Mitsubishi Electronics Air-Conditioners Air Conditioner User Manual


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En-6
1)Removethepanel.
2)OpenthecoveroftheindoorcontrolP.C.board.
3)JointheconnectingcabletoCN105and/orCN104ontheindoorcontrolP.C.board.
4)Routetheconnectingcablethroughthispointinthegure.
5)Attachthecableclampprovidedwithinterface/connectorcabletothethickpartofthe
connectingcablewithascrew4×16asshowninthegure.
6)ClosethecoveroftheindoorcontrolP.C.board.Becarefulnottocatchthethinpart
oftheconnectingcableinthecover.Reinstallthepanel.
5)
4)
3)CN105
WARNING
Fix the connecting cable at the prescribed position securely.
Incorrect installation may cause electric shock, re, and/ or malfunction.
3. OUTDOOR UNIT INSTALLATION
3-2. 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)
•Puttheendofthecopperpipetodownwarddirectionasyouremoveburrsin
ordertoavoidtoletburrsdropinthepiping.
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youuse.
5)Check
•ComparethearedworkwithFig.6.
•Ifareisnotedtobedefective,cutoffthearedsectionanddoaringworkagain.
3-3. PIPE CONNECTION
• Fastenarenutwithatorquewrenchasspeciedinthetable.
• Whenfastenedtootight,arenutmaybreakafteralongperiodandcauserefrigerantleakage.
• Besuretowrapinsulationaroundthepiping.Directcontactwiththebarepipingmayresultinburnsor
frostbite.
Indoor unit connection
Connectbothliquidandgaspipingstoindoorunit.
• Applyathincoatofrefrigerationoil(J)onthearedendsofthepipes.Donotapplyrefrigerationoilon
screwthreads.Excessivetighteningtorquewillresultindamageonthescrew.
• Forconnection,rstalignthecenter,thentightentherst3to4turnsofarenut.
• Usetighteningtorquetableaboveasaguidelineforindoorunitsideunionjointsection,andtightenusing
twowrenches.Excessivetighteningdamagesthearesection.
Outdoor unit connection
Connectpipestostopvalvepipejointoftheoutdoorunitinthesamemannerappliedforindoorunit.
• Fortightening,useatorquewrenchorspannerandusethesametighteningtorqueappliedforindoorunit.
3-4. 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(G),applytapingstartingfromtheentryofoutdoorunit.
•Stoptheendofpipingtape(G)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.
Pipediameter
(mm)
Nut
(mm)
A(mm) Tighteningtorque
Clutchtype
tool
forR410A
Clutchtype
tool
forR22
Wingnut
typetool
forR22
N•m kgf•cm
ø6.35(1/4”) 17
0to0.5 1.0to1.5
1.5to2.0
13.7to17.7 140to180
ø9.52(3/8”) 22 34.3to41.2 350to420
ø12.7(1/2”) 26
2.0to2.5
49.0to56.4 500to575
- - - -
Copper
pipe
Good
TiltedUnevenBurred
Nogood
Fig.1 Fig.2
Burr
Copperpipe
Sparereamer
Pipecutter
Clutchtype
Flaringtool
Fig.4
Fig.3
Smoothall
around
Evenlength
allaround
Insideisshining
withoutany
scratches.
Flarenut
Die
Fig.5
Fig.6
Copper
pipe
Wingnuttype
WARNING
When installing the unit, securely
connect the refrigerant pipes before
starting the compressor.
3-1. CONNECTING WIRES FOR OUTDOOR UNIT
1)Opentheservicepanel.
2)Loosenterminalscrew,andconnectindoor/outdoorunitconnectingwire(A)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ex-
ternalforceisconveyedtotheconnectingsectionoftheterminalblock.
3)Firmlytightentheterminalscrewstopreventthemfromloosening.Aftertightening,
pullthewireslightlytoconrmthattheydonotmove.
4)Connectpowersupplycord(K).
5)Fixindoor/outdoorunitconnectingwire(A)andpowersupplycord(K)withthecord
clamp.
6)Closetheservicepanelsecurely.
• Makeearthwirealittlelongerthanothers.(Morethan100mm)
• Forfutureservicing,giveextralengthtotheconnectingwires.
• Besuretoattacheachscrewtoitscorrespondentterminalwhensecuringthecordand/or
thewiretotheterminalblock.
Terminalblock
Cordclamp
Terminalblock
Powersupply
cord(K)
15mm
35mm
Leadwire
<KJ25,35>
<KJ50,60>
Indoor/outdoor
unitconnecting
wire(A)
Power supply
cord (K)
Whenmountingthe
interfaceandthe
connectorcable,use
thisscrewtoxthe
connectingcable.
3)CN104
JG79A867H02_en.indd 6 2014/06/25 13:39:04
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