimultaneouslyduringtestrun.(Theforcedcoolingoperation
cannotstartifthe[MANUALAUTO]isnotkeptonpressingformorethan10seconds.)
(2) Closethevalvestemof2-wayvalvecompletely.
(3) Continuetheforcedcoolingoperationfor2to3minutes,thencloseallthevalve
stemsonthe3-wayvalves.
(4) Stoptheoperation.
•Pressthe[START/STOP]oftheremotecontrollertostoptheoperation.
•Pressthe[MANUALAUTO]whenstoppingtheoperationfromtheindoorunitside.
(Itisnotnecessarytopressdownformorethan10seconds.)
CAUTION
Pleasechecktherefrigerantcircuitforanyleaksbeforestartingthepumpdownopera-
tion.
Donotproceedwiththepumpdownoperationifthereisnorefrigerantleftinthecircuit
duetobentorbrokenpiping
Duringthepumpdownoperation,besuretoturnoffthecompressorbeforeremoving
therefrigerantpiping.
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Fujitsu AOHG18KMTA Installation guide

AOHG18KMTA
Fujitsu
Brand
Fujitsu
Model
AOHG18KMTA
Category
Split-system air conditioners
Type
Installation guide
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