Panasonic S-12MT2U6 - Default Chapter; Check of Density Limit

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• Donotleakrefrigerantwhilepipingworkforan
installationorre-installation,andwhilerepairing
refrigerationparts.
Handleliquidrefrigerantcarefullyasitmaycause
frostbite.
When Servicing
• Tu r nthepowerOFFatthemainpowerbox(mains)
beforeopeningtheunittocheckorrepairelectrical
partsandwiring.
• Keepyourfingersandclothingawayfromanymoving
parts.
• Cleanupthesiteafteryoufinish,rememberingto
checkthatnometalscrapsorbitsofwiringhavebeen
leftinsidetheunit.
WARNING

• Thisproductmustnotbemodifiedor
disassembledunderanycircumstances.
Modifiedordisassembledunitmaycausefire,
electricshockorinjury.
• Donotcleaninsidetheindoorandoutdoor
unitsbyusers.Engageauthorizeddealeror
specialistforcleaning.
• Incaseofmalfunctionofthisappliance,do
notrepairbyyourself.Contacttothesales
dealerorservicedealerforarepair.
CAUTION

• Donottouchtheairinletorthesharp
aluminumfinsoftheoutdoorunit.Yo u 
maygetinjured.
• Ventilateanyenclosedareaswheninstallingor
testingtherefrigerationsystem.Leaked
refrigerantgas,oncontactwithfireorheat,can
producedangerouslytoxicgas.
• Conrmafterinstallationthatnorefrigerantgas
isleaking.Ifthegascomesincontactwitha
burningstove,gaswaterheater,electricroom
heaterorotherheatsource,itcancausethe
generationoftoxicgas.
Others
CAUTION

• Donotsitorstepontheunit,youmay
falldownaccidentally.
• Donottouchtheairinletorthesharp
aluminumfinsoftheoutdoorunit.
Yo u maygetinjured.
• DonotstickanyobjectintotheFAN
CASE.
Yo u maybeinjuredandtheunitmay
bedamaged.
Check of Density Limit
The room in which the air conditioner is to be
installed requires a design that in the event of
refrigerant gas leaking out, its density will not exceed
a set limit.
Therefrigerant(R410A),whichisusedintheair
conditioner,issafe,withoutthetoxicityorcombustibilityof
ammonia,andisnotrestrictedbylawsimposedtoprotect
theozonelayer.However,sinceitcontainsmorethanair,
itposestheriskofsuffocationifitsdensityshouldrise
excessively.Suffocationfromleakageofrefrigerantis
almostnon-existent.Withtherecentincreaseinthe
numberofhighdensitybuildings,however,theinstallation
ofmultiairconditionersystemsisontheincrease
becauseoftheneedforeffectiveuseoffloorspace,
individualcontrol,energyconservationby curtailingheat
andcarryingpower,etc.
Mostimportantly,themultiairconditionersystemisable
toreplenishalargeamountofrefrigerantcomparedto
conventionalindividualairconditioners.
Ifasingleunitofthemultiairconditionersystemistobe
installedinasmallroom,selectasuitablemodeland
installationproceduresothatiftherefrigerant
accidentallyleaksout,itsdensitydoesnotreachthelimit
(andintheeventofanemergency,measurescanbe
madebeforeinjurycanoccur).
ASHRAEandtheInternationalMechanicalCodeofthe
ICCaswellasCSAprovideguidanceanddefine
safeguardsrelatedtotheuseofrefrigerants,allofwhich
defineaRefrigerantConcentrationLevel(RCL)of
25pounds(11.3kg)per1,000cubicfeet(28.3m
3
)for
R410Arefrigerant.
Foradditionalguidanceandprecautionsrelatedto
refrigerantsafety,pleaserefertothefollowingdocuments:
InternationalMechanicalCode2012(IMC-2012)
(ormorerecentlyrevised)
ASHRAE15
ASHRAE34
00_271725_Eng.indb 3 2015-6-30 13:26:08
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