RXS15LVJU User Manual

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5. Purging air and checking gas leakage

WARNING

•Donotmixanysubstanceotherthanthespeciedrefrigerant(R410A)intotherefrigerationcycle.

•Whenrefrigerantgasleaksoccur,ventilatetheroomassoonandasmuchaspossible.

•R410A,aswellasotherrefrigerants,shouldalwaysberecoveredandneverbereleaseddirectlyintotheenvironment.

•

UseavacuumpumpforR410Aexclusively.Usingthesamevacuumpumpfordifferentrefrigerantsmaydamagethevacuum

pumportheunit.

•Whenpipingworkiscompleted,itisnecessarytopurgetheairandcheckfor

gasleakage.

•Ifusingadditionalrefrigerant,performairpurgingfromtherefrigerantpipes

andindoorunitusingavacuumpump,thenchargeadditionalrefrigerant.

•Useahexagonalwrench(3/16inch(4mm))tooperatethestopvalverod.

•Allrefrigerantpipejointsshouldbetightenedwithatorquewrenchatthe

speciedtighteningtorque.

1) Connectprojectionsideofcharginghose(whichcomesfromgaugemanifold)togasstopvalve’sserviceport.

2) Fullyopengaugemanifold’slow-pressurevalve(Lo)andcompletelycloseitshigh-pressurevalve(Hi).

(High-pressurevalvesubsequentlyrequiresnooperation.)

3) Dovacuumpumpingandmakesurethatthecompoundpressuregaugereads–29.9inHg(–0.1MPa).*1

4) Closegaugemanifold’slow-pressurevalve(Lo)andstopvacuumpump.

(Keepthisstateforafewminutestomakesurethatthecompoundpressuregaugepointerdoesnotswingback.)*2

5) Removecapsfromliquidstopvalveandgasstopvalve.

6) Tu r ntheliquidstopvalve’srod90degreescounterclockwisewithahexagonalwrenchtoopenvalve.

Closeitafter5seconds,andcheckforgasleakage.

Usingsoapywater,checkforgasleakagefromindoorunit’sareandoutdoorunit’sareandvalverods.

Afterthecheckiscomplete,wipeallsoapywateroff.

7) Disconnectcharginghosefromgasstopvalve’sserviceport,thenfullyopenliquidandgasstopvalves.

(Donotattempttoturnvalverodbeyonditsstop.)

8) Tightenvalvecapsandserviceportcapsfortheliquidandgasstopvalveswithatorquewrenchatthespeciedtorques.

*1.Pipelengthvs.vacuumpumpruntime

Pipelength Upto49.2ft(15m) Morethan49.2ft(15m)

Runtime Notlessthan10min. Notlessthan15min

*2.Ifthecompoundpressuregaugepointerswingsback,refrigerantmayhavewatercontentoraloosepipejointmayexists.Check

allpipejointsandretightennutsasneeded,thenrepeatsteps2)through4).

Gauge

manifold

Compound

pressure gauge

Pressure meter

Low-pressure

valve

High-pressure

valve

Charging

hoses

Vacuum pump

Valve caps

Service port

Liquid

stop

valve

Gas

stop

valve

01_EN_3P300674-1B.indd 7 8/28/2012 5:50:59 PM

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User Manual - Page 8