Hitachi RPC-2.0FSR Instruction Manual

A10762300A
Type Model
Ceiling
RPC-1.5FSR
RPC-2.0FSR
RPC-2.5FSR
RPC-3.0FSR
RPC-4.0FSR
RPC-5.0FSR
RPC-6.0FSR
Installation
&
Maintenance
Manual
INVERTER-DRIVEN
MULTI-SPLIT SYSTEM
HEAT PUMP
AIR CONDITIONERS
IMPORTANT:
READ AND UNDERSTAND
THIS MANUAL BEFORE
INSTALLING THIS HEAT
PUMP AIR CONDITIONERS.
KEEP THIS MANUAL FOR
FUTURE REFERENCE.

A10762300A-rev.1 i
IMPORTANT NOTICE
● HITACHIpursuesapolicyofcontinuingimprovementindesignandperformanceofproducts.
Therightisthereforereservedtovaryspecicationswithoutnotice.
● HITACHIcannotanticipateeverypossiblecircumstancethatmightinvolveapotentialhazard.
● Thisheatpumpairconditionerisdesignedforstandardairconditioningonly.Donotusethisheatpump
airconditionerforotherpurposesuchasdryingclothes,refrigeratingfoodsorforanyothercoolingor
heatingprocess.
● Donotinstalltheunitinthefollowingplaces.Itmaycauseare,deformation,corrosionorfailure.
*Placeswhereare,oil,steamorpowdermayenterdirectlytotheunitsuchasrightaboveakitchen,etc.
*Placeswhereoil(includingmachineryoil)maybepresentinquantities.
*Placeswherealotofsuldegasdriftssuchasinahotspring.
*Placeswhereinammablegasmaygenerateorow.
*Placeswherestrongsaltywindblowssuchascoastregions.
*Placeswithanatmosphereofacidityoralkalinity.
*Placeswheregasfromfesteringtrash,etc.maygenerate.
● Donotinstalltheunitintheplacewheresilicongasdrifts.Ifthesilicongasattachestothesurfaceofheat
exchanger,thensurfacerepelswater.Asaresult,drainwatersplashesoutsideofthedrainpanand
splashedwaterrunsinsideofelectricalbox.Intheend,waterleakageorelectricaldevicesfailuremay
occur.
● Payattentiontothefollowingpointswhentheunitisinstalledinahospitalorotherfacilitieswherean
electromagneticwavegeneratesfromamedicalequipment.
*Donotinstalltheunitintheplacewhereanelectromagneticwaveisdirectlyradiatedtotheelectricalbox,
controllercableorcontroller.
*Installtheunitatleast3metersawayfromanelectromagneticwavesuchasaradio.
● Donotinstalltheunitintheplacewherethebreezedirectlycatchesanimalsandplants.Itcouldadversely
a󰀨ectanimalsandplants.
● Theinstallerandsystemspecialistshallsecuresafetyagainsttherefrigerantleakageaccordingtolocal
regulationsorstandards.Thefollowingstandardsmaybeapplicable,iflocalregulationsarenotavailable.
InternationalOrganizationforStandardization,ISO5149orEuropeanStandard,EN378orJapanStandard,
KHKS0010.
● ThisunitRPC-(1.5~6.0)FSRisapartialunitairconditioner,complyingwithpartialunitrequirements
ofInternationalStandardIEC60335-2-40,andmustonlybeconnectedtootherunitsthathavebeen
conrmedascomplyingtocorrespondingpartialunitrequirementsofthisInternationalStandard.
● Nopartofthismanualmaybereproducedwithoutwrittenpermission.
● ItisassumedthatthisheatpumpairconditionerwillbeoperatedandservicedbyEnglishspeakingpeople.
Ifthisisnotthecase,thecustomershouldbeaddsafety,cautionandoperatingsignsinthenative
language.
● Ifyouhaveanyquestions,contactyourdistributorordealerofHITACHI.
● Thismanualprovidescommondescriptions,basicandadvancedinformationtomaintainandservicethis
heatpumpairconditioningunitwhichyouoperateaswellforothermodels.
● Thisproductisdesignedforstandardairconditioningonly.
DONOTusethisproductforspecicpurposes,suchasrestoringfoods,animals&plants,precision
devices,artobjects,etc.

ii A10762300A-rev.1
CHECKING PRODUCT RECEIVED
● Uponreceivingthisproduct,inspectitforanyshippingdamage.
Claimsfordamage,eitherapparentorconcealed,shouldbeledimmediatelywiththeshippingcompany.
● Checkthemodelnumber,electricalcharacteristics(powersupply,voltageandfrequency)andaccessories
todetermineiftheyarecorrect.
Thestandardutilizationoftheunitshallbeexplainedintheseinstructions.
Therefore,theutilizationoftheunitotherthanthoseindicatedintheseinstructionsisnotrecommended.Pleasecontactyourlocalagent,
astheoccasionarises.
HITACHI’sliabilityshallnotcoverdefectsarisingfromthealterationperformedbyacustomerwithoutHITACHI’sconsentinawrittenform.
Temperature (oC)
Maximum Minimum
Cooling
Operation
Indoor 30 DB 21.5 DB
Outdoor 43 DB* -5 DB*
Heating
Operation
Indoor 25 DB 17 DB
Outdoor 15.5 WB* -10 WB*
DB:DryBulb,WB:WetBulb
*Thetemperaturemaychangedependingontheoutdoorunit.
● Thismanualshouldbeconsideredasapermanentpartoftheairconditioningequipmentandshould
remainwiththeairconditioningequipment.
● DONOTinstallthelowercoverwithmotionsensorinthefollowingplaces.
Itmaycausemisdetection,undetectableofmotionorthedeteriorationofthemotionsensor.
*Placeswhereambienttemperaturechangesdrastically.
*Placeswhereexcessiveforceorvibrationisappliedtothemotionsensor.
*Placeswherestaticelectricityorelectromagneticwavesmaygenerate.
*Placeswhereisinterferenceforinfraredlightsuchasglassesormistinadetectingarea.
*Placeswherethelensformotionsensorisexposedinhightemperatureandhumidityforalongtime.
*Placeswhereuidandcorrosivegasexist.
*Placeswheredirectlightssuchassunlightorheadlighta󰀨ectthemotionsensor.
*Placeswherehotairfromaheater,etc.a󰀨ectsdirectlythemotionsensor.
*Placeswheretheairowreturnstothemotionsensorbyhittingobstaclessuchasshelf,locker,etc.
*Placeswheretheblowerdevicessuchasceilingfan,ventilatingfan,etc.a󰀨ecttheairowfromthe
indoorunit.
*Placeswhereweathera󰀨ectsdirectlythesurfaceofthemotionsensor.
*Placeswherethelenssurfacemaysmudgeorbedamagedsuchasadustyenvironment.
Payattentionthatthedetectingfunctionwillbedecreasedifthelensformotionsensorsmudges.
Inthiscase,wipeo󰀨smudgesbyacottonswabsoakedalcohol(Isopropylalcoholisrecommended.)
orasoftcloth.
(Whenwipingo󰀨smudgesonthelensformotionsensor,donotapplyexcessiveforce.
Ifexcessiveforceisapplied,theresinlensmaybedamagedsothatmaycausemalfunctionssuchas
misdetectionorundetectableofthemotion.)
● Thisheatpumpairconditionerhasbeendesignedforthefollowingtemperatures.Operatetheheatpump
airconditionerwithinthisrange.

A10762300A-rev.1 iii
TABLE OF CONTENTS
1. SafetySummary .............................................................................................................................................1
2. Structure .........................................................................................................................................................6
2.1 NameofParts ........................................................................................................................................6
2.2 RefrigerantCycle....................................................................................................................................7
2.3 NecessaryToolsandInstrumentListforInstallation ..............................................................................7
3. BeforeInstallation ...........................................................................................................................................8
3.1 CombinationofOutdoorUnitandIndoorUnit ........................................................................................8
3.2 TransportationandHandling ..................................................................................................................8
4. IndoorUnitInstallation ....................................................................................................................................9
4.1 Factory-SuppliedAccessories ................................................................................................................9
4.2 InitialCheck..........................................................................................................................................10
4.3 Installation ............................................................................................................................................ 11
4.3.1 PositionofSuspensionBolts ...................................................................................................... 11
4.3.2 InstallationofSuspensionBolts..................................................................................................12
4.3.3 MountingIndoorUnit ..................................................................................................................12
4.3.4 InstallationofWiredController....................................................................................................13
5. RefrigerantPipingWork................................................................................................................................14
5.1 PipingMaterials....................................................................................................................................14
5.2 PipingConnection ................................................................................................................................15
5.2.1 PositionofPipeConnection........................................................................................................15
5.2.2 PipingConnection.......................................................................................................................16
5.2.3 RefrigerantPipingforR32 ..........................................................................................................18
6. DrainPiping ..................................................................................................................................................19
7. ElectricalWiring ............................................................................................................................................21
7.1 GeneralCheck .....................................................................................................................................21
7.2 ElectricalWiringCapacity.....................................................................................................................22
7.2.1 FieldMinimumWireSizesforPowerSource .............................................................................22
7.2.2 DetailsofElectricalWiringConnection.......................................................................................23
7.3 PositionofElectricalWiringConnection...............................................................................................29
7.4 TransitionWiringforWiredController ..................................................................................................32
7.4.1 CautionsforIndividualLouverSetting........................................................................................34
7.4.2 CautionsforMotionSensorKit(SOR-NEP) ...............................................................................35
7.4.3 CautionforElectricalWiring .......................................................................................................37
7.5 WiringConnection ................................................................................................................................38
7.6 DipSwitchesSetting ............................................................................................................................38
7.7 FunctionSelectionbyWiredController ................................................................................................39
8. TestRun........................................................................................................................................................40
8.1 BeforeTestRun....................................................................................................................................40
8.2 TestRun ...............................................................................................................................................40
9. SafetyandControlDeviceSetting ................................................................................................................45

A10762300A-rev.1 1
<SignalWords>
● Signalwordsareusedtoidentifylevelsofhazardseriousness.
Denitionsforidentifyinghazardlevelsareprovidedbelowwiththeirrespectivesignalwords.
: DANGERindicatesahazardoussituationwhich,ifnotavoided,
willresultindeathorseriousinjury.
: WARNINGindicatesahazardoussituationwhich,ifnotavoided,
couldresultindeathorseriousinjury.
: CAUTION,usedwiththesafetyalertsymbol,indicatesahazardoussituationwhich,
ifnotavoided,couldresultinminorormoderateinjury.
: NOTICEisusedtoaddresspracticesnotrelatedtopersonalinjury.
: NOTEisusefulinformationforoperationand/ormaintenance.
1. Safety Summary
DANGER
WARNING
CAUTION
NOTICE
NOTE

2 A10762300A-rev.1
● Donotperformtheinstallationwork,refrigerantpipingwork,drainpump,drainpipingandelectricalwiring
connectionwithoutreferringtoourinstallationmanual.Iftheinstructionsarenotfollowed,itmayresultin
awaterleakage,electricshockorare.
● Usethespeciedrefrigerant(R410AorR32)totheoutdoorunitintherefrigerantcycle.
DonotchargematerialotherthanR410AorR32intotheunitsuchashydrocarbonrefrigerants(propane
oretc.),oxygen,ammablegases(acetyleneoretc.)orpoisonousgaseswheninstalling,maintainingand
moving.Theseammablesareextremelydangerousandmaycauseanexplosion,are,andinjury.
● Donotpourwaterintotheindoorunit.Theseproductsareequippedwithelectricalparts.
Ifpoured,itwillcauseaseriouselectricalshock.
● DonotopentheservicecoverfortheindoororoutdoorunitwithoutturningOFFthemainpowersupply.
● Donottouchoradjustsafetydevicesinsidetheindoorunitoroutdoorunit.Ifthesedevicesaretouched
orreadjusted,itmaycauseaseriousaccident.
● Refrigerantleakagecancausedi󰀩cultywithbreathingduetoinsu󰀩cientair.TurnOFFthemainswitch,
extinguishanynakedamesandcontactyourservicecontractor,ifrefrigerantleakageoccurs.
● Makesurethatarefrigerantleaktesthasbeenperformed.Refrigerant(FluorocarbonorDiuoromethane)
forthisunitisnon-toxic,andodorless.Iftherefrigerantshouldsomehowescapeandcomeintocontact
withame,toxicgaswillform.Thisgasisheavierthanairandwillsettlenearoorareasandspread
whereitcancausesu󰀨ocationtothosenearby.Inaddition,diuoromethaneisammableandcancause
re.
● Theinstallerandsystemspecialistshallsecuresafetyagainstrefrigerantleakageaccordingtolocal
regulationsorstandards.
● UseanELB(EarthLeakageBreaker).
Intheeventoffault,thereisdangerofanelectricshockorareifitisnotused.
● Donotinstalltheoutdoorunitwherethereishighlevelofoilmist,ammablegases,saltyairorharmful
gasessuchassulfur.
● Forinstallation,rmlyconnecttherefrigerantpipebeforethecompressorstartsoperating.
Formaintenance,relocationanddisposal,removetherefrigerantpipeafterthecompressorstops.
● Donotperformashort-circuitoftheprotectiondevicesuchasthepressureswitchwhenoperating.
Itmaycauseareandexplosion.
● Donotaltertheproductandtheelectricalwiring.Itwillcauseaseriousaccident.
● Donotinstalltheindoorunitinammableenvironmenttoavoidreorabexplosion.
● Asthenewrefrigerant(R410AorR32)isadopted,therefrigerantoilhasbeenalsochanged,whichtends
tobea󰀨ectedbyforeignmatterssuchasmoisture,oxidelm,fat.Performtheinstallationworkwith
carenottoentermoisture,dustoroldrefrigerantintotherefrigerantcycle,otherwisethepartssuchas
expansionvalvebiteforeignmatterandtheoperationmaybeunavailable.
● Donotinsertthedrainpipetothedrainagetrenchwherecorrosivegasesoccur.Poisonousgasesow
intotheroom,sothatmaycausethepoisoning.
● CleaninginsideExistingRefrigerantPipe
*Non-ammableandnontoxicdetergentshallbeusedtocleanthepipe.Ifnot,itmaycauseare.
*Ventilatewell,otherwisecleaningthepipeinthesealedroommaycausesu󰀨ocation.Additionally,ifthe
detergentcontactsareandisunderhightemperature,itmaycausegenerationoftoxicgas.
*Thedetergentaftercleaningshallberecovered.Itisprohibitedtoemituorocarbonstotheatmosphere
withoutpermission.
DANGER

A10762300A-rev.1 3
● Theinstallationworkshallbeperformedbythespecialistinstaller.
Ifitisnotcompleted,itmaycauseawaterleakage,anelectricshock,areorfallingdowntheunit.
● PerformtheelectricalworkaccordingtoInstallationManualandalltherelevantregulationandstandards.
Iftheinstructionsarenotfollowed,anelectricalshockandremayoccurduetoinsu󰀩cientcapacityand
inadequateperformance.
● Theelectricalwiringworkmustbeperformedbyauthorizedinstallers.
Ifnotperformingtheelectricalworkcompletelyoracapacityshortageofthepowercircuit,itmaycausean
electricshockorare.
Additionally,iftheearthwireisdisconnected,itmaycauseanelectricshock.
Contacttheauthorizedinstallerandconnecttheearthwiring.
● Ifthecircuitbreakerorfuseisoftenactivated,stopthesystemandcontactyourservicecontractor.
● Checkthatthegroundwireissecurelyconnected.Iftheunitisnotcorrectlygrounded,itleadelectric
shock.Donotconnectthegroundwiringtoagaspiping,waterpiping,lightingconductororgroundwiring
fortelephone.
● Usespeciedcablesbetweenunitsandchoosethecablescorrectly.Ifnot,anelectricalshockorremay
occur.
● Ensurethatthewiringterminalsaretightenedsecurelywiththespeciedtorques.Ifnot,generatingreor
anelectricalshockattheterminalconnectionpartmayoccur.
● Connectafuseofspeciedcapacity.
● Protectthewires,electricalparts,etc.fromratsorothersmallanimals.
Ifnotprotected,ratsmaygnawatunprotectedpartsandwhichmayleadtoare.
● Fixthecablessecurely.Externalforcesontheterminalscouldleadtoare.
● Provideasu󰀩cientlystrongfoundation.Ifnot,theunitmayfalldownanditmayleadtoinjuries.
● Iftheindoorunitisinstalledinasmallroomandtherefrigerantgasleakageoccurs,theleakedrefrigerant
gasllstheroomanditmaycausesu󰀨ocation.
Donotexceedthemaximumpermissibleconcentrationoftherefrigerantgasintheroom.
Consultwithdistributorforcountermeasuresuchaventilationsystem,etc.
● Beforeperforminganybrazingwork,checktoensurethatthereisnoammablematerialaround.
Whenusingtherefrigerantbesuretowearleatherglovestopreventcoldinjuries.
● Donotinstalltheunitinaplacewhereoil,vapor,organicsolventandcorrosivegas(ammonia,sulfur
compoundandacid)maybepresentinquantities.
Itmaycauserefrigerantleakageduetocorrosion,electricalshock,deterioratedperformanceand
breakage.
● Donotinsertangerorstickintotheairoutletandtheairinlet.
Itcouldcauseinjuryduetotouchtherotatingfanorelectricaldevices.
● Donotcontrolthewiredcontrollerbywethand.
Itmaycausefailureofthewiredcontrolleroranelectricshock.
● Donotuseanysprayssuchasaninsecticide,lacquer,hairsprayorotherammablegaseswithin
approximatelyone(1)meterfromthesystem.Itmaygenerateare.
● Donotinstalltheindoorunitinaplacewheretheairowblowsdirectlytoheatingappliances.
Itmaycauseincompletecombustionoftheheatingappliances.
● Whentheindoorunitisoperatedwithheatingappliances,ventilatearoomsu󰀩ciently.
Ifnot,itmaycausesu󰀨ocation.
● TurnOFFthemainpowersourceimmediatelyiftheprotectiondeviceisfrequentlyactivatedorthemain
powersourceswitchdoesnotwork.
Ifnot,itmaycauseanelectricshock,areorexplosionbecausetherearepossibilitiesoftheelectrical
leakageorovercurrent,etc.Contactyourdistributororcontractor.
WARNING

4 A10762300A-rev.1
RISK OF EXPLOSION
Thecompressormustbestoppedbeforeremovingtherefrigerantpipes.
Allservicevalvesmustbefullyclosedafterpumpingdownoperation.
● Makesurethatunitinstallationandrefrigerantpipinginstallationcomplywithapplicablelegislationin
eachcountry.Also,inEurope,EN378mustbecomplied,asitistheapplicablestandard.
● Pleasereadthemanualcarefullybeforestartingtoworkontheinstallationoftheheatpumpair
conditionersystem.Failuretoobservetheinstructionsforinstallation,useandoperationdescribedinthis
documentationmayresultinoperatingfailureincludingpotentiallyseriousfaults,oreventhedestruction
oftheheatpumpairconditionersystem.
● Verifythatalltheinformationrequiredforthecorrectinstallationofthesystemiscorrectaccordingtothe
manualsbundledwithoutdoorandindoorunits.
Contactyourdistributorifitisnotthecase.
Additional safety information for R32 refrigerant air conditioner and heat pump according
to IEC 60335-2-40: 2018.
Explanationofsymbolsdisplayedontheindoorunitoroutdoorunit.
WARNING
Thissymbolshowsthatthisequipmentusesa
ammablerefrigerant(A2L).
Iftherefrigerantisleaked,togetherwithanexternal
ignitionsource,thereisapossibilityofignition.
CAUTION ThissymbolshowsthattheOperationManualshould
bereadcarefully.
CAUTION
Thissymbolshowsthataservicepersonnelshould
behandlingthisequipmentwithreferencetothe
InstallationManual.
CAUTION Thissymbolshowsthatthereisinformationincludedin
theOperationManualand/orInstallationManual.
NOTE
● Ifabnormality(burntodor,etc.)occurs,stoptheoperationandturnOFFthemainpowersource
immediately.Ifnot,itmaycausebreakageoftheproduct,anelectricshockorare.
Contactyourdistributororcontractor.
● Donotoperatetheindoorunitwithouttheelectricalboxcoverandtheairinletgrille.Itisunusually
dangerousthattheindoorfanandelectricalpartsareexposed.Inaddition,itmaycauseanelectricshock
duetotouchtheelectricalparts.
● Whentheairconditionerisnecessarytoberepairedorrelocated,contactyourdistributororcontractor.
Iftherepairandtheinstallationarenotcompleted,itmaycauseanelectricshockorare.
● Donotperformtheinstallationwork,therefrigerantpipingwork,thedrainpump,thedrainpipingand
electricalwiringconnectionwithouttuningOFFthemainpowersource.
Itmaycauseanelectricshockorinjury.
● Performthemaintenanceworkwithstablefooting.Ifnot,itmaycausefallingorinjury.
● Donotspraywaterordetergenttotheindoorunitwhenperformingthemaintenancework.
Itmaycauseanelectricshockorarebyelectricalshort-circuit.
● Protectsecurelytheelectricalpartsandconnectorsnottosplashwaterwhenperformingthemaintenance
work.Itnot,Itmaycauseanelectricshockorarebyelectricalshort-circuit.
● Theinsidepipingchargedrefrigerantishighpressure.Performsecurelytherefrigerantpipingworkbythe
authorizedinstaller.Ifnot,itmaycauseaseriousaccident.

A10762300A-rev.1 5
● Donotsteporputanymaterialontheproduct.
● Donotputanyforeignmaterialontheunitorinsidetheunit.
●DonotturnOFFthemainpowersourceoftheindoorunitduringtheseasonofheatingandcooling.
Thewatercannotbedischargedforcedlysothatoverowsfromthedrainpan.
Astheresult,theoorandtheceilingsurfacearesmudged.
●Holdtheairlterandtheairinletgrillebyhandwhenattaching(removing).
Ifnot,itmaycausefallingorinjury.
● Donotblowcoldairtoapersonforalongtimeorovercool.
Itmaycausedeteriorationofphysicalconditionandhealthimpairment.
● Donothandletheunitbyoneperson.Althoughtheunitmaybepackedbypolypropyleneband,donot
useitfortransportation.Iftheunitishandledbyhand,thensurfaceofheatexchangercausesacut.
● Donotinstalltheindoorunit,outdoorunit,wiredcontrollerandcablewithinapproximately3metersfrom
strongelectromagneticwaveradiatorssuchasmedicalequipments.
● Supplyelectricalpowertothesystemtoenergizetheoilheaterfor12hoursbeforestartupafteralong
shutdown.
● Makesurethattheoutdoorunitisnotcoveredwithsnoworice,beforeoperation.
● Insomecases,thepackagedairconditionermaynotbeoperatednormallyunderthefollowingcases.
* Incasethatelectricalpowerforthepackagedairconditionerissuppliedfromthesamepower
 transformerasthedevice*.
*Incasethatthepowersourcewiresforthedevice*andthepackagedairconditionerarelocatedcloseto
 eachother.
Device*: (Ex) Lift,containercrane,rectierforelectricrailway,inverterpowerdevice,arcfurnace,
 electricfurnace,large-sizedinductionmotorandlarge-sizedswitch.
Itconsumesalargequantityofelectricalpower.
 Regardingthecasesmentionedabove,surgevoltagemaybeinductedinthepowersupplywiringforthe
packagedairconditionerduetoarapidchangeinpowerconsumptionofthedeviceandanactivationof
switch.
Therefore,checktheeldregulationsandstandardsbeforeperformingelectricalworkinordertoprotect
thepowersupplyforthepackagedairconditioner.
● Donotinstalltheunitintheplacewheretheairowdirectlycatchestoanimalsorplants.
Itcouldbethecauseofadversea󰀨ecttoanimalsorplants.
● Donotcreateanupper-slopeorriseforthedrainpipingsincedrainwatercanowbacktotheindoorunit
andleakageintotheroomwilloccur.
● Donotapplyexcessiveforcetothearenutwhentightening.Ifitisapplied,thearenutmaycrackdue
toageddegradationandrefrigerantleakagemayoccur.Usethespeciedtighteningtorque.
● Itisrecommendedthattheroomwillbeventilatedevery3to4hours.
● Theheatingcapacityoftheheatpumpunitisdecreasedaccordingtotheoutdoorairtemperature.
Therefore,itisrecommendedthatauxiliaryheatingequipmentbeusedintheeldwhentheunitsis
installedinalowtemperatureregion.
NOTICE
NOTE
CAUTION

6 A10762300A-rev.1
2. Structure
2.1 NameofParts
No. PartName Remarks
1Fan
2FanMotor
3HeatExchanger
4Distributor
5Strainer
6Micro-ComputerControlExpansionValve
7ElectricalControlBox
8 RefrigerantGasPipeConnection withfaFlareNut
9 RefrigerantLiquidPipeConnection withfbFlareNut
10 DrainPipe
11 AutoLouverMotor
12 DrainPan
13 AirInletGrille
14 AirFilter
15 AirOutlet
16 AirInlet
Model abcd
RPC-1.5FSR 12.7 6.35 960 916
RPC-2.0FSR 12.7 6.35 960 916
RPC-2.5FSR 15.88 9.52 1270 1226
RPC-3.0FSR 15.88 9.52 1270 1226
RPC-4.0FSR 15.88 9.52 1580 1536
RPC-5.0FSR 15.88 9.52 1580 1536
RPC-6.0FSR 15.88 9.52 1580 1536
>ABS<
HB
17A22761
>ABS<
HB
17A22761
12
15
16 14
1312
11
10
9
8
7
6 543
1 1
690
235
241
c
d

A10762300A-rev.1 7
2.2 RefrigerantCycle
Mark PartName
1HeatExchanger
2Distributor
3Strainer
4Micro-ComputerControlExpansionValve
HP 1.5and2.0 2.5to6.0
A(GasPipeConnection) f12.7x0.8 f15.88x1.0
B(LiquidPipeConnection) f6.35x0.8 f9.52x0.8
C(ODxT) f12.7x0.8 f15.88x1.0
D(ODxT) f12.7x0.8 f12.7x0.8
2.3 NecessaryToolsandInstrumentListforInstallation
Usetoolsandmeasuringinstruments(vacuumpump,gashose,chargingcylinder,
gaugemanifold,etc.)exclusivelyfortherefrigerantR410AorrefrigerantR32.
NOTE
1
2
3
4
Indoor Unit
S
S
3
Refrigerant Gas Pipe Connection ( )
A
Refrigerant Liquid Pipe Connection ( )
B
C
D
: Field Refrigerant Piping
: Flare Connection
: Refrigerant Flow Direction (Cooling)
: Refrigerant Flow Direction (Heating)
No. Tool No. Tool No. Tool
1Handsaw 8 Plier 16 CutterforWires
2PhillipsScrewdriver 9 PipeCutter 17 GasLeakDetector
3VacuumPump 10 BrazingKit 18 Leveller
4RefrigerantGasHose 11 HexagonWrench 19 ClamperforSolderlessTerminals
5Megohmmeter 12 Spanner 20 Hoist(forIndoorUnit)
6CopperPipeBender 13 Weigher 21 Ammeter
7ManualWaterPump
(forIndoorUnit)
14 ChargingCylinder 22 VoltageMeter
15 GaugeManifold 23 Wrench

8 A10762300A-rev.1
3.2 TransportationandHandling
Do not put any material on the product. Do not
step on the product.
Do not put any foreign material into the indoor
unit and check to ensure that no foreign
material exists in the indoor unit before the
installation and the test run. Otherwise, a re
or failure, etc. may occur.
• Transporttheproductasclosetotheinstallation
locationaspracticalbeforeunpacking.
(3) Pushthesidecoverforwardtoremovethe
 hooksandthehookingplate.
(4) Removethesidecovertoliftupward.
• Whentheindoorunitisunpacked,moved
andinstalled,donottaketheairinletgrille,
louverandlowercover.Additionally,donot
applyanexcessiveforcetothem.Theairinlet
grille,louverandlowercoveraredeformedor
damaged.
• Donotputanymaterialontheindoorunit.
• Removethesidecoverwhentheindoorunitis
movedafterunpacking.Ifnot,thesidecover
maybedamagedsothatmaycauseinjury.
 <RemovingSideCover>
(1) Opentheairinletgrille.
(2) Removethexingscrew(M4).
3. Before Installation
3.1 CombinationofOutdoorUnitandIndoor
Unit
Thecombinationcapacityofindoorunitagainst
theoutdoorunitisselectedbytheoutdoorunit
capacity.Refertotheinstallationmanualof
outdoorunitandselecttheindoorunitandthe
outdoorunittobesatisedthecombinationunit
numberandthecombinationunitcapacity.
●The indoor unit covers are resin made.
Do not apply an excessive force to the resin
covers or make it fall.
●Do not move the louver by hand. If moved,
the louver mechanism will be damaged.
Toavoiddamagetotheresincovers,beforelifting
ormovingtheindoorunit,putaclothontheresin
covers.
Fixing Screw
(M4)
Position for Fixing Screw
Hooking Plate
Hooks
(3 Portions)
Air Inlet Grille
Side Cove
r
Louver
Lower Cover
Side Cover
Side Cover
Do not handle the side cover.

A10762300A-rev.1 9
4. Indoor Unit Installation
4.1 Factory-SuppliedAccessories
Checktoensurethatthefollowingaccessoriesare
packedwiththeindoorunit.
Thehoseclamp,screws,washersandcordclamps
areputinthepipeinsulation.
Table4.1Factory-SuppliedAccessories
NOTE
● Do not put any foreign material into the
indoor unit and check to ensure that none
exists in the indoor unit before the installation
and the test run. Otherwise, a re or failure,
etc. may occur.
● Check to ensure that the ceiling is strong
enough. If not strong enough, the indoor unit
may fall down on you.
● Do not install the indoor unit to outdoors.
If installed, an electric hazard or electric
leakage will occur.
Do not install the indoor unit in a ammable
environment to avoid re or an explosion.
•Ifanyoftheseaccessoriesarenotpackedwith
theunit,pleasecontactyourcontractor.
•Thewiredcontrollerandthebranchpipesare
optionalaccessorieswhicharenotincludedwith
theindoorunit.
Accessory Q’ty Purpose Usage
SuspensionBracket 2ForMountingIndoorUnit
Refertotheitem4.3.3.
Washer 8 ForSuspensionBracket
PipeInsulation
(Large) 1
ForRefrigerantPiping
Connection
Refertotheitem5.2.2.
PipeInsulation
(Small) 1
CordClamp
(Large) 6ForFixingInsulation
CordClamp
(Small) 1ForFixingPlug
Refertotheitem6.
DrainHose 1ForConnectingDrainPipe
HoseClamp 2ForConnectingDrainHose
Insulation 2ForDrainHoseConnection

10 A10762300A-rev.1
4.2 InitialCheck
Fig.4.1SpacearoundIndoorUnit
• Considertheairdistributionfromtheindoorunit
tothespaceoftheroom,andselectasuitable
locationsothatuniformairtemperatureinthe
roomcanbeobtained.
• Avoidobstaclessuchaselectriclight,partition
whichmayhampertheairinletortheairoutlet
ow.
• Checktoensurethattheceilinghasasu󰀩cient
strengthtohangtheindoorunit.
• Donotinstalltheindoorunitinamachineryshop
orkitchenwherevaporfromoiloritsmistows
totheindoorunit.
Anoilwilldepositontheheatexchanger,
therebyreducingtheindoorunitperformance
andtheplasticpartsmaydeform,andinthe
worstcase,breakduetosplashoilatoperation.
• Avoidtheinstallationplacewheretheindoorunit
maycontacthighhumidity.
• Thewarmedairmaystayatthehighceiling
spaceduringtheheatingoperation.Thus,the
parallelinstallingofacirculatorisrecommended.
• Theindoorunitcanbeinstalledupto3.5meters
(for1.5to3HP)and4.3meters(for4to6HP)
fromtheoorlevel.
• Avoidinstallingtheairconditioningwherethe
directairowblowsfromtheairoutlettothe
temperaturedetectingdevicessuchanalarm
deviceoracontroldevice.Itmaycauseafailure
ofanalarmdeviceoracontroldevice.
(Total Refrigerant Quantity per one Outdoor Unit)
Volume of the room where this
Indoor Unit is installed.
( ) ≤0.3kg/m3
●Check to ensure that the number of below
is within 0.3kg/m3. Otherwise it may cause
danger situation if the refrigerant in the
Outdoor Unit leaks into the room where this
Indoor Unit is installed.
In detail, refer to the Installation Manual for
outdoor unit.
●Make sure that a refrigerant leak test has
been performed. Refrigerant (Fluorocarbon
or Diuoromethane) for this unit is non-
toxic, and odorless. If the refrigerant should
somehow escape and come into contact with
ame, toxic gas will form. This gas is heavier
than air and will settle near oor areas and
spread where it can cause su󰀨ocation to
those nearby. In addition, diuoromethane is
ammable and can cause re.
• Installtheindoorunitwithaproperclearance
arounditforoperationandmaintenanceworking
space,asshowninFig.4.1.
• Donotinstallammablepartsintheservice
spacefortheindoorunit.
•Installtheindoorunithigherthan2.4meters
fromtheoorlevel.
NOTE:
Ifthereisacorniceontheceiling,measurethedimensionfromthefrontorundersurface.
<ForSingleInstallation>
<ForParallelInstallation>
Min. 40
Min.
300
Min.
300
(mm)
Min. 40
(mm)
Minimum service space to
tighten the suspension bolt
Min.
300
Min. 400
Min.
500
Min.
2500
Min. 8
Floor Level
Minimum service space
for auto louver motor

A10762300A-rev.1 11
4.3 Installation
4.3.1 PositionofSuspensionBolts
(1) Determinethenallocationandinstallation
directionofindoorunitwithcaretothespace
forpipingandwiring.
(2) Afterthepositionofindoorunitis
determined,makeholesintheceilingto
installthesuspensionbolts.
(3) Thepositionofsuspensionboltsisshown
below.
• MultipleCombinations
Thetwincombination,thetriplecombinationand
thequadcombinationforsimultaneousoperation
ofindoorunitsareinstalledinasameroomand
requiredtooperatewithequalconditions.Inthe
caseofthesecombinationindoorunittypes,if
eachindoorunitispartitionedbyawall,furniture
oracurtain,etc,itmaycauseanoperation
failure.Inaddition,inthecaseofrearranging
furnitureorremodelinganinteriorafterthe
installation,payattentiontoe󰀨ectsforindoor
unitscombinationoperation.
• Toavoidanycorrosiveactiontotheheat
exchangers,donotinstalltheindoorunitinan
acidoralkalineenvironment.
• Thetemperatureandhumidityinsidetheceiling
havethepotentialtoexceed30oC/RH(Relative
Humidity)80%.Thus,applyadditionalinsulation
materialstotheindoorunitexternalsurfaceto
avoiddewcondensation.
• Payattentiontothefollowingpointswhenthe
indoorunitisinstalledinahospitalorother
facilitieswherethereareelectronicwavesfrom
medicalequipment,etc.
(A) Donotinstalltheindoorunitwherethe
electromagneticwaveisdirectlyradiatedto
theelectricalbox,controllercableorwired
controller.
(B) Installtheindoorunitandcomponentsas
faraspracticaloratleast3metersfromthe
electromagneticwaveradiator.
(C) Prepareasteelboxandinstallthewired
controllerinit.Prepareasteelconduittube
andwirethecontrollercableinit.Then,
connectthegroundwirewiththeboxandthe
tube.
(D) Installanoiselterwhenthepowersupply
emitsharmfulnoises.
(4) CeilingWork:Itisdi󰀨erentdependingon
thebuildingstructure.Consultwithan
architectoraninteriornishworkerformore
information.
• Donotinstallelectriclightunitsandthe
indoorunittothesamefurringforceiling.
Ifinstalled,electriclightsmayickeror
vibratebytheindoorunitoperation.When
installingtheindoorunitandelectriclights,
afurringforceilingmustbeseparatedfor
each.
• Fortheindoorunitwithmotionsensor,the
detectingareaforthemotionsensorisshownin
thegurebelow.
HP AB
1.5,2 960 916
2.5,3 1270 1226
4~6 1580 1536
< Detecting Area >
1.8m
9m
7.2m
Floor-to
-
Ceiling
Height
2.7m
Example for 1.5 to 6HP indoor units
Depth 7m
0.8m from Floor Level
Detecting Area
Detecting Area
120(280)
(22)
A
(B)(22)
( ): Dimension for Suspension Bolt
Upper Surface

12 A10762300A-rev.1
4.3.2 InstallationofSuspensionBolts
(1) Thestructureofsuspendingpartshall
bestrongenough.Theductorfacilitates
suspendingwork.
(2) Strengthensuspensionboltswithsupport
platesfortheearthquakeresistantdepending
ontheneedsofthequakeproof.ApplyM10
ofsuspensionboltsandsupportplatesfor
theearthquakeresistant.(Field-Supplied)
 <ForSteelBeam>
(2) HangingIndoorUnit
< A. Hanging Indoor Unit
with Suspension Bracket >
(a) Makeholesintheceilingforsuspension
bolts.
(b) Removethesidecover.
Toremovethesidecover,refertothe
“HandlingofIndoorUnit”.
(c) Removethesuspensionbrackets
attachedtotheindoorunit.
(d) Fixthesuspensionbracketstothe
suspensionbolts.(4portions)
(e) Mounttheindoorunittothesuspension
brackets.
(f) Tightenthe4nutsandthexingscrewfor
suspensionbracket.
4.3.3 MountingIndoorUnit
(1) PatternBoardforInstallation
 Thepatternboardfortheinstallationis
printedonthepacking.
Whenmakingholesinwallandceiling,
thepatternboardwhichholepositionsfor
suspension,refrigerantpipeanddrainpipe
areprintedshallbeused.
 <ForConcreteSlab>
Anchor Bolt
Concrete
Steel
150 to 160mm Insert
(100 to 150kg)
(W3/8 or M10)
Upper Cap
The pattern board is
attached in the upper cap.
Washer
Nut
Suspension
Bracket
Suspension
Bolt
Suspension Bolt
Max. 50mm
Tighten accessory
4 nuts (M8).
Nut
(Accessory) Rear Side
of Indoor Unit
(6mm)
Ceiling
Suspension Bolt
I Beam
Suspension Bolt
(W3/8 or M10)
NOTES:
 Tohangtheindoorunit,astrongsquare
lumbershallbeutilized.
 Span<90cm:
SquareLumberlargerthan6cm
 Span<180cm:
SquareLumberlargerthan9cm

A10762300A-rev.1 13
< B. Hanging Indoor Unit
without Suspension Bracket >
 (Ifthereisnotenoughservicespace
betweentheceilingandtheindoorunit,hang
theindoorunitbymethodA.)
(a) Determinethepositiontoinstallthe
suspensionbolt.
(b) Fixthewasherandnuttothesuspension
bolt.
(c) Mounttheindoorunittothesuspension
bolts.
NOTE:
Theceilingsurfacemaynotbehorizontal.
Whentheindoorunitismounted,check
thelevelnessbyaleveltobethedrainpipe
connectiondown-slope.Iftheindoorunitis
mountedwithincorrectsuspendingposition,
itmaydeformandtheabnormalvibration
mayoccur.
(3) Whentheindoorunitismounted,create
down-slopetowarddrainpipeconnection
tobewelldrainage.Therightgureshows
therightdrainpipeconnection.(Before
shipment)Fortheleftdrainpipeconnection,
createdown-slopetowardleft.
4.3.4 InstallationofWiredController
Theinstallationofwiredcontrollershallbe
performedaccordingtotheinstallationmanualof
itself.
(4) Attachthesidecoverandthesupporting
string.
(5) Removetheprotectionlmattachedtothe
louversurface.
(6) Removetheprotectiontapeattachedtothe
airinletlter.
Ceiling
Suspension Bolt (Field-Supplied)
Nut (Field-Supplied)
Washer (Field-Supplied)
Suspension Bolt
Max. 50mm
Nut (Field-Supplied)
Washer (Field-Supplied)
View from Front
(Drain Pipe Connection)
1 ~ 10mm
from horizontal
View from Right
1 ~ 10mm
from horizontal
Lower the indoor unit
10mm when the optional
drain-up mechanism is
installed.

14 A10762300A-rev.1
5. Refrigerant Piping Work
(3) Prepareeld-suppliedcopperpipes.
(4) Selectcleancopperpipes.Makesurethereisnodustandmoistureinside.
(5) TherefrigerantlubricatingoilusedintheseunitsisPolyvinylether(PVE),achemicallystable,resilient,
syntheticlubricantthat,whencombinedwithrefrigerantR410AorrefrigerantR32,maintainsits
compatibility,lubricity,andviscosityoverextendedperiodsoftimeandisimpervioustoheat,oxidation,
moistureabsorptionandbreakdownaslongasitremainsinasealedsystem.Itschemicalproperties
willremainintactonlysolongasmoistureisnotintroducedintothesystem.
Thegaseouselement,PVEisamoisturemagnetthat,onceexposedtoopenairandcan
quicklybecomesaturatedwithmoisture,loseitslubricity,andbecomeuseless.Minimize
exposuretotheopenair,overthesummermonths,andinsouthernortropicalclimates.
(6) Useapipecuttertoavoidagrindswarfgenerationforthepipecuttingwork.(Donotuseasawora
grindstonetocutpipes.)Blowtheinsideofthepipeswithnitrogenordryair,toremoveanydustor
foreignmaterialsbeforeconnectingpipes.
5.1 PipingMaterials
(1) Thetoleranceofrefrigerantpipinglengthdi󰀨ersdependingonthecombinationwiththeoutdoorunit.
Thedetailsshallbereferredto“Installation&MaintenanceManual”oftheoutdoorunit.
(2) Selectthepipingsizefromthefollowingtable.
mm(in.)
Model GasPiping LiquidPiping
RPC-1.5FSR
RPC-2.0FSR f12.7 (1/2) f6.35 (1/4)
RPC-2.5FSR
RPC-3.0FSR
RPC-4.0FSR
RPC-5.0FSR
RPC-6.0FSR
f15.88 (5/8) f9.52 (3/8)
Fortherefrigerantpipingwork,vacuumpumpandrefrigerantcharge,thedetailsshallbereferredto
“Installation&MaintenanceManual”oftheoutdoorunit.
This machine uses refrigerant R410A or refrigerant R32.
The type of enclosed refrigerant is described in the specication nameplate and caution nameplate
attached to the outdoor unit. When installing, repairing, or relocating, do not mix substances other
than the refrigerant described on the specication nameplate or caution nameplate attached to
the outdoor unit. Also, do not mix refrigerant R410A and refrigerant R32. Entering non-designated
refrigerants, air, oxygen, ammable substances such as propane or alcohol may cause explosion,
re or injury.
When installing pipe through
the wall, secure a cap at the
end of the pipe.
Correct CorrectIncorrect Incorrect
Correct Incorrect
HoleHole
Attach a cap
or vinyl tape.
Attach a cap
or vinyl tape.
Attach a cap
or vinyl bag with
rubber band.
Do not place the pipe
directly on the ground.
Rain water
can enter.