IFM LX0020 User manual

Operating instructions
Binary level sensor
LX0020
UK
80229921 / 00 08 / 2015

2
1 Safety instructions
• In order to guarantee the correct condition of the unit for the operating time it
is necessary to use the unit only for media to which the wetted materials are
sufficientlyresistant(→Technicaldata).
• Theresponsibilitywhethertheunitissuitablefortherespectiveapplicationlies
withtheoperator.Themanufacturerassumesnoliabilityforconsequencesof
misusebytheoperator.Improperinstallationanduseoftheunitresultinaloss
ofthewarrantyclaims.
• TheunitcomplieswiththestandardEN61000-6-4.Indomesticareas
(EN61000-6-3)theunitmustbeinstalledinclosedmetaltanks/pipes.
2 Functions and features
Theunitmonitorsthelevelofliquid,aqueousmediaintanksandpipes.Itisin
particularintendedforthedetectionofcoolants(e.g.R134a,R22orR717)and
oils.Itcanbeusedforpointleveldetectionandrun-dryprotection.
• Theunitcanbeoperatedatmediumtemperaturesof-20...85°C.
• Tankpressure:-1…40bar.
3 Installation
ThedeviceiseitherinstalledandsealeddirectlyviatheG1/2internalthreadorvia
asuitablemountingadapter.
For direct installation via the internal thread:
► Usesuitablesealingmaterialorasuitable(forrefrigerationsystems)seal-
ingmethod. Thesensorhousingmustbeinelectricalcontactwiththemetal
processconnection.
For installation via mounting adapter:
A correct fit and function of the unit and ingress resistance of the
connectionareonlyensuredusingifmadapters.
Availableaccessories:www.ifm.com→Datasheetsearch→Accessories
► Observetheinstallationinstructionsoftheadapterused.
► Weldorinstalltheadapterintothetank/pipe.
► Slightlygreasethethreadofthesensorusingalubricatingpastewhichis
suitableandapprovedfortheapplication.

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UK
► Screwthesensorintotheadapterandtighten.
Max.tighteningtorque:20…25Nm.
► Afterinstallationcheckthetank/pipeforingressresistance.
4 Electrical connection
Theunitmustbeconnectedbyaqualifiedelectrician.
Thenationalandinternationalregulationsfortheinstallationofelectrical
equipmentmustbeadheredto.VoltagesupplyaccordingtoEN50178,
SELV,PELV.
► Disconnectpowerandconnectunitasfollows:
Corecolours
43
2 1
L
L+
4:
3
2:
4
2
1
BN
WH
BK
BU
BK Black
BN Brown
BU Blue
WH White
5 Operation
Whenthesupplyvoltagehasbeenapplied,theunitisintheoperatingmode.It
carriesoutitsevaluationfunctionsandswitchestheoutputs.
OperationindicationbyLEDandoutputsignals:
LED OUT1 OUT2
Unitreadyforoperation,nomediumdetected Green OFF ON
Unitreadyforoperation,mediumdetected Yellow ON OFF
no operating voltage OFF OFF OFF
Error/failure - OFF OFF
6 Maintenance, repair, disposal
► Fromtimetotimechecktheprobecapfordepositsanddamage.Cleantheunit
ifbadlysoiled.Incaseofdamagereplacetheunit.
► Afterremovalandbeforereinstallationoftheunitcarefullycleantheprobeneck
andtheinstallationslot-especiallythesealingcone-withappropriatemethods
toensurethatitisresistanttoingressandwithoutdeadspace.
► Itisnotpossibletorepairtheunit.