Electrolux E23CS75DSS0 - Testing for Refrigerant Leaks; Checking for Internal (Hot Tube) Leaks

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Section E - Refrigeration System
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amountofrefrigerantloss).
4.  Lowsuctionpressure(vacuum).
5.  Lowwattage.
Thecondenserwillbe“warmtocool”,depending
ontheamountofrefrigerantlost.
Whenrefrigerantisadded,thefrostpatternwill
improve,thesuctionanddischargepressures
willrise,thecondenserwillbecomehotandthe
wattagewillincrease.
Inthecaseofalowsiderefrigerantleakresulting
incompletelossofrefrigerant,thecompressor
willrunbutwillnotrefrigerate.Suctionpressure
willdropbelowatmosphericpressureandairand
moisturewillbedrawnintothesystemsaturating
thelterdrier.
Ifthereisreasontobelievethesystemhas
operatedforaconsiderablelengthoftimewithno
refrigerantandtheleakoccurredinthelowsideof
thesystem,excessiveamountsofmoisturemay
haveenteredthesystem.Insuchcasesthetwo
stageserviceDryerFilterpartnumber5303918288
andvacuumprocedurelistedunderRefrigerant
LeaksonpageE15needtobefollowedtoprevent
repetitiveservice.
Ifaslightunderchargeofrefrigerantisindicated
andnoleakcanbefoundafterathoroughleak
test,thechargecanbecorrectedwithoutchanging
thecompressor.
Ifahighsideleakislocatedandsomerefrigerant
remainsinthesystemitisnotnecessarytochange
thecompressor.
Testing for Refrigerant Leaks
Ifthesystemisdiagnosedasshortofrefrigerant
andthesystemhasnotbeenrecentlyopened,
thereisprobablyaleakinthesystem.Adding
refrigerantwithoutrstlocatingandrepairing
theleakorreplacingthecomponentwillnot
permanentlycorrectthedifculty.Theleakmust
befound.Sufcientrefrigerantmayhaveescaped
tomakeitimpossibletoleaktesteffectively.
Insuchcases,adda¼”linepiercingvalveto
thecompressorprocesstube.Addsufcient
refrigerantvaportoincreasethepressureto40to
50lb.persq.in.Checkthelowsideforleaks.Run
thecompressor2or3minutesandcheckthehigh
sideforleaks.RecoverrefrigerantusinganEPA
approvedrecoverysystem.
Checking for Internal (Hot
Tube) Leaks
Beforecheckingforinternalleaks,checkall
accessiblesystemcomponentsandjointsforleaks.
Ifaninternalhottubeleakissuspected,itmustbe
conrmed.Usethefollowingprocedure:
1.  RecoverrefrigerantbyusingEPAapproved
recoverysystem.
2.  Aftersystem refrigerantiscompletely
recovered,disconnectdrierfromhottube.
Pinchoffandsolderendofhottubeclosed.
3.  Cutlinefromcondensertohottubeand
soldera¼”charginghosettingtoopenend
ofhottubeorputcompressionttingontube.
4.Connectpressuregaugeandaccessvalve
tohottubeandpressurizeto250psigusing
drynitrogenorcarbondioxide.
NOTE
Thelinepiercingvalve(clamp-ontype)shouldbe
usedfortestpurposesonly.Itmustberemoved
fromsystemafterithasserveditspurpose.
WARNING
Never pressurize with oxygen. never open a
high pressure tank unless it is equipped with
a pressure regulator. never put high pressure
on dome of compressor – it could explode.
make sure gauge, HOSES, AND ALL fittings
are in good condition and do not leak.
5. Leavepressureonhottubefor24hours.Any
dropinpressureisindicationofleak.
If dry nitrogen or carbon dioxide is not
available, follow steps 1 through 3 above, then
steps 4 and 5 below:
4.  Connectgaugestocharginghosettings.
Pullvacuumonhottube.
5.  Leavevacuumoneachsideofsystemfor24
hours.Anylossofvacuumindicatesleak.