Mitsubishi Electric MXZ-3B24NA User manual

Category
Power heat guns
Type
User manual

This manual is also suitable for

Split-type Air-Conditioner
MXZ-3B24NA
MXZ-3B30NA
MXZ-4B36NA
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Installation Manual For INSTALLER
This manual only describes the installation of outdoor unit.
When installing the indoor unit, refer to the installation manual of indoor unit.
Any structural alterations necessary for installation must comply with local build-
ing code requirements.
Notice d’installation
Destinée à l
INSTALLATEUR
Cette notice ne décrit que l’installation de l’appareil extérieur.
Lors de l’installation de l’appareil intérieur, consultez la notice d’installation de cet
appareil.
Toute altération structurelle requise pour l’installation doit être conforme aux exi-
gences du code du bâtiment local.
Manual de instalación Para el INSTALADOR
En este manual sólo se describe la instalación de la unidad exterior.
Para instalar la unidad interior, consulte el manual de instalación de dicha uni-
dad.
 Cualquiermodicaciónestructuralnecesariaparallevaracabolainstalaciónde-
berácumplirlasnormasdeedicaciónlocales.
JG79A417H01_en.indd 1 10/12/2010 9:19:43 AM
En-1
n Do not install the unit by yourself (user).
 Incompleteinstallationcouldcausereorelectricshock,injuryduetotheunit
falling,orleakageofwater.Consultthedealerfromwhomyoupurchasedthe
unitoraqualiedinstaller.
n Perform the installation securely referring to the installation manual.
 Incompleteinstallationcouldcausereorelectricshock,injuryduetotheunit
falling,orleakageofwater.
n Install the unit securely in a place which can bear the weight of the unit.
If the installation location cannot bear the weight of the unit, the unit could fall
causinginjury.
n Perform electrical work according to the installation manual and be sure
to use an exclusive circuit. Do not connect other electrical appliances to
the circuit.
 Ifthecapacityofthepowercircuitisinsufcientorthereisincompleteelectri-
calwork,itcouldresultinareoranelectricshock.
n Do not damage the wires by applying excessive pressure with parts or
screws.
 Damagedwirescouldcausere.
n Be sure to cut off the main power in case of setting up the indoor P.C.
board or wiring works.
 Failuretodosocouldcauseelectricshock.
n Usethespeciedwirestoconnecttheindoorandoutdoorunitssecure-
lyandattachthewiresrmlytotheterminalblockconnectingsections
so the stress of the wires is not applied to the sections.
 Incompleteconnectingandsecuringcouldcausere.
n Donotinstalltheunitinaplacewhereinammablegasmayleak.
 Ifgasleaksandaccumulatesintheareaaroundtheunit,itcouldcausean
explosion.
n Do not use intermediate connection of the power cord or the extension
cord and do not connect many devices to one AC outlet.
 Itcouldcause areoranelectricshock duetodefectivecontact,defective
insulation, exceeding the permissible current, etc.
n Besuretousethepartsprovidedorspeciedpartsfortheinstallation
work.
 Theuseofdefectivepartscouldcauseaninjuryorleakageofwaterduetoa
re,anelectricshock,theunitfalling,etc.
n When plugging the power supply plug into the outlet, make sure that
there is no dust, clogging, or loose parts in both the outlet and the plug.
Make sure that the power supply plug is pushed completely into the out-
let.
If there is dust, clogging, or loose parts on the power supply plug or the outlet,
itcouldcauseelectricshockorre.Ifloosepartsarefoundonthepowersup-
ply plug, replace it.
n Attach the electrical cover to the indoor unit and the service panel to
the outdoor unit securely.
 Iftheelectricalcoveroftheindoorunitand/ortheservicepaneloftheout-
door unit are not attached securely, it could result in a re or an electric
shockduetodust,water,etc.
n When installing or relocating the unit, make sure that no substance
otherthanthespeciedrefrigerant(R410A)enterstherefrigerantcir-
cuit.
Any presence of foreign substance such as air can cause abnormal pres-
sure rise or an explosion.
n Do not discharge the refrigerant into the atmosphere. If refrigerant
leaks during installation, ventilate the room.
 Ifrefrigerantcomesincontactwithare,harmfulgascouldbegenerated.Re-
frigerantleakagemaycausesuffocation.Ventilatetheroom.
n Check that the refrigerant gas does not leak after installation has been
completed.
 Ifrefrigerantgasleaksindoors,andcomesintocontactwiththeameofa
fanheater,spaceheater,stove,etc.,harmfulsubstanceswillbegenerated.
n Use appropriate tools and piping materials for installation.
The pressure of R410A is 1.6 times more than R22. Not using appropriate
tools or materials and incomplete installation could cause the pipes to burst
orinjury.
n When pumping down the refrigerant, stop the compressor before dis-
connecting the refrigerant pipes.
If the refrigerant pipes are disconnected while the compressor is running
andthestopvalveisopen,aircouldbedrawninandthepressureinthere-
frigeration cycle could become abnormally high. This could cause the pipes
toburstorinjury.
n When installing the unit, securely connect the refrigerant pipes before
starting the compressor.
If the compressor is started before the refrigerant pipes are connected and
whenthestopvalveisopen,aircouldbedrawninandthepressureinthe
refrigeration cycle could become abnormally high. This could cause the
pipestoburstorinjury.
n Fastenaarenutwithatorquewrenchasspeciedinthismanual.
 Iffastenedtootight,aarenutmaybreakafteralongperiodandcausere-
frigerantleakage.
n The unit shall be installed in accordance with national wiring regula-
tions.
n Ground the unit correctly.
Do not connect the ground to a gas pipe, water pipe, lightning rod or tel-
ephoneground.Defectivegroundingcouldcauseelectricshock.
1-2.SPECIFICATIONS
1. BEFOREINSTALLATION
1-1.THEFOLLOWINGSHOULDALWAYSBEOBSERVEDFORSAFETY
• Besuretoread“THEFOLLOWINGSHOULDALWAYSBEOBSERVEDFORSAFETY”beforeinstallingtheairconditioner.
• Besuretoobservethewarningsandcautionsspeciedhereastheyincludeimportantitemsrelatedtosafety.
• Afterreadingthismanual,besuretokeepittogetherwiththeOPERATINGINSTRUCTIONSforfuturereference.
CAUTION (Couldleadtoseriousinjuryinparticularenvironmentswhenoperatedincorrectly.)
n Depending on the installation area, install a Ground Fault Interrupt (GFI)
circuit breaker.
 IftheGroundFaultInterrupt(GFI)circuitbreakerisnotinstalled,anelectric
shockcouldoccur.
n Perform the drainage/piping work securely according to the installation
manual.
 Ifthereisdefectinthedrainage/pipingwork,watercoulddropfromtheunit,
soakinganddamaginghouseholdgoods.
n Donottouchtheairinletorthealuminumnsoftheoutdoorunit.
 Thiscouldcauseinjury.
n Do not install the outdoor unit where small animals may live.
If small animals enter and touch the electric parts inside the unit, it could
causeamalfunction,smokeemission,orre.Also,adviseusertokeepthe
area around the unit clean.
WARNING (Couldleadtodeath,seriousinjury,etc.)
RequiredToolsforInstallation
Phillipsscrewdriver
Level
Scale
Utilityknifeorscissors
Torque wrench
Wrench(orspanner)
4mm(5/32in.)hexagonal
wrench
Flare tool for R410A
Gauge manifold for R410A
VacuumpumpforR410A
Charge hose for R410A
Pipe cutter with reamer
ENGLISH
CONTENTS
1. BEFORE INSTALLATION ............................................................1
2. OUTDOOR UNIT INSTALLATION ...............................................4
3.FLARINGWORKANDPIPECONNECTION ...............................5
4.PURGINGPROCEDURES,LEAKTEST,ANDTESTRUN .........5
5. RELOCATION AND MAINTENANCE ..........................................7
Model
Power supply Pipe length and height difference
*1,*2,*3,*4,*5,*6
RatedVoltage Frequency Max. pipe length per indoor
unit/formulti-system Max. height difference
*7 Max. no. of bends per in-
doorunit/formultisystem
RefrigerantadjustmentA
*8
MXZ-3B24NA
MXZ-3B30NA
MXZ-4B36NA
208/230V 60 Hz 25m(82ft)/70m(230ft) 15m(49ft) 25/70 20g/m(1.08ozeach5ft)
*1Neverusepipeswith thickness lessthanspecied.The pressure resist-
ancewillbeinsufcient.
*2 Use a copper pipe or a copper-alloy seamless pipe.
*3Becarefulnottocrushorbendthepipeduringpipebending.
*4Refrigerantpipebendingradiusmustbe100mm(4in.)ormore.
*5Insulationmaterial:Heatresistingfoamplastic0.045specicgravity
*6Besureto use the insulationofspeciedthickness. Excessive thickness
maycauseincorrectinstallationoftheindoorunitandinsufcientthickness
may cause dew drippage.
*7 If the outdoor unit is installed higher than the indoor unit, max. height differ-
enceisreducedto10m(33ft).
*8Ifpipelengthexceeds40m(131ft),additionalrefrigerant(R410A)charge
is required. (No additional charge is required for pipe length less than
40m(131ft).)
 Additionalrefrigerant(m)=A×(pipelength(m)40)
Additionalrefrigerant(ft) =A×(pipelength(ft)131)
5
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1-4.SELECTINGTHEINSTALLATIONLOCATION
Where it is not exposed to strong wind.
• Whereairowisgoodanddustless.
• Whererainordirectsunshinecanbeavoidedasmuchaspossible.
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.
When installing the unit, be sure to secure the unit legs.
• Whereitisatleast3m(10ft.)awayfromtheantennaofTVsetorradio.
OperationoftheairconditionermayinterferewithradioorTVreceptionin
areaswherereceptionisweak.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.
Note:
Itisadvisabletomakeapipingloopnearoutdoorunitsoastoreducevibra-
tion transmitted from there.
Note:
When operating the air conditioner in low outside temperature, be sure to
follow the instructions 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recommendedtoinstallabafeboardon
the air outlet side of the outdoor unit.
Avoidthefollowingplacesforinstallationwhereairconditionertroubleisli-
able to occur.
• Whereammablegascouldleak.
Where there is much machine oil.
Salty places such as the seaside.
• Wheresuldegasisgeneratedsuchasahotspring.
Where there is high-frequency or wireless equipment.
• WherethereisemissionofhighlevelsofVOCs,includingphthalatecom-
pounds,formaldehyde,etc.,whichmaycausechemicalcracking.
3. Obstaclesinfront(blowing)only
Whenthereisanobstacleinfrontoftheunitasshowninthegure,open
spaceabove,behind,andonthesidesoftheunitisrequired.
2. Front (blowing) side open
Aslongasspaceindicatedinthegureisprovided,itisallowedtoinstall
the unit where obstacles are behind and on the sides of the unit. (No ob-
stacleabovetheunit)
FREESPACEREQUIREDAROUNDOUTDOORUNIT
Servicespace
When installing the unit in an area that is enclosed with walls such as a
verandah,besuretohaveenoughspaceasshownbelow.
In this case, the air conditioning capacity and power consumption might
deteriorate.
When installing two or more units, do not install the units in front or be-
hind each other.
1.Obstaclesabove
When there is no obstacle in front and on the sides of the unit, it is allowed
toinstall the unit whereanobstacleis above the unitonlyif the space
showninthegureisprovided.
6. Service space
Providespaceforserviceandmaintenanceasshowninthegure.
500(19-11/16)ormore
100(3-15/16)ormore
5. Obstaclesinfront,behindandonside(s)
(Unit:mm(inch))
Heightoftheobstacleis1200(47-1/4)orless
500(19-11/16)ormore
100(3-15/16)ormore
500(19-11/16)
or more
350(13-25/32)ormore
100(3-15/16)ormore
350(13-25/32)ormore
100(3-15/16)ormore
200(7-7/8)ormore
350(13-25/32)ormore
100(3-15/16)
or more
200(7-7/8)ormore
350(13-25/32)
or more
500(19-11/16)
or more
500(19-11/16)
or more
4. Obstaclesinfrontandbehind
The unit can be used by attaching an optional outdoor blowing guide
(MAC-856SG)(butbothsidesandtopareopen).
100(3-15/16)ormore
Blowingguide(MAC-856SG)
500(19-11/16)ormore
1-3.SELECTINGOPTIONALDIFFERENT-DIAMETERJOINTS
Ifthediameterofconnectionpipedoesnotmatchtheportsizeofoutdoorunit,useoptionaldifferent-diameterjointsaccordingtothefollowingtable.
Port size of outdoor unit Optionaldifferent-diameterjoints(portsizeofoutdoorunitdiameterofconnectionpipe)
MXZ-3B MXZ-4B Liquid/Gas 6.35(1/4)9.52(3/8):PAC-493PI
9.52(3/8)12.7(1/2):MAC-454JP
9.52(3/8)15.88(5/8):PAC-SG76RJ
12.7(1/2)9.52(3/8):MAC-A455JP
12.7(1/2)15.88(5/8):MAC-A456JP
Refer to the installation manual of indoor unit for the diameter of connection pipe of indoor unit.
A UNIT 6.35(1/4)/12.7(1/2)
B - C UNIT B - D UNIT 6.35(1/4)/9.52(3/8)
(Unit:mm(inch))
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1-5.INSTALLATIONDIAGRAM
Units should be installed by licensed contractor according to
local code requirements.
Aftertheleaktest,applyinsulat-
ing material tightly so that there is
no gap.
When the piping is to be at-
tached to a wall containing metals
(tinplated) ormetalnetting, use
a chemically treated wooden
piece20mm(25/32in.)orthicker
between the wall and the piping
or wrap 7 to 8 turns of insulation
vinyltapearoundthepiping.
To use existing piping, perform
COOLoperationfor30minutes
andpumpdownbeforeremoving
theoldairconditioner.Remake
areaccording tothe dimension
for new refrigerant.
PARTSTOBEPROVIDEDATYOURSITE
(A) Power supply cord* 1
(B) Indoor/outdoorunitconnectingwire* 1
(C) Extension pipe 1
(D) Wallholecover 1
(E) Piping tape 1
(F)
Extensiondrainhose(orsoftPVC
hose,15mm(19/32in.)inner
diameterorhardPVCpipeVP16)
1
(G) Refrigeration oil Little
amount
(H) Putty 1
(I) Pipexingband 2 to 7
(J) Fixingscrewfor(I) 2 to 7
(K) Wallholesleeve 1
* Note:
Place indoor/outdoor unit connecting wire (B) and
powersupplycord(A)atleast1m(3ft.)awayfrom
theTVantennawire.
The“Q’ty”for(B)to(K)intheabovetableisquan-
tity to be used per indoor unit.
More than
100 mm
(3-15/16in.)
Open as a rule
More than 500 mm
(19-11/16in.)ifthe
front and both sides
are open
Morethan100mm(3-15/16in.)
Morethan200mm(7-7/8in.)
if there are obstacles to both
sides
Open as a rule
Morethan500mm(19-11/16in.)ifthe
back,bothsidesandtopareopen
Morethan350mm
(13-25/32in.)
Outdoorunitinstallation
Air inlet
Air outlet
Air inlet
900(35-7/16)
500(19-11/16)
200(7-7/8)
2-U-shape notched holes
(BaseboltM10)
320
(12-19/32)
2-12(15/32)×36(1-31/32)ovalholes
(BaseboltM10)
355
(13-31/32)
387(15-1/4)
Unit:mm(inch)
JG79A417H01_en.indd 3 10/12/2010 9:19:44 AM
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2. OUTDOORUNITINSTALLATION
2-1.INSTALLINGTHEUNIT
Fix here with
M10 bolts.
Makethesetting
depth deeper.
Makewithwider.
Anchor leg
25(31/32)orless
Anchor both length Anchor both pitch
(Unit:mm(inch))
• Besuretoxtheunit’slegswithboltswheninstallingit.
• Besuretoinstalltheunitrmlytoensurethatitdoesnotfallbyanearthquakeoragust.
• Refertothegureintherightforconcretefoundation.
• Donotusethedrainsocketandthedraincapsinthecoldregion.Drainmayfreezeanditmakesthefanstop.
500
(19-11/16)
330(13)
2-2.CONNECTINGWIRESFOROUTDOORUNIT
Be sure to use special circuits for room air conditioner.
• Wiringworkshouldbebasedonapplicabletechnicalstandards.
Wiring connections should be made following the diagram.
Screws should be tightened so they won’t loosen.
ELECTRICAL SPECIFICATIONS
OUTDOOR UNIT MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA
Powersupply(V,PHASE,Hz) 208/230,1,60
Max.Fusesize(timedelay)(A) 20 25
Min.CircuitAmpacity(A) 18 23
Fanmotor(F.L.A) 0.93 0.93
Compressor (R.L.A) 11 14.4
(L.R.A) 15 15
Controlvoltage Indoorunit-Remotecontroller:(Wireless)
Indoorunit-Outdoorunit:DC12-24V
35mm
(1-3/8in.)
15 mm
(5/8in.)
Lead wire
1)Removetheservicepanel.
2)Removetheconduitcover.
3)Attachtheconduitconnectortoconduitcoverwithlocknutthense-
cure it to the unit with screws.
4)ConnectgroundwirestotheTBsupport.
5)Loosenterminal screw, and connect indoor/outdoor unit connecting
wire(B)fromtheindoorunitcorrectlyontheterminalblock.Becareful
nottomakemis-wiring.Fixthewiretotheterminalblocksecurelyso
thatnopartofitscoreisappeared,andnoexternalforceisconveyed
totheconnectingsectionoftheterminalblock.
6)Firmly tighten the terminal screwstopreventthemfromloosening.
Aftertightening,pullthewireslightlytoconrmthattheydonotmove.
7)Perform5)and6)foreachindoorunit.
8)Connectpowersupplycord(A).
9)Closetheservicepanel securely.Makesurethat3-2. PIPE CON-
NECTION is completed.
• Aftermakingconnectionsbetweenbothpowersupplycord(A)and
indoor/outdoor unit connecting wire (B), be sure to x both cable
and wire with cable clamps.
Connecting order
• Connecttheterminalblockin
following order.
ABCDP
CONNECTINGWIRESANDCONNECTINGGROUNDWIRE
Use solid conductor AWG14 or stranded conductor AWG14.
• Usedoubleinsulatedcopperwirewith600Vinsulation.
Use copper conductors only.
* Follow local electrical code.
POWERSUPPLYCABLEANDGROUNDWIRE
• Use solid or stranded conductor AWG14 (MXZ-3B)/AWG12 (MXZ-
4B).
Use copper conductors only.
* Follow local electrical code.
WARNING:
Use the indoor/outdoor unit connecting wire that meets the Stand-
ardstoconnecttheindoor and outdoor units and x thewireto
the terminal block securely so that no external force is conveyed
to the connecting section of the terminal block. An incomplete
connectionorxingofthewirecouldresultinare.
Remark:
* Adisconnectswitchshouldberequired.Checkthelocalcode.
** Use a ring tongue terminal in order to connect a ground wire to terminal. Connect wires to the matching numbers of terminals.
Be sure to attach each screw to its correspondent terminal
when securing the cord and/or the wire to the terminal block.
Terminalblock
Grounding
terminal **
208/230VAC
1phase60Hz
Grounding
terminal **
Terminalblock1 Ground
OUTDOOR UNIT
Power supply
208/230VAC
1 phase 2 wires 60 Hz
Disconnect
switch * Grounding
terminal **
Terminalblock Terminalblock
INDOOR UNIT
Terminalblock
Forfutureservicing,giveextralengthtotheconnectingwires.
Servicepanel
Screws 4B36NA
Terminalblock
for power supply
Power supply
Terminalblockfor
indoor/outdoorunit
A – C D
Locknut
Conduitcover
Connector
Dunitisfor4B36NAonly
Dunitisfor4B36NAonly
A – C D
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3-2.PIPECONNECTION
1)Applyathincoatofrefrigerationoil(G)tothearedendsofthepipesand
the pipe connections of the outdoor unit.
2)Alignthecenterofthepipewiththatofthepipeconnectionsoftheoutdoor
unit,thenhandtightenthearenut3to4turns.
3)Tightenthearenutwithatorquewrenchasspeciedinthetable.
• Over-tighteningmaycausedamagetothearenut,resultinginrefriger-
antleakage.
Be sure to wrap insulation around the piping. Direct contact with the bare
piping may result in burns or frostbite.
3-3.INSULATIONANDTAPING
1)Coverpipingjointswithpipecover.
2)Foroutdoorunitside,surelyinsulateeverypipingincludingvalves.
3)Usingpipingtape(E),applytapingstartingfromtheentryofoutdoorunit.
• Stoptheendofpipingtape(E)withtape(withadhesiveagentattached).
• Whenpipinghavetobearrangedthroughaboveceiling,closetorwhere
the temperature and humidity are high, wind additional commercially sold
insulationtopreventcondensation.
WARNING
When installing the unit, securely
connect the refrigerant pipes before
starting the compressor.
CAUTION
When there are the ports which are
not used, make sure their nuts are
tightened securely.
Fig. 1 Fig. 2 Fig.3
Fig. 4 Fig. 5 Fig. 6
TiltedUnevenBurred
Good No good
Burr Copper pipe
Spare reamer
Pipe cutter
Smooth all
around
Evenlength
all around
Inside is shin-
ing without any
scratches.
Flare nut
Die Copper pipe
Clutch type
Flaring tool
Wing nut type
Copper
pipe
Pipe diameter
[mm(inch)]
Nut
(mm)
A[mm(inch)] Tightening torque
Clutch type tool for R410A Clutch type tool for R22 Wing nut type tool for R22 N•m kgf•cm ft•Ib
ø6.35(1/4) 17
0 to 0.5
(0to0.02)
1.0 to 1.5
(0.04to0.06)
1.5 to 2.0
(0.06to0.08)
13.7to17.7 140 to 180 10to13
ø9.52(3/8) 22 34.3to41.2 350to420 25to30
ø12.7(1/2) 26 2.0 to 2.5
(0.08to1.0)
49.0 to 56.4 500 to 575 36to42
ø15.88(5/8) 29 73.5to78.4 750 to 800 54 to 58
3. FLARINGWORKANDPIPECONNECTION
3-1.FLARINGWORK
1)Cutthecopperpipecorrectlywithpipecutter.(Fig.1,2)
2)Completelyremoveallburrsfromthecutcrosssection
ofpipe.(Fig.3)
• Aimthecopper pipedownwardwhileremovingburrs
topreventburrsfromdroppinginthepipe.
3)Removearenutsattachedtoindoorandoutdoorunits,
thenputthem onpipehavingcompletedburrremoval.
(Notpossibletoputthemonafteraringwork.)
4)Flaringwork (Fig.4,5).Firmlyholdcopperpipeinthe
dimension shown in the table. Select A mm from the
table according to the tool selected.
5)Check
• ComparethearedworkwithFig.6.
• Ifareisnotedtobedefective,cutoffthearedsec-
tionanddoaringworkagain.
4-1.PURGINGPROCEDURESANDLEAKTEST
4. PURGINGPROCEDURES,LEAKTEST,ANDTESTRUN
1)Removeserviceportcapofstopvalveonthesideoftheoutdoorunitgas
pipe.(Thestopvalvesarefullyclosed andcoveredincaps intheirinitial
state.)
2)Connectgaugemanifoldvalveandvacuum pump to service portofstop
valveonthegaspipesideoftheoutdoorunit.
3)Runthevacuumpump.(Vacuumizeformorethan15minutes.)
4)Checkthevacuumwithgaugemanifoldvalve,thenclosegaugemanifold
valve,andstopthevacuumpump.
5)Leave as it is for one or two minutes. Make sure the pointer of gauge
manifoldvalveremainsinthesameposition.Conrmthatpressuregauge
shows 0.101MPa[Gauge](760mmHg)(30in.Hg).
6)Removegaugemanifoldvalvequicklyfromserviceportofstopvalve.
7)Fullyopen all stop valves on the gas pipe and the liquid pipe. Operating
without fully opening lowers the performance and this causes trouble.
8)Referto1-2.,andchargetheprescribed amountofrefrigerantifneeded.
Be sure to charge slowly with liquid refrigerant. Otherwise, composition of
the refrigerant in the system may be changed and affect performance of
the air conditioner.
9)Tightencapofserviceporttoobtaintheinitialstatus.
10
)Leaktest
Serviceportcap
(Torque13.7to
17.7 N•m, 140 to
180kgf•cm, 10 to
13ft•lb)
Stopvalve
for GAS
Stopvalvecap
(Torque 19.6 to 29.4 N•m,
200to300kgf•cm,15to
22ft•lb)
Gauge manifold
valve(forR410A)
Compound pressure
gauge(forR410A)
–0.101MPa
[–760 mmHg
(–30in.Hg)]
Handle
Low
Handle High
Vacuumpump
(forR410A)
Charge hose
(forR410A)
*Close
*Open
Hexagonal wrench
*4 to 5 turns
Stopvalve
for LIQUID
Pressure gauge
(forR410A)
Precautions when using
thecontrolvalve
Whenattachingthecontrolvalveto
theserviceport,valvecoremayde-
form or loosen if excess pressure is
applied.Thismaycausegasleak.
Serviceport
Charge hose
(forR410A)
Body
Close
Open
Control
valve
A
Whenattachingthecontrolvalveto
theserviceport,makesurethatthe
valvecoreisinclosedposition,and
then tighten part A. Do not tighten
partAorturnthebodywhenvalve
core is in open position.
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4-3.TESTRUN
• Testruns of the indoorunitsshould be performedindividually.See the installation manual
comingwiththeindoorunit,andmakesurealltheunitsoperateproperly.
If the test run with all the units is performed at once, possible erroneous connections of the
refrigerantpipesandtheindoor/outdoorunitconnectingwirescannotbedetected.Thus,be
sure to perform the test run one by one.
About the restart protective mechanism
Oncethecompressorstops,therestartpreventivedeviceoperatessothecompressorwillnot
operatefor3minutestoprotecttheairconditioner.
Wiring/piping correction function
Thisunithas awiring/pipingcorrectionfunctionwhich correctswiringandpipingcombination.
Whenthereispossibilityofincorrectwiringandpipingcombination,andconrmingthecombi-
nationisdifcult,usethisfunctiontodetectandcorrectthecombinationbyfollowingtheproce-
dures below.
Makesurethatthefollowingisdone.
Power is supplied to the unit.
• Stopvalvesareopen.
Note:
During detection, the operation of the indoor unit is controlled by the outdoor unit. During detec-
tion, the indoor unit automatically stops operation. This is not a malfunction.
4-2.GASCHARGE
Perform gas charge to unit.
1)Connectgascylindertotheserviceportofstopvalve.
2)Performairpurgeofthepipe(orhose)comingfromrefrigerantgascylinder.
3)Replenishspeciedamountoftherefrigerant,whileoperatingtheairconditionerforcooling.
Note:
Incaseofaddingrefrigerant,complywiththequantityspeciedfortherefrigeratingcycle.
CAUTION:
When charging the refrigerant system with additional refrigerant, be sure to use liquid refriger-
ant. Adding gas refrigerant may change the composition of the refrigerant in the system and
affect normal operation of the air conditioner. Also, charge the liquid refrigerant slowly, otherwise
thecompressorwillbelocked.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm water (under
40°C(140°F))duringcoldseason.Butneverusenakedreorsteam.
Procedure
Pressthepiping/wiringcorrectionswitch(SW871)1minuteormoreafterturningonthepower
supply.
Correction completes in 10 to 15 minutes. When the correction is completed, its result is
shown by LED indication. Details are described in the following table.
• Tocancelthisfunctionduringitsoperation,pressthepiping/wiringcorrectionswitch(SW871)
again.
• Whenthecorrectioncompletedwithouterror,donotpressthepiping/wiringcorrectionswitch
(SW871)again.
Whentheresultwas“cannotbecorrected”,pressthepiping/wiringcorrectionswitch(SW871)
againtocancelthisfunction.Then,conrmthewiringandpipingcombinationinaconventional
manner by operating the indoor units one by one.
• Theoperationisdonewhilethepowerissupplied.Makesurenottocontactpartsotherthan
theswitch,includingtheP.C.board.Thismaycauseelectricshockorburnbyhotpartsand
livepartsaroundtheswitch.ContactingthelivepartsmaycauseP.C.boarddamage.
• TopreventelectroniccontrolP.C.boarddamage,makesuretoperformstaticeliminationbe-
fore operating this function.
• Thisfunctiondoesnotoperatewhentheoutsidetemperatureis0°C(32°F)orbelow.
LEDindicationduringdetection:
LED
1(Red) 2(Yellow) 3(Green)
Lighted Lighted Blinking
Resultofpiping/wiringcorrectionfunction
LED Result
1(Red) 2(Yellow) 3(Green)
Lighted Not lighted Lighted Completed
(Correctedsuccessfully)
Blinking Blinking Blinking Cannot be corrected
Other indications
Refer to “SAFETY PRE-
CAUTIONS WHEN LED
FLASHES”locatedbehind
theservicepanel.
4-4.EXPLANATIONTOTHEUSER
• UsingtheOPERATINGINSTRUCTIONS,explaintotheuserhowtousetheairconditioner(howtousetheremotecontroller,howtoremovetheairlters,howto
removeorputtheremotecontrollerintheremotecontrollerholder,howtoclean,precautionsforoperation,etc.).
Recommend the user to read the OPERATING INSTRUCTIONS carefully.
Union
Stopvalve
Liquid
pipe
Indoor
unit
Stopvalvewith
serviceport Gas
pipe
Refrigerant gas
cylinder
operatingvalve
(forR410A) Gauge manifold
valve(forR410A)
Charge hose
(forR410A)
Refrigerant gas cylinder for R410A with siphon
Electronic scale for refrigerant charging
Refrigerant(liquid)
Outdoor
unit
Union
Union
Union
D unit is for
4B36NAonly
JG79A417H01_en.indd 6 10/12/2010 9:19:47 AM
En-7
5. RELOCATIONANDMAINTENANCE
5-1.PUMPINGDOWN
When relocating or disposing of the air conditioner, pump down the system following the procedure below so that refrigerant is not released into the atmosphere.
1)Connectthegaugemanifoldvalvetotheserviceportofthestopvalveonthegaspipesideoftheoutdoorunit.
2)Fullyclosethestopvalveontheliquidpipesideoftheoutdoorunit.
3)Closethestopvalveonthegaspipesideoftheoutdoorunitalmostcompletelysothatitcanbeeasilyclosedfullywhenthepressuregaugeshows0MPa[Gauge]
(0lbf/in.2[0kgf/cm2]).
4)StarttheemergencyCOOLoperationonalltheindoorunits.
To start the emergency operationinCOOLmode,disconnectthepowersupplyplugand/orturnoffthebreaker.After15seconds,connectthepowersupplyplug
and/orturnonthebreaker,andthenpresstheE.O.SWonce.(Theemergency COOL operationcanbeperformedcontinuouslyforupto30minutes.)
5)
Fullyclosethestopvalveonthegaspipesideoftheoutdoorunitwhenthepressuregaugeshows0.05to0MPa[Gauge](approx.7.25to0lbf/in
2
[0.5to0kgf/cm
2
]).
6)Stoptheemergency COOL operation.
 Tostopoperation,presstheE.O.SWseveraltimesuntilallLEDlampsturnoff.Refertooperatinginstructionsfordetails.
When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes. The compressor may burst if air etc. get into it.
WARNING
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Mitsubishi Electric MXZ-3B24NA User manual

Category
Power heat guns
Type
User manual
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