Hitachi Primairy Series Instruction Manual

HO2019292HA
OUTDOOR UNITS
RAS-3.0UFESNH1
RAS-3.5UFESNH1
RAS-4.0UFESNH1
RAS-5.0UFESMH1
RAS-6.0UFESMH1
RAS-6.5UFESMH1
LARGE SINGLE SPLIT
DC-INVERTER SERIES

NOTE
• Thisairconditionerisdesignedforthefollowingtemperatures.Itshouldbeoperatedwithinthisrange:
Mode Outdoor operation temperature range (ºC)
Maximum Minimum
Cooling operation 48 -15
Heating operation 24 -15
• Storagecondition:Temperature-25~60ºC
Humidity30%~80%
• Thenumbersinthemodelrepresentthecoolingcapacity(HP).
• Forexample,3.0HPrepresentsRAS-3.0UFESNH1.

Contents
Safety precautions ..........................................................................................................................................1
Refrigerant ow diagram ................................................................................................................................9
Electrical wiring diagram................................................................................................................................9
Installation instructions................................................................................................................................10
Transportation and handling before installation........................................................................................................... 10
Installation locations selection ..................................................................................................................................... 10
Drainage elbow and drain hose installation..................................................................................................................11
Outdoor unit installation................................................................................................................................................11
Refrigerant piping ........................................................................................................................................................ 12
Wiring ................................................................................................................................................................... 16
Test run ................................................................................................................................................................... 18

Safety precautions
This air conditioner uses new refrigerant HFC(R32).
Since the max. working pressure is 4.3MPa (R22: 3.1MPa), some of the piping and installation and service tools are special.
This air conditioner uses power supply: 220-240V ~, 50Hz (3.0/3.5/4.0HP)
380-415V 3N ~, 50Hz (5.0/6.0/6.5HP)
Please read these SAFETY PRECAUTIONS carefully to ensure correct installation.
• Be sure to use a dedicated power circuit, and do not put other loads on the power supply.
• Be sure to read these SAFETY PRECAUTIONS carefully before installation.
• Be sure to comply with SAFETY PRECAUTIONS of installation manual, because it contains importantsafetyissues.Denitions
for identifying hazard levels are provided below with their respective safety symbols.
!
WARNING:
Hazards or unsafe practices which COULD result in severe personal injury or death.
!
CAUTION:
Hazards or unsafe practices which COULD result in minor personal injury or product or property damage.
• Pleasecarefullyleindoorandoutdoorunitmanualawayforfuturereference.
!
WARNING
• Installationshouldbeperformedbythequaliedpersonnel.Incompleteinstallationmaycausedamagebyre,electricshock,drop
orwaterleakage.
• Perform the installation securely by referring to the installation manual. Incomplete installation could cause a personal injury arising
fromre,electricshock,theunitfallingorleakageofwater.
• Install the air conditioner on a solid base that can support the unit weight. An inadequate base or incomplete installation may cause
injury due to unit falling off from the base.
• Wiring must be done by a qualied electrician. All the electric works must be performed in accordance with national wiring
regulations and local electrical codes.
• Usethespeciedtypeofwireforelectricalconnectionssafely.Firmlyclamptheinterconnectingwiressothattheirterminalsreceive
no external stresses.
• Forwiring,useacablelongenoughtocovertheentiredistancewithnoconnection,anddon'tconnectmultipledevicestothesame
ACpowersupply.Otherwise,itmayresultinbadcontact,poorinsulation,unallowablecurrent,andthusresultinareorelectric
shock.
• Afterallinstallationsarecompleted,checktomakesurethatnorefrigerantleakageoccurs.Iftherefrigerantgasleakagetothe
interior,andtheheater,stoveametouchingit,willgenerateharmfulsubstances.
• Ifthepowersupplycircuitcapacityorelectricalworkisnotinplace,itmaycauseareorelectricshock.
• Attach the electrical cover to the indoor unit and the service panel to the outdoor unit securely.
• Iftheelectricalcoversontheindoorunitortheservicepaneloftheoutdoorunitarenotattachedsecurely,itcouldresultinare
oranelectricshockduetodust,water,etc.
• PleasebesuretocutoffthemainpowersupplybeforetheinstallationofindoorelectronicPCBorwiring.Otherwise,itwillcause
electricshock.
• Pay attention to protecting the outdoor machine installation location. Avoid people or small animals contact with electrical
components.Pleasekeepthesurroundingenvironmentoftheoutdoorunitcleanandtidy.
• Wheninstallingorrelocatingtheunit,makesurethatnosubstanceotherthanthespeciedrefrigerant(R32)enterstherefrigerant
circuit.
• Any presence of foreign substance such as air can cause abnormal pressure rise or an explosion.
SAFETY PRECAUTIONS
HO2019292HA
1
EN

!
CAUTION
• Perform grounding. Do not connect the earth wire to a gas pipe, water pipe, lightning rod or telephone earth wire. Defective
groundingcouldcauseanelectricshock.
• Donotinstalltheunitinaplacewhereaninammablegasleaks.Ifgasleaksandaccumulatesintheareasurroundingtheunit,it
could cause an explosion.
• Fastenaarenutwithatorquewrenchasspeciedinthismanual.Whenfastenedtootight,aarenutmaybreakafteralong
period,therebycausingrefrigerantleakage.
• Installanearthleakagebreakerdependingontheinstallationplace(whereitishumid).Ifanearthleakagebreakerisnotinstalled,
itcouldcauseanelectricshock.
• Performthedrainage/pipingworksecurelyaccordingtotheinstallationmanual.
• Ifthereisadefectinthedrainage/pipingwork,watercoulddropfromtheunitandhouseholdgoodscouldbewetanddamaged.
Safety instructions
• Do not let air enter the refrigeration system or discharge refrigerant when moving the air conditioner.
• Theinstallationinstructionsforappliancesthatareintendedtobepermanentlyconnectedtoxedwiring,andhavealeakage
currentthatmayexceed10mA,shallstatethattheinstallationofaresidualcurrentdevice(RCD)havingaratedresidual
operatingcurrentnotexceeding30mAisadvisable.
• This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental
capabilitiesorlackofexperienceandknowledgeiftheyhavebeengivensupervisionorinstructionconcerninguseofthe
appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user
maintenance shall not be made by children without supervision.
• If the supply cord is damaged, it must be replaced by the factory or its service department to avoid danger.
• Servicing shall only be performed as recommended by the equipment manufacturer.
• Maintenanceandrepairrequiringtheassistanceofotherskilledpersonnelshallbecarriedoutunderthesupervisionofthe
personcompetentintheuseofammablerefrigerants.
• Meansfordisconnection,whichcanprovidefulldisconnectioninallpoles,mustbeincorporatedinthexedwiringinaccordance
with the wiring rules.
• Itisnecessarytoallowthedisconnectionoftheappliancefromthesupplyafterinstallation.Makesurethattheapplianceis
disconnectedfromthesupplyduringserviceandmaintenance,andprovideadisconnectionwithalockingsystemintheisolated
position.
• The method of connection of the appliance to the electrical supply and interconnection of separate components, and the wiring
diagramwithaclearindicationoftheconnectionsandwiringtoexternalcontroldevicesandsupplycordaredetailedbelow.
• Power connection and interconnection between outdoor unit and indoor unit should be conducted with the power cord of the
H07RN-Ftypeortheelectricallyequivalenttype.Thesizeofthepowercordisdetailedinoutdoorunitmanualbelow.
• Typeandratingofcircuitbreakers/ELBaredetailedbelow.
• The information on dimensions of the space necessary for correct installation of the appliance including the minimum permissible
distances to adjacent structures is detailed below.
• Thisapplianceisintendedtobeusedbyexpertortrainedusersinshops,inlightindustryandonfarms,orforcommercialuseby
lay persons.
• Inordertoavoidahazardduetoinadvertentresettingofthethermalcut-out,thisapplianceshallnotbesuppliedthroughan
externalswitchingdevice,suchasatimer,orconnectedtoacircuitthatisregularlyswitchedonandoffbytheuser.
• Instructions on additional charging of refrigerants are detailed below.
SAFETY PRECAUTIONS
HO2019292HA
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Safety precautions for using R32 refrigerant
Thebasicinstallationworkproceduresarethesameastheconventionalrefrigerant(R22orR410A).However,payattentiontothe
following points:
!
WARNING
1 Transport of equipment containing ammable refrigerants
Attentionisdrawntothefactthatadditionaltransportationregulationsmayexistwithrespecttoequipmentcontainingammable
gas.Themaximumnumberofpiecesofequipmentorthecongurationoftheequipmentpermittedtobetransportedtogetherwill
be determined by the applicable transport regulations.
2 Equipment signs
Signsforsimilarappliances(containingammablerefrigerants)usedinaworkareagenerallyareaddressedbylocalregulations
andgivetheminimumrequirementsfortheprovisionofsafetyand/orhealthsignsforaworklocation.Allrequiredsignsaretobe
maintainedandemployersshouldensurethatemployeesreceivesuitableandsufcientinstructionandtrainingonthemeaning
ofappropriatesafetysignsandtheactionsthatneedtobetakeninconnectionwiththesesigns.
The effectiveness of signs should not be diminished by too many signs being placed together. Any pictograms used should be as
simple as possible and contain only essential details.
3 Disposal of equipment containig ammable refrigerants
In compliance with national regulations.
4 Storage of equipment/appliances
The storage of equipment should be in accordance with the manufacturer's instructions.
5 Storage of packed (unsold) equipment
• Storagepackageprotectionshouldbeconstructedsothatmechanicaldamagetotheequipmentinsidethepackagewill
notcausealeakoftherefrigerantcharge.
• Themaximumnumberofpiecesofequipmentpermittedtobestoredtogetherwillbedeterminedbylocalregulations.
6 Information on servicing
6.1. Checking the area
Priortobeginningworkonsystemscontainingammablerefrigerants,safetychecksarenecessarytoensurethattheriskof
ignition is minimised. To repair the refrigerating system, the following precautions should be complied with prior to conducting
workonthesystem.
6.2. Work procedure
Workshallbeundertakenunderacontrolledproceduresoastominimisetheriskofammablegasorvapourbeingpresent
whiletheworkisbeingperformed.
6.3. General work area
• Allmaintenancestaffandothersworkinginthelocalareashallbeinstructedonthenatureofworkbeingcarriedout.
Workinconnedspacesshallbeavoided.
• Theareaaroundtheworkspaceshallbesectionedoff.Ensurethattheconditionswithintheareahavebeenmadesafe
bycontrolofammablematerial.
6.4. Checking for leakage of refrigerant
• Theareashallbecheckedwithanappropriaterefrigerantdetectorpriortoandduringwork,toensurethetechnicianis
awareofpotentiallyammableatmospheres.
• Ensurethattheleakdetectionequipmentbeingusedissuitableforusewithammablerefrigerants,i.e.nonsparking,
adequately sealed or intrinsically safe.
6.5. Fire extinguisher
• Ifanyhotworkistobeconductedontherefrigerationequipmentoranyassociatedparts,appropriatereextinguishing
equipment shall be available.
• Have a dry powder or CO2reextinguisheradjacenttothechargingarea.
6.6. No ignition sources
• Nopersoncarryingoutworkinrelationtoarefrigerationsystemwhichinvolvesexposinganypipeworkthatcontainsor
hascontainedammablerefrigerantshalluseanysourcesofignitioninsuchamannerthatitmayleadtotheriskofre
orexplosion.
SAFETY PRECAUTIONS
HO2019292HA
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EN

• Allpossibleignitionsources,includingcigarettesmoking,shouldbekeptsufcientlyfarawayfromthesiteofinstallation,
repairing,removinganddisposal,duringwhichammablerefrigerantcanpossiblybereleasedtothesurroundingspace.
• Priortoworktakingplace,theareaaroundtheequipmentistobesurveyedtomakesurethattherearenoammable
hazardsorignitionrisks.“NoSmoking”signsshallbedisplayed.
6.7. Ventilated area
• Ensure that the installation area is outdoors or that it is adequately ventilated before dismanteling the system or
conductinganyhotwork.
• Ventilationshallcontinueduringtheperiodthattheworkiscarriedout.
• Theventilationshouldsafelydisperseanyreleasedrefrigerantandpreferablyexpelitexternallyintotheatmosphere.
6.8. Checking the refrigeration equipment
• Whereelectricalcomponentsarebeingchanged,theyshallbetforthepurposeandtothecorrectspecication.
• At all times the manufacturer's maintenance and service guidelines shall be followed. If in doubt consult the
manufacturer's technical department for assistance.
• Thefollowingchecksshallbeappliedtoinstallationsusingammablerefrigerants:
-The charge amount size is in accordance with the room size within which the refrigerant containing parts are installed;
-The ventilation machinery and outlets are operating adequately and are not obstructed;
-Ifanindirectrefrigeratingcircuitisbeingused,thesecondarycircuitshallbecheckedfortheleakofrefrigerant;
-Markingtotheequipmentcontinuestobevisibleandlegible.Markingsandsignsthatareillegibleshallbecorrected;
-Refrigerationpipeorcomponentsareinstalledinapositionwheretheyareunlikelytobeexposedtoanysubstance
which may corrode refrigerant containing components, unless the components are constructed of materials which are
inherently resistant to being corroded or are suitably protected against being so corroded.
6.9. Checking electrical devices
• Repairandmaintenancetoelectricalcomponentsshallincludeinitialsafetychecksandcomponentinspection
procedures.
• Ifafaultexiststhatcouldcompromisesafety,thennoelectricalsupplyshallbeconnectedtothecircuituntilitis
satisfactorily solved.
• If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution
shall be used.
• This shall be reported to the owner of the equipment so all parties are advised.
• Initialsafetychecksshallinclude:
-Thatcapacitorsaredischarged:thisshallbedoneinasafemannertoavoidpossibilityofsparking;
-Thatnoliveelectricalcomponentsandwiringareexposedwhilecharging,recoveringorpurgingthesystem;
-That there is continuity of earth bonding.
7 Repairing to sealed components
• Duringrepairstosealedcomponents,allelectricalsuppliesshallbedisconnectedfromtheequipmentbeingworkedupon
prior to any removal of sealed covers, etc.
• If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form
ofleakdetectionshallbelocatedatthemostcriticalpointtowarnofapotentiallyhazardoussituation.
• Particularattentionshallbepaidtoensurethatbyworkingonelectricalcomponents,thecasingisnotalteredinsucha
way that the level of protection is affected.
• Thisshallincludedamagetocables,excessivenumberofconnections,terminalsnotmadetooriginalspecication,
damagetoseals,incorrectttingofglands,etc.
• Ensure that the device is mounted securely.
• Ensure that seals or sealing materials have not degraded in such a manner that they no longer serve the purpose of
preventingtheingressofammableatmospheres.
• Replacementpartsshallbeinaccordancewiththemanufacturer'sspecications.
NOTE: Theuseofsiliconesealantsmayinhibittheeffectivenessofsometypesofleakdetectionequipment.Intrinsicallysafecomponents
donothavetobeisolatedpriortoworkingonthem.
SAFETY PRECAUTIONS
HO2019292HA
4

8 Repairing intrinsically safe components
• Donotapplyanypermanentinductiveorcapacitiveloadstothecircuitwithoutensuringthatthiswillnotexceedthe
permissible voltage and current for the equipment in use.
• Intrinsicallysafecomponentsaretheonlytypesthatcanbeworkedonwhileliveinthepresenceofaammable
atmosphere. The test device shall be at the correct rating.
• Replacecomponentsonlywithpartsspeciedbythemanufacturer.
• Otherpartsmayresultintheignitionofrefrigerantintheatmospherefromaleak.
9 Cabling
• Checkthatcablingwillnotbesubjecttowear,corrosion,excessivepressure,vibration,sharpedgesoranyotheradverse
environmental effects.
• Thecheckshallalsotakeintoaccounttheeffectsofagingorcontinualvibrationfromsourcessuchascompressorsor
fans.
10 Detection of ammable refrigerants
• Undernocircumstancesshallpotentialsourcesofignitionbeusedinthesearchingforordetectionofrefrigerantleaks.
• Ahalidetorch(oranyotherdetectorusinganakedame)shallnotbeused.
11 Leak detection methods
Thefollowingleakdetectionmethodsaredeemedacceptableforsystemscontainingammablerefrigerants:
• Electronicleakdetectorsshallbeusedtodetectammablerefrigerants,butthesensitivitymaynotbeadequate,ormay
needre-calibration.(Detectionequipmentshallbecalibratedinarefrigerant-freearea.)
• Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used.
• LeakdetectionequipmentshallbesetatapercentageoftheLFLoftherefrigerantandshallbecalibratedtothe
refrigerantemployedandtheappropriatepercentageofgas(25%maximum)isconrmed.
• Leakdetectionuidsaresuitableforusewithmostrefrigerantsbuttheuseofdetergentscontainingchlorineshallbe
avoidedasthechlorinemayreactwiththerefrigerantandcorrodethecopperpipe-work.
• Ifaleakissuspected,allnakedamesshallberemoved/extinguished.
• Ifaleakageofrefrigerantisfoundwhichrequiresbrazingisfound,alloftherefrigerantshallberecoveredfromthe
system,orisolated(bymeansofshutoffvalves)inapartofthesystemremotefromtheleak.
• Oxygenfreenitrogen(OFN)shallthenbepurgedthroughthesystembothbeforeandduringthebrazingprocess.
12 Removal and evacuation
• Whenbreakingintotherefrigerantcircuittomakerepairs–orforanyotherpurpose–conventionalproceduresshallbe
used.
• However,itisimportantthatbestpracticeisfollowedsinceammabilityisaconsideration.
• The following procedure shall be adhered to:
-Remove refrigerant;
-Purge the circuit with inert gas;
-Evacuate;
-Purge again with inert gas;
-Open the circuit by cutting or brazing.
• The refrigerant charge shall be recovered into the correct recovery cylinders.
• Thesystemshallbe“ushedout”withOFNtorendertheunitsafe.
• This process may need to be repeated several times.
• Compressedairoroxygenshallnotbeusedforthistask.
• FlushingshallbeachievedbybreakingthevacuuminthesystemwithOFNandcontinuingtolluntiltheworking
pressureisachieved,thenventingtoatmosphere,andnallypullingdowntoavacuum.
• Thisprocessshallberepeateduntilnorefrigerantiswithinthesystem.WhenthenalOFNchargeisused,thesystem
shallbeventeddowntoatmosphericpressuretoenableworktotakeplace.
• Thisoperationisabsolutelyvitalifbrazingoperationsonthepipe-workaretotakeplace.
• Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is ventilation available.
SAFETY PRECAUTIONS
HO2019292HA
5
EN

13 Charging procedures
• In addition to conventional charging procedures, the following requirements shall be followed:
-Ensure that contamination of different refrigerants does not occur when using charging equipment.
-Hoses or lines shall be as short as possible to minimise the amount of refrigerant contained in them.
-Cylindersshallbekeptupright.
-Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
-Labelthesystemwhenchargingiscomplete(ifnotalready).
-Extremecareshallbetakennottooverlltherefrigerationsystem.
-Prior to recharging the system it shall be pressure tested with OFN.
• Thesystemshallbeleaktestedoncompletionofchargingbutpriortocommissioning.
• Afollowupleaktestshallbecarriedoutpriortoleavingthesite.
14 Decommissioning
Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail.
It is recommended good practice that all refrigerants are recovered safely.
Priortothetaskbeingcarriedout,anoilandrefrigerantsampleshallbetakenincaseanalysisisrequiredpriortore-useof
reclaimedrefrigerant.Itisessentialthatelectricalpowerisavailablebeforethetaskiscommenced.
a. Become familiar with the equipment and its operation.
b. Isolate system electrically.
c. Before attempting the procedure ensure that:
• Mechanical handling equipment is available, if required, for handling refrigerant cylinders;
• All personal protective equipment is available and being used correctly;
• The recovery process is supervised at all times by a competent person;
• Recovery equipment and cylinders conform to the appropriate standards.
d. Pump down refrigerant system, if possible.
e. If a vacuum is not possible, use the manifolds so that refrigerant can be removed from various parts of the system.
f. Makesurethatcylinderissituatedonthescalesbeforerecoverytakesplace.
g. Start the recovery machine and operate in accordance with manufacturer's instructions.
h. Donotoverllcylinders.(Nomorethan80%volumeliquidcharge.)
i. Donotexceedthemaximumworkingpressureofthecylinder,eventemporarily.
j. Whenthecylindershavebeenlledcorrectlyandtheprocesscompleted,makesurethatthecylindersandthe equipment
are removed from site promptly and all isolation valves on the equipment are closed off.
k. Recovered refrigerant shall not be charged into another refrigeration system unless it has beencleanedandchecked.
15 Labelling
• Equipmentshallbelabelledstatingthatithasbeende-commissionedandemptiedofrefrigerant.
• The label shall be dated and signed.
• Ensurethattherearelabelsontheequipmentstatingtheequipmentcontainsammablerefrigerant.
16 Recovery
• When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that
all refrigerants are removed safely.
• When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed.
• Ensure that the correct number of cylinders for holding the total system charge is available.
• Allcylinderstobeusedaredesignatedfortherecoveredrefrigerantandlabelledforthatrefrigerant(i.e.specialcylinders
fortherecoveryofrefrigerant).
• Cylindersshallbecompletewithpressurereliefvalveandassociatedshut-offvalvesingoodworkingorder.
• Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.
• Therecoveryequipmentshallbeingoodworkingorderwithasetofinstructionsconcerningtheequipmentthatis
availableandshallbesuitablefortherecoveryofammablerefrigerants.
SAFETY PRECAUTIONS
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• Inaddition,asetofcalibratedweighingscalesshallbeavailableandingoodworkingorder.
• Hosesshallbecompletewithleak-freedisconnectcouplingsandingoodcondition.
• Beforeusingtherecoverymachine,checkthatitisinsatisfactoryworkingorder,hasbeenproperlymaintainedandthat
any associated electrical components are sealed to prevent ignition in the event of a refrigerant release.
• Consult manufacturer if in doubt.
• The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant
Waste Transfer Note arranged.
• Donotmixrefrigerantsinrecoveryunitsandespeciallynotincylinders.
• If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to
makecertainthatammablerefrigerantdoesnotremainwithinthelubricant.
• The evacuation process shall be carried out prior to returning the compressor to the suppliers.
• Only electric heating to the compressor body shall be employed to accelerate this process.
• When oil is drained from a system, it shall be carried out safely.
• Applianceshallbeinstalled,operatedandstoredinaroomwithaoorarealargerthanX(forX,seeindoorunit
instructionmanual).
• Theinstallationofpipe-workshallbekepttoaaroomwithaoorarealargerthanX(forX,seeindoorunitinstruction
manual).
• Thepipe-workshallbecompliantwithnationalgasregulations.
• ThemaximumrefrigerantchargeamountisXkg(Xseebelow).
• Whenmovingorrelocatingtheairconditioner,consultexperiencedservicetechniciansfordisconnectionand
reinstallation of the unit.
• Do not place any other electrical products or household belongings under indoor unit or outdoor unit.
• Condensation dripping from the unit might get them wet, and may cause damage or malfunction of your property.
• Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
• Theapplianceshallbestoredinaroomwithoutcontinuouslyoperatingignitionsources(forexample:openames,an
operatinggasapplianceoranoperatingelectricheater).
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odour.
• Tokeepventilationopeningsclearofobstruction.
• Theapplianceshallbestoredinawell-ventilatedareawheretheroomsizecorrespondstotheroomareaasspeciedfor
operation.
• Theapplianceshallbestoredinaroomwithoutcontinuouslyoperatingopenames(forexampleanoperatingappliance)
andignitionsources(forexampleanoperatingelectricheater).
• Anypersonwhoisinvolvedwithworkingonordismantelingarefrigerantcircuitshouldholdacurrentvalidcerticate
fromanindustry-accreditedassessmentauthority,whichauthorisestheircompetencetohandlerefrigerantssafelyin
accordancewithanindustryrecognisedassessmentspecication.
• Servicing shall only be performed as recommended by the equipment manufacturer.
• Maintenanceandrepairrequiringtheassistanceofotherskilledpersonnelshallbecarriedoutunderthesupervisionof
thepersoncompetentintheuseofammablerefrigerants.
• The appliance shall be installed and stored so as to prevent mechanical damage from occurring.
• MechanicalconnectorsusedindoorsshallcomplywithISO14903.Whenmechanicalconnectorsarereusedindoors,
sealingpartsshallberenewed.Whenaredjointsarereusedindoors,thearepartshallbere-fabricated.
• Theinstallationofpipe-workshallbekepttoaminimum.
• Mechanical connections shall be accessible for maintenance purposes.
Max. Refrigerant Charge Amount X (kg)
Model 3.0HP 3.5HP 4.0HP 5.0HP 6.0HP 6.5HP
Max.RefrigerantCharge 2.1 2.71 3.26 3.76 4.26 4.66
SAFETY PRECAUTIONS
HO2019292HA
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EN

Explanation of symbols displayed on the indoor unit or outdoor unit
WARNING
Thissymbolshowsthatthisapplianceusesaammablerefrigerant.
Iftherefrigerantisleakedandexposedtoanexternalignitionsource,thereisariskofre.
CAUTION This symbol shows that the operation manual should be read carefully.
CAUTION This symbol shows that a service personnel should handle this equipment with reference to
the installation manual.
CAUTION This symbol shows that information is available such as the operating manual or installation
manual.
SAFETY PRECAUTIONS
HO2019292HA
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Refrigerant ow diagram
EEV
OUTDOOR UNITINDOOR UNIT
Gas
piping
Service valve
withcheckjoint
Compressor
Accumulator
4-wayvalve
Heatexchanger
Liquid
piping
Service valve
Heating cycle
Cooling cycle
Electrical wiring diagram
4(SI
)4
(SI)
1(L) 1(L)
2(N) 2(N)
N
L
Outdoor unit
Terminals
Indoor unit
Terminals
Transmission cable
Power supply
4(SI
)4
(SI)
1(L) 1(L)
2(N) 2(N)
N
W
U
V
Outdoor unit
Terminals
Indoor unit
Terminals
Transmission cable
Power supply
3.0/3.5/4.0HP 5.0/6.0/6.5HP
REFRIGERANTFLOWDIAGRAM
HO2019292HA
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EN

Installation instructions
Transportation and handling before installation
Transporttheproductasclosetotheinstallationlocationaspracticalbeforeunpacking.
• Handling Method
Whenhandlingtheunit,ensureabalanceoftheunit,check
safety and lift it up smoothly.
1Donotremoveanypackingmaterials.
2Hangtheunitunderpackingconditionwithtworopes,as
showningurebelow.
• Handling
Iftheproducthasnopackagetomove,pleaseprotectwith
cloth or paper.
Put cloth or paper
Installation locations selection
Before choosing the installation site, obtain user’s approval.
• Whereitisnotexposedtostrongwind.
• Whereairowisgoodandclean.
• Whereitisnotexposedtorainanddirectsunshine.
• Where neighbours are not annoyed by operation sound or hot air.
• Where rigid wall or support is available to prevent the increase of operation sound or vibration.
• Wherethereisnoriskofcombustiblegasleakage.
• Whereitisatleast3mawayfromtheantennaofTVsetorradio.Anampliermayberequiredfortheaffecteddevice.
• Install the unit horizontally.
• Please install it in an area not affected by snowfall or blowing snow. In areas with heavy snow, please install a canopy, a pedestal
and/orsomebafeboards.
!
CAUTION
Avoid the following places for installation where air conditioner
trouble is liable to occur.
• Where there is much machine oil.
• Salty places such as seaside.
• Wheresuldegasisgeneratedsuchasahotspring.
• Wherethereishigh-frequencyorwirelessequipment.
Over300mm(3.0/3.5/4.0HP)
Over600mm(5.0/6.0/6.5HP)
Over150mm
Over350mm
Over200mm
Over500mm
NOTE:
Whenoperatingtheairconditionerinlowoutsidetemperature,besuretofollowtheinstructiondescribedbelow:
• Never install the outdoor unit in a place where its air inlet/outlet side may be exposed directly to wind.
• Topreventexposuretowind,installtheoutdoorunitwithitsairinletsidefacingthewall.
• Topreventexposuretowind,itisrecommendedtoinstallabafeboardontheairoutletsideoftheoutdoorunit.
INSTALLATIONINSTRUCTIONS
HO2019292HA
10

Drainage elbow and drain hose installation
Install Drainage Elbow and Drain Hose
• The condensate water may drain from the outdoor unit when
the unit operates in heating mode. In order to avoid disturbing
neighbors and protect the environment, it is necessary to
install a drainage elbow and a drain hose to drain out the
condensate water.
• Pleasedothedrainageworkbeforetheindoorunitand
outdoorunitareconnected.Otherwise,itwillbedifcultto
install drainage elbow after the machine becomes immovable.
• Connectthedrainhose(eld-supplied,inside
diameter:15mm)asshowninthegurefordrainage.
Drain hose
Drainage elbow
NOTE:
Do not use the drainage elbow in a cold region. Drain may freeze
to stop the fan runs.
Outdoor unit installation
1 Use the washer provided in the accessory to fasten the machine at the foundation bolts.
2 When fastening the outdoor unit with the foundation bolts, the fasten holes position is shown at the Fig. 1.
3 Fasten the outdoor unit as the Fig. 2.
4 Makesuretofastentheoutdoorunittightandhorizontaltopreventnoisewhenthemachineisobliqueorinclinedbystrong
breezeorearthquake.
5 Donotdrainoffwatertopublicplacestoavoidtoskidding.
6 Astrongbase(madeofconcrete,etc.)shouldbemade.Theapplianceshouldbeplacednotlessthan10cmhightoavoidbeing
wetorcorroded.Otherwise,itmaycausedamagetotheapplianceorreduceitslifetime.(Fig.3)
7 Fixtheunitwithwireropestopreventoverturningincasethatastrongseasonalwindblowsagainsttheunit(Fig.4).
(Unit:mm)
Model A B C D E F d
3.0/3.5HP 860 310 542 341 368 168 11x17
4.0/5.0/6.0/6.5HP 950 340 580 380 414 185 15
Fig.1
Setscrew
(atleast4)
Min.10cm
About10cm
About40cm
Concrete base, etc.
Fig.3
Cut it off, if the bolts are
too long, or it will be
troublesome of the moving
in the future. Anchor boltBeton
Max.21mm
Fig.2
Wire ropes
Fig.4
INSTALLATIONINSTRUCTIONS
HO2019292HA
11
EN

Refrigerant piping
1 Piping requirement
Model Outerdiameterofpipe(mm)
Gas Liquid
3.0/3.5HP 15.88 9.52
4.0/5.0/6.0/6.5HP 19.05 9.52
The shorter the refrigerant piping is, the better the performance will be. So the connecting pipe should be as short as possible.
Indoor unit
Outdoor unit
PipelengthL
Height difference H
(Unit:mm)
Model Max.pipelength
(L)
Max.height
difference(H)
Add. refrigerant
(exceed5m)
3.0HP 30(m) 15(m) 28(g/m)
3.5/4.0/5.0/
6.0/6.5HP 50(m) 30(m) 28(g/m)
Refrigerant piping between indoor unit and outdoor unit
Oil trap
Slope:1/200~1/250
Slope:1/200~1/250
Oil trap
Refrigerant additional charge
Theunithasbeenlledwithrefrigerant,butifexceeds5m,additionalrefrigerant(R32)chargeisrequired.
Additionalrefrigerantcharge=(L-5)×28g/m
Oil trap
Whentheindoorunitislowerthanoutdoorunitandheightislargerthan5m,setanoiltrapevery5m(heightdifference)onsuction
piping.
NOTE:
• Toavoidstoringtoomuchoilintheoiltrap,theoiltrapshouldbeasshortaspossible.
• Thehorizontalpipingshouldbeslopedownalongtherefrigerantowdirection,tobringtheoilbacktocompressor,theslopeis
about1/200to1/250.
• Inordertoensureabettercooling/heatingperformance,therefrigerantpipingshouldbeasshortandstraightaspossible.
2 Piping material
1. Preparelocally-suppliedcopperpipes.
2. Selectcleancopperpipes.Makesurethatthereisnodustandmoistureinsideofthepipes.Blowtheinsideofthepipeswith
nitrogen or dry air to remove any dust or foreign materials before connecting pipes.
3. Pipingthicknessandmaterialofthepipeareshownbelow.
Unit: mm
Diameter Thickness
∅6.35 0.8
∅9.52 0.8
∅12.7 0.8
∅15.88 1.0
∅19.05 1.0
INSTALLATIONINSTRUCTIONS
HO2019292HA
12

!
CAUTION
When installing pipe through the wall,
secure a cap at the end of the pipe.
Do not place the pipe directly on the
ground.
Attach a cap or
vinyl tape.
Attach a cap or
vinyl tape.
Attach a cap or vinyl
bag with rubber band.
Rain water
can enter
Correct Incorrect
Correct Incorrect Correct Incorrect
3 Processing of refrigerant piping
1. Pipe cutting
Cut the copper pipe correctly with a pipe cutter.
2. Burrs removal
Completely remove all burrs from the cross section of the pipe.
Put the end of the copper pipe downward to prevent burrs from
dropping in the pipe.
3. Putting nut on
Removearenutsattachedtoindoorandoutdoorunits,thenput
them on burrs removed pipe.
(Notpossibletoputthemonafteraringwork).
Flare nut for pipe depends on the diameter of pipe.
4. Flaringwork
Performaringworkwitharingtoolasshownbelow.
5. Check
Comparethearedworkwiththegurebelow.
Ifareisnotedtobedefective,cutoffthearedsectionand
performaringworkagain.
(Unit:mm)
Diameter ∅dA+0
-0.4
6.35 9.1
9.52 13.2
12.7 16.6
15.88 19.7
90o
Good
No good
Tilted Uneven Burred
Flaring tool
Clutch type
Wing nut type
Flare nut
Copper pipe
Copper pipeBurr
Spare
reamer
Pipe
cutter
Die
Copper pipe
Die
Yoke
Copper
pipe
Flare
nut
Smooth all
around
Inside is shining without any scratches
INSTALLATIONINSTRUCTIONS
HO2019292HA
13
EN

4 Piping connection
1. Conrmthatthevalveisclosed
2. Connecttheindoorunitandtheoutdoorunitwitheld-supplied
refrigerant piping. Suspend the refrigerant piping at certain points
andpreventtherefrigerantpipingfromtouchingtheweakpartofthe
building such as wall, ceiling, etc.
(Iftouched,abnormalsoundmayoccurduetothevibrationofthe
piping.Payspecialattentionincaseofshortpipinglength.)
3. Tightenthearenutwithtwospannersasshownintherightgure.
4. Applytherefrigerantoil(eld-supplied)thinlyattheseatsurfaceof
thearenutandpipebeforeconnectingandtightening.Andwhen
tighteningthearenut,usetwospanners.
5. Outdoor refrigerant piping should connect with stop valve.
Doublespannerwork
Tube size Torque(Nm)
∅6.35mm 20
∅9.52mm 40
∅12.7mm 60
∅15.88mm 80
∅19.05mm 100
Tighteningtorqueforarenut
6. Afternishingconnectingtherefrigerantpipes,keepitwarmwiththe
insulationmaterialasshownintherightgure.
For outdoor unit side, surely insulate every piping including valves.
Cover piping joints with pipe cover.
Using piping tape, apply taping starting from the entry of outdoor unit.
Fixtheendofpipingtapewithadhesivetape.
When piping has to be arranged through above ceiling, closet or
area where temperature and humidity are high, use wind additional
commercially sold insulation for prevention of condensation
Clamp
(eld-supplied)
Insulation
(eld-supplied)
Refrigerant pipe
(eld-supplied)
Insulation
(eld-supplied)
Piping insulation procedure
5 Air tight test
Do use Nitrogen
Connect the gauge manifold using charging hoses with a nitrogen cylinder
tocheckjointsoftheliquidlineandthegaslinestopvalves.
Perform the air tight test.
Don't open the gas line stop valves.
Applynitrogengaspressureof4.15MPa.
Checkanygasleakageatarenutconnections,orbrazedpartsbygasleak
detector or foaming agent.
Gas pressure doesn’t decrease, which is OK.
After the air tight test, release nitrogen gas.
Procedure
Completion
of
Refrigerant
piping
Applying
nitrogen
gas
Air tight procedure
Checkof
pressure
decrease
Pass
Repairing
ofleakage
part
INSTALLATIONINSTRUCTIONS
HO2019292HA
14

6 Vacuum pumping and charge refrigerant
• Vacuum pumping
1. Remove the service port cap of the stop valve on the gas pipe side of
the outdoor unit.
2. Connect the manifold gauge and vacuum pump to the service port of
the stop valve on the gas pipe side of the outdoor unit.
3. Runthevacuumpump.(Workformorethan15minutes.)
4. Checkthevacuumwiththegaugemanifoldvalve,thenclosethegauge
manifold valve and stop the vacuum pump.
5. Leaveitasisforoneortwominutes.Makesurethatthepointerof
themanifoldgaugeremainsinthesameposition.Conrmthatthe
pressuregaugeshows-0.101MPa(or-760mmHg).
6. Removethemanifoldgaugequicklyfromtheserviceportofthestop
valve.
7. After refrigerant pipes are connected and evacuated, fully open all stop
valves on both sides of gas pipe and liquid pipe.
8. Open adjusted valve to add refrigerant.
9. Tighten the cap to the service port.
10.Retighten the cap.
11. Leaktestfoamwithhalogenleakdetectortocheckthearenutand
brazingleaks.Usefoamthatdoesnotgenerateammonia(NH3)inthe
reaction.
Fig.9.2
Indoor unit
Pressure gauge
Outdoor unit
Manifold
valve
Charge hose
(forR32)
Vacuum pump
!
CAUTION
An excess or a shortage of refrigerant is the main cause of trouble to the unit. Charge the correct quantity of refrigerant according
to the description in the manual.
Checkrefrigerantleakageindetail.Ifalargerefrigerantleakageoccurs,itwillcausedifcultyinbreathingorharmfulgaseswill
occurifareisbeingusedintheroom.
• Additional refrigerant charge
Theunithasbeenlledwithrefrigerant.
Pleasecalculateadditionalchargeaccordingto“PipingRequirement”.
Afternishingvacuumpumpprocedures,rstexhaustairfromcharge
hose, then open valves, charge refrigerant through liquid stop valve.
At the end, please close valves and record the refrigerant charge
quantity.
Thisproductcontainsuorinatedgreenhousegasescoveredbythe
Kyoto Protocol.
Do not vent gases into the atmosphere.
Pleasellintherefrigerantchargelabelthatadheredintheproximityof
theproductchargingportwithindelibleink.
tCO
2
:
R3 2
675
kg:
kg:
Containsuorinatedgreenhousegases.
Refrigerant
(A)GWP
Additional charge
(B)Totalcharge
tCO2=(A)x(B)/1000
INSTALLATIONINSTRUCTIONS
HO2019292HA
15
EN

Wiring
!
WARNING
• TurnOFFthemainpowerswitchoftheindoorunitandtheoutdoorunitandwaitformorethan3minutesbeforeelectricalwiring
workoraperiodicalcheckisperformed.
• Check to ensure that the indoor fan and the outdoor fan have stopped before electrical wiring work or a periodical check is
performed.
• Protectthewires,electricalparts,etc.fromratsorothersmallanimals.Ifnotprotected,ratsmaygnawatunprotectedpartsand
attheworst,arewilloccur.
• Avoidthewiringfromtouchingtherefrigerantpipes,plateedgesandelectricalpartsinsidetheunit.Ifnotdo,thewireswillbe
damagedandattheworst,arewilloccur.
• InstallanELB(ElectricLeakageBreaker)inthepowersource.IfELBisnotused,itwillcauseelectricshockorreattheworst.
• Thisunit usesaninverter, whichmeansthatitmust beusedanearthleak detectorcapableofhandingharmonics inorderto
preventmalfunctioningoftheearthleakdetectoritself.
• Do not use intermediate connection wires, stranded wires (see <Attentions when Connecting the Power Supply wiring>),
extensioncablesorcontrollineconnection,becausetheuseofthesewiresmaycauseabnormalheat,electricshockorre.
• The tightening torque of each screw is shown as follows.
M4:1.0to1.3Nm
M5:2.0to2.5Nm
M6:4.0to5.0Nm
M8:9.0to11.0Nm
M10:18.0to23.0Nm
Keeptheabovetighteningtorqueduringwiringwork.
!
CAUTION
• Use tape material to wrap the wire and seal wiring holes to prevent the condensed water and insects.
• Tightly secure the power source wiring by using the cord clamp inside the unit.
 NOTE:Fixtherubberbusheswithadhesivewhenconduittubestotheoutdoorunitarenotused.
General Check
1. Makesurethattheeld-selectedelectricalcomponents(mainpowerswitches,circuitbreakers,wires,conduitconnectorsand
wireterminals)havebeenproperlyselectedaccordingtotheelectricaldata.
MakesurethatthecomponentscomplywithNationalElectricalCode(NEC).
2. Checktoensurethatthevoltageofpowersupplyiswithin10%ofnominalvoltageandearthphaseiscontainedinthepower
supply wires. If not, electrical parts will be damaged.
3. Checktoensurethatthecapacityofpowersupplyisenough.Ifnot,thecompressorwillnotbeabletooperatebecauseof
abnormal voltage drop at starting.
4. Checktoensurethattheearthwireisconnected.
5. Installamainswitch,multi-polemainswitchwithaspaceof3.5mmormore,singlephasemainswitchwithaspaceof3.0mmor
more between phases.
6. Checktoensurethattheelectricalresistanceismorethan2MΩ,bymeasuringtheresistancebetweengroundandtheterminal
oftheelectricalparts.Ifnot,donotoperatethesystemuntiltheelectricalleakageisfoundandrepaired.
INSTALLATIONINSTRUCTIONS
HO2019292HA
16