Me (Cool/Heat)rpm1,290/1,410—
Hi (Cool/Heat)rpm1,440/1,560660
Tube materialCopperCopper
Fin materialAluminium(PreCoat)Aluminium(BlueCoated)
Fin TypeSlitFinCorrugatedFin
Row / Stage(Platefinconfiguration,forceddraft)
Me (Cool/Heat)rpm1,330/1,440—
Hi (Cool/Heat)rpm1,520/1,610700/680
Tube materialCopperCopper
Fin materialAluminium(PreCoat)Aluminium(BlueCoated)
Fin TypeSlitFinCorrugatedFin
Row / Stage(Platefinconfiguration,forceddraft)
Inverter control, which equipped with a microcomputer in determining the most suitable operating modeastimepasses,
automatically adjusts output power for maximum comfort always. In order to achieve the suitable operatingmode,the
microcomputer maintains the set temperature by measuring the temperature of the environment andperformingtemperature
shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputeratindoorunitthat
judging the condition according to internal setting temperature and intake air temperature.
8.1.1. Internal Setting Temperature
Once the operation starts, remote control setting temperature will be taken as basevaluefortemperatureshiftingprocesses.
These shifting processes are depend ing on the air conditioner settings and the operationenvironment.Thefinalshiftedvalue
will be used as internal setting temperature and it is updated continuously whenevertheelectricalpowerissuppliedtotheunit.
Values of T1, T2, and T3 depend on remote control setting temperature, as shown in below table. After the adjustment of T1, T2
and T3 values, the operation mode for that particular environment and remote control setting is judged and performed, based on
the above operation mode chart, every 30 minutes.
The operation mode chart for this example is as shown in below figureandtheoperationmodetobeperformedwilldependon
indoor intake air temperature and outdoor air temperature at the timewhenthejudgmentismade.
2. Controlofairflowdirectioncanbeautomatic(anglesofdirectionisdeterminedbyoperationmode,heatexchanger temperature
andintakeairtemperature)andmanual(anglesofdirectioncanbeadjustedusingremotecontrol).
VerticalAirflow
OperationModeAirflowDirectionVaneAngle (°)
12345
HeatingAutowithHeatExchanger17
Temperature58
7
Manual717334967
Cooling,SoftDryandFan,IonAuto7~37
Manual717253341
ModeJudgmentinAutoAuto7
Manual717253341
24
1. Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated
above. For heating mode operation, the angle of the vane depends on the indoor heat exchanger temperature as Figure 1
below. When the air conditioner is stopped using remote control, the vane will shift to close position.
2. Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated aboveandthe
positions of the vane are as Figure 2 below. When the air conditioner is stopped using remote control, thevanewillshiftto
close position.
Horizontal Airflow
1. Automatic horizontal airflow direction can be set using remotecontrol;thevaneswingsleftandrightwithintheanglesas
stated below. For heating mode operation, the angle ofthevanedependsontheindoorheatexchangertemperatureas
Figure 1 below.
When the powerful mode is selected, the internal setting temperature will shift to achieve the setting temperature quickly.
(a) Cooling Operation
(b) Soft Dry Operation
(c) Heating Operation
8.1.12. Delay ON Timer Control
Delay ON timer can be setusingremotecontrol,theunitwithtimersetwillstartoperateearlierthanthesettingtime.Thisisto
provide a comfortable environmentwhenreachingthesetONtime.
Seventy minutes beforethesettime,indoor(atfanspeedofLo-)andoutdoorfanmotorstartoperatefor30secondstodetermine
the indoor intakeairtemperatureandoutdoorairtemperatureinordertojudgetheoperationstartingtime.
From theabovejudgment,thedecidedoperationwillstartoperateearlierthanthesettimeasshownbelow.
8.1.13. DelayOFFTimerControl
DelayOFFtimercanbesetusingremotecontrol,theunitwithtimersetwill stop operate at set time.
28
8.1.14. Auto Restart Control
1. When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within threetofour
minutes (there are 10 patterns between 2 minutes 58 seconds and 3 minutes 52 seconds to be selected randomly)afterpower
supply resumes.
2. This type of control is not applicable during ON/OFF Timer setting.
4.Whentheswitchispressedbetween11to16secondsandtogetherwiththesignal from remote control, the unit can be
changedtodifferentcontrollingsetting(4typeoftransmissioncodes).
5.Whentheswitchispressedbetween16to21seconds,either“H14”error detection selection mode or the remote control signal
receivingsoundcanbecancelledorturnedon.
29
8.1.17. Indoor Power Relay Control
Power relay will turn on during operation or in progress of stopping operation. Although operation stops, the power relay continues
on for three minutes.
However, during instantaneous power failure (< 0.5s), power relay will turn off. Then, it will turn on 2 minutes after powerrecover
and the unit will operate as previous operation condition.
8.1.18. Ionizer Operation
Purpose
To provide fresh air effect to users by discharging minus ion to air.
Control Condition
a. Ionizer Only Operation.
1. When air-conditioner unit is at “OFF” condition(standby)andIONoperationbuttonatremotecontrolispressed.
Fan & ionizer on, ION LED illuminates,butpowerLEDmaintainoff.(1→2)
However, fan speed can be adjustedlaterbycustomerduringthisoperation.
4. The first30minutesofcoolingoperation,(A)willbeapplied.
32
8.2.1.4. IPM (Power transistor) Prevention Control
A. Overheating Prevention Control
1. When the IPM temperature rises to 110°C, compressor operation will stop immediately.
2. Compressor operation restarts after three minutes the temperature decreases to 95°C.
B. DC Peak Current Control
1. When electric current to IPM exceeds set value of 25.0 ± 4.0 A, the compressor will stop operate.Then,operationwillrestart
after three minutes.
2. If the set value is exceeded again more than 30 seconds after the compressorstarts,theoperationwillrestartaftertwo
minute.
3. If the set value is exceeded again within 30 seconds after the compressorstarts,theoperationwillrestartafteroneminute.
If this conditio n repeats continuously for seven times, all indoor andoutdoorrelayswillbecutoff.
8.2.1.5. Compressor Overheating PreventionControl
Instructed frequency for compressor operation will beregulatedbycompressortoptemperature.Thechangesoffrequencyareas
below figure.
• Thiscontroliscancelledafterstartedfor420minutes,orremotecontrolsettingtemperatureorfanspeed setting is changed.
b)Control2
• Whenthefollowingconditionsoccursfor20minutescontinuously,anti-dewformationis controlled and air vane change
Horizontalvaneshiftto2ndpositionandVerticalvaneshifttocenterposition.
Indoor fan speed varies in accordance to indoor heat exchanger temperature, based on type of air volume and direction,asshown
below.
1. Manual Fan Speed
2. Auto FanSpeed
37
Note:
a. UP:
• If move from Lo, the fan speed will be shifted to Maximum 1520 rpm (E21CK), 1480 rpm (E18CK).
• If move from Maximum, the fan speed no change.
• In up zone, 10 rpm is added for every 10s until Maximum 1520 rpm (E21CK), 1480 rpm (E18CK).
b. DOWN:
• The fan speed will be decreased one step every 10 sec. until Minimum 1270 rpm.
c. Current Output Fixed:
• Maintain at present fan speed.
d. Instantaneous Maximum:
• Fan speed will be increased to maximum auto fan speed.
e. Temperature in ( ) is for Powerful Mode operation.
8.2.3.2. Intake Air Temperature Control
Compressor will operate at maximum of 128 Hz respectivelyifeitheroneofthebelowconditionsoccur:
1. When the indoor intake air temperature is above10°CandremotecontrolsettingfanspeedislowerMe-.
2. When the indoor intake air temperature is30°Corabove.
8.2.3.3. Outdoor Air TemperatureControl
The compressor operatingfrequencyisregulatedinaccordancetotheoutdoorairtemperatureasshowninthebelowfigures.This
control will begin oneminuteafterthecompressorstarts.
38
8.2.3.4. Overload Protection Control
The compressor operating frequency is regulated in accordance to indoor heat exchan ger temperature as shown in below figures.
8.2.3.5. Outdoor Temperature Control
• Outdoor temperature is detected and the following control isperform.
• Control operates after more than 1 minute the compressorhasstarted.
39
8.2.3.6. Deice Control
A. Deice operation (Normal Deice Operation)
1. Detection methods
Outdoor heat exchanger temperature sensor, timer.
2. Deice operation time chart
Notes
a. Duringdeiceoperation,therelationshipbetweenoutdoorpipetemperatureandtimeT1issuchoperationwill
proceedtonextstage.
b. Thedeicewillbeperformedonlyafter1hourfromwhentheoperationhasstarted.
c. WhenComp.OFFbythesequenceNo.1,6,7compressorcanrestartbackwithout3minuteswaits(immediate
restart).
Outdoorheatexchangertemperature
a15°Cb18°Cc25°C
40
3. Explanation of operation
1) Before the deice is started, compressor frequency is set to the specified value for T0-timer.
2) After deice is started, the 4-way valve, OD Fan and ID fan are OFF.
3) After 4-way valve is OFF for 30 s, compressor frequency is set to the specified value.
4) Before deice is ended, if the outdoor heat exchanger temperature exceeds a°C, set compressor frequency andexpansionvalvetothe
specified values.
5) When outdoor heat exchanger temperature exceeds b°C, or 10.5 minutes has passed since the 4-wayvalveisOFF,operationattimer
T5 will be started.
6) After the above 5) operation, if the specified time has passed, the deice operation ending signalwillbeproduced.Thecomp.Hzisset
to the specified value and at the same time outdoor fan motor ON signal is produced.
7) After T6 the deice ending signal is produced, 4-way valve is set to ON, indoor fan is ON,CompressorfrequencyisFREE,andreturnto
normal heating operation.
4. Deice operation judgement condition
When any of below a, b, c, d condition is satisfied, deice signalisproduced.
a. Continuously, outdoor heat exchanger temperature <3°Cfor120minutesandoutdoorheatexchangertemperature<
-5°C for 3 minutes and outdoor air temperature >-1°CandComp.isON.
b. Continuously, outdoor heat exchanger temperature<3°Cfor80minutesandoutdoorheatexchangertemperature<-
6°C for 3 minutes and outdoor air temperature>-1°CandComp.isON.
c. Continuously, outdoor heat exchangertemperature<3°Cfor40minutesandoutdoorheatexchangertemperature<-
7°C and outdoor air temperature
-3°Cfor3minutesandComp.isON.
d. Continuously, outdoorheatexchangertemperature<3°Cfor40minutesandoutdoorheatexchangertemperature<-
8°C for 3 minutes andoutdoorairtemperature<-3°CandComp.isON.
However, the firstdeicewillstartonlyafterminimumof60minutesinoperation.
Do NOT insert finger or other objects into the unit! —> especially dangerous for children!
50
47 / 48
47 / 48
44
45
46
46
46
47
47
51
10 Installation And Servicing Air Conditioner Using R410A
10.1. OUTLINE
10.1.1. About R410A Refrigerant
1. Converting air conditioners to R410A
Since it was declared in1974 that chlorofluoroca rbons (CFC), hydro chlorofluorocarbons (HCFC) and other substancesposea
destructive danger to the ozone layer in the earth´s upper stratosphere (20 to 40 km above the earth),measureshavebeen
taken around the world to prevent this destruction.
The R22 refrigerant which has conventionally been used in ACs is an HCFC refrigerant and, therefore,possessesthisozone-
destroying potential. International regulations (the Montreal Protocol Ozone-Damaging Substances)andthedomesticlawsof
various countries call for the early substitution of R22 by a refrigerant which will not harm theozonelayer.
• In ACs, the HFC refrigerant which has become the mainstream alternative called R410A.ComparedwithR22,thepressure
of R410A is approximately 1.6 times as high at the same refrigerant temperature,buttheenergyefficiencyisaboutthe
same. Consisting of hydrogen (H), fluorine (F) and carbon (C), R410A is an HFC refrigerant.AnothertypicalHFCrefrigerant
is R407C. While the energy efficiency of R407C is some what inferior to thatofR410A,itofferstheadvantageofhaving
pressure characteristics which are about the same as those of R22, and isusedmainlyinpackagedACs.
2. The characteristics of HFC (R410A) refrigerants
a. Chemical characteristics
The chemical characteristics of R410A are similar to thoseofR22inthatbotharechemicallystable,non-flammable
refrigerants with low toxicity.
However, just like R22, the specific gravity of R410A gasisheavierthanthatofair.Becauseofthis,itcancauseanoxygen
deficiency if it leaks into a closed room since it collectsinthelowerareaoftheroom.Italsogeneratestoxicgaswhenitis
directly exposed to a flame, so it must be used inawellventilatedenvironmentwhereitwillnotcollect.
Table1PhysicalcomparisonofR410AandR22
Composition (wt%)R32/R125(50/50)R22(100)
Boiling point (°C)-51.4-40.8
Vaporizing pressure (25°C)1.56Mpa(15.9kgf/cm2)0.94Mpa(9.6kgf/cm2)
Saturated vapor density64.0kg/m
FlammabilityNon-flammableNon-flammable
Ozone-destroying point (ODP)00.005
Global-warming point(GWP)17301700
R410AR22
3
44.4kg/m
3
b. Compositionalchange(pseudo-azeotropiccharacteristics)
R410A isapseudo-azeotropicmixturecomprisingthetwocomponentsR32andR125.Multi-componentrefrigerantswith
thesechemicalcharacteristicsexhibitlittlecompositionalchangeevenfromphasechangesduetovaporization9or
condensation),whichmeansthatthereislittlechangeinthecirculatingrefrigerantcompositionevenwhentherefrigerantleaksfromthegaseoussectionofthepiping.Accordingly,R410Acanbehandledinalmostthesamemannerasthesingle-componentrefrigerantR22.However,whencharging,becausethereisaslightchangeincompositionbetweenthegasphaseandtheliquidphaseinsideacylinder or
othercontainer,chargingshouldbasicallybeginwiththeliquidside.
c. Pressurecharacteristics
AsseeninTable2,thegaspressureofR410Aisapproximately1.6timesashighasthatofR22atthesame refrigerant
temperature,whichmeansthatspecialR410Atoolsandmaterialswithhigh-pressurespecificationsmust be used for all
refrigerantpipingworkandservicing.
Conventionally, mineral oil or a synthetic oil such as alkylbenzene has been used for R22 refrigerating machine oil. Because
of the poor compatibility between R410A and conventional oils like mineral oil, however, there is a tendencyforthe
refrigerating machine oil to collect in the refrigerating cycle. For this reason, polyester and other synthetic oils whichhave
a high compatibility with R410A are used as refrigerating machine oil.
Because of the high hygroscopic property of synthetic oil, more care must be taken in its handling than wasnecessarywith
conventional refrigerating machine oils. Also, these synthetic oils will degrade if mixed with mineral oiloralkylbenzene,
causing clogging in capillary tubes or compressor malfunction. Do not mix them under any circumstances.
10.1.2. Safety Measure When Installing / Receiving Refrigerant Piping
Cause the gas pressure of R410A is approximately 1.6 times as high as that of R22, a mistakeininstallationorservicingcould
result in a major acciden t. It is essential that you use R410a tools and materials, and thatyouobservethefollowingprecautions
to ensure safety.
1. Do not use any refrigerant other than R410A in ACs that have been used with R410A.
2. If any refrigerant gas leaks while you are working, ventilate the room. Toxic gasmaybegeneratedifrefrigerantgasisexposed
to a direct flame.
3. When installing or transferring an AC, do not allow any air or substanceotherthanR410Atomixintotherefrigerationcycle.If
it does, the pressure in the refrigeration cycle can become abnormallyhigh,possiblycausinganexplosionand/orinjury.
4. After finishing the installation, check to make sure there is no refrigerantgasleaking.
5. When installing or transferring an AC, follow the instructionsintheinstallationinstructionscarefully.Incorrectinstallationcan
result in an abnormal refrigeration cycle or water leakage,electricshock,fire,etc.
6. Do not perform any alterations on the AC unit underanycircumstances.Haveallrepairworkdonebyaspecialist.Incorrect
repairs can result in an water leakage, electric shock,fire,etc.
10.2. TOOL FOR INSTALLING/SERVICINGREFRIGERANTPIPING
10.2.1. Necessary Tools
In order to prevent an R410A AC frommistakenlybeingchargedwithanyotherrefrigerant,thediameterofthe3-wayvalveservice
port on the outdoor unit has beenchanged.Also,toincreaseitsabilitytowithstandpressure,theopposingdimensionshavebeen
changed for the refrigerant pipeflaringsizeandflarenut.Accordingly,wheninstallingorservicingrefrigerantpiping,youmusthave
both the R410A and ordinarytoolslistedbelow.
Forotherinstallationwork,youshouldhavetheusualtools,suchasscrewdrivers(+,-),ametal-cuttingsaw,an electrical drill, a hole
coredrill(65or70dia.),atapemeasure,alevel,athermometer,aclampmeter,aninsulationtester,avoltmeter, etc.
TypeofworkOrdinarytoolsR410A tools
RefrigerantchargingElectronicscale for refrigerant charging
Refrigerantcylinder Charging orifice and
packingfor refrigerant cylinder
*1)Alwaysreplacethedryeroftheoutdoorunitatthesametime.Thereplacement dryer is wrapped in a vacuum pack. Replace
itlastamongtherefrigeratingcycleparts.Startbrazingassoonasyouhaveopened the vacuum pack, and begin the vacuuming
operationwithin2hours.
53
10.2.2. R410A Tools
1. Cooper tube gauge for clearance adjustment
(used when flaring with the conventional flaring tool (clutch
type))
• This gauge makes it easy to set the clearance for the
copper tube to 1.0-1.5 mm from the clamp bar of the
flaring tool.
2. Flaring tool (clutch type)
• In the R410A flaring tool, the receiving hole for the
clamp bar is enlarged so the clearance from the clamp
bar can be set to 0-0.5 mm, and the spring inside the
tool is strengthened to increase the strength of the pipeexpanding torque. This flaring tools can also be used
with R22 piping, so we recommend that you select it if
you are buying a new flaring tool.
• The pressure resistance of the charging hose has been
raised to match the higher pressure of R410A. The hose
material has also been changed to suit HFC use, and
the size of the fitting has been changed to match the
manifold ports.
Fig. 4 Manifoldgaugecharginghose
Table 8 Difference between R410A and conventional charginghoses
Pressure
resistance
MaterialNBR rubberHNBRrubberNyloncoatinginside
Working pressure3.4 MPa (35 kgf/cm3)5.1MPa(52kgf/cm3)
Bursting pressure17.2 MPa (175kgf/cm3)27.4MPa(280kgf/cm3)
Conventional hosesR410Ahoses
6. Vacuum pump adaptor
• When using a vacuum pump for R410A, it is necessary
to install an electromagnetic valve to prevent the
vacuum pump oil from flowing back into the charging
hose. The vacuum pump adaptor is installedforthat
purpose. if the vacuum pump oil (mineral oil)becomes
mixed with R410A, it will damage the unit.
7. Electric gas leak detectorforHFCrefrigerant
• The leak detectorandhalidetorchthatwereusedwith
CFC andHCFCcannotbeusedwithR410A(because
thereisnochlorineintherefrigerant).
• Because of the high pressure and fast vaporizing speed
of R410A, the refrigerant cannot be held in a liquid
phase inside the charging cylinde r when charging is
done using the charging cylinde r method, causing
bubbles to form in the measurement scale glass and
making it difficult to see the reading. (Naturally, the
conventional R22 charging cylinde r cannot be used
because of the differences in the pressure resistance,
scale gradation, connecting port size, etc.)
• The electronic scale has been strengthened by using a
structure in which the weight detector for the refrigerant
cylinder is held by four supports. It is also equipped with
two connection ports, one for R22 *7/16 UNF, 20
threads) and one for R410A (1/2 UNF, 20 threads), so
it can also be used for conventional refrigerant charging.
• There are two types of electronic scales, one for 10-kg
cylinders and one for 20-kg cylinders. (The 10-kg
cylinder is recommended.)
Refrigerant charging is done manually by opening and
closing the valve.
9. Refrigerant cylinders
• The R410A cylinders are labeled with the refrigerant
name, and the coating color of the cylinde r protectoris
pink, which is the color stipulated by ARI of theU.S.
• Cylinder equipped with a siphon tube are availableto
allow the cylinder to stand upright for liquidrefrigerant
charging.
It is recommended that you use copper and copper alloy jointless pipes with a maximum oil adherence of 40 mg/10m.Donotused
pipes that are crushed, deformed, or discolored (especially the inside surface). If these inferior pipes are used, impuritiesmayclog
the expansion valves or capillaries.
Because the pressure of ACs using R410A is higher than those using R22, it is essential that you selectmaterialsthatare
appropriate for these standards.
The thickness of the copper tubing used for R410A is shown in Table 10. Please be aware that tubingwithathicknessofonly0.7
mm is also available on the market, but this should never be used.
Table 10 Difference between R410A and conventional copper tube
10.3.2. Processing and Connecting Piping Materials
When working with refrigerant piping, the following points must
be carefully observed: no moisture od dust must be allowed to
enter the piping, and there must be no refrigerant leaks.
1. Procedure and precautions for flaring work
a. Cut the pipe
Use a pipe cutter, and cut slowly so the pipe willnotbe
deformed.
b. Remove burrs and clean shavings from thecutsurface
If the shape of the pipe end is poor afterremovingburrs,
or if shavings adhere to the flaredarea,itmayleadto
refrigerant leaks.
To prevent this, turn the cutsurfacedownwardand
remove burrs, then cleanthesurface,carefully.
c. Insert the flare nut (besuretousedthesamenutthatis
used on the AC unit)
d. Flaring
Check the clampbarandthecleanlinessofthecopper
pipe.
Be suretosuedtheclampbartodotheflaringwith
accuracy.UseeitheranR410Aflaringtool,oraconventionalflaringtool.flaringtoolscomeindifferentsizes,sobesuretocheckthesizebeforeusing.Whenusingaconventionalflaringtool,usethecopperpipegaugeforclearanceadjustment,etc.,toensurethecorrectAdimension(seeFig.10)
Fig.10Flaringdimensions
Fig.11Relationbetweentheflarenutstructure and flaring tool end
Table 13 R410A flaring and flare nut dimensions Unit: mm
Wall thickness
(mm)
Table 14 R410A flaring and flare nut dimensionsUnit:mm
Wall thickness
(mm)
Table 12 R410A flaring dimensions
Wall thickness
(mm)
A +0, -0.4B
A +0, -0.4B
R410A flaring
tool, clutch type
dimension
dimension
A (mm)
Conventional flaringtool
Clutch typeWing-nuttype
C
dimension
C
dimension
D
dimension
D
dimension
Flarenut
width
Flarenut
width
2. Procedure and precautions for flare connection
a. Check to make sure there are no scratches, dust,etc.,ontheflareandunion.
b. Align the flared surface with the axial centeroftheunion.
c. Use a torque wrench, and tighten to thespecifiedtorque.ThetighteningtorqueforR410Aisthesameastheconventional
torque value for R22. Be careful, becauseifthetorqueistooweak,itmayleadtoagasleak.Ifitistoostrong,itmaysplit
the flare nut or make it impossibletoremovetheflarenut.
1. Types ofpipingandtheirstorage
The followingisageneralclassificationoftherefrigerantpipematerialsusedforACs.
BecausethegaspressureofR410Aisapproximately1.6timesashighasthatofR22,copperpipeswith the thickness shown
inTable10,andwithminimalimpuritiesmustbeused.Caremustalsobetakenduringstorageto ensure that pipes are not
crushed,deformed,orscratched,andthatnodust,moistureorothersubstanceentersthepipeinterior. When storing sheathed
copperpipesorplaincopperpipes,sealtheopeningsbypinchingortapingthemsecurely.
2. Makingsandmanagement
a. Sheathedcopperpipesandcopper-elementpipes
Whenusingthesepipes,checktomakesurethattheyarethestipulatedthickness. For flare nuts, be sure to used the same
nutthatisusedontheACunit.
58
b. Copper pipes
Use only copper pipes with the thickness given in table 10, and with minimal impurities. Because the surface of the pipe is
exposed, you should take special care, and also take measures such as marking the pipes to make sure they areeasily
distinguished from other piping materials, to prevent mistaken use.
3. Precautions during refrigerant piping work
Take the following precautions on-site when connecting pipes. (Keep in mind that the need to control the entryofmoistureand
dust is even more important that in conventional piping).
a. Keep the open ends of all pipes sealed until connection with AC equipment is complete.
b. Take special care when doing piping work on rainy days. The entering of moisture will degrade therefrigeratingmachineoil,
and lead to malfunctions in the equipment.
c. Complete all pipe connections in as short a time as possible. If the pipe must be left standingforalongtimeafterremoving
the seal, it must be thoroughly purged with nitrogen, or dried with a vacuum pump.
10.4. INSTALLATION, TRANSFERRING, SERVICING
10.4.1. Inspecting Gas Leaks with a Vacuum Pump forNewInstallations(UsingNew
Refrigerant Piping)
1. From the viewpoint of protecting the global environment, please donotreleaserefrigerantintotheatmosphere.
a. Connect the projecting side (pin-pushing side) of the charginghoseforthemanifoldgaugetotheserviceportofthe3-way
valve. (1)
b. Fully open the handle Lo of the manifold gauge andrunthevacuumpump.(2)(Iftheneedleofthelow-pressuregauge
instantly reaches vacuum, re-check step a).)
c. Continue the vacuum process for at least 15 minutes,thenchecktomakesurethelow-pressuregaugehasreached-0.1
MPa (-76 cmHg). Once the vacuum processhasfinished,fullyclosethehandleLoofthemanifoldgaugeandstopthe
vacuum pump operation, then remove thecharginghosethatisconnectedtothevacuumpumpadaptor.(Leavetheunitin
that conditio n for 1-2 minutes, and makesurethattheneedleofthemanifoldgaugedoesnotreturn.)(2)and(3)
d. Turn the valve stem of the 2-way valve90counter-clockwisetoopenit,then,after10seconds,closeitandinspectforagas
leak (4)
e. Remove the charging hose fromthe3-wayvalveserviceport,thenopenboththe2-wayvalveand3-wayvalve.(1)(4)(Turn
the valve stem in the counter-clockwisedirectionuntilitgentlymakescontact.Donotturnitforcefully).
f. Tighten the service portcapwithatorquewrench(18N.m(1.8kgf.m)).(5)Thentightenthe2-wayvalveand3-wayvalve
caps with a torquewrench(42N.m(4.2kgf.m))or(55N.m(5.5kgf.m)).
g. After attachingeachofthecaps,inspectforagasleakaroundthecaparea.(5)(6)
10.4.2. Transferring (Using New Refrigerant Piping)
1. Removing the unit
a. Collecting the refrigerant into the outdoor unit by pumping down
The refrigerant can be collected into the outdoor unit (pumping down) by pressing the TEST RUN button, even whenthe
temperature of the room is low.
• Check to make sure that the valve stems of the 2-way valve and 3-way valve have been opened by turningthemcounter-
clockwise. (Remove the valve stem caps and check to see that the valve stems are fully opened position.Alwaysuse
a hex wrench (with 4-mm opposing sides) to operate the valve stems.)
• Press the TEST RUN button on the indoor unit, and allow preliminary for 5-6 minutes. (TEST RUNmode)
• After stopping the operation, let the unit sit for about 3 minutes, then close the 2-way valvebyturningthevalvestemin
the clockwise direction.
• Press the TEST RUN button on the indoor unit again, and after 2-3 minutes of operation,turnthevalvestemofthe3-
way valve quickly in the clockwise direction to close it, then stop the operation.
• Tighten the caps of the 2-way valve and 3-way valve to the stipulated torque.
• Remove the connection pipes (liquid side and gas side).
2. Installing the unit
Install the unit using new refrigerant piping. Follow the instructions in section4.1toevacuatethepipesconnectingtheindoor
and outdoor units, and the pipes of the indoor unit, and check for gas leaks.
10.4.3. AC Units Replacement (Using ExistingRefrigerantPiping)
When replacing and R410A AC unit with another R410A ACunit,youshouldre-flaretherefrigerantpiping.Eventhoughthe
replacement AC unit uses the R410A, problems occur when,forexample,eithertheACunitmakerortherefrigeratingmachineoil
is differen t.
When replacing an R22 AC unit with an R410A ACunit,thefollowingchecksandcleaningproceduresarenecessarybutare
difficult to do because of the chemical characteristicsoftherefrigeratingmachineoil(asdescribedinitemsc)andd)ofsection
10.1.1.(2)). In this case, you should use new refrigerantpipingratherthantheexistingpiping.
1. Piping check
Because of the different pressure characteristicsofR22andR410A,thedesignpressurefortheequipmentis1.6times
different. the wall thickness of thepipingmustcomplywiththatshowninTable10,butthisisnoteasytocheck.Also,evenif
the thickness is correct, there maybeflattenedorbentportionsmidwaythroughthepipingduetosharpcurves.Buriedsections
of the piping also cannot bechecked.
2. Pipe cleanin g
A large quantity of refrigeratingmachineoil(mineraloil)adherestoexistingpipesduetotherefrigerationcyclecirculation.Ifthe
pipes are used justastheyarefortheR410Acycle,thecapacitywillbeloweredduetotheincompatibilityofthisoilwiththe
R410A, or irregularitiesmayoccurintherefrigerationcycle.Forthisreason,thepipingmustbethoroughlycleaned,butthisis
difficult withthepresenttechnology.
2. Connectthecharginghosetothevacuumpumpadaptor.Atthistime,fullyopenthe2-way valve and 3-way valve.
3.FullyopenthehandleLoofthemanifoldgauge,turnonthepowerofthevacuumpump and continue the vacuum process for
atleastonehour.
4. Confirmthatthelowpressuregaugeshowsareadingof-0.1Mpa(-76cmHg),then fully close the handle Lo, and turn off the
vacuumpump.Waitfor1-2minutes,thenchecktomakesurethattheneedleof the Low pressure gauge has not returned. See
Fig.13fortheremainingstepsofthisprocedure.
60
5. Set the refrigerant cylinde r onto the electronic scale, then correct the hose the cylinder and to the connection port for the
electronic scale. (1)(2)
Precaution:
Be sure to set up the cylinder for liquid charging. If you use a cylinder equipped with a siphon tube, you can chargetheliquid
without having to turn the cylinder around
6. Remove the charging hose of the manifold gauge from the vacuum pump adaptor, and connect it to the connectionportofthe
electronic scale. (2)(3)
7. Open the valve of the refrigerant cylinder, then open the charging valve slightly and close it. Next, pressthecheckvalveofthe
manifold gauge and purge the air. (2)(4) (Watch the liquid refrigerant closely at this point.)
8. After adjusting the electronic scale to zero, open the charging valve, then open the valve Lo ofthemanifoldgaugeandcharge
with the liquid refrigerant. (2)(5) (Be sure to read the operating instructions for the electronicscale.)
9. If you cannot charge the stipulated amount, operate the unit in the cooling mode whilechargingalittleoftheliquidatatime
(about 150 g/time as a guideline). If the charging amount is insufficient from one operation,waitaboutoneminute,thenusethe
same procedure to do the liquid charging again.
Precaution:
Never use the gas side to allow a larger amount of liquid refrigerant tobechargedwhileoperatingtheunit.
10. Close the charging valve, and after charging the liquid refrigerant insidethecharginghose,fullyclosethevalveLoofthe
manifold gauge, and stop the operation of the unit. (2)(5)
11. Quickly remove the charging hose from the service port. (6) If youstopmidwaythrough,therefrigerantthatisinthecyclewill
be discharged.
12. After putting on the caps for the service port and operatingvalve,inspectaroundthecapsforagasleak.(6)(7)
Fig.13Re-chargingrefrigerant
61
10.4.6. Brazing
As brazing requires sophisticated techniques and experiences, it must be performed by a qualified person.
In order to prevent the oxide film from occurring in the pipe interior during brazing, it is effective to proceed with brazing while letting
dry nitrogen gas (N2) flow.
<Brazing Method for Preventing Oxidation>
1. Attach a reducing valve to the nitrogen gas cylinder.
2. Attach a reducing valve to the nitrogen gas cylinder.
3. Apply a seal onto the clearance between the piping and inserted pipe for the nitrogen gas in order to preventthenitrogengas
from flowing backward.
4. When the nitrogen gas is flowing, be sure to keep the piping end open.
3
5. Adjust the flow rate of nitrogen gas so that it is lower than 0.05 m
6. After taking the steps above, keep the nitrogen gas flowing until the piping cools down toacertainextent(i.e.temperatureat
which pipes are touchable with finger).
7. Completely remove the flux after brazing.
/h, or 0.02 MPa (0.2 kgf/cm2)bymeansofthereducingvalve.
Cautions during brazing
1. General Caution s
a. The brazing strength shouldbehighasrequired.
b. After operation, airtightnessshouldbekeptunderpressurizedcondition.
c. During brazing do notallowcomponentmaterialstobecomedamagedduetooverheating.
d. The refrigerant pipeworkshouldnotbecomeblockedwithscaleorflux.
e. The brazed partshouldnotrestricttheflowintherefrigerantcircuit.
f. No corrosionshouldoccurfromthebrazedpart.
2. PreventingofOverheating
Due toheating,theinteriorandexteriorsurfacesoftreatedmetalmayoxidize.Especially,whentheinterioroftherefrigerant
circuitoxidizesduetooverheating,scaleoccursandstaysinthecircuitasdust,thusexertingafatallyadverseeffect.So,makebrazingatadequatebrazingtemperatureandwithminimumofheatingarea.
3. OverheatingProtection
Inordertopreventcomponentsnearthebrazedpartfromoverheatingdamagedorqualitydeteriorationduetoflameorheat,
takeadequatestepsforprotectionsuchas(1)byshieldingwithametalplate,(2)byusingawetcloth,and(3)by means
ofheatabsorbent.
Inordertoimprovethebrazingefficiency,varioustypesofantioxidantareavailableonthe market. However, the
constituentsofthesearewidelyvaried,andsomeareanticipatedtocorrodethepipingmaterials, or adversely affect HFC
refrigerant,lubricatingoil,etc.Exercisecarewhenusinganoxidationpreventive.
10.4.7. ServicingTips
Thedriermustalsobereplacedwheneverreplacingtherefrigerantcycleparts. Replacing the refrigerant cycle parts first
beforereplacingthedrier.Thedrierissuppliedinavacuumpack.Performbrazing immediately after opening the vacuum
pack,andthenstartthevacuumwithintwohours.Inaddition,thedrieralso needs to be replaced when the refrigerant has
leakedcompletely.(Applicablefordriermodelsonly)
62
11 Installation Instructions
Required tools for Installation Works
1. Philips screw driver5. Spanner9. Gas leak detector13. Multimeter
Read the following “SAFET Y PRECAUTIONS” carefully before installation.
•
Electrical work must be installed by a licensed electrician. Be sure to use the correctratingofthepowerplugandmaincircuit
for the model to be installed.
•
The caution items stated here must be followed because these important contentsarerelatedtosafety.Themeaningofeach
indication used is as below. Incorrect installation due to ignoring of theinstructionwillcauseharmordamage,andthe
seriousness is classified by the followin g indications.
This indication shows the possibility of causingdeathorseriousinjury.
This indication shows the possibilityofcausinginjuryordamagetopropertiesonly.
The items to be followed are classified by thesymbols:
Symbol with backgroundwhitedenotesitemthatisPROHIBITEDfromdoing.
•
Carry out test running to confirmthatnoabnormalityoccursaftertheinstallation.Then,explaintousertheoperation,careand
maintenance as stated in instructions.Pleaseremindthecustomertokeeptheoperatinginstructionsforfuturereference.
6.Usethespecifiedcable(2.5mm2)andconnecttightlyforindoor/outdoorconnection.Connecttightlyandclampthecablesothat no
externalforcewillbeactedontheterminal.Ifconnectionorfixingisnotperfect,itwillcauseheat-uporfireattheconnection.
7.Wireroutingmustbeproperlyarrangedsothatcontrolboardcoverisfixedproperly.Ifcontrolboardcoverisnotfixedperfectly, it will
causeheat-upatconnectionpointofterminal,fireorelectricalshock.
9.Whenconnectingthepiping,donotallowairoranysubstancesotherthanthespecifiedrefrigerant(R410A)to enter the
refrigerationcycle.Otherwise,thismaylowerthecapacity,causeabnormallyhighpressureintherefrigeration cycle, and
possiblyresultinexplosionandinjury.
10.
•
Whenconnectingthepiping,donotuseanyexisting(R22)pipesandflarenuts.Usingsuchsame may cause
abnormallyhighpressureintherefrigerationcycle(piping),andpossiblyresultinexplosionand injury. Use only
R410Amaterials.
•
ThicknessofcopperpipesusedwithR410Amustbemorethan0.8mm.Neverusecopper pipes thinner than 0.8
mm.
11.Donotmodifythelengthofthepowersupplycordoruseoftheextensioncord,and do not share the single outlet with
otherelectricalappliances.Otherwise,itwillcausefireorelectricalshock.
63
1. The equipment must be earthed. It may cause electrical shock if grounding is not perfect.
2. Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at
surrounding of the unit, it may cause fire.
3. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the roomanddamagethe
furniture.
1. Selection of the installation location.
Select a installation location which is rigid and strong enough to support or hold the unit, and selectalocationforeasymaintenance.
2. Power supply connection to the room air conditioner.
Connect the power supply cord of the room air conditioner to the mains using one of the followingmethod.
Power supply point shall be the place where there is ease for access for the power disconnectionincaseofemergency.
In some countries, permanent connection of this room air conditioner to the power supplyisprohibited.
1. Power supply connection to the receptacle using a power plug.
Use an approved 16A power plug with earth pin for 2.0HP (E18CK, E21CK) fortheconnectiontothesocket.
2. Power supply connection to a circuit breaker for the permanent connection.Useanapproved16Acircuitbreakerfor2.0HP(E18CK,
E21CK) for the permanent connection. It must be a double pole switch withaminimum3mmcontactgap.
3. Do not release refrigerant.
Do not release refrigerant during piping work for installation, reinstallationandduringrepairingarefrigerationparts.Takecareofthe
liquid refrigerant, it may cause frostbite.
4. Installation work.
It may need two people to carry out the installation work.
5. Do not install this appliance in a laundry room or other locationwherewatermaydripfromtheceiling,etc.
64
Attached accessories
Applicable piping kit
CZ-4F5, 7, 10AN (E18CK, E21CK)
Indoor/Outdoor Unit InstallationDiagram
SELECT THE BEST LOCATION
INDOOR UNIT
• There should not be any heat sourceorsteamnearthe
unit.
• There should not be any obstaclesblockingtheair
circulation.
1. The inside and outside connecting cable can be connected
without removing the front grille.
2. Connecting cable between indoor unit and outdoor unit
shall be approved polychloroprene sheathed 4 × 2.5 mm
(E18CK, E21CK ) flexible cord, type designation 245 IEC 57
or heavier cord.
• Ensure the color of wires of outdoor unit and the
terminal Nos. are the same to the indoor’s respectively.
• Earth lead wire shall be longer than the other lead wires
as shown in the figure for the electrical safety in caseof
the slipping out of the cord from the anchorage.
• Secure the cable onto the control board withtheholder
(clamper).
2
INSTALLATIONOFAIRPURIFYINGFILTERS
a. Open the frontpanel.
b. Removetheairfilters.
c. Put airpurifyingfilters(left)andtripledeodorizingfilter
d. Pullthelowersectionofthefrontgrilletowards you to
removethefrontgrille.
Whenreinstallingthefrontgrille,first set the vertical
airflowdirectionlouvertothehorizontal position and
thencarryoutabovesteps2-3 in the reverse order.
68
AUTO SWITCH OPERATION
The below operations will be performed by pressing the “AUTO” switch.
1. AUTO OPERATION MODE
The Auto operation will be activated immediately once the Auto Switch is pressed.
2. TEST RUN OPERATION (FOR PUMP DOWN/SERV ICING PURPOSE)
The Test Run operation will be activated if the Auto Switch is pressed continuously for more than 5 sec. to below8sec.A“beep”
sound will occur at the fifth sec., in order to identify the starting of Test Run operation
3. HEATING TRIAL OPERA TION
Press the AUTO Switch continuously for more than 8 sec. to below 11 sec. and release when a“beepbeep”soundisoccurred
at eighth sec. (However, a “beep” sound is occurred at fifth sec.)
4. REMOTE CONTROL RECEIVING SOUND ON/OFF
The ON/OFF of Remote Control receiving sound can be changed over by following steps:
a. Press “AUTO” switch continuously for more than 16 sec. to below 21 sec. A “beep”“beep”“beep”“beep”soundwilloccur
at sixteenth sec.
b. Press the “Check” button once at Remote Control. A “beep” sound willoccur.
c. Press the “AUTO” switch once to select Remote Control receiving soundON/OFF.A“beep”soundindicatesreceivingsound
ON, and a “beep” sound indicate s receiving sound OFF.
11.3. OUTDOOR UNIT
11.3.1. SELECT THE BESTLOCATION(Referto“Selectthebestlocation”section)
11.3.2. INSTALLTHEOUTDOORUNIT
• After selecting thebestlocation,startinstallationaccording
to Indoor/OutdoorUnitInstallationDiagram.
1. Fix the unitonconcreteorrigidframefirmlyandhorizontally
by boltnut.(ø10mm).
Donotreleaserefrigerantduringpipingworkforinstallationandreinstallation.Take care of the liquid refrigerant, it may cause
•
frostbite.
70
11.3.5. CONNECT THE CABLE TO THE OUTDOOR UNIT
1. Remove the control board cover from the unit by loosening the screw.
2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 × 2.5 mm
2
(E18CK,
E21CK) flexible cord, type designation 245 IEC 57 or heavier cord.
3. Secure the cable onto the control board with the holder (clamper).
4. Attach the control board cover back to the original position with the screw.
11.3.6. PIPE INSULATION
1. Please carry out insulation at pipe connection portion as mentioned in Indoor/OutdoorUnitInstallationDiagram.Pleasewrap
the insulated piping end to prevent water from going inside the piping.
2. If drain hose or connecting piping is in the room (where dew may form),pleaseincreasetheinsulationbyusingPOLY-EFOAM
with thickness 6 mm or above.
DISPOSAL OF OUTDOOR UNIT DRAIN WATER
• If a drain elbow is used, the unit should be placed ona
stand which is taller than 3 cm.
• If the unit is used in an area where temperature fallsbelow
0°C for 2 or 3 days in succession, it is recommendednotto
use a drain elbow, for the drain water freezesandthefan
will not rotate.
Istheindoorunitproperlyhooked to the installation plate?
Isthepowersupplyvoltage complied with rated value?
Isthereanyabnormal sound?
Isthecoolingoperation normal?
Isthethermostat operation normal?
Isthe remote control’s LCD operation normal?
Is the air purifying filter installed?
12 Servicing Information
Caution:
• Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F(30-40°C) higher. Pleaseuse
a high temperature soldering iron. In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C).
• Pb free solder will tend to splash when heated too high (about 1100° F/600°C).
12.1. Troubleshooting
1.
Rated Frequency Operation
During troubleshooting and servicing, rated compressor operating frequency must beobtainedinordertocheckthe
specification and technical data. Below are the methods used to obtain rated compressoroperatingspecification.
(a) Cooling
(i) Press the Auto button continuously for 5 seconds or less than 8 seconds, the air conditionerstartsoperationatCoolingratedfrequency.
(“beep” will be heard at the 5th second.)
(ii) Short the service terminal(CN-S)oftheoutdoorprintedcircuitboard.TheoperationofairconditionerisCoolingratedfrequency.
(b)Heating
PresstheAutobuttoncontinuouslyfor8secondsorlessthan11seconds,theair conditioner starts operation at Heating rated
frequency.(“beep”“beep”willbeheardatthe8thsecond.)
72
2.
Troubleshooting Air Conditioner
Refrigeration cycle system
In order to diagnose malfunctions, make sure that there are
no electrical problems before inspecting the refrigeration
cycle. Such problems include insufficient insulation,
problem with the power source, malfunction of a
compressor and a fan.
The normal outlet air temperature and pressure of the
refrigeration cycle depends on various conditions, the
standard values for them are shown in the table to the right.
73
1. Relationship between the condition of the air conditioner and pressure and electric current
Cooling ModeHeating Mode
Condition of the air
conditonerLow PressureHigh PressureElectric current
during operation
Insufficient refrigerant
(gas leakage)
Clogged capillary tube
or Strainer
Short circuit in the
indoor unit
Heat radiation
deficiency of the
outdoor unit
Inefficient compression
Low PressureHigh PressureElectric current
during operation
•
Carry on the measurements of pressure, electric current,andtemperaturefifteenminutesafteranoperationisstarted.
12.2. Breakdown Self DiagnosisFunction
Once abnormality detected during operation,theunitwillimmediatelystopitsoperation(TimerLEDisblinking)andmaximumof
three error codes (abnormality) willbesavedinmemory.Theabnormalityoftheoperationcanbeidentifiedthroughthebelow
breakdown diagnosis method:
•
Press “CHECK” button atremotecontrolcontinuouslyformorethanfivesecondstoturnonthediagnosismode,“H11”willbe
displayed at remote control.
•
By pressing the TMER“
displayed.
•
If error codedisplayedmatchestheerrorcodesavedinunitmemory(abnormalitydetected),four“beep”soundswillbeheard
and PowerLEDwilllighton.Otherwise,one“beep”soundisheard.
If “CHECK”buttonispressagainduringCoolingoperationusingtestrunoperationmodefor30seconds,thediagnosismodewill
turnoff.
Thememorydataoferrorcodeiserasedwhenthepowersupplyiscutoff,orpressthe Auto Switch until “beep” sound heard
followingbypressingthe“RESET”buttonatRemoteControl.
Althoughoperationforcedtostopwhenabnormalitydetected,emergencyoperation is possible for certain errors (refer to Error
CodesTable)byusingRemoteControlorAutoSwitchatindoorunit.However, the Remote Control signal receiving sound is
changedfromone“beep”tofour“beep”sounds.
75
12.3. Remote Control
Remote Control Reset
•
When the batteries are inserted for the first time, or the
batteries are replaced, all the indications will blink and the
remote control might not work.
If this happen , remove the cover of the remote control and
push the reset point once to clear the memory data.
Changing the wireless remote control transmission
•
code
When there are more than one indoorunitsinstalledinthe
same room, it is possible to setdifferentremotecontrol
receiving signal by modifyingthejumpersinsideRemote
Control.
1. The Electronic Controller, a Signal Receiver and an
Indicator (Fig. 3) can be seen by the below steps:
• Open the Intake Grille and remove the screw at the front
of the Front Grille. (Fig. 1).
• Remove the 3 caps and 3 screws at the bottom of the
Front Grille. (Fig. 1)
• Remove the Front Grille by releasing the 3 hooks at the
top of the Front Grille. (Fig. 1)
• Unhook the tabs at the Control Board to remove the
Control Board Cover. (Fig. 2)
Fig.1
2. To remove the Main ElectronicController:
• Release the 2 ParticularPiece.(Fig.3)
• Release the CN-REC/DISPconnectors.(Fig.4)
• Release the CN-THconnector.(Fig.4)
• Release the CN-MAINconnector.(Fig.4)
• Release theCN-STM1connector.(Fig.4)
• ReleasetheCN-STM2connector.(Fig.4)
• ReleasethehooksthatholdtheElectronicController.
(Fig.3)
3. ToremovethePowerElectronicController:
• ReleasetheCN-001connector.(Fig.4)
• ReleasetheCN-002connector.(Fig.4)
Fig.2
Fig.3
77
Fig. 4
12.5. Cross Flow Fan and Indoor Fan Motor Removal Procedures
1. In order to remove the Cross Flow Fan and Indoor Fan
Motor, Control Board need to be taken out by releasing all
the connectors as indicated below.
a. Release the Earth Wire screw. (Fig. 5)
b. Release the Intake Air Sensor. (Fig. 5)
c. Release the Piping Sensor. (Fig. 5)
d. Release the CN-REC connectors. (Fig. 5)
e. Release the CN-STM1. (Fig. 5)
f. Release the CN-STM2. (Fig. 5)
g. Release connectors generator Ionizer. (Fig. 5)
Fig.5
2. Pull out the Drain Hose from outlet to remove the Discharge
Grille. (Fig. 6)
3. Removing the right and left screws. (Fig.7)
4. By pressing down the hook attheleftandpushingupthe
hook at the right, you will beabletoremovetheControl
Board. (Fig. 7)
5. RemovethescrewattheCrossFlowFan.(Fig.8)
Fig.6
Fig.7
78
Fig. 8
6. Remove the Bearing. (Fig. 9)
7. Remove the screws at the left of the Evaporator. (Fig. 9)
8. Push up the Evaporator and pull out the Cross Flow Fan
from shaft. By then, Fan Motor can be taken out. (Fig. 10).
REMINDER - To reinstall the Fan Motor, put it backin
place, adjust the position of the Fan Motor’s leadwire
appropriately as shown in the Fig. 8 before installingthe
Cross Flow Fan.