Mitsubishi MUFZ-KJ09NAHZ-U1 User Manual

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5-1. PURGING PROCEDURES AND LEAK TEST

1)

Removeserviceportcapsfromstopvalvesonbothsidesofrefrigerantlines.

(Thestopvalvesarefullyclosedwhenshipped.)Leaveclosed.

2)Connectgaugemanifoldtoportsofstopvalves.

5-4.EXPLANATIONTOTHEUSER

• UsingtheOPERATINGINSTRUCTIONS,explaintotheuserhowtousethe

airconditioner(theremotecontroller,removingtheairlters,placingorremov-

ingtheremotecontrollerfromtheremotecontrollerholder,cleaningmethods,

precautionsforoperation,etc.)

• RecommendthattheuserreadtheOPERATINGINSTRUCTIONScarefully.

Stopvalve

forGAS

Stopvalvecap

(Torque15to

22ft-lb,19.6to

29.4N•m,200

to300kgf▪cm)

Vacuumpump(orthe

vacuumpumpwiththe

functiontopreventthe

backow)

Gaugemanifold

valve(forR410A)

Compoundpressure

gauge(forR410A)

–14.7psi[Gauge]

(–0.101Mpa)

Handle

Low

HandleHigh

Adapterfor

preventingthe

backow

Chargehose

(forR410A)

*Close

*Open

Hexagonal

wrench

Precautionswhenusingthe

controlvalve

Whenattachingthecontrolvalve

totheserviceport,valvecoremay

deformorloosenifexcesspressure

isapplied.Thismaycausegasleak.

Serviceport

Chargehose

Body

Open

Controlvalve

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.

Serviceportcap

(Torque10to13

ft-Ib,13.7to17.7

N•m,140to180

kgf•cm)

*4to5turns

3)Evacuate the system to 4000 microns from both service valves. System

manifoldgaugesmustnotbeusedtomeasurevacuum.Amicrongaugemust

beusedatalltimes.BreakthevacuumwithNitrogen(N2)intothedischarge

servicevalveto0PSIG.

4)Evacuatethesystemto1500microns.BreakthevacuumwithNitrogen(N2)

intothedischargeservicevalveto0PSIG.

5)Evacuatethesystemto500microns.

6)Closegaugemanifoldvalves,stopthepump,andconducta30minuterise

test.

7)Systemshouldhold500micronsforaminimumof1hour.

8)Fullyopenallstopvalvesonbothsidesofgaspipeandliquidpipe.Operating

withoutfullyopeninglowerstheperformanceandthiscausestrouble.

9)Referto 1-3 and charge the prescribed amount of additional refrigerant if

needed.Besuretochargeslowlywithliquidrefrigerant.Otherwisecomposi-

tionoftherefrigerantinthesystemmaybechangedandaffectperformance

oftheairconditioner.

10)Removegaugemanifoldsandreplaceserviceportcapsandtighten.

11)Leaktest

Stopvalve

forLIQUID

5. PURGING PROCEDURES, LEAK TEST, AND TEST RUN

Pressuregauge

(forR410A)

Caution:

• Aftertestrunorremotesignalreceptioncheck,turnofftheunitwiththe

E.O.SWortheremotecontrollerbeforeturningoffthepowersupply.Ifthis

procedureisnotperformed,theunitwillautomaticallybeginoperationwhen

powersupplyisresumed.

To the user

• Afterinstallingtheunit,explaintotheuseraboutautorestartfunction.

• Ifautorestartfunctionisunnecessary,itcanbedeactivated.Consultthe

servicerepresentativetodeactivatethefunction.Refertotheservicemanual

fordetails.

5-2. TEST RUN

1)Insertpowersupplyplugintothepoweroutletand/or

turnonthebreaker.

2)PresstheE.O.SWonceforCOOL,andtwiceforHEAT

operation.Testrunwillbeperformedfor30minutes.If

theleftlampoftheoperationindicatorblinksevery0.5

seconds,inspecttheindoor/outdoorunitconnecting

wire(A)formis-wiring.Afterthetestrun,emergency

mode(settemperature75°F[24°C])willstart.

3)Tostopoperation,presstheE.O.SWseveraltimes

untilallLEDlampsturnoff.Refertooperatinginstruc-

tionsfordetails.

Checking the remote (infrared) signal reception

PresstheOFF/ONbuttonontheremotecontroller(12)andlistenforan

audibleindicatorfromtheindoorunit.PresstheOFF/ONbuttonagaintoturn

theairconditioneroff.

• Oncethecompressor stops,therestartpreventivedevice operatessothe

compressorwillnotoperatefor3minutestoprotecttheairconditioner.

5-3. AUTO RESTART FUNCTION

Thisproductisequippedwithanautorestartfunction.Whenthepowersupply

iscutoffduringoperation,suchasduringblackouts,thefunctionautomatically

startsoperationintheprevioussettingoncethepowersupplyisresumed.

(Refertotheoperatinginstructionsfordetails.)

Emergencyoperation

switch(E.O.SW)

6. 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psi[Gauge]

(0Mpa).

4)StarttheemergencyCOOLoperation.

 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(

0.1to0psi[Gauge](0.05to0Mpa))

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.

WARNING

When pumping down the refrigerant, stop the compressor before dis-

connecting the refrigerant pipes. The compressor may burst if air etc.

get into it.

JG79Y071H02_en.indd 10 2016/01/21 13:20:07

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Mitsubishi MUFZ-KJ09NAHZ-U1 Cooling And Heating Outdoor Unit

User Manual - Page 11