Fujitsu AOTG34KMTC Installation guide

Brand: Fujitsu

Model: AOTG34KMTC

Type: Installation guide

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1. SAFETY PRECAUTIONS

• Besuretoreadthismanualcarefullybeforeinstallation.

• Thewarningsandprecautionsindicatedinthismanualcontainimportantinformation

pertainingtoyoursafety.Besuretoobservethem.

• Handthismanual,togetherwiththeoperatingmanual,tothecustomer.Requestthe

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.

WARNING

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.

Installationofthisproductmustbedonebyexperiencedservicetechniciansor

professionalinstallersonlyinaccordancewiththismanual.Installationby

non-professional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.

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anelectricshockorre.

Ifrefrigerantleakswhenyouareworking,ventilatethearea.Iftheleakingrefrigerantis

exposedtoadirectame,itmayproduce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installingplace.

Donotusethisequipmentwithairoranyotherunspeciedrefrigerantintherefrigerant

lines.Excesspressurecancausearupture.

Duringinstallation,makesurethattherefrigerantpipeisattachedrmlybeforeyourun

thecompressor.

Donotoperatethecompressorundertheconditionofrefrigerantpipingnotattached

properlywith3-wayvalveopen.Thismaycauseabnormalpressureintherefrigeration

cyclethatleadstobreakageandeveninjury.

Wheninstallingand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breakage,injury,etc.

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breakageand

eveninjury.

Toconnecttheindoorandoutdoorunit,useairconditionerpipingandcablesavailable

locallyasstandardparts.Thismanualdescribesproperconnectionsusingsuch

installationset.

Donotmodifypowercable,useextensioncableorbranchwiring.Improperusemay

causeelectricshockorrebypoorconnection,insufcientinsulationorovercurrent.

Donotpurgetheairwithrefrigerantsbutuseavacuumpumptovacuumtheinstallation.

Thereisno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.

Donotmodifythisunit,suchasopeningaholeinthecabinet.

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breakage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.

Contents

1. SAFETYPRECAUTIONS............................................................................................1

2. PRODUCTSPECIFICATION....................................................................................... 4

2.1. Installationtools.................................................................................................4

2.2. Accessories........................................................................................................4

2.3. Piperequirements..............................................................................................4

2.4. Electricalrequirements.......................................................................................5

2.5. Additionalchargeamount..................................................................................5

2.6. Optionalparts.....................................................................................................5

2.7. Operatingrange.................................................................................................5

3. INSTALLATIONWORK............................................................................................... 5

3.1. Installationdimensions.......................................................................................5

3.2. Transportingtheunit..........................................................................................7

3.3. Mountingtheunit................................................................................................7

3.4. Draininstallation.................................................................................................7

3.5. Pipeinstallation..................................................................................................7

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

3.7. Vacuumprocessanddryingprocess.................................................................9

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

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

4. HOWTOOPERATEDISPLAYUNIT......................................................................... 12

4.1. Displayunitposition.........................................................................................12

4.2. Descriptionofdisplayandbutton.....................................................................12

5. FIELDSETTING........................................................................................................12

5.1. Fieldsettingbuttons.........................................................................................12

5.2. Functionsettings..............................................................................................13

6. EXTERNALINPUTANDOUTPUT............................................................................. 14

6.1. Externalinput...................................................................................................14

6.2. Externaloutput.................................................................................................14

6.3. Connectionmethod..........................................................................................14

7. DEMANDCONTROL.................................................................................................15

8. TESTRUN................................................................................................................. 15

8.1. Pre-testruncheckitems..................................................................................15

8.2. Testoperationmethod.....................................................................................15

8.3. Checklist..........................................................................................................16

9. FINISHING.................................................................................................................16

9.1. Installinginsulation...........................................................................................16

9.2. Fillingwithputty................................................................................................16

10. ERRORCODE...........................................................................................................16

10.1.Errordisplaymode...........................................................................................16

10.2.Errorcodechecktable.....................................................................................17

11. PUMPDOWN............................................................................................................ 18

11.1.Preparationforpumpdown..............................................................................18

11.2.Pumpdownprocedure.....................................................................................18

AIRCONDITIONER

OutdoorUnit

INSTALLATION MANUAL

PARTNo.9379069946-02

Forauthorizedservicepersonnelonly.

R32

R32.

9379069946-02_IM.indd 1 7/8/2019 09:45:08

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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ciently

farawayfromthesiteofinstallation,repairing,removinganddisposal,duringwhich

ammablerefrigerantcanpossiblybereleasedtothesurroundingspace.

• Priortoworktakingplace,theareaaroundtheequipmentistobesurveyedtomake

surethattherearenoammablehazardsorignitionrisks.“NoSmoking”signsshall

bedisplayed.

2-6.Ventilatedarea

• Ensurethattheareaisintheopenorthatitisadequatelyventilatedbeforebreaking

intothesystemorconductinganyhotwork.

• Adegreeofventilationshallcontinueduringtheperiodthattheworkiscarriedout.

• Theventilationshouldsafelydisperseanyreleasedrefrigerantandpreferablyexpel

itexternallyintotheatmosphere.

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fol-

lowed.

• Ifindoubtconsultthemanufacturer’stechnicaldepartmentforassistance.

• Thefollowingchecksshallbeappliedtoinstallationsusingammablerefrigerants.

-Thechargesizeisinaccordancewiththeroomsizewithinwhichtherefrigerant

containingpartsareinstalled.

-Theventilationmachineryandoutletsareoperatingadequatelyandarenot

obstructed.

-Ifanindirectrefrigeratingcircuitisbeingused,thesecondarycircuitshallbe

checkedforthepresenceofrefrigerant.

-Markingtotheequipmentcontinuestobevisibleandlegible.Markingsandsigns

thatareillegibleshallbecorrected.

-Refrigerationpipeorcomponentsareinstalledinapositionwheretheyare

unlikelytobeexposedtoanysubstancewhichmaycorroderefrigerantcontain-

ingcomponents,unlessthecomponentsareconstructedofmaterialswhichare

inherentlyresistanttobeingcorrodedoraresuitablyprotectedagainstbeingso

corroded.

2-8.Checkstoelectricaldevices

• Repairandmaintenancetoelectricalcomponentsshallincludeinitialsafetychecks

andcomponentinspectionprocedures.

• Ifafaultexiststhatcouldcompromisesafety,thennoelectricalsupplyshallbecon-

nectedtothecircuituntilitissatisfactorilydealtwith.

• Ifthefaultcannotbecorrectedimmediatelybutitisnecessarytocontinueopera-

tion,anadequatetemporarysolutionshallbeused.

• Thisshallbereportedtotheowneroftheequipmentsoallpartiesareadvised.

• Initialsafetychecksshallinclude.

-Thatcapacitorsaredischarged:thisshallbedoneinasafemannertoavoidpos-

sibilityofsparking.

-Thattherenoliveelectricalcomponentsandwiringareexposedwhilecharging,

recoveringorpurgingthesystem.

-Thatthereiscontinuityofearthbonding.

CAUTION

Fortheairconditionertoworkappropriately,installitaswritteninthismanual.

Thisunit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unitbyfollowinglocalcodesandregulationsinforceintheplaceof

installation,andtheinstructionsprovidedbymanufacturer.

Thisunitispartofasetconstitutinganairconditioner.Theunitmustnotbeinstalled

aloneorbeinstalledwithdevicenotauthorizedbythemanufacturer.

Wheninstallingpipesshorterthan5m,soundoftheoutdoorunitmaybetransferredto

theindoorunit,whichmaycauselargeoperatingorabnormalsound.

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unit.

Toprotectthepersons,earth(ground)theunitcorrectly,andusethepowercable

combinedwithanEarthLeakageCircuitBreaker(ELCB).

Theunitsarenotexplosionproofandthereforeshouldnotbeinstalledinexplosive

atmosphere.

Thisunitcontainsnouser-serviceableparts.Alwaysconsultauthorizedservice

personneltorepairs.

Whenmovingorrelocatingtheairconditioner,consultexperiencedservicetechnicians

fordisconnectionandreinstallationoftheunit.

Childrenshouldbemonitoredtoensuretheydonotplaywiththedevice.

Donottouchthealuminumnsofheatexchangerbuilt-intheindoororoutdoorunitto

avoidpersonalinjurywhenyouinstallormaintaintheunit.

Donotplaceanyotherelectricalproductsorhouseholdbelongingsunderindoorunitor

outdoorunit.Drippingcondensationfromtheunitmightgetthemwet,andmaycause

damageormalfunctionofyourproperty.

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diam-

etertopreventerroneouschargingwithrefrigerantR22andforsafety.Therefore,check

beforehand.[ThechargingportthreaddiameterforR32andR410Ais1/2-20UNF.]

BemorecarefulthanR22sothatforeignmatter(oil,water,etc.)doesnotenterthepiping.

Also,whenstoringthepiping,securelysealtheopeningbypinching,taping,etc.(Han-

dlingofR32issimilartoR410A.)

CAUTION

1.Installation(Space)

• Thattheinstallationofpipe-workshallbekepttoaminimum.

• Thatpipe-workshallbeprotectedfromphysicaldamage.

• Thatcompliancewithnationalgasregulationsshallbeobserved.

• Thatmechanicalconnectionsshallbeaccessibleformaintenancepurposes.

• Incasesthatrequiremechanicalventilation,ventilationopeningsshallbekeptclear

ofobstruction.

• Whendisposingoftheproductisused,bebasedonnationalregulations,properly

processed.

2.Servicing

2-1.Servicepersonnel

• Anypersonwhoisinvolvedwithworkingonorbreakingintoarefrigerantcircuit

shouldholdacurrentvalidcerticatefromanindustry-accreditedassessment

authority,whichauthorizestheircompetencetohandlerefrigerantssafelyinaccord-

ancewithanindustryrecognisedassessmentspecication.

• Servicingshallonlybeperformedasrecommendedbytheequipmentmanufacturer.

Maintenanceandrepairrequiringtheassistanceofotherskilledpersonnelshallbe

carriedoutunderthesupervisionofthepersoncompetentintheuseofammable

refrigerants.

• Servicingshallbeperformedonlyasrecommendedbythemanufacturer.

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3.Repairstosealedcomponents

• Duringrepairstosealedcomponents,allelectricalsuppliesshallbedisconnected

fromtheequipmentbeingworkeduponpriortoanyremovalofsealedcovers,etc.

• Ifitisabsolutelynecessarytohaveanelectricalsupplytoequipmentduringservic-

ing,thenapermanentlyoperatingformofleakdetectionshallbelocatedatthemost

criticalpointtowarnofapotentiallyhazardoussituation.

• Particularattentionshallbepaidtothefollowingtoensurethatbyworkingonelec-

tricalcomponents,thecasingisnotalteredinsuchawaythatthelevelofprotection

isaffected.

• Thisshallincludedamagetocables,excessivenumberofconnections,terminals

notmadetooriginalspecication,damagetoseals,incorrectttingofglands,etc.

• Ensurethatapparatusismountedsecurely.

• Ensurethatsealsorsealingmaterialshavenotdegradedsuchthattheynolonger

servethepurposeofpreventingtheingressofammableatmospheres.

• Replacementpartsshallbeinaccordancewiththemanufacturer’sspecications.

NOTE:Theuseofsiliconsealantmayinhibittheeffectivenessofsometypesofleak

detectionequipment.

Intrinsicallysafecomponentsdonothavetobeisolatedpriortoworkingon

them.

4.Repairtointrinsicallysafecomponents

• Donotapplyanypermanentinductiveorcapacitanceloadstothecircuitwithout

ensuringthatthiswillnotexceedthepermissiblevoltageandcurrentpermittedfor

theequipmentinuse.

• Intrinsicallysafecomponentsaretheonlytypesthatcanbeworkedonwhilelivein

thepresenceofaammableatmosphere.

• Thetestapparatusshallbeatthecorrectrating.

• Replacecomponentsonlywithpartsspeciedbythemanufacturer.

• Otherpartsmayresultintheignitionofrefrigerantintheatmospherefromaleak.

5.Cabling

• Checkthatcablingwillnotbesubjecttowear,corrosion,excessivepressure,vibra-

tion,sharpedgesoranyotheradverseenvironmentaleffects.

• Thecheckshallalsotakeintoaccounttheeffectsofagingorcontinualvibration

fromsourcessuchascompressorsorfans.

6.Detectionofammablerefrigerants

• Undernocircumstancesshallpotentialsourcesofignitionbeusedinthesearching

forordetectionofrefrigerantleaks.

• Ahalidetorch(oranyotherdetectorusinganakedame)shallnotbeused.

7.Leakdetectionmethods

• Electronicleakdetectorsshallbeusedtodetectammablerefrigerants,butthe

sensitivitymaynotbeadequate,ormayneedre-calibration.(Detectionequipment

shallbecalibratedinarefrigerant-freearea.)

• Ensurethatthedetectorisnotapotentialsourceofignitionandissuitableforthe

refrigerantused.

• LeakdetectionequipmentshallbesetatapercentageoftheLFLoftherefrigerant

andshallbecalibratedtotherefrigerantemployedandtheappropriatepercentage

ofgas(25%maximum)isconrmed.

• Leakdetectionuidsaresuitableforusewithmostrefrigerantsbuttheuseof

detergentscontainingchlorineshallbeavoidedasthechlorinemayreactwiththe

refrigerantandcorrodethecopperpipe-work.

• Ifaleakissuspected,allnakedamesshallberemoved/extinguished.

• Ifaleakageofrefrigerantisfoundwhichrequiresbrazing,alloftherefrigerantshall

berecoveredfromthesystem,orisolated(bymeansofshutoffvalves)inapartof

thesystemremotefromtheleak.

Oxygenfreenitrogen(OFN)shallthenbepurgedthroughthesystembothbefore

andduringthebrazingprocess.

8.Removalandevacuation

• Whenbreakingintotherefrigerantcircuittomakerepairs–orforanyother

purpose–conventionalproceduresshallbeused.

However,itisimportantthatbestpracticeisfollowedsinceammabilityisaconsid-

eration.

Thefollowingprocedureshallbeadheredto:

• removerefrigerant

• purgethecircuitwithinertgas

• evacuate

• purgeagainwithinertgas

• openthecircuitbycuttingorbrazing

• Therefrigerantchargeshallberecoveredintothecorrectrecoverycylinders.

• Thesystemshallbe“ushed”withOFNtorendertheunitsafe.

• Thisprocessmayneedtoberepeatedseveraltimes.

• Compressedairoroxygenshallnotbeusedforthistask.

• FlushingshallbeachievedbybreakingthevacuuminthesystemwithOFNand

continuingtolluntiltheworkingpressureisachieved,thenventingtoatmosphere,

andnallypullingdowntoavacuum.

• Thisprocessshallberepeateduntilnorefrigerantiswithinthesystem.

• WhenthenalOFNchargeisused,thesystemshallbeventeddowntoatmos-

phericpressuretoenableworktotakeplace.

• Thisoperationisabsolutelyvitalifbrazingoperationsonthepipeworkaretotake

place.

• Ensurethattheoutletforthevacuumpumpisnotclosetoanyignitionsourcesand

thereisventilationavailable.

9.Chargingprocedures

• Inadditiontoconventionalchargingprocedures,thefollowingrequirementsshallbe

followed.

-Ensurethatcontaminationofdifferentrefrigerantsdoesnotoccurwhenusing

chargingequipment.

-Hosesorlinesshallbeasshortaspossibletominimizetheamountofrefrigerant

containedinthem.

-Cylindersshallbekeptupright.

-Ensurethattherefrigerationsystemisearthedpriortochargingthesystemwith

refrigerant.

-Labelthesystemwhenchargingiscomplete(ifnotalready).

-Extremecareshallbetakennottooverlltherefrigerationsystem.

• PriortorechargingthesystemitshallbepressuretestedwithOFN.

• Thesystemshallbeleaktestedoncompletionofchargingbutpriortocommission-

ing.

• Afollowupleaktestshallbecarriedoutpriortoleavingthesite.

10.Decommissioning

• Beforecarryingoutthisprocedure,itisessentialthatthetechnicianiscompletely

familiarwiththeequipmentandallitsdetails.

• Itisrecommendedgoodpracticethatallrefrigerantsarerecoveredsafely.

• Priortothetaskbeingcarriedout,anoilandrefrigerantsampleshallbetakenin

caseanalysisisrequiredpriortore-useofreclaimedrefrigerant.

• Itisessentialthatelectricalpowerisavailablebeforethetaskiscommenced.

a)Becomefamiliarwiththeequipmentanditsoperation.

b)Isolatesystemelectrically.

c)Beforeattemptingtheprocedureensurethat:

• mechanicalhandlingequipmentisavailable,ifrequired,forhandlingrefriger-

antcylinders;

• allpersonalprotectiveequipmentisavailableandbeingusedcorrectly;

• therecoveryprocessissupervisedatalltimesbyacompetentperson;

• recoveryequipmentandcylindersconformtotheappropriatestandards.

d)Pumpdownrefrigerantsystem,ifpossible.

e)Ifavacuumisnotpossible,makeamanifoldsothatrefrigerantcanberemoved

fromvariouspartsofthesystem.

f)Makesurethatcylinderissituatedonthescalesbeforerecoverytakesplace.

g)Starttherecoverymachineandoperateinaccordancewithmanufacturer’s

instructions.

h)Donotoverllcylinders.(Nomorethan80%volumeliquidcharge).

i)Donotexceedthemaximumworkingpressureofthecylinder,eventemporarily.

j)Whenthecylindershavebeenlledcorrectlyandtheprocesscompleted,make

surethatthecylindersandtheequipmentareremovedfromsitepromptlyand

allisolationvalvesontheequipmentareclosedoff.

k)Recoveredrefrigerantshallnotbechargedintoanotherrefrigerationsystem

unlessithasbeencleanedandchecked.

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.

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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igni-

tion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 Change from R22 to R32(R410A)

Gaugemanifold Pressureishighandcannotbemeasuredwithaconventional

(R22)gauge.Topreventerroneousmixingofotherrefrigerants,

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.

Charging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R410A.

■

Copper pipes

Itisnecessarytouseseamlesscopperpipesanditisdesirablethattheamountofresidual

oilislessthan40mg/10m.Donotusecopperpipeshavingacollapsed,deformedor

discoloredportion(especiallyontheinteriorsurface).Otherwise,theexpansionvalveor

capillarytubemaybecomeblockedwithcontaminants.

AsanairconditionerusingR32(R410A)incurspressurehigherthanwhenusing

conventionalrefrigerant,itisnecessarytochooseadequatematerials.

2.2. Accessories

WARNING

Forinstallationpurposes,besuretousethepartssuppliedbythemanufacturerorother

prescribedparts.Theuseofnon-prescribedpartscancauseseriousaccidentssuchas

theunitfalling,waterleakage,electricshock,orre.

Followinginstallationpartsaresupplied.Usethemasrequired.

Keepthis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

(Maynotbesupplied,dependingon

themodel.)

Draincap

One-touchbush

Forpowersupplycableand

connectioncableinstallation

PartslistfordemandcontrolPCBkit

Name and shape Q’ty Description

Cabletiewithclips

Forxingthesignaltransmission

cable.

Cableties(small)

ForxingtheEMIcoreandthesignal

transmissioncable.

EMIcore

Attachedtothesignaltransmission

cable.

Insulation

ForattachingtheEMIcore.

2.3. Pipe requirements

■

Selecting the pipe material

CAUTION

Donotuseexistingpipes.

Usepipesthathavecleanexternalandinternalsideswithoutanycontaminationwhich

maycausetroubleduringuse,suchassulfur,oxide,dust,cuttingwaste,oil,orwater.

Itisnecessarytouseseamlesscopperpipes.

Material:Phosphordeoxidizedseamlesscopperpipes.

Itisdesirablethattheamountofresidualoilislessthan40mg/10m.

Donotusecopperpipesthathaveacollapsed,deformed,ordiscoloredportion

(especiallyontheinteriorsurface).Otherwise,theexpansionvalveorcapillarytubemay

becomeblockedwithcontaminants.

Improperpipeselectionwilldegradeperformance.Asanairconditionerusing

R32(R410A)incurspressurehigherthanwhenusingconventionalrefrigerant,itis

necessarytochooseadequatematerials.

NOTE:

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]

9.52(3/8) 0.8

15.88(5/8) 1.0

■

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.

Pipediameter<Liquid/Gas>[mm(in.)] 9.52(3/8)/15.88(5/8)

Max.pipinglength(L)[m] 75

Max.heightdifference(H)

<Indoorunittooutdoorunit>[m]

View(Example)

*1:Forthestandardpipediameter.

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2.4. Electrical requirements

CAUTION

Besuretoinstallabreakerwithspeciedcapacity.

Beforetheelectricalworking,conrmelectricalstandardsandregulationsineachcountry,

region,orinstallingplace.Thenselectappropriatecablesandbreakersthatcomplywiththem.

Voltage rating 1Φ240V(50Hz)

Operating range 198to264V

Cable Conductorsize[mm

]

Type Remarks

PowerSupplyCable 2.5-4.0 Type60245IEC66

2Cable+Earth(Ground)

1Φ240V

ConnectionCable 1.5-2.5 Type60245IEC57

3Cable+Earth(Ground)

1Φ240V

Demandcontrol

signaltransmission

cable

0.5-1.5 AS/NZS5000.2

Doubleinsulated

(Max.length:30m)

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:20(A)

Earthleakagebreaker Leakagecurrent:30mA0.1sec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3mminallpolesnearbythe

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

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

•

2.5. Additional charge amount

■

For Pre-charge lengths

Piping length (L) *Pre-Charge [m]

■

If additional refrigerant is required

• WhenthepipingislongerthanPre-chargelength,additionalchargingisnecessary.

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

Additional charging amount

Refrigerant pipe size

[mm (in.)]

Piping length (L)*

~30m

40m 50m 60m 70m 75m g/m

Liquid 9.52(3/8)

None 450g 900g 1350g 1800g 2025g 45g/m

Gas 15.88(5/8)

*Referto“Refrigerantpipesizeandallowablepipinglength”.

Maximum amount of refrigerant charge

4025g(2000g+2025g)

2.6. Optional parts

Parts name Model name

Externalconnectkit

(forExternalinput/output)

UTY-XWZXZ3

2.7. Operating range

Coolingmode

Drymode

Heatingmode

[Reversecyclemodelonly]

Outdoor

temperature

-10to46˚C

-15 to 24 ˚C

• Ifthisunitisoperatedoutsidetheoperatingtemperature,theprotectioncircuitsmaybe

activatedtostoptheunit.

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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.

• Areathathasheatsources,vapors,ortheriskofleakageoraccumulationof

ammablegas.

Donottilttheoutdoorunitmorethan3degrees.

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

control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.

3.1. Installation dimensions

CAUTION

Theinstallationspaceshowninthefollowingexamplesisbasedonanambient

temperatureundercoolingoperationof35°C(DB)attheairintakeoftheoutdoorunit.

Providemorespacearoundtheairintakethanshownintheexamplesiftheambient

temperatureexceeds35°C(DB)orifthethermalloadofalloftheoutdoorunitsexceeds

thecapacity.

Considerthetransportationroute,installationspace,maintenancespace,andaccess,

andinstalltheunitinalocationwithsufcientspacefortherefrigerantpiping.

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CAUTION

Observetheinstallationspacespecicationsthatareshowninthegures.

Providethesamespacefortheairintakeattherearoftheoutdoorunit.

Iftheinstallationisnotperformedaccordingtothespecications,itcouldcauseashort

circuitandresultinalackofoperatingperformance.Asaresult,theoutdoorunitmight

easilybestoppedbyhigh-pressureprotection.

Airintake

Rearview

3.1.1. Outdoor unit installation

When the upper space is open:  (Unit:mm)

(1) Obstaclesattherearonly

150ormore

(2) Obstaclesattherearandsides

200

ormore

300

ormore

200

ormore

(3) Obstaclesatthefrontonly

1,000ormore

(4)Obstaclesatthefrontandrear

1,000ormore

150ormore

When an obstruction in the upper space: (Unit:mm)

(1) Obstaclesattherearandabove

300

ormore

Max.500

1,000

ormore

(2)Obstaclesattherear,sides,andabove

1,000

ormore

200

ormore

250

ormore

500

ormore

Max.500

3.1.2. Multiple outdoor unit installation

• Provideatleast250mmofspacebetweentheoutdoorunitsifmultipleunitsare

installed.

• Whenroutingthepipingfromthesideofanoutdoorunit,providespaceforthepiping.

When the upper space is open: (Unit:mm)

(1) Obstaclesattherearonly

300ormore

250ormore

(2)Obstaclesatthefrontonly

1,500ormore

250ormore

(3)Obstaclesatthefrontandrear

500ormore

1,500ormore

250ormore

When an obstruction in the upper space: (Unit:mm)

(1)Obstaclesatthe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

500ormore

250ormore

Max.300

1,500

ormore

3.1.3. Outdoor units installation in multi-row (Unit:mm)

(1)Singleparallelunitarrangement

500ormore

600ormore

1,500ormore

3,000ormore

(2)Multipleparallelunitarrangement

500ormore

600ormore

1,500ormore

250ormore

3,500ormore

250ormore

1,500ormore

500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.

• Heightabovetheoorlevelshouldbe2in(50mm)ormore.

• Wheninstallingtheoutdoorunit,besuretoopenthefrontandleftsidetoobtainbetter

operationefciency.

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3.2. Transporting the unit

WARNING

Donottouchthens.

Otherwise,personalinjurycouldresult.

CAUTION

Whencarryingtheunit,holdthehandlesontherightandleftsidesandbecareful.

Iftheoutdoorunitiscarriedfromthebottom,handsorngersmaybepinched.

• Besuretoholdthehandlesonthesidesoftheunit.Otherwise,thesuctiongrilleson

thesidesoftheunitmaybedeformed.

Handle

3.3. Mounting the unit

(Unit:mm)

166

AIR

650

154

50 50

410

• Install4anchorboltsatthelocationsindicatedwitharrowsintheabove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below.)

• Ifoverturningpreventionisrequired,purchasethenecessarycommerciallyavailable

items.

Bolt

20mm

Nut

Base

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

nutandwasher.)

•Donotinstalldirectlyontheground,thismayresultinequipmentfailure.

•Thedrainwaterisdischargedfromthebottomoftheequipment.Constructadrainditch

aroundthebaseanddischargethedrainwaterproperly.

•Provideamplespaceforicebuildupfromcondensatebetweenthebottomoftheunitand

theflatsurfaceonwhichitismounted.Otherwise,thereisriskthatthedrainagewater

willfreezebetweenthedeviceandthesurface,disablingdrainage.

50mmormore

CAUTION

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.

3.4. 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)

• Ifyouareinstallingthedrainpipe,pleaseprovide

aworkingspaceunderthebaseoftheoutdoorunit.

• As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)

 (Unit:mm)

341

305

227

438

622

Draincapmountinghole×2

Drainpipemounting

hole×1

AIR

3.5. Pipe installation

3.5.1. Opening a knock out hole

CAUTION

Becarefulnottodeformorscratchthepanelwhileopeningtheknockoutholes.

Toprotectthepipinginsulationafteropeningaknockouthole,removeanyburrsfrom

theedgeofthehole.Itisrecommendedtoapplyrustpreventionpainttotheedgeofthe

hole.

• Pipescanbeconnectedfrom4directions,front,lateralside,rearsideandbottom.

(Fig.A)

• Whenconnectingatthebottom,removetheservicecoverandpipingcoveronthe

frontoftheoutdoorunit,andopentheknockoutholeprovidedatthebottomcornerof

thepipingoutlet.

• Itcanbeinstalledasshownon“Fig.B”cuttingoutthe2slitsasindicatedon“Fig.C”.

(Whencuttingslits,useasteelsaw.)

Fig. A

Servicecover

Front

connection

Bottom

connection

Lateral

connection

Rear

connection

Baseoftheoutdoorunit

Drainpipe

Drainpipemountinghole

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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over.

(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.

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Connection pipes

CAUTION

Besuretoinstallthepipeagainsttheportontheindoorunitandtheoutdoorunit

correctly.Ifthecentring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) Servicecoverremoval

 • Removethetwomountingscrews.

 • Removetheservicecoverbypushingdownwards.

Servicecover

Directionoftheservice

coverremoval

(2) Installtheoutdoorunitwallcap(suppliedwiththeoptionalinstallationsetorprocured

intheeld)tothewallholepipe.

(3) Connecttheoutdoorunitandindoorunitpiping.

(4) Aftermatchingthecentreofthearesurfaceandtighteningthenuthandtight,tighten

thenuttothespeciedtighteningtorquewithatorquewrench.

3-wayvalve(Liquid)

3-wayvalve(Gas)

Flarenut

Connectionpipe

(Liquid)

Flarenut

Connectionpipe

(Gas)

90°

Flarenut

Torque

wrench

Holding

wrench

Torquewrench

Topreventgasleakage,coatthe

aresurfacewithrefrigeratoroil.

Flare nut tightening torque

Flare nut Tightening torque

6.35mm(1/4in.)dia. 16to18N·m(160to180kgf·cm)

9.52mm(3/8in.)dia. 32to42N·m(320to420kgf·cm)

12.70mm(1/2in.)dia. 49to61N·m(490to610kgf·cm)

15.88mm(5/8in.)dia. 63to75N·m(630to750kgf·cm)

Fig. B Fig. C

Bottom

connection

Slit

3.5.2. Brazing

CAUTION

Ifairoranothertypeofrefrigerantenterstherefrigerationcycle,theinternalpressurein

therefrigerationcyclewillbecomeabnormallyhighandpreventtheunitfromexertingits

fullperformance.

Applynitrogengaswhilebrazingthepipes.Ifapipeisbrazedwithoutapplyingnitrogen

gas,anoxidationlmwillbecreated.

Thiscandegradeperformanceordamagethe

partsintheunit(suchasthecompressoror

valves).

Pressureregulatingvalve

Cap

Brazingarea

Nitrogengas

Nitrogengaspressure:0.02MPa

(=pressurefeltsufcientlyon

thebackofthehand)

Forbrazingmaterial,usephosphorcopperthatdoesnotrequireux.Donotuseuxto

brazepipes.Iftheuxisthechlorinetype,itwillcausethepipestocorrode.

Furthermore,iftheuxcontainsuoride,itwilladverselyaffecttherefrigerantpipe

systemsuchasbydegradingtherefrigerant.

Ifuorideiscontained,qualityofrefrigerantdeterioratesandaffectstherefrigerant

pipingsystem.

Ventilatetheareaappropriatelywhenbrazing,topreventrespread.

Whenbrazing,makesurethatthereisnohazardousorinammableobjectsinthe

surroundingareatoavoidriskofre.

3.5.3. Flare connection (pipe connection)

CAUTION

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

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

■

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 flare nut(always use theflare 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9.52mm(3/8") 0to0.5 1.0to1.5 1.5to2.0

ø15.88mm(5/8") 0to0.5 1.0to1.5 1.5to2.0

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Donotremovethecapfromtheconnectionpipebeforeconnectingthepipe.



CAUTION

Fastenaarenutwithatorquewrenchasinstructedinthismanual.Iffastenedtoo

tight,thearenutmaybebrokenafteralongperiodoftimeandcausealeakageof

refrigerant.

Duringinstallation,makesurethattherefrigerantpipeisattachedrmlybeforeyourun

thecompressor.Donotoperatethecompressorundertheconditionofrefrigerantpiping

notattachedproperlywith3-wayvalvesopen.Thismaycauseabnormalpressureinthe

refrigerationcyclethatleadstobreakageandeveninjury.

3.5.4. Handling precautions for the valves

• MountedpartofBlankcapissealedforprotection.

• Fastenblankcaptightlyafteropeningvalves.

Table A

Blank cap

[mm (in.)]

Tightening torque

[N·m (kgf·cm)]

6.35(1/4) 20to25(200to250)

9.52(3/8) 20to25(200to250)

12.70(1/2) 25to30(250to300)

15.88(5/8) 30to35(300to350)

19.05(3/4) 35to40(350to400)

Operating the valves

• Useahexagonwrench(size4mm).

• Opening (1) Insertthehexagonwrenchintothevalveshaft,andturnit

  counterclockwise.

 (2) Stopturningwhenthevalveshaftcannolongerbeturned.

  (Openposition)

• Closing (1) Insertthehexagonwrenchintothevalveshaft,andturnitclockwise.

 (2) Stopturningwhenthevalveshaftcannolongerbeturned.

  (Closedposition)

Openingdirection

Hexagonwrench

Seal(blankcap

installationportion)

Liquidpipe

Gaspipe

Openingdirection

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.

3.7. Vacuum process and drying process

CAUTION

Performarefrigerantleakagetest(airtightnesstest)tocheckforleaksusingnitrogen

gaswhileallvalvesintheoutdoorunitareclosed.(Usethetestpressureindicatedon

thenameplate.)

Besuretoevacuatetherefrigerantsystemusingavacuumpump.

Therefrigerantpressuremaysometimesnotrisewhenaclosedvalveisopenedafter

thesystemisevacuatedusingavacuumpump.Thisiscausedbytheclosureofthe

refrigerantsystemoftheoutdoorunitbytheelectronicexpansionvalve.Thiswillnot

affecttheoperationoftheunit.

Ifthesystemisnotevacuatedsufciently,itsperformancewilldrop.

Useacleangaugemanifoldandcharginghosethatweredesignedspecicallyforuse

withR32(R410A).Usingthesamevacuumequipmentfordifferentrefrigerantsmay

damagethevacuumpumportheunit.

Donotpurgetheairwithrefrigerants,butuseavacuumpumptoevacuatethesystem.

Always use a vacuum pump to purge the air.

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

(1) Checkthatthevalvesareclosedbyremovingtheblankcapsfromthegasandliquid

pipes.

(2) Removethecap,andconnectthegaugemanifold and the vacuum pump to the

chargingvalvebytheservicehoses.

(3) Vacuumtheindoorunitandtheconnectingpipesuntilthepressuregaugeindicates

-0.1MPa(-76cmHg).[Forvacuumgauge:65Pa(500microns)]

(4) When -0.1 MPa (-76 cmHg)[For vacuumgauge: 65 Pa (500 microns)] is reached,

operatethevacuumpumpforatleast60minutes.

(5) Disconnect the servicehoses and tthe cap tothe charging valveto the specied

torque.

(6) 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)].

(7) Tightentheblankcapsofthe3-wayvalvetothespeciedtorque.

Tightening torque

Blank cap

9.52mm(3/8in.) 20to25N·m(200to250kgf·cm)

15.88mm(5/8in.) 30to35N·m(300to350kgf·cm)

Charging port cap 10to12N·m(100to120kgf·cm)

Servicehose

Servicehosewithvalvecore

Chargingport

Blankcap

Hexagonwrench

Connectingpipe

Gaugemanifold

Vacuumpump

Chargingportcap

3-wayvalve

Usea4mm

hexagon

wrench

CAUTION

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

leaks.

Use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insulationaroundtherefrigerantpiping.Iftheexpected

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

humiditylevelexceeds80%,useinsulationthatis20mmorthicker.

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

surfaceoftheinsulation.

Inaddition,useinsulationwithheatconductivityof0.045W/(m·K)orless(at20°C).

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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.

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220-240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.

Useadedicatedpowersupplycircuit.Insufcientpowercapacityintheelectricalcircuit

orimproperwiringmaycauseelectricshockorre.

Installabreakeratthepowersupplyforeachoutdoorunit.Improperbreakerselection

cancauseelectricshockorre.

Installaleakagecircuitbreakerinaccordancewiththerelatedlawsandregulations.An

improperlyinstalledelectricalboxcovercancauseseriousaccidentssuchaselectric

shockorrethroughexposuretodustorwater.

Acircuitbreakerisinstalledinthepermanentwiring.Alwaysuseacircuitthatcantrip

allthepolesofthewiringandhasanisolationdistanceofatleast3mmbetweenthe

contactsofeachpole.

Usedesignatedcablesandpowercables.Improperusemaycauseelectricshockorre

bypoorconnection,insufcientinsulation,orovercurrent.

Donotmodifypowercable,useextensioncableorbranchwiring.Improperusemay

causeelectricshockorrebypoorconnection,insufcientinsulationorovercurrent.

Connecttheconnectorcablesecurelytotheterminal.Checknomechanicalforcebears

onthecablesconnectedtotheterminals.Faultyinstallationcancauseare.

Useringterminalsandtightentheterminalscrewstothespeciedtorques,otherwise,

abnormaloverheatingmaybeproducedandpossiblycauseseriousdamageinsidethe

unit.

Makesuretosecuretheinsulationportionoftheconnectorcablewiththecableclamp.

Damagedinsulationcancauseashortcircuit.

Fixcablessothatcablesdonotmakecontactwiththepipes(especiallyonhigh

pressureside).Donotmakepowersupplycableandtransmissioncablecomein

contactwithvalves(Gas).

Neverinstallapowerfactorimprovementcondenser.Insteadofimprovingthepower

factor,thecondensermayoverheat.

Besuretoperformtheearthing(grounding)work.

Donotconnectearthing(grounding)wirestoagaspipe,waterpipe,lightningrodor

earthing(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earthing(grounding)methodifPVC

pipeisused.

• Connectiontotheearthing(grounding)wireofatelephoneortoalightningrodmay

causeadangerouslyabnormalriseintheelectricalpotentialiflightningstrikes.

Improperearthing(grounding)workcancauseelectricshocks.

Securelyinstalltheelectricalboxcoverontheunit.Animproperlyinstalledservicecover

cancauseseriousaccidentssuchaselectricshockorrethroughexposuretodustor

water.

CAUTION

Theprimarypowersupplycapacityisfortheairconditioneritself,anddoesnotinclude

theconcurrentuseofotherdevices.

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.

Transmissioncablebetweenindoorunitandoutdoorunitis240V.

Besurenottoremovethermistorsensoretc.frompowerwiringandconnectionwiring.

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

Startwiringworkafterclosingbranchswitchandovercurrentbreaker.

Useanearthleakagebreakerthatiscapableofhandlinghighfrequencies.Becausethe

outdoorunitisinvertercontrolled,ahigh-frequencyearthleakagebreakerisnecessary

topreventamalfunctionofthebreakeritself.

Whenusinganearthleakagebreakerthathasbeendesignedsolelyforearth(ground)

faultprotection,besuretoinstallafuse-equippedswitchorcircuitbreaker.

DonotconnecttheACpowersupplytothetransmissionlineterminalboard.Improper

wiringcandamagetheentiresystem.

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.

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.

3.9.1. 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)

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3.9.2. Knock out holes for wiring

CAUTION

Becarefulnottodeformorscratchthecoverwhileopeningtheknockoutholes.

Whencablesareroutedfromtheunit,aprotectionsleevefortheconduitscanbe

insertedattheknockouthole.

Ifyoudonotuseawireconduit,besuretoprotectthewirestopreventtheedgeofthe

knockoutholefromcuttingthewires.

Itisrecommendedtoapplyanti-rustpainttotheedgeoftheknockouthole.

Installation method of One-touch bush

PleasextheOne-touchbush(accessory)asshowninthegurebelow.

(Pipecoverrear)

(Pipecoverfront)

One-touchbush

(Accessories)

One-touchbush

(Accessories)

Frontconnection

Lateralconnection

Rearconnection

3.9.3. Wiring method

■

Connection diagrams

EARTH

(GROUND)

POWERSUPPLY

Indoorunit

sideterminal

Outdoorunit

sideterminal

(GROUND)

EARTH

EARTH

(GROUND)

Earthing(Grounding)line

Powerline

Controlline

■

Connection cable preparation

Keeptheearth(ground)wirelongerthantheotherwires.

Earth(Ground)wire

30mm

Powersupplycableor

Transmissioncable

35mmormore

■

Wiring procedure

(1) •Removethetwomountingscrews.

 •Removetheservicecoverbypushingdownwards.

Servicecover

Directionofthe

servicecover

removal

(2) Connectthepowersupplycableandtheconnectioncabletoterminal.

(3) Fastenthepowersupplycableandconnectioncablewithcableclamp.

NL321

Terminalblocks

Firmlysecure

cableclampso

wireterminations

willnotreceive

externalstress.

Usethespecied

wiretypeand

connectitsecurely.

Cableclamp

Controlbox

Connectioncable

Powersupplycable

Indoor

unit

Terminalblocks

EARTH

(4) Securethecablesusingthecabletieundertheterminalblocks,andthensecurethe

cablesusingthecabletieattachedtothebaseofthevalves.

Cabletie

(5) Puttheservicecoverbackaftercompletionofthework.

Servicecover

Directionofthe

servicecover

removal

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4. HOW TO OPERATE DISPLAY UNIT

4.1. Display unit position

WARNING

Nevertouchelectricalcomponentssuchastheterminalblocksexceptthebuttonon

thedisplayboard.Itmaycauseaseriousaccidentsuchaselectricshock.

CAUTION

Oncerefrigerantchargingiscompleted,besuretoopenthevalvepriorto

performingtheeldsetting.Otherwise,thecompressormayfail.

Dischargeanystaticelectricityfromyourbodybeforetouchingthepushbuttons.

Nevertouchanyterminalorpatternofanypartsonthecontrolboard.

• Thepositionsofthebuttonsontheoutdoorunitcontrolboardareshowninthegure

below.

• Varioussettingscanbeadjustedbychangingpushbuttonsontheboardoftheoutdoor

unit.

Push

button

LEDdisplay

Invertercover

• TheprintedcharactersfortheLEDdisplayareshownbelow.

6:

6:

6: 6: 6:











LEDdisplaypart

Buttonpart

4.2. Description of display and button

Display lamp Function or operation method

(1)POWER/MODE Green

Lightsonwhilepoweron.Fieldsettingin

outdoorunitorerrorcodeisdisplayedwith

blink.

(2)ERROR Red

Blinksduringabnormalairconditioner

operation.

(3)PUMPDOWN

(L1)

Orange Lightsonduringpumpdownoperation.

(4)LOWNOISE

MODE

(L2,L3)

Orange

Lightsonduring“Lownoise”functionwhen

eldsettingisactivated.(LightingpatternofL2

andL3indicateslownoiselevel)

*Referto“5.2.Functionsettings”.

(5)PEAKCUT

(L4,L5,L6)

Orange

Lightsonduring“Peakcut”functionwheneld

settingisactivated.(LightingpatternofL4,L5

andL6indicatespeakcutlevel)

*Referto“5.2.Functionsettings”.

Button Function or operation method

SW1 MODE

Toswitchbetween“Fieldsetting”and“Errorcode

display”.

SW2 SELECT

Toswitchbetweentheindividual“Fieldsetting”and

the“Errorcodedisplays”.

SW3 ENTER

Toxtheindividual“Localsettings”andthe“Error

codedisplays”.

SW4 EXIT Toreturnto“Operationstatusdisplays”.

SW5 PUMPDOWN Tostartthepumpdownoperation.

5. FIELD SETTING

CAUTION

Dischargethestaticelectricityfromyourbodybeforesettinguptheswitches.

Nevertouchtheterminalsorthepatternsonthepartsthataremountedonthe

board.

Wall mounted model cannot use this function.

5.1. Field setting buttons

• Removetheservicecoveroftheoutdoorunitaccesstheprintcircuitboardofthe

displayunit.

Printcircuitboard

button

sforvarioussettingsandLEDdisplaysareshowninthe

gure.

6:

6:

6: 6: 6:











LEDdisplaypart

Buttonpart

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5.2. Function settings

• Variousfunctionscanbeset.Followthesettingmethoddescribedin5.2.1.tosetaspertherequirement.

Performthesesettingsaftertheindoorunitstops.

Table.SettingsList

No SettingItem

LEDdisplay

Factory

setting

Content

POWER/

MODE

ERROR

PUMP

DOWN

LOWNOISE PEAKCUT

(L1) (L2) (L3) (L4) (L5) (L6)

Lownoise

modesetting

Level1

Blink

(9times)

○ ○ ○

●

○ ○

●

○

Thenoiselevelwhenoperatinginthelownoise

modecanbeset.Theoperationselectioncan

bedonebyexternalinputterminal(CN10).

Cooling/heatingperformancedecreasesby

loweringoperationnoiselevel.

Level2

Blink

(9times)

○ ○ ○

●

○

●

○

Peakcut

modesetting

Level1

Blink

(9times)

○ ○

●

○ ○ ○

●

Thecapacitylimitcanbeselectedwhen

operatingwiththe“PeakCutmode”.

Theoperationselectioncanbedoneby

externalinputterminal(CN11).

Thelowerthelevel,themoretheeffect

ofenergysaving,butthecooling/heating

performancedecreases.

Level2

Blink

(9times)

○ ○

●

○ ○

●

○

Level3

Blink

(9times)

○ ○

●

○ ○

● ●

Level4

Blink

(9times)

○ ○

●

○

●

○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

5.2.2. Setting for peak cut mode

(1)

Switchto“Fieldsettingmode”bypressing[MODE]button(SW1)for3secondsormore.

(2) Conrm(POWER/MODE)blinks9times,andpress

[

ENTER]button(SW3).

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

Blink

(9times)

○ ○ ○ ○ ○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson,():Numberofblinking

(3) Press

[

SELECT]button(SW2),andadjustLEDlampasshownbelow.(Current

settingisdisplayed)

LOW

NOISE

(L2) (L3)

PEAKCUT

MODE

Blink

○

Sign“

○

”:Lightsoff

(4) Press

[

ENTER]button(SW3).

LOW

NOISE

(L2) (L3)

PEAKCUT

MODE

●

○

Sign“

○

”:Lightsoff,“

●

”:Lightson

(5) Press

[

SELECT]button(SW2),andadjustLEDlampasshowninbelowgure.

PEAK

CUT

(L4) (L5) (L6)

Level1 0%ofratedinputratio

○ ○

Blink

Level2 50%ofratedinputratio

○

Blink

○

Level3 75%ofratedinputratio

○

Blink Blink

Level4 100%ofratedinputratio Blink

○ ○

Sign“

○

”:Lightsoff

(6) Press[ENTER]button(SW3)andxit.

PEAK

CUT

(L4) (L5) (L6)

Level1 0%ofratedinputratio

○ ○

●

Level2 50%ofratedinputratio

○

●

○

Level3 75%ofratedinputratio

○

● ●

Level4 100%ofratedinputratio

●

○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

(7) Returnto“Operatingstatusdisplay(normaloperation)”bypressing[EXIT]button

(SW4).

• Whenpressednumberislostduringoperation,restartfromthebeginningofoperation

procedureafterreturningto“Operationstatusdisplay(normaloperation)”bypressing

[EXIT]buttononce.

5.2.1. Setting for low noise mode

(1) Switchto“Fieldsettingmode”bypressing[MODE]button(SW1)for3secondsor

more.

(2) Conrm(POWER/MODE)blinks9times,andpress[ENTER]button(SW3).

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

Blink

(9times)

○ ○ ○ ○ ○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson,():Numberofblinking

(3) Press[SELECT]button(SW2),andadjustLEDdisplayasshownbelow.(Current

settingisdisplayed)

LOW

NOISE

(L2) (L3)

LOWNOISE

MODE

○

Blink

Sign“

○

”:Lightsoff

(4) Press[ENTER]button(SW3).

LOW

NOISE

(L2) (L3)

LOWNOISE

MODE

○

●

Sign“

○

”:Lightsoff,“

●

”:Lightson

(5) Press[SELECT]button(SW2),andadjustLEDlampasshowninbelowgure.

PEAK

CUT

(L4) (L5) (L6)

Level1

○ ○

Blink

Level2

○

Blink

○

Sign“

○

”:Lightsoff

ThenoiseofLevel2islowerthantheoneofLevel1.

(6) Press[ENTER]button(SW3)andxit.

PEAK

CUT

(L4) (L5) (L6)

Level1

○ ○

●

Level2

○

●

○

Sign“

○

”:Lightsoff,“

●

”:Lightson

(7)Returnto“Operatingstatusdisplay(normaloperation)”bypressing[EXIT]button

(SW4).

• Incaseofmissinghowmanytimes[SELECT]and[ENTER]buttonsarepressed,

restartfromthebeginningofoperationprocedureafterreturningto“Operationstatus

display(normaloperation)”bypressing[EXIT]buttononce.

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6. EXTERNAL INPUT AND OUTPUT

Wall mounted model cannot be used this function.

6.1. External input

6.1.1. Wiring of connector

ON/OFFofthe“Lownoisemode”,and“Peakcutmode”functionscanbeenabledwithan

externalelddevice.

Wheninstallingconnectioncable,speciedpart(optionalparts)mustbeused.

Refertosection5.2.Table.SettingsList,fortherequiredfunction.Thefunctionmustbe

setfortheexternalinputtowork.

Input ConnectorNo. Optionalparts

Lownoisemode CN10 Externalconnectkit

Peakcutmode CN11 Externalconnectkit

*MakethedistancefromthePCboardtotheconnectedunitwithin10m(33ft).

•Contactcapacity:24VDCormore,10mAormore.

CN10

CN11

Circuitdiagramexample

Outdoorunitcontrol

PCboard

Connectedunit

(Fieldsupply)

Ex.)Switch

Connectioncable(option)

Signal

Connector

*10m(33ft)

■

Low noise mode (CN10)

•Thisfeaturesreducestheoperatingsoundoftheoutdoorunitfromthenormal

sound.Theairconditionerissettothe“Lownoisemode”whenclosingthecontact

inputofacommercialtimerorON/OFFswitchtoaconnectorontheoutdoorcontrol

PCboard.

*Performancemaydropdependingontheoutsideairtemperaturecondition,etc.

*Setthe“Lownoisemode”level,referto“5.2.Functionsettings”.

InputSignal···ON:Lownoisemode

···OFF:Normaloperation

InputSignal

Lownoisemode

OFF

■

Peak cut mode (CN11)

•Operationthatsuppressedthecurrentvaluecanbeperformedbymeansofthe

connectedunit.TheairconditionerissettothePeakcutmodebyapplyingthe

contactinputofacommercialON/OFFswitchtoaconnectorontheoutdoorcontrol

PCboard.

*Setthe“Peakcutmode”level,referto“5.2.Functionsettings”.

InputSignal···ON:Peakcutmode

···OFF:Normaloperation

InputSignal

Peakcutmode

OFF

6.2. External output

6.2.1. Wiring of connector

Wheninstallingconnectioncable,speciedpart(optionalparts)mustbeused.

Output ConnectorNo. Optionalparts

Errorstatus CN12 Externalconnectkit

Compressorstatus CN13 Externalconnectkit

*MakethedistancefromthePCboardtotheconnectedunitwithin10m(33ft).

1)Powersupply

•Voltage(Chartsign=Vcc):DC24Vorless

2)Load

•Load:DC500mAorless

Vcc

CN12

CN13

Circuitdiagramexample

Outdoorunitcontrol

PCboard

Connectedunit

(Fieldsupply)

Connection

cable(option)

Signal

*10m(33ft)

Connector

Load

Power

supply

■

Error status output (CN12)

Anairconditionererrorstatussignalisproducedwhenamalfunctionoccurs.

Errorstatus

Outputsignal

Error

Normal

OFF

■

Compressor status output (CN13)

Compressoroperationstatussignalisproducedwhenthecompressorisrunning.

Compressorstatus

Outputsignal

Operation

Stop

OFF

6.3. Connection method

CAUTION

Donotroutetheconnectioncableoverlappingwiththepowersupplycable.

RemovetheInvertercoverbeforework.

CN13(Blue)

CN12(Black)

CN10(Yellow)

CN11(Green)

Fixtheconnectioncablewithotherwires.

Lettheconnectioncablepassintheknockouthole.

Toprotectthewiringafteropeningaknockouthole,

removeanyburrsfromedgeofthehole.

BesuretoinstalltheInvertercoverafterthewiring

complete.

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7. DEMAND CONTROL

WARNING

• 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.

• Ensurethatanyelectricalinstallationiscompletedbyaqualiedperson.

• EnsuretheelectricalinstallationisinstalledinaccordancewithAS/NZS3000.

(1)Removetheservicecoveroftheoutdoor

unit.

(2)Removetheinvertercoverofthemain

unitboard.

Invertercover

Servicecover

CAUTION

DonotdirectlypressorapplyanypressuretothedemandcontrolPCB.

Applicationofpressuremaycausedamageorfaultoftheboard.

(4)FixtheEMIcoretothesignal

transmissioncablewiththecabletie

(small).

(5)AttachtheInsulationtotheEMI

core.

(6)Fixthesignaltransmissioncable

withthecableclip.

Donotroutethesignaltransmission

cableoverlappingwiththepower

supplycable.Thenwirethecableto

theoutsideoftheoutdoorunit.

(7)Afteryoucompletethewiring,

reinstalltheprotectivecoverandthe

servicecoverrmly.

(3)Connectthesignaltransmissioncable(eld-supplied)

tothedemandcontrolsignalterminalblock.

NOTE:Conrmthateachwiresofthesignaltransmission

cablearermlyconnectedtocorresponding

terminaloftheterminalblock.

1 2 3 C

1:DRM1

2:DRM2

3:DRM3

C:COMMON

(mm)

Signaltransmissioncable

Attachtheone-touchbushtothe

knockouthole.

㻝㻞㻟㻯

30-35

(mm)

Cabletie

(small)

CAUTION

Routethesignaltransmissioncableawayfromthepowersupplycable.

Adjacentwiringofthosecablesmayleadtheproductmalfunctionscausedbygenerated

noise.

• Whentestingtheoperationofthedemandcontrolmodes,pleaseensuretheair

conditioneranddemandcontrolPCBhasbeeninstalledinaccordancewiththe

providedinstallationmanuals.

• EnquirieswhentestingtheoperationofthedemandcontrolPCB,ConsultFujitsu

CustomerServiceandyourenergyproviderifyouhaveanyoperationalissuesor

errorsarecaused.

8. TEST RUN

8.1. Pre-test run check items

Beforethetestoperation,refertothegureandcheckthefollowingitems.

Istheoutdoorunitsecurelyinstalled?

Haveyouperformedgasleakageinspection?

(Connectionjointsofvariouspipes(angeconnection,brazing))

Istheheatinsulationdonecompletely?

(Gaspipe,liquidpipe,drainhoseextensiononindoorunitside,etc.)

Isthewaterdischargingfromdrainwithoutanyproblems?

Arethecablesconnectedcorrectly?

Arethecablesasperspecications?

Istheearthwireconnectedaccurately?

Arethereanyobstaclesblockingthesuctiongate,andoutletof

theindoor/outdoorunits?

Haveyoulledthespeciedamountofrefrigerant?

Arethestopvalvesofgaspipeandliquidpipefullyopen?

Hasthepowerbeensuppliedtocrankcaseheaterformorethan6hours?

  Aftercheckingthattheaboveitemsareallinorder,refer

to“8.2.Testoperationmethod”totestoperationtheunit.

Ifthereareproblems,adjustimmediatelyandrecheck.



8.2. Test operation method

Besuretoconguretestrunsettingsonlywhentheoutdoorunithasstopped

operating.

Testoperationsettingmethod(Itcanbeperformedinthefollowingtwoways)

• Setwithtestoperationsetting(refertoinstallationinstructionsmanualofindoorunit

forfurtherdetails)availableintheremotecontroller.

• “CoolingOperation”and“HeatingOperation”canbeset,using[SELECT]buttonand

[ENTER]buttonavailableontheboardofdisplayunit.

(*Makesuretoperformthersttestoperationwithcoolingoperation.)

Setaspertheproceduregivenbelow.

6:

6:

6: 6: 6:











LEDdisplaypart

Buttonpart

• Dependingonthecommunicationstatusbetweentheindoorandoutdoorunits,

itmaytakeseveralminutesforthesystemtostartoperatingaftersettingsforthe

testrunarecomplete.

• Afterthetestrunsettingsarecomplete,theoutdoorunitsandtheconnected

indoorunitswillstartoperating.Roomtemperaturecontrolwillnotactivateduring

testoperation(continuousoperation).

• Ifaknockingsoundcanbeheardintheliquidcompressionofthecompressor,

stoptheunitimmediatelyandthenenergizethecrankcaseheaterforasufcient

lengthoftimebeforerestartingtheoperation.

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■

Setting method on outdoor unit board

(1) Turnonthepoweroftheoutdoorunitandenterstandbymode.

“POWER/MODE”Lamplightsup.

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

●

○ ○ ○ ○ ○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

(2) Press[ENTER]buttonformorethan3seconds.

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

Blink

○ ○ ○

Blink

○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

(3) Press[SELECT]button,LEDofthetestrunmodeswitchedbetween“COOL”and

“HEAT”.

Coolingtestmode

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

Blink

○ ○ ○

Blink

○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

Heatingtestmode

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

Blink

○ ○

Blink

○ ○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

(4) Afterconrmingtheoperationmode,press[ENTER]button.

Thedisplaychangesasfollows,andairconditionerstartsoperation.

Coolingtestmode

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

Blink

○ ○ ○

●

○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

Heatingtestmode

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

Blink

○ ○

●

○ ○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

(5) Press[ENTER]button.

Airconditionerstoppedoperation.

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

●

○ ○ ○ ○ ○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

8.3. Check list

Checkitemsduringtestoperation.

Istheoutdoorunitmakinganyabnormalnoiseorvibratingsignicantly?

Isthecoldairorhotairblowingfromindoorunitaccordingtotheoperation

mode?

Checkthatthe“ERROR”LEDblinks.

Ifithasdisplayed,checktheerrorcontentasper10.2.describedlater.

Operatetheunitaccordingtotheoperatingmanualprovidedwiththeindoor

unit,andcheckthatitisoperatingnormally.

9. FINISHING



WARNING

Installtheinsulatedpipessothattheydonottouchthecompressor.

9.1. 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

9.52(3/8) 9 11 14 18

15.88(5/8) 10 12 16 20

Iftheambienttemperatureandrelativehumidityexceed32°C,increasethelevelofheat

insulationfortherefrigerantpipes.

9.2. Filling with putty

WARNING

Fillthepipingholesandwiringholeswithputty(suppliedlocally)toavoidanygap

(FigA).Ifsmallanimalssuchasinsectsentertheexternalunit,ashortcircuitmaybe

causednearelectricalcomponentsintheservicecover.

• Iftheoutdoorunitisinstalledatalevelthatishigherthantheindoorunit,thewater

thathascondensedinthe3-wayvalveoftheoutdoorunitcouldtraveltotheindoor

unit.Therefore,useputtyinthespacebetweenthepipeandtheinsulationtoprevent

theentryofwatertotheindoorunits.



 Fig.A

Putty

Insulation

10. ERROR CODE

YoucandeterminetheoperatingstatusbythelightingupandblinkingoftheLEDlamp.

6:

6:

6: 6: 6:











LEDdisplaypart

Buttonpart

10.1. Error display mode

Displaywhenanerroroccurs.

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

●

Blink

(Hispeed)

○ ○ ○ ○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

(1) Checkthatthe“ERROR”LEDblinks,thenpress[ENTER]buttononce.

(2) Fordetails,refertothefollowingtable.

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10.2. Error code check table

LEDdisplay

DESCRIPTION REMARK

POWER/

MODE

ERROR

PUMP

DOWN

LOWNOISE PEAKCUT

(L1) (L2) (L3) (L4) (L5) (L6)

(2)

●

(1) (1)

○ ○

● ●

Serialcommunicationerror

Serialforwardtransmissionerrorimmediatelyafter

operation

(2)

●

(1) (1)

○

●

○ ○

Serialforwardtransmissionerrorduringoperation

(2)

●

(2) (2)

○ ○ ○

●

Indoorunitcapacityerror Indoorunitcapacityerror

(2)

●

(2) (3)

○ ○ ○

●

Combinationerror Differenttypeofrefrigerant

(2)

●

(5) (15)

○ ○ ○

●

Indooruniterror Indooruniterror

(2)

●

(6) (2)

○ ○ ○

●

OutdoorunitmainPCBerror OutdoorunitPCBmodelinformationerror

(2)

●

(6) (3)

○ ○ ○

●

InverterPCBerror Invertererror

(2)

●

(6) (5)

○ ○

● ●

IPMerror TripterminalLerror

(2)

●

(7) (1)

○ ○ ○

●

Dischargetemp.sensorerror Dischargetemp.sensor1error

(2)

●

(7) (2)

○ ○ ○

●

Compressortemp.sensorerror Compressortemp.sensor1error

(2)

●

(7) (3)

○ ○

●

○

OutdoorunitHeatEx.sensorerror

HeatEx.middletemp.sensorerror

(2)

●

(7) (3)

○ ○

● ●

OutdoorunitHeatEx.liquidtemp.sensorerror

(2)

●

(7) (4)

○ ○ ○

●

Outdoortemp.sensorerror Outdoortemp.sensorerror

(2)

●

(7) (7)

○ ○ ○

●

Heatsinktemp.sensorerror Heatsinktemp.sensorerror

(2)

●

(8) (4)

○ ○ ○

●

Currentsensorerror Currentsensor1error(stoppagepermanently)

(2)

●

(8) (6)

○

●

○ ○

Pressuresensorerror

Highpressureswitch1error

(2)

●

(8) (6)

○

● ●

○

Pressuresensorerror

(2)

●

(9) (4)

○ ○ ○

●

Tripdetection Tripdetection

(2)

●

(9) (5)

○ ○ ○

●

Compressormotorcontrolerror Rotorpositiondetectionerror(stoppagepermanently)

(2)

●

(9) (7)

○ ○

● ●

Outdoorunitfanmotor1error Dutyerror

(2)

●

(9) (8)

○ ○

● ●

Outdoorunitfanmotor2error Dutyerror

(2)

●

(9) (9)

○ ○ ○

●

4-wayvalveerror 4-wayvalveerror

(2)

●

(10) (1)

○ ○ ○

●

Dischargetemp.1error Dischargetemp.1error

(2)

●

(10) (3)

○ ○ ○

●

Compressortemp.error Compressor1temp.error

(2)

●

(10) (5)

○ ○ ○

●

Pressureerror2 Lowpressureerror

Displaymode

:Lightson



:Lightsoff



:Blink(0.5sLightson/0.5sLightsoff)

 ():Numberofashing

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11. PUMP DOWN

WARNING

Nevertouchelectricalcomponentssuchastheterminalblocksexceptthebuttonon

thedisplayboard.Itmaycauseaseriousaccidentsuchaselectricshock.

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breakageandeveninjury.

CAUTION

Performthepumpdownoperationbeforedisconnectinganyrefrigerantpipeor

electriccable.

Collectrefrigerantfromtheserviceportorthe3-wayvalveifpumpdowncannotbe

performed.

Incaseofgroupcontrolsysteminstallation,disconnectallremotecontrollercables

beforestartingthepumpdownoperation.



(Groupcontrolsysteminstallationisdescribedin“SPECIALINSTALLATION

METHODS”intheinstallationmanualoftheindoorunit.)

Pleasechecktherefrigerantcircuitforanyleaksbeforestartingthepumpdown

operation.

Donotproceedwiththepumpdownoperationifthereisnorefrigerantleftinthe

circuitduetobentorbrokenpiping.

• Operate[PUMPDOWN]buttononthedisplayboardinthemannerdescribed

below.

6:

6:

6: 6: 6:











LEDdisplaypart

Buttonpart

11.1. Preparation for pump down

• Conrmthatthepowerisoff,andthenopentheservicecover.

11.2. Pump down procedure

(1) Checkthe3-wayvalves(boththeliquidsideandgasside)areopened.

(2) Turnthepoweron.

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

● ○ ○ ○ ○ ○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

(3) Press[PUMPDOWN]buttonfor3secondsormoreafter3minutesafterpoweron.

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

● ○ ● ○ ○ ● ● ●

Sign“

○

”:Lightsoff,“

●

”:Lightson

LEDdisplaylightsonasshownintheabovegure,andthefansandthe

compressorstartoperating.

• If[PUMPDOWN]buttonispressedwhilethecompressorisoperating,the

compressorwillstop,thenstartagaininabout3minutes.

(4) LEDdisplaywillchangeasshownbelowabout3minutesafterthecompressor

starts.Fullyclosethe3-wayvalveontheliquidpipesideatthisstage.

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

● ○ ● ○ ○ ○ ● ●

Sign“

○

”:Lightsoff,“

●

”:Lightson

• Ifthevalveontheliquidpipesideisnotclosed,thepumpdowncannotbe

performed.

(5) WhenLEDdisplaychangesasshowninthebelowgure,closethe3-wayvalveon

thegaspipesidetightly.

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

● ○ ● ○ ○ ○ ○ ●

Sign“

○

”:Lightsoff,“

●

”:Lightson

• Ifthevalveonthegaspipesideisnotclosed,refrigerantmayowintothepiping

afterthecompressorstops.

Step(5)

Closingdirection

Step(4)

Hexagonwrench

Liquidpipe

Gaspipe

Closingdirection

(6) LEDdisplaychangesafter1minuteasshowninthegurebelow.

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

● ○ ● ○ ○ ○ ○ ○

Sign“

○

”:Lightsoff,“

●

”:Lightson

Fansandcompressorstopautomatically.

• Ifthepumpdownissuccessfullycompleted(theaboveLEDdisplayisshown),the

outdoorunitremainsstoppeduntilthepoweristurnedoff.

(7) Turnthepoweroff.

POWER/

MODE

ERROR

PUMP

DOWN

LOW

NOISE

PEAK

CUT

(L1) (L2) (L3) (L4) (L5) (L6)

○ ○ ○ ○ ○ ○ ○ ○

Sign“

○

”:Lightsoff

PUMPDOWNiscompleted.

NOTES:

• Tostoppumpdown,press[PUMPDOWN]buttonagain.

• Tostartthepumpdownagainafterthecompressorisautomaticallystoppedduetoan

error,turnthepoweroffandopenthe3-wayvalves.Wait3minutes,turnthepoweron

andstartthepumpdownagain.

• Whenstartingtheoperationaftercompletionofthepumpdown,turnthepoweroff,

andthenopenthe3-wayvalves.Wait3minutes,turnthepoweronandperformatest

runinthe“COOL”operationmode.

• Ifanerroroccurs,recovertherefrigerantfromserviceport.

9379069946-02_IM.indd 18 7/8/2019 09:46:01

9379069946-02_IM.indd 19 7/8/2019 09:46:02

9379069946-02_IM.indd 20 7/8/2019 09:46:02

Fujitsu AOTG34KMTC Installation guide

Fujitsu AOTG34KMTC Installation guide

Fujitsu AOTG34KMTC Installation guide

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