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Fujitsu AOMG18LBLA Installation guide

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AIR CONDITIONER
OUTDOOR UNIT
PART No. 9377863423-02
INSTALLATION MANUAL
English
ไทย
For authorized service personnel only.[Original instructions]
Contents
1. SAFETY PRECAUTIONS .................................................................1
2. ABOUT THIS PRODUCT..................................................................1
3. INSTALLATION WORK ....................................................................3
4. INSTALLATION DIAGRAM ...............................................................4
5. INSTALLATION ................................................................................4
6. PUMP DOWN ...................................................................................6
Notes:
• Thismanualdescribeshowtoinstalltheoutdoorunitonly.Toinstalltheindoorunit,
refertotheinstallationmanualincludedwiththeindoorunit.
• Besuretoreadthismanualthoroughlybeforetheinstallation.
• 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.
• Aftertheinstallation,explaincorrectoperationtothecustomerbyusingtheoperating
manual.
1. SAFETY PRECAUTIONS
The warningsandprecautions indicated inthis manual contain important information
pertainingtoyoursafety.Besuretoobservethem.
WARNING
Thismarkindicatesprocedureswhich,ifimproperlyper-
formed,mightleadtothedeathorseriousinjuryoftheuser.
Fortheairconditionertooperatesatisfactorily,installitasoutlinedinthisinstallation
manual.
Theapplianceshallbeinstalledinaccordancewithnationalwiringregulations.
Nevertouchelectricalcomponentsimmediatelyafterthepowersupplyhasbeen
turnedoff.Electricalshockmayoccur.Afterturningoffthepower,alwayswait
5minutesormorebeforetouchingelectricalcomponents.
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whileworkisbeingcarriedout,ventilatethearea.Iftherefrigerant
comesincontactwithaame,itproducesatoxicgas.
Connecttheindoorunitandoutdoorunitwiththeairconditionerpipingandcable
availablestandardparts.
Thisinstallationmanualdescribesthecorrectconnectionsusingtheinstallationset
availablefromourstandardparts.
Donotuseanextensioncable.
Donotpurgetheairwithrefrigerantsbutuseavacuumpumptovacuumthe
installation.
Thereisnotextrarefrigerantintheoutdoorunitforairpurging.
Ifthesupplycableisdamaged,itmustbereplacedbythemanufacture,itsservice
agentorsimilarlyqualiedpersonsinordertoavoidahazard.
CAUTION
Thismarkindicatesprocedureswhich,ifimproperly
performed,mightpossiblyresultinpersonalharmtotheuser,
ordamagetoproperty.
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.
Thisunitmustbeinstalledbyqualiedpersonnelwithacapacitycerticateforhandling
refrigerantuids.Refertoregulationandlawsinuseoninstallationplace.
Theunitmustbecorrectlygroundedandthesupplylinemustbeequippedwitha
differentialbreakerinordertoprotectthepersons.
Theunitsarenotexplosionproofandthereforeshouldnotbeinstalledinexplosive
atmosphere.
Thisunitcontainsnouser-serviceableparts.Alwaysconsultauthorizedservice
personnel to repairs.
Childrenshouldbemonitoredtoensuretheydonotplaywiththedevice.
Thisproductisnotintendedtobeusedbypeople(includingchildren)withphysical,
sensoryormentaldisability,orpersonslackingexperienceorknowledgeunlessthey
havebeengivenbythethroughapersonresponsiblefortheirsafety,supervisionor
instruction concerning the use of 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.
• Becarefulnottoscratchtheairconditionerwhenhandlingit.
• Afterinstallation,explaincorrectoperationtothecustomer,usingtheoperatingmanual.
2. ABOUT THIS PRODUCT
2.1. Precautions for using R410A refrigerant
WARNING
Thebasicinstallationworkproceduresarethesameasconventionalrefrigerant(R22)
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flarenutswiththeR410Apiping
andarenuts.
ModelsthatuserefrigerantR410Ahaveadifferentchargingportthreaddiametertopre-
venterroneouschargingwithconventionalrefrigerant(R22)andforsafety.Therefore,
checkbeforehand.[ThechargingportthreaddiameterforR410Ais1/2inch.]
Bemorecarefulthatforeignmatter(oil,water,etc.)doesnotenterthepipingthanwith
refrigerant(R22)models.Also,whenstoringthepiping,securelysealtheopening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
Tool name Contents of change
Gauge manifold
Pressureis high and cannot be measured with a conven-
tional (R22) 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.
Charge 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.
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Copper pipes
Itisnecessarytouseseamlesscopperpipesanditisdesirablethattheamountofresidual
oil is less than40 mg/10m. Do notuse copperpipes having a collapsed, deformedor
discolored portion (especiallyon the interiorsurface). Otherwise, the expansionvalueor
capillarytubemaybecomeblockedwithcontaminants.
AsanairconditionerusingR410AincurspressurehigherthanwhenusingR22,itisneces-
sarytochooseadequatematerials.
ThicknessesofcopperpipesusedwithR410Aareasshownintablebelow.Neverusecop-
perpipesthinnerthan0.8mmevenwhenitisavailableonthemarket.
Thicknesses of Annealed Copper Pipes
Pipe outside diameter Thickness
6.35mm(1/4in.) 0.80mm
9.52mm(3/8in.) 0.80mm
12.70mm(1/2in.) 0.80mm
15.88mm(5/8in.) 1.00mm
19.05mm(3/4in.) 1.20mm
WARNING
Do not use the existing (for R22) piping and are nuts.
Iftheexistingmaterialsareused,thepressureinsidetherefrigerantcyclewillriseand
causefailure,injury,etc.(UsethespecialR410Amaterials.)
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failure,injury,etc.
2.3. Power
WARNING
Alwaysuseaspecialbranchcircuitandinstallaspecialreceptacletosupplypowerto
theroomairconditioner.
Useacircuitbreakerandreceptaclematchedtothecapacityoftheairconditioner.
Donotextendthepowercable.
Performwiringworkinaccordancewithstandardssothattheairconditionercanbe
operated safely and positively.
Installaleakagecircuitbreakerinaccordancewiththerelatedlawsandregulations
andelectriccompanystandards.
The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3mmbetween
the contacts of each pole.
CAUTION
Thepowersourcecapacitymustbethesumoftheairconditionercurrentandthecur-
rentofotherelectricalappliances.Whenthecurrentcontractedcapacityisinsufcient,
change the contracted capacity.
Whenthevoltageislowandtheairconditionerisdifculttostart,contactthepower
companythevoltageraised.
2.4. Electric requirement
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220V(50Hz)
Operating range 198-264 V
Cable Cable size [mm
2
]
*1
Type Remarks
Powersupplycable 3.5
Type 60245
IEC66
2cable+Earth
(Ground),1ø220V
Connectioncable
1.5
Type 60245
IEC57
3cable+Earth
(Ground),1ø220V
*1
Selectedsample:Selectthecorrectcabletypeandsizeaccordingtothecountryor
region’s regulations.
Max.wirelength:Setalengthsothatthevoltagedropislessthan2%.Increasethe
wirediameterwhenthewirelengthislong.
Breaker Specication
*2
Circuitbreaker(overcurrent) Current:25(A)
Earthleakagebreaker Leakagecurrent:30mA0.1secorless
*3
*2
Selecttheappropriate breakerof thedescribedspecificationaccordingtothenational
or regional standards.
*3
Selectthebreakerthatenoughloadcurrentcanpassthroughit.
• 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3mminallpolesnearbythe
units.(Bothindoorunitandoutdoorunit)
• Installthecircuitbreakernearbytheunits.
2.5. Accessories
Name and Shape Q’ty Application
Installation Manual
1
Thismanual
Drain pipe
1
Foroutdoorunitdrainpipingwork
2.6. Limitation of refrigerant piping length
CAUTION
Thetotalmaximumpipelengthsandheightdifferenceofthisproductareshowninthe
table.
Iftheunitsarefurtherapartthanthis,correctoperationcannotbeguaranteed.
Pipe length
Maximum height
(between indoor and outdoor)
MAX. MIN.
25m 5m 15m
2.7. Additional charge
Refrigerantsuitableforapipinglengthof15mischargedintheoutdoorunitatthefactory.
Whenthepipingislongerthan15m,additionalchargingisnecessary.
Fortheadditionalamount,seethetablebelow.
Pipe length 15m 20m 25m
Additionalamount None 100 g 200 g
CAUTION
Whenaddingrefrigerant,addtherefrigerantfromthechargingportatthecompletion
ofwork.
Themaximumlengthofthepipingis25m.Themaximumheightdifferenceofthepiping
is15m,iftheunitsarefurtherapartthanthese,correctoperationcannotbeguaran-
teed.
Between15mand25m,whenusing aconnectionpipe otherthanthatinthetable,charge
additionalrefrigerantwith20g/1masthecriteria.
2.8. Selecting pipe sizes
Thediametersoftheconnectionpipesdifferaccordingtothecapacityoftheindoorunit.
Refer tothe followingtablefortheproper diametersoftheconnectionpipesbetween the
indoor and outdoor units.
Capacity of indoor unit
Gas pipe size
(thickness) [mm]
Liquid pipe size
(thickness) [mm]
18
ø12.7(0.8)
ø6.35(0.8)
CAUTION
Operationcannotbeguaranteedifthecorrectcombinationofpipes,valves,etc.,isnot
used to connect the indoor and outdoor units.
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2.9. Heat insulation around connection pipes
requirements
CAUTION
Installheatinsulationaroundboththegasandliquidpipes.
Failuretodosomaycausewaterleaks.
Useheatinsulationwithheatresistanceabove120°C.(Reversecyclemodelonly)
Inaddition,ifthehumiditylevelattheinstallationlocationoftherefrigerantpipingis
expectedtoexceed70%,installheatinsulationaroundtherefrigerantpiping.Ifthe
expectedhumiditylevelis70-80%,useheatinsulationthatis15mmorthickerandif
theexpectedhumidityexceeds80%,useheatinsulationthatis20mmorthicker.
Ifheatinsulationisusedthatisnotasthickasspecied,condensationmayformon
the surface of the insulation.
Inaddition,useheatinsulationwithheatconductivityof0.045W/(m·K)orless
(at20°C).
Connect the connection pipes according to “5.3. Connecting the piping” in this installation
manual.
3. INSTALLATION WORK
Makesuretoobtainthecustomer’sapprovalforselectingandinstallingtheoutdoorunit.
3.1. Selecting an installation location
WARNING
Securelyinstalltheoutdoorunitatalocationthatcanwithstandtheweightoftheunit.
Otherwise,theoutdoorunitmayfallandcauseinjury.
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.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thathasheatsources,vapors,ortheriskoftheleakageofammablegasinthe
vicinity.
•Areawheresmallanimalsmaylive.Itmaycausefailure,smokeorreifsmallani-
malsenterandtouchinternalelectricalparts.
•Areawhereanimalsmayurinateontheunitorammoniamaybegenerated.
(1) If possible,do not install theunit where it will be exposedto direct sunlight.
(Ifnecessary,Installablindthatdoesnotinterferewiththeairow.)
(2) Donotinstalltheunitwhereastrongwindblowsorwhereitisverydusty.
(3) Donotinstalltheunitwherepeoplepass.
(4) Takeyouneighborsintoconsiderationsothattheyarenotdisturbedbyairblowing
intotheirwindowsorbynoise.
(5) Providethespaceshowninguresothattheairowisnotblocked.Alsoforef-
cientoperation,leaveopenthreeofthefourdirectionsfront,rear,andbothsides.
(6) Installtheunitwherekeepawaymorethan1mfromtheantennaofTVsetand
Radio.
(7) Outdoorunit shouldbeset to aplacewhere both drainageanditself will notbe
affectedwhenheating.
3.2. 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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.
Sincethedrainwaterowsoutoftheoutdoorunitduringheatingoperation,installthedrain
pipeandconnectittoacommercial16mmhose.
Wheninstallingthedrainpipe,plugalltheholesotherthanthedrainpipemountingholein
thebottomoftheoutdoorunitwithputtysothereisnowaterleakage.
Outdoor unit
bottom
Drain hose
3.3. Installation dimensions
3.3.1. Outdoor unit installation
When the upper space is open (Unit:mm)
(1)Obstaclesatrearonly
100ormore
(2)Obstaclesatrearandsides
250ormore
100ormore
100ormore
(3)Obstaclesatfront
600ormore
(4)Obstaclesatfrontandrear
600ormore
100ormore
When an obstruction in the upper space (Unit:mm)
(1)Obstaclesatrearandabove
100ormore
Max.200
600ormore
(2)Obstaclesatrear,sides,andabove
600 or
more
250ormore
100ormore
Max.200
100ormore
3.3.2. Multiple outdoor unit installation
• Provideatleast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.
• Nomorethan3unitsmustbeinstalledsidebyside.
When3unitsormorearearrangedinaline,providethespaceasshowninthe
followingexamplewhenanobstructionintheupperspace.
When the upper space is open (Unit:mm)
(1)Obstaclesatrearonly
200ormore
(2)Obstaclesatfrontonly
1,000ormore
(3)Obstaclesatfrontandrear
200ormore
1,000ormore
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When an obstruction in the upper space (Unit:mm)
(1)Obstaclesat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.
1,500ormore
200ormore
Max.300
3.3.3. Outdoor units installation multi-row (Unit:mm)
(1)Singleparallelunitarrangement
100ormore
200ormore
500ormore
1,000ormore
(2)Multipleparallelunitarrangement
200ormore
400ormore
1,000ormore
2,000ormore
200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. INSTALLATION DIAGRAM
[OUTDOOR UNIT]
50mmormore
INDOOR UNIT
Power
supply
cable
Do not install directly on the
ground,thismayresultin
equipmentfailure.Makesurethe
heightofthebaseis50mmfrom
the ground.
Otherwise,thereisariskthatthe
drainagewaterwillfreezebetween
thedeviceandthesurface,
disablingdrainage.
Fixsecurelywithboltsonasolidblock.(Use4setsofcommerciallyavailableM10bolt,
nutandwasher.)
540mm
320mm
Bolt
Nut
Block
CAUTION
Donotinstalltheoutdoorunitintwo-stagewherethedrainwatercouldfreeze.Otherwise
thedrainagefromtheupperunitmayformiceandcauseamalfunctionofthelowerunit.
Whentheoutdoortemperatureis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ex-
tremelycoldclimate.
Inareawithheavysnowfall,iftheinletandoutletoftheoutdoorunit
isblockedwithsnow,itmightbecomedifculttogetwarm,andit
islikelytocauseproductmalfunction.Constructacanopyanda
pedestal,orplacetheunitonahighstandthatislocallyinstalled.
5. INSTALLATION
5.1.
Outdoor unit installation
Tappingscrew
Rearhooks
Connector cover
Fronthooks
Connector cover removal
•
Removethetappingscrew.
Installing the connector cover
(1)Afterinsertingthefourhooks,then
slide the cover.
(2)Tightenthetappingscrew.
WARNING
Installtheunitwhereitwillnotbetiltedbymorethan5°.
Wheninstallingtheoutdoorunitwhereitmayexposedtostrongwind,fastenitsecurely.
5.2.
Outdoor unit wiring
1. CONNECTION DIAGRAMS
N
L
3
1
3
2 2
1
Powersupply
Powerline
Outdoor unit
sideterminal
Indoor unit
sideterminal
EARTH
(GROUND)
EARTH
(GROUND)
EARTH(GROUND)
Earth(Ground)line
Control line
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2. CABLE PREPARATION
• 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.
Keeptheearth(ground)wirelongerthantheotherwires.
Earth(Ground)
wire
Connectioncable
andpowercable
45
mm
or
more
40
mm
How to connect wiring to the terminal
Caution when wiring cable
(1) Use ring terminals with insulating sleeves as shown in the gure 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.
(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.
(6) See the table below for the terminal screw tightening torques.
Strip:10mm
Wire
Terminalblocks
Ringterminal
Sleeve
Wire
Ringterminal
Screwwith
specialwasher
Screwwithspecialwasher
Ringterminal
Tightening torque [N·m (kgf·cm)]
M4screw 1.2to1.8(12to18)
3. OUTDOOR UNIT
(1) Removetheoutdoorunitconnectorcover.
(2) Bendtheendofthecableasshowninthegure.
(3) Connecttheendoftheconnectioncablefullyintotheterminalblock.
(4) Fastenthesheathwithacableclamp.
(5) Installtheconnectorcover.
Controlbox
Connection cable
Cableclamp
Earth(Ground)
screw
Earth(Ground)
screw
Cableclamp
Connectioncable
Powersupplycable
Connection cable wiring
Runtheconnectioncabletotherearoftheoutdoorunitwithinthe
A
rangeofthearrows
showninthefigure.
(Theconnectorcoverbecomesdifficulttoinstall.)
Connectioncable
10cm5cm
CAUTION
Beforestartingwork,checkthatpowerisnotbeingsuppliedtotheindoorunitand
outdoor unit.
Matchtheterminalblocknumbersandconnectioncablecolorswiththoseoftheindoor
unit.
Erroneouswiringmaycauseburningoftheelectricparts.
Connecttheconnectioncablermlytotheterminalblock.Imperfectinstallationmay
causeare.
Alwaysfastentheoutsidecoveringoftheconnectioncablewiththecordclamp.(Ifthe
insulatorischafed,electricleakagemayoccur.)
Securelyearth(ground)thepowercable.
Donotusetheearth(ground)screwforanexternalconnector.Onlyuseforintercon-
nectionbetweentwounits.
5.3. Connecting the piping
BENDING PIPES
(1) Whenbendingthepipe,becarefulnottocrushit.
(2) Topreventbreakingofthepipe,avoidsharp
bends.
Bend the pipe with a radius of curvature of
150mmorover.
(3) Ifthecopperpipe is bendthe pipe orpulled
tooften,itwillbecomestiff.Donotbendthe
pipesmorethanthreetimesatoneplace.
FLARING
(1) Cut the connectionpipe to the necessary
lengthwithapipecutter.
(2) Holdthepipedownward sothatcuttings will
notenterthepipeandremovetheburrs.
(3) Insertthearenutontothepipeandarethe
pipewithaaringtool.
Insert the flare nut (always use the flare nut
attachedtothe indoor andoutdoor units respectively) ontothepipeandperform theare
processingwithaaretool.
UsethespecialR410Aaretool,ortheconventional(forR22)aretool.
Whenusing the conventional are tool,always use an allowanceadjustmentgaugeand
securetheAdimensionshowninTable2.
CONNECTION
(1) Installtheoutdoorunitwallcap(suppliedwiththeoptionalinstallationsetorpro-
curedatthesite)tothewallpipe.
(2) Connecttheoutdoorunitandindoorunitpiping.
(3) 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.(Table1)
Tightenwithtwowrenches.
Torque
wrench
Wrench(xed)
Flare nut
Indoor unit pipe
Connection
pipe
Topreventgasleakage,coattheare
surfacewithrefrigeratoroil.
Table 1 Flare nut size and tightening torque
Flare nut [mm (in.)] Tightening torque [N•m (kgf•cm)]
6.35(1/4)dia. 16to18(160to180)
9.52(3/8)dia. 32to42(320to420)
12.70(1/2)dia. 49to61(490to610)
15.88(5/8)dia. 63to75(630to750)
19.05(3/4)dia. 90to110(900to1100)
Table 2 Pipe outside diameter
Pipe outside diameter
[mm (in.)]
Dimension A [mm]
Flare tool for R410A, clutch type
6.35(1/4)
0 to 0.5
9.52(3/8)
12.70(1/2)
15.88(5/8)
19.05(3/4)
Checkif[L]isareduniformlyand
isnotcrackedorscratched.
Die
A
Pipe
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CAUTION
Fastenaarenutwithatorquewrenchasinstructedinthismanual.Iffastenedtoo
tight,thearenutmaybebrokenafteralongperiodoftimeandcausealeakageof
refrigerant.
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2-wayor3-wayvalveopen.Thismaycauseabnormalpres-
sureintherefrigerationcyclethatleadstobreakageandeveninjury.
5.4. Air purge
Always use a vacuum pump to purge the air.
Refrigerant for purging the air is not charged in the outdoor unit at the factory.
Closethehighpressuresidevalveofthegaugemanifoldfullyanddonotoperateitduring
thefollowingwork.
CAUTION
Refrigerantmustnotbedischargedintoatmosphere.
Afterconnectingthepiping,checkthejointsforgasleakagewithgasleakdetector.
Gasleakchecksareperformedusingeithervacuumornitrogengas,soselecttheproper
one depending on the situation.
Checkinggasleakswithvacuum:
(1)Checkifthepipingconnectionsaresecure.
(2)Removethecapof3-wayvalve,andconnectthegaugemanifoldchargehosestothe
chargingportofthe3-wayvalve.
(3)Openthevalveofthegaugemanifoldfully.
(4)Operatethevacuumpumpandstartpumpdown.
(5)Check that the compound pressure gauge reads -0.1 MPa (-76 cmHg), operate the
vacuumpumpforatleast60minutes.
(6)At the end of pump down,close the valve of the gauge manifold fully and stop the
vacuumpump.
(Itchecksthatleaveasitisforabout10minutes,andaneedledoesnotreturn.)
(7)Disconnectthechargehosefromthe3-wayvalvechargingport.
(8)Remove the blank caps, and fully open the spindles of the 2-way and 3-way valves
withahexagonwrench.
[torque:6to7N·m(60to70kgf·cm)].
(9)Tightentheblankcaps andcharging portcap ofthe 2-wayvalveand3-wayvalveto
thespeciedtorque.
Checkinggasleakswithnitrogengas:
(1) Checkifthepipingconnectionsaresecure.
(2) Remove the cap of 3-way valve, and connect the gauge manifold charge hoses to
thechargingportofthe3-wayvalve.
(3) Pressurizewithnitrogengasusingthe3-wayvalvechargingport.
(4) Donotpressurizeuptothespeciedpressureallatoncebutdosogradually.
1
Increase the pressure up to0.5MPa (5 kgf/cm
2
),letit sit for about veminutes
andthencheckforanydecreaseinpressure.
2
Increasethepressureupto1.5MPa(15kgf/cm
2
),letitsitforaboutveminutes
andthencheckforanydecreaseinpressure.
3
Increasethepressureuptothespeciedpressure(thepressuredesignedforthe
product)andthenmakeanoteofit.
(5) Letitsit at thespecied pressure andifthere is nodecreasein pressure thenitis
satisfactory.Ifapressuredecreaseisconrmed,thereisaleak,soitisnecessaryto
specifytheleaklocationandmakeminoradjustments.
(6) Dischargethenitrogengasandstartingremovingthegaswithavacuumpump.
(7) Openthevalveofthegaugemanifoldfully.
(8) Operatethevacuumpumpandstartpumpdown.
(9) Checkthatthecompoundpressuregaugereads -0.1MPa (-76cmHg),operatethe
vacuumpumpforatleast60minutes.
(10) Attheend ofpumpdown, close thevalveof the gaugemanifoldfully andstopthe
vacuumpump.
(11) Disconnectthechargehosefromthe3-wayvalvechargingport.
(12) Removetheblankcaps,andfullyopenthespindlesofthe2-wayand3-wayvalves
withahexagonwrench.
[torque:6to7N·m(60to70kgf·cm)].
(13) Tightentheblankcapsandchargingportcapofthe2-wayvalveand3-wayvalveto
thespeciedtorque.
3-wayvalve
2
-
way
valve
Charging
port
cap
Vacuumpump
Charge
hose
Charge hose
Charging
port
Blankcap
Valvestem
Flare nut
Compoundpressuregauge
Gaugemanifold
Pressure gauge
High
pressure
side valve
(closed)
Low
pressure
side
valve
-0.1 MPa
(-76cmHg
-1bar)
Tightening torque
Blank cap
6.35mm(1/4in) 20to25N·m(200to250kgf·cm)
9.52mm(3/8in.) 20to25N·m(200to250kgf·cm)
12.70mm(1/2in.) 28to32N·m(280to320kgf·cm)
15.88mm(5/8in.) 30to35N·m(300to350kgf·cm)
19.05mm(3/4in.) 35to40N·m(350to400kgf·cm)
Charging port cap 12.5to16N·m(125to160kgf·cm)
5.5. Test run
1. Make a TEST RUN in accordance with installation instruction sheet for the
indoor unit.
CHECK ITEMS
INDOOR UNIT
(1) Isoperationofeachbuttonontheremotecontrolunitnormal?
(2)Doeseachlamplightnormally?
(3)Dotheairflow-directionlouveroperatenormally?
(4)Isthedrainnormal?
(5)Isthereanyabnormalnoiseandvibrationduringoperation?
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?
• Donotoperatetheairconditionerinthetestrunningstateforalongtime.
• Fortheoperationmethod,refertotheoperatingmanualandperformoperationcheck.
6. PUMP DOWN
6.1. 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coolingoperationor forced coolingoperationaccording
tothefollowingprocedure.(Whenthecoolingoperationcannotstartinwinter,andsoon,
starttheforcedcoolingoperation.).
(1) Dotheairpurgingofthechargehosebyconnectingthecharginghoseofgaugemani-
foldtothechargingportof3wayvalveandopeningthelow-pressurevalveslightly.
(2) Closethevalvestemof2wayvalvecompletely.
(3) Startthecoolingoperationorfollowingforcedcoolingoperation.Keeponpressingthe
MANUALAUTObuttonoftheindoorunitformorethan10seconds.Theoperationin-
dicatorlampandtimerindicatorlampwillbegintoflashsimultaneouslyduringtestrun.
(TheforcedcoolingoperationcannotstartiftheMANUALAUTObuttonisnotkepton
pressingformorethan10seconds.)
(4) Closethevalve stemof 3 wayvalvewhen the reading on thecompound pressure
gagebecomes0.05~0Mpa(0.5~0kg/cm
2
).
(5) Stoptheoperation.
•PresstheSTART/STOPbuttonoftheremotecontrolunittostoptheoperation.
•PresstheMANUALAUTObuttonwhenstoppingtheoperationfromindoorunitside.(It
isnotnecessarytopressonkeepingformorethan10seconds.)
CAUTION
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valveopen.Thismaycauseabnormalpressureintherefrigerationcyclethat
leadstobreakageandeveninjury.
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