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Installation Manual - Page 6

For MXZ-6E120VAD.

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En-5
Fig. 1 Fig.2
Fig.3 Fig.4
Fig.5 Fig.6
3-1. FLARING WORK
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
ø6.35(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
ø9.52(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
ø15.88(5/8”) 29 73.5to78.4 750to800
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
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.Donotapplyrefrigeration
oilonscrewthreads.Excessivetighteningtorquewillresultindamage
onthescrew.
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.
Copper
pipe
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sectionanddoaring
workagain.
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.
4-1. PURGING PROCEDURES AND LEAK TEST
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).
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
Stopvalve
forGAS
Gaugemani-
foldvalve(for
R410A)
Compoundpressure
gauge(forR410A)
–0.101MPa
(–760mmHg)
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us-
ingthecontrolvalve
Whenattachingthecontrolvalve
totheserviceport,valvecoremay
deformorloosenifexcesspres-
sure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A orturnthebodywhenvalve
coreisinopenposition.
4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN
Stopvalvecap
(Torque24.4to
30.4N•m,250to
310kgf•cm)
Serviceportcap
(Torque10to12N•m,
100to120kgf•cm)
Serviceportcap
(Torque10to12N•m,
100to120kgf•cm)
Stopvalvecap
(Torque21.5to
27.5N•m,220
to280kgf•cm)
3. FLARING WORK AND PIPE CONNECTION
BH79A274H01_en.indd 5 2016/03/23 10:42:18
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