Download MC 1210 - Scotsman Ice Systems
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@ a' .I -r z MANUAL SERVICE ÍI E 0 F o 0 0 a: t:'ll Rflg flqil0 Electronic modular cubers 090086.33REV.03/94 Page 1 a Tableof contents TABLEOF Specifications MC 1210 CONTENTS page GENERALINFORMATION ANDINSTALLATION Introduction - ModularCuber Unpacking andInspection Unpacking andInspectionStorageBin Location andlevelling installation Stacking : Mixedunitsinstallation : Electronic unitsinstallation Electrical connections Watersupplyanddrainconnections Finalchecklist practice Installation a e 4 4 4 5 5 7 8 8 8 9 OPERATING INSTRUCTIONS Startup Operational checks 10 11 (Howit works) OPERATING PRINCIPLES Freezing cycle Defrostor Harvestcycle - Controlsequence Operation - Electrical Operation sequence Component description 15 17 18 18 19 ADJUSTMENT, REMOVAL ANDREPLACEMENT PROCEDURES Adjustment of thecubesize Replacement of evaporator temperature sensor Replacement of condenser temperature sensor Replacement of ambienttemperature sensor Replacement of icelevellightcontrol Replacement of P.C.Board Replacement of thewaterpump Replacement of waterinletsolenoid valve Removalof theflowcontrol Replacement of hotgasvalvecoil Replacement of waterdrainsolenoid valve Replacement of waterdrainelectronic timer Replacement of fan motor Replacement of spraybar Replacement of drier Replacement of hotgasvalvebody platen Replacement of evaporator Replacement of aircooledcondenser Replacement of watercooledcondenser Replacement of waterregulating valve(watercooledmodels) Replacement of compressor Wiringdiagram Servicediagnosis 23 24 24 24 24 24 25 25 25 25 25 25 26 26 26 26 26 26 27 27 27 28 29 MAINTENANCE ANDCLEANING INSTRUCTIONS General lcemaker instructions Cleaning of watersystem 31 31 32 I I l :I l :l Page 2 t SPECIFICATIONS ELECTRONICCUBERMODEL MC 1210 requirements: operating lmpodant MAX MIN 10"c(50"F) 40'c(100'F) Airtemperature 5"C(40"F) 40"C(100"F) temperature Water 1 bar(14psi) 5 bars(70Psi) Waterpressure variations voltage Electr. rating fromvoltage +6% onnameplate -'10% specified u ice makingcapacity WATERCOOLEDMOT}ELS AIR COOLED MODELS @ E I 10 U) 600 [! S 550 kÍ tt ul fr ft 5oo I(r 450 ^u 4oo o = 6so uJ N N (r ul u Kg. 700 t Kg. 650 t,lJ (! 3 2 U F z U À 3 8 u o F 600 t uJ 5 w ul l ó o E F s00 z U 6 = 400 3 8 3 2 2 7 2 1 1 5 l 0 TEMPERATURE WATER 5 38 32 27 21 15 l0 WATERTEMPERATURE NOTE.Thedaityice-makingcapacityis directlyrelatedto thecondenserair inlettemperature,water and age of the machine. temperature Tokeep vour SCOTSMANMODIILARCLIBERat peakperformancelevels,periodicmaintenanee checkéhust be carried-outas indicatedon page37 of thismanual. Productionchartsshownare indicatingtheproductionof MCMand MCLmodels.ForMCSmadels ice productionis approx. 10/olower. t-, Page 3 o SPECIFICATIONS l*i|= tl . a a 32r"615 lAIER Ilt Ft ACCESSORIES: KSC1210- Cubestacking kit DIMENSIONS: a HEIGHT WIDTH DEPTH WEIGHT 8 1 0m m . 1677 mm. 775 mm. Kgs. MC 1.210.MACHINESPECIFICAT]ONS Model Cond.unit Finish Comp.HP Air Water Stainless steel Stainless steel 5 M C 1 2 î 0A S M C 1 2 1 0W S Basic electr. o Basic electr. Amps M C 1 2 1 0A S 380/50/3+N7 M C1 2 1 0W S Water reo. - lV24 HR 1300 10200 Start amps. Watts ElectricDowercons. Kwh x 24 HR N. of wires Amps.fuse 52 4000 80 5x2.5mm 20 Cubesperharvest: MCL288large- MCM408medium- MCS792small. ' Subiectto variation accordingto ditlerentwaterandambienttemperature conditions. Page 4 ANDINSTALLATION GENERALINFORMATION A. INTRODUCTION andthe thespecifications Thismanualprovides procedu startresfortheinstallation, step-by-step for maintenance andcleaning upandoperation, CUBERMC1210. MODULAR theSCOTSMAN ModularCubersof theMC 1210 TheElectronic and seriesare qualitydesigned,engineered manufactured. tested Theiricemakingsystemsarethoroughly providing to fit theneeds theutmostin flexibility user. of a particular listings: forthefollowing Thisproductqualifies a@@ to our havebeenengineered Theseicemakers standards. own rigid safetyand performence TheVDE- SEV- WRCsealssignifythattheyare listedwiththemandthattheycomplywiththe of them. standard materials and manufacturing Thesesealsalso signifythat theseicemaker andtestedby VDE modelshavebeeninspected - SEV- WRCinspectors whoreserve therightto at icemakers periodically examineproduction compliance. thefactoryto assurecontinued NOTE.Toretainthesafetyandpertormance built into this icemaker,it is importantthat installationand maintenancebe conducted in the manneroutlinedin thismanual. StorageBin SincetheMC 1210ModularCuberdo nothave theirownattachedicestoragebin,it is necessary to usethe Bin B 120. b,/ stripsecuring theplastic 3. a)Cutandremove the cartonboxto the skid. the b) Removethe packingnailssecuring cartonboxto the skid. thetopofthecartonandremove c)Cutopen sheet. the polystyreprotection d) Pull out the polystyrepostsfrom the cornersandthenremovethecarton. 4. Removetopandallsidepanelsof theunit and inspectfor any concealeddamage.Notify as yourclaim fortheconcealed damage carrierof statedin step2 above. 5. Removeall internalsupportpackingand maskingtapeandthe hardwarepackage. lines do not rub 6. Checkthat refrigerant andthat ortouchotherlinesor surfaces, against thefanblademovesfreely. u _ fitssnuglyonto 7. Checkthatthecompressor pads. all itsmounting B. Seedataplateon the rearsideof the unit and checkthat localmainvoltagecorresponds on it. withthevoltagespecified CAUTION.lncorrectvoltagesuppliedto the icemakerwill void your parts replacement program. registration 9. Removethe manufacturer's cardfromtheinsideof theUserManualandfillModelandSerialNumber in all partsincluding: takenfromthedataplate. F o r w a r d t h e c o m p l e t e ds e l f- a d d r e s s e d cardto Frimonîfactory. registration \,, StorageBin-B120 1. Followthesteps1,2 and3aboveîo unpack thestoragebin. B. ANDINSPECTION UNPACKING layit downon itsrearsideandfit 2. Carefully thefourlegsintotheirsockets. ModularCuber 3. Removeall internalsupportpackingand maskingtape as well as the plasticice cube 1. CallyourauthorizedSCOTSMANDistributor deflector. or Dealerfor properinstallation. of thepacking inspecttheexterior 2. Visually and skid.Any severedamagenotedshouldbe carrieranda concealed tothedelivering reported of claimformfilledinsubjettoinspection damage the contentswith the carrier'srepresentative present. registration 4. Removethe manufacturer's cardfromtheinsideof theUserManualandfillModelandSerialNumber in all partsincluding: takenfromthedataPlate. F o r w a r d t h e c o m p l e t e ds e l f- a d d r e s s e d cardto Frimontfactory. registration \.- ! Page5 a C. LOCATION ANDLEVELLING ThislceCuberis designedfor WARNING. indoorinstallationonly.Extendedperiods of operation at temperatureexceeding the following limitationswill constitute misuseunderthetermsof theSCOTSMAN Manufacturer's LimitedWarrantyresulting in LOSSof warrantycoverage. permanent 1. Position theBinintheselected location. for selection include: Criteria of location a) Minimum roomtemperature 10"C(50'F) roomtemperature 40"C(100'F). andmaximum minimum b) Waterinlettemperatures: 5oC (40"F)and maximum 40'C(100"F). locationfor air cooled c) Well ventilated models.Cleanthe air cooledcondenser at frequent intervals. d)Service access:adequate spacemustbe leftforallservice connections through therearof of 15 cm the ice maker.A minimumclearance (6")mustbeleftatthesidesoftheunitforrouting coolingairdrawnintoandexhausted outof the compartment to maintainpropercondensing ooeration of aircooledmodels. 2. LeveltheStorageBinAssyin boththeleft to rightandfrontto reardirections by meansof legs. theadjustable gasket Storage Bintopmounting 3. Inspectthe whichshouldbeflatwithnowrinkles, to provide a good sealingwhen the ModularCuberis installed on topof it. \ 10. Installthe twoplasticicecubedeflectors by hookingthem on the flangeof the ice chute in unitbase(seeillustration). openings D. STACKINGINSTALLATION A StackingKit KSC 1210is availableas an of accessory on requestto allowthe installation Cubersoneon topof theother. two Modular TheStacking Kitis consisting of: a ) t w o p l a s t i c r e i n f o r c e dl c e C h u t e Connections P.C.Board b) an Interface c) an Extension Cable enablingto cover any stackinginstallation combination as: Modular a) Whenstackingan Electronic type (Earlier Cuberon an Electromechanical series). Modular b) Whenstackingtwo Electronic Cubers. Mixedunits installation 1. Unloosethe screwsand removethe top panels. 4. PlacetheModular Cuberontopof Storage binusingcarenotto wrinkleor tearthegasket. 2. Trace and removefrom the top of the metalbracket evaporator of Electronic Cuberthe to be usedto securethe ice levelcontrolassv insidethestoragebin Cuberfrontsidein 5. Lifta littlebittheModular orderto be ableto mount,in oneof thetwoice chuteopenings, theicelevelcontrolbracket. Cuberfront sidein 3. Lifta littlebittheModular orderto be ableto mountthe ice levelcontrol bracket. 6. Removethe PVCplasticplugclosingthe roundholelocated besidetheicechuteopening. Modular Cuberontopof 4. PuttheElectronic unit. the Electromechanical for 7. Tracetheicelevelcontrolassy, secured ontothetopoftheevavorator ofthe thetransport ModularCuber,anddirectit downthroughthe roundholeintotheStorageBin. unplugged theicechutesfromboththeunits 5. Remove of andinsert, through theicedischarge openings lce Chute the upperunit,the plasticreinforced Connections. Securethe ice levelcontrolassy on its L bracketby meansof thetwoscrewsfoundin the package withthe unit. hardware supplied 9. Makea cut (shear)in thePVCplasticplug thatgoesfromitsedgeto thecenter;insertthe icelevelcontrolcablein thecenterof theplastic plugso to preventit fromanysortof contactwith theunitframe,thenplaceagainthePVCplugin the roundhole keepingthe cableexceeding insidetheunit. oortion the ice levelcontrolterminal 6. Disconnect plugfromtheP.C.BOARDof Electronic Modular Cuber. 7. Installandsecuretheicelevelcontrolassy onitsbracketbymeansofthetwoscrewssupplied withtheunit. 8. Directtheicelevelcontrolcablefirstto pass opening of thebottom through theicedischarge Page 6 machinewith the protectivesheathcorrectly locatedin correspondance of thisopeningand into thento passthrough theroundholeprovided Modular thebaseoftheElectronic Cuber(Upper unit). 9. Connectthe electricplugof the ice level controlcable to theCableExtension, thenplugin thisoneintoits P.C.BOARDsocket. 10. Rotateclockwisethe TRIMMERsetting screwlocatedin thefrontof P.C.BOARD,to its power,so to compensate maximum thegreater resistencecausedby the Cable Extension addition. NOTE. Replace the existing ice deflector/ withthenewlonger bulbholdercombination one,part number66049801, to preventthe light beam of the lce Level Controlfrom inErterringwith it. e 11. Stick,withaccuracy, therubberstripeonto the upperedgeof thefrontpanelsof the lower unitin orderto fill the air gap betweenthe two machines. 12. Placeagainin theirposition theicechutes andfinallyre{italltheservicepanelspreviously removed. C G \- PageT Electronicunits installation 1. Unloosethe screwsand removethe top panels. 2. Putthe secondElectronic ModularCuber ontothebottomoneandalignethetwocabinets correctly. 3. Removetheicechutesfromboththeunits andinsert, through theicedischarge openings of the upperunit,the plasticreinforced lce Chute Connections. 4. Disconnect the ice levelcontrolterminal plugfromtheP.C.Boardof theupperElectronic ModularCuber(nowcolledunit 2). L Connectthe secondaryOUTLETplug (longerwire)of the Interface P.C.Board to the P.C.Boardsocketof theunit 2 (seedrawing). 9. Turn clockwise(to its max. power)the TRIMMERsettingscrew(locatedon the front centerof P.C.Board)oftheicelevelcontrol ofthe unit2. 10. The Interface P.C.Boardis nowready to -two stop simultaneously the operationof the unitswhenthe infraredbeamof the ice level controlis interrumped by thestoredicecubes. ATTENTION.After removal of the ice cubes to re-establishthe infraredbeam 5. Securethe InterfaceP.C. Boardto the bothunitsresumetheiroperationstarting contactormetalbracketof the lowerunit (now from the beginningof freezingcycle. calledunit 1) by meansof the suppliedplastic clamp. Duringthe first freezingcycleit couldbe possiblethat the ice cubes producedby 6. Disconnect the ice levelcontrolterminal one of the two ice makersbe not of the plugfromtheP.C.Boardoftheunit1 andconnect correctshape(cloudyand shallow)due ittotheINLETsocketofthelnterface P.C.Board to an insufficientwater level in its sump (shorter wire). tank.This minorproblemwilldesappear 7. ConnecttheprimaryOUTLETterminalplugin the next batchbecausein the coming harvest cycle the sump tank will be of the InterfaceP.C. Board(wireof medium properlyfilled-up. lenght)to the P.C.Board socketof theunit 1. I Page8 : :l therubberstripeonto 11. Stick,withaccuracy, the upperedgeof thefrontpanelsof the lower unitin orderto fill the air gap betweenthe two machines. lf water containsa high levelof impurities,it is advisable to consider the installationof an appropriatewaterfilteror conditioner. theicechutes 12. Placeagainin theirposition and finallyre-fitthe servicepanelspreviously removed. Watersupply- Watercooledmodels D. ELECTRICALCONNECTIONS to See data plate for currentrequirements determinewire size to be used for electrical require icemakers AllSCOTSMAN connections. a solidearthwire. from aresupplied icemachines AllSCOTSMAN pre-wired only andrequire completely thefactory powerconnections to the wire cord electrical at rearof theunit. orovided to its Makesurethattheicemachineisconnected fused(seedataplate owncircuitandindividually forfusesize). variation should Themaximum allowablevoltage not exceed-10%and + 6/" ol the data plate rating.Lowvoltagecancausefaultyfunctioning for seriousdamageto and maybe responsible switchandmotorwindings. theoverload NOTE.Allexternalwiringshouldconformto national,state and local standardsand regulations. Checkvoltageon the lineand the ice maker's the unit. dataplatebeforeconnecting I lce Thewatercooledversionsof SCOTSMAN inletwatersupplies, Makersrequiretwoseparate one for the watersprayedfor makingthe ice cubes and the other for the water cooled condenser. Connectthe 314"malefittingof the waterinlet, usingflexibletubingor a 3/8"O.D.copperpipe, plumbing tothécoldwatersupplylinewithregular fittinoand a shut-offvalve installedin an acceésiblepositionbetweenthe watersupply lineandtheunit. Waterdrain I draintube is a plasticor The recommended tubewith18mm(3/4')l.D.whichrunsto flexible an opentrappedand venteddrain.Whenthe drainis a longrun,allow3 cmpitchpermeter(1/ 4" pitchperfoot). isalsorequired unitdrain connection Aventatthe for propersumpdrainage. Waterdrain- Watercooledmodels Connectthe 3/4"malefittingof the condenser tubingora a secondflexible waterdrain,utilizing and totheopentrapped 3/8"O.D.coppertubing, venteddrain. E. WATERSUPPLYANDDRAIN CONNECTIONS General Whenchoosing thewatersupplyfortheicecuber shouldbe givento: consideration a) Lengthof run b) Waterclarityandpurity watersupplypressure c) Adequate singleingredient Sincewateristhemostimportant much iceyoucannotemphasizetoo inproducting thethreeitemslistedabove. Low water pressure,below 1 bar may cause malfunction of the icemakerunit. willtendto minerals excessive Watercontaining producecloudycolouredice cubes,plusscale build-up on partsof thewatersystem. Watersupply water Connectthe3/4"malefittingofthesolenoid foodgradeflexible inletvalve,usinganapproved tubeora 3/8"O.D.copperpipe,to thecoldwater supplylinewith regularplumbingfiltingand a position in an accessible shui-offvalveinstalled thewatersupplylineandtheunit. between NOTE.The watersupply and the waterdrain must be installed to conform with the local code. ln some cases a licensedplumber and/ or a plumbing permit is required. F. t FINAL CHECK LIST 1. ls the unit in a room where ambient temperaturesare within a minimum of 10'C (50dF)even in wintermonths? 2. ls there at least a 15 cm (6") clearance aroundthe unitfor properair circulation? 3. Are the storagebin and the unit in level? (TMPORTANT) 4 . H a v e a l l t h e e l e c t r i c a la n d p l u m b i n g beenmade,and is the watersupply connections shut-offvalveopen? 5. Has the voltage been tested and checked againstthe data plate rating? \ Page 9 a 6. Has the water supply pressurebeen checkedto ensurea waterpressureof at least1 bar(14psi). 10. Hasthe owner/user beengiventhe User Manualand beeninstructed ontheimportance of periodic maintenance checks? 7. Checkallrefrigerant linesandconduitlines to guardagainstvibrations andpossible failure. 11. Has the Manufacturer's registration card beenfilledin properly? Checkforcorrectmodel and serialnumberagainstthe serialplateand mailthe registration cardto thefactory. Havetheboltsholding L thecompressordown beencheckedto ensurethatthecompressor is pads? snuglyfittedontothe mounting 9. Havethebinlinerandcabinetbeenwiped clean? H. 12. Hastheownerbeengiventhenameandthe phonenumberof the authorized SCOTSMAN ServiceAgencyservinghim? INSTALLATIONPRACTICE ' 1 . Hand shut-off valve 2 . Waterfilter ? Watersupplyline (flexible hose) 4 . 3/4"malefitting 5 . Powerline 6 . Mainswitch 7 . Drainfitting 8 . Venteddrain 9 . Drainfitting 1 0 . Venteddrain 11. Opentrappedventeddrain WARNING. This icemakeris not designedfor outdoorinstallationand will not functionin ambienttemperatures below10"C(50'D or above40'C (100"F). This icemakerwill malfunctionwith water temperatureébeloirv5'C (40'F) or above 40'C (100.F). --.--- : - Page10 { INSTRUCTIONS OPERATING i I I I I I STARTUP theicemakerand installed Afterhavinocorrectly lectrical c o m o l e t e dt h e p l u m b i n ga n d e"Start-up" performthe following conn'ections, procedure. theunitfrontpanelandlocatethe A. Remove controlbox. B. Throughthe controlbox coverlocatethe screwhead)of to a fillister grooved treàdlsimitar selector. theelectronic Program turnthe Withthe helpof a reqularscrewdriver (The position. heailintheOPERATION selector bitmustfittheheadslotendto end, screwdriver thisto avoidto spoiltheselectorheadslot). i I l NOTE.Every time the unit returns under power, beenswitchedoff, both 'the after-having waterinletvalveandthehotgasvalveget energizedfor a periodof 5 minutes,thus to admlt new water to the machine sumP reseruoirtofillit up and,eventually,to wash off any dirt that can have depositedin it duringthe unitoff period(Fig.1). I i I : D. Duringthe waterfillingoperation,checkto throughthe seethattheincomingwaterdribbles, evaporatorplatendribblerholes,down into the sump reservoirto fill it up and also that the incoiningsurplusof waterflowsout throughthe overflowpipe intothe drainline. Duringtfte water fillingphase the components energizedare: I WATER INLETSOLENOIDVALVES HOT GAS SOLENOIDVALVES powerto the unit to start.it up by C. Give"Óru" tne powerlinemaindisconnect switching switch. WATER DRAINSOLENOIDVALVESfOTthEf iSt 15+20seconds. @ ct) CE o ct) i = t! ct) |rl CE ELECTR. TIMER É, uJ o= E o Él = Ét CE o v) ú) Rx Tx '*=3 s =- o3 CE CL PUMP WATER lrl CE o- = C' (J ELECTR()NIC CARD -- Page'11 NOTE.lf in the 5 minutes length of the water filling phase the machine sump reservoir does not get filled with water up to the rim of the overtlowpipe, it is advisable to check: 1. The water pressure of the water supply line that must be at least 1 bar (14 psig) Minimum (Max 5 ban70 psig). 2. The filtering device installed in the water line that may reduce the water pressure below the Minimum value of 1 bar (14 psig). 3. Any clogging situation in the water circuit like the inlet water strainer and/or the flow control. E. At completion of the waterfillingphase (5minutes) theunitpassesautomatically intothe freezing cyclewiththestartup of: COMPRESSOR WATERPUMPS FANMOTOR(inair cooledversion)controlled by the condensing temperature sensorlocated withinthecondenser fins(Fig.2). OPERATIONAL CHECKS F. Install, if necessary, therefrigerant service gaugeson both the high side and low side Schràder valvesto checkthecompressor head andsuctionpressures. NOTE.Onair cooledmodels,thecondenser temperaturesensor,whichis locatedwithin the condenser fins, keep the head bondensino)pressurebetvveen15 and 16 bars (210-225psig). ln the water cooled models the discharge pressure is kept constantatthe valueóf t 6 bars225 psid bv meansof the waterreoulatinoùatve'loóàted on the watersupplvÌ'ne to íhe condenser. ln caseofcondehèeTcloooino suchtoprevent theproperflowof thecoUinóairor.fànmotor perature out'of operation, the condeóser te'm risesand whenit reaches7îC (17CF)the condensertemperaturesensorshuts-offthe icemakerwiththeconseauent liaht-upof the REDWARN//NG LTGHT iris.ql The same happen even for the water cooled versionwhere the condenserprobe is placed in contact with the refriaerànt liouid line. When its temperaturereaóhes 7f Ò (17e F) it trips-off automaticallv the machine. Afte:rhaving diagnosedihe reason of the rise of temperature and removed its cause, it is necessarv to turn the head of the selector alwavs úsino an appropriate scewdriver first ón the ÈE-SE/ iosítion then return it on previous OPERATION position, thus to put the machine in condition to initiate a new freezing cycle. The same can also be done by just switching OFF and ON the unit at main line switch. ln both cases the machine restarts with the usualS minuteswaterfillingphase in orderto provide enough water into the sump tank. @ Uooóo v) E o u) z, ttl ct) |rI G = ELECTR. TIMER k E lr,l o= É, 'xÍao Él = Ét E o é Rx Tx +o w =- o3 G o- FANMOTOR WATER PUMP at) ct) E CL = o CJ ELECTR()NIC CARD t Page12 G. Check to see through the ice discharge opening that the self propelledspray bar is correctlyrotatingand that the water jets evenly reachthe interiorof the invertedmoldcups,also make sure that there is not excessive water spillingout throughthe opening. H. The icemakingprocesstakesplacethereby, with the water sprayedinto the moldsthat gets graduallyrefrigeratedby the heatexchangewith the refrigerantflowing into the evaporator serpentine. Duringthef reezingprocess,whentheevaporator ITE lotWoo u)E or: - ?lt 7 u - coND =f, - AMBIE E o- Fru = R x T x At€ +Cr H()TGASVALVE ELECTR. TIMER CE o '*f8 w=E É, IL É WATER PUMP G' an (A lrl É, È = o ELECTRONIC CARD CJ @ looóo v) E o u) é t = llJ CA tll c0 E ELECTR. TIMER É, UI o= É, o '*=,8 rlt z, Rx Tx E rF:O +O e =- ou G CL CE o v) rt) trr E o= c, CJ <_EhEcTR0Nrc ( Page13 fallsbelowan established value, temperature the evaporator temperature sensorsuppliesa lowvoltagepowersignaltotheelectronic control in orderto activatean device(P.C.BOARD) electronic timer.Thisonetakesoverthecontrol ofthefreezing cycleuptothecomplete formation of the icecubes(Fig.a). NOTE.Thelength of the entirefreezingcycle is governed by the evaporator temperature sensor which has itsprobe placed in contact with the evaporator serpentine (Non adjustable) in combination with the electronic timer (Adjustable) incorporated in the P.C.BOARD. The timer adjustment is factory set in consideration of the cooling version and of the ice cube size (Small, Medium, Large). It is possible, however, to modify the timed length of the freezing cycle, by changing the DIP SWITCH keys setting. In Tab\e B of PRINCIPLE OF OPERATION are shown the varioustime extensionsof the freezing cycle second phase, in relation with the different DIP SWITCH keys settings. f. After about 17-20 minutes from the beginningof the freezingcycle,in an hypothetic ambienttemperatureof 21"C,the defrostcycle takes placewith the hot gas and the water inlet valvesbeingsimoultaneously activated(Fig.5). The electricalcomponents in operationare: COMPRESSOR WATER PUMPS WATER INLETSOLENOIDVALVES HOT GAS VALVES WATERDRAINSOLENOIDVALVESforthefirst 15-20 seconds. NOTE. The length of the defrost cycle is determinedby the DIP SWITCHkeys setting in conjunctionwith the ambienttemperature sensor located justin front of the condenser. The length of defrost cycle can be adjusted by changing the combinationsetting of keys 5,6 and 7 of DIP SWITCH as illustrated on Table C of PRINCIPLE OF OPERATION. As shown, per each individual keys combination,it is possible to have a different length of the defrost cycle in relation to the different ambient temperature situations; shorter when the ambient temperature is high and longerin colderambientstopartially compensatethe length of the freezingcycle, whichis longerin high ambienttemperatures and shorter in low ones. J. Check,during the defrostcycle, that the incomingwaterflowscorrectlyintosumpreservoir in orderto refillit and that the surplusoverflows throughthe overflowdraintube. K. Checkthetextureof icecubesjustreleased. They haveto be in the rightshapewith a small depressionof about5-6 mm in theircrown. lf not,waitfor thecompletionof thesecondcycle beforeperformingany adjustment. @ 5ooóo q) É o u) z trr (t) trr !c - coN E . AMB = ltl CL c, ..x=a tlr = Él CE o ?t) ct) |rI CE o= o (J ELECTR. TIMER É, = Rx # C()NTACT()R C()IL te = - c t3 CE o- FAN TOR WATER PUMP Page14 lf required, thelengthofthetimedfreezing cycle canbe modified by changing the DIPSWITCH keys settingas illustrated in OPERATING PRINCIPLE. lf the ice cubesare shallowand cloudy,it is possible thatthe ice makerrunsshortof water duringthefreezing cyclesecondphaseor, the qualityof thesupplied waterrequires theuseof an appropriate waterfilteror conditioner or the installation of the optional waterdrainvalvekit KWD. L. To be sureof the correctoperationof ice placeonehandbetween levelcontroldevice, its sensing"eyes"to interrupt thelightbeam. The RED LIGHTlocatedin the front of the goesimmediately P.C.BOARD OFF,and after 60seconds, theunitstopswiththesimultaneous glowingof the2nd YELLOWLIGHTto monitor (Fig.6). theBINFULLsituation Take the handout from the ice levelcontrol sensorsto allowthe resumption of the light beam;theREDLIGHT,located inthefrontofthe P.C.BOARD, willglowimmediately. Afterapproximately 6 secondsthe ice maker resumeitsoperation glowing withtheimmediate oftheFOURTHYELLOWLIGHTindicatinoUNIT lN OPERATION and the extinouishino of the ..BIN FULL''YELLOWLIGHT. NOTE. The ICE LEVEL CONTROL (NFRARED SYSTEM)is independentfrom the temperaturehowever, the reliabilityof its detection can be affected by external light radiations or by any sort of dirt and scale sediment which may deposit directly on the light source and on the receiver. To prevent any possible ice maker malfunction,due to negative affection of the light detector, it is advisable to locate the unit where it is not reached by any direct light beamorlightradiation,also itisrecommended to keep the bin door constantlyclosed and to follow the instructions for the periodical cleaning of the light sensor elements as detailed in the MAINTENANCE AND CLEANING PROCEDURES. M. Removethe refrigerant servicegaugesif fittedandre-fittheunitsevicepanelspreviously removed. N. Instructthe owner/useron the general operationof the ice machineand aboutthe cleaning andcareit requires. @ oóooo v) É cl v) = l&l rt) trl E É ul o= ELECTR. TIMER AMB E o trl z, Ét É, o v) u) ul E o- = o CJ a?? Rx Tx +G oÈg -o CE CL WATER PUMP Page15 PRINCIPLE OF OPERATION How it works W h e n t h e t e m p e r a t u r eo f t h e e v a p o r a t o r serpentinedropsto a pre-setvalue, theevaporator sensor probe changesits electricalresistance allowinga lowvoltagecurrent(B-10volts)to flow to the P.C. BOARDwhich in turn activatesan electronictimer. The timer,which is builtin the P.C. BOARD, takes over, from the evaporator temperature sensor,the controlof the freezingcycleup to its completion. IntheSCOTSMAN Modular CuberMC1210the waterusedto maketheiceis keptconstantly in circulation by fourelectric waterpumps(onefor eachevaporator)which primesit to thenozzles of the selfpropeller spraybar fromwhereit is divertedinto the invertedmold cuos of the (Fig.B). evaporator A smallquantityofthesprayedwaterfreezesinto ice; the rest of it cascadesby gravityinto the sumpassembly belowfor recirculation. FREEZING CYCLE(Fig.A) Thehotrefrigerant gasdischarged outfromthe compressor reaches thecondenserwhere, being cooleddown,condenses intoliquid.Flowing into the liquidlineit passesthroughthe drierfilter, thenitgoesallthewaythrough thecapillary tube where,due to the heatexchanging action,it loosessomeofitsheatcontentsothatitsoressure andtemperature areloweredas well. Nextthe refrigerant entersintothe evaporator (whichhas a largerl.D. then the serpentine capillary) and startsto boiloff;this reactionis emphasizedby the heat transferredby the sprayedwater. The refrigerant then increases in volumeand changesentirelyintovapor. The refrigerant vaporthenpassesthroughthe (usedto preventthatany suctionaccumulator smallamountof liquidrefrigerant mayreachthe compressor) andthrough thesuction line.Inboth theaccumulatorandthe lineitexchanges suction heatwiththerefrigerant flowingintothecapillary tube (warmer),beforeto be suckedin the compressorand to be recirculated as high pressure, hightemperature gas. Thefreezing cycleiscontrolled bytheevaporator temperature sensor(whichhasitsprobeincontact withtheevaporator serpentine) thatdetermines thelengthof thecyclefirstportion. rr ATTENTION. In case, after 15 minutes from the beginningof the freezingcycle, thetemperature of theevaporator sensor probeis higherthen0"C(32'F)(shortage of refrigerant,inoperativehot gas valve, e t c . ) t h e P . C . B O A R Ds w i t c h O F F immediately the unit with the simultaneuosblinkingof the WARNING REDLED. Thelengthof thissecondportionof thefreezing cycleis pre-fixed andrelated to thesettingofthe firstfour DIP SWITCHkeyswhichis madein relation withthedifferent unitversions. InTableB areindicated thevarious lengths ofthe secondportionof freezing cycle(Timemode)in relation to thedifferent combinations of the DIP SWITCHKEYS. In TableA herebelow are illustrated the DIP SWITCHkeyscombinations forthedifferent unit versions as theyareset in thefactory. DIP SWITCHKEYS FACTORYSETTINGCOMBINATIONS D|PSW|TCH ON M C L1 2 1 0 1 I 2 I 3 5 T I T I 7 6 I I ON OFF 4 T OFF M C M1 2 1 0 NOTE. Thechange of the electricpotentialof the evaporator sensor with the consequent activationof the timer (Timemode) is signalled by the glowing-upof the RED LED located in the front of the P.c. BoARD. I I T I 10 I I I T I I I I T Page16 @ 9IIHIIIUBE lfd'o' tff ill rff fll @ $$uor t#ro* 000 000 000 000 Page 17 The electrical components in operation during thefreezing cycleare: COMPRESSOR FANMOTOR(inaircooledversion) WATERPUMPS CONTACTOR COIL andduringthe secondphaseof freezingcycle (Timemode)theyarejoinedby the ELECTRONIC TIMER The refrigerant headpressure, in thecourseof the freezingcycle,rangesbetween15 and 16 psig)beingcontrolled bars(210-225 bythetemperaturesensor probe locatedwithin the condenser fins(aircooledversion) or, it is kept constant at 16 bars(225psig)by meansof the waterregulating valve(watercooledversion). Ontheaircooledversion, thecondenser temperaturesensor,when sensesa risingof the condensertemperature beyondthe pre{ixed limit,changesitselectrical resistance andsend a lowvoltagepowerflowto the MicroProcessor of P.C.BOARDwhichinturnenergizes, through a TRIAC,theFANMOTOR. Whenthe oppositesituationoccures,i.e. the getsbelowthepreJixed condenser temperature limit,thetemperature sensorchangesagainits electrical resistance reducing therefore thecurrent flowto the P.C.BOARDto causethefanmotor to temporary cut-off. At the startof the freezingcyclethe refrigerant suction or lo-pressure lowersrapidly to 3,3bars- inrelation gradually 45psigthenitdeclines with - to reach,atthe thegrowing of theicethickness endof thecycle,approx.1 bar-l4 psig withthe cubesfullyformedin thecupmolds. Thetotallengthofthefreezing cyclerangesfrom 20lo 25 minutes. DEFROST OR HARVEST CYCLE(Fig.C) As the electronic timerhascarriedthe system throughout thesecondphaseof freezingcycle, thedefrostcyclestarts. ATTENTION. In case the unit be able to reach0"C(32"F)evaporatingtemperature within 15 minutes,but after 45 minutes fromthe beginningof thef reezingcycleit has not yet reachedthe evaporatortemperatureof -15"C(5'F)the machinegoes straightintothedefrostcycleomittingthe timed portion of the freezingcycle relied to the setting of the first four DIP SWITCHES. NOTE.Thelengthof thedefrostcycleis predetermined bythesettingoftheDIPSWITCH KEYSNO. 5, 6 and 7 and it is reliedas well to the ambienttemperatureas detailedin TableC. NOTE.ln case the condensertemperature probesen sesthat the condenser temperature has rised to 7fC ft7eF) for one of the followingabnormalreasons: CLOGGED CONDENSER(Air cooled version) FAN MOTOR OUT OF OPERATION(Air cooled version) INSUFFICIENTFLOW OF COOLING WATER(Watercooledversion) AMB IENTTEMPERATURE HIGHER THEN The electrical in operation components during thisphaseare: COMPRESSOR WATERPUMPS WATERINLETSOLENOID VALVES HOTGASSOLENOID VALVES WATERDRAINSOLENOID VALVESforthefirst 15-20 seconds. it causesthetotalandimmediateSHUT-OFF of the machinein order to preventthe unit fromoperatingin abnormaland dangerous conditions. Whentheice makerstopson accountof this protectivedevice,there is a simultaneous glowingof theREDLED,warningtheuserof the Hi Temperaturesituation. After having eliminatedthe source of the condenserhilemperature, to restart the machineit is necessaryfirst,to rotatefor a while the program selector on RE-SET position then, to rotate it again on position. OPERATION Thesamecanbe donebyjustswitchingOFF and ON the unitat mainline switch. Theicemachineresumesitsnormaloperation by going throughthe 5 minuteswaterfilling phase. Theincoming water,passingthroughthewater inletvalveand the flowcontrol,runsoverthe evaporatorplatenand then flows by gravity throughthe dribblerholesdownintothe sump/ (Fig.D). reservoir Thewaterfillingthesump/reservoir forcespartof the surpluswaterfrom the previousfreezing cycleto go outto thewastethroughtheoverflow pipe.Thisoverflowlimitsthe levelof the sump waterwhichwill be usedto producethe next batchof icecubes. Meanwhile, thehighpressure, hightemperature refrigerant, fromthecompressor, discharged flows throughthe hot gas valve directlyinto the evaporator serpentine by-passing thecondenser. Thehotgascirculating intotheserpentine of the evaporator warmsupthecoppermoldscausing the defrostof the ice cubes.The ice cubes, released fromthe cups,dropby gravityontoa slantedcube chute,then througha curtained openingtheyfallintothestoragebin. 4ec 00eF) Page18 ';;t,';à;'iàry NOTE.Thetengthof thedefrostcycl?,factgry, ín a"cordancewnh tt19t ?9tu:lt (asshownonTableC)' à"mOilntiò,íperature For instance,in high ambienttemperature it canbe redugedtopcoyel s-o119 situation, of thetimespentfor thelongertreezngcycte' hot,gas At theendof thedefrostcycle,both.the machine the so ólose, valves ;iài-d;àt"iinlet anotherfreezingcycle' iÀitiates Electronic Controls & Sensors """' EvaporatorSensor CondenserSensor AmbientSensor lce LevelControl At the startof thefreezingcycle,the evaporator resensorcontólsihelengthof thefirst temperatu a òàri ót the freezingcycle' As it reacnes low a it slpplies 5ilà"ìàttii'eo-tèmp"erature, to i;Eé; il;iént io the P'c' BoARDin.order over takes which, timer electronic the aótiuàte -f tne tieezing cvcle-fqr.a pre ixed i#' ;.tòi;i tòtneDlÈswlrcHkevssettins iiri",àóóór.oins (seeTab.B). 'ilréli,r"óiory NOTE. The evaporator temp.eratu.re is thesamefo.ratt.the pre-ée1, in thefietd' adiustabte ,óiàéiiàra ís'not cycle2rdphase the freezing. Oncecompleted jnto ìÉe-;y;óti gòès automaticailv the.defrost à".rÀîr'ictràlsohasa pre-fixédlengththatcan ng'upon the-actual ambient rfiòiirv""Jiv oàÈenoi c' - - -^, showriinTable ad ieiìpeíatuie cvcletheP'C'BOARD Xi;ffiftìiln ottheoetrost ;;ffi'fid;]rré uni to startàgaina newrreezing cycle. . ELECTRICAL SEQUENCE OPERATION The followingchartsillustratewhich-switches areONor OFFduringa ànOwnicncohponents cycle' icemaking the of óàrtiòrtàipnasb reference' a for diagram wiring tÉe to hétet as iiél"btoii tÈéwÍringóiagramshowstheunit Cycle' Freeze Timed it is in the a a a a TIMED FREEZE Electricalcomponents(Loads)""" . CONTROL SEQUENCE OPERATION ON OFF Compressor FanMotor(Aircooledonly)andTRIAC HotGasValves lnletWaterValves Relay1 Coil""""""""""" P.C.Board 2 & 3 Coil RelaY P.C.Board WaterPumps Coil'............' Contactor Timer...'.'...'. Elecîronic ElectronicControls& Sensors"""' Sensor EvaporaÎor Sensor Condenser Sensor Ambient lce LevelControl ON OFF a a r a a a a a a a a ON OFF a a a a HARVEST FREEZE BEGINNING ON OFF Electricalcomponents(Loads)""" a Compressor FanMotor(Aircooledonly)andTRIAC a HotGasValves a lnletWaterValves a RelaY1 & 2 Coil P.C.Board a Relay3 Coil""""""""""" P.C.Board (Loads)""" components Electrical ComPressor WaterPumPs Coil'....'.'...." Contactor Timer.'..'...... Electronic Fan Motor(Aircooledonly)andTRIAC ON OFF ' ' ili:,î?:,::,):,ì"; Relay1 Coil""""""""""" P.C.Board P . C . B o aR r de l a Y 2 & 3 C o i l WaterPumPs Coil......."""' Contactor Timer..........' Electronic : ' ' ElectronicControls& Sensors"""' Sensor Evaporator Sensor Condenser AmbientSensor lce LevelControl a a a ON OFF a a a a Page19 -*VI I Lr OPERATING CHARACTERISTICS On air cooledmodelsduringthe freezingcycle pressure is keptbetween15 and thedischarge psig)bythecondenser tempe16 bars(210+225 raturesensorandat the sametimethe suction pressure reaching itslowest willgradually decline, pointjust beforeharvest.Compressor amps a similardrop. experience On water cooled,the dischargepressureis maintained duringthefreezecycleby constant, valveat 16bars(225psig). thewaterregulating andcompressor amps However, suctionpressure freezesice. willstilldeclineas themachine Freeze Cycle AverageDischarge 15-16 bars (210+225psig) PressurefuC: AverageDischarge Pressure WC: 16 bars (225 psig) End SuctionPressure FreezeCycle: 1.5bar (21 psig) DESCRIPTION COMPONENTS A. EVAPORATORTEMPERATURE SENSOR sensorprobe, The evaporatortemperature ne, serpenti locatedincontactwiththeevaporator temperadetectsthedroppingof theevaporator tureduringthe freezingcycleandsignalsit by flowtothemicroprocessor of supplying a current P.C.BOARD. theevaporator According to thecurrentreceived, powerto the P.C.BOARDfirst, sensorsupplies whenitreachs 0'G(32oF), secondat-15"C(5'F); inthissecondcaseitsupplypowertotheelectronic timerbuiltintothe P.C.BOARDso thatit may takecontrolof the lengthof the 2nd phaseof freezing cycle. bythe Thelengthof thetimedphaseis pre-fixed settingof the keys 1, 2, 3 and 4 of the DIP SWITCH. timer (-15"C The activationof the electronic - 5'F) is monitored up of theRED by thelighting LEDolacedin thefrontof the P.C.BOARD. inthemidperiod Thislighting usually upoccures of the freezingcycleand signalsthe switching fromthefirstto thesecondphaseof thefreezing cycle. ,o.E:l o tl.rHarvest Cycle B. CONDENSERTEMPERATURESENSOR Average Discharge 7+14bars ('100-195psig) Pressure: resensorprobe,located Thecondenser temperatu fins(aircooledversion) or withinthecondenser version) incontactwith thetubecoil(watercooled variations temoerature detectsthe condenser current,at low and signalsthemby supplying voltage, to the P.C.BOARD. In the air cooledversions,in relationto the of currentreceived, themicroprocessor different the supplies, through aTRIAC, theP.C.BOARD powerat highvoltageto thefan motorso to cool andto reduceitstemperature. thecondenser risesand temperature In casethe condenser 75'C (170"F)thecurrentarriving to the reaches is suchto causean immediate microprocessor operation. andtotalstopof themachine AverageSuction Pressure: psig) 4+7bars(55+100 REFRIGERANTCHARGESUVA HP 81 Air & WaterCooledVersion (70oz) ir. trpooo srams ! I Íiv NOTE.Beforechargingthe refrigerantsystem always check the type of refrigerant and quantity as specified on the individual ice machinedataplate. Therefrigerantchargesindicatedarerelated to averageoperatingconditions. As SUVAHP 81 iS A bIANdOf WARNING. differenttypesof refrigerantsit is imperative to chargethe systemonly in liquid phasein orderto avoidto altertheir mixup percentage. C. AMBIENTTEMPERATURESENSOR Theprobeof thissensor,locatedin thefrontof (Aircooledversion) and theicemakercondenser (Water onthewatersupplylineto thecondenser cooledversion)has the functionto detectthe and, by ambientor the water temperature resistance, supplies a itsownelectrical changing currentflowto the P.C.BOARD. different This differentcurrentflow receivedby the iselaborated bythemicroprocessor P.C.BOARD, in orderto extendor shortenthe defrostcycle shofier situations, length(longerincoldambient in warmones). Page 20 D. ICEBINLEVELLIGHTCONTROL Theelectronic icebinlevelcontrol,locatedinto the storagebin, has the functionto stop the operation oftheicemachine whenthelightbeam betweenthe light sourceand the sensoris interrupted by theicecubesstoredintothebin. Whenthelightbeamis interrupted theREDLED locatedinthefrontof theP.c. BoARDgoesoff; in casethe lightbeamis constantly interrupted formorethan60seconds, theicemachine stops withtheglowing-up of the2ndYELLow LEDto monitorthesituation of icebinfull. The 60 secondsof delaypreventthat an ice scoopmovement ortheicedropping through the icechute(interrupting fora whilethelightbeam) canstoptheoperation of theunit. As soon as the ice is scoopedout (withthe resumption of the lightbeambetweenthe two infrared sensorof icelevelcontrol) theREDLED is lighted upandafter6 seconds theicemachine restarts againwiththe extinguishing of the2nd YELLOWLED. E. P.C.BOARD(Dataprocessor) TheP.C.BOARD,fittedin itsplasticboxlocated inthefrontof theunit,consists of twoseparated printedcircuitsoneat highandtheotherat low voltageintegratedwith a programselector,of five alignedLEDSmonitoring the operation of themachine, oftwoextramonitoring REDLEDS, of one DIP SWITCHwith ten keys,of input terminals fortheleadsof thesensorprobesand inputandoutputterminals fortheleadsoftheice makerelectrical wires. TheP.C.BOARDis thebrainof thesystemand it elaborates, throughits microprocessor, the signalsreceived fromthefoursensors inorderto controlthe operationof the differentelectrical componentsof theicemaker(compressor, water pump,solenoid valves,etc.). By turningtheprogramselector it is possible to putthe unitin thefollowing different situations: CLEANING/RINSING. The waterpumpis the only electricalcomponentin operationand it mustbe usedduringthecleaning or the rinsing procedure of thewatersystemof icemachine. STANDBY. The unit remainunderelectrical powerbutOUTofoperation. ltcanbeusedbythe serviceengineer in orderto stoptheunitduring theserviceandinspection operations. lN OPERATION. Theunitis running through the freezing anddefrostcyclesstopping automatically onlyat fullbinsituation. RE-SET/HITEMPERATURE. To be selected to resumethe unitoperation whenthe ice maker shutsoffdueto theintervention of thecondenser temperature sensor(toohighcondensing tempe-. rature). ThefiveLEDS,placedin a rowin thefrontof the P.C.BOARD,monitorthefollowing situations: GREENLIGHT Unitunderelectrical power YELLOWLIGHT Unitshut-offat full storagebin REDLIGHT Unitshut-off dueto hi condensing temperatu re *il' blinking Unitshut-off dueto too hi evaporating temperature YELLOWLIGHT Unitin freezing operation YELLOWLIGHT Unitin cleaning/rinsing mode F. DIPSWITCH The P.C.BOARD which controlsthe entire operationof the ice maker,hasa DIPSWITCH with ten switching keys whichallowto set up programinordertoextendor themicroprocessor to shortenthe lengthof freezingand defrost cyclesin relationto the differentmodelsand versions of icemachines. -l Page 21 cycle (controlledby the electronictimer) as detailedin table B. The DIP SWITCHfirst four keys setting determines thelength ofthe2ndphaseoffreezing I@ LENGHTOF TIMEDPORTIONOF FREEZINGCYCLEACCORDINGLYTO THE DIP SWITCHSETTINGCOMBINATIONS 1 2 3 4 2 3 4 I I I v,' r f I , v,, r 2 v,t -a v,t AC I ' I I I I I I I E - A 7t - ' v,. ^ È A v'. r È 2? min o rlr r:hiF r I I I I v.r I r f -eri^ 13 min The DIP SWITCHkeys 5, 6 and 7 setting determines the lengthof the defrostcycle vilr.. --: r /mrn. r r Smin. r r r 3min. r r r 1inin. O F F T - 1 2 # r <6 r r I I r r 1 1 O N OFF lQmi^ I I c"F I - I f q I r I t6óió I # T r to theambient according temperature sensoras specified in tableC. LENGHTOF DEFROSTCYCLE(tN SEC.)ACCORDTNG TO THE AMBIENTTEMPERATUREAND TO THE DIP SWITCHSETTINGCOMBINATIONS 7 | 0+5'C 5+10"C 10+15"C 15+20'C 2O+25"C25+30'C 30+35"C 3b+40"C ON OFF 180' 150' 120' of{ OFF 150' 120' 120' 120' 90' 90. ON OFF 180' 150' 150' 120' 120' 90. ON OFF 180' 150' 150" 120' 120' 120' 210 180' 180" 150" 150. 150. The8th DIPSWITCHkeyallowsto makea rapid checkupoftheP.C.BOARDoutputconnections (compressor, waterpump,fanmotor,waterinlet andhotgassolenoid valves)energizing themin (2 seconds) rapidsequence oneby one. DURINGTHE AUTOMATIC OPERATION OF THE ICE MAKERTHIS KEY MUSTBE SET IN OFFPOSITION. A T T E N T I O NT. h e c h e c k u p o f t h e P.C.BOARD outputmustbe peÉormedin a veryshorttimeinordertoavoidfrequent start and stop (everyfew seconds)of the electricalcomponentswhichmaydamage them,especiallythe compressor. o The 9th key allowsthe operationof the water pumpevenduringthedefrostcycle,as required intheunitequipped by therotating spraybar,to accelerate the releaseof the icecubes. The 1Othkey is notusedontheModular Cuber M C1 2 1 0 . G. WATERSPRAYBAR(4 per unit) On ModularCuberthespraybaris selfrotating beingpropelled by a streamof waterpassing throughan holelocatedin onearmof thespray bar and,throughits four nozzles, the pumped wateris sprayedin each individual cup to be frozenintoice. H. WATERPUMP(4 per unit) Thewaterpumpoperates continually throughout thefreezing anddefrostcycleto primethewater fromthe sumpto the selfpropelling spraybar it spraysit and,throughthefourspraynozzles, into the invertedcup moldsto be frozeninto crystalclearicecubes. Thewaterpumpremains inoperation evenduring thedefrostcycleinorderto helptherelease ofthe icecubes. It isrecommended thatthepumpmotorbearings be checkedat leasteverysixmonths. Page 22 I. WATERINLETSOLENOID VALVE. 3/4 MALEFITTING(2 per unit) Thewaterinletsolenoid valveisactivated bythe microprocessor of the P.C.BOARDdurinfthe first5 ininutes of waterfillingphaseandas-well duringthedefrostcycle. Whenenergized it allowsa meteredamountof incoming watertoflowovertheevaporator cavity to assistthehotgasindefrosting theicecubes. The waterrunningover the evaporatorcavity dropsbygravity, through thedribbier holesofthe platen,intothe sumpreservoir whereit will be suckedby the waterpumpand primedto the spraysystem. J. FANMOTOR(Air cooledversion) The fan motoris controlled throughthe P.C. BOARDandtheTRIACby thecondenser temperature sensor. Normally itoperates onlyduring thefreezing cycletodrawcooling airthrough the fins. condenser In thesecondpartof thefreezing cycle,thefan motorcanrunat intermittance asthecondenser pressure must be kept between two corresponding head pressurevalues(15+16 psig). bars-210+-225 L. M. WATERREGULATING VALVE (Watercooledversion) This valvecontrolsthe headpressurein the refrigerant systembyregulating theflowofwater goingto thecondenser. As pressure increases, thewaterregulating valve opensto increasethe flowof coolingwater. HOTGASSOLENOID VALVE(2perunit) Thehotgassolenoid valveconsists basically in two parts:thevalvebodyandthe valvecoil. Locatedon thehotgasline,thisvalve isenergized throughthe microprocessor of P.C. BOARD duringthe defrostcycleandas wellduringthe waterfillingphase. Duringthedefrostcyclethehotgasvalvecoilis activated so to attractthehotgasvalvepistonin orderto givewayto thehotgasdischarged from thecompressor toflowdirectly intotheevaporator serpentine to defrosttheformedicecubes. K. retrievethe refrigerantthroughoutthe ertie system. lt compressesthe low pressure refrigerant vaporcausingitstemperature to rise and becomehighpressurehot vaporwhicfrb thenreleased throughthedischarge valve. COMPRESSOR The hermeticcompressor is the heartof the refrigerant systemandit is usedto circulate and N. CONTACTOR Placedoutsideof thecontrolboxit is controlled bytheP.C.BOARDinorderto closeor openthe electrical circuitto thecompressor. O. WATERDRAINSOLENOID VALVE Energized by a specialelectronic timerduring thefirst15-20seconds of defrostcycle,itdiverts tothedrain (fromthesumptank)alltheremaining water-richof minerals-left from the previous freezing cycle,whichispumped outbythewater pump. P. WATERDRAINELECTRONIC TIMER Locatedbesidethe contactor,it energizesthe waterdrainvalvefor thefirst15-20secondsof the defrostcycleaccordingto the settingof its knob. NOTE.Adjust the knob of the waterdrain electronictimer in order that all remaining waterof previousfreezingcyclebe pumped out fromthesumptank. Page 23 ADJUSTMENT, REMOVAL AND REPLACEMENT PROCEDURES ) A. ADJUSTMENT OFTHECUBESIZE CAUTION.Before performing actual adjustmentof the cubesize, checkother possiblecausesfor cubesizeproblems, referto the ServiceDiagnosisSectionfor problemreviewand analysis. Do not performany adjustmenttill the icemakingsystem has progressed through severalcompletefreeiing and harvestcycles,to observesizeandquality of ice cubesandwhetheror not the cubé size problemexists. SMALL IDENTATION o l. lf thecubesareshallow size(lndentation is too deep)probablythe lengthof the second phaseof the freezingcycleis too shortso, to extendsuchlengthyouhaveto: NORMAL SIZE-SHAPE 1. LocatetheDIPswlTcH on thefrontof the P.C.Board. 2. Takenoteofthecombination ofthefirstfour DIPSWITCH KEYSandcheckthe corrisponding lengthof freezing cycle2ndphaseon TableB. 3. Changethe same DIP SWITCHKEYS settingsothatitwillcorrespond tothecombination ontableB preceding theoneremarked atstep2. Thiswillallowanextension of thefreezing cycle of two moreminutes. LITTLEOR NO I C EI N C E N T E R OF CUBES SHALLOWSIZE a t 4. Observethe ice cubes in the next two harvestsand eventuallyrepeatsteps2 and 3 aboveuntilproperice cubessizeis achieved. Seefigure. (lndentation ll. lf thecubesareoversize istoo full)probably the lengthof thesecondphaseof thefreezing cycleis toolong. To shortensuchlengthyouhaveto: 1. LocatetheDIPswlTcH onthefrontof the P.C.Board. 2. Takenoteofthecombination ofthefirstfour DIPSWITCH KEYSandcheckthe corrisponding lengthof freezing cycle2ndphaseon TableB. 3. Changethe same DIP SWITCHKEYS settingsothatitwillcorrespond tothecombination on tableB comingnextto the one remarked at steo2. Thiswillreducethefreezing cyclelengthof two mrnules. *==: THICKBULGE SOLIDICE OVER SIZE 4. Observethe ice cubesin the next two harvestsand eventuallyrepeatsteps2 and 3 aboveuntilproperice cubessizeis achieved. Seefigure. Page 24 B. REPLACEMENTOFEVAPORATOR SENSOR TEMPERATURE REPLACEMENTOF ICE LEVEL LIGHTCONTROL E. 1. Removethe front centerupperpaneland 1. Removefrontcenterupperandlowerpanels front left or right panel accordingto the location andas wellthetopone. of the ice levelcontrol. fromthesuctionline theinsulation 2. Remove thesensorprobefromitsholder. andwithdraw plug sensorterminal 3. Tracetheevaporator on the rearsideof thecontrolboxand removeit pulling outtheterminal fromitssocketbycarefully plugsecuring clip. 2. Trace the ice level light controlterminal pluq(theonlyone withfourterminalpins)on the 'reai diOeof tÉecontrolbox and removeit f rom its socketby carefullypullingout the terminalplug securingclip. Removethe ice chutewhereis locatedthe 3. ice level lightcontrolassy and removeit from its 4. Toinstallthereplacementevaporatorsensor metal braóketby unloosingthe two securing reverse. followtheabovestepsin screws. C. REPLACEMENTOFCONDENSER SENSOR TEMPERATURE 1. frontcenterupperandlowerpanels. Remove sensorprobelocated 2. Tracethecondenser finson air cooledversion withinthe condenser andwithtrowit. the itbyopening versionremove Onwatercooled plasticstrap(reusable) theprobeto the securing liquidline. refrigerant sensorterminalplug 3. Tracethe condenser on therearsideof thecontrolboxandremoveit fromitssocketbycarefullypullingouttheterminal plugsecuring clip. sensor replacement condenser 4. Toinstallthe followtheabovestepsin reverse. OF AMBIENT D. REPLACEMENT SENSOR TEMPERATURE 4. Remove the PVC plastic plug from unit base then withdrawthe entire ice level light controlcableand terminalplugthroughthe hole in the unitbase. 5. To installthe replacementice level light controlfollowthe above steps in reverse. NOTE. Slip in the ice level control cable in the center of the plastic plug so to avoid any sort of contact with the unit frame. F. OF P.C.BOARD REPLACEMENT 1. Removefrontcenterupperpanel. plugs,located 2. Removeallsensorterminal on the rear side of P.C. Board,by carefully themoutfromtheirsocketsclips. releasing boardconnection theterminal 3. Disconnect oluofromthe rearsideof P.C.BOARDthen Removefrontcenterupperandlowerpanels. thesameto the thefourscrewsholding Lnlóose it. remove plastic box and control sensorprobe,holdedon 2. Tracetheambient fins-on infrontofthecondenser itsmetalbracket P.C.BOARD 4. To installthe replacement its andremoveit byunloosing aircooledversion, reverse. on steps above follow the plasticclamp. securing On watércooledversion,removeit by opening theprobeon securing strap(reusable) theplastic thewatersupplylineto thecondenser. G. REPLACEMENTOFTHEWATERPUMP plugon 3. Tracetheambientsensorterminal therearsideofthecontrolboxandremoveitfrom 1. Removeleftor rightfrontpanels. plug itssocketbycarefullypullingouttheterminal clip. securing 2. Locatethe waterpump in the front left chamber. cornerof theevaPorator ambientsensor 4. To installthe replacement followtheabovestepsin reverse. 3. Removetheplasticicechuteandthrough tracetheplastichose opening theicedischarge fromtheportofthepumpbody. disconnecfit and NOTE.Both the condenserand ambient sensorsare equippedby the sameterminal 4. Unloosethe screwand the yellowgreen oluo andsocket.Toavoidconfusionon their 'insíattation qroundwire.Tracethe pump electricalwire it must be obseruedthat the them. leadsanddisconnect condensersensor terminalplug and its socketare of differentcolour corresponding ú thepump 5. Removethetwoscrewssecuring comparedto the otherones. to sumptank. 1. i Page 25 6. Pulloutthepumpassyfromsump. 7. To installthereplacement pumpfollowthe abovestepsin reverse. H. REPLACEMENT OFWATERINLET SOLENOID VALVE 1. Closetheshut-offvalveonthewatersupply lineanddisconnect itfromthewaterinletfittingat the rearof the modular cuber. 4. Unloosethe screwssecuring the valveto the unitbaseand removeit. 5. To installthe replacement water drain solenoidvalvefollowtheabovesteosin reverse. NOTE. When installing the new valve pay attention to the water flow direction. 2 . R e m o v et h e r e a r c e n t e r p a n e l a n d disconnect theelectrical leadsfromthesolenoid valve. L. 3. Unscrew thetwoscrewssecuring the inlet solenoid valveto thecabinet. REPLACEMENTORTHEWATERDRAIN ELECTRONICTIMER 1. Removethe frontupperand lowerpanels. 4. Remove thecorbinclamps andplastic hose; thevalveis nowfree. 2. Unscrewthe terminalwires holdersof the electronictimerand disconnectthe wires. 5. To installthe reDlacement water inlet solenoidvalvefollowtheiabovestepsin reverse. 3. Remove,by pullingout its holdingring,the electronictimerfrom its bracket. I. TO REMOVE THEFLOWCONTROL 4. To installthe replacementelectronictimer followpreviousstepsin reverse. 1. Removethe rearcenterpanel. plastichoseconnecting 2. Locatethe thewater inletsolenoid valvetothecopperwater linegoing to thetop of the evaporator chamber. 3. Unloosethetwo clamps securing thecopper tubeaswellastheflowcontrolto theplastichose andwithdraw thecoppertube. 4. Bymeansofa4 MAscrewwithdrawthe flow controlassyfromtheinsideof plastichose. o 3. Removethecorbinclampsandtheplastic hosesfromthevalve. J. REPLACEMENTOFTHEHOT GASVALVECOIL 1. Remove thefrontandthetopcenterpanel. 2. Removethehardware securing thehotgas valvecoilto its body. 3. Tracetheelectricwires belonging to thehot gasvalvecoilanddisconnect them;thenliftthe valvecoilfromthevalvebody. NOTE.Adjust the electronictimer knob in order that all remaingwaterfromprevious freezingcyclebetotallypumpedoutfromthe sumptank. M. REPLACEMENTOFFANMOTOR 1. Removethefrontupperandlowerpanels. 2. Unloose thescrewssecuring theaircooled condenser to the unitframeandopenit to gain the accessto thefan motor. 3. Removescrewsandyellowgreenground wire.Tracetheelectricalleadsof fan motorand disconnect them. 4. Removethe boltssecuringthe fan motor protection grid to the condenser shroudthen removethefan motorassembly. 4. Toinstall thereplacement hotgasvalvecoil followpreviousstepsin reverse. 5. Withan appropriate allenwrenchunsoolse thescrewsecuring thefanbladeto thefanmotor shaftthenunloose thenutsholding thefanmotor grid. to itsprotecting K. REPLACEMENT OF WATERDRAIN VALVE SOLENOID 6. To installthereplacement fanmotorfollow the abovestepsin reverse. 1. Removethe rearpanel. 2. Traceand disconnectthe electricalleads fromthewaterdrainsolenoid valvecoil. NOTE. When installinga new fan motor checkthat the fan bladesdo not touchany surtacesand movefreely. I Page26 N. REPLACEMENTOFSPRAYBAR 1. Remove thefrontrightorleftsidepaneland thentheplasticicechute. 2. Reachthrough theiceopening andfeelfor the spraybar. 3. Rotatespraybar so that one of its end is alignedwithiceopening. 4. Grabthespraybarcenterandliftitupoffthe let bearinghub togetherwith its racewasher; thendrawit outthroughtheiceopening. spraybarfollow 5. To installthereplacement abovestepsin reverse. OF DRIER O. REPLACEMENT 1. Removethe upperand lowercenterfront panels. 2. On air cooledversion,ulloosethe screws to unitframe. securing thecondenser from the system 3. Recoverthe refrigerant andtransferit in a bottleso to reclaimor recvcle it. linesfromthetwo 4. Unsolder therefrigerant endsof thedrier. NOTE. Always install a replacement drier whenever the sealed refrigerationsystem is open. Do not replace the drier until all other repairs or replacements have been completed. 4. To installthe replacementhot gas valve body follow the above steps in reverse. NOTE.Thoroughlyevacuatethe systemto after removemoistureandnoncondensables hotgas valvereplacement. O. REPLACEMENTOFEVAPORATOR PLATEN 1. Removetopandrearpanels. 2. Removethe plasticcoverfromthe upper platen. partof the evaporator 3. Recoverthe refrigerantfrom the system andtransferit in a bottleso to reclaimor recvcle it. tube thecapillary 4. Unsolder anddisconnect neofevaporator andhotgaslinefromoneserpenti linefromthe other and the suctiondischarge serpentine. drier remove 5. To installthe reolacement factoryseals and solderthe refrigerantlines to NOTOVERHEAT thedrier takingprecautions body. platenassemblyout of 5. Liftthe evaporator its seat. remove 6. Thoroughlyevacuatethesystemto after drier moistureand non condensable replacement. NOTE.Alwaysinstall a replacementdrier systemis wheneverthesealedrefrigeration open.Do not replacethe drieruntilall other repairs or replacementshave been completed. HP 81 7. Chargethe systemwithrefrigerant andcheck byweight(seedataplateof machine) for leaks. ATTENTION. SUVAHP81 as it is a blend of differenttypeof refrigerantsit hasto be chargedonly in the liquidphase. B. Replacepanelspreviouslyremoved. P. HOTGASVALVE REPLACEMENTOF BODY 6. Toinstallthereplacementevaporatorfollow the above steps in reverse. NOTE.Thoroughlyevacuatethe systemto removemoistureandnoncondensablesafter nt. evaporatorreplaceme OF AIR COOLED R. REPLACEMENT CONDENSER J to remove 1. Followthestepsin procedures thehotgasvalvecoil. 1. Removefront centralupper and lower oaners. 2. Recoverthe refrigerantfrom the system andtransferit in a bottleso to reclaimor recycle it. 2. Removefrom the condenserfins the sensorprobeas wellas theambient condenser sensorprobe. temperature linesfromthe hot the refrigerant 3. Unsolder gasvalvebodyand removeit fromthe unit. 3 . R e m o v e t h e s c r e w s a t t a c h i n gt h e to theunitframe. condenser : . ì u) Page 27 4. Recoverthe refrigerant from the system andtransferit in a bottleso to reclaimor recycle it. the 3. Removecorbinclampanddisconnect waterhosefromthe outletof waterregulating valve. linesfrom the 5. Unsolderthe refrigerant condenser andremoveit fromthe unit. 4 . U n l o o s et h e n u t s e c u r i n gt h e w a t e r regulating valveto theunitframe. NOTE.Always installa replacementdrier wheneverthesealedrefrigeration systemis open.Do not replacethe drieruntilall other repairs or replacements have been completed. replacement condenserfollow 6. Toinstallthe the abovestepsin reverse. NOTE.Thoroughlyevacuatethe systemto removemoistureandnoncondensables after condenserreplacement. S. REPLACEMENTOFWATERCOOLED CONDENSER 1. Removefront centralupperand lower panels. 2. Removethe condenser and the ambient sensorprobesfromcondenser. temperature fromthe system 5. Recoverthe refrigerant it in a bottleso to reclaim andtransfer or recvcle it. valvecapillary 6. Tracethewaterregulating line itsendfromtherefrigerant tubeandunsolder thenremoveit fromtheunit. NOTE.Always installa replacementdrier wheneverthesealedrefrigeration systemis open.Do not replacethedrieruntilall other repairs or replacements have been completed. 7. Toinstallthereplacementevaporatorfollow the above steps in reverse. NOTE.Thoroughlyevacuatethe systemto removemoistureandnoncondensables after waterregulatingvalvereplacement. NOTE. The water flow that passes through the valve can be adjusted by means of the valve setting stem. 3. Removeboltswhichsecurethecondenser to theunitbase. U. REPLACEMENTOFCOMPRESSOR 4. Remove thecorbinclampsanddisconnect condenser. theplastichosesfromthewatercooled 1. Removethe frontcenterupperand lower panelsas wellas therearone. from the system 5. Recoverthe refrigerant andtransferit in a bottleso to reclaimor recycle ir. 2. Unloose thescrewssecuring theaircooled to unit frameand open it to gain condenser compartment. accessto thecompressor linesfrom the 6. Unsolderthe refrigerant condenser andremoveit fromtheunit. 3. Removethe cover and disconnectthe junction electricalleadsfrom the compressor DOX. NOTE.Always install a replacementdrier wheneverthesealedrefrigeration systemis open.Do not replacethe drieruntilallother repairs or replacements have been completed. 7 . To installthe replacement condenserfollow the above steps in reverse. NOTE.Thoroughlyevacuatethe systemto removemoistureandnoncondensables after condenser replacement. T. REPLACEMENT OFWATERREGULATING VALVE (WATERCOOLEDMODELS) 1. Removethe rearcentralpanel. valveonthewatersupply 2 ClosetheshuÈoff it at therearof thecuber. lineanddisconnect fromthe system 4. Recoverthe refrigerant andtransferit in a bottleso to reclaimor recvcle it. anddisconnect boththe suction 5. Unsolder linefromthecompressor. lineandthedischarge 6. Removethefourcompressormountingbolts fromtheunitbase. andthecompressor NOTE.Always install a replacementdrier wheneverthesealedrefrigeration systemis open.Do not replacethe drieruntilallother repairs or replacements have been completed. 7. Toinstallthereplacementcompressorfollow the above steps in reverse. NOTE.Thoroughlyevacuatethe systemto removemoistureandnoncondensables after compressorreplacement. a Page 28 WIRINGDIAGRAM AIRANDWATERCOOLED - 380/50/3+ N 220150-6013 KI rt &ì sSr {J c/ g B - WHITE G - GREY N - BLACK A. BLUE M - BROWN GV - YELLOWGREEN RINSING FREEZER OPER. t a T O O H I G HT E M P E R A T U R E a ffi a lf B I NF U L L /7 POWERON * +;J ru P RESETTOO HIGH i : T E R M I N AB L OARD FREEZINGOPER. STANDBY BINSING t À ; ^ , 3 F I ! ó F E- íU < u J F i + 8 8 È r F L = U , É V . 9 r E é , l ON MC-1210.N' 4WATER PUMP è 5 í U ig E I SENSORS !) < ( U > L ^ z ) À z ) U @ o o F z u PROTECTOR l- -J * ON MC.12'10, N.2 HOT GAS/WATERSOL. VATVES CONNECTIONREPLACESNEUTRAL FOR MODEL 220150.60/3 \ Page 29 DIAGNOSIS SERVICE SYMPTOM POSSIBLECAUSE SUGGESTEDCORRECTION Unitwill not run (No warningLEDSglows) Blownfuse in P.C.Board Replacefuse & checkfor cause of blownfuse lncorrectcontactof fuse in P.C.B. Check grip of the fuse holders Main switchin OFF oosition Turn switchto ON oosition Inoperative P.C.Board ReplaceP.C.Board Looseelectricalconnections Checkwiring/Connector (GreenLED-Power ONglows) P.C.Boardselectorin STANDBY Move to OPERATINGposition (BinfullLEDglows) Inoperativeice levelcontrol Reolaceice levelcontrol (Red-alarm LEDglows) Highhead pressure Dirtycondenser.Clean Inoperativefan motor.Replace Lo power cable in contactwith fram Check and repairor replace (Red-alarmLED blinks) Too high evaporatingtemperature cyclesintermittently Low voltage Compressor Cubestoo small , o Cloudycubes Shortageof water Checkfor shortageof refrigerantor for leakingof hot gas valve Checkcircuitforoverloading Checkvoltageat the supplyto the lf low,contact thepower building. company withburntcontacts Contactor Cleanor replace gasin system Non-condensable Purgethesystem startingdevicewith Compressor Checkfor loosewiresin starting loosewiresdevice Freezing cycletoo short Reviewsettingof DIPSWITCHkeys Capillary tubepartiallyrestricted Recoverrefrig.add new gas & drier, after evacuatingthe system Moisturein thesystem Same as above Shortage of water See remediesfor shortageof water Shortage of refrigerant Checkfor leaks & recharge sensor Inoperative evaporator Replacesensor of water Shortage forshortage of water Seeremedies Dirtywater supply Usewatersoftneror waterfilter Accumulated impurities lce Machine UseSCOTSMAN cleaner Spraybarnotrotating Removespraybar& jet bearing andcleanthem Watersolenoidvalvenotopening Replacevalve Waterleakin sumparea Locateand repair Waterflowcontrolplugged Removeand clean Toolo waterinletoressure mustbe 1 bar Min.waterinletpressure Page 30 DIAGNOSIS SERVICE SYMPTOM POSSIBLE CAUSE lrregular cubessize& somecloudy Some jets plugged SUGGESTED CORRECTION Removespraybar& jet bearing andcleanthem Shortage of water Seeshortageof water Unitnot level Levelas required Spraybar not rotating Removespraybar& jet bearing and clean them Cubes too large Freezingcycle too long Reviewsettingof DIPSWITCHkeys Decreased icecapacity Inefficienîcompressor Replace Leakywater valve Repairor replace gas in system Non-condensable Recoverrefrig.add newgas & drier, after evacuaiingthe sys-tem Poorair circulation Relocatethe unit or orovidefor or excessive hot location(Red-alarmLED glows) more ventilation Poor harvest Unit won't harvest pressure Incorrect discharge Overchargeof refrigerant Correctthe charge.Purgeoff slowly Capillarytube partiallyrestricted Recoverrefrig.add new gas & drier, after evacuatingthe system Hot gas solenoidvalve leaking Reolacevalve Underchargeof refrigerant charge to data plate indication Spray bar not rotating Removespray bar & jet bearing and cleanthem Dischargehead pressuretoo high See incorrectdischargepressure Too short defrosttime Check& adjustDIPSWITCH keys5-6-7 Restriction in incomingwaterline Checkwatervalvestrainerand flow control.lf necessary ' enlargethe flow controlorifice Waterinletvalvenot opening Valvecoilwith openwinding Reolacevalve Hot gas valve orificerestricted Replacehot gas valve assy Air vented holes in mold cuos plugged Cleanout holes Dischargehead pressuretoo low See incorrectdischargepressure Inoperative P.C.Board ReplaceP.C.Board Hot gas valve not opening Valve coil with open winding Replacevalve Water solenoidvalve not opening Valvecoilwith openwinding Reolacevalve Inooerativecondensersensor Reolacesensor InoperativeP.C.Board ReplaceP.C.Board Water regulatingvalve misadjusted Adjust its settingstem Excessive waterin unitbase Watertubingleaking Check.Tighten or replace I Page31 MAINTENANCE ANDCLEANING INSTRUCTIONS A. GENERAL formaintenance Theperiodsandtheprocedures andcleaning aregivenas guidesandarenotto or invariable. be construed as absolute willvarydepending especially, upon Cleaning, localwaterandambientconditions andthe ice mustbe volumeproduced; and,eachicemaker in accordance with its maintened individually, particular requirements. location B. ICEMAKER Thefollowing maintenance shouldbescheduled at leasttwotimesperyearon theseicemakers. 1. Checkandcleanthewaterlinestrainer. is levelled in side 2. Checkthattheicemaker to sideandin frontto reardirections. bin 3. Cleanthe watersystem,evaporators, andspraybarsusinga solution of SCOTSMAN lce Machine Cleaner. Referto procedure C cleaninginstructions and willindicate frequency andproceaftercleaning in localareas. dureto be followed 'o 4. Reachthewaterspraybarfromtheinside liftingit fromits seat of the freezingchambers withits bottomracewasher. Witha pickcleanthe orificeof thewaterstream jet thaîpropellsthe spraybar. NOTE.Cleaningrequirementsvaryaccording to the local water conditionsand individual useroperation.Continuouscheckof theclarity of ice cubes and visual inspectionof the waterspraying partsbeforeandaftercleaning will indicatefrequencyand procedureto be followedin localareas. andfanmotorOFFon 5. Withtheicemachine models, cleancondenser usingvacuum aircooled whiskbroomornonmetallic brushtaking cleaner, and careto do notdamageboththe condenser temperature sensorprobes. ambient 6. Checkforwaterleaksandtightendrainline Pour water down throughthe connections. storagebindrainlineto be surethatdrainlineis openandclear. 7. Checksize,conditionand textureof ice keys adjustment of DIPSWITCH cubes.Perform if required. 8. Checkthe ice levelcontrolsensorto test Putyourhandbetween shut-off. thelightsource andthereceiversoto cutoffthelightbeamforat leastoneminutes. Thisshouldcausetheicemakerto shutoffand of the2ndLED(yellowlight). the light-up IMPORTANT.Pertormthe above check only atthe end of haruestcycle or atthe beginning of freezing cycle in order to do not cause to the unit to make a double freezing cycle. Dipit intoa trayfilledwithcleaning solution then rinseit undera tapwaterstream. NOTE.Withinfewsecondsaftertheremoval of thehandfromthelnfraredsensinglightthe icemakerrestaftsin freezing cycle. Theicelevelcontrolusesdevicesthat sense must be kept clean light, therefore they"see". enoughso theycan Everymonthclean/wipethe sensing"eyes" witha cleansoft cloth. I Page 32 twoorthreelitersof warmwater(45'-50'C)with litersof SCOTSMANlce Machine a 0,2-+0,3 Cleaner. lce Machine TheSCOTSMAN WARNING. Cleanercontains Phosphoric and Hydroxyaceticacids.Thesecompounds are corrosive and may cause burns if swallowed,DO NOT induce vomiting. Givelargeamountsof wateror milk.Call Incaseof external Physicianimmediately. contactflush with water. KEEPOUTOF THEREACHOFCHILDREN leaks. Checkfor refrigerant 9. 4. Scoopoutalltheicecubesstoredintothe b i n i n o r d e rt o p r e v e n t h e m f r o m b e i n g with the cleaningsolutionthen contaminated by flushoutthewaterfromthe sumpreservoir bendingdowntheverticalsumpdrainhose. INSTRUCTIONS OF C. CLEANING WATERSYSTEM rightfrontpanelsto 5. Removethe evaporator 1. Remove left,centerand coverthenslowly gainaccesseitherto the controlboxandto the platenthe cleaning pouronto the evaporator evaporators. Withthe helpof a brushdissolvethe solution. most resistant andremotescaledepositsin the 2. Waittilltheendof defrostcyclethen,with platen. program help normal screwdriver, turn the the ofa Perform thesamefor allthefourevaporators. s e l e c t o rh e a d o n S T A N D B Y p o s i t i o nt o (Fig.7). stop the operation temporarely 6 . S e t t h e p r o g r a m s e l e c t o rh e a d o n CLEANING. freezing the chamber 3. Preparefor each (Fig.8). ina plastic bydiluting container TheSthYELLOWLEDlights-up cleaning solution a Ii : @ loooo u) É, o v) = : b trl u) tll É, ELECTR. TIMER E É, tlt EL G = lrl = ÉÉt É, o o Èca COIL C()NTACTOR ,.,.. aVa x Rx Tx U =- oU É, o- PUMP WATER CA .A EI É, È = G' CJ t Page 33 NOTE.Withthe system in CLEANINGmode the water pump is the only component in operation to circulate the cleaning solution in the entire water system. 7. Let the unitto remainin the CLEANING thenturntheprogram modeforabout20minutes on STANDBY again. selector 8. Flushout the cleaningsolutionfromthe thenpourontoeachevaporator sumpreservoirs cavitytwo or threelitersof cleanpotablewater to rinseand solution witha capfullof antibacteria the moldcupsandtheplaten. sanitize removethewaterspraybarto clean lf necessary B. itseparately aspersteps3 and4 ofparagraph 9 . T u r n a g a i n t h e p r o g r a ms e l e c t o ro n inoperation isagain Thewaterpump CLEANING. solution thewaterandtheantibacterial tocirculate in orderto rinsetheentirewatersystem. fromthesump solution 10. Flushouttherinsing selector on REthenturntheprogram reservoir S E T / H l T E M P E R A T U R Ep o s i t i o n a n d immediatelyafterward to FREEZING OPERATION. NOTE.Bv settinqthe selectoron RE'SET first and ihen to-FREEZINGOPERATION the ice maker wiil pertorm the 5 minutes phasei.e. the waterinlet WATERFILLING solenoidvalveopens to allow the incoming waterto rinseagainthe watersystemand to propertyfitl-up-thesump reséruoirfor the next freezingcycle. coverandthe 11. Placeagainthe evaporator unitservicepanels. of the freezingand harvest 12. At completion cyclemakesureof propertextureandclearness of the icecubesandthat,theydo nothaveany acidtaste. ATTENTION. In case the ice cubes are cloudy, white and havean acid taste,melt them immediately by pouring on them some warm water. This to prevent that somebody could use them. of 13. Wipecleanandrinsetheinnersurfaces thestoragebin. REMEMBER.Topreventthe accumulation of undesirablebacteria it is necessary to sanitizetheinteriorof thestoragebin withan anti-algaedisinfectantsolutioneveryweek. @ Uoooó ct) É o rt) = ttr U) tll É = ELECTR. TIMER É Ilj o= É c, LL,l = oo CE o v) v> EI CE CL = o CJ Rx Tx '*=3 w=5 E o- WATER PUMP