T20-1B2A-9DR MAGNETROL | Alldatasheet
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Installation and OperatingMan ual Liquid Level Swi tches Top Mounting T20 and T21
44-604 Top Mounting LiquidLevelSwitches Read thisMan ualBefore Installing T hism anualprovidesinformation on the T opMounting LiquidLevelSwitch.Itisimportantthatallinstructions are read carefully and followed in sequence.D etailed instructions areincluded in the Installationsectionof thisma nual. Con ventions Used in thisMa nual Certainconventions areused in thism anualto convey specifictypesofinformation.Generaltechnicalmaterial, support data,and safetyinformation are presented in narrative form. The followingstylesareused for notes, cautions,and warnings. NOT ES Notescontain information thataugm entsor clarifies an operating step. No tesdo not normallycontain actions.They follow the proceduralsteps to wh ich they refer. C autions Cautionsalertthe techniciantospecialconditionsthat could injurepersonnel,dam age equipment,or reduce a comp onent’sme chanicalintegrity.Cautions arealso usedto alertthetechnicianto unsafe practicesor the need for specialprotective equipmen t or specific m aterials.In thismanual,a caution box indicatesa potentiallyhazardous situation wh ich,ifnot avoided, m ayresultinminorormo derate injury. WAR NINGS W arnings identifypotentiallydangerous situations or serioushazards.In thism anual,a w arningindicatesan imminently hazardoussituationw hich,ifnotavoided, could resultin seriousinjuryordeath. SafetyMe ssages Follow allstandardindustryproceduresforservicingelec - trical equipme nt when working w ithor around high voltage.Alwaysshutoffthepowersupply beforetouching any comp onents. WARN ING! Explosion hazard. D o not connect or dis - connectequipmentunlesspower hasbeenswitched offor the area isknown tobe non-hazardous. Low Voltage Directive Foruse in CategoryII installations.Ifequipmentisused in a man ner not specified by m anufacturer,protection provided by equipmentmay be impaired. NoticeofT radem ark,Co pyright,and Limitations M agnetrol& Ma gnetrollogotypeareregistered trade - marksofM agnetrolInternational. Copy right© 2010 M agnetrolInternational, Incorporated.A llrightsreserved. Performa nce specificationsareeffective w ith dateof issue and aresubjecttochangew ithoutnotice. Magn etrolreservesthe rightto m akechangesto the productdescribedinthism anualatany time w ithout notice.Magn etrolm akesno w arranty w ithrespecttothe accuracy ofthe inform ation inthism anual. Wa rranty AllMagn etrolm echanicalleveland flow controlsarew ar - ranted freeofdefectsinm aterialsorw orkmanshipforfive fullyearsfrom the date oforiginalfactoryshipment. Ifreturned withinthe warrantyperiod; and,upon factory inspection of the control,the cause of the claim is determined to be covered under the warranty; then, Mag netrolwillrepairor replace thecontrolatno costto thepurchaser(orowner) otherthan transportation. Magn etrol shallnot be liablefor misapplication,labor claims,directorconsequentialdamage orexpensearising from the installation or use of equipment.T here areno otherw arrantiesexpressed orimplied,exceptspecialw rit - ten w arrantiescoveringsom e Magn etrolproducts. Qu alityAssurance Th e qualityassurance system inplace atM agnetrolguar - anteesthe highestlevelofqualitythroughoutthecompa - ny.M agnetrol iscom m itted to providing fullcustomer satisfaction bothin qualityproductsand quality service. Magn etrol’s qualityassurance system isregistered to ISO 9001 affirming its comm itment to know n international quality standards providing the strongestassurance ofproduct/service qualityavailable.
1.0 Introduction
2.0 Installation
4.0 PreventiveMaintenance
4.1.2 Inspectswitch m echanisms,terminals,
5.0 Reference Information
5.4.2.2 Mou nting flangesand
344-604 Top Mounting LiquidLevelSwitches
4 44-604 Top Mounting LiquidLevelSwitches Pivot Return Spring Process Liquid Rising Level Figure 1 Process Liquid Falling Level Figure 2 T20 and T 21 levelswitchesarefloatoperated units designed fortop mo unting to a tank orvesselby me ansof threaded orflanged pipe connections.T 20 standard units are equipped with a singleswitch m echanism forhighor low levelalarmorcontrolapplications.T21 tandem units are equipped with two switch m echanisms,each operated by a separate float,forapplications requiring w idelyspaced separatehigh and low levelsw itch actuation.
1.1 PrincipleofO peration
The simpleand foolproofoperation ofthe top mo unted floatswitchesisillustrated in figures1 and 2. A perman entm agnet isattached toa pivoted switch actuatorand adjustme ntscrew .A sthe float rises following the liquid level,itraisesthe attraction sleeve into thefieldofthe magn et,which then snapsagainstthe non-magnetic enclosingtube ,actuating theswitch. The enclosingtube providesa static pressureboundary between theswitch m echanism and the process.O n a falling level,an inconelspring retractsthemagn et, deactivatingthe switch. Thissection providesdetailedproceduresforproperly installingtop m ounted levelswitches. Cau tion: If equipm ent is used in a ma nner not specifiedby the man ufacturer,protection provided by the equipm ent m ay be impaired.
2.1 Unpacking
Un packtheinstrum entcarefully.Inspectallunitsfor damage.R eportany concealed damage to carrierw ithin 24 hours.Check the contentsofthe packing slipagainst purchaseorder.Check and record the m odelnum ber againstserialnum berforfuture reference w hen ordering parts. Mode lN um ber SerialN um ber
544-604 Top Mounting LiquidLevelSwitches
2.2 Criticalalarm function
Itisrecomm ended thatforcriticalalarm functions,an additionallevelswitch be installed asa high–highor low–low levelalarmform aximu m protection.
2.3 Mounting
Cau tion: Ope ration ofallbuoyancy typeleveldevicesshouldbe done insuch a wa y as to minimize theactionofdynam icforces on thefloatordisplacersensing element.G ood practicefor reducing thelikelihood ofdama ge tothecontrolistoequal - ize pressureacross the device very slowly. En sure thatno tubes,rods,orotherobstaclesinthetank orvesselwhich couldinterferew ith the operationof float(s). Cau tion: Thisinstrume ntis intended foruse inInstallationCategoryII, Pol lution Degree 2. Ad justtheprocessconnection asrequired to bringcontrol toa verticalposition.Ma gnetrolcontrolsm ustbe m ounted withinthreedegreesofverticalin alldirections.A three degreeslantisnoticeableby eye,butinstallationshouldbe checked with a spiritlevelon top and/orsidesoffloatstem orenclosingtube. N OTE: Do notinsulatesw itchm echanism housing. On controlsequipped with pneum atic switch assemblies, consultbulletinon m echanism furnished forair(or gas) pipinginstructions. SwitchSeries Description Bulletin Letter No. B,C, D Dry ContactSwitch 42-683 F HermeticallySealed Snap Switch HS, H1 HermeticallySealed Snap Switch 42-694 J BleedType Pneumatic Switch 42-685 K Non-BleedType Pneumatic Switch 42-686 R, 8,9 High TemperatureSwitch 42-799
6 44-604 Top Mounting LiquidLevelSwitches Internal Circuit (Right) Switch1 Load Load Close on high level Common Close on low level Line Internal Circuit (Left) Switch Load Load Close on high level Common Close on low level Line Set Screw ScrewScrew Figure3 Ho using SetScrews Figure4 Term inalCo nnections DP DT Switch M echanism Series B ,C,and D
2.4 Wiring
C aution: All Top Mo unting unitsare shipped from the factory with the enclosing tube tightened and the switch housing set screw locked to the enclosing tube.Failureto loosen the set screw prior to repositioning the supply and output connections m ay cause the enclosing tube to loosen, resulting in possibleleakage oftheprocess liquid orvapor. T op m ounting controlsare shipped w iththe conduitentry oftheswitch housingplaced 180° opposite thetank con - nectionstosimplify installation in mo stcases.Ifthe loca - tion oftheconduitentryon the levelswitch isappropriate totheinstallation,proceedto Step 4 tobegin wiringthe unit.Ifanotherconfiguration isdesired,the switch housing can be easily rotated by firstfollowing Steps1,2 ,and 3 . NOT E: A sw itch orcircuitbreakershallbe installed inclose proximity to equipm ent and within easy reach of operator.It shall be m arked as thedisconnecting device for theequipme nt. 1. Loosen setscrew(s) atbaseofsw itch housing.R eferto Figure 3. 2. Switch housing m aybe rotated 360° toallow correctposi - tioning ofconduitoutlet. 3. Tighten setscrew(s) atbase ofswitch housing. 4. U nscrew and rem oveswitch housing cover.The threads havebeen lubricated to facilitate rem oval. NOT E: For supply connections use w irewith a minimum rating of 75° C , as required by process conditions.Use a minimum of 14 AWG w ire for pow er and ground field wires.O n high temperatureapplications (above 25 0° F [121°C ]atm ounting flange or bushing),high tem perature wire should be used between controland firstjunction box located ina coolerarea. O n non-hazardous applications,flexibleconduitma y be used between thecontroland thefirstjunction box. 5. The switch terminalsare located nexttothe conduitoutlet tofacilitatewiring.Bring supplyw iresthrough conduit outlet.Ro uteextra wirearound enclosing tube underthe baffleplate,and connectthem tothe properterminals. Refertothew iring diagram,Figure4,oryourswitch bulletin forthisinformation.
744-604 Top Mounting LiquidLevelSwitches 6. Dressw iring toensureno interferenceor contactwith theswitchactuationarm,or replaceme nt ofswitch housing cover. N OTE: Ob serve all applicable electrical codes and proper wiring procedures. Preventm oisture seepageinto the enclosure by installing approved seal-drain fittingsin the conduitrun leadinginto theunit. Cau tion: In hazardous areas, do not power the unit until the conduit is sealed and the enclosure cover is screwe d dow n securely. 7. Replace housingcover. 8. Ifcontrolhasbeen furnished w ith an explosion proofor mo isture proofswitch housing,itm ustbe sealed atthe conduitoutletw itha suitablecom pound ornon-harden - ingsealanttoprevententrance ofair. 9. T estswitchaction by varying liquidlevelinthetankor vessel.The upperswitch on Mod elT 21 unitsisactuated by mo veme ntofthe lowerfloat,w hilethe lower switchis actuated by theupperfloat. N OTE: Ifsw itch m echanism fails to function properly,check vertical alignm ent of controlhousing and consultinstallation bulletin on sw itch m echanism furnished. 10. Check coverto basefittobe certain gasketed jointistight. A positivesealisnecessaryto preventinfiltration ofmois - tureladen airorcorrosivegassesintoswitch housing.
8 44-604 Top Mounting LiquidLevelSwitches
3.0 Switch DifferentialAdjustment
The standard differentialofthe singlefloatMo delT20 may be fieldadjusted.Ad justmentmay be necessaryif a widerdifferentialneedsto be setto overcome switch chattercaused by the process. The differential,orthe am ountofleveltravelbetw een switch-on and switch-off,may be adjusted by repositioning thelowerjam nutson the floatstem .T he standard factory settingisfora m inimum am ountofplay(gap) between thetop jam nutsand theattraction sleeveasshow n in Figure 6. NOT E: For assistance in com puting level differential change for a specific control, consult the factory givingthe mo del and serialnumb ers ofthe control. C aution: Max imum differentialadjustmentis0.50 inch. NOT E: To w iden the differential0.50 inch, the lowe r jam nuts m ust be setproportionately low eron thestem (i.e.,inthis examp le 0.50 inch). C aution: Beforeattempting any wo rk on the control,pulldiscon - nect sw itch, or otherw ise assure thatelectricalcircuit(s) through the controlisdeactivated.Close operating m edi - um supply valve on controls equipped with pneuma tic switchm echanism s. 1. Determine what changeindifferentialisnecessary. 2. Make sure powersource isturned off. 3. U nscrew and rem oveswitch housing cover. 4. Disconnectpow ersupplyw iresfrom switch mechanism. Pullwiresoutofconduitconnection opening in housing base.R eferto Figure 5. 5. Perform system shut-dow n proceduresasrequired to relievepressurefrom tank orvesseland drain offliquid head,ifrequired.Allow unitto cool. NOT E: The amo unt ofleveltravelbetween switch-on and switch-off actuation (differential)m ay be field adjusted by repositioning the lowe r jam nuts on the float stem. The standard factory setting is for a m inim um am ount of play (gap)between the top jam nutsand the attraction sleeve,as show n inFigure 6. This setting ma y be increased to a max imum of 0.50" (13 m m ),as show n in Figure 7. 6. Rem oveswitchhousing assembly by loosening the enclos - ingtube nut,w hichislocated imm ediatelybelow housing base.R eferto Figure 5. Float Enclosing tube Refer to Figures 6 and 7 Housing base Enclosing tube nut Conduit connection Switch housing cover Figure5
944-604 Top Mounting LiquidLevelSwitches 7. With switch housing and enclosing tube remo ved,jam nutsand attraction sleeveareaccessible.Me asure position ofupperjam nutsfrom stem end; then loosenand remo ve upperjam nuts,guide w asher,and attraction sleeve. 8. Loosen and adjustlow erjam nutsto desiredposition. Make certain jam nutsare retightened securely. N OTE: Use new enclosing tube gasketinassemb lyofswitchhousing to the m ounting bushing or flange.R efer to Sections5.4.1.1 and 5.4.2.1 forenclosing tube gasketpartnumb ers. 9. T estswitchactuation by varying liquidlevelintankor vessel. Cau tion: Instructions given areforstandardbase mo delunitswhich use a single m agnetsw itch m echanism only.N o differen - tialadjustmentshould be attemptedon tandem floatm od - els in the field.Sw itch actuation levelshave been set at the factory to m eet specific custome r specifications. Variations in actual conditions from design conditions usually requires special controlm odifications. C onsult withthefactoryor localrepresentativeforassistance. For access to bottom jam nuts, mark position, remove top jam nuts, washer, and attracting sleeve. Slight play (gap) must be allowed (.03" [.8 mm] typical) Position of bottom jam nuts (normal factory setting) Replace in same position Drop bottom jam nuts to increase gap setting (see instructions below) 0.50" (13 mm) Maximum gap setting (Applies to models having a single switch mechanism with a single magnet actuator only) Float Figure7 Differential adjustment Figure 6 Normal Factory Setting (minim um differential) CA UTION: Af ter increasing gap setting,be certainto check for properoperationofswitchmechanism by rais - ing and lowering floatassem bly.Magnet must snap cleanly, with additional floatm ovement availableafter m agnetsnaps.
10 44-604 Top Mounting LiquidLevelSwitches
4.0 Preventive Maintenance
Periodic inspectionsarea necessarym eanstokeep your levelcontrolingood working order.T hiscontrolisa safe - tydevice toprotectthe valuableequipme ntitserves. Therefore,a system atic program of“preventivemainte - nance”mu stbe imp lemented w hen thecontrolisplaced into service.Ifthefollow ing sections on “w hatto do” and “what toavoid”are observed,yourcontrolw illprovide reliableprotection ofyourequipme ntform any years.
4.1 Wha ttodo
4.1.1 K eep controlclean
Be sure theswitch housing coverisalwaysin placeon the control.T hiscoverisdesigned to keep dustand dirtfrom interfering withswitchmechanism operation.In addition, itprotectsagainstdamaging mo istureand actsasa safety feature by keeping barew iresand terminalsfrom being exposed.Shouldthe housing coverorany sealsbecome damaged orm isplaced,obtain a replacementimme diately.
4.1.2 Inspectswitch me chanisms ,terminals,and
- Switchesshouldbe inspected forexcessivew earon actuating leverorm isalignme ntofadjustme ntscrew atpointof contactbetween screw and lever.Such w earcan causefalse switch actuating levels.See switch m echanism bulletin supplied withcontrolshouldswitch adjustmen tor replaceme ntbe necessary. 2. DO NO T operate yourcontrolw ith defectiveormal- adjusted switch m echanism s(refertobulletinon switch m echanism sfurnished forserviceinstructions.) 3. Levelcontrolsmay sometimes be exposed to excessiveheat orm oisture.U ndersuch conditions,insulation on electri - calwiring may becom e brittle,eventuallybreaking or pealing away.T he resulting “bare” w irescan cause short circuits. NO TE: C heck w iring carefully and replace at the firstsignof brittle insulation. 4. Vibration m aysome times cause term inalscrewsto w ork loose.Check allterm inalconnections to be certainthat screwsaretight.
11 44-604 Top Mounting LiquidLevelSwitches 5. O n unitsw ithpneumatic switches,air(orgas)linessub - jected tovibration,m ayeventuallycrack orbecome loose atconnections causing leakage.Check linesand connec - tionscarefullyand repairorreplace,ifnecessary. N OTE: As a m atterofgood practice,spareswitches should be kept on hand atalltimes.
4.1.3 Inspectentireunitperiodically
Isolatecontrolfrom vessel.Raiseand lowerliquidlevelto check forsw itchcontactand reset.
4.2 Wha ttoavoid
- Ne verleavesw itch housing coveroffthe controllonger thannecessaryto m akeroutine inspections. 2. Ne verplace a jum perwireacrossterminalsto“cut-out” thecontrol.Ifa “jump er” isnecessaryfortestpurposes,be certain itisrem ovedbeforeplacing controlintoservice. 3. Ne verattem pttomake adjustm entsorreplace switches withoutreading instructionscarefully.Certainadjustments provided forinlevelcontrolsshouldnotbe attemptedin thefield.W hen indoubt,consultthe factoryoryourlocal representative. 4. Ne veruselubricantson pivotsofswitch me chanisms. A sufficientam ountoflubricanthasbeen applied atthe factorytoensure a lifetim e ofservice.Furtheroiling is unnecessaryand w illonlytend to attractdustand dirt which can interfere with m echanism operation.
12 44-604 Top Mounting LiquidLevelSwitches
5.1 Troubleshooting
Usuallythefirstindication ofimproperoperation isfailure ofthecontrolled equipme ntto function,(i.e.:pump w ill notstart(orstop),signallampsfailto light,etc.)Whe n thesesymp toms occur,w hetherattime ofinstallation or during routine servicethereafter,check thefollowing potentialexternalcausesfirst. a.Fusesm aybe blown. b.Resetbutton(s) m ayneed resetting. c.Pow erswitch m aybe open. d.Co ntrolled equipmen tm aybe faulty. e.W iring leading tocontrolm aybe defective. Ifa thorough inspection ofthesepossibleconditionsfails tolocatethe trouble,proceed nexttoa check ofthe control'sswitch m echanism.
5.1.1 Che ck switch me chanism
- Pulldisconnectswitch orotherwise disconnectpow erto thecontrol. 2. Rem oveswitchhousing cover. 3. Disconnectpow erwiring from switch assem bly. 4. Swing m agnetassem blyin and outby hand tocheck care - fullyforany sign ofbinding.A ssembly shouldrequire minimalforcetom oveitthrough itsfullswing. 5. Ifbinding exists,magn etm aybe rubbing enclosing tube. Ifm agnetisrubbing,loosenmagn etclamp screw and shift magn etposition.R etighten magn etclamp screw. 6. Ifswitch m agnetassembly sw ingsfreelyand mechanism stillfailstoactuate,check installation ofcontroltobe certainitisw ithin the specified threedegreesofvertical. (Use spiritlevelon side ofenclosing tube in tw o places, 90° apart. 7. Check thecontinuityofthe microsw itch w ith ohmme ter. Replace imme diatelyiffound defective. 8. Ifswitch m echanism isoperating satisfactorily,proceedto check sensingunit.
13 44-604 Top Mounting LiquidLevelSwitches
5.1.2 Che ck com pleteunit
- Reconnectpowersupplyand carefullyactuate switch me chanism man ually(using a non-conductivetool)to determ ine whethercontrolled equipmen tw illoperate. Cau tion: W ithelectricalpow er on,care should be taken to avoid contact w ith sw itch leads and connections at terminal block. 2. Ifcontrolledequipmentrespondstom anualactuation test, troublemay be located in the levelsensing portionofthe control–float(s),stem(s),and magn etic attraction sleeve(s). N OTE: Ensure that liquid is entering the storage tank or vessel. A valvem ay be closed ora pipe line plugged. Cau tion: Be certain to pulldisconnect switchor otherwise ensure that electrical circuit(s)through control is deactivated. Close operating me dium supp ly valve on controls equipped w ithpneum atic sw itch me chanisms. 3. With liquidin tank orvessel,raisethe liquid levelabove thesetpoints.Magn etsshould“pull-in” on rising level.On Mo delT21 thelowerfloatactuatesthe upperswitch,and theupperfloatactuatesthelow erswitch.Ifmagnetsfailto “pull-in”,lowertheleveland purgepressure. a. D isconnectwiring from supplyside ofswitch me cha - nism (s) and remo veelectricalconduitoroperating me dium lineconnectionstoswitch housing. b. Rem oveswitchhousing assembly by looseninghex nut, which islocated imme diatelybelow housing base. 4. With switch housing assembly rem oved,inspectattraction sleeve(s) and insideofenclosing tube forexcessivecorro - sion orsolidsbuildup,w hich couldrestrictmo vement, preventingsleeve(s)from reaching fieldofswitchmag - net(s). 5. Ifdifferentialhasbeen changed in the fieldby reposition - ingthelowerjam nutson the floatstem ,checktightness and position ofthe jam nuts.RefertoFigure6. N OTE: Differentialadjustmentaffectsa change intheamo unt oflevel travel between switch-on and sw itch-offactuation. Do not attempt adjustment w ithout firstconsulting factory for assis - tance in com puting leveldifferentialchange foryourcontrol.
14 44-604 Top Mounting LiquidLevelSwitches
5.2 Agency Approvals
- Check floattobe certain itisbuoyantin the liquid(tank orvesselm usthaveadequateliquid level).Iffloatisdeter - mined to be filledw ithliquid,oritiscollapsed,itmu stbe replaced imm ediately.Do notattem pttorepaira float. Ifallcomp onentsinthe controlareinoperatingcondition, thetroublem ustbe (and shouldbe) located externaltothe control.R epeatinspectionofexternalconditionspreviously described. Whe n com m unicatingaboutyourcontrol,be certainto alwaysspecify the comp lete M odeland Serialnumbe rs. A G ENCY MO DEL AP PROVED APPROVAL CLAS SES FM A llwithan electricswitchmechan ism and a housing ClassI,Div1,Gr oups C & D listedas TYP E 4X /7/9 ClassII ,Div1,Gr oups E,F & G A llw ithan electricswitchmechan ism and a housing ClassI,Div1,Gr oups B,C & D listedas TYP E 4X /7/9ClassI,Div1,Group B ClassII ,Div1,Gr oups E,F & G CSA A llwitha SeriesF ,HS, H1,8 or 9 electricswitch ClassI,Div2,Gr oups B,C & D m echanism and a housinglistedas CSA TYPE 4X A llw ithan electricswitchmechan ism and a housing ClassI,Div1,Gr oups C & D listedas TYP E 4X /7/9 ClassII ,Div1,Gr oups E,F & G A llw ithan electricswitchmechan ism and a housing ClassI,Div1,Gr oups B,C & D listedas TYP E 4X /7/9ClassI,Div1,Group B ClassII ,Div1,Gr oups E,F & G ATEX /IEC Ex A llwithan electricswitchmechan ism and an ATEX II 2 G EEx d II C T6 ATE X housin g 94/9/EC IEC Ex Ex d II C T6 IP 66 CE Low Voltage Directives2006/95/EC InstallationCategoryII P erH armo nized Standard: Po llutionDegree 2 EN 61010-1/1993 & Am endm entNo. 1 Dual stageunitswith‘HS’ switchesarenot ATEX approved. IEC InstallationInstructions: The cableentryand closingdevicesshallbe Ex d certifiedsuitablefortheconditionsofuse and correctlyinstalled. Forambient temperaturesabove +55° C or forprocess temperaturesabove +150° C, suitable heatresistantcablesshallbe used. Heat extensions(betweenprocess connectionand housing)shallneverbe insulated. Specialconditionsforsafeuse: When theequipment isinstalledinprocess temperatureshigherthan +85° C thetemperature classificationmust be reduced accordingtothefollowingtableas per IEC60079-0. Maximum Process Temperature Temperature Classification < 85° C T6 < 100°C T5 < 135° C T4 < 200°C T3 < 300° C T2 < 450° C T1 These unitsareinconformitywithIECEx KEM 05.0020X ClassificationEx d II C T6 Tambient -40°C to+70°C
15 44-604 Top Mounting LiquidLevelSwitches
5.3 Specifications
5.3.1Physical inches (mm ) B 7.94* (201) A 2.44 (61) 1" NPT Distance to actuating level (4" min. Actuating level 6.25* (158) Housing AB ConduitConnections TYPE 4X/7/9, 5.93 3.87 1"NPT dualentry Group B (151) (98) NEMA 1 4.70 5.00 1⁄4 " NPT singleentry Pneumatics (119) (127) M odelT20 with 1"NPT Allhousingsrotatable360°. Pneumatic switchesavailablewithSeriesT20 unitsonly. 1.81 (45) Ref. B 7.94* (201) A Distance to□ actuating level□ (4" min) Actuating□ level 6.25* (158) Mo delT20 withflange *These dimensionsincreaseby 2.19(55)when unitis suppliedwithan HS switchwithterminalblock. 10.12 (257) 8.46 (214) B A Distance□ to lower□ actuating level Distance to upper actuating level (4" min.) Actuating level Actuating level 1.81 (45) Ref. 8" min. M odelT21 with flange NOTE: On Model T21 thelowerfloatactuates upper switchmechanism. The upper float actuatesthelowerswitchmechanism. DistanceTo Maximum Minimum Upper level 40" (1016) 4" (102) Lower level 48" (1219) 12"(305)
16 44-604 Top Mounting LiquidLevelSwitches
5.4 Replacement Parts
1 Ho using cover
2 Ho using base
3 Switch m echanism
4 At tractionsleeve
5 Jam nuts
6 Gui de wa sher(s)
7 Float stem
8 Float
9 Ada ptorbushing/guide tube assembly
10 Enclosing tube gasket
11 Enclosing tube
12 Moun ting flange
5.4.1 Mod elT20 PartsIdentification
17 44-604 Top Mounting LiquidLevelSwitches 5.4.1.1M odelT20 5.4.1.3Switchand housing reference 125 lb castiron 150 lb forged steel 300 lbforged steel 150 lbforged304 150 lbforged316 4" flange Z04 -5840 -001 Z04 -5840 -011 Z04 -5840 -016 004-584 0-021 004-5840-026 5" flange Z04 -5840 -002 Z04 -5840 -012 Z04 -5840 -017 004-584 0-022 004-5840-027 6" flange Z04 -5840 -003 Z04 -5840 -013 Z04 -5840 -018 004-584 0-023 004-5840-028 8" flange Z04 -5840 -004 Z04 -5840 -014 Z04 -5840 -019 004-584 0-024 004-5840-029 5.4.1.2M ountingflanges T20-1 T20-4 Ho using cover See below Ho using base See below Sw itch mec hanism See below Stem kit:includes items4, 5 ,6,& 7 Co nsultfactory Float: 3 " × 5" Z07-1202-003 4.00" Z07-1102-008 4.5 0" Z07-1102-009 A daptorbushing/guidetube assem bly Consultfactory Floatstem Consultfactory Enclosingtube gasket 012-1301-002 Enclosingtube Z3 2-6325-001 Z3 2-6325-002 Mo unting flange See below Important: Wh en orderingspareparts,please specify: A. Mod eland serialnum bers. B.Na me and partnum berofreplacement partorassembly. All replacem entpartsare forstandard models only.Consultyour localrepresentativefororderingassistanceon all speciallymodifiedmodels (modelnumbers preceded by an X). Series Type Bulletin# Dry contact B,C, D 42-683 Herm eticallysealed F 42-683 Herm eticallysealed HS, H1 42-694 Bleedtype pneumatic J 42-685 No n-bleed type pneuma tic K 42-48 6 High Tempe rature R, 8,9 42-799
18 44-604 Top Mounting LiquidLevelSwitches
5.4.2 Mod elT21 Parts Identification
1 H ousing cover
2 H ousing base
3 Sw itch m echanism
4 U pperattraction sleeve
6 Gu ide w asher(s)
7 U pperstem assem bly
8 Low erfloat
9 Low erattraction sleeve,stop tube,and washe rs
10 R etaining rings
11 U pperfloatand tube assemb ly
12 Ad aptorbushing
13 Enclosing tube gasket
14 Enclosing tube
15 Moun ting flange
16 Floatguide cage (optional)
17 Floatguide cage gasket(optional)
19 44-604 Top Mounting LiquidLevelSwitches 5.4.2.1M odelT21 Series Type Bulletin# Dry contact B,C ,D 42-683 Herm eticallysealed F 42-683 Herm eticallysealed HS, H1 42-694 Bleed type pneumatic J 42-685 Non -bleed type pneumatic K 42-4 86 High Tempe rature Snap R, 8,9 42-799 5.4 .2.3Switchand housing reference 5.4.2.2M ountingflanges 125 lb castiron 150 lb forged steel 300 lbforged steel 150 lbforged304 150 lbforged316 4" flange Z04 -5840 -001 Z04 -5840 -011 Z04 -5840 -016 004-584 0-021 004-5840-026 5" flange Z04 -5840 -002 Z04 -5840 -012 Z04 -5840 -017 004-584 0-022 004-5840-027 6" flange Z04 -5840 -003 Z04 -5840 -013 Z04 -5840 -018 004-584 0-023 004-5840-028 8" flange Z04 -5840 -004 Z04 -5840 -014 Z04 -5840 -019 004-584 0-024 004-5840-029 Important: Wh en ordering spareparts,please specify: A. Mo deland serialnum bers. B. Na me and partnumb erofreplaceme ntpartorassembly. A llreplaceme nt partsarefor standard models only.Co nsultyour localrepresentativefororderingassistanceon all speciallym odifiedm odels(modelnumbers preceded by an X). T21-1 T21-4 H ousing cover See below H ousing base See below Sw itch mec hanism See below Floatstem kit:includesitems 4, 5, 6,& 7 Co nsultfactory Low erfloat: 3 " × 5" Z07-1201-003 Z07-1202-003 4.00" Z07-1101-015 Z07-1102-008 4.5 0" Z07-1102-009 Uppe rfloatand tube assemb lykit:includes items9,10,& 11 Consultfactory A daptorbushing Z04-57 34-110 004-5734-123 Enclosingtube gasket 012-1301-002 Enclosingtube Z32-63 25-004 Z32-6325-005 Mo unting flange See below G uide cage kits:includes items 16 & 17 Consultfactory
20 44-604 Top Mounting LiquidLevelSwitches FloatDiameter Tank Connection 3.00x 5.00(76 x 127) 4.00(102) 4.50(114) 1"NPT B2A B2B B2C 4" 125 lb.C.I.flange H2A —— 4" 150 lb.F .S.flange H3A —— 5" 125 lb.C.I.flange J2A J2B J2C 5" 150 lb.F .S.flange J3A J3B J3C 6" 125 lb.C.I.flange K2A K2B K2C 6" 150 lb.F .S.flange K3A K3B K3C 6" 300 lb.F .S.flange —— K4C Model No. Set Points Tank Connection Floatand Trim Sleeve T20-1 1—Single float Carbon steel 300 SeriesSS 400 SeriesSS T20-4 316 SS 316 SS 316 SS Liquid FloatSize Specific 3.00x 5.00 4.00 4.50 Gravity (76 x 127) (102) (114) 1.00 39 (991) 48 (1219) 48 (1219) 0.90 20 (508) 33 (838) 48 (1219) 0.80 — 11(279) 48 (1219) 0.70 —— 38 (965) 0.60 —— 6 (152) IM POR TANT: Act uatinglevel(s),ineither therisingor fallingstate,and specificgravity m ustbe providedupon placementoforder. TANK CONNE CTION AN D FLOAT SIZE IMP OR TANT: The m aximum availableinsertiondepth isgoverned by theliquidspecificgravityand selected float size as giveninthetablebelow.The minimum insertiondepth isfourinches. MO DEL NUM BE R CODE AND M ATERIALS OF C ONSTRUCTION MA XIMUM INSERTION LENGTH inches (mm)
5.5 Mod elNumber s
5.5.1 M odelT20
FloatSize PressureRatingPSIG (bar) Inches (mm) 100°F 750° F 900°F 1000°F 3.00 x 5.00 500 377 353 335 4.00 600 483 465 459 4.50 500 403 388 383 FLOAT PRESSURE RATINGS FlangesareANSI standardthreadedonto 1"NPT bushing.Forged steel flangeshave standardraisedface. Not availablewithModel T20-4. Availableonlyincastiron. Availablewithmaterialoptioncode 1 only.C/Fforstainlesssteelconstruction. Process temperaturebased on +100°F (+38°C)ambient. Uncontrolledhousingheateror drainavailableinTYPE 4X/7/9enclosure. ConsultfactoryforTYPE 4X/7/9castironhousings. On steam applications,temperaturedown-ratedto+400° F (+204°C)process at+100°F (+38°C)ambient. CSA approvaldoes not applytoSeriesHE switches.
Maximum Maximum Switch Supply Process Bleed Orifice NEMA 1 Description Pressure Temperature Diameter 100psig .063 JDE (7bar) 400° F (1.6mm) SeriesJ 60 psig (204°C) .094 JEE BleedType (4 bar) (2.4mm) 100psig 700°F .055 JFE (7bar) (371°C) (1.4mm) SeriesK 100psig — KOE Non-Bleed (7bar) 400° F 40 psig (204°C) — KOG (3 bar) 21 44-604 Top Mounting LiquidLevelSwitches ELECTR IC SWIT CH ME CHANIS M A ND ENCLOSURE PNEUM ATIC SWITCH M ECHANISM AND ENCLOSURE Switch
Description
Process Temperature Range °F (°C) Contacts Set Points T20-1Models T20-4 Models TYPE 4X/7/9 Aluminum Enclosure ClassI,Div1 Groups C&D ClassI,Div1 Group B ATEX Ex II2 G EEx d IICT6 ClassI,Div1 Groups C&D ClassI,Div1 Group B ATEX Ex II2 G EEx d IICT6 SeriesB Snap Switch -40 to+250 (-40to+121) SPDT 1 BKP BKT BAC BKQ BKS BA9 DPDT 1 BNP BNT BBC BNQ BNS BB9 SeriesC Snap Switch -40 to+450 (-40to+232) SPDT 1 CKP CKT CAC CKQ CKS CA9 DPDT 1 CNP CNT CBC CNQ CNS CB9 SeriesD DC Current Snap Switch -40 to+250 (-40to+121) SPDT 1 N/A DKQ BKS DA9 DPDT 1 DNQ DNS DB9 SeriesF HermeticallySealed Snap Switch -50 to+750 (-46to+399) SPDT 1 FKP FKT FAC FKQ FSS FA9 DPDT 1 FNP FNT FBC FNQ FNS FB9 SeriesHS HermeticallySealed 5-amp Snap Switch withWiringLeads -50 to+550 (-46to+288) SPDT 1 HMC HEK N/A HMC HEK N/A DPDT 1 HMF HET HMF HET SeriesHS HermeticallySealed 5-amp Snap Switch withTerminalBlock -50 to+550 (-46to+288) SPDT 1 HM3 HM4 HA9 HM3 HM4 HA9 DPDT 1 HM7 HM8 HB9 HM7 HM8 HB9 SeriesH1 HermeticallySealed 1-amp Snap Switch withWiringLeads -50 to+750 (-46to+399) SPDT 1 HKC N/A HKC N/A SeriesR High Temperature Snap Switch -40 to+750 (-40to+399) SPDT 1 RKQ RKS RA9 RKQ RKS RA9 DPDT 1 RNQ RNS RB9 RNQ RNS RB9 Series8 HermeticallySealed Snap Switch -50 to+750 (-46to+399) SPDT 1 8KP 8KT 8AC 8KQ 8KS 8A9 DPDT 1 8NP 8NT 8BC 8NQ 8NS 8B9 Series9 High Temperature HermeticallySealed Snap Switch -50 to+750 (-46to+399) SPDT 1 9KP 9KT 9AC 9KQ 9KS 9A9 DPDT 1 9NP 9NT 9BC 9NQ 9NS 9B9 Switch Process Temp. Range °F (°C) Contacts Set Points CS/Aluminum Cast Iron CS /Aluminum Cast Iron NEMA 4X ClassI,Div1 Groups C&D ClassI,Div1 Group B NEMA 4X ClassI,Div1 Groups C&D ClassI,Div1 Group B SeriesR High Temperature Snap Switch -40 to+1000 (-40to+538) SPDT 1 R1Y RKY RKW R1Y RKY RKW DPDT 1 RDY RNY RNW RDY RNY RNW Series9 High Temperature HermeticallySealed Snap Switch -50 to+1000 (-46to+538) SPDT 1 9AR 9KR 9KV 9AY 9KY 9KW DPDT 1 9DR 9NR 9NV 9DY 9NY 9NW
22 44-604 Top Mounting LiquidLevelSwitches M ODEL NUMBER CODE AND M ATERIALS OF CONSTRUCTION Model No. Set Points Tank Connection Floatand Trim Sleeve T21-1 2—Tandem float Carbon steel 300 SeriesSS 400 SeriesSS T21-4 316 SS 316 SS 316 SS IMPO RTANT : Ac tuatinglevel(s),ineithertherisingor fallingstate,and specificgravity mu stbe provided upon placement oforder. FlangesareANSI standard.Forged steelflangeshave standardraisedface. Not availablewith-4 MaterialsofConstruction. Availableonlyincastiron. Process temperaturebased on +100°F (+38°C)ambient. Uncontrolledhousingheateror drainavailableinTYPE 4X/7/9enclosure. ConsultfactoryforTYPE 4X/7/9castironhousings. On steam applications,temperaturedown-ratedto+400° F (+204°C)process at+100°F (+38°C)ambient. TANK CONNECT ION AND FLOAT SIZE FloatDiameter Tank Connection 3.00x 5.00(76 x 127) 4.00(102) 4.50(114) 4" 125 lb.C.I.flange H2A —— 4" 150 lb.F .S.flange H3A —— 5" 125 lb.C.I.flange J2A J2B J2C 5" 150 lb.F .S.flange J3A J3B J3C 6" 125 lb.C.I.flange K2A K2B K2C 6" 150 lb.F .S.flange K3A K3B K3C 6" 300 lb.F .S.flange —— K4C FloatSize Liquid 3.00x 5.00 4.00 4.50 Specific (76 x 127) (102) (114) Gravity Upper Lower Upper Lower Upper Lower 1.00 21 48 32 48 40 48 0.90 9 30 18 44 40 48 0.80 —— 4 21 40 48 0.70 ———— 21 48 (533) (1219) IM POR TANT: The m aximum availableinsertiondepth isgoverned by theliquidspecificgravityand selected float size as giveninthetable below.The minimum insertiondepth isfourinches.The minimum distance between the top and bottom insertiondepthsiseightinches. M AX IMUM INS ERTION LENGTH inches (mm)
5.5.2 M odelT21
FloatSize PressureRatingPSIG (bar) Inches (mm) 100°F 750° F 900°F 1000°F 3.00 x 5.00 500 377 353 335 4.00 600 483 465 459 4.50 500 403 388 383 FLOAT PRESSURE RATINGS
23 44-604 Top Mounting LiquidLevelSwitches ELECTRIC SW ITCH M ECHANISM AND ENCL O SURE Switch Process Temperature Range °F (°C) Contacts Set Points T21-1Models T21-4 Models TYPE 4X/7/9 Aluminum Enclosure ClassI,Div1 Groups C&D ClassI,Div1 Group B ATEX Ex II2 G EEx d IICT6 ClassI,Div1 Groups C&D ClassI,Div1 Group B ATEX Ex II2 G EEx d IICT6 SeriesB Snap Switch -40 to+250 (-40to+121) SPDT 2 BLA BLJ BDC BLB BLK BD9 DPDT 2 BOA BOJ BGC BOB BOK BG9 SeriesC Snap Switch -40 to+450 (-40to+232) SPDT 2 CLA CLJ CDC CLB CLK CD9 DPDT 2 COA COJ CGC COB COK CG9 SeriesD DC Current Snap Switch -40 to+250 (-40to+121) SPDT 2 DLB DLK DD9 DLB DLK DD9 DPDT 2 DOB DOK DG9 DOB DOK DG9 SeriesF HermeticallySealed Snap Switch -50 to+750 (-46to+399) SPDT 2 FLA FLJ FDC FLB FLK FD9 DPDT 2 FOA FOJ FGC FOB FOK FG9 SeriesHS HermeticallySealed 5-amp Snap Switch withWiringLeads -50 to+550 (-46to+288) SPDT 2 HMN HMP N/A HMN HMP N/A DPDT 2 HMY HMZ HMY HMZ SeriesH1 HermeticallySealed 1-amp Snap Switch withWiringLeads -50 to+750 (-46to+399) SPDT 2 HKN HKP N/A HKN HKP N/A SeriesR High Temperature Snap Switch -40 to+750 (-40to+399) SPDT 2 RLB RLK RD9 RLB RLK RD9 DPDT 2 ROB ROK RG9 ROB ROK RG9 Series8 HermeticallySealed Snap Switch -50 to+750 (-46to+399) SPDT 2 8LA 8LJ 8DC 8LB 8LK 8D9 DPDT 2 8OA 8OJ 8GC 8OB 8OK 8G9 Series9 High Temperature HermeticallySealed Snap Switch -50 to+750 (-46to+399) SPDT 2 9LA 9LJ 9DC 9LB 9LK 9D9 DPDT 2 9OA 9OJ 9GC 9OB 9OK 9G9 Switch Process Temp. Range °F (°C) Contacts Set Points CS/Aluminum Cast Iron CS /Aluminum Cast Iron NEMA 4X ClassI,Div1 Groups C&D ClassI,Div1 Group B NEMA 4X ClassI,Div1 Groups C&D ClassI,Div1 Group B SeriesR High Temperature Snap Switch -40 to+1000 (-40to+538) SPDT 2 R3M RLM RLW R3M RLM RLW DPDT 2 REM ROM ROW REM ROM ROW Series9 High Temperature HermeticallySealed Snap Switch -50 to+1000 (-46to+538) SPDT 2 9BD 9LD 9LV 9BM 9LM 9LW DPDT 2 9ED 9OD 9OV 9EM 9OM 9OW
B ULLETIN: 44- 604.16 EFFECTIVE: M ay 2010 SU PERSEDES: September 2009 ServicePolicy Ow nersofMa gnetrolma y requestthe returnofa controlor any partof a control forcomp leterebuilding or replace - me nt.T hey willbe rebuiltor replaced promptly.Con trols returned under our servicepolicy mu st be returned by Prepaidtransportation.Ma gnetrolw illrepairor replacethe controlatno cost to the purchaser(or owner) otherthan transportation if: 1. R eturned withinthe warrantyperiod; and 2. T he factoryinspection findsthe causeofthe claimto be covered underthe warranty. Ifthe troubleistheresultofconditionsbeyond ourcontrol; or,is N OT covered by the warranty,therewillbe charges forlaborand the partsrequiredto rebuildor replacethe equipment. In some cases it m ay be expedient to shipreplacement parts; or,in extrem e casesa complete new control,to replacethe originalequipmentbefore itisreturned.Ifthis isdesired,notifythe factory of both the model and serial numbersofthe controltobe replaced.In such cases,credit forthe materialsreturnedwillbedeterm ined on thebasisof theapplicabilityofourwarranty. No claimsformisapplication,labor,directorconsequential damage w illbe allowed. Return M aterialProcedure So that w e m ay efficientlyprocessany m aterialsthatare returned, it is essential that a “Return Ma terial Authorization” (RMA) num berbeobtained from thefactory , prior to the m aterial'sreturn. T hisisavailable through Mag netrol’slocalrepresentative orby contacting the factory . Pleasesupplythe following inform ation: 1. Co mpan y Name 2. D escription ofM aterial 3. SerialNum ber 4. R eason forR eturn 5. A pplication Any unitthat was used in a process m ust be properly cleaned in accordance w ith O SHA standards,before itis returned to the factory. A MaterialSafety Data Sheet (M SD S) m ust accompany materialthatw asusedinany m edia. All shipmentsreturned to the factory m ust be by prepaid transportation. Allreplacem entsw illbe shipped F .O.B.factory. AS SU RED Q UA LITY & SERVICE COST LESS 5300 Belmont Road • Downers Grove, Illinois 60515-4 499 • 630-969-4000 • Fax 630-969-9489 • www.magnetrol.com
145 Jardin Drive, Units 1 & 2 • Concord, Ontario Canada L4K 1X7 • 905-738-9600 • Fax 905-738-1306
Heikensstraat 6 • B 9240 Zele, Belgium • 052 45.11.11 • Fax 052 45.09.93 Regent Business Ctr., Jubilee Rd. • Burgess Hill, Sussex RH15 9TL U.K. • 01444-871313 • Fax 01444-871317 Copyright © 2010 Magnetrol Internatio nal, Incorporated. All rights reserved. Printed in the USA. Performance specifications are effective with date of issue and are subject to change without notice. Ma gnetroland Magnetrollogotype areregisteredtrademarksofMagnetrolInternational. CS A logotype isa registeredtrademark ofCanadian StandardsA ssociation