Stoelting O231 User manual

Model O231
SERVICE MANUAL
Manual No. 513646 Sept. 2010

This manual provides basic information about the machine. Instructions and suggestions are
given covering its operation and care.
The illustrations and specifications are not binding in detail. We reserve the right to make
changes to the machine without notice, and without incurring any obligation to modify or pro-
vide new parts for machines built prior to date of change.
DO NOTATTEMPT to operate the machine until instructions and safety precautions in this
manual are read completely and are thoroughly understood. If problems develop or questions
arise in connection with installation, operation, or servicing of the machine, contact Stoelting.
Stoelting Foodservice Equipment
502 Highway 67
Kiel, WI 53042-1600
U.S.A.
Main Tel: [phone]
Fax: [phone]
Customer Service: 888.429.5920
Fax: [phone]
Email: [email protected]
© 2014 PW Stoelting, LLC
stoeltingfoodservice.com

Safety Alert Symbol:
This symbol Indicates danger, warning or caution.
Attention is required in order to avoid serious per-
sonal injury. The message that follows the symbol
contains important information about safety.
Signal Word:
Signal words are distinctive words used throughout
this manual that alert the reader to the existence and
relative degree of a hazard.
CAUTION
The signal word “CAUTION” indicates a potentially
hazardous situation, which, if not avoided, may result
in minor or moderate injury and equipment/property
damage.
A Few Words About Safety
Safety Information
Read and understand the entire manual before
operating or maintaining Stoelting equipment.
This manual provides the operator with information
for the safe operation and maintenance of Stoelting
equipment. As with any machine, there are hazards
associated with their operation. For this reason safety
is emphasized throughout the manual. To highlight
specific safety information, the following safety defini-
tions are provided to assist the reader.
The purpose of safety symbols is to attract your at-
tention to possible dangers. The safety symbols, and
their explanations, deserve your careful attention
and understanding. The safety warnings do not by
themselves eliminate any danger. The instructions
or warnings they give are not substitutes for proper
accident prevention measures.
If you need to replace a part, use genuine Stoelting
parts with the correct part number or an equivalent
part. We strongly recommend that you do not use
replacement parts of inferior quality.
WARNING
The signal word “WARNING” indicates a potentially
hazardous situation, which, if not avoided, may result
in death or serious injury and equipment/property
damage.
CAUTION
The signal word “CAUTION” not preceded by the
safety alert symbol indicates a potentially hazardous
situation, which, if not avoided, may result in equip-
ment/property damage.
NOTE (or NOTICE)
The signal word “NOTICE” indicates information or
procedures that relate directly or indirectly to the
safety of personnel or equipment/property.

TABLE OF
CONTENTS
Section Description Page
1 Introduction
1.1 Description .................................................................................................1
1.2 Specifications.............................................................................................1
2 InstallationInstructions
2.1 SafetyPrecautions .....................................................................................5
2.2 ShipmentandTransit .................................................................................5
2.3 MachineInstallation....................................................................................5
2.4 InstallingPermanentWiring........................................................................5
3 Initial Set-Up and Operation
3.1 Operator’sSafetyPrecautions....................................................................7
3.2 OperatingControlsandIndicators...............................................................7
3.3 ImportantInformationRegardingCleaningandSanitizing ............................8
3.4 Disassembly of Machine Parts ...................................................................10
3.5 CleaningDisassembledParts.....................................................................10
3.6 Sanitizing Machine Parts............................................................................11
3.7 CleaningtheMachine .................................................................................11
3.8 AssemblingMachine ..................................................................................11
3.9 Sanitizing ...................................................................................................12
3.10 FreezeDownandOperation .......................................................................12
3.11 MixInformation ...........................................................................................13
4 Maintenance and Adjustments
4.1 AccessingControl Readings andSettings..................................................15
4.2 NavigationandModifyingSettings ..............................................................15
4.3 UserInterfaceScreens ...............................................................................15
4.4 PerformanceScreens .................................................................................16
4.5 Settings Screens........................................................................................16
4.6 Utilities Screens .........................................................................................18
4.7 Errors & Statistics Screens........................................................................20
4.8 UpdatingFirmware .....................................................................................22
4.9 DriveBeltTensionAdjustment....................................................................22
4.10 CondenserCleaning ...................................................................................23
4.11 PreventativeMaintenance ...........................................................................23
4.12 ExtendedStorage.......................................................................................23

Section Description Page
5 Refrigeration System
5.1 RefrigerationSystem ..................................................................................25
5.2 RefrigerantRecoveryandEvacuation ..........................................................25
5.3 RefrigerantCharging ...................................................................................26
5.4 Compressor................................................................................................27
5.5 Condenser ..................................................................................................28
5.6 Valves ........................................................................................................28
A. Thermostatic Expansion Valve (TXV)..................................................................28
B. Automatic Expansion Valve (AXV) .......................................................................29
C Check Valve.........................................................................................................30
D. High Pressure Cutout .........................................................................................30
E. Evaporator Pressure Regulator (EPR) ...............................................................31
F. Water Valve (Water Cooled Models Only)...........................................................32
5.7 Solenoid .....................................................................................................32
5.8 FilterDrier ..................................................................................................34
6 Electrical and Mechanical Control Systems
6.1 Intellitec2Control........................................................................................35
6.2 Contactors..................................................................................................35
6.3 DriveMotor .................................................................................................36
6.4 Capacitors..................................................................................................37
6.5 Gearbox .....................................................................................................37
6.6 CondenserFanMotor(Air-CooledOnly) .....................................................38
6.7 Spigot Switch .............................................................................................38
6.8 TemperatureControlSensor .......................................................................40
7 Troubleshooting
7.1 ErrorCodes ................................................................................................41
7.2 Troubleshooting ..........................................................................................41
7.3 Troubleshooting-Machine..........................................................................44
8 Replacement Parts
8.1 DecalsandLubrication ...............................................................................45
8.2 AugerShaftandFaceplateParts................................................................46
8.3 Spigot Assembly ........................................................................................48
8.4 Panelsand Screws ....................................................................................48
8.5 Electrical Panels ........................................................................................49
8.6 InternalComponents...................................................................................50
8.7 WiringDiagrams.........................................................................................52

1
SECTION 1
INTRODUCTION
1.1 DESCRIPTION
The Stoelting O231 floor machine is gravity fed. The
machine is equipped with the IntelliTec2 control which
provides a uniform product. The O231 is designed to
operate with almost any type of commercial soft serve or
non-dairy mixes available, including: ice milk, ice cream,
yogurt,andfrozen dietarydesserts.
Thismanualisdesignedtoassistqualifiedserviceperson-
nelandoperatorsintheinstallation,operationandmainte-
nanceoftheStoeltingO231gravitymachine.
1.2 SPECIFICATIONS
Figure 1-1 Model O231
Figure 1-2 Specifications

2
1.2 SPECIFICATIONS
Dimensions
width
height
depth
Weight
Electrical
circuit ampacity
(per barrel)
overcurrent protection
device (per barrel)
Compressor
Drive Motor
Cooling
Hopper Volume
Freezing Cylinder
Volume
20A minimum
30A maximum40A maximum
19A minimum
30A maximum
27A minimum
40A maximum
with crate
40-1/4'' (102,2 cm)
64-1/2'' (163,8 cm)
33-1/4'' (84,5 cm)
Air cooled units require 3" (7,6 cm) air
space at back and sides.
Two - 6.5 gallon(24,7 liters)
Two - 1 gallon(4 quart), 3,79 liters
62-1/2'' (158,8 cm)
31-1/2'' (80,0 cm)
640 lbs (290,2 kg)
1 PH
Freezing Cylinders -Two 14,000 Btu/hr (R-404A)
Storage - 1,300 Btu/hr Compressor (R-134a)
Two - 2 hp
26A minimum
26'' (66,0 cm)
O231 Air Cooled
Machine
26'' (66,0 cm) with crate 40-1/4'' (102,2 cm)
62-1/2'' (158,8 cm)
31-1/2'' (80,0 cm)
Watercooled units require 3/8" N.P.T.
water and drain fittings with2 inlets and
2 outlets or1/2" N.P.T. water and drain
fittings with1 inlet and 1 outlet.
Maximum water pressure of 130 psi.
Minimum water flow rate of 3 GPM.
IdealEWTof 50°-70°F
730 lbs (331,1 kg)
3 PH
O231 Water Cooled
640 lbs (290,2 kg)
1 PH
64-1/2'' (163,8 cm)
33-1/4'' (84,5 cm)
730 lbs (331,1 kg)
3 PH
Machine
Menu Display O231
Basic Consistency Cutout *
Cut In Temp 19.5 °F
Cycles untilsleep 20 count
Stir On 15 seconds
Stir Off 300 seconds
Advanced StdbyOntime 10 seconds
StdbyOff time 360 seconds
StdbyTime 120 minutes
Sleep1 drvOn 15 seconds
Sleep1 drvOff 300 seconds
Sleep2 CutinTemp 38 °F
Sleep2 Cutout Temp 30 °F
Default Off Time 600 seconds
Pressure Sensing SWITCH
Liquid Sensing RESIS
Storage Storage CutIn 37 °F
Storage Cut Out 31 °F
Storage Offset 2
Storage Off 2 minutes
Storage On 200 seconds
Storage MaxOn 10 minutes
Storage Recovery 1 minutes
Storage Too Warm Temp 50 °F
Storage Too Warm Time 2hours
O231
Refrigerant R-404A
Charge (W/C) 26 oz
(A/C) 35 oz
Suction Pressure 21 psig
Discharge Pressure 240 psig
EPR Valve 25-26 psig (R-134A Hopper Condenser)
* Consistency Cutout needs to be adjusted to product
requirements.

3
* Resets any time the PUSH TO FREEZE button is pressed or a spigot is pulled. In order for the mode to change, it has to go through its normal cycles without reset. Note:
1) A stir cycle will start in each mode. The cycle is independent of the freezing cycle. 2) Normal start up mode is Sleep 1 when the number of cycles is set below 99. When cycles are set higher than 99,
the freezer will start up in the Serve mode.
3) Sensor failure will keep the control in Serve and Standby modes only. 4) A freeze cycle will reset the stir cycle.
Temperature
CutIn
Temperature
CutOut
Consistency
Freezing Cycle
Sleep 2 CutIn
Standby
Time
Sleep 2 CutIn
Standby
On Time
Standby
Off Time
Sleep 2 Cutout
IntelliTec2 Control Modes of Operation
Standby Mode Sleep 1 ModeServe Mode Sleep 2 Mode
Cycles Until Sleep* Standb
y
Time* Sleep 2 CutIn*
PUSH TO FREEZE or Spigot Pull PUSH TO FREEZE or Spigot Pull
PUSH TO FREEZE or Spigot Pull

4

5
SECTION 2
INSTALLATION INSTRUCTIONS
2.1 SAFETY PRECAUTIONS
Do not attempt to operate the machine until the safety
precautions and operating instructions in this manual are
read completely and are thoroughly understood.
Takenoticeofallwarninglabelsonthemachine.Thelabels
have been put there to help maintain a safe working
environment.Thelabelshavebeendesignedtowithstand
washing and cleaning. All labels must remain legible for
thelifeofthemachine.Labelsshouldbecheckedperiodi-
callytobesuretheycanberecognizedaswarninglabels.
If danger, warning or caution labels are needed, indicate
the part number, type of label, location of label, and
quantityrequired along with your addressand mail to:
STOELTING
ATTENTION: Customer Service
502 Hwy. 67
Kiel, Wisconsin 53042
2.2 SHIPMENT AND TRANSIT
Themachinehasbeenassembled,operatedandinspected
at the factory. Upon arrival at the final destination, the
entire machine must be checked for any damage which
mayhaveoccurredduringtransit.
With the method of packaging used, the machine should
arriveinexcellentcondition.THECARRIERISRESPON-
SIBLE FOR ALL DAMAGE IN TRANSIT, WHETHER
VISIBLEORCONCEALED.Donotpaythefreightbilluntil
the machine has been checked for damage. Have the
carrier note any visible damage on the freight bill. If
concealeddamageand/orshortageisfound later, advise
the carrier within 10 days and request inspection. The
customermustplaceclaimfordamagesand/orshortages
in shipment with the carrier. Stoelting, Inc. cannot make
any claims against the carrier.
2.3 MACHINE INSTALLATION
WARNING
Installation must be completed by a qualified
electrician/refrigeration specialist.
Incorrectinstallationmaycause personalinjury,se-
vere damage to the machine and will void factory
warranty.
Installation of the machine involves moving the machine
close to its permanent location, removing all crating,
setting in place, assembling parts, and cleaning.
Figure 2-1 Space and Ventilation Requirements
A. Uncratethemachine.
B. Installthefourcasters.Turnthethreadedendinto
themachineuntilnothreadsareshowing.Tolevel,
turnoutcastersnomorethan1/4"maximum,then
tighten all jam nuts.
C. The machine must be placed in a solid level
position. NOTE
Accurate leveling is necessary for correct drainage
offreezing cylinderand toinsure correctoverrun.
D. Machines with air cooled condensers require a
minimum of 3" (7,5cm) of space on all sides and
10"(25cm)atthetopforpropercirculation.(Fig.2-
1)
E. Machines that have a water cooled condenser
require1/2"NPT supply anddrainfittings.
2.4 INSTALLING PERMANENT WIRING
Toinstall wiring follow the stepsbelow:
A. Refer to the nameplate on the side panel of the
machineforspecificelectricalrequirements.Make
surethepowersourceinthebuildingmatchesthe
nameplaterequirements.
B. Removethebackpanelandthejunctionboxcover
located at the bottom of the machine.
C. Install permanent wiringaccordingtolocal code.

6

7
SECTION 3
INITIAL SET-UP AND OPERATION
3.1 OPERATOR’S SAFETY PRECAUTIONS
SAFE OPERATION IS NO ACCIDENT; observe these
rules:
A. Know the machine. Read and understand the
OperatingInstructions.
B. Notice all warning labels on the machine.
C. Wearproperclothing.Avoidloosefittinggarments,
and remove watches, rings or jewelry that could
cause a serious accident.
D. Maintain a clean work area. Avoid accidents by
cleaning up the area and keeping it clean.
E. Stay alert at all times. Know which switch, push
button or control you are about to use and what
effect it is going to have.
F. Disconnectpowerformaintenance.Neverattempt
torepairorperformmaintenanceonthemachine
until the main electrical power has been
disconnected.
G. Donotoperateunderunsafeoperatingconditions.
Neveroperatethemachineifunusualorexcessive
noise or vibration occurs.
3.2 OPERATING CONTROLS AND
INDICATORS
Before operating the machine, it is required that the
operatorknowthefunctionofeachoperatingcontrol.Refer
toFigure3-1forthelocationoftheoperatingcontrolsonthe
machine. For the information regarding error codes dis-
played on the control panel, refer to the troubleshooting
section of this manual.
WARNING
High voltage will shock, burn or cause death. The
OFF-ONswitch mustbe placedin theOFF position
prior to disassembling for cleaning or servicing. Do
not operate machine with panels removed.
Figure 3-1 Machine Controls
IntelliTec2 Control
(See Figure 3-2)
Dispense Rate
Adjustor

8
A.INTELLITEC2TOUCHPAD
Main Power On/Off
The Main Power button is used to supply power to the
IntelliTec2 control, the freezing cylinder circuits and the
storage refrigeration system. When the machine is first
pluggedin,thecontroldefaultstotheOnstatuswithpower
to the hopper only. If the Main Power On/Off button is
pressedfor3secondswhenthemachineison,themachine
willturnoff andastatus messagewillbe displayedonthe
screen.
Help
Pressing the Help button will display help information
dependant on the cursor's location. Pressing the Help
button again will exit the help screen.
SelectionButton(SEL)
TheSELbuttonisusedtoselectmenuoptions.Fordetails
of the menu options, refer to Section 4.
SetButton(SET)
TheSET button is used tosave changes whenmodifying
control settings. Refer to Section 4 for details.
On/OffButton
Powertothefreezingcylinderscanthenbecontrolledwith
the On/Off Left and On/Off Right switches. The On/Off
buttonmustbepressedfor3secondstoturnthepoweroff.
Thispreventsaccidentallyturningpoweroff.
Push to Freeze Button
Pressing the PUSH TO FREEZE button initiates "Serve
Mode".
Clean Button
TheCLEANbuttoninitiates"Clean Mode".
Arrow Buttons (⇐, ⇑, ⇒, ⇓⇐, ⇑, ⇒, ⇓
⇐, ⇑, ⇒, ⇓⇐, ⇑, ⇒, ⇓
⇐, ⇑, ⇒, ⇓)
Thearrowbuttonsareusedtonavigatethroughthecontrol
readingsandsettings.Section2containsdetailsonallthe
readingsandsettings.
B. SPIGOT SWITCH
Thespigotswitch ismounted to thespigot cam assembly
behind the header panel. When the spigot is opened to
dispenseproduct,thespigotswitchopensandthe"Serve
Mode"begins.
C.DISPENSERATEADJUSTOR
The dispense rate adjustor is located under the header
panel, to the immediate right of the spigot handles. Turn-
ingtheknobcounterclockwisewilldecreasethedispense
rate.
3.3 IMPORTANT INFORMATION REGARDING
CLEANING AND SANITIZING
Softservemachinesrequirespecialconsiderationwhenit
comes to food safety and proper cleaning and sanitizing.
The following information specifically covers issues for
cleaning and sanitizing frozen dessert machines. This
informationismeanttosupplementacomprehensivefood
safetyprogram.
SOIL MATERIALS ASSOCIATED WITH FROZEN
DESSERTMACHINES
MILKFAT/BUTTERFAT – As components of ice-cream/
frozen custard mix, these soils will accumulate on the
interior surfaces of the machine and its parts. Fats are
difficulttoremove and helpattributeto milkstone buildup.
MILKSTONE – Is a white/gray film that forms on equip-
ment and utensils that are exposed to dairy products.
Thesefilmswillaccumulateslowlyonsurfacesbecauseof
ineffectivecleaning,useofhardwater,orboth.Milkstoneis
usually a porous deposit, which will harbor microbial
contaminantsandeventuallydefysanitizingefforts.
Once milkstone has formed, it is very difficult to remove.
Without using the correct product and procedure, it is
nearly impossible to remove a thick layer of milkstone.
(NOTE: general-purpose cleaners DO NOT remove
milkstone.) This can lead to high bacteria counts and a
food safety dilemma.
IT IS BEST TO CONTROL MILKSTONE ON A DAILY
BASISBEFOREITCANBECOMEASIGNIFICANTFOOD
SAFETY PROBLEM.
Inadditiontofoodsafety,milkstonecancausepremature
weartomachineparts,whichcanaddtocostsforreplace-
ment parts or possibly more expensive repairs if worn
machine parts are not replaced once they have become
excessivelyworn.
IMPORTANTDIFFERENCESBETWEENCLEANINGAND
SANITIZING
CLEANINGvs.SANITIZING
Itisimportanttodistinguishbetweencleaningandsanitiz-
ing. Although these terms may sound synonymous, they
are not. BOTH are required for adequate food safety and
propermachinemaintenance.
Figure 3-2 IntelliTec2 Control

9
CLEANING
· Isthe removal of soil materialsfrom asurface.
· Isaprerequisiteforeffectivesanitizing.
NOTE
An UNCLEAN surface will harbor bacteria that can
defy sanitizing efforts.
Bacteria can develop and resist sanitizing efforts within a
layer of soil material (milkstone). Thorough cleaning pro-
cedures that involve milkstone removal are critical for
operatorsoffrozendessertmachines.
SANITIZING
· Kills bacteria.
· Canbeeffectiveoncleansurfacesonly.
NOTE
Using a SANITIZER on an unclean surface will not
guaranteeacleanandsafe frozen dessertmachine.
PROPER DAILY MAINTENANCE:
TheOnlyWaytoAssureFoodSafetyandProductQuality
Proper daily maintenance can involve a wide variety of
products and procedures. Overall, the products and pro-
cedures fall into three separate categories. (Please note
that this is a brief overview intended for informational
purposesonly.)
1. CLEANING–Thisinvolvesdrainingmixfromthe
freezing cylinder and rinsing the machine with
water.Next,acleanerisrunthroughthemachine.
Then,themachineisdisassembledandremovable
parts are taken to the sink for cleaning.
2. MILKSTONE REMOVAL – Since most cleaners
donothavetheabilitytoremovemilkstone,theuse
of a delimer becomes necessary. Although this
procedure may not be needed on a daily basis, it
willusuallyfollowthecleaningprocedure.Itrequires
lettingadelimersolutionsoakinthemachineforan
extendedperiod.Individualpartsarealsosoaked
inadelimingsolutionforanextendedperiodoftime
(moreaboutdelimersinAdditionalInformation).
3. SANITIZING–Afterthemachinehasbeencleaned
and contains no milkstone, the machine is
reassembled. Then a FDA-approved sanitizing
solutionisrunthroughthemachinetokillbacteria.
The machine is then ready for food preparation.
As a recommended cleaner and sanitizer for your frozen
dessertmachine,STERA-SHEENhasproventobeoneof
the best daily maintenance products for:
· CLEANING – Thorough removal of all solids
including butterfat and milk fat.
· MILKSTONE REMOVAL – Complete removal of
milkstone.
· SANITIZING – FDA-approved no rinse sanitizer
forfoodcontactsurfaces.
ADDITIONALINFORMATION
THE USE OF DELIMERS
A delimer is a strong acid that has the ability to dissolve
milkstone. This type of chemical may become necessary
once high levels of milkstone have developed. While
these products are very effective for removing HIGH
levels of milkstone, they are not ideal for two reasons:
1. PRODUCTSAFETY–Strongacidsaredangerous
chemicals. Carefully follow safety instructions
providedwithdelimerproducts.
2. MACHINE DAMAGE – Strong acids will attack
metal and rubber causing premature wear of
parts. The use of a delimer needs to be closely
monitored to avoid damage to machine surfaces
and parts.
WithproperdailyuseofSTERA-SHEENoritsequivalent,
there is no need for the use of a DELIMER.
DO NOT USE BLEACH
· BLEACH HAS ABSOLUTELY NO CLEANING
PROPERTIES.
· BLEACH IS CORROSIVE. It will damage
components of the machine causing premature
wearandmetalcorrosion.
GENERALPURPOSECLEANERS
Generalpurposecleanersdonothavetheabilitytoremove
milkstone.Milkstonewillbecomeaproblemifnotremedied
withadditionalproductsandprocedures.
THEUSEOFCHLORINETESTSTRIPS
“Teststrips”areusedtodetermineconcentrationsofactive
chlorineinsanitizingsolutions.Tousethestrips,tearoffa
small portion and submerge it into the sanitizing solution.
Then,comparethecolorchangetothecolorkeyontheside
of the test strip dispenser to determine the approximate
chlorineconcentration.
Theidealconcentrationofchlorineneedstobe100ppm(as
stated by the FDA). NOTE
Followthedirectionsonthecontainerforpropercon-
centration.
Twomain factors contribute tofalling chlorine concentra-
tions in a sanitizing solution.
1. PRODUCTUSE–Asthechlorineinthesolutionis
beingused,chlorineconcentrationsfall.
2. TIME–Astimepasses,smallamountsofchlorine
“evaporate” from the solution. (That is why you
can smell it.)
Sanitizingsolutionsshouldnotbeallowedtofallbelow100
ppm chlorine. New solutions should be mixed once old
solutions become ineffective.

10
3.4 DISASSEMBLY OF MACHINE PARTS
Before using the machine for the first time, complete
machinedisassembly,cleaningandsanitizingprocedures
needtobefollowed.Routinecleaningintervalsandproce-
dures must comply with the local and state health codes.
Inspectionforwornorbrokenpartsshouldbemadeatevery
disassembly of the machine. All worn or broken parts
shouldbereplacedtoensuresafetytoboththeoperatorand
thecustomerandtomaintaingoodmachineperformance
and a quality product. Check the wear line on the auger
flightsonaregularbasis(Fig.3-3)andreplaceasneeded.
Frequency of cleaning must comply with the local health
regulations.
Todisassemblethe machine, refertothe following steps:
A.DISASSEMBLYOFFRONTDOOR
1. TurnthemachineoffbypressingtheMainFreezer
PowerOff/OnbuttonontheIntelliTec2control.
2. Removetheknobsonthefrontdoor.
3. Removethe frontdoor by pullingit off thestuds.
4. Removethespigotthroughthebottomofthefront
door.
5. Remove all o-rings from parts by first wiping off
thelubricationusingacleantowel.Thensqueeze
theo-ringupwardtoformaloop(Fig.3-4).Rollthe
o-ring out of the groove.
B.DISASSEMBLYOFAUGER
1. Removethefrontaugersupportandbushing.
2. Remove the auger assembly from the machine.
Pulltheaugeroutofthemachinebarrelslowly.As
theaugerisbeingpulledout,carefullyremoveeach
of the plastic flights with springs.
3. Keeptherearoftheaugertippeduponceitisclear
of the freezing cylinder to prevent the rear seal
assembly from dropping.
4. Wipethe spline lubricant off of the hex end of the
auger with a paper towel. Remove the rear seal
assembly(Fig. 3-5).
5. Unscrewthespringsfromtheauger flights.
3.5 CLEANING DISASSEMBLED PARTS
Disassembled machine parts require complete cleaning,
sanitizingandairdryingbeforeassembling.Localandstate
health codes will dictate the procedure required. Some
statehealth codesrequire afour sinkprocess (pre-wash,
wash,rinse,sanitize,airdry),whileothers require a three
sink process (without the pre-wash step). The following
proceduresareageneralguidelineonly.Consultyourlocal
andstatehealthcodesfortheproceduresrequiredinyour
location.
A. Preparedetergentwaterbymixing2oz.ofPalmolive
detergentorequivalentin2gallonsof90°to110°F
(32°to43°C)water.Placeallpartsinthedetergent
solutionandcleanwithprovidedbrushes.
B. Rinseallpartswithclean90°to110°F(32°to43°C)
water.
C. Washthehopperandfreezingcylinderwiththe90°
to110°F(32°to43°C)detergentwaterandbrushes
provided(RefertoFigure3-6).
D. Cleantherearsealsurfacesfromtheinsideofthe
freezingcylinderwiththe90°to110°F(32°to43°C)
detergentwater.
Wear Line
Figure 3-3 Auger Flight Wear
Figure 3-4 Removing O-Ring
Figure 3-5 Rear Seal Assembly

11
D. Lubricatethehexdriveendoftheaugerwithasmall
amount of spline lubricant. A small container of
spline lubricant is shipped with the machine.
E. Screw the springs onto the studs in the plastic
flights. The springs must be screwed into the
flightscompletelytoprovidepropercompression.
F. Install the two plastic flights onto the rear of the
auger and insert it part way into the freezing
cylinder.
G. Installtheremainingplasticflights,pushtheauger
intothefreezingcylinderandrotateslowlyuntilthe
augerengagesthedriveshaft.
H. Applyathinlayerofsanitarylubricanttotheinside
and outside of the auger support bushing. Install
thebushingontotheaugersupportandinstallthe
augersupportintothefrontoftheauger.Rotatethe
augersupportsothatonelegofthesupportpoints
straightup.
I. Applyathinlayerofsanitarylubricanttotheo-rings
on the spigot body and install the spigot body
throughthebottomofthefrontdoor.
K. Apply a thin film of sanitary lubricant to the door
sealo-ringandfititintothegrooveontherearofthe
frontdoor.
M. Place the front door assembly on the mounting
studsandthepushfrontdooragainstthemachine
carefully.
N. Securethefrontdoortothemachinebyplacingthe
knobsonthestudsandtighteninguntilfingertight.
Do not overtighten. A proper o-ring seal can be
observedthroughthetransparentfrontdoor.
3.6 SANITIZING MACHINE PARTS
A. UseStera-Sheenorequivalentsanitizingsolution
mixedaccordingtomanufacturer’sinstructionsto
provide a 100 parts per million strength solution.
Mixsanitizerinquantitiesofnolessthan2gallons
of90°to110°F(32°Cto43°C)water.Anysanitizer
must be used only in accordance with the
manufacturer’sinstructions.
B. Place all parts in the sanitizing solution for 5
minutes, then remove and let air dry completely
beforeassemblinginmachine.
3.7 CLEANING THE MACHINE
Theexteriorshouldbekeptcleanatalltimestopreservethe
lusterofthestainlesssteel.Ahighgradeofstainlesssteel
hasbeenusedonthemachinetoeasecleanup.Toremove
spilled or dried mix, wash the exterior with 90° to 110°F
(32°Cto43°C)detergentwaterandwipedry.
Do not use highly abrasive materials, as they will mar the
finish.Amildalkalinecleanerisrecommended.Useasoft
clothorspongetoapplythecleaner.Forbestresults,wipe
with the grain of the steel.
A. Clean the rear seal surface from inside of the
freezingcylinder.
B. Usingsanitizingsolutionandthelargebarrelbrush
provided,sanitizethefreezingcylinderbydipping
the brush in the sanitizing solution and brushing
theinside of the freezing cylinder.
C. Removethedriptraybypullingfromthefrontpanel.
Cleanand replace thedrip tray.
3.8 ASSEMBLING MACHINE
Toassemblethemachineparts,refertothefollowingsteps:
NOTICE
Petrol-Gel sanitary lubricant or equivalent must be
usedwhenlubrication ofmachine parts isspecified.
NOTICE
The United States Department of Agriculture and
the Food and Drug Administration require that lu-
bricants used on food processing equipment be
certified for this use. Use lubricants only in accor-
dance with the manufacturer’s instructions.
A. Assemble all o-rings onto parts dry, without
lubrication. Then apply a thin film of sanitary
lubricant to exposed surfaces of the o-rings.
B. Lubricate the rear seal area on the auger shaft
with a thin layer of sanitary lubricant. Install the
rear seal o-ring. Lubricate the outside of the rear
seal o-ring with sanitary lubricant.
C. Lubricatetheinsidemetalsurfaceoftherearseal
andinstallitontotheaugershaft.DONOTlubricate
theoutside of therear auger seal(Fig. 3-6).
Figure 3-6 Lubricate Rear Seal

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3.9 SANITIZING
Sanitizingmustbedoneafterthemachineiscleanandjust
before the machine is filled with mix. Sanitizing the night
beforeisnoteffective.However,youshouldalwaysclean
the machine and parts after using it.
NOTE
The United States Department of Agriculture and
the Food and Drug Administration require that all
cleaningandsanitizingsolutionsused with food pro-
cessing equipment be certified for this use.
Whensanitizingthe machine, refertolocal sanitary regu-
lationsforapplicablecodesandrecommendedsanitizing
productsandprocedures.Thefrequencyofsanitizingmust
complywithlocalhealthregulations.Mixsanitizeraccord-
ingtomanufacturer’sinstructionstoprovidea100partsper
million strength solution. Mix sanitizer in quantities of no
lessthan2gallonsof90°Fto110°F(32°Cto43°C)water.
Allowsanitizertocontactthesurfacestobesanitizedfor5
minutes. Any sanitizer must be used only in accordance
withthemanufacturer’sinstructions.
A. Prepare 2 gallons of sanitizing solution following
themanufacturer’sinstructions.
B. Install the mix inlet regulator into the hopper.
C. Pour the sanitizing solution into the hopper.
D. Makesurethedisplayshowsthefreezingcylinder
is off. If it is not, press the On/Off Left or On/Off
Right button to turn it off.
NOTE
If the freezing cylinder is not off, the control will not
gointo Clean mode.This isto protect fromacciden-
tallygoing intoClean mode.
E. Press the CLEAN button.
F. Check for leaks.
1. Check for leaks at the front door seals.
2.Checkthedraintraylocatedunderthefrontdoor
for leaks coming from the rear of the rear auger
seal.
G. Usingasanitizedsoftbristlebrush(orequivalent)
dipped in sanitizing solution, clean the hopper
sides, mix inlet regulator and underside of the
hoppercover.
H. Afterfiveminutes,openthespigottoexpelsanitizing
solution.Drainallofthesolutionfromthemachine.
I. Whenthesolutionhasdrained,presstheCLEAN
buttontostoptheauger.Allowthefreezingcylinder
to drain completely.
The machine is now sanitized and ready for adding mix.
3.10 FREEZE DOWN AND OPERATION
A. Sanitizeimmediatelybeforeuse.
B. Makesurethedisplayshowsthefreezingcylinder
is off. If it is not, press the On/Off Left or On/Off
Right button to turn it off.
C. Fill the hopper with at least 2.5 gallons of mix.
D. Place a container under the spigot and open the
spigottoallowthemixtoflushoutabout8ounces
(0.23 liters) of sanitizing solution and liquid mix.
E. Press the On/Off button for the cylinder.
F. Press the PUSH TO FREEZE button.
NOTE
After the drive motor starts, there is a 3-second de-
lay before the compressor starts.
G. When the product is ready, the display will read
“SERVE”. Open the spigot to dispense product.
NOTE
If the product consistency needs to be adjusted,
use the Technician passcode and go to the Basic
Settings menu. Adjust the CutOut Consistency
higher to increase the consistency or lower to de-
creasethe consistency. Makeadjustmentsin incre-
ments of 5 for best results.
H. The machine dispenses product at a reasonable
drawrate.Ifthemachineisoverdrawn,theresultis
a soft product or a product that will not dispense
at all. If this occurs, allow the machine to run for
approximately30secondsbeforedispensingmore
product.Adispenserateadjustorislocatedunder
the header panel, to the immediate right of the
spigothandle.Turningtheknobcounterclockwise
will decrease the dispense rate.
I. Do not operate the machine when the MIX LOW
message is displayed. Refill the mix container
immediately. NOTE
The machine has a standby and sleep mode. After
a preset number of freezing cycles, it will enter the
standbymode(followedbysleepmode) andremain
there until someone draws product or presses the
PUSH TO FREEZE button. In the sleep mode, the
machine will keep the product below 41°F (5°C).
Sleep modes do not take the place of cleaning and
sanitizing.Federal,State,andlocalregulatory agen-
cies determine frequency of cleaning and sanitiz-
ing.

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3.11 MIX INFORMATION
Mix can vary considerably from one manufacturer to an-
other. Differences in the amount of butterfat content and
quantity and quality of other ingredients have a direct
bearingonthefinishedfrozenproduct.Achangeinmachine
performance that cannot be explained by a technical
problem may be related to the mix.
Proper product serving temperature varies from one
manufacturer’s mix to another. Mixes should provide a
satisfactoryproductinthe20°Fto24°Frange.Dietandlow-
carbmixestypicallyfreezetoproperconsistencyathigher
temperatures.
When checking the temperature, stir the thermometer in
the frozen product to get an accurate reading.
Old mix, or mix that has been stored at too high a
temperature,canresultinafinishedproductthatisunsat-
isfactory. To retard bacteria growth in dairy based mixes,
thebeststoragetemperaturerangeisbetween33°to38°F
(0.5° to 3.3° C).

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