Fujitsu AOU18RGLX Installation guide

AIR CONDITIONER

PART No. 9374995592-02

English

OUTDOOR UNIT

FrançaisEspañol

APPAREIL EXTÉRIEUR

UNIDAD EXTERIOR

INSTALLATION MANUAL

For authorized service personnel only.

MANUEL D’INSTALLATION

MANUAL DE INSTALACIÓN

Pour le personnel d’entretien autorisé uniquement.

Únicamente para personal de servicio autorizado.

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1.2. Special precautions

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A

QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

• Donotsupplypowertotheunituntilallwiringandtubingarecompletedorreconnected

and checked.

• Highly dangerous electrical voltagesare used in this system. Carefully refer to

thewiring diagramand these instructions whenwiring. Improper connections and

inadequateearthing(grounding)cancauseaccidentalinjuryordeath.

• Earth(Ground)theunitfollowinglocalelectricalcodes.

• Connectallwiringtightly.Loosewiringmaycauseoverheatingatconnectionpointsand

apossiblerehazard.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get apartner to

help,andbendyourkneeswhenliftingtoreducestrainonyourback.Sharpedgesorthin

aluminumnsontheairconditionercancutyourngers.

When Installing...

...In a Ceiling or Wall

Makesuretheceiling/wallisstrongenoughtoholdtheunit’sweight.Itmaybenecessary

toconstructastrongwoodormetalframetoprovideaddedsupport

...In a Room

Properly insulate any tubingrun inside aroom to prevent “sweating” thatcan cause

drippingandwaterdamagetowallsandoors.

...In Moist or Uneven Locations

Usearaisedconcretepadorconcreteblockstoprovideasolid,levelfoundationforthe

outdoorunit.Thispreventswaterdamageandabnormalvibration.

...In an Area with High Winds

Securelyanchortheoutdoorunitdownwithboltsandametalframe.

Provideasuitableairbafe.

...In a Snowy Area (for Heat Pump-type Systems)

Installtheoutdoorunitonaraisedplatformthatishigherthandriftingsnow.

When Connecting Refrigerant Tubing

• Keepalltubingrunsasshortaspossible.

• Usethearemethodforconnectingtubing.

• Applyrefrigerantlubricanttothematchingsurfacesoftheareanduniontubesbefore

connectingthem,thentightenthenutwithatorquewrenchforaleak-freeconnection.

• Checkcarefullyforleaksbeforeopeningtherefrigerantvalves.

NOTES:

Depending onthe system type, liquid and gas lines maybe either narrowor wide.

Therefore,toavoidconfusiontherefrigeranttubingforyourparticularmodelisspecied

aseither“small”or“large”ratherthanas“liquid”or“gas”.

When Servicing

• TurnthepowerOFFatthemaincircuitbreakerpanelbeforeopeningtheunittocheck

orrepairelectricalpartsandwiring.

• Keepyourngersandclothingawayfromanymovingparts.

• Cleanupthesiteafteryounish,rememberingtocheckthatnometalscrapsorbitsof

wiringhavebeenleftinsidetheunitbeingserviced.

• Afterinstallation,explaincorrectoperationtothecustomer,usingtheoperatingmanual.

WARNING

Nevertouchelectricalcomponentsimmediatelyafterthepowersupplyhasbeenturned

off.Electricalshockmayoccur.Afterturningoffthepower,alwayswait10minutesor

morebeforetouchingelectricalcomponents.

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

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

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

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

customertokeepthemonhandforfutureuse,suchasforrelocatingorrepairingthe

unit.

WARNING

• 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outdoorunitisinstalledin

disregardoftheinstructionsintheinstallation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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work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ruptureandeveninjury.

• Wheninstallingandrelocatingtheairconditioner,donotmixgasesotherthanthe

speciedrefrigerant(R410A)toentertherefrigerantcycle.

Ifairorothergasenterstherefrigerantcycle,thepressureinsidethecyclewillriseto

anabnormallyhighvalueandcauserupture,injury,etc.

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

Contents

1. SAFETYPRECAUTIONS ............................................................................................2

1.1. IMPORTANT!Pleasereadbeforestarting .........................................................2

1.2. Specialprecautions ............................................................................................2

2. ABOUT THIS PRODUCT.............................................................................................3

2.1. PrecautionsforusingR410Arefrigerant ............................................................3

2.2. SpecialtoolsforR410Arefrigerant ....................................................................3

2.3. Accessories ........................................................................................................3

2.4. Operatingrange .................................................................................................3

3. GENERALSPECIFICATION .......................................................................................4

3.1. Selectingcircuitbreakerandwiring ...................................................................4

3.2. Selectingthepipematerial .................................................................................4

3.3. Connection pipe requirement .............................................................................4

3.4. Additionalcharging .............................................................................................4

4. INSTALLATION WORK ............................................................................................... 4

4.1. Selectinganinstallationlocation ........................................................................4

4.2. Installation dimensions .......................................................................................4

4.3. Transportingtheunit ..........................................................................................5

4.4. Drain installation .................................................................................................6

4.5. Secure the unit ...................................................................................................6

5. PIPE INSTALLATION .................................................................................................. 6

5.1. Brazing ...............................................................................................................6

5.2. Flareconnection(pipeconnection) ....................................................................6

5.3. Sealingtest ........................................................................................................7

5.4. Vacuum process ................................................................................................7

5.5. Additionalcharge ...............................................................................................8

5.6. Gasleakageinspection ......................................................................................8

6. ELECTRICALWIRING ................................................................................................8

6.1. Notesforelectricalwiring ...................................................................................8

7. TEST RUN ...................................................................................................................9

8. PUMP DOWN ............................................................................................................10

1. SAFETY PRECAUTIONS

1.1. IMPORTANT! Please read before starting

Thisairconditioningsystemmeetsstrictsafetyandoperatingstandards.

Astheinstallerorserviceperson,itisanimportantpartofyourjobtoinstallorservicethe

systemsoitoperatessafelyandefciently.

For safe installation and trouble-free operation, you must:

• Carefullyreadthisinstructionbookletbeforebeginning.

• Followeachinstallationorrepairstepexactlyasshown.

• Observealllocal,state,andnationalelectricalcodes.

• Paycloseattentiontoallwarningandcautionnoticesgiveninthismanual.

WARNING:

Thissymbolreferstoahazardorunsafepracticewhichcanresultin

severepersonalinjuryordeath.

CAUTION:

Thissymbolreferstoahazardorunsafepracticewhichcanresultin

personalinjuryandthepotentialforproductorpropertydamage.

•Hazardalertingsymbols

: Electrical :Safety/alert

If Necessary, Get Help

Theseinstructionsareallyouneedformostinstallationsitesandmaintenanceconditions.

Ifyourequirehelpforaspecialproblem,contactoursales/serviceoutletoryourcertied

dealerforadditionalinstructions.

In Case of Improper Installation

Themanufacturershallinnowayberesponsibleforimproperinstallationormaintenance

service,includingfailuretofollowtheinstructionsinthisdocument.

INSTALLATION MANUAL

PART No. 9374995592-02

OUTDOOR UNIT

NOTES:Thismanualdescribeshowtoinstalltheairconditionerdescribedabove.

Handlingandinstallationshallonlybedonebyprofessionalsasoutlinedinthis

manual.

• Installation mustbe performed in accordance withthe requirement of NEC (National

ElectricalCode)andCEC(CanadianElectricalCode)byauthorizedpersonnelonly.

• Allproductsaremanufacturedtometricunitsandtolerances.UnitedStatescustomary

unitsareprovidedforreferenceonly.Incaseswhereexactdimensionsandtolerances

arerequired,alwaysrefertometricunits.

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- ModelsthatuserefrigerantR410Ahaveadifferentchargingportthreaddiameter

topreventerroneouschargingwithconventionalrefrigerant(R22)andforsafety.

Therefore,checkbeforehand.[ThechargingportthreaddiameterforR410Ais

1/2-20UNF.]

- Becarefulthatforeignmatter(oil,water,etc.)doesnotenterthepipingthanwith

refrigerantmodels.Also,whenstoringthepiping,securelysealtheopeningsby

pinching,taping,etc.

- 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

whererefrigerantcompositionisstable.

2.2. Special tools for R410A refrigerant

WARNING

ToinstallaunitthatusesR410Arefrigerant,usededicatedtoolsandpipingmaterials

thathavebeenmanufacturedspecificallyforR410Ause.Becausethepressureof

R410A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fire.

Tool name Changes

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

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.

Vacuum pump Aconventionalvacuumpumpcanbeusedbyinstallinga

vacuum pump adapter.

Gasleakagedetector SpecialgasleakagedetectorforHFCrefrigerantR410A.

2.3. 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

(Reversecyclemodelonly)

Drain cap

—

Thefollowingitemsarenecessarytoinstallthisairconditioner.(Theitemsarenot

includedwiththeairconditionerandmustbepurchasedseparately.)

Name

Connectionpipeassembly Decorative tape Saddle Tappingscrews

Connectioncable Vinyl tape Drain hose Sealant

Wall pipe Wall cap M10bold,nut

2.4. Operating range

Outdoor Cooling/Dry Mode Heating Mode

Temperature

-5to115°F

(-20to46°C)

-5to75°F

(-20to24°C)

• Ifoperatedatatemperaturebeyondthespeciedoperatingrange,aprotectioncircuit

maybeactivatedtostoptheoperationoftheunit.

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

availablelocallyasstandardparts.

Thismanualdescribesproperconnectionsusingsuchinstallationset.

• Ifthesupplycordisdamaged,itmustbereplacedbythemanufacturer,itsservice

agentorsimilarlyqualiedpersonsinordertoavoidahazard.

• Donotuseanextensioncable.

• 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.

• 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.)

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

pump or the unit.

• Useacleangaugemanifold,vacuumpumpandcharginghoseforR410Aexclusively.

• 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2-wayor

3-wayvalvesopen.Thismaycauseabnormalpressureintherefrigerationcyclethat

leadstoruptureandeveninjury.

• Disposeofthepackingmaterialssafely.Tearanddisposeoftheplasticpackingbags

sothatchildrencannotplaywiththem.Thereisthedangerofsuffocationifchildren

playwiththeoriginalplasticbags.

• 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.

• Toavoiddangerofsuffocation,keeptheplasticbagorthinlmusedasthepackaging

materialawayfromyoungchildren.

• CancerandReproductiveHarm-www.P65Warnings.ca.gov.

CAUTION

• 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installationinstructionsofthe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willbetransferredto

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

• Alwaysuseaseparatepowersupplylineprotectedbyacircuitbreakeroperatingon

allwireswithadistancebetweencontactof3mm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experiencedservice

technicianforrepairing.

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

techniciansfordisconnectionandinstallation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.

2. ABOUT THIS PRODUCT

2.1. Precautions for using R410A refrigerant

WARNING

• Donotintroduceanysubstanceotherthantheprescribedrefrigerantintothe

refrigerationcycle.Ifairenterstherefrigerationcycle,thepressureintherefrigeration

cyclewillbecomeabnormallyhighandcausethepipingtorupture.

• Ifthereisarefrigerantleak,makesurethatitdoesnotexceedtheconcentrationlimit.

Ifarefrigerantleakexceedstheconcentrationlimit,itcanleadtoaccidentssuchas

oxygenstarvation.

• Donottouchrefrigerantthathasleakedfromtherefrigerantpipeconnectionsorother

areas.Touchingtherefrigerantdirectlycancausefrostbite.

• Ifarefrigerantleakoccursduringoperation,immediatelyvacatethepremisesand

thoroughlyventilatethearea.Iftherefrigerantcomesincontactwithaame,it

producesatoxicgas.

• Thebasicinstallationworkproceduresarethesameasconventionalrefrigerant

models.

However,paycarefulattentiontothefollowingpoints:

- Sincetheworkingpressureis1.6timeshigherthanthatofconventionalrefrigerant

(R22)models,someofthepipingandinstallationandservicetoolsarespecial.(See

thetablebelow.)

Especially,whenreplacingaconventionalrefrigerant(R22)modelwithanew

refrigerantR410Amodel,alwaysreplacetheconventionalpipingandarenutswith

theR410Apipingandarenuts.

9374995592-02_IM.indb 3 11/28/2018 11:05:15

En-4

3. GENERAL SPECIFICATION

3.1. Selecting circuit breaker and wiring

CAUTION

• Besuretoinstallabreakerofthespeciedcapacity.

• Regulationofcablesandbreakerdiffersfromeachlocality,referinaccordancewith

local rules.

Voltage rating 1ø208/230V(60Hz)

Operating range 188-253V

Cable Cable size (AWG) Cable type Remark

Powersupply

cable

AWG16to14

Sheathed PVC

cable

2wire+Earth(Ground)

Connection

cable

AWG20to16

Sheathed PVC

cable

3wire+Earth(Ground)

Selectthecorrectcabletypeandsizeaccordingtothecountryorregion’sregulations.

CableLength:Limitvoltagedroptolessthan2%.Increasecablegaugeifvoltagedropis

2%ormore.

CAUTION

MODEL 18 24 30 36

MINIMUM CIRCUIT AMPACITY 18.3A 20.8 A 20.8 A 24.6 A

MAX.CKT.BKR.(MAXIMUMCIRCUITBREAKER) 20 A 30 A 30 A 30 A

• 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thenationalstandard.

• Installthedisconnectdevicewithacontactgapofatleast2/16in(3mm)inallpoles

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

• Installthecircuitbreakernearbytheunits.

3.2. Selecting the pipe material

CAUTION

• Donotuseexistingpipes.

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

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

water.

• It is necessary to use seamless copper pipes.

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

Itisdesirablethattheamountofresidualoilislessthan40mg/33ft(10m).

• 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R410A

incurspressurehigherthanwhenusingconventionalrefrigerant,itisnecessaryto

choose adequate materials.

NOTES:

Thicknessesofcopperpipesusedwith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 (R410A)

Pipe outside diameter [in (mm)] Thickness [in (mm)]

1/4(6.35) 0.032(0.80)

3/8(9.52) 0.032(0.80)

1/2(12.70) 0.032(0.80)

5/8(15.88) 0.039(1.00)

3/4(19.05) 0.047(1.20)

3.3. Connection pipe requirement

CAUTION

Ifthepipelengthsandheightdifferencesarenotkeptasshowninthetable,correct

operationcannotbeguaranteed.

Model

Diameter Pipe length

Maximum height

(between indoor

and outdoor)

Liquid Gas MAX. MIN.

1/4in(6.35mm)

1/2in(12.70mm)

165ft(50m) 17ft(5m) 98ft(30m)

3/8in(9.52mm)

5/8in(15.88mm)

165ft(50m) 17ft(5m) 98ft(30m)

3/8in(9.52mm)

5/8in(15.88mm)

165ft(50m) 17ft(5m) 98ft(30m)

3/8in(9.52mm)

5/8in(15.88mm)

165ft(50m) 17ft(5m) 98ft(30m)

3.4. Additional charging

Refrigerantsuitableforapipinglengthof66ft(20m)ischargedintheoutdoorunitatthe

factory.

Whenthepipingislongerthan66ft(20m),additionalchargingisnecessary.

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

Model Piping length

66 ft

(20 m)

98 ft

(30 m)

131 ft

(40 m)

165 ft

(50 m)

Rate

Additional charge

None

7 oz

(200g)

14oz

(400g)

1lb5oz

(600g)

0.22oz/ft

(20g)

24/30/36 None

14oz

(400g)

1lb12oz

(800g)

2lb10oz

(1200g)

0.43oz/ft

(40g)

CAUTION

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

ofwork.

4. INSTALLATION WORK

Makesuretoobtainthecustomer’sapprovalforselectingandinstallingtheoutdoorunit.

4.1. Selecting an installation location

WARNING

• Installataplacethatcanwithstandtheweightoftheoutdoorunitsandinstall

positivelysothattheunitswillnottoppleorfall.

• 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.

• 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.

• Donotinstallinanareathathasheatsources,vapors,ortheriskofleakageor

accumulationofammablegas.

• 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.

• Donotinstalltheunitwhereastrongwindblowsorwhereitisverydusty.

• Installtheunitwherekeepawaymorethan3mfromtheantennaofTVsetand

Radio.

• 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.

• Outdoorunitshouldbesettoaplacewherebothdrainageanditselfwillnotbe

affectedwhenheating.

• Formaintenancepurposes,donotburythepiping.

4.2. Installation dimensions

CAUTION

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

temperatureundercoolingoperationof95°F(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95°F(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.

• Installationmethodsnotshowninthefollowingexamplesarenotrecommended.

Performancemaydropsignicantly.

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4.2.1. Single outdoor unit installation

When the upward area is open [Unit:in(mm)]

(1)Obstaclesatrearonly

4(100)

or more

(2)Obstaclesatrearandsidesonly

10(250)

or more

12(300)

or more

4(100)

or more

(3)Obstaclesatfrontonly

24(600)

or more

(4)Obstaclesatfrontandrearonly

24(600)

or more

4(100)

or more

When an obstruction is present also in the upward area [Unit:in(mm)]

(1)Obstaclesatrearandaboveonly

12(300)

or more

Max.

20(500)

24(600)

or more

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

40(1000)

or more

4(100)

or more

10(250)

or more

20(500)

or more

Max.

20(500)

4.2.2. Multiple outdoor unit installation

• Provideatleast10in(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 upward area is open [Unit:in(mm)]

(1)Obstaclesatrearonly

12(300)

or more

10(250)ormore

(2)Obstaclesatfrontonly

60(1500)

or more



(250)



(3)Obstaclesatfrontandrearonly

20(500)ormore

60(1500)ormore



(250)



When an obstruction is present also in the upward area [Unit:in(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.

60(1500)

or more

20(500)

or more

10(250)

or more

10(250)

or more

Max.12(300)

60(1500)

or more

4.2.3. Outdoor units installation in multi row

[Unit:in(mm)]

(1)Singleparallelunitarrangement

6(150)ormore

24(600)ormore

40(1000)ormore

79(2000)ormore

(2)Multipleparallelunitarrangement

20(500)ormore

24(600)ormore

60(1500)ormore

10

(250)



119(3000)ormore

10

(250)



6(150)

60(1500)

or more

20(500)

or more

10(250)

or more

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50mmormore.

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

operationefciency.

4.3. 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

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4.4. 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32°F(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)

• Pleasesetuptheoutdoorunitinahighplaceandpleasedonotarrangetheframeof

installedstandunderthedrainport,becausethewaterdroppedfromthedrainport

repeatsfreezingandaccumulating,andmayblockthedrainport.

• Intheareawithheavysnowfall,iftheintakeandoutletofoutdoorunitisblockedwith

snow,itislikelytocauseofthebreakdown.Pleaseconstructacanopyandapedestal

orplacetheunitonahighstand(localcongured).

Bottom side

AIR

Draincapmountingplace

Drainpipemountingplace

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

drainpipeandconnectittoacommercial5/8in(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Draincap(accessories)sothereisnowater

leakage.(Reversecyclemodelonly)

Drainpipemountinghole

Drainpipe(accessory)

Base

4.5. Secure the unit

WARNING

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

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

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

[Unit:in(mm)]

5-3/16

(132)

AIR

25-9/16

(650)

4-11/16

(119)

1-15/16

(50)

1-15/16

(50)

5/8(16)

14-9/16(370)

4-Φ12Hole

• 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2in(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13/16in(20mm).

(Refertothegurebelow.)

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

items.

Fixsecurelywithboltsonasolidblock.

Bolt

13/16in

(20mm)

Nut

Base

50 mm or more

5. PIPE INSTALLATION

5.1. 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.

5.2. Flare connection (pipe connection)

5.2.1. Flaring

UsespecialpipecutterandaretoolexclusiveforR410A.

(1) Cuttheconnectionpipetothenecessarylengthwithapipecutter.

(2) Holdthepipedownwardsothatthecuttingswillnotenterthepipeandremoveany

burrs.

(3) Insertthearenut(alwaysusethearenutattachedtotheindoorandoutdoor

unitsrespectively)ontothepipeandperformtheareprocessingwithaaretool.

Leakageofrefrigerantmayresultifotherarenutsareused.

(4) Protectthepipesbypinchingthemorwithtapetopreventdust,dirt,orwaterfrom

enteringthepipes.

Checkif[L]isareduniformly

and is not cracked or scratched.

Pipe

Die

Pipe outside diameter

[in (mm)]

Dimension A [in (mm)]

Dimension B [in (mm)]

Flare tool for R410A,

clutch type

1/4(6.35)

0 to 0.020

(0to0.5)

3/8(9.1)

3/8(9.52)

1/2(13.2)

1/2(12.70)

5/8(16.6)

5/8(15.88)

3/4(19.7)

3/4(19.05)

15/16(24.0)

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Whenusing conventional are toolsto are R410A pipes,the dimensionA should be

approximately0.020in(0.5mm)morethanindicatedinthetable(foraringwithR410A

flare tools)to achieve the specified flaring. Use a thickness gauge to measurethe

dimension A.

Width across

flats

oss

Pipe outside

diameter [in (mm)]

Width across ats of

Flare nut [in (mm)]

1/4(6.35)

11/16(17)

3/8(9.52)

7/8(22)

1/2(12.70)

1(26)

5/8(15.88)

1-1/8(29)

3/4(19.05)

1-7/16(36)

5.2.2. Bending pipes

CAUTION

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

curvatureof3-15/16in(100mm)to5-14/16in(150mm).

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

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

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

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

tobendorstretchthemanymore.

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

5.2.3. Pipe connection

CAUTION

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

correctly.Ifthecenteringisimproper,thearenutcannotbetightenedsmoothly.If

thearenutisforcedtoturn,thethreadswillbedamaged.

• Donotremovethearenutfromtheoutdoorunitpipeuntilimmediatelybefore

connectingtheconnectionpipe.

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

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

vibrateandproducenoise.

(1) Servicecoverremoval

 • Removethetwomountingscrews.

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

Hook

(3places)

Directionof

the service

panel removal

Service cover

(2) Valve cover removal.

 • Removetheonemountingscrew.

 • Removethevalvecoverbyslidingupward.

Valve cover

Hook(4places)

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

procuredatthesite)tothewallpipe.

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

(5) Aftermatchingthecenterofthearesurfaceandtighteningthenuthandtight,

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

2-wayor3-wayvalves

(liquid)

Flare nut

Connection pipe

(liquid)

Connection pipe

(gas)

Flare nut

3-wayvalve

(gas)

CAUTION

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

tightenthearenutcorrectly.

Torquewrench

Flare nut

Connection pipe

(liquid)

Flare nut

Connection pipe

Holding

spanner

90°

Topreventgasleakage,coat the

aresurfacewithrefrigeratoroil.

Flare nut [in (mm)] Tightening torque [ft·lb (N·m)]

1/4(6.35)dia. 12to13(16to18)

3/8(9.52)dia. 24to31(32to42)

1/2(12.70)dia. 36to45(49to61)

5/8(15.88)dia. 46to55(63to75)

3/4(19.05)dia. 66to81(90to110)

5.3. 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.

• 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41°F(5°C),thetestpressurechanges

0.05MPa.Ifthepressurehasdropped,thepipejointsmaybeleaking.

• Ifaleakisfound,immediatelyrepairitandperformthesealingtestagain.

• Aftercompletingthesealingtest,releasethenitrogengasfrombothvalves.

• Releasethenitrogengasslowly.

5.4. Vacuum process

CAUTION

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

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

thenameplate.)

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

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

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

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

affecttheoperationoftheunit.

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

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

usewith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.

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

chargingvalvebytheservicehoses.

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

indicates-0.1MPa(-76cmHg).

(3) When-0.1MPa(-76cmHg)isreached,operatethevacuumpumpforatleast

60 minutes.

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

torque.

(5) Removetheblankcaps,andfullyopenthespindlesofthe3-way(Liquid)and3-way

(Gas)valveswithahexagonwrench.

(6) Tightentheblankcapsofthe3-way(Liquid)valveand3-way(Gas)valvetothe

speciedtorque.

Tightening torque

Blank

cap

1/4in(6.35mm) 15to18ft·lb(20to25N·m)

3/8in(9.52mm) 15to18ft·lb(20to25N·m)

1/2in(12.70mm) 21to24ft·lb(28to32N·m)

5/8in(15.88mm) 22to26ft·lb(30to35N·m)

Charging port cap (R410A) 9to12ft·lb(12.5to16N·m)

Blank cap

Chargingport

Cap

Service hose

withvalvecore

Outdoor unit

3-wayvalve

Connectingpipe

Hexagonwrench

Usea3/6in(4mm)

hexagonwrench.

Service hose

Gaugemanifold

Vacuum pump

CAUTION

Useacleangaugemanifold

andcharginghoseforR410A

exclusively.

5.5. Additional charge

CAUTION

• Whenmovingandinstallingtheairconditioner,donotmixgasotherthanthespecied

refrigerantR410Ainsidetherefrigerantcycle.

• WhenchargingtherefrigerantR410A,alwaysuseanelectronicbalanceforrefrigerant

charging(tomeasuretherefrigerantbyweight).

• 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.

• Addrefrigerantfromthechargingvalveafterthecompletion

ofthework.

• Iftheunitsarefurtherapartthanthemaximumpipelength,

correctoperationcannotbeguaranteed.

R410A

Liquid

Gas

5.6. Gas leakage inspection

CAUTION

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

• Wheninspectinggasleakage,alwaysusethevacuumpumpforpressure.Donotuse

nitrogengas.

6. ELECTRICAL WIRING

6.1. Notes for electrical wiring

WARNING

• Wiringconnectionsmustbeperformedbyaqualiedpersoninaccordancewiththe

specications.Thevoltageratingforthisproductis208-230Vat60Hz.Itshouldbe

operatedwithintherangeof188to253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1/8in(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type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connection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

panel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.

• Connectioncablebetweenindoorunitandoutdoorunitis208-230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connection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.

• Whenconnectingthepowersupplycable,makesurethatthephaseofthepower

supplymatcheswiththephaseoftheterminalboard.Ifthephasesdonotmatch,the

compressorwillrotateinreverseandwillnotbeabletocompress.

(1) Servicecoverremoval

 • Removethetwomountingscrews.

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

Hook

(3places)

Directionof

the service

panel removal

Service cover

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CAUTION

• Besuretocomplywithlocalcodeswhilerunningthewirefromtheindoorunittothe

outdoorunit(sizeofwireandwiringmethod,etc.).

• Everywiremustbeconnectedrmly.

• Nowireshouldbeallowedtotouchrefrigeranttubing,thecompressororanymoving

part.

• Loosewiringmaycausetheterminaltooverheatorresultinunitmalfunction.Are

hazardmayalsoexist.Therefore,besureallwiringistightlyconnected.

• Connectwirestothematchingnumbersofterminals.

Indoor unit

side terminal

Outdoor unit

side terminal

Disconnectswitch

(Locallypurchased)

Earthing(Grounding)line

Powerlines

Control line

230/208V

EARTH

(GROUND)

EARTH

(GROUND)

EARTH

(GROUND)

Single-phase,230/208V

Powersupplyline

NOTES:

Factoryinstalledprotectiveinlinefusesforindoorunits’conductorsareinstalledonthe

PowerSupplyPCB.

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:3/8in

(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 [lb·in (N·m)]

M4screw 11to16(1.2to1.8)

M5screw 17to25(2.0to3.0)

7. TEST RUN

Make a TEST RUN in accordance with installation manual for the indoor unit.

CHECK ITEMS

INDOOR UNIT

Forcheckitemsrefertotheinstallationmanualfortheindoorunit.

OUTDOOR UNIT

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

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

(3) Isthereanygasleakage?

CAUTION

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

compressor protection.

(2) Fastenthepowersupplycableandtheconnectioncabletotheconduitholderusing

the lock nut.

 (opentheknockoutholesifnecessary)

Lock

nut

Inter-unit line

Powersupply

Keeptheearthwirelongerthantheotherwires.

1-3/16”



(30



mm)

Powersupplycable

orconnectioncable

Earthwire

1-9/16”



(40

mm)



or more

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

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

Controlbox

Terminal

Powersupplycable

Connectioncable

(indoorunitandoutdoor

unitconnectioncable)

Cableclamp

WARNING

• Disconnectswitchforovercurrentprotectiongiveninthetablebelowistobeinstalled

betweentheindoorunitandtheoutdoorunit.

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

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

unit.

• Matchtheterminalblocknumbersandconnectioncablecolorswiththoseofthe

outdoorunit.Erroneouswiringmaycauseburningoftheelectricparts.

• Connecttheconnectioncablesrmlytotheterminalblock.Imperfectinstallationmay

causeare.

• Alwaysfastentheoutsidecoveringoftheconnectioncablewiththecableclamp.(If

theinsulatorischafed,electricleakagemayoccur.)

• Securelyearththepowercableplug.

• Donotusetheearthscrewforanexternalconnector.Onlyuseforinterconnection

betweentwounits.

Disconnectswitch

20A

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8. PUMP DOWN

PUMP DOWN OPERATION (FORCED COOLING OPERATION)

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

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

procedure.

(1) Conductpreliminaryoperationfor5to10minutesusingthetestrunoperation.

Fortestrunoperationrefertotheinstallationmanualfortheindoorunit.

(2) Closethevalvestemof2-wayvalvecompletely.

(3) Continuethetestrunoperationfor2to3minutes,thencloseallthevalvestemson

the3-wayvalves.

(4) Stoptheoperation.

•PresstheSTART/STOPbuttonoftheremotecontrollertostoptheoperation.

CAUTION

• 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.

• Duringthepumpdownoperation,besuretoturnoffthecompressorbeforeremoving

therefrigerantpiping.

9374995592-02_IM.indb 10 11/28/2018 11:05:23

Fujitsu AOU18RGLX, AOU24RGLX, AOU30RGLX, AOU36RGLX Installation guide

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