EnglishInstallation manualR410A Split series

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INSTALLATION MANUALR410A Split Series

ModelRXS24LVJU

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1■English

Safety Precautions•ReadtheseSafetyPrecautionscarefullytoensurecorrectinstallation.•ThismanualclassifiestheprecautionsintoDANGER,WARNINGandCAUTION.Besuretofollowalltheprecautionsbelow:theyareallimportantforensuringsafety.

DANGER ...... Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING .... Failure to follow any of WARNING is likely to result in such grave consequences as death or serious injury.

CAUTION ..... Failure to follow any of CAUTION may in some cases result in grave consequences.

•Thefollowingsafetysymbolsareusedthroughoutthismanual:

Besuretoobservethisinstruction. Besuretoestablishagroundconnection. Neverattempt.

•Aftercompletinginstallation,testtheunittocheckforinstallationerrors.GivetheuseradequateinstructionsconcerningtheuseandcleaningoftheunitaccordingtotheOperationManual.

DANGER•Refrigerantgasisheavierthanairandreplacesoxygen.Amassiveleakcouldleadtooxygendepletion,especiallyinbasements,andanasphyxiationhazardcouldoccurleadingtoseriousinjuryordeath.

•Iftherefrigerantgasleaksduringinstallation,ventilatetheareaimmediately.Refrigerantgasmayproduceatoxicgasifitcomesincontactwithfiresuchasfromafanheater,stoveorcookingdevice.Exposuretothisgascouldcausesevereinjuryordeath.

•Aftercompletingtheinstallationwork,checkthattherefrigerantgasdoesnotleak.Refrigerantgasmayproduceatoxicgasifitcomesincontactwithfiresuchasfromafanheater,stoveorcookingdevice.Exposuretothisgascouldcausesevereinjuryordeath.

•Donotgroundunitstowaterpipes,telephonewiresorlightningrodsbecauseincompletegroundingcouldcauseasevereshockhazardresultinginsevereinjuryordeath,andtogaspipesbecauseagasleakcouldresultinanexplosionwhichcouldleadtosevereinjuryordeath.

•Safelydisposeofthepackingmaterials.Packingmaterials,suchasnailsandothermetalorwoodenparts,maycausestabsorotherinjuries.Tearapartandthrowawayplasticpackagingbagssothatchildrenwillnotplaywiththem.Childrenplayingwithplasticbagsfacethedangerofdeathbysuffocation.

•Donotinstallunitinanareawhereflammablematerialsarepresentduetoriskofexplosionresultinginseriousinjuryordeath.

•Donotgroundunitstotelephonewiresorlightningrodsbecauselightningstrikescouldcauseasevereshockhazardresultinginsevereinjuryordeath,andtogaspipesbecauseagasleakcouldresultinanexplosionwhichcouldleadtosevereinjuryordeath.

WARNING•Installationshallbelefttotheauthorizeddealeroranothertrainedprofessional.Improperinstallationmaycausewaterleakage,electricalshock,fire,orequipmentdamage.

•Installtheairconditioneraccordingtotheinstructionsgiveninthismanual.Incompleteinstallationmaycausewaterleakage,electricalshock,fireorequipmentdamage.

•Besuretousethesuppliedorexactspecifiedinstallationparts.Useofotherpartsmaycausetheunittocometofall,waterleakage,electricalshock,fireorequipmentdamage.

•Installtheairconditioneronasolidbasethatislevelandcansupporttheweightoftheunit.Aninadequatebaseorincompleteinstallationmaycauseinjuryorequipmentdamageintheeventtheunitfallsoffthebaseorcomesloose.

•Electricalworkshallbecarriedoutinaccordancewiththeinstallationmanualandthenational,stateandlocalelectricalwiringcodes.Insufficientcapacityorincompleteelectricalworkmaycauseelectricalshock,fireorequipmentdamage.

•Besuretouseadedicatedpowercircuit.Neveruseapowersupplysharedbyanotherappliance.Followallappropriateelectricalcodes.

•Forwiring,useawireorcablelongenoughtocovertheentiredistancewithnosplicesifpossible.Donotuseanextensioncord.Donotputotherloadsonthepowersupply.Useanonlyaseparatededicatedpowercircuit.(Failuretodosomaycauseabnormalheat,electricshock,fireorequipmentdamage.)

•Usethespecifiedtypesofwiresforelectricalconnectionsbetweentheindoorandoutdoorunits.Followallstateandlocalelectricalcodes.Firmlyclamptheinter-unitwiresotheirterminalsreceivenoexternalstresses.Incompleteconnectionsorclampingmaycauseterminaloverheating,fireorequipmentdamage.

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Safety Precautions WARNING

•Afterconnectingallwiresbesuretoshapethecablessothattheydonotputunduestressontheelectricalcovers,panelsorterminals.Installcoversoverthewires.Incompletecoverinstallationmaycauseterminaloverheating,electricalshock,fireorequipmentdamage.

•Wheninstallingorrelocatingthesystem,besuretokeeptherefrigerantcircuitfreefromallsubstancesotherthanthespecifiedrefrigerant(R410A),suchasair.(Anypresenceofairorotherforeignsubstanceintherefrigerantcircuitcausesanabnormalpressurerisewhichmayresultinrupture,resultingininjury.)

•Duringpump-down,stopthecompressorbeforeremovingtherefrigerantpiping.Ifthecompressorisstillrunningandthestopvalveisopenduringpump-down,airwillbesuckedinwhentherefrigerantpipingisremoved,causingabnormallyhighpressurewhichcouldleadtoequipmentdamageorandpersonalinjury.

•Duringinstallation,attachtherefrigerantpipingsecurelybeforerunningthecompressor.Iftherefrigerantpipesarenotattachedandthestopvalveisopenduringinstallation,airwillbesuckedinwhenthecompressorisrun,causingabnormallyhighpressurewhichcouldleadtoequipmentdamageandpersonalinjury.

•Besuretoinstallagroundfaultcircuitinterrupterbreaker.Failuretoinstallagroundfaultcircuitinterrupterbreakermayresultinelectricallyshocks,orfirepersonalinjury.

CAUTION•Donotinstalltheairconditionerwheregasleakagewouldbeexposedtoopenflames.Ifthegasleaksandbuildsuparoundtheunit,itmaycatchfire.

•Establishdrainpipingaccordingtotheinstructionsofthismanual.Inadequatepipingmaycausewaterdamage.

•Tightentheflarenutaccordingtothespecifiedtorque.Atorquewrenchshouldbeused.Iftheflarenutistightenedtoomuch,theflarenutmaycrackovertimeandcauserefrigerantleakage.

•Donottouchtheheatexchangerfins.Improperhandlingmayresultininjury.

•Beverycarefulaboutproducttransportation.SomeproductsusePPbandsforpackaging.DonotuseanyPPbandsforameansoftransportation.Itisdangerous.

•Makesuretoprovideforadequatemeasuresinordertopreventthattheoutdoorunitbeusedasashelterbysmallanimals.Smallanimalsmakingcontactwithelectricalpartscancausemalfunctions,smokeorfire.Pleaseinstructthecustomertokeeptheareaaroundtheunitclean.

•Thetemperatureofrefrigerantcircuitwillbehigh,pleasekeeptheinter-unitwireawayfromcopperpipesthatarenotthermallyinsulated.

•ElectricalworkmustbeperformedinaccordancewiththeNEC/CECbyauthorizedpersonnelonly.

AccessoriesAccessoriessuppliedwiththeoutdoorunit:

Installationmanual 1 Drainsocketassembly

1 Tube 2

Bindingband 2

A B

C

D

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Precautions for Selecting the Location1) Chooseaplacesolidenoughtobeartheweightandvibrationoftheunit,wheretheoperationsoundswillnotbeamplified.2) Choosealocationwherethehotairdischargedfromtheunitortheoperationsoundswillnotdisturbtheneighborsoftheuser.3) Avoidinstallingnearbedroomssothatoperationsoundswillnotbeaproblem.4) Theremustbesufficientspaceforcarryingtheunitintoandoutofthesite.5) Theremustbesufficientspaceforairpassageandnoobstructionsaroundtheairinletandtheairoutlet.6) Thesitemustbefreefromthepossibilityofflammablegasleakageinanearbyplace.7) Installunits,powercordsandinter-unitwireatleast10ft(3m)awayfromtelevisionandradiosets.Thisistopreventinterference

toimagesandsounds.(Noisesmaybeheardeveniftheyaremorethan10ft(3m)awaydependingonradiowaveconditions.)8) Incoastalareasorotherplaceswithsaltyatmosphereofsulfategas,corrosionmayshortenthelifeoftheairconditioner.9) Sincedrainflowsoutoftheoutdoorunit,donotplaceanythingundertheunitwhichmustbekeptawayfrommoisture.

NOTECannotbeinstalledhangingfromceilingorstacked.

CAUTIONWhenoperatingtheairconditionerinalowoutdoorambienttemperature,besuretofollowtheinstructionsdescribedbelow.•Topreventexposuretowind,installtheoutdoorunitwithitssuctionsidefacingthewall.

•Neverinstalltheoutdoorunitatasitewherethesuctionsidemaybeexposeddirectlytowind.

•Topreventexposuretowind,itisrecommendedtoinstallabaffleplateontheairdischargesideoftheoutdoorunit.

•Inheavysnowfallareas,selectaninstallationsitewherethesnowwillnotaffecttheunit.

Construct a large canopy.Construct a pedestal.

Install the unit high enough off the ground to prevent burying in snow.

Precautions on Installation•Checkthestrengthandleveloftheinstallationgroundsothattheunitwillnotcauseanyoperatingvibrationornoiseafterinstalled.•Inaccordancewiththefoundationdrawing,fixtheunitsecurelybymeansofthefoundationbolts.(Prepare4setsof5/16or3/8inch(M8orM10)foundationbolts,nutsandwasherseachwhichareavailableonthemarket.)

•Itisbesttoscrewinthefoundationboltsuntiltheirendsare3/4inch(20mm)fromthefoundationsurface.

3/4

inch

(2

0mm

)

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Outdoor Unit Installation Drawings

Max. allowable piping height

Min. allowable piping length

Max. allowable piping length 98.4ft (30m)

4.92ft (1.5m)

65.6ft (20m)

Liquid pipe

Gas pipe

O.D. 1/4 inch (6.4mm)

O.D. 5/8 inch (15.9mm)

0.21oz/ft (20g/m)

Additional refrigerant required for refrigerant pipe exceeding 32.8ft (10m) in length.

**

*

* Be sure to add the proper amount of additional refrigerant. Failure to do so may result in reduced performance.

** The suggested shortest pipe length is 4.92ft (1.5m), in order to avoid noise from the outdoor unit and vibration. (Mechanical noise and vibration may occur depending on how the unit is installed and the environment in which it is used.)

Wrap the insulation pipe with the finishing tape from bottom to top.

Allow 11-13/16 inch (300mm) of work space below the ceiling surface.

9-7/8 (250) from wallAllow space for piping and electrical servicing.

Right side plate

13-3/4

(350)

Clamping material

Insulation tube

Bottom frameTape

Also insulate the connection on the outdoor unit.

Use tape or insulating material on all connections to prevent air from getting in between the copper piping and the insulation tube.Be sure to do this if the outdoor unit is installed above.

(Foot bolt-h

ole

centers)

(Foot bolt-hole centers)

24-7/16(620)

Level mounting base (available separately)

If there is the danger of the unit falling or overturning, fix the unit with foundation bolts, or with wire or other means.

If the location does not have good drainage, place the unit on a level mounting base (or a plastic pedestal). Install the outdoor unit in a level position. Failure to do so may result in water leakage or accumulation.

CAUTION** Set the piping length from 4.92ft (1.5m) to 98.4ft (30m).

unit : inch (mm)

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Installation Guidelines •Whereawallorotherobstacleisinthepathofoutdoorunit’sinletoroutletairflow,followtheinstallationguidelinesbelow.•Foranyofthebelowinstallationpatterns,thewallheightontheoutletsideshouldbe47-1/4inch(1200mm)orless.

More than 3-15/16 (100)

More than 13-3/4 (350)

Side view

47-1/4(1200)or less

More than 1-15/16 (50)

More than 1-15/16 (50)

More than 13-3/4 (350)

Top view

More than 3-15/16 (100)

unit: inch (mm)

Wall facing one side Walls facing two sides

Top view

More than 3-15/16 (100)

More than 13-3/4 (350)More than

1-15/16 (50)

Walls facing three sides

Outdoor Unit Installation1. Installing outdoor unit

1) Wheninstallingtheoutdoorunit,referto“PrecautionsforSelectingtheLocation”andthe“OutdoorUnitInstallationDrawings”.2) Ifdrainworkisnecessary,followtheproceduresbelow.

2. Drain work•Usedrainplugfordrainage.•Ifthedrainportiscoveredbyamountingbaseorfloorsurface,placeadditionalfootbasesofatleast3-15/16inch(100mm)inheightundertheoutdoorunit’sfeet.

•Incoldareas,donotuseadrainsocket(A),draincaps(B)andadrainhosewiththeoutdoorunit.(Otherwise,drainwatermayfreeze,impairingheatingperformance.)

1) Insertdrainreceiver(C)ontodrainsocket(A)anddraincap(B)beyond4projectionsarounddrainsocketanddraincap.

2) Insertdrainsocketanddraincapsintotheirmatchingdrainhole;Drainsocket(A)intodrainholeIanddraincaps(B)intodrainholeIIandIII.Afterinsertion,turnthemabout40°clockwise.

Projections Projections

(C) Drain receiver

(A) Drain socket (B) Drain cap

III

III

(Besurenottoinsertthemintowrongdrainholes,ortherecauseswaterleakage.)

(Viewfrombottom)

NOTECheckthatthedrainreceiver(C)iscorrectlyengagedwiththeprojectionsofthedrainsocket(A)anddraincap(B).Otherwise,waterleakagemayresult.

Projections (4 points)

Projections (4 points)

3) Connectvinylhoseonthemarket(internaldiameterof1inch(25mm))todrainsocket(A).(Ifthehoseistoolongandhangsdown,fixitcarefullytopreventthekinks.)

4) MakesurethatthereisnowaterleakagefromportionI,II,orIII.

NOTEIfthedrainholesoftheoutdoorunitarecoveredwiththemountingbracketorthefloor,raisetheunittoprovidethespaceofmorethan3-15/16inch(100mm)underthelegoftheoutdoorunit.

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Outdoor Unit Installation3. Flaring the pipe end

1) Cutthepipeendwithapipecutter.2) Removeburrswiththecutsurfacefacing

downwardsothatthechipsdonotenterthepipe.3) Puttheflarenutonthepipe.4) Flarethepipe.5) Checkthattheflaringisproperlymade.

WARNING•Donotusemineraloilonflaredpart.•Preventmineraloilfromgettingintothesystemasthiswouldreducethelifetimeoftheunits.•Neverusepipingwhichhasbeenusedforpreviousinstallations.Onlyusepartswhicharedeliveredwiththeunit.•NeverinstalladriertothisR410Aunitinordertoguaranteeitslifetime.•Thedryingmaterialmaydissolveanddamagethesystem.•Incompleteflaringmaycauserefrigerantgasleakage.

4. Refrigerant piping

CAUTION•Usetheflarenutfixedtothemainunittopreventitfromcrackinganddeterioratingfromage.•Topreventgasleakage,applyrefrigerationoilonlytotheinnersurfaceoftheflare.(UserefrigerationoilforR410A.)•Usetorquewrencheswhentighteningtheflarenutstopreventdamagetotheflarenutsandgasleakage.

Flare nut tightening torque

Liquid side

1/4 inch (6.4mm)

10.4-12.7ft • lbf

(14.2-17.2N • m)

Gas side

5/8 inch (15.9mm)

45.6-55.6ft • lbf

(61.8-75.4N • m)

Valve cap tightening torque

Liquid side

1/4 inch (6.4mm)

15.9-20.2ft • lbf

(21.6-27.4N • m)

Gas side

5/8 inch (15.9mm)

35.5-44.0ft • lbf

(48.1-59.7N • m)

Service port cap tightening torque

Do not apply refrigeration

oil to the outer surface.

Flare nut

Apply refrigeration oil to

the inner surface of the

flare.

Do not apply refrigeration oil to

the flare nut to avoid tightening

with excessive torque.

[Apply oil]• Align the centers of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torque wrenches.

7.9-10.8ft • lbf

(10.8-14.7N • m)

(Cut exactly at right angles.) Remove burrs.

Set exactly at the position shown below.

A

Flaring

Die

Check

Flare’s inner surface must be flaw-free.

The pipe end must be evenly flared in a perfect circle.

Make sure that the flare nut is fitted.

A 0-0.020 inch (0-0.5mm)

Clutch-type

Flare tool for R410A

0.039-0.059 inch (1.0-1.5mm)

Clutch-type (Rigid-type)

0.059-0.079 inch (1.5-2.0mm)

Wing-nut type (Imperial-type)

Conventional flare tool

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5. Purging air and checking gas leakage

WARNING•Donotmixanysubstanceotherthanthespecifiedrefrigerant(R410A)intotherefrigerationcycle.•Whenrefrigerantgasleaksoccur,ventilatetheroomassoonandasmuchaspossible.•R410A,aswellasotherrefrigerants,shouldalwaysberecoveredandneverbereleaseddirectlyintotheenvironment.•UseavacuumpumpforR410Aexclusively.Usingthesamevacuumpumpfordifferentrefrigerantsmaydamagethevacuumpumportheunit.

•Whenpipingworkiscompleted,itisnecessarytopurgetheairandcheckforgasleakage.

•Ifusingadditionalrefrigerant,performairpurgingfromtherefrigerantpipesandindoorunitusingavacuumpump,thenchargeadditionalrefrigerant.

•Useahexagonalwrench(3/16inch(4mm))tooperatethestopvalverod.•Allrefrigerantpipejointsshouldbetightenedwithatorquewrenchatthespecifiedtighteningtorque.

1) Connectprojectionsideofcharginghose(whichcomesfromgaugemanifold)togasstopvalve’sserviceport.

2) Fullyopengaugemanifold’slow-pressurevalve(Lo)andcompletelycloseitshigh-pressurevalve(Hi).(High-pressurevalvesubsequentlyrequiresnooperation.)

3) Dovacuumpumpingandmakesurethatthecompoundpressuregaugereads–29.9inHg(–0.1MPa).*1

4) Closegaugemanifold’slow-pressurevalve(Lo)andstopvacuumpump.(Keepthisstateforafewminutestomakesurethatthecompoundpressuregaugepointerdoesnotswingback.)*2

5) Removecapsfromliquidstopvalveandgasstopvalve.

6) Turntheliquidstopvalve’srod90degreescounterclockwisewithahexagonalwrenchtoopenvalve.Closeitafter5seconds,andcheckforgasleakage.Usingsoapywater,checkforgasleakagefromindoorunit’sflareandoutdoorunit’sflareandvalverods.Afterthecheckiscomplete,wipeallsoapywateroff.

7) Disconnectcharginghosefromgasstopvalve’sserviceport,thenfullyopenliquidandgasstopvalves.(Donotattempttoturnvalverodbeyonditsstop.)

8) Tightenvalvecapsandserviceportcapsfortheliquidandgasstopvalveswithatorquewrenchatthespecifiedtorques.

*1.Pipelengthvs.vacuumpumpruntime

Pipelength Upto49.2ft(15m) Morethan49.2ft(15m)

Runtime Notlessthan10min. Notlessthan15min

*2.Ifthecompoundpressuregaugepointerswingsback,refrigerantmayhavewatercontentoraloosepipejointmayexists.Checkallpipejointsandretightennutsasneeded,thenrepeatsteps2)through4).

Gauge manifold

Compound pressure gauge

Pressure meter

Low-pressure valve

High-pressure valve

Charging hoses

Vacuum pump

Valve caps

Service port

Liquid stop valve

Gas stop valve

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Outdoor Unit Installation6. Refilling the refrigerant

Checkthetypeofrefrigeranttobeusedonthemachinenameplate.Precautions when adding R410AFill from the gas pipe in liquid form.Itisamixedrefrigerant,soaddingitingasformmaycausetherefrigerantcompositiontochange,preventingnormaloperation.

1) Beforefilling,checkwhetherthecylinderhasasiphonattachedornot.(Itshouldhavesomethinglike“liquidfillingsiphonattached”displayedonit.)

Filling a cylinder with an attached siphon

Stand the cylinder upright when filling.

There is a siphon pipe inside, so the cylinder need not be upside-down to fill with liquid.

Filling other cylinders

Turn the cylinder upside-down when filling.

•BesuretousetheR410Atoolstoensurepressureandtopreventforeignobjectsentering.

7. Refrigerant piping work7-1 Caution on pipe handling

1) Protecttheopenendofthepipeagainstdustandmoisture.2) Allpipebendsshouldbeasgentleaspossible.Useapipebenderfor

bending.

7-2 Selection of copper and heat insulation materialsWhenusingcommercialcopperpipesandfittings,observethefollowing:1) Insulationmaterial:Polyethylenefoam

Heattransferrate:0.041to0.052W/mK(0.024to0.030Btu/fth°F(0.035to0.045kcal/mh°C))BesuretouseinsulationthatisdesignedforusewithHVACSystems.

2) Besuretoinsulateboththegasandliquidpipingandtoprovideinsulationdimensionsasbelow.

Gasside LiquidsideGaspipethermal

insulationLiquidpipethermal

insulationO.D.5/8inch(15.9mm)

O.D.1/4inch(6.4mm)

I.D.5/8-25/32inch(16-20mm)

I.D.5/16-13/32inch(8-10mm)

Minimumbendradius Thickness13/32inch(10mm)Min.1-15/16inch(50mm)

ormore1-3/16inch(30mm)

ormoreThickness

0.039inch(1.0mm)(C1220T-O)

Thickness0.031inch(0.8mm)

(C1220T-O)

•Useseparatethermalinsulationpipesforgasandliquidrefrigerantpipes.

Wall

If no flare cap is available, cover the flare mouth with tape to keep dirt or water out.

Be sure to place a cap.

Rain

Gas pipeLiquid pipe

Gas pipe insulation

Liquid pipe insulation

Finishing tape Drain hose

Inter-unit wire

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Pump Down OperationIn order to protect the environment, be sure to pump down when relocating or disposing of the unit.

1) Removethevalvecapfromliquidstopvalveandgasstopvalve.2) Carryoutforcedcoolingoperation.3) After5to10minutes,closetheliquidstopvalvewithahexagonalwrench.4) After2to3minutes,closethegasstopvalveandstopforcedcoolingoperation.

Forced cooling operation

■ Using the indoor unit ON/OFF switch

PresstheindoorunitON/OFFswitchforatleast5seconds.(Theoperationwillstart.)• Forcedcoolingoperationwillstopautomaticallyafteraround15minutes.

Tostoptheoperation,presstheindoorunitON/OFFswitch.

■ Using the indoor unit’s remote controller

1) Press“MODE”buttonandselectthecoolingmode.2) Press“ON/OFF”buttontoturnonthesystem.3) Pressbothof“TEMP”buttonand“MODE”buttonatthesametime.4) Press“MODE”buttontwice.( willbedisplayedandtheunitwillenterforcedcoolingoperation.)• Forcedcoolingoperationwillstopautomaticallyafteraround30minutes.

Tostoptheoperaion,press“ON/OFF”button.

Wiring WARNING

•Donotusetappedwires,strandedwires,extensioncords,orstarburstconnections,astheymaycauseoverheating,electricalshock,orfire.

•Donotuselocallypurchasedelectricalpartsinsidetheproduct.(Donotbranchthepowerforthedrainpump,etc.,fromtheterminalblock.)Doingsomaycauseelectricshockorfire.

•Besuretoinstallagroundfaultcircuitinterrupterbreaker.(Onethatcanhandlehigherharmonics.)(Thisunitusesaninverter,whichmeansthatitmustbeusedagroundfaultcircuitinterrupterbreakercapablehandlingharmonicsinordertopreventmalfunctioningofthegroundfaultcircuitinterrupterbreakeritself.)

•Useanall-poledisconnectiontypebreakerwithatleast1/8inch(3mm)betweenthecontactpointgaps.•Whencarryingoutwiringconnection,takecarenottopullattheconduit.•Donotconnectthepowerwiretotheindoorunit.Doingsomaycauseelectricshockorfire.

•Donotturnonthesafetybreakeruntilallworkiscompleted.

1) Striptheinsulationfromthewire(3/4inch(20mm)).

2) Connecttheconnectionwiresbetweentheindoorandoutdoorunitssothattheterminalnumbersmatch.Tightentheterminalscrewssecurely.Werecommendaflatheadscrewdriverbeusedtotightenthescrews.

Close

valve cap

Hexagonal wrench

Service port

Liquid stop valve

Gas stop valve

123

1 GR2 3

Safety breaker 20A

Ground faultcircuit interrupter

Ground

Firmly fix the wires with the terminal screws.

Outdoor unit

Indoor unit

Power supply60Hz 208-230V

L1 L2Use AWG16 if the connection wirelength is less than 32.8ft (10m), orAWG14 if it is 32.8ft (10m) or more. Use AWG 14 wires.

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Wiring<Methodofmountingconduit>

Passwiresthroughtheconduitandsecurethemwithalocknut.

Wire retainer

Conduit mounting plateService port

Lock nut

Conduit1/2 inch (21.3mm)

Conduit mounting plate

Tube(Accessory)

Binding band(Accessory)

Secure the wires firmly using the binding band, as shown in the figure. Secure firmly, making sure no outside pressure is exerted on the terminals.

Power supply terminal block

L1 L21 2 3

• Use the specified wires and connect them securely.

• Shape the wires so that there is no lifting of the service hatch or other structural parts.

D

C

Observethenotesmentionedfollowingwhenwiringtothepowersupplyterminalblock.Precautionstobetakenforpowersupplywiring.

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CAUTION•Whenconnectingtheconnectionwirestotheterminalblockusingasinglecorewire,besuretoperformcurling.Problemswiththeworkmaycauseheatandfires.

•Ifthestrandedwiresmustbeused,makesuretousetheroundcrimp-styleterminalforconnectiontothepowersupplyterminalblock.Placetheroundcrimp-styleterminalsonthewiresuptothecoveredpartandsecureinplace.

Stranded wire

Round crimp-styleterminal

•GroundterminalinstallationUsethefollowingmethodwheninstallingtheroundcrimp-styleterminal.

Good Wrong

Round crimp-style terminal

Flat washer

Screw

Flat washer

Round crimp-style terminal

Screw

3) Pullthewireandmakesurethatitdoesnotdisconnect.Thenfixthewireinplacewithawirestop.

Facility Setting (cooling at low outdoor temperature)This function is designed for facilities such as equipment or computer rooms. It is never to be used in a residence or office where people occupy the space.1) Youcanexpandtheoperationrangeto14°F(–10°C)byturningonswitchB(SW4)onthePCB.Iftheoutdoortemperaturefalls

to–0.4°F(–18°C)orlower,theoperationwillstop.Iftheoutdoortemperaturerises,theoperationwillstartagain.

LED-A

SW4ON

AB

CD

S102

SW1

S2

Turn on switch B.

CAUTION•Iftheoutdoorunitisinstalledwheretheheatexchangeroftheunitisexposedtodirectwind,provideawindbreakwall.•Intermittentnoisesmaybeproducedbytheindoorunitduetotheoutdoorfanturningonandoffwhenusingfacilitysettings.•Donotplacehumidifiersorotheritemswhichmightraisethehumidityinroomswherefacilitysettingsarebeingused.Ahumidifiermightcausedewcondensationfromtheindoorunitoutletvent.

•Usetheindoorunitatthehighestlevelofairflowrate.

Stripping wire at terminal block

Good Wrong

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Trial Operation and Testing1. Trial operation and testing

1-1Measurethesupplyvoltageandmakesurethatitfallsinthespecifiedrange.

1-2Trialoperationshouldbecarriedoutineithercoolingorheatingmode.

•Incoolingmode,selectthelowestprogrammabletemperature;inheatingmode,selectthehighestprogrammabletemperature.1) Trialoperationmaybedisabledineithermodedependingontheroomtemperature.2) Aftertrialoperationiscomplete,setthetemperaturetoanormallevel(78°Fto82°F(26°Cto28°C)incoolingmode,

68°Fto75°F(20°Cto24°C)inheatingmode).3) Forprotection,thesystemdisablesrestartoperationfor3minutesafteritisturnedoff.

1-3Carryoutthetestoperationinaccordancewiththeoperationmanualtoensurethatallfunctionsandparts,suchasfinmovement,areworkingproperly.•Theairconditionerrequiresasmallamountofpowerinitsstandbymode.Ifthesystemisnottobeusedforsometimeafterinstallation,shutoffthecircuitbreakertoeliminateunnecessarypowerconsumption.

•Ifthecircuitbreakertripstoshutoffthepowertotheairconditioner,thesystemwillrestoretheoriginaloperationmodewhenthecircuitbreakerisopenedagain.

2. Test itemsTestitems Symptom Check

Indoorandoutdoorunitsareinstalledproperlyonsolidbases. Fall,vibration,noise

Norefrigerantgasleaks.Incompletecooling/heatingfunction

Refrigerantgasandliquidpipesandindoordrainhoseextensionarethermallyinsulated.

Waterleakage

Draininglineisproperlyinstalled. Waterleakage

Systemisproperlygrounded. Electricalleakage

Thespecifiedwiresareusedforinter-unitwiring. Inoperativeorburndamage

Indoororoutdoorunit’sairinletorairoutlethasclearpathofair.Stopvalvesareopened.

Incompletecooling/heatingfunction

Indoorunitproperlyreceivesremotecontrolcommands. Inoperative

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3P300674-2B M11B135A (1209) HT

Two-dimensional bar code is a code for manufacturing.

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