Ice-O-Matic UCG085A User manual

Ice-O-Matic
Brand
Ice-O-Matic
Model
UCG085A
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
th
Ave.
Denver,Colorado80239
1‐866‐PURE‐ICE
PartNumber9081522‐02
Revision03/21
UCGGOURMETSERIESUNDERCOUNTER
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,andmaintenancefortheIce‐O‐MaticUCGUndercounterSeriesicemakers.To
retainthesafetyandperformancebuiltintothisicemaker, itis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 andremove the protection sheet. Pullout thecorner posts,and thenremovet
he
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thef
an
blademovesfreely.
6. Checkthatthecompressorfitssnuglyontoallitsmountingpad
s.
7. Remove
allinternalsupportpackagingandmaskingtape.
8. Useaclean,dampclothtowipethesurfacesinside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.Criteriaforselectionoflocationinclude
:
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compartmenttomaintain
propercondensingoperation.
2. Leveltheunitinboththeleftto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shouldnot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 anda 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watersupplies,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18mm(3/4")I.D.runsto an open
trappedandventeddrain.Whenthedrainisalongrun,allow3cm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withinaminimumof50˚F(
10˚C)
ev
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,andis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(
1
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
s
snugl
yfittedontothemountingpads?
9. Havethebinlinerandcabinetbeenwipedclean?
10. Hastheowner/userbeengiventheInstallationandServiceManualandbeeninstructed
on
t
heimportanceofperiodicmaintenanceche
cks?
11. H
astheunitbeenregisteredforwarranty?Checkforcorrectmodelandserialnumberaga
inst
th
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andthe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plumbingand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icemaking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).
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
G.
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.
H.
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 30C
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.
I.
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.
J.
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1C
(35F)OUTand4C(39F)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21C(70F)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(108,5bar‐140120psig)withtheunita21C(70F)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(120140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to1.0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.00.1bar‐01.5psigonthemodelsUCG45/65/85and0.85and0.20.3bar(34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1C(35F)OUTand4C(39F)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90F).
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70C(158F).
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
HI
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
R
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andwhether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 UCG085A User manual

Ice-O-Matic
Brand
Ice-O-Matic
Model
UCG085A
Type
User manual
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