Ice-O-Matic UCG165A User manual

Brand: Ice-O-Matic

Model: UCG165A

Type: User manual

This manual is also suitable for

MODELS‐UCG45,UCG65,UCG85,UCG105,UCG135,UCG165

InstallationandServiceManual

Ice‐O‐Matic

11100E.45

Ave.

Denver,Colorado80239

1‐866‐PURE‐ICE 

PartNumber9081522‐02

Revision03/21

UCGGOURMETSERIESUNDERCOUNTER

pg.2

UCGGOURMETSERIESUNDERCOUNTER

pg.3

GENERALINFORMATIONANDINSTALLATION

A. INTRODUCTION

Thismanualprovidesthespecificationsandthestep‐bystepproceduresfortheinstallation,startup,

operation,cleaning,andmaintenancefortheIce‐O‐MaticUCGUndercounterSeriesicemakers.To

retainthesafetyandperformancebuiltintothisicemaker, itisimportant thatinstallationand

maintenancebeconductedinthemanneroutlinedinthismanual.

Formoretechnicalinformation,refertowww.iceomatic.com.

B. UNPACKINGANDINSPECTION

1. CallyourauthorizedIce‐O‐MaticDistributororDealerforproperinstallation.

2. Visuallyinspecttheexteriorofthepackagingandskid.Anyseveredamagenotedshouldbe

reportedtothedelivering

carrier.

3. Cutandre

movetheplasticstripsecuringthecartonboxtotheskid.Cutopenthetopofthe

carton andremove the protection sheet. Pullout thecorner posts,and thenremovet

carton.

4. R

emovethefrontpaneloftheunit,andinspectforanyconcealeddamage.Notifythecarrier

ofanyconcealeddamage.

5. Checkthatrefrigerantlinesdonotrubagainstortouchotherlinesorsurfaces,andthef

blademovesfreely.

6. Checkthatthecompressorfitssnuglyontoallitsmountingpad

7. Remove

allinternalsupportpackagingandmaskingtape.

8. Useaclean,dampclothtowipethesurfacesinsidethestoragebinandtheoutsideofthe

cabinet

9. See

dataplateontherearsideoftheunitandcheckthatlocalmainvoltagecorrespondswith

thevoltagespecifiedonit.

10. Registertheunitatwww.iceomatic.com/warranty.

11. Inst

allandadjustlegsprovidedtoleveltheunit.

C. LOCATIONANDLEVELING

1. Positiontheunitintheselectedpermanentlocation.Criteriaforselectionoflocationinclude

a. M

inimum room temperature of 50˚F (10˚C) and maximum room temperature of

100˚F(40˚C).

CAUTION:Incorrectvoltagesuppliedtotheice

makerwillvoidyourpartsreplacementprogram.

WARNING:Thisicemakerisdesignedforindoorinstallationonly.

Extendedperiodsofoperationattemperaturesexceedingthefollowing

limitationswillconstitutemisuseunderthetermsoftheIce‐O‐Matic

Manufacturer’sLimitedWarranty,resultinginlossofwarrantycoverage.

UCGGOURMETSERIESUNDERCOUNTER

pg.4

b. Minimum water inlet temperature of 40˚F (5˚C) and maximum waterinlet

temperatureof90˚F(35˚C).

c. Wellventilatedlocation.

d. Serviceaccess:adequatespacemustbeleftforallserviceconnectionsthroughthe

rearoftheicemaker.Aminimumclearanceof6”(15cm)mustbeleftatthesidesof

theunitforroutingairdrawnintoandexhaustedoutofthecompartmenttomaintain

propercondensingoperation.

2. Leveltheunitinboththelefttorightandfronttoreardirections.

D. ELECTRICALCONNECTIONS

Seedataplateforcurrentrequirementstodeterminewiresizetobeusedforelectricalconnections.

AllIce‐O‐Maticicemakersrequireasolidearthwire.Theyaresuppliedfromthefactorycompletely

pre‐wiredandrequireonlyelectricalpowerconnectionstotherearoftheunit.Makesurethe

icemakerisconnectedtoitsowncircuitandindividuallyfused(seedataplateforfusesize).

Themaximumallowablevoltagevariationshouldnotexceed‐10%and+10%ofthedataplate

rating.  Low voltage can cause faulty functioning and may be responsible for serious damage to the

overload switch and motor windings.  Check voltage on the line and the ice maker’s data plate

beforeconnectingtheunit.

E. WATERSUPPLYANDDRAINCONNECTIONS

GENERAL

Whenchoosingthewatersupplyfortheicemakerconsiderationshouldbegivento:

a. Lengthofrun

b. Waterclarityandpurity

c. Adequatewatersupplypressure

Sincewateristhemostimportantsingleingredientinproducingice,thethreeitemslistedaboveare

extremelysignificant.Lowwaterpressure,below14psi(1bar),maycausemalfunctionoftheice

maker.Watercontainingexcessivemineralswilltendtoproducecloudyicecubes,inadditiontoscale

build‐uponpartsofthewatersystem.

WATERSUPPLY

Connectthe¾”malefittingofthesolenoidwaterinletvalve,usingtheflexibletubesupplied,tothe

cold‐watersupply line with regular plumbingfitting anda shut‐off valveinstalled in an accessible

positionbetweenthewatersupplylineandtheunit.Ifwatercontainsahighlevelofimpurities,itis

advisabletoconsidertheuseofanappropriatewaterfilter.

NOTE:Allexternalwiringshouldconformtonational,

state,andlocalstandardsandregulations.

UCGGOURMETSERIESUNDERCOUNTER

pg.5

WATERSUPPLY‐Watercooledmodels(UCG165)

Thewatercooledversionsrequiretwoseparateinletwatersupplies,oneforthewatersprayedfor

makingtheicecubesandtheotherforthewatercooledcondenser.Connectthe3/4"malefittingof

thewaterregulatingvalveusingtheflexiblehosesuppliedwiththeunittothecoldwatersupplyline

withregular plumbingfittingand a shut‐offvalve installedin anaccessible position betweenthe

watersupplylineandtheunit.

WATERDRAIN

Therecommendeddraintubeisaplasticorflexibletubewith18mm(3/4")I.D.runsto an open

trappedandventeddrain.Whenthedrainisalongrun,allow3cmpitchpermeter(1/4"pitchper

foot).Averticalopenvent,attheunitdrainconnection,isalsorequiredforpropersumpdrainage.

WATERDRAIN‐Watercooledmodels

Thewaterdrainlinefromthecondenser,onwatercooledversions,isinternallyconnectedwiththe

drainfittingoftheunit.Itisstronglyrecommendedthereforetoinstallaverticalopenventonunit

drainlinehighpointtoensuregooddrainingandtodirectthedrainlinetoatrappedandvented

floordrainreceptacle.Thistomakesureoftheproperflowofthedrainedwateras,incaseofpoor

drainage,thewaterranningoutfromthecondensermayinopportunelyflow,throughtheunitdrain

tubing,intotheicestoragebin.

F. FINALCHECKLIST

1. Istheunitinaroomwheretheambienttemperaturesarewithinaminimumof50˚F(

10˚C)

eninwintermonths?

2. Isthereatleasta6”(15cm)clearancearoundtheunitforproperaircircul

ation?

3. Istheun

itlevel?(IMPO

RTANT)

4. Hav

ealltheelectricalandplumbingconnectionsbeenmade,andisthewatersupplyshut‐off

valveopen?

5. Hasthevoltagebeentestedandcheckedagainstthedataplaterating

6. Has

thewatersupplypressurebeencheckedtoensureawaterpressureofatleast14psi(

bar)?

7. Checkallrefrigerantlinesandconduitlinestoguardagainstvibrationsandpossiblefailure

8. Hav

etheboltsholdingthecompressordownbeencheckedtoensurethatthecompressori

snugl

yfittedontothemountingpads?

9. Havethebinlinerandcabinetbeenwipedclean?

10. Hastheowner/userbeengiventheInstallationandServiceManualandbeeninstructed

heimportanceofperiodicmaintenanceche

cks?

11. H

astheunitbeenregisteredforwarranty?Checkforcorrectmodelandserialnumberaga

inst

eserialplate.

NOTE.Thewatersupplyandthewaterdrainmustbe

installedtoconformwiththelocalcode.Insomecasea

licensedplumberand/oraplumbingpermitisrequired.

UCGGOURMETSERIESUNDERCOUNTER

pg.6

12. HastheownerbeengiventhenameandthephonenumberoftheauthorizedIce‐O‐Matic

ServiceAgencyservinghim/her?

G. INSTALLATIONPRACTICE

H.OPERATINGINSTRUCTIONS

STARTUP

Afterhavingcorrectlyinstalledtheicemakerandcompletedtheplumbingandelectricalconnections,

performthefollowing“start‐up”procedure.

UCG45/65/85/105

A‐Removetheunitfrontpanelandlocatethecleaningswitchonthecontrolbox.

B‐Fill Reservoir with cleaningswitchincleaningposition(II).Thiswillclosetheelectricalcircuittothe

waterinletvalveandtothehotgasvalve.

C‐SwitchONthepowerlinedisconnectswitch.Unitwillstartupinwaterfillingphasemode.During

thisphasethecomponentsenergizedare:

WATERINLETSOLENOIDVALVE

HOTGASSOLENOIDVALVE

TheWaterpumpandtheFanmotorarealsoinoperation.

D‐Letunitstayinwaterfillingphasemodeforaboutthree/fourminutestillwateriscomingoutfrom

thedrainhose,thenmovethecleaningswitchtotheoperationposition(I).

WARNING:Thisicemakerisnotdesignedforoutdoorinstallationandwillnotfunctionin

ambienttemperaturesbelow50˚F(10˚C)andabove100˚F(40˚C).Thisicemakerwill

malfunctionwithwatertemperaturesbelow40

F(5˚C)orabove90

F(35˚C).

UCGGOURMETSERIESUNDERCOUNTER

pg.7

UCG135/165 (BOARD)

E‐GivepowertotheunittostartitupbyswitchingONthepowerlinemainswitch;theunitwill

startautomaticallyindefrostcyclewiththefollowingcomponentsenergized:

WATERINLETSOLENOID

VALVEHOTGASVALVE

COMPRESSOR

ELECTRONICTIMER

OPERATIONALCHECKS

A. Theunitnowstartsitsfirstfreezingcyclewiththefollowingcomponentsinoperation:

COMPRESSOR

WATERPUMP

FANMOTORinaircooledversion

B. Checktoseethroughtheicecurtainthatthespraysystemiscorrectlyseatedand

thatthewaterjetsuniformelyreachtheinterioroftheinvertedcupmolds;alsomakesurethat

theplasticcurtainishangingfreelyandthereisnotexcessivewaterspillingthroughit.

C. Theicemakingprocesstakesplacethereby,withthewatersprayedintothemoldsthatgets

graduallyrefrigeratedbytheheatexchangedwiththerefrigerantflowingintotheevaporator

serpentine

.

D.OnunitsUCG45/65/85/105whentheevaporatortemperaturereachesapresetvaluethe

evaporatorthermostatorcubesizecontrolchangesitscontacts;thefreezingcycleendsandstarts

thedefrostorharvestcycle.

E. OnmodelsUCG135/165freezingcycleiscompletedthroughanelectronictimerenergizedby

theevaporatorthermostat.Itstartswhenthecubesizethermostat/controlbulb(pigtail)locatedon

theevaporatorserpentinereachesatemperatureofapprox.‐15°C(5°F).

Check,duringthefirstdefrost/harvestcycle,thattheincomingwaterflowscorrectlyintothe

sumpreservoirinordertore‐fillitandthe

esurplus

overflowsthroughtheoverflowdraintube.

NOTE.Duringthedefrostcycle,thewaterinlet

solenoidvalveisenergized.Thewaterflows

throughthevalvetothebacksideofthe

evaporatorplatenandthendowntofillupthe

i c e m a k e r s u m p t a n k f o r t h e n e x t f r e e z i n g c y c l e .

OnunitsUCG135/165theadditionalTime(12')ofthefreezingcyclestartswhenthecubesize

thermostatcontrolbulb(pigtail)locatedontheevaporatorcoilreachesatemperatureofapprox.‐

15C.Freezingtimewillrangebetween20and22minutesina21Cambienttemperature,longerif

abovethistemperatureandshorterifbelow.ThentheunitgoesdirectlyintotheDefrostCycle.The

averagecompletecycletimeisbetween23and25 minutes.

UCG GOURMET SERIES UNDERCOUNTER

pg. 8

Check the texture of ice cubes just released. Right size must have a small depression (about 5-6

mm) in their crown.If not, wait for the second defrost/harv before performing any adjustment.

If required on model UCG 45/65/85/105, the length of the freezing cycle can be modified by

turning the knob of the cube size control or evaporator thermostat located in

front of the

machine until the desired size is achieved.

if the temperature

of the room in which

the machine is place

is below 20°C, the

cubes will tend to be

partly hollowed out

(see fig. on right).

If, on the other

hand, the room

temperature is

above 30°C the

cubes produced will

have a jagged rim of

ice around the

crown.

UCGGOURMETSERIESUNDERCOUNTER

pg.9

Ifitisthoughtnecessary,theabovesituationscanberectifiedby,inthefirstcase,turningthe

controlknob(aslittleorasmuchasisrequired)clockwiseand,inthesecondcase,turningthe

knobtotherightcounterclockwise.

Itshould,however,berememberedthatiftheroomtemperaturereturnslatertothe20 30C

range,theknobindicatormustonceagainbeturnedtothepreviousposition.

Iftheicecubesareshallowandcloudy,itispossiblethattheicemakerrunsshortofwater

duringtheendofthefreezingcycleor,thequalityofthesuppliedwaterrequirestheuseofan

appropriatewaterfilterorconditioner.

Attheendofthedefrostorharvestcycleholdahandfuloficecubesagainstthebulbofthe

storagebinthermostat;theicemakerswitchOFFinaboutone‐twominutes.Takeouttheice

fromthestoragebinthermostat.Theicemakershouldrestartautomaticallyinthree‐four

minutes.

Re‐fittheunitfrontpaneltheninstructtheowner/useronthegeneraloperationoftheice

machineandaboutthecleaningandcareitrequires

PRINCIPLEOFOPERATION

IntheIce‐O‐Maticcubeicemakers,thewaterusedtomaketheiceiskeptconstantlyincirculationby

anelectricwaterpumpwhichprimesittothespraysystemnozzlesfromwhereitisdivertedintotheinvertedmold

cupsoftheevaporator.Asmallquantityofthesprayedwaterfreezesintoice;therestofitcascadesbygravity

intothesumpassemblybelowforrecirculation.

NOTE.Thebinthermostatisfactorysetat1C

(35F)OUTand4C(39F)IN.

UCGGOURMETSERIESUNDERCOUNTER

pg.10

UCGGOURMETSERIESUNDERCOUNTER

pg.11

FREEZINGCYCLE

Thehotgasrefrigerantdischargedoutfromthecompressorreachesthecondenserwhere,beingcooled

down,condensesintoliquid.Flowingintotheliquidlineitpassesthroughthedrier/filter,thenitgoesall

thewaythroughthecapillarytubewhereitloosesitspressure.Nexttherefrigerantentersintothe

evaporatorserpentine(whichhasalargerdiameterthenthecapillarytube)andstartstoboiloff;this

reactionisemphasizedbytheheattransferredbythesprayedwater.Therefrigerantthenincreasesin

volumeandchangesentirelyintovapor.

Thevaporrefrigerantthenpassesthroughthesuctionaccumulator(usedtopreventthatanysmall

amountofliquidrefrigerantmayreachthecompressor)andthroughthesuctionline.Inboththe

accumulatorandthesuctionlineitexchangesheatwiththerefrigerantflowingintothecapillarytube

(warmer),beforeit issuckedinthecompressorandtoberecirculatedashotcompressedrefrigerant

gas.

ThefreezingcycleonUCG45/45/65/85/105iscontrolledbyonlytheevaporatorthermostatwhichhas

itsbulbincontactwiththeevaporatorserpentinewhileinUCG135/165thereisansecondphase

controlledbyatimer.

Theelectricalcomponentsinoperationduringthefreezingcycleare:

COMPRESSOR

WATERPUMP

FANMOTOR(inaircooledversion)

OnUCG45/65/85aircooledversionstherefrigerantheadpressureisgraduallyreducedfromavalueof

approx.11bars(155psig)atthebeginningofthefreezingcyclewiththeunitat21C(70F)ambient

temperature,toaminimunvalueofapprox.7bars(100psig)justattheendofthefreezingcyclefew

secondsbeforethestartingofthedefrostcycle.

UCGGOURMETSERIESUNDERCOUNTER

pg.12

OnUCG105/135/165aircooledversionstherefrigerantheadpressureiskeptbetweentwopre‐set

values(108,5bar‐140120psig)withtheunita21C(70F)ambienttemperature.Thedecliningof

thepressureisreliedtothereductionoftheevaporatingpressure,causedbytheprogressivegrowthof

theicethicknessintotheinvertedcupmoldsandtotheflowofairdrownthroughtheaircooled

condenserbythefanmotor.Theabovevaluesareinrelationaswelltotheambienttemperatureofthe

icemakersiteandtheyaresubjecttorisewiththeincreaseofthistemperature.

OnUCG45/65/85/105/135watercooledversionstherefrigerantheadpressurerangesbetween8.5and

10bars(120140psig)beingcontrolledbyanautomatichipressurecontrolthatenergizesawater

solenoidvalvelocatedonthewaterlinetothecondenser,whichratesthecoolingwatertothe

condenser.OnUCG165watercooledversionstheheadpressureisconstantat9.5bar(135psig)

controlledbyawaterregulatingvalve.

Atstartingoffreezingcycletherefrigerantsuctionorlo‐pressurelowersrapidlyto1.0bar‐14psigthen

itdeclinesgradually‐inrelationwiththegrowingoftheicethickness‐toreach,attheendofthecycle,

approx.00.1bar‐01.5psigonthemodelsUCG45/65/85and0.85and0.20.3bar(34psig)on

modelsUCG105/135/165withthecubesfullyformedinthecupmolds.Thetotallengthofthefreezing

cyclerangesfrom23to25minutes.

DEFROSTORHARVESTCYCLE

OnUCG45/65/85105thetemperatureoftheevaporatorthermostat,incontactwiththeevaporator

serpentine,dropstoapre‐setvalueitchangesitselectricalcontactsenergizingtheherebelowshown

components.OnUCG135/165whenthetimerchangesitselectricalcontactsenergizingthesame

components).

COMPRESSOR

WATERINLETSOLENOID

VALVEHOTGASSOLENOIDVALVE

Theincomingwater,passingthroughthewaterinletvalveandtheflowcontrol,runsoverthe

evaporatorplatenandthenflowsbygravitythroughthedribblerholesdownintothesump/reservoir.

Thewaterfillingthesump/reservoirforcespartofthesurpluswaterfromthepreviousfreezingcycle

togoouttothedrainthroughtheoverflowpipe.Thisoverflowlimitsthelevelofthesumpwater

whichwillbeusedtoproducethenextbatchoficecubes

Meanwhiletherefrigerant,ashotgasdischargedfromthecompressor,flowsthroughthehotgasvalve

directlyintotheevaporatorserpentineby‐passingthecondenser.

Thehotgascirculatingintotheserpentineoftheevaporatorwarmsupthecoppermoldscausingthe

harvestoftheicecubes.Theicecubes,releasedfromthecups,dropbygravityontoaslantedcube

deflector,thenthroughacurtainedopeningtheyfallintothestoragebin.

UCGGOURMETSERIESUNDERCOUNTER

pg.13

OnUCG45/65/85/105whenthetemperatureoftheevaporatorthermostatbulbreachesthevalueof

+3°F÷4°Ctheirelectricalcontactsmovebacktothepreviouspositionactivatinganewfreezingcycle

anddeenergizingboththehotgasandthewaterinletvalves(closed).OnUCG135/165assoonasthe

timercompletesit's cycle,itactivatesanewfreezingcycledeenergizingboththehotgasandthewater

inletvalves(closed).

COMPONENTSDESCRIPTION

WATERPUMP

Thewaterpumpoperatescontinuallythroughoutthefreezingcycle.Thepumppushesthewaterfrom

thesumptothespraysystemandthroughthespraynozzlesspraysitintotheinvertedcupmoldsto

befrozenintocrystalclearicecubes.

WATERINLETSOLENOIDVALVE‐3/4MALEFITTING

Thewaterinletsolenoidvalveisenergizedonlyduringthedefrostcycle.Whenenergizeditallowsa

meteredamountofincomingwatertoflowovertheevaporatorcavitytoassistthehotgasindefrosting

theicecubes.Thewaterrunningovertheevaporatorcavitydropsbygravity,throughthedribblerholes

oftheplaten,intothesumpreservoir.OnUCG45/65/85/105/135watercooledversionsthewaterinlet

solenoidvalvehasoneinletandtwooutletswithtwoseparatesolenoidsenergizedthefirst(ice

production)bythecontacts3‐2oftheevaporatorthermostatandthesecond(watercooledcondenser)

byaspecifichipressurecontrol.

HOTGASSOLENOIDVALVE

Thehotgassolenoidvalveconsistsbasicallyintwoparts:thevalvebodyandthevalvecoil.Duringthe

defrostcyclethehotgasvalvecoilisactivatedsotoattractthehotgasvalvepistoninordertogiveway

tothehotgasdischargedfromcompressortoflowdirectlyintotheevaporatorserpentinetodefrostthe

formedicecubes.

BINTHERMOSTAT

Thebinthermostatcontrolbodyislocatedinthefrontofcontrolboxbehindthefrontpanel.The

thermostatsensingtubeislocatedintoabulbholderonthesidewalloftheicestoragebinwhereit

automaticallyshutstheicemakerOFFwhenincontactwiththeiceandre‐startstheicemakerwhenthe

iceisremoved.Factorysettingsare1C(35F)OUTand4C(39F)IN.

CUBESIZECONTROL(EVAPORATORTHERMOSTAT)

Thecubesizecontrol(evaporatorthermostat)bodyislocatedinthecontrolboxbehindthefrontpanel;

it’sbasicallyareverseactingtemperaturecontrolwhichclosesthecontacts3‐2whenitstemperature

decreasesandclosestheoppositecontacts3‐4whenthetemperaturerises.

Thethermostatsensingbulbislocatedintoaplastictube(bulbholder)securedbytwoclipsdirectlyto

theevaporatorserpentine.Thiscontroldeterminesthelengthofthefreezingcycleandcorrespondingly

NOTE.OnmodelsUCG45,65,85and105thelengthofthedefrost/harvest

cycle(notadjustable)changesaccordingtotheambienttemperature

(shorterforhiambienttemperatureandlongerforlowone).

UCGGOURMETSERIESUNDERCOUNTER

pg.14

thesizeofthecubes.Alowersettingwillproducealargercube(oversize)whileahighersettinga

smallercuber(shallowsize).Whenclosedoncontacts3‐2itactivatesthedefrostorharvestcycle

components.Thecubesizecontrolissetupinthefactory(knobintheblackdotposition)anddoesn't

requireanyadjustmentwhentheambienttemperatureremainsbetween20and30C(70and90F).

UCG135–165

Theevaporatorthermostatwithitssensingbulbintimatelyincontactwiththerefrigerantoutlettube

fromtheevaporatorsensestheevaporatingrefrigeranttemperature(whichdeclinesinthecourseof

thefreezingcycle)andwhenthisonereachesthepre‐setvalue (5°F;-15°C)itswitchesitscontactsfrom

3‐4to3‐2toactivatethefinishingcycle(2ndphase)whichhasapre‐setextensiondeterminedbythe

largediameterlobeofthetimer.

FANMOTOR(Aircooledversion)

ThefanmotoronUCG45/65/85/105iselectricallyconnectedinparalleltothewaterpumpandit

operatescontinuouslyonlyduringthefreezingcyclekeepingtheproperheadpresscirculatingair

throughthecondenserfins.OnUCG135/165theoperationoffanmotoriscontrolledbyafan

pressurecontroladjustedatpresetvalues. (100-140 psi)

COMPRESSOR

Thehermeticcompressoristheheartoftherefrigerantsystemanditisusedtocirculateandretrieve

therefrigerantthroughouttheentiresystem.Itcompressesthelowpressurerefrigerantvaporcausing

itstemperaturetoriseandbecomehighpressurehotvapor(hotgas)whichisthenreleasedthroughthe

dischargevalve.

WATERSPRAYSYSTEM

Throughitsnozzlesitspraysthewaterineachindividualcuptobefrozenintoice.

SAFETYHITEMPERATURETHERMOSTAT

LocatedinthecontrolboxitisamanualresetswitchthattripsOFFtheoperationofthemachinewhen

itsbulb(locatedontheliquidlinejustbeforethedrier)reachesthetemperatureof70C(158F).

CLEANINGSWITCH(UCG45/65/85/105 Preset to position 2)

Locatedonthebottomleftsideofthecontrolboxisusedtoenergizethewaterinletandthehotgas

valvessotochargethewaterintothesumptankofthemachine.

UCGGOURMETSERIESUNDERCOUNTER

pg.15

PRESSURECONTROL(Watercooledversion)

UsedonlyonUCG45/65/85/105/135watercooledversionsitoperatestokeepbetweentwopreset

valuesthehi‐sideordischargepressureoftherefrigerantsystembyenergizingthecoilofthewaterinlet

solenoidvalvethatcontrolthecoolingwaterflowtothecondenser.

ELECTRONICTIMER(UCG135‐165)

EquippedwithaTwoKeysDipSwitchandonePotentiometer,itmanagethelengthofsecondfaseofthe

freezingcycleandtheentiredefrost/harvestcyclewithafactorypre‐settimes.Thefirstkey(1)replaces

the“CompressorSwitch”usedonthepreviouselectro‐mechanicalversion;factorysettingisONposition

toenergizethecompressorduringthestandardoperationoftheicemachine.Thesamekey(1)is

switchedtoOFFpositionwhenthecleaningcycleisrequiredkeepingthewaterpumponlyinoperation.

Thesecondkey(2)allowsthesettingofthetimedportion(Ta)ofthefreezingcycleaccordingtothe

modeloftheicemachine.

DipSwitchfactorysettingcombinations

N.1 N.2

UCG135/165 ON ON

e s u m i n g C h a r t w i t h K e y s  1 & 2  f u n c t i o n s 

N.1 N.2

ON

Standard Setting

Compressor ON

Ta = 12'

OFF

Cleaning Mode

Compressor OFF

Ta = 8'

UCGGOURMETSERIESUNDERCOUNTER

pg.16

Thepotentiometerisusedtoadjustthedefrosttimeanditissetdirectlyfromthefactoryaccordingto

themodeloftheicemachine.Itcanbeadjustablefromaminimumdefrosttimeof60"(turnclockwise),

toamaximumof180"(turncounterclockwise).

MASTERSWITCH(onlyUCG45/65/85/105 Switch Position 1)

Fittedinthecontrolboxthemasterswitchhastobeusedtostart‐upandtostoptheicemaker

operation.

COMPRESSORSWITCH

(onlyUCG135/165)

Locatedinthecontrolboxisusedtode‐energizedthecompressorduringthecleaning.

FANPRESSURECONTROL(onlyUCG135‐135)

Usedonaircooledicemakerstomaintaintheheadpressurewithinthepresetvalues.

WATERREGULATINGVALVE(onlyUCG165Watercooledversiononly)

Thisvalvecontrolstheheadpressureintherefrigerantsystembyregulatingtheflowofwatergoingto

thecondenser.Aspressureincreases,thewaterregulatingval‐veopenstoincreasetheflowofcooling

water.



UNITREFRIGERANTCHARGES

TheUCGUndercounterSeriescontainsR134Arefrigerant.Seetablebelowforspecificsbymodel.

Model Electrical

(volts/Hz/phase)

Fuse

Size

(Amp)

Amps

(UnitRLA)

Refrigerant

Charge

R134A

UCG45A 230/50/1 10 2.2 250gr–8.82oz

UCG45W 230/50/1 10 2.2 250gr–8.82oz

UCG65A 230/50/1 10 2.4 260gr–9.17oz

UCG65W 230/50/1 10 2.4 250gr–8.82oz

UCG85A 230/50/1 10 3.2 290gr–10.2oz

UCG85W 230/50/1 10 3.2 250gr–8.82oz

UCG105A 230/50/1 10 3.5 320gr–11.3oz

UCG105W 230/50/1 10 3.5 250gr–8.82oz

UCG135A 230/50/1 10 3.8 330gr–11.6oz

UCG135W 230/50/1 10 3.8 300gr–10.6oz

UCG135A 230/50/1 10 5.3 320gr–11.3oz

UCG135W 230/50/1 10 5.3 330gr–11.6oz

SERVICE DIAGNOSIS

SYMPTOM POSSIBLE CAUSE SUGGESTED CORRECTION

Unit will not run Main switch in OFF position Turn switch to ON position

Safety device intervention Eliminate the stop motivation and

(thermostat - pressure switch) push the reset button or replace.

Loose electrical connections Check wiring

Inoperative bin thermostat Replace thermostat

Compressor cycles Low voltage Check circuit for overloading

intermittently Check voltage at the supply to

the building. If low, contact the

power company

Contactor with burnt contacts Clean or replace

Non-condensable gas in system

Purge the system

Compressor starting device Check for loose wires in starting

with loose wires device

To high room temperature Move the unit in a more

suitable place

Cubes too small Freezing cycle too short Review setting of DIP SWITCH

keys

Capillary tube partially restricted

Blow charge, add new

gas & drier, after evacuating

system with vacuum pump

Moisture in the system Same as above

Shortage of water

See remedies for shortage of water

Shortage of refrigerant Check for leaks & recharge

Inoperative evaporator thermostst

Replace thermostst

Cloudy cubes Shortage of water

See remedies for shortage of water

Dirty water supply Use water softner or water filter

Accumulated impurities cleaner Use Cleaner Ice Machine

Water pump loosing disch. pressure

Check bearings. Replace.

Shortage of water

Water spilling out through curtain

Check or replace curtain

Water solenoid valve not opening

Replace valve

Water leak in sump area Locate and repair

Water flow control plugged Remove and clean

pg. 17

UCG GOURMET SERIES UNDERCOUNTER

Irregular cubes Some jets plugged Remove jet cover and clean

size & some cloudy

Shortage of water See shortage of water

Unit not level Level as required

Cubes too large Freezing cycle too long Adjust evap. thermostat

Inoperative evaporator thermostat Replace thermostat

Decreased ice capacity Inefficient compressor Replace

Leaky water valve Repair or replace

Non-condensable gas in system Purge the system

Poor air circulation or excessive Relocate the unit or provide for

hot location more ventilation

(

Overcharge of refrigerant Correct the charge. Purge off slowly

Capillary tube partially restricted Blow charge, add new gas & drier,

after evacuating system with

vacuu pump

Hot gas solenoid valve leaking Replace valve

Undercharge of refrigerant Charge to data plate indication

Discharge head pressure too high See incorrect discharge pressure

Poor harvest Restriction in incoming water line Check water valve strainer and flow

control. If necessary enlarge the

flow control orifice

Water inlet valve not opening Valve coil with open winding

Replace valve

Hot gas valve orifice restricted Replace hot gas valve assy

Discharge head pressure too low See incorrect discharge pressure

Incorrect discharge pressure Inoperative fan pressure control Replace pressostat

Inoperative fan motor Replace

Water regulating valve misadjusted Adjust its setting stem

Excessive water in unit base Water tubing leaking Check. Tighten or replace

SERVICE DIAGNOSIS

SYMPTOM POSSIBLE CAUSE SUGGESTED CORRECTION

pg. 18

UCG GOURMET SERIES UNDERCOUNTER

UCGGOURMETSERIESUNDERCOUNTER

pg.19

CLEANING

Ice‐O‐Maticrecommendscleaningtheicemachineevery6months,butnotmorethanonceper

monthtoavoidpotentialdamagetothemachine.

ADJUS

TMENTPROCEDURES

A. ADJUSTMENTOFTHECUBESIZE

NOTE: Before performing actual adjustment of the

cubesize,checkotherpossiblecausesforcubesize

problems,refertotheServiceDiagnosisSection

forproblemreviewandanalysis.Donotperform

any adjustment until the ice making system has

progressed through several complete freeze and

harvest cycles in order to observe the size and

qualityoficecubesandwhetherornotthecube

sizeproblemexists.

WARNING:Beforeproceedingwithanycleaningand

maintenanceoperation,makesurethepowerisdisconnected

andwatersupplyisturnedoff.

ifthetemperatureoftheroominwhichthemachineis

placeisbelow20°C,thecubeswilltendtobepartly

hollowedout(seefig.onright).

If,ontheotherhand,theroomtemperatureisabove

30°Cthecubesproducedwillhaveajaggedrimofice

around the crown.

UCG 45-65-85-105

WIRING DIAGRAM

AIR & WATER COOLED

230/50-60/1

pg. 20

UCG GOURMET SERIES UNDERCOUNTER

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Ice-O-Matic UCG165A User manual

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Model: UCG165A

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