Vollrath STOELTING O431 I2 User manual

Model O431I2
OPERATORS MANUAL
Manual No. 513669 Rev.0

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 Description and Specifications
1.1 Description..................................................................................................1
1.2 Specifications .............................................................................................2
2 Installation Instructions
2.1 Safety Precautions .....................................................................................3
2.2 Shipment and Transit..................................................................................3
2.3 Machine Installation....................................................................................3
2.4 Installing Permanent Wiring........................................................................3
2.5 Mix Pump....................................................................................................4
A. Mix Pump Hose Installation..................................................................................4
B. Mix Pickup Hose Installation................................................................................4
C. Mix Low Level Indicator Adjustment.....................................................................6
3 Initial Set-Up and Operation
3.1 Operator’s Safety Precautions ...................................................................7
3.2 Operating Controls and Indicators..............................................................7
3.3 Disassembly of Machine Parts...................................................................8
A. Disassembly of Front Door...................................................................................8
B. Remove Auger .....................................................................................................9
3.4 Cleaning Disassembled Parts ....................................................................9
3.5 Sanitizing Machine Parts............................................................................9
3.6 Cleaning the Machine.................................................................................9
3.7 Assembling the Machine ............................................................................10
3.8 Sanitizing....................................................................................................10
3.9 Freeze Down and Operation ......................................................................11
3.10 Mix Information...........................................................................................12
3.11 Operation of Mix Pump...............................................................................12
3.12 Mix Pump Cleaning ....................................................................................13
3.13 Disassembly and Inspection of Removable Parts......................................13

Section Description Page
4 Maintenance and Adjustments
4.1 Overrun Adjustment....................................................................................15
4.2 Mix Pump Hose Reposition........................................................................15
4.3 Mix Pump Hose Replacement....................................................................16
4.4 Fine Consistency Adjustment.....................................................................16
4.5 Drive Belt Tension Adjustment....................................................................17
4.6 Condenser Cleaning (Air-Cooled Machines)..............................................17
4.7 Preventative Maintenance..........................................................................17
4.8 Extended Storage.......................................................................................17
5 Troubleshooting
5.1 Error Codes................................................................................................19
5.2 Troubleshooting - Error Codes ...................................................................19
5.3 Troubleshooting - Machine.........................................................................21
5.4 Troubleshooting - Mix Pump.......................................................................22
6 Replacement Parts
6.1 Brushes, Decals and Lubrication................................................................31
6.2 Spigot Extension.........................................................................................31
6.3 Auger Shaft and Faceplate Parts ...............................................................32
6.4 Cab Tubing Assembly.................................................................................33

Owner’s Manual #513669 1 O431 I2 Model Machines
1.1 DESCRIPTION
The Stoelting O431 I2 floor model machine is pressure
fed.Themachineisequippedwithfullyautomaticcontrols
to provide a uniform product. The machine is designed
to operate with almost any type of commercial soft-serve
or non-dairy mix available, including ice milk, ice cream,
yogurt, and frozen dietary desserts.
This manual is designed to assist qualified service per-
sonnel and operators in the installation, operation and
maintenance of the Stoelting O431 I2 pressure machine.
SECTION 1
DESCRIPTION AND SPECIFICATIONS
Figure 1-1 Model O431 I2

Owner’s Manual #513669 2 O431 I2 Model Machines
1.2 SPECIFICATIONS
Model O431 I2
Dimensions Machine with crate
width 19-1/8’’ (48,6 cm) 27’’ (68,6 cm)
height 67-7/8’’ (172,4 cm) 78’’ (198,1 cm)
depth 37-3/4’’ (95,9 cm) 48’’ (121,9 cm)
Weight 500 lbs (226,7 kg) 650 lbs (294,8 kg)
Electrical 1 Phase, 208-240 VAC, 60Hz 3 Phase, 208-240 VAC, 60Hz
International Option 1 Phase, 220-240 VAC, 50Hz or 3 Phase, 380-415 VAC, 50Hz
Compressor 15,000 Btu/hr Scroll™ Compressor
Drive Motor Two - 3/4 hp
Air Flow Air cooled units require 3” (7,6 cm) air space on both sides and back.
Plumbing Fittings Water cooled units require 1/2” N.P.T. water and drain fittings.
Hopper Volume Two - 5.5 gallons (20,82 liters)
Freezing Cylinder
Volume Two - 1 gallon (3,79 liters)

Owner’s Manual #513669 3 O431 I2 Model Machines
2.1 SAFETY PRECAUTIONS
Do not attempt to operate the machine until the safety
precautionsand operating instructionsinthis manual are
read completely and are thoroughly understood.
Take notice of all warning labels on the machine. The la-
bels 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
thepartnumber,typeoflabel,locationoflabel,andquantity
required along with your address and mail to:
STOELTING, INC.
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
may have occurred during transit.
With the method of packaging used, the machine should
arriveinexcellentcondition.THECARRIERISRESPON-
SIBLE FOR ALL DAMAGE IN TRANSIT, WHETHER
VISIBLE OR CONCEALED. Do not pay the freight bill
until 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
customer must place a claim for damages and/or short-
ages 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.
Incorrect installation may cause personal injury,
severe damage to the machine and will void fac-
tory warranty.
Installation of the machine involves moving the machine
close to its permanent location, removing all crating, set-
ting in place, assembling parts, and cleaning.
A. Uncrate the machine.
SECTION 2
INSTALLATION INSTRUCTIONS
B. Install the four casters. Turn the threaded end
intothemachineuntilnothreadsareshowing.To
level,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
of freezing cylinder and to insure correct overrun.
D. Machines with air-cooled condensers require 3”
(7,6 cm) air space on both sides and back for
proper circulation.
F. Inair-cooledmachines,useavoltmetertomeasure
incoming voltage. If the supply voltage is 215 or
less, remove the right side panel and move the
voltageselectortoggleswitchtothe208Vposition.
NOTE
Supply voltage must be checked to make sure the
fan motor operates properly.
E. Machines that have a water-cooled condenser
require 1/2” NPT supply and drain fittings.
2.4 INSTALLING PERMANENT WIRING
If permanent wiring is required by local codes, the follow-
ing procedure must be performed:
A. Refer to the nameplate on the side panel of the
machineforspecificelectricalrequirements.Make
sure the power source in the building matches
the nameplate requirements.
NOTE
Three phase machines in areas of unbalanced
electrical loads require special attention when con-
necting input electrical power. The unbalanced leg
of power (called wild or high) must be connected
to L2 in the junction box.
B. Remove the back panel and the junction box
cover located at the bottom of the machine.
C. Install permanent wiring according to local code.
D. Check the auger shaft rotation by pressing the
MainPowerOn/OffbuttonandpressingtheClean
LeftandCleanRightbuttons.Augershaftrotation
is clockwise as viewed through the clear front
door.
E. Press the Clean buttons to stop the augers after
checking the rotation.

Owner’s Manual #513669 4 O431 I2 Model Machines
2.5 MIX PUMP
A. MIX PUMP HOSE INSTALLATION
Follow the steps below to install the mix pump hose in
the cabinet part of the machine.
1. Turn the mix pump on by pressing the Pump On/
Off button on the touchpad.
2. Feed one end of the mix pump hose into the
entering or pickup hose side (left) of black cover
(Fig 2-2). NOTE
Feedthetube into the clampso the naturalcurve of
the tube is towards the outside of the black cover.
This prevents the hose from looping around the
black cover twice.
3. Gently push the hose into the black cover until it
begins to feed.
4. Allow the hose to feed itself through the pump
until about 6” (15cm) remains on the entering
side.
5. Turn the pump off.
6. Connect the mix pump hose to the elbow fitting
(located on the left side of the mix line manifold)
using a small hose clamp. Be careful not to twist
the mix hose.
7. Turn the pump on.
8. Allow the remaining 6” (15cm) of tubing to feed
through pump until the hose adapter prevents
further feeding.
9. Turn the pump off.
CAUTION
Risk of Product Damage
Air/Mix Tee must remain below the black cover
clamp. If the Tee is above the pump, mix may drain
into the air compressor resulting in pump damage.
10. Connect the free end of the mix pump hose to
the 3-way Tee (Fig. 2-3). When all connections
are complete, the 3-way Tee must be lower than
the black pump housing.
B. MIX PICKUP HOSE INSTALLATION
TheO431machinemaybeconnectedtothestandardmix
container or up to three prepacked mix bags. Follow the
instructions below that match your configuration.
Standard Connection:
1. Place the mix pickup assembly through the hole
in the cover and install the retaining clip.
2. Connect a 24” (61cm) length of 3/8” (9,5mm)
ID plastic food grade tubing to the mix pickup
assembly and secure with a hose clamp.
Figure 2-2 Mix Hose Installation
6” (15cm)

Owner’s Manual #513669 5 O431 I2 Model Machines
3. Connect the elbow fitting to the free end of the
tubing. Connect the opposite end of the elbow
to 1/4” ID tan tubing on the left side of the pump
head. Secure with hose clamps (Fig. 2-3).
WhenUsingBagConnectionSystem(BCS)withThree
Bags (optional kit #2183987):
The position of the three bags in the mix container is
important. The bag that is connected nearest the outlet
of the manifold will drain last and should be placed at
the back of the mix container. The mix low level indicator
relies on proper bag placement.
1. Connect3/8”(9,5mm)IDplasticfoodgradetubing
to a bag adapter. Secure with hose clamps.
2. Slide the hose clip over free end of 3/8” (9,5mm)
ID plastic food grade tubing.Attach the free end
of the tubing to a manifold adapter. Secure with
a large hose clamp or equivalent.
3. Push the manifold adapter with spring and valve
into the left port (nearest the manifold outlet) of
themixinletmanifoldandsecurewitharetaining
clip. (Fig. 2-5).
4. Repeat steps 1 to 3 for the middle port and for
the right port of the mix inlet manifold.
5. Place three mix bags into the mix container.
Figure 2-4 BCS Mix Inlet Manifold
Mix Outlet
Drains
Last
Figure 2-3 Mix Pump Connections for Standard Mix Container

Owner’s Manual #513669 6 O431 I2 Model Machines
6. Connectthebagadapterattachedtothe left side
of the manifold (closest to the mix outlet) to the
mix bag in the back of the mix container.
7. Connect the bag adapter attached to the middle
of the manifold to the mix bag in the middle of
the mix container.
8. Connect the bag adapter attached to the right
side of the manifold (farthest from the mix outlet)
to the mix bag in the front of the mix container.
When Using Bag Connection System (BCS) with One
or Two Bags (optional kit #2183987):
When connecting one or two bags, the manifold adapt-
ers must be installed closest to the manifold outlet and
the manifold plug(s) must be placed farthest from the
manifold outlet.
1. Connect3/8”(9,5mm)IDplasticfoodgradetubing
to a bag adapter. Secure with hose clamps.
2. Slidethehoseclipoverthefreeendofthetubing.
Attach the free end of the tubing to a manifold
adapter. Secure with a
large hose clamp.
3. Push the manifold
adapter with spring and
valve into the left port
(nearest the manifold
outlet) of the mix inlet
manifold and secure
with retaining clip. (See
Figure 2-5).
4. If using two mix bags,
repeat steps 1 to 3 for
the middle port.
5. Install a manifold plug
intoeachemptyinletand
secure with a retaining
clip.
6. Placethemixbag(s)into
the mix container.
7. Connectthebagadapter
attached to the left side
of the manifold (closest
to the mix outlet) to the
mix bag in the back of
the mix container.
Figure 2-5 Bag Connection System (Optional)
Bag Adapter
Manifold
Adapter
Retaining
Clip
Mix Inlet
Manifold
Manifold
Plug
C. MIX LOW LEVEL INDICATOR ADJUSTMENT
Thesensitivityofthe“MixLow”indicationcanbeadjusted
tooperatorpreference.Ifmoreadvancednoticeoflowmix
isrequired,loosentheblackadjustmentknobslocatedon
the sensor brackets at the back of the machine cabinet
and slide the bracket upwards. If the “Mix Low” message
appears while there is still sufficient mix in the container,
slidethebracketdownward.Besuretotightentheadjust-
ment knobs after properly positioning the sensor.

Owner’s Manual #513669 7 O431 I2 Model Machines
3.1 OPERATOR’S SAFETY PRECAUTIONS
SAFE OPERATION IS NO ACCIDENT; observe these
rules:
A. Know the machine. Read and understand the
Operating Instructions.
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. Disconnect power for maintenance. Never
attempt to repair or perform maintenance on the
machineuntilthemain electricalpowerhasbeen
disconnected.
G. Donotoperateunderunsafeoperatingconditions.
Neveroperatethemachineifunusualorexcessive
noise or vibration occurs.
SECTION 3
INITIAL SET-UP AND OPERATION
3.2 OPERATING CONTROLS AND
INDICATORS
Before operating the machine, it is required that the op-
erator know the function of each operating control. Refer
to Figure 3-1 for the location of the operating controls on
the machine. For the information regarding error codes
displayedonthecontrolpanel,refertothetroubleshooting
section of this manual.
Figure 3-1 Machine Controls
IntelliTec2™ Control
(See Figure 3-2)
Dispense
RateAdjustor
WARNING
Highvoltage will shock, burn orcause death. Make
sure the display shows the freezing cylinders and
pumpareoff.Iftheyare not, press theOn/Offbutton
and Pump button to turn them off prior to disas-
sembling for cleaning or servicing. Do not operate
machine with panels removed.

Owner’s Manual #513669 8 O431 I2 Model Machines
A. INTELLITEC2™ TOUCHPAD
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 plugged in, the control defaults to the On status with
powertothecabinetonly.IftheMainPowerOn/Offbutton
is pressed when the machine is on, the machine will turn
offand a status messagewill be displayedon the 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.
Selection Button (SEL)
The SEL button is used by service technicians to select
menu options.
Set Button (SET)
The SET button is used by service technicians to save
changes when modifying control settings.
On/Off Button
Power to the freezing cylinders can then be controlled
with the On/Off Left and On/Off Right buttons.
Push to Freeze Button
Pressing the PUSH TO FREEZE button initiates “Serve
Mode”.
Clean Button
The CLEAN button initiates “Clean Mode”.
Pump Button
The PUMP On/Off buttons control power to the pump.
NOTE
If the setting for the pump is automatic, the Pump
On/Off buttons will not operate the pump and the
display will show the pumps set to automatic.
Arrow Buttons ()
The arrow buttons are used by service technicians to
navigate through the control readings and settings.
B. SPIGOT SWITCH
Thespigotswitchismountedtothespigotcamassembly
behind the header panel. When the spigot is opened to
dispenseproduct,thespigotswitchopensandthe“Serve
Mode” begins.
C. DISPENSE RATE ADJUSTOR
The dispense rate adjustor is located under the header
panel,totheimmediaterightofthespigothandles.Turning
theknobcounterclockwisewilldecreasethedispenserate.
3.3 DISASSEMBLY OF MACHINE PARTS
Before using the machine for the first time, complete
machine disassembly, cleaning and sanitizing proce-
dures need to be followed. Routine cleaning intervals
and procedures must comply with the local and state
health codes. Inspection for worn or broken parts should
be made at every disassembly of the machine. All worn
or broken parts should be replaced to ensure safety to
boththe operator and thecustomer and tomaintain good
machine performance and a quality product. Check the
wear line on the auger flights on a regular basis (Fig.
3-3) and replace as needed. Frequency of cleaning must
comply with the local health regulations.
To disassemble the machine, refer to the following steps:
A. DISASSEMBLY OF FRONT DOOR
1. Remove the knobs on the front door and remove
the door by pulling it off the studs.
2. Remove the air bleed valve by unscrewing the
knob while holding the valve stem from behind.
Remove the compression spring and push the
air bleed valve through the rear of the front door.
Figure 3-2 IntelliTec2™ Control
Figure 3-3 Auger Flight Wear
Wear Line

Owner’s Manual #513669 9 O431 I2 Model Machines
3. Remove the spigots through the bottom of the
front door.
6. Remove all o-rings from parts by first wiping off
thelubricationusingacleantowel.Thensqueeze
the o-ring upward to form a loop (Fig. 3-4). Roll
the o-ring out of the groove.
CAUTION
Do not use any type of sharp object to remove the
o-rings.
B. REMOVE AUGER
1. Remove the front auger support and bushing.
2. Remove the auger assembly from the machine.
Pull the auger out of the machine barrel slowly.
Astheaugerisbeingpulledout,carefullyremove
each of the plastic flights with springs.
3. Keep the rear of the auger tipped up once it is
clear of the freezing cylinder to prevent the rear
seal assembly from dropping.
4. Wipethe spline lubricantoffof thehexend of the
auger with a paper towel. Remove the rear seal
assembly (Fig. 3-5).
5. Unscrew the springs from the auger flights.
3.4 CLEANING DISASSEMBLED PARTS
Disassembled parts require complete cleaning, sanitiz-
ing and air drying before assembling. Local and state
health codes will dictate the procedure required. Some
statehealthcodes require a foursink process (pre-wash,
wash,rinse, sanitize, airdry),whileothersrequire a three
sink process (without the pre-wash step). The following
procedures are a general guideline only. Consult your
local and state health codes for the procedures required
in your location.
A. Disassemble all parts. (Refer to Section 3.4 for
the disassembly of machine parts.)
B. Placeallfrontdoorandaugerpartsinclean90°to
110°F(32°Cto43°C)waterandwashthoroughly
(four sink procedure only).
C. Placeallpartsin90°to110°F(32°Cto43°C)mild
detergent water and wash thoroughly.
D. Rinse all parts with clean 90° to 110°F (32°C to
43°C) water.
E. Sanitize all machine parts following procedures
outlined below.
3.5 SANITIZING MACHINE PARTS
A. Useasanitizer,mixedaccordingtomanufacturer’s
instructions, to provide a 100 parts per million
strength solution. Mix sanitizer in quantities of
no less than 2 gallons of 90° to 110°F (32°C to
43°C) water. Any sanitizer must be used only in
accordancewiththemanufacturer’sinstructions.
B. Place all parts in the sanitizing solution for 5
minutes, then remove and let air dry completely
before assembling in machine.
3.6 CLEANING THE MACHINE
The exterior should be kept clean at all times to preserve
the luster of the stainless steel.Ahigh grade of stainless
steel has been used on the machine to ease cleanup. To
remove spilled or dried mix, wash the exterior with 90° to
110°F (32°C to 43°C) soapy water and wipe dry.
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 surfaces on the inside of the
freezing cylinders.
B. Using sanitizing solution and the large barrel
brushprovided,sanitizethefreezingcylindersby
dipping the brush in the sanitizing solution and
brushing the inside of the freezing cylinders.
C. Removethedriptraysfromthefrontpanel.Clean
and replace the drip tray.
Figure 3-4 Removing O-Ring
Figure 3-5 Rear Seal Assembly
Remove O-Ring
From Inside Insert

Owner’s Manual #513669 10 O431 I2 Model Machines
3.7 ASSEMBLING THE MACHINE
Toassemblethemachineparts,refertothefollowingsteps:
NOTICE
Petrol-Gel sanitary lubricant or equivalent must be
usedwhenlubricationofmachinepartsisspecified.
NOTICE
The United States Department of Agriculture and
theFoodandDrugAdministrationrequirethat lubri-
cants used on food processing equipment be certi-
fied for this use. Use lubricants only in accordance
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. Install the rear seal o-ring. Lubricate the outside
of the rear seal o-ring with sanitary lubricant.
C. Install the stainless steel rear seal adapter into
therearsealdry(withoutlubricant).Lubricatethe
inside surface of the rear seal adapter, including
the adapter o-ring, and install it onto the auger
shaft. DO NOT lubricate the outside of the rear
auger seal (Fig. 3-6).
D. Lubricate the hex drive end of the auger with a
smallamountofsplinelubricant.Asmallcontainer
of 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
into the freezing cylinder and rotate slowly until
the auger engages the drive shaft.
H. Applyathinlayerofsanitarylubricanttotheinside
and outside of the auger support bushing. Install
thebushingontotheaugersupportandinstallthe
auger support into the front of the auger. Rotate
the auger support so that one leg of the support
points straight up.
I. Assemble the air bleed valve o-ring onto the air
bleed valve. Position the o-ring into the groove
closetothewidepart.Applyathinfilmofsanitary
lubricant to the o-ring.
J. Inserttheairbleedvalveinto thebackofthefront
door. Install the compression spring onto the air
bleed valve then screw the knob on finger tight.
K. Applyathinlayerofsanitarylubricanttotheo-rings
onthe spigot bodies and installthe spigotbodies
through the bottom of the front door.
L. Fit the front door o-ring into the groove on the
rear of the front door.
M. Place the front door assembly on the mounting
studsandthepushfrontdooragainstthemachine
carefully.
N. Secure the front door to the machine by placing
the knobs on the studs and tightening until finger
tight. Do not overtighten. Proper o-ring seal can
be observed through the transparent front door.
3.8 SANITIZING
Sanitizing must be done after the machine is clean and
just before the machine is filled with mix. Sanitizing the
night before is not effective. However, you should always
clean the machine and parts after using it.
NOTE
The United States Department of Agriculture and
the Food and Drug Administration require that all
cleaning and sanitizing solutions used with food
processing equipment be certified for this use.
Figure 3-6 Rear Seal Assembly
Spline
Lubricant
Petrol-Gel Place O-Ring
Inside Insert
Figure 3-7 Front Door

Owner’s Manual #513669 11 O431 I2 Model Machines
Whensanitizingthemachine, refer to local sanitary regu-
lationsforapplicablecodesandrecommendedsanitizing
products and procedures. The frequency of sanitizing
must comply with local health regulations. Mix sanitizer
accordingtomanufacturer’s instructions to provide a 100
partspermillion strength solution. Mixsanitizer in quanti-
ties of no less than 2 gallons of 90°F to 110°F (32°C to
43°C) water.Allow sanitizer to contact the surfaces to be
sanitized for 5 minutes. Any sanitizer must be used only
in accordance with the manufacturer’s instructions.
CAUTION
Risk of Product Damage
Avoid prolonged contact of sanitizer with machine
parts. Sanitizer may cause corrosion of stainless
steel parts if there is prolonged contact.
A. Prepare 2 gallons of sanitizing solution following
the manufacturer’s instructions and pour it into
the storage container. Put the mix pick-up tube
in the sanitizer.
B. 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 go into Clean mode. This is to protect from ac-
cidentally going into Clean mode.
C. Press the Pump button to turn the pump ON
and open the air bleed valve on the front door
by pushing the valve in and holding (see Figure
3-8).
D. Let sanitizing solution fill the freezing cylinder to
the air bleed valve. Close the valve by pulling it
out to lock it into place.
E. PresstheCLEANbuttontostarttheaugerrotating.
F. Checkforleakswhenthe freezingcylinderisfirst
pressurized with sanitizing solution.
1. Check for leaks at the front door seals.
2. Check the drain tray located in the front panel
for leaks coming from the rear of the rear auger
seal.
3. Check the inside of the cab unit for leaks at
the hose connections.
G. Use a sanitized soft bristle brush dipped in
sanitizing solution to clean the mix container.
H. After five minutes, open the spigot to drain the
sanitizing solution.
I. When the solution has drained, press the Pump
and Clean buttons to stop the pump and auger.
Allow the freezing cylinder to drain completely.
The machine is now sanitized and ready for adding mix.
3.9 FREEZE DOWN AND OPERATION
Refer to the following procedures to operate both freez-
ing cylinders.
A. Sanitize immediately before use.
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 storage containers with at least 3 gallons
of mix.
D. Attach the mix inlet probe to the container and
place the container in the refrigerated cab.
E. Press the Pump button to turn the pump on.
F. Place a container under the spigot and open the
spigottoallowthemixtoflushoutabout8ounces
(0.23 liters) of sanitizing solution and liquid mix.
Close the spigot.
G. Open the air bleed valve on the front door by
pressing and holding. Hold the valve open until
the mix level in the freezing cylinder is 1/2” from
the air bleed valve.
H. Press the On/Off button for the cylinder.
I. Press the PUSH TO FREEZE button.
NOTE
After the drive motor starts, there is a 5-second
delay before the compressor starts.
Figure 3-8 Air Bleed Valve
Air Bleed
Valve

Owner’s Manual #513669 12 O431 I2 Model Machines
J. When the product is ready, the display will read
“SERVE”. Open the spigot to dispense product.
NOTE
Iftheproductconsistency needs to be adjusted, use
the Technician passcode and go to the Basic Set-
tings menu. Adjust the CutOut Consistency higher
to increase the consistency or lower to decrease
the consistency. Make adjustments in increments
of 5 for best results.
K. The machine dispenses product at a reasonable
drawrate.Ifthemachineisoverdrawn,theresult
isasoftproductoraproductthatwillnotdispense
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.
L. Do not operate the machine when the MIX LOW
message is displayed. Refill the mix container
immediately. NOTE
The control has a standby mode for Serve 1 and a
sleep mode for Serve 1 and Serve 2.After a preset
numberoffreezingcyclesinServe1,thecontrolwill
enter the standby mode (followed by sleep mode)
and remain there until someone draws product or
presses the PUSH TO FREEZE button. In Serve 2
the control directly goes into the Sleep2 mode. 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,
andlocal regulatory agencies determinefrequency
of cleaning and sanitizing.
3.10 MIX INFORMATION
Mix can vary considerably from one manufacturer to
another. Differences in the amount of butterfat content
and quantity and quality of other ingredients have a
direct bearing on the finished frozen product. A change
in machine 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
satisfactory product in the 20°F to 24°F range. Diet and
low-carb mixes typically freeze to proper consistency at
higher temperatures.
When checking the temperature, stir the thermometer in
the frozen product to get an accurate reading.
Oldmix,ormixthathasbeenstoredattoohighatempera-
ture,canresultinafinishedproductthatisunsatisfactory.
To retard bacteria growth in dairy based mixes, the best
storage temperature range is between 33° to 38°F (0.5°
to 3.3° C).
3.11 OPERATION OF MIX PUMP
The mix pumps are operated from the buttons on the
IntelliTec2™touchpad.Whenthepumpbuttonispressed
On, the mix pump motor will start pumping mix into the
freezing cylinder. When the set pressure is reached, the
mix pump will shut off automatically.
NOTE
The mix pump motor is equipped with an internal
overload that will “trip”, disabling the pump when
the motor is overloaded. Consult the troubleshoot-
ing section for corrective information. The internal
overload will automatically reset after cooling. If
the condition continues, contact a qualified service
person.
A. MixOperation:Theperistalticmixpumpcontains
onecontinuousmix pump hose.Whenlookingat
the face of the peristaltic mix pump, the left side
of the hose is the mix intake or pickup. The right
sideofthehoseisthemixdischarge.Mixisdrawn
up the pickup side of the hose and transferred
through the discharge side to the machine (Fig.
3-9).
B. Air Operation: The air compressor operates
whenever the peristaltic mix pump is running.
Air enters through a check valve on the piston
downstroke. The air is discharged through a
second check valve, on the piston upstroke. The
air and mix join at the tee and then travel to the
machine.
C. The overrun adjustment is preset at the factory.
If an adjustment becomes necessary, refer to
Section 4.
Figure 3-9 Mix Pump Hose Routing
Air Line
Mix
Intake Mix
Discharge
3-way
Tee
Air/mix to
Freezing
Cylinder

Owner’s Manual #513669 13 O431 I2 Model Machines
3.12 MIX PUMP CLEANING
NOTICE
Any cleaning procedure must always be followed
by sanitizing before filling machine with mix.
The mix pump is approved for CIP (clean in place). It is
thoroughlycleanedwhenthecleaningsolutionispumped
through the machine. We recommend completely disas-
sembling the pump and disconnecting tubing every 14
days for inspection of parts to confirm the CIP has been
properly performed. If any residue is detected, clean or
replace those parts as outlined below.
A. With the machine filled with mix, press the Clean
button. Allow the auger to agitate for 5 to 10
minutes.
B. Remove the suction tube from the mix container.
Open the spigot to remove the mix remaining in
the freezing cylinder.
C. Pump2gallons(7.5liters)ofpotablewaterthrough
machine until the water coming out of the spigot
is clear.
D. Pump 2 gallons (7.5 liters) of 90° to 110°F (32°C
to 43°C) cleaning solution through the machine.
E. PressthePumpbuttontoturnthepumpOff.Open
the spigot to relieve the remaining pressure.
F. PresstheCleanbutton tostopthecleaning cycle
and press the On/Off button for the cylinder to
turn it Off.
3.13 DISASSEMBLY AND INSPECTION OF
REMOVABLE PARTS
Inspectionofremovablepartsshould be made whenever
maintenance is performed or when the pump requires
disassembly. NOTE
If the mix line or air line is difficult to remove, soften
the tubing with a rag soaked in hot water. Hose
connections may be sprayed with Haynes Sanitary
Lubricant for ease of removal.
WARNING
Hazardous Moving Parts
Revolvingpumpheadcan grab, mangle, and cause
serious crushing injury. Make sure the display
shows the freezing cylinders and pump are off. If
they are not, press the On/Off button and Pump
button to turn them off.
CAUTION
System Under Pressure
Never disconnect hoses from the machine or the
pump without first opening the spigot to relieve
pressure.
A. Loosen the clamp and remove the air hose from
the pump compressor.
B. Loosen the clamp and disconnect the mix pump
hose. Remove the pickup hose, and the mix
pickup assembly from the mix container.
C. Completelydisassemblethe hose assembly and
the check valve (Fig. 3-10). Place hoses, tee,
checkvalveassembly,andpickuphoseadapterin
90°to110°F (32°C to 43°C)milddetergentwater
and wash thoroughly. Use soft bristle brushes to
clean inside of fittings. Rinse all parts in clean
90° to 110°F (32°C to 43°C) water.
D. Carefully inspect each part for wear or damage.
Replace worn or damaged parts.
E. Wash the mixtube and theair tubein thecabinet
with 90° to 110°F detergent water and brushes
provided. Rinse with clean, 90° to 110°F water.
F. Prepare two gallons (7.5 liters) of sanitizing
solution using a USDA certified grade sanitizing
solution. Sanitize all removed parts. Allow them
to air dry.
G. Reassemble both hose assemblies per the
diagram located on the inside of the cab door.
Reconnecttheassembliestothepumphoseand
the discharge hose, using the clamps. (Refer to
Section 2.5 Mix Pump).
H. Sanitize assembled machine as per instructions
outlined in Section 3.11.
Figure 3-10 Mix Pump Removable Parts

Owner’s Manual #513669 14 O431 I2 Model Machines