Fujitsu AOMG18LBLA Installation guide

Brand: Fujitsu

Model: AOMG18LBLA

Type: Installation guide

Fujitsu AOMG18LBLA is an air conditioner designed for efficient cooling and heating in residential spaces. With its powerful performance, it quickly cools or heats your room to the desired temperature, creating a comfortable indoor climate. The unit's advanced features include:

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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theamountofresidual

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

]

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

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

Circuitbreaker(overcurrent) Current:25(A)

Earthleakagebreaker Leakagecurrent:30mA0.1secorless

Selecttheappropriate breakerof thedescribedspecificationaccordingtothenational

or regional standards.

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

Thismanual

Drain pipe

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]

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

(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

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

2 2

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



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

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

Pipe

9377863423-02_IM.indb 5 18/02/2019 14:06:58

En-6

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.

Increase the pressure up to0.5MPa (5 kgf/cm

),letit sit for about veminutes

andthencheckforanydecreaseinpressure.

Increasethepressureupto1.5MPa(15kgf/cm

),letitsitforaboutveminutes

andthencheckforanydecreaseinpressure.

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

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 coolingoperationaccording

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 stemof 3 wayvalvewhen the reading on thecompound pressure

gagebecomes0.05~0Mpa(0.5~0kg/cm

(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.

9377863423-02_IM.indb 6 18/02/2019 14:06:58

Fujitsu AOMG18LBLA Installation guide

Fujitsu AOMG18LBLA Installation guide

Fujitsu AOMG18LBLA Installation guide

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