Fujitsu AOHG18KBTA2 Installation guide

Brand: Fujitsu

Model: AOHG18KBTA2

Category: Split-system air conditioners

Type: Installation guide

This manual is also suitable for

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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

• 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.9319205281-02

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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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................................................................5

2.5.Additionalchargeamount............................................................6

2.6.Generalinformation.....................................................................6

3.INSTALLATIONWORK..........................................................................6

3.1.Installationdimensions................................................................6

3.2.Mountingtheunit.........................................................................7

3.3.Removingandreplacingpart.......................................................8

3.4.Draininstallation..........................................................................8

3.5.Pipeinstallation...........................................................................8

3.6.Sealingtest..................................................................................9

3.7.Vacuumprocess..........................................................................9

3.8.Additionalcharging....................................................................10

3.9.Electricalwiring..........................................................................10

4.TESTRUN............................................................................................12

4.1.MakeaTESTRUNinaccordancewiththeinstallation

Manualfortheindoorunit.......................................................... 12

5.FINISHING...........................................................................................12

5.1.Installinginsulation....................................................................12

6.PUMPDOWN.......................................................................................12

9319205281-02_IM.indb 1 18-Jun-19 3:07:20 PM

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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.There-

fore,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

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.

9319205281-02_IM.indb 2 18-Jun-19 3:07:20 PM

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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atmo-

spheric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.

9319205281-02_IM.indb 3 18-Jun-19 3:07:20 PM

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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

Thismanual

Drainpipe

Foroutdoorunitdrainpipingwork

[Heat&Coolmodel(Reversecycle)

only]

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.

Layoutexamplefortheindoorunitsandoutdoorunit.

OUTDOOR UNIT : 18 TYPE

Outdoorunit

Indoorunit

UnitB

7-14

Connection

cable

Powercable

Circuitbreaker

PowerSource

230V~50Hz

Refrigerant

pipe

UnitA

7-14

● Connectable indoor unit capacity type

CAUTION

• Thetotalcapacityoftheindoorunitsconnectedmustbebetween14,000and

24,000BTU.

• Besuretochecktheconnectingpatternintechnicalmanualwheninstalledsince

connectionpatternisspeciedinit.Operationcannotbeguaranteedifconnectedby

amethodnotspeciedinit.Itcancausethefaultoftheproduct.

• Pleaseconnecttobothofindoorunitandoutdoorunitcertainly.

•Toinstallanindoorunit,refertotheinstallationManualincludedwiththeindoorunit.

Outdoor port Connectable model name

A 7-14

B 7-14

UNITBø6.35,ø9.52

UNITAø6.35,ø9.52

OUTDOOR UNIT : 14 TYPE

Outdoorunit

Indoorunit

UnitB

7-12

Connection

cable

Powercable

Circuitbreaker

PowerSource

230V~50Hz

Refrigerant

pipe

UnitA

7-12

9319205281-02_IM.indb 4 18-Jun-19 3:07:21 PM

En-5

● Connectable indoor unit capacity type

CAUTION

• Thetotalcapacityoftheindoorunitsconnectedmustbebetween14,000and

21,000BTU.

• Besuretochecktheconnectingpatternintechnicalmanualwheninstalledsince

connectionpatternisspeciedinit.Operationcannotbeguaranteedifconnectedby

amethodnotspeciedinit.Itcancausethefaultoftheproduct.

• Pleaseconnecttobothofindoorunitandoutdoorunitcertainly.

•Toinstallanindoorunit,refertotheinstallationManualincludedwiththeindoorunit.

Outdoor port Connectable model name

A 7-12

B 7-12

UNITBø6.35,ø9.52

UNITAø6.35,ø9.52

● Limitation of refrigerant piping length

CAUTION

• Thetotalmaximumpipelengthsandheightdifferenceofthisproductareshownin

thetable.

• Iftheunitsarefurtherapartthanthis,correctoperationcannotbeguaranteed.

Total max. length (a+b) 30m

Max. length for each indoor unit

(a or b)

20m

Max. height difference between out-

door unit and each indoor unit (H1)

15m

Max. height difference between

indoor units (H2)

10m

Min. length for each indoor unit

(a or b)

2.5m

Total min. length (a+b) 5m

 Ifthetotalpipinglengthislongerthan20m,additionalrefrigerantchargingisneces-

sary.(Formoreinformation,referto“3.8.Additionalcharging”.)

● Selecting pipe sizes

Thediametersoftheconnectionpipesdifferaccordingtothecapacityoftheindoorunit.

Refertothefollowingtablefortheproperdiametersoftheconnectionpipesbetweenthe

indoorandoutdoorunits.

Capacity of indoor

unit

Gas pipe size

(thickness) [mm]

Liquid pipe size (thick-

ness) [mm]

7–14 ø9.52(0.8) ø6.35(0.8)

CAUTION

• Operationcannotbeguaranteedifthecorrectcombinationofpipes,valves,etc.,is

notusedtoconnecttheindoorandoutdoorunits.

● Heat insulation around connection pipes requirements

CAUTION

• Installheatinsulationaroundboththegasandliquidpipes.Failuretodosomay

causewaterleaks.

• Useheatinsulationwithheatresistanceabove120°C.(Reversecyclemodelonly)

• Inaddition,ifthehumiditylevelattheinstallationlocationoftherefrigerantpipingis

expectedtoexceed70%,installheatinsulationaroundtherefrigerantpiping.Ifthe

expectedhumiditylevelis70-80%,useheatinsulationthatis15mmorthickerandif

theexpectedhumidityexceeds80%,useheatinsulationthatis20mmorthicker.

• Ifheatinsulationisusedthatisnotasthickasspecied,condensationmayformon

thesurfaceoftheinsulation.

• Inaddition,useheatinsulationwithheatconductivityof0.045W/(m·K)orless

(at20°C).

Connecttheconnectionpipesaccordingto“3.5.Pipeinstallation”inthisinstallation

Manual.

2.4. Electrical requirements

WARNING

• Alwaysuseaspecialbranchcircuitandinstallaspecialreceptacletosupplypowerto

theairconditioner.

• Useaspecialbranchcircuitbreakerandreceptaclematchedtothecapacityoftheair

conditioner.(Installinaccordancewithstandard.)

• Performwiringworkinaccordancewithstandardssothattheairconditionercanbe

operatedsafelyandpositively.

• Installaleakagespecialbranchcircuitbreakerinaccordancewiththerelatedlaws

andregulationsandelectriccompanystandards.

CAUTION

• Whenthevoltageislowandtheairconditionerisdifculttostart,contactthepower

companythevoltageraised.

• 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

Cable size

(mm

)

Type Remarks

Powersupplycable 1.5 Type60245IEC57

2cable+Earth(Ground),

1Ø230V

Connectioncable 1.5 Type60245IEC57

3cable+Earth(Ground),

1Ø230V

 Selectedsample:Selectthecorrectcabletypeandsizeaccordingtothecountryor

region’sregulations.

Max.wirelength:Setalengthsothatthevoltagedropislessthan2%.Increasethe

wirediameterwhenthewirelengthislong.

Breaker Specication

Circuitbreaker(overcurrent) Current:15(A)

Earthleakagebreaker Leakagecurrent:30mA0.1secorless

 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3mminallpolesnearbythe

units.(Bothindoorunitandoutdoorunit)

•Wiringsizemustcomplywiththeapplicablelocalandnationalcode.

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2.5. Additional charge amount

CAUTION

• Whenaddingrefrigerant,addtherefrigerantfromthechargingportatthecompletion

ofwork.

Refrigerantsuitableforatotalpipinglengthof20mischargedintheoutdoorunitatthe

factory.

Whenthepipingislongerthan20m,additionalchargingisnecessary.

Fortheadditionalamount,seethetablebelow.

Total piping length

20m 30m Rate

Additional

refrigerant

14 type

None 200g 20g/m

18 type

None 200g 20g/m

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.

3. INSTALLATION WORK

Pleaseobtaintheapprovalofthecustomerwhenselectingthelocationofinstallationand

installingthe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.

• Pleaseinstalltheoutdoorunitwithoutslant.

• 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.

CAUTION

•

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.)

Branchswitchand

circuitbreaker

Branchswitchand

circuitbreaker

1mormore

1mormore

• 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

WARNING

• Donotinstallwherethereisthedangerofcombustiblegasleakage.

• Donotinstalltheunitnearheatsourceofheat,steam,orammablegas.

• Ifchildrenunder10yearsoldmayapproachtheunit,takepreventivemeasuresso

thattheycannotreachtheunit.

CAUTION

• Selectinstallationlocationsthatcanproperlysupporttheweightoftheindoorand

outdoorunits.Installtheunitssecurelysothattheydonottoppleorfall.

• Installtheunitwhereitwillnotbetiltedbymorethan3˚.However,donotinstallthe

unitwithittiltedtowardsthesidecontainingthecompressor.

• Wheninstallingtheoutdoorunitwhereitmayexposedtostrongwind,fastenit

securely.

• 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.

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■

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

(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

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

(2)Obstaclesatfrontonly

1,000ormore

(3)Obstaclesatfrontandrear

200ormore

1,000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

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

2,000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.

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.

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AIR

Bottomside

Drainpipemountingplace

Sincethedrainwaterowsoutoftheoutdoorunitduringheatingoperation,installthedrain

pipeandconnectittoacommercial16mmhose.(Reversecyclemodelonly)

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.(Reversecycle

modelonly)

Baseoftheoutdoorunit

Drainpipe

Drainpipemountinghole

3.5. Pipe installation

CAUTION

• Donotusemineraloilonaaredpart.Preventmineraloilfromgettingintothesys-

temasthiswouldreducethelifetimeoftheunits.

• Whileweldingthepipes,besuretoblowdrynitrogengasthroughthem.

• Themaximumlengthsofthisproductareshowninthetable.Iftheunitsarefurther

apartthanthis,correctoperationcannotbeguaranteed.

■

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

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

CAUTION

• Topreventbreakingofthepipe,avoidsharpbends.Bendthepipewitharadiusof

curvatureof100mmormore.

• Ifthepipeisbentrepeatedlyatthesameplace,itwillbreak.

•Ifpipesareshapedbyhand,becarefulnottocollapsethem.

•Donotbendthepipesatanangleofmorethan90°.

•Whenpipesarerepeatedlybentorstretched,thematerialwillharden,makingitdifcultto

bendorstretchthemanymore.

•Donotbendorstretchthepipesmorethan3times.

AIR

Bottomside

580mm

330mm

Fixsecurelywithboltsonasolidblock.(Use4setsofcommerciallyavailableM10bolt,

nutandwasher.)

Bolt

Nut

Block

CAUTION

• Donotinstalltheoutdoorunitintwo-stagewherethedrainwatercouldfreeze.Oth-

erwise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preven-

tion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

Hole

Hook

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

anddraincap.Ifthedrainpipeanddraincapareused,thedrainwaterinthepipe

mayfreezeinextremelycoldweather.(Reversecyclemodelonly)

• Outdoorunittobefastenwithboltsatthefourplacesindicatedbythearrowswithout

fail.

9319205281-02_IM.indb 8 18-Jun-19 3:07:25 PM

En-9

■

Flare connection

CAUTION

• Besuretoinstall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outdoorunitpipeuntilimmediatelybefore

connectingtheconnectionpipe.

• Afterinstallingthepiping,makesurethattheconnectionpipesdonottouchthe

compressororouterpanel.Ifthepipestouchthecompressororouterpanel,theywill

vibrateandproducenoise.

(1) Detachthecapsandplugsfromthepipes.

(2) Centerthepipeagainsttheportontheoutdoorunit,andthenturnthearenutbyhand.

Topreventgasleakage,coattheare

surfacewithalkylbenzeneoil(HAB).

Donotusemineraloil.

(3) Attachtheconnection

pipe.

Flarenut

Connectionpipe

(Liquid)

UNITB

UNITA

Connectionpipe(Gas)

Flarenut

3-wayvalve(Gas)

2-wayvalve(Liquid)

(4) Whenthearenutis

tightenedproperlybyyour

hand,useatorquewrench

tonallytightenit.

Holdingspanner

Torquewrench

Bodyside

CAUTION

• Holdthetorquewrenchatitsgrip,keepingitinarightanglewiththepipe,inorderto

tightenthearenutcorrectly.

•Outerpanelmaybedistortediffastenedonlywithawrench.Besuretoxtheelemen-

tarypartwithaholdingwrench(spanner)andfastenwithatorquewrench(refertobelow

diagram).Donotapplyforcetotheblankcapofthevalveorhangawrench,etc.,onthe

cap.Ifblankcapisbroken,itmaycauseleakageofrefrig

erant.

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compres-

sor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.

3.7. Vacuum process

CAUTION

• Alwaysuseavacuumpumptopurgetheair.

• Refrigerantforpurgingtheairisnotchargedintheoutdoorunitatthefactory.

• Refrigerantmustnotbedischargedintoatmosphere.

• Useavacuumpump,gaugemanifoldandchargehoseforR32exclusively.Usingthe

samevacuumfordifferentrefrigerantsmaydamagethevacuumpumportheunit.

• Afterconnectingthepiping,checkthejointsforgasleakagewithgasleakdetectoror

soapywater.

■

Checking gas leakage and purging air

Gasleakchecksareperformedusingeithervacuumornitrogengas,soselecttheproper

onedependingonthesituation.

Checkinggasleakswithvacuum:

(1) Checkifthepipingconnectionsaresecure.

(2) Removethecapof3-wayvalve,andconnectthegaugemanifoldchargehosestothe

chargingportofthe3-wayvalve.

(3) Openthevalveofthegaugemanifoldfully.

(4) Operatethevacuumpumpandstartpumpdown.

(5) Checkthatthecompoundpressuregaugereads-0.1MPa(76cmHg),operatethe

vacuumpumpfor30minutesormoreineachvalve.

(6) Attheendofpumpdown,closethevalveofthegaugemanifoldfullyandstopthe

vacuumpump.

(Itchecksthatleaveasitisforabout10minutes,andaneedledoesnotreturn.)

(7) Disconnectthechargehosefromthe3-wayvalvechargingport.

(8) Removetheblankcaps,andfullyopenthespindlesofthe2-wayand3-wayvalves

withahexagonwrench.

[torque:6to7N·m(60to70kgf·cm)].

(9) Tightentheblankcapsandchargingportcapofthe2-wayvalveand3-wayvalveto

thespeciedtorque.

Checkinggasleakswithnitrogengas:

(1) Checkifthepipingconnectionsaresecure.

(2) Removethecapof3-wayvalve,andconnectthegaugemanifoldchargehosestothe

chargingportofthe3-wayvalve.

(3) Pressurizewithnitrogengasusingthe3-wayvalvechargingport.

(4) Donotpressurizeuptothespeciedpressureallatoncebutdosogradually.

Increasethepressureupto0.5Mpa(5kgf/cm2),letitsitforaboutveminutes

 andthencheckforanydecreaseinpressure.

Increasethepressureupto1.5Mpa(15kgf/cm2),letitsitforaboutveminutes

 andthencheckforanydecreaseinpressure.

Increasethepressureuptothespeciedpressure(thepressuredesignedforthe

 product)andthenmakeanoteofit.

(5) Letitsitatthespeciedpressureandifthereisnodecreaseinpressurethenitis

satisfactory.Ifapressuredecreaseisconrmed,thereisaleak,soitisnecessaryto

specifytheleaklocationandmakeminoradjustments.

9319205281-02_IM.indb 9 18-Jun-19 3:07:25 PM

En-10

(6) Dischargethenitrogengasandstartingremovingthegaswithavacuumpump.

(7) Openthevalveofthegaugemanifoldfully.

(8) Operatethevacuumpumpandstartpumpdown.

(9) Checkthatthecompoundpressuregaugereads-0.1MPa(76cmHg),operatethe

vacuumpumpfor30minutesormoreineachvalve.

(10) Attheendofpumpdown,closethevalveofthegaugemanifoldfullyandstopthe

vacuumpump.

(11) Disconnectthechargehosefromthe3-wayvalvechargingport.

(12) Removetheblankcaps,andfullyopenthespindlesofthe2-wayand3-wayvalves

withahexagonwrench.

[torque:6to7N·m(60to70kgf·cm)].

(13) Tightentheblankcapsandchargingportcapofthe2-wayvalveand3-wayvalve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(3/4in.) 35to40N·m(350to400kgf·cm)

Charging port cap

10to12N·m(100to120kgf·cm)

ChargingportCap

Outdoorunit

Connectingpipe

Blankcap

Servicehosewithvalvecore

Chargingport

3-wayvalve

Hexagonwrench

Usea4mm

hexagonwrench

Gaugemanifold

LO HI

Vacuumpump

Chargehose

CAUTION

• Donotpurgetheairwithrefrigerants,butuseavacuumpumptovacuumthe

installation!Thereisnoextrarefrigerantintheoutdoorunitforairpurging!

• UseavacuumpumpandgaugemanifoldandcharginghoseforR32exclusively.

Usingthesamevacuumfordifferentrefrigerantsmaydamagethevacuumpumpor

theunit.

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”.

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composi-

tion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compres-

sor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.

• Beforeservicingtheunit,turnthepowersupplyswitchOFF.Then,donottouch

electricpartsfor5minutesduetotheriskofelectricshock.

• Makesuretoperformgroundingwork.Impropergroundingworkcancauseelectric

shocks.

9319205281-02_IM.indb 10 18-Jun-19 3:07:26 PM

En-11

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wir-

ing.Compressormayfailifoperatedwhileremoved.

• Alwayskeeptothemaximumlengthoftheconnectioncable.Exceedingthemaxi-

mum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.

• Donotfastenthepowersupplycableandconnectioncabletogether.

■

How to connect wiring to the terminal

•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.

Earth(Ground)wire

Powercableor

Connectioncable

60mm

75mm

How to connect wiring to the terminal

Caution when wiring cable

(1) Use crimp-type terminals with insulating sleeves as shown in the gure to con-

nect to the terminal block.

(2) Securely clamp the crimp-type terminals to the wires using an appropriate tool

so that the wires do not come loose.

(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.

(6) See the table below for the terminal screw tightening torques.

Strip:10mm

Wire

Terminalblocks

Crimp-type

terminal

Sleeve

Wire

Crimp-type

terminal

Screwwith

specialwasher

Screwwithspecialwasher

Crimp-typeterminal

Tightening torque [N·m (kgf·cm)]

M4screw 1.2to1.8(12to18)

■

Connection diagrams

Powercable

Earth(Ground)

POWER

230V

50Hz·1ø

Connectioncable

■

Outdoor unit

(1) Switchcoverremoval

•Removethexing

screws.

•Lifttheswitchcover

upward,andthenpullit

outwardtoremoveit.

Hook

Switch

cover

Screw

(2) Connectthepower

supplycableandthe

connectioncableto

terminal.

Fastenthepower

supplycableand

connectioncablewith

cableclamp.

POWER

UNITA UNITB

Cable

clamp

Cableclamp

Connectioncable

Powercable

(3) Asillustrated,drawout

thepowercableand

theconnectioncable.

Powercable

Connectioncable

(4) Installtheswitchcover.

Switchcover

9319205281-02_IM.indb 11 18-Jun-19 3:07:27 PM

En-12

4. TEST RUN

Thetestrunmethodmaybedifferentforeachindoorunitthatisconnected.Refertothe

installationManualincludedwitheachindoorunit.

CAUTION

• Alwaysturnonthepower12hourspriortothestartoftheoperationinorderto

ensurecompressorprotection.

4.1. Make a TEST RUN in accordance with the

installation Manual for the indoor unit

4. 1. 1. CHECK ITEMS

● INDOOR UNIT

(1) Isoperationofeachbuttonontheremotecontrollernormal?

(2) Doeseachlamplightnormally?

(3) Dotheairow-directionlouveroperatenormally?

(4) Isthedrainnormal?

(5) Isthereanyabnormalnoiseandvibrationduringoperation?

● OUTDOOR UNIT

(1) Isthereanyabnormalnoiseandvibrationduringoperation?

(2) Willnoise,wind,ordrainwaterfromtheunitdisturbtheneighbors?

(3) Isthereanygasleakage?

•Donotoperatetheairconditionerinthetestrunningstateforalongtime.

•Fortheoperationmethod,refertotheoperatingmanualandperformoperationcheck.

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

Toavoiddischargingrefrigerantintotheatmosphereatthetimeofrelocationordisposal,

recoverrefrigerantbydoingthecoolingoperationorforcedcoolingoperationaccordingto

thefollowingprocedure.(Whenthecoolingoperationcannotstartinwinter,andsoon,start

theforcedcoolingoperation.)

(1) Dotheairpurgingofthechargehosebyconnectingthecharginghoseofgauge

manifoldtothechargingportof3wayvalve(UNITAandUNITB)andopeningthelow

pressurevalveslightly.

(2) Closethevalvestemof2wayvalve(UNITAandUNITB)completely.

(3) Startthecoolingoperationorfollowingforcedcoolingoperation.(UNITAandUNITB)

WhenusingtheremotecontrollerPresstheTESTRUNbuttonafterstartingthecooling

operationbytheremotecontroller.Theoperationindicatorlampandtimerindicator

lampwillbegintoashsimultaneouslyduringtestrun.WhenusingtheMANUALAUTO

buttonoftheindoorunit(Theremotecontrollerislost,andsoon.)Keeponpressing

theMANUALAUTObuttonoftheindoorunitformorethan10seconds.(Theforced

coolingoperationcannotstartiftheMANUALAUTObuttonisnotkeptonpressingfor

morethan10seconds.)

(4) Closethevalvestemof3wayvalve(UNITAandUNITB)whenthereadingonthe

compoundpressuregaugebecomes0.05~0Mpa(0.5~0kg/cm

(5) Stoptheoperation.(UNITAandUNITB)PresstheSTART/STOPbuttonoftheremote

controllertostoptheoperation.PresstheMANUALAUTObuttonwhenstoppingthe

operationfromindoorunitside.(Itisnotnecessarytopressonkeepingformorethan

10seconds.)

CAUTION

• Duringthepump-downoperation,makesurethatcompressorisoffbeforeyou

removetherefrigerantpiping.Donotremovetheconnectionpipewhilethe

compressorisinoperationwith2or3wayvalveopen.Thismaycauseabnormal

pressureintherefrigerationcyclethatbreakageandinjury.

9319205281-02_IM.indb 12 18-Jun-19 3:07:27 PM

Fujitsu AOHG18KBTA2 Installation guide

Brand: Fujitsu

Model: AOHG18KBTA2

Category: Split-system air conditioners

Type: Installation guide

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Fujitsu AOHG18KBTA2 Installation guide

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