En-1
TION
1. SAFETY PRECAUTIONS
• Besuretoreadthismanualthoroughlybeforeinstallation.
• Thewarningsandprecautionsindicatedinthismanualcontainimportantinformation
pertainingtoyoursafety.Besuretoobservethem.
• Handthismanual,togetherwiththeoperatingmanual,tothecustomer.Requestthe
customertokeepthemonhandforfutureuse,suchasforrelocatingorrepairingthe
unit.
WARNING
Thismarkindicatesprocedureswhich,ifimproperlyper-
formed,mightleadtothedeathorseriousinjuryoftheuser.
Requestyourdealeroraprofessionalinstallertoinstalltheindoorunitinaccordance
withthisinstallationmanual.Animproperlyinstalledunitcancauseseriousaccidents
suchaswaterleakage,electricshock,orre.Iftheindoorunitisinstalledindisregard
oftheinstructionsintheinstallationmanual,itwillvoidthemanufacturer’swarranty.
DonotturnONthepoweruntilallworkhasbeencompleted.TurningONthepowerbe-
foretheworkiscompletedcancauseseriousaccidentssuchaselectricshockorre.
Ifrefrigerantleakswhileworkisbeingcarriedout,ventilatethearea.Iftherefrigerant
comesincontactwithaame,itproducesatoxicgas.
Installationworkmustbeperformedinaccordancewithnationalwiringstandardsby
authorizedpersonnelonly.
Thisapplianceisnotintendedforusebypersons(includingchildren)withreduced
physical,sensoryormentalcapabilities,orlackofexperienceandknowledge,unless
theyhavebeengivensupervisionorinstructionconcerninguseoftheappliancebya
personresponsiblefortheirsafety.Childrenshouldbesupervisedtoensurethatthey
donotplaywiththeappliance.
CAUTION
Thismarkindicatesprocedureswhich,ifimproperly
performed,mightpossiblyresultinpersonalharmtotheuser,
ordamagetoproperty.
Readcarefullyallsecurityinformationbeforeuseorinstalltheairconditioner.
Donotattempttoinstalltheairconditionerorapartoftheairconditionerbyyourself.
Thisunitmustbeinstalledbyqualiedpersonnelwithacapacitycerticateforhandling
refrigerantuids.Refertoregulationandlawsinuseoninstallationplace.
Theinstallationmustbecarriedoutincompliancewithregulationsinforceintheplace
ofinstallationandtheinstallationinstructionsofthemanufacturer.
Thisunitispartofasetconstitutinganairconditioner.Itmustnotbeinstalledaloneor
withnon-authorizedbythemanufacturer.
Alwaysuseaseparatepowersupplylineprotectedbyacircuitbreakeroperatingonall
wireswithadistancebetweencontactof3mmforthisunit.
Contents
1. SAFETYPRECAUTIONS........................................................................................... 1
2. ABOUTTHEUNIT...................................................................................................... 1
3. GENERALSPECIFICATION...................................................................................... 2
4. ELECTRICALREQUIREMENT.................................................................................. 2
5. SELECTINGTHEMOUNTINGPOSITION................................................................ 3
6. INSTALLATIONWORK.............................................................................................. 3
7. ELECTRICALWIRING.............................................................................................. 6
8. FINISHING................................................................................................................. 7
9. FRONTPANELREMOVALANDINSTALLATION...................................................... 7
10. TESTRUN.................................................................................................................. 8
11. REMOTECONTROLLERINSTALLATION................................................................. 8
12. OPTIONALKITINSTALLATION(UTY-TWBXF)......................................................... 9
13. SELECTINGTHEREMOTECONTROLLERCUSTOMCODE............................... 10
14. FUNCTIONSETTING............................................................................................... 10
15. CUSTOMERGUIDANCE..........................................................................................11
16. ERRORCODES........................................................................................................11
Theunitmustbecorrectlygroundedandthesupplylinemustbeequippedwithadif-
ferentialbreakerinordertoprotectthepersons.
Theunitsarenotexplosionproofandthereforeshouldnotbeinstalledinexplosive
atmosphere.
Nevertouchelectricalcomponentsimmediatelyafterthepowersupplyhasbeen
turnedoff.Electricshockmayoccur.Afterturningoffthepower,alwayswait5minutes
beforetouchingelectricalcomponents.
Thisunitcontainsnouser-serviceableparts.Alwaysconsultauthorizedserviceperson-
neltorepairs.
Whenmoving,consultauthorizedservicepersonnelfordisconnectionandinstallation
oftheunit.
2. ABOUT THE UNIT
2.1. Precautions for using R410A refrigerant
Thebasicinstallationworkproceduresarethesameasconventionalrefrigerant(R22)
models.
However,paycarefulattentiontothefollowingpoints:
Sincetheworkingpressureis1.6timeshigherthanthatofconventionalrefrigerant
(R22)models,someofthepipingandinstallationandservicetoolsarespecial.(See
thetablebelow.)
Especially,whenreplacingaconventionalrefrigerant(R22)modelwithanewrefrigerant
R410Amodel,alwaysreplacetheconventionalpipingandflarenutswiththeR410Apiping
andarenuts.
ModelsthatuserefrigerantR410Ahaveadifferentchargingportthreaddiametertopre-
venterroneouschargingwithconventionalrefrigerant(R22)andforsafety.Therefore,
checkbeforehand.[ThechargingportthreaddiameterforR410Ais1/2-20UNF.]
Bemorecarefulthatforeignmatter(oil,water,etc.)doesnotenterthepipingthanwith
refrigerant(R22)models.Also,whenstoringthepiping,securelysealtheopeningby
pinching,taping,etc.
Whenchargingtherefrigerant,takeintoaccounttheslightchangeinthecompositionof
thegasandliquidphases.Andalwayschargefromtheliquidphasewhererefrigerant
compositionisstable.
2.2. Special tools for R410A
Tool name Contents of change
Gauge manifold
Pressureis high and cannot be measured with a conven-
tional (R22) gauge. To prevent erroneous mixing of other
refrigerants,thediameterofeachporthasbeenchanged.
It is recommended the gauge with seals -0.1 to 5.3 MPa
(-1to53bar)forhighpressure.
-0.1to3.8MPa(-1to38bar)forlowpressure.
Charge hose
Toincreasepressureresistance,thehosematerialandbase
sizewerechanged.
Vacuum pump
Aconventional vacuum pump can be used by installing a
vacuumpumpadapter.
Gas leakage detector SpecialgasleakagedetectorforHFCrefrigerantR410A.
Copper pipes
Itisnecessarytouseseamlesscopperpipesanditisdesirablethattheamountofresidual
oilislessthan40mg/10m.Donotusecopperpipeshavingacollapsed, deformed or
discoloredportion(especiallyonthe interiorsurface).Otherwise,theexpansionvalueor
capillarytubemaybecomeblockedwithcontaminants.
AsanairconditionerusingR410AincurspressurehigherthanwhenusingR22,itisneces-
sarytochooseadequatematerials.
WARNING
Donotusetheexisting(forR22)pipingandarenuts.
Iftheexistingmaterialsareused,thepressureinsidetherefrigerantcyclewillriseand
causefailure,injury,etc.(UsethespecialR410Amaterials.)
Wheninstallingandrelocatingtheairconditioner,donotmixgasesotherthanthe
speciedrefrigerant(R410A)toentertherefrigerantcycle.
Ifairorothergasenterstherefrigerantcycle,thepressureinsidethecyclewillriseto
anabnormallyhighvalueandcausefailure,injury,etc.
AIRCONDITIONER INSTALLATIONMANUAL
CompactWallMountedType
PARTNo.9319357003-05
[Originalinstructions]
• Branchboxwhichisspeciedinthismanualistheequipmenttosupporttheindoorunit
ofmulti-connectiontype.
9319357003-05_IM.indb 1 10/20/2017 15:56:53