Vollrath Stoelting E131-OT2 User manual

Model E131-OT2 / F131-OT2
SERVICE MANUAL
Manual No. 513648 Rev.0
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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 NOT ATTEMPT 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
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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.
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Section Description Page
1 Description and Specifications
1.1 Description .................................................................................................1
1.2 Specifications .............................................................................................1
1.3 Modes ofNormal Operation ........................................................................4
1.4 Mix LevelIndicators ....................................................................................6
1.5 HopperRefrigeration ...................................................................................6
1.7 Motor ProfileCutout Compensation ............................................................6
2 Installation Instructions
2.1 Safety Precautions .....................................................................................9
2.2 Shipmentand Transit .................................................................................9
2.3 MachineInstallation ....................................................................................9
3 Initial Set-Up and Operation
3.1 Operator’s SafetyPrecautions ....................................................................11
3.2 Operating ControlsandIndicators ...............................................................11
3.3 Important InformationRegarding Cleaning andSanitizing ............................13
3.4 Disassembly of Machine Parts ...................................................................14
3.5 CleaningDisassembled Parts .....................................................................15
3.6 Sanitizing Machine Parts............................................................................15
3.7 Cleaning theMachine .................................................................................15
3.8 Assembling the Machine ............................................................................16
3.9 Sanitizing ...................................................................................................16
3.10 InitialFreeze Down and Operation ..............................................................17
3.11 NormalFreeze DownandOperation ...........................................................18
3.12 MixInformation ...........................................................................................18
4 Maintenance and Adjustments
4.1 MachineAdjustment...................................................................................19
4.2 Product Consistency Adjustment ...............................................................19
4.3 Locking the Control Panel...........................................................................19
4.4 Obtaining Readings and Modifying Settings ................................................19
4.5 Readings ....................................................................................................21
4.6 Adjustments ...............................................................................................22
4.7 Other Settings ............................................................................................22
4.8 Drive Belt Tension Adjustment ....................................................................23
4.9 CondenserCleaning ...................................................................................23
4.10 PreventativeMaintenance ...........................................................................24
4.11 ExtendedStorage.......................................................................................24
TABLE OF
CONTENTS
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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. Check Valve.........................................................................................................29
C. High Pressure Cutout .........................................................................................29
D. Hot Gas Bypass ..................................................................................................30
E. Evaporator Pressure Regulator (EPR) ...............................................................31
F. Water Valve (Water Cooled Models Only) ...........................................................31
5.7 Solenoid .....................................................................................................32
5.8 Filter Drier ..................................................................................................34
5.9 CapillaryTube ............................................................................................34
6 Electrical and Mechanical Control Systems
6.1 IntelliTecController .....................................................................................35
6.2 Contactors..................................................................................................35
6.3 DriveMotor .................................................................................................36
6.4 Capacitors ..................................................................................................37
6.5 Gearbox .....................................................................................................38
6.6 Condenser Fan Motor (Air Cooled Models Only) .........................................38
6.7 Spigot Switch .............................................................................................39
6.8 TemperatureControl Sensor .......................................................................40
7 Troubleshooting
7.1 ErrorCodes ................................................................................................41
7.2 Troubleshooting ..........................................................................................41
7.3 ServicingTip ...............................................................................................43
7.4 Troubleshooting- Machine ..........................................................................44
8 Replacement Parts
8.1 Decals & Lubrication ..................................................................................45
8.2 Auger Shaft and Faceplate Parts ................................................................46
8.3 Machine Front ............................................................................................48
8.4 Panels ........................................................................................................48
8.5 Left Side .....................................................................................................49
8.6 Right Side ..................................................................................................50
8.7 Front ..........................................................................................................50
8.8 Rear ...........................................................................................................52
8.9 Refrigeration Diagram& Wiring Diagram .....................................................54
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1
SECTION 1
INTRODUCTION
1.1 DESCRIPTION
The Stoelting E131OT2 and F131OT2 counter machines
are gravity fed. The machines are equipped with fully
automatic controls to provide a uniform product. They are
designed to operate with almost any type of commercial
softserve or non-dairymixes available, including:ice milk,
ice cream, yogurt, and frozen dietary desserts.
Thismanual isdesigned to assistqualified serviceperson-
neland operatorsinthe installation,operation and mainte-
nance of the Stoelting E131OT2 and F131OT2 gravity
machine.
Figure 1-2 Specification
1.2 SPECIFICATIONS
Figure 1-1 E131OT2 / F131OT2 Machine
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1.2 E131I SPECIFICATIONS
* CutOut amps must be set on site.
**The Refrigersetting ontherightcontrolboard
must be set to None.
Dimensions
width
height
depth
Weight
Electrical
running amps
connection type
International Option
Compressor
Drive Motor
Air Flow
Plumbing Fittings
Hopper Volume
Freezing Cylinder
Volume
Production
Capacity
1 Phase, 220-240 VAC, 50Hz
5 GPH (18,93 liters) each Freezing Cylinder
8.5 GPH (32,18 liters) both Freezing Cylinders
with crate
28'' (71,1 cm)
40-1/4'' (102,2 cm)
35-1/4'' (89,5 cm)
450 lbs (204,1 kg)370 lbs (167,8 kg)
1 Phase, 208-230 VAC, 60Hz
approximately 12A
NEMA6-20P power cord provided
Model E131OT2
28-1/2'' (72,4 cm)
34-3/4'' (88,3 cm)
22'' (55,9 cm)
Machine
Two - 0.5 gallon (2 quart), 1,89 liters
8,600 Btu/hr (R-404A)
Two - 3/4 hp
Air cooled units require 3" (7,6 cm) air space on both sides
Two - 3 gallon (11,35 liters)
Water cooled units require 3/8" N.P.T. water and drain fittings.
E131OT2
Refrigerant R-404A
Charge (W/C) 26 oz
(A/C) 32 oz
Suction Pressure
(at 72°F)
One Cylinder 22-24 psig
Hopper Only 14 psig
Discharge Pressure 225-235 psig
Hot Gas Bypass
Pressure 14 psig (only hopper running)
EPR Valve 59-61 psig
Menu Display Value
Basic CutOut * amps
Cut In T 22 °F
Cycles 20 count
Stir On 15 seconds
Stir Off 300 seconds
Advanced On Time 25 seconds
Off Time 450 seconds
Stb Time 120 minutes
Sl1DrvOn 120 seconds
Sl1DrOff 180 seconds
Sl2CutIn 35 °F
Sl2CtOut 30 °F
DftOffTm 600 seconds
Storage Refriger ** 2 Hopper
(Left HprCutIn 37.5 °F
control HprCtOut 32 °F
only) HprOffst 8 °F
Hpr Off 13 minutes
Hpr On 130 seconds
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* CutOut amps must be set on site.
**The Refrigersetting ontherightcontrolboard
must be set to None.
1.2 F131I SPECIFICATIONS
Dimensions
width
height
depth
Weight
Electrical
running amps
connection type
International Option
Compressor
Drive Motor
Air Flow
Plumbing Fittings
Hopper Volume
Freezing Cylinder
Volume
Production
Capacity
1 Phase, 220-240 VAC, 50Hz
Two - 0.85 gallon (3.4 quart), 3,22 liters
12,000 Btu/hr (R-404A)
Two - 3/4 hp
Air cooled units require 3" (7,6 cm) air space on both sides
Two - 3 gallon (11,35 liters)
Water cooled units require 3/8" N.P.T. water and drain fittings.
Model F131OT2
28-1/2'' (72,4 cm)
34-3/4'' (88,3 cm)
22'' (55,9 cm)
Machine
8 GPH (30,29 liters) each Freezing Cylinder
11.5 GPH (43,53 liters) both Freezing Cylinders
with crate
28'' (71,1 cm)
40-1/4'' (102,2 cm)
35-1/4'' (89,5 cm)
470 lbs (213,1 kg)385 lbs (174,6 kg)
1 Phase, 208-230 VAC, 60Hz
approximately 12A
NEMA6-20P power cord provided
F131OT2
Refrigerant R-404A
Charge (W/C) 32 oz
(A/C) 42 oz
Suction Pressure
(at 72°F)
One Cylinder 22-24 psig
Hopper Only 14 psig
Discharge Pressure 225-235 psig
Hot Gas Bypass
Pressure 14 psig (only hopper running)
EPR Valve 59-61 psig
Menu Display Value
Basic CutOut * amps
Cut In T 22 °F
Cycles 20 count
Stir On 15 seconds
Stir Off 300 seconds
Advanced On Time 15 seconds
Off Time 450 seconds
Stb Time 120 minutes
Sl1DrvOn 120 seconds
Sl1DrOff 180 seconds
Sl2CutIn 33 °F
Sl2CtOut 30.5 °F
DftOffTm 600 seconds
Storage Refriger ** 2 Hopper
(Left HprCutIn 37.5 °F
control HprCtOut 32 °F
only) HprOffst 8 °F
Hpr Off 13 minutes
Hpr On 130 seconds
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1.3 MODES OF NORMAL OPERATION
Following are details of the operational modes of the
IntelliTeccontrol.
NOTE:
The preset amounts, times, and temperatures listed
below are references to actual settings on the
IntelliTec control. Refer to Table 1-1 on page 7 for
details on each setting.
A. INITIAL STATUS
When the Main Freezer Power and Freezing Cylinder
switches are placed in the ON position, the machine will
start in the “Sleep 1 Mode". The display will read "Sleep 1
Mode". The control will eventually move into the “Sleep 2”
mode if the PUSH TO FREEZE button is not pressed.
Whenthe PUSHTO FREEZEbutton ispressed thecontrol
will move to the “Serve Mode”.
B. SERVE MODE
Whenthe PUSHTOFREEZE buttonis pressed ora spigot
handleis pulled,the “Serve Mode”begins. Thedrive motor
starts, and after a 3 second delay, the compressor starts.
Thedisplay reads“FREEZING” onthe toplineand abar on
the bottom line increases with product consistency. A
toroid on the IntelliTec control senses increasing drive
motor amperage as the product comes to consistency in
thefreezing cylinder.Whenthe controlsenses the product
is at 75% of consistency, the display will read "SERVE",
the amber LED will go out, and the green LED will flash. At
this time, product can be served from the machine. The
drive motor and compressor will continue to run until the
toroidreadsapresetvalue (CutOutamps). Whenthetoroid
readsthe CutOutamps onthe drivemotor, thecompressor
turns off and the green LED will remain lit. After a 3 second
delay,the drive motor turnsoff. The product inthefreezing
cylinder is now at serving temperature and consistency.
After product is at consistency, the IntelliTec control
continuously monitors refrigerant temperature through a
thermistor mounted on the side of the freezing cylinder.
When the temperature increases to a preset amount (Cut
In T), a 3-second drive motor pre-stir analyzes product
consistency. The pre-stir check is also performed each
timethespigot handleisopened. Thischeckpreventsover-
freezing of product, especially during frequent, small vol-
ume draws. If the product requires a freezing cycle, the
control will start the cycle.
During the “Serve Mode”, a stir cycle starts. This cycle is
independent of the freezing cycle and is based on preset
times(Stir On and StirOff). The stir cycleprevents product
separation.If a freezing cycleisinitiated, the timer isreset.
In addition to the "Serve Mode" freezing cycle, there is a
freezing cycle based on a preset time (DftOffTime). If this
time is attained without a freezing cycle, the control will
automatically start a freezing cycle.
The machine will remain in “Serve Mode” until the cycle
count setting is attained. The cycle count is the number of
active freezing cycles and is based on a preset value
(Cycles). Once the cycle count has been reached without
user interruption, the control will move into the "Standby
Mode".
If the PUSH TO FREEZE button is pressed or a spigot
handleis pulled,thecycle countis reset andthe controlwill
moveto thebeginning ofthe "ServeMode". Refer toFigure
1-3 for a graphical representation of the "Serve Mode".
C. STANDBY MODE
Ifno producthasbeen drawnfrom thespigot andthe preset
number of active freezing cycles is met, the control moves
into the “Standby Mode”. In "Standby Mode", the freezing
cycleisbasedonpresettimers(On TimeandOff Time),and
prevents ice crystals from building up in the product.
Becausethe productremains partiallyfrozen,itcanquickly
returntoservableconsistencywhenthePUSH TOFREEZE
button is pressed.
During “Standby Mode”, the stir cycle runs. This cycle is
based on preset, timed intervals (Stir On and Stir Off) and
preventsproduct separation.
The"Standby Mode"maintains productquality duringslow
times, while minimizing reactivation time. This mode lasts
for a preset time (Stb Time). Once this time has been
reached without user interruption, the control moves into
Figure 1-3 Serve Mode
Figure 1-4 Standby Mode
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the "Sleep 1 Mode". Refer to Figure 1-4 for a graphical
representation of the "Standby Mode".
If a spigot is opened or the PUSH TO FREEZE button is
pressed, the control will move to “Serve Mode”. Product in
the front of the freezing cylinders may or may not be at
consistency. The state of the product is dependant on a
number of variables but will come to consistency quickly.
D. SLEEP 1 MODE
After the “Standby Mode” time has expired without user
interruption, the control will move into the “Sleep 1 Mode”.
During the "Sleep 1 Mode", the stir cycle is handled by
presettimers(Sl1DrvOn andSl1DrOff), andallows product
to melt to a liquid state by using agitation cycles without
any flow of refrigerant. Although the product temperature
never increases above 40°F, the product thaws rapidly
which minimizes product breakdown. The control will stay
in the “Sleep 1 Mode” until sensing a preset temperature
(Sl2CutIn). When this temperature has been reached
withoutuser interruption,thecontrol willmove tothe "Sleep
2Mode". Refer toFigure 1-5fora graphicalrepresentation
of the "Sleep 1 Mode".
If a spigot is opened or the PUSH TO FREEZE button is
pressed,the controlwill moveto“ServeMode”.Ifthespigot
is opened in "Sleep 1 Mode", the product will not be at
consistency. The operator must wait until the first "Serve
Mode" freezing cycle has completed to serve product.
E. SLEEP 2 MODE
The “Sleep 2 Mode” maintains the freezing cylinder tem-
peraturebetweentwopresetvalues(Sl2CutInandSl2CtOut).
During the “Sleep 2 Mode”, the stir cycle runs. This cycle
isbased onpreset,timedintervals(Stir Onand StirOff) and
prevents product separation. The "Sleep 2 Mode" is often
referred to by customers as the “night mode” and the
machine will stay in this mode until a spigot is opened or
the PUSH TO FREEZE button is pressed. When this
occurs, the control will move to “Serve Mode”. If the spigot
is opened at this time, the product will be liquid. The
operator must wait until the first "Serve Mode" freezing
cycle has completed to serve product. Refer to Figure 1-6
for a graphical representation of the "Sleep 2 Mode".
F. INTELLITEC RESTART (VERSION 3.5 OR HIGHER)
If a hard error occurs (refer the hard error list below), the
IntelliTec control will wait 5 minutes then attempt to clear
the error by restarting itself. The control will count each
restart attempt. The restart count will reset if the PUSH TO
FREEZE button is pressed, the spigot is pulled, or the
Freezing Cylinder OFF/ON switch is placed in the OFF
position.
Thefollowing areconsideredhard errors:
ERRORCODE MALFUNCTION
2 HighTorque
3 RunTime
4 Clean
7 DriveMotor
9 High Pressure Cutout
When a restart occurs, the second line of the display will
read "Restart" and the backlight will blink. This will occur
regardless of the system mode.
G. SLEEP 3 MODE (VERSION 3.5 OR HIGHER)
If a high torque, run time, or drive motor error condition
occurs on the third restart attempt, the control will move to
the "Sleep 3 Mode".
In"Sleep 3Mode" freezing cylinderrefrigeration willrun for
4 seconds every 10 minutes. This ensures the product
temperature never increases above 40°F. The stir cycle
and the auger do not run during "Sleep 3 Mode".
The control will exit "Sleep 3 Mode" if the PUSH TO
FREEZE button is pressed, the spigot is pulled, or the
Freezing Cylinder OFF/ON switch is placed in the OFF
position.
H. CLEAN MODE
When the CLEAN button is pressed on the left side, all
hopper refrigeration stops. When the CLEAN button is
pressedontherightside, onlythe rightbarrelfreezingcycle
stops.Ineither case,thedrive motorofthatbarrelstarts and
will run for 20 minutes and a 5 minute countdown timer is
displayed. After the time has elapsed, an optional audible
alarm will sound if this accessory has been installed. The
Figure 1-5 Sleep 1 Mode
Figure 1-6 Sleep 2 Mode
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controlwill run themachine on timersfor the freezingcycle
orhopperrefrigeration. Thisallows theoperatorto continue
toserveproductfrom themachineuntil properservicingcan
be completed.
A. SERVE AND STANDBY MODE
In the event of a temperature sensor failure on a freezing
cylinder, the IntelliTec control will function in two modes,
"ServeMode" and"Standby Mode".When the productis at
consistency in "Serve Mode", the IntelliTec control uses a
timer instead of the sensor and will not start another
freezing cycle until a preset value (DftOffTme) is met.
The control will monitor product after it is at consistency,
activatingthe stir cycleand counting the numberof cycles.
When the cycle count is reached, the control will move to
"Standby Mode".
The "Standby Mode" is the same as in normal operation
with the exception of when the preset time (Stb Time) is
met, the control moves back into the "Serve Mode". Refer
to Figure 1-7 for details.
In the event a hopper temperature sensor fails, the control
will use the temperature of the other hopper to control the
refrigerationcycle.
If both temperature sensors fail, the refrigeration cycle is
managed by preset times (Hpr On and Hpr Off). This
refrigeration cycle is independent of the freezing cycle.
1.7 MOTOR PROFILE CUTOUT
COMPENSATION
The IntelliTec control is programmed to automatically
functionata rangeofsupply voltages.Thisfeature provides
the advantage of having product maintained at a specific
temperature and consistency irrespective of the supply
voltage. A motor profile curve is programmed on the
IntelliTec control and provides a relationship between the
supplyvoltage anddrive motorcutout amperage.Depend-
ing on the supply voltage, the control varies cutout amper-
ageaccordingto themotor profile.Thisfeature isautomatic
and does not need any configuring.
audible alarm is a reminder for the operator to end the
"Clean Mode" when cleaning is completed.
If the machine is kept in "Clean Mode" for more than 20
minutes,the augerdrive motorstops,the hopperrefrigera-
tion starts, and an error code (E4) is displayed on the
display panel. The error code prevents damage to the
machine that could occur during an extended clean mode
(Refer to Section 8 - Troubleshooting for details). To clear
this error, place the Freezing Cylinder Off-On switch in the
Off position and back in the On position. If the machine is
stillbeing cleaned,pushing theCLEAN buttonwill resetthe
timer and restart the "Clean Mode".
1.4 MIX LEVEL INDICATORS
The hoppers are equipped with a sensor that monitors mix
level.Whenthe mixlevel dropsbelowthesensorprobe, the
lower line of the display will read "Low Mix" and the display
will flash. To clear the "Low Mix" error, add mix to the
hopper.
1.5 HOPPER REFRIGERATION
TheIntelliTeccontrolisprogrammedtohandle refrigeration
ofthehopper independentlyfrom thefreezingcylinder.The
left control maintains hopper temperature between two
presetvalues (HprCutInand HprCtOut).
NOTE
The Refriger setting should be 2 Hopper for the Left
control and None for the right control.
Thehopperrefrigeration cyclestarts whenthe temperature
ofeitherhopperreachestheHprCutIn valueandstopswhen
both hoppers reach the HprCutOut value.
In addition to this refrigeration cycle, hopper refrigeration
may start when the freezing cycle starts. This reduces
compressorcycles whichpreserves compressor life.Hop-
perrefrigerationwill startifthe hoppertemperatureis above
a preset value (HprOffst + HprCtOut). This value is always
betweenHprCutIn andHprCtOut. Refrigerationof thehop-
per will continue until the HprCtOut is reached or until the
freezing cycle is completed in the freezing cylinder.
Therefrigeration cyclewill runfora maximumof 4minutes.
After 4 minutes, the refrigeration cycle will stop for a
minimum of 3 minutes. At the expiration of 3 minutes, the
controlwill checkproduct temperature.If producttempera-
tureis ator aboveHprCutIn, another refrigerationcycle will
start.
NOTE
If the temperature in the cabinet stays above 50°F
for more than two hours, the machine will go into
Sleep Mode and a clean message will be shown on
the display.
1.6 OPERATION DURING SENSOR FAILURE
The IntelliTec control is designed to allow the machine to
continueto function ifa temperature sensorfailure occurs.
If a sensor fails, the display will show the error and the
Figure 1-7 Serve Mode (Sensor Failure)
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Table 1-1 IntelliTec Control Setting Specifications
Basic Menu DISPLAY MODE DEFINITION
CutOut Serve Amp draw setting for cut out
Cut In T Serve Temperature setting for cut in
Cycles Serve Freezing cycles before going into Standby Mode
Stir On Serve Stir-only on time
Stir Off Serve Stir-only off time
Advanced Menu DISPLAY E131 F131 MODE DEFINITION
On Time 25 sec 15 sec Standby Freezing cycle "on” time (runs on timers only)
Off Time 450 sec 450 sec Standby Freezing cycle “off” time
Stb Time 120 min 120 min Standby Total time in mode
Sl1DrvOn 120 sec 120 sec Sleep 1 Drive motor “on” timer
Sl1DrOff 180 sec 180 sec Sleep 1 Drive motor “off” timer
Sl2CutIn 35°F 33°F Sleep 2 Cut in temperature
Sl2CtOut 30°F 30.5°F Sleep 2 Cut out temperature
DftOffTm 600 sec 600 sec No Sensor Default “off” time. Used in case of sensor failure
Storage Menu DISPLAY MODE DEFINITION
Refriger All Set to None, 1 Hopper, 2 Hopper, or Cabinet
HprCutIn All Refrigerated cab cut in temperature
HprCtOut All Refrigerated cab cut out temperature
Hpr Off No Sensor Default “off” time. Used in case of sensor failure
Hpr On No Sensor Default “on” time. Used in case of sensor failure
** The Refriger setting on the right control board must be set to None.
20
15 sec
300 sec
E131 & F131
130 sec
* The CutOut value needs to be adjusted to product requirements. Refer to the 2202077 - Specification Sheet for E131/F131
OT2 Intellitec Control located in the plastic pouch behind the left side panel.
** 2 Hopper
37.5°F
32°F
13 sec
IntellITec Control Setting Specifications
E131 & F131
*
22°F
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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.
Takenoticeof allwarning labelsonthe machine.Thelabels
have been put there to help maintain a safe working
environment.The labels have been designedto withstand
washing and cleaning. All labels must remain legible for
the life of the machine. Labels should be checked periodi-
cally to be sure they can be recognized as warning labels.
If danger, warning or caution labels are needed, indicate
the part number, type of label, location of label, and
quantity required along with your address and 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
may have occurred during transit.
With the method of packaging used, the machine should
arrive in excellent condition. THE CARRIER IS RESPON-
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
concealed damage and/or shortage is found later, advise
the carrier within 10 days and request inspection. The
customer must place claim for damages and/or shortages
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, 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.
A. Uncrate the machine.
B. Accuratelevelingisnecessaryforcorrectdrainage
of machine barrel and to insure correct overrun.
Placea bubble levelon top ofthe machine ateach
corner to check for level condition. If adjustment
is necessary, level the machine by turning the
bottom part of each leg in or out.
C. The machine has a base gasket that must be
installed. Separate the gasket and install it with
the seam to the back. Make sure the angled side
of the gasket is facing up.
C. Correctventilationisrequired. Theright sideof the
machine is the air intake and left side is the
discharge. Both sides must have 3" clearance.
CAUTION
Failure to provide adequate ventilation will void war-
ranty.
D. Place the Main Freezer Power Off/On switch in
the OFF position.
E. Connect the power cord to the proper power
supply. The plug connected to the machine is a
NEMA 6-20P. Check the nameplate on your
machine for proper supply. The unit must be
connected to a properly grounded receptacle.
Theelectricalcordfurnished aspartof themachine
has a three prong grounding type plug. The use of
an extension cord is not recommended, if
necessaryuse onewith asize 12gauge orheavier
with ground wire. Do not use an adapter to
circumvent the grounding requirement.
WARNING
Do not alter or deform electrical plug in any way.
Altering the plug to fit into an outlet of different con-
figuration may cause fire, risk of electrical shock,
product damage and will void warranty.
Figure 2-1 Space and Ventilation Requirements
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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
Operating Instructions.
B. Notice all warning labels on the machine.
C. Wearproperclothing. Avoidloosefitting garments,
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. Disconnectpower formaintenance.Neverattempt
to repair or perform maintenance on the machine
until the main electrical power has been
disconnected.
G. Donot operateunderunsafeoperatingconditions.
Neveroperatethe machineifunusual orexcessive
noise or vibration occurs.
3.2 OPERATING CONTROLS AND
INDICATORS
Before operating the machine, it is required that the
operatorknow thefunctionofeachoperatingcontrol.Refer
toFigure3-1forthe locationof theoperating controlsonthe
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-ON switch must be placed in the OFF position
prior to disassembling for cleaning or servicing. Do
not operate machine with panels removed.
Figure 3-1 Machine Controls
IntelliTec Control
(See Figure 3-2)
Main Freezer
Power Off/On
Dispense Rate
Adjustor
Freezing Cylinder
Off/On Switch
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A. MAIN FREEZER POWER SWITCH
The Main Freezer Power switch is a two position rocker
switch that supplies power to the IntelliTec control, freez-
ingcylindercircuitsandhopper refrigerationsystem. When
the switch is placed in the ON position, the hopper refrig-
eration system will run until the preset temperature is
reached; then it will cycle ON and OFF to maintain that
temperature.
B. FREEZING CYLINDER OFF/ON SWITCH
The Freezing Cylinder OFF/ON switch is a two position
toggleswitch used to supplypower to the freezingcylinder
control circuit. When the switch is in the OFF position, the
freezing cylinder’s refrigeration system and auger will not
operate. When the switch is in the ON position, the
machine will be operational.
C. SPIGOT SWITCH
The spigot switch is mounted to the spigot cam assembly
behind the header panel. When the spigot is opened to
dispense product, the spigot switch opens and the "Serve
Mode" begins.
D. DISPENSE RATE ADJUSTOR
The dispense rate adjustor is located under the header
panel, to the immediate right of the spigot handles. Turn-
ing the knob counterclockwise will decrease the dispense
rate.
E. PUSH TO FREEZE BUTTON
The PUSH TO FREEZE button is a membrane or snap
switch used to initiate "Serve Mode".
NOTE
After the PUSH TO FREEZE button is pressed, the
drive motor starts. After a 3-second delay, the com-
pressor will start.
F. LEDS
The membrane switch (touchpad) features two lights: a
green LED and an amber LED. The green LED is lit during
"Serve Mode". During freeze down, it is not lit. When
product consistency approaches 75% in the freezing
cylinder, the green LED flashes. The amber LED is on
during all other modes. Both LEDs alternatively flash if an
error occurs or if the freezing cylinder is off.
G. CLEAN BUTTON
The CLEAN button is a membrane, or snap switch. When
the button is pressed, the freezing cycle stops and the
drivemotor willstart. ACLEANmessage willdisplay onthe
LCD screen along with a 5-minute countdown timer. To
exitthe CLEAN mode,turn the FreezingCylinder OFF/ON
switch to the OFF position or press the CLEAN button
again. If the machine is left in CLEAN for more than 20
minutes,an errorcode (E4)willbe displayedon thedisplay
panel. Place the Freezing Cylinder OFF/ON switch in the
OFF position and back in the ON position to clear this
error.
H. DRIVE MOTOR OVERLOAD
Theinternaldrive motoroverloadwill tripif thedrivemotor is
overloaded.It willreset afterapproximately 10-12minutes.
Ifthe drivemotor continues totrip, referto Troubleshooting
in Section 7.
I. MIX LOW LIGHT INDICATOR
A MIX LOW message will appear on the LCD display to
alert the operator of a low mix condition. The message will
display when there is approximately one gallon of mix left
in the hopper. When the MIX LOW message is displayed,
refill the hopper immediately.
L. MENU NAVIGATION BUTTONS
The Menu Navigation Buttons allow the user to display
informationregarding themachine’s status ofoperation as
well as adjust product consistency (Fig. 3-2).
Selection Button (SEL) The SEL button is used
in combination with the up arrow button to enter
into the settings of the IntelliTec control. This
buttonis also usedto navigate throughthe control
settings menu.
Set Button (SET) The SET button is used to save
achange madetothe productconsistency setting.
It is also used to save changes when modifying
control settings.
Left Arrow Button (⇐) If the left arrow button is
pressed for 5 seconds, the display will remain lit.
To turn the light off, press the left arrow button for
5 seconds. The left arrow button is used primarily
to navigate through the control settings.
Up Arrow Button (⇑) After pressing the SET
button, the up arrow button will change the value
of the product consistency setting. This button is
alsoused tonavigatethrough thecontrol settings.
Figure 3-2 IntelliTec Control
Push to Freeze
Green LED
Amber LED
SEL Button
SET Button
Clean Button
Up Arrow Button
Left Arrow Button
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3.3IMPORTANTINFORMATIONREGARDING CLEANING
AND SANITIZING
Soft serve machines require special consideration when it
comes to food safety and proper cleaning and sanitizing.
The following information specifically covers issues for
cleaning and sanitizing frozen dessert machines. This
informationis meanttosupplement acomprehensive food
safety program.
SOIL MATERIALS ASSOCIATED WITH FROZEN
DESSERT MACHINES
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
difficult to remove and help attribute to milkstone buildup.
MILKSTONE – Is a white/gray film that forms on equip-
ment and utensils that are exposed to dairy products.
Thesefilms will accumulateslowly onsurfaces because of
ineffective cleaning, use of hard water, or both. Milkstone
is usually a porous deposit, which will harbor microbial
contaminants and eventually defy sanitizing efforts.
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.
In addition to food safety, milkstone can cause premature
wear to machine parts, which can add to costs for replace-
ment parts or possibly more expensive repairs if worn
machine parts are not replaced once they have become
excessively worn.
IMPORTANT DIFFERENCES BETWEEN CLEANING
AND SANITIZING
CLEANING vs. SANITIZING
It is important to distinguish between cleaning and sanitiz-
ing. Although these terms may sound synonymous, they
are not. BOTH are required for adequate food safety and
proper machine maintenance.
CLEANING
· Is the removal of soil materials from a surface.
· Is a prerequisite for effective sanitizing.
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
operators of frozen dessert machines.
SANITIZING
· Kills bacteria.
· Can be effective on clean surfaces only.
NOTE
Using a SANITIZER on an unclean surface will not
guarantee a clean and safe frozen dessert machine.
PROPER DAILY MAINTENANCE:
The Only Way to Assure Food Safety and Product Quality
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
purposes only.)
1. CLEANING – This involves draining mix from the
freezing cylinder and rinsing the machine with
water.Next, a cleaneris run throughthe machine.
Then,themachineisdisassembledandremovable
parts are taken to the sink for cleaning.
2. MILKSTONE REMOVAL – Since most cleaners
do not have the ability to remove milkstone, the
use of a delimer becomes necessary. Although
this procedure may not be needed on a daily
basis,it will usuallyfollow the cleaningprocedure.
It requires letting a delimer solution soak in the
machine for an extended period. Individual parts
are also soaked in a deliming solution for an
extended period of time (more about delimers in
Additional Information).
3. SANITIZING–Afterthemachinehasbeencleaned
and contains no milkstone, the machine is
reassembled. Then a FDA-approved sanitizing
solutionis runthrough the machineto killbacteria.
The machine is then ready for food preparation.
As a recommended cleaner and sanitizer for your frozen
dessertmachine, STERA-SHEENhasproven tobe one of
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
for food contact surfaces.
ADDITIONAL INFORMATION
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
providedwith delimerproducts.
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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.
With proper daily use of STERA-SHEEN or its equivalent,
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
wear and metal corrosion.
GENERAL PURPOSE CLEANERS
General purpose cleaners do not have the ability to re-
move milkstone. Milkstone will become a problem if not
remedied with additional products and procedures.
THE USE OF CHLORINE TEST STRIPS
“Test strips” are used to determine concentrations of
active chlorine in sanitizing solutions. To use the strips,
tear off a small portion and submerge it into the sanitizing
solution. Then, compare the color change to the color key
on the side of the test strip dispenser to determine the
approximate chlorine concentration.
The ideal concentration of chlorine needs to be 100 ppm
(as stated by the FDA).
NOTE
Follow the directions on the container for proper con-
centration.
Two main factors contribute to falling chlorine concentra-
tions in a sanitizing solution.
1. PRODUCT USE – As the chlorine in the solution
is being used, chlorine concentrations fall.
2. TIME– As timepasses, smallamounts of chlorine
“evaporate” from the solution. (That is why you
can smell it.)
Sanitizingsolutions shouldnot be allowedto fallbelow 100
ppm chlorine. New solutions should be mixed once old
solutions become ineffective.
3.4 DISASSEMBLY OF MACHINE PARTS
Before using the machine for the first time, complete
machinedisassembly, cleaningand sanitizingprocedures
needto be followed.Routine cleaning intervalsand proce-
dures must comply with the local and state health codes.
Inspectionforwornorbrokenpartsshould bemadeatevery
disassembly of the machine. All worn or broken parts
shouldbereplacedtoensuresafetytoboththe operatorand
the customer and to maintain 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. Turnthe Main Freezer Power Off/On switchto the
OFF position.
2. Remove the knobs on the front door.
3. Remove the front door by pulling it off the studs.
4. Removethe spigot through the bottomof the front
door.
5. Remove all o-rings from parts by first wiping off
the lubrication using a clean towel. Then squeeze
theo-ring upward toform aloop(Fig. 3-4).Roll the
o-ring out of the groove.
Wear Line
Figure 3-3 Auger Flight Wear
Figure 3-4 Removing O-Ring
CAUTION
Do not use any type of sharp object to remove the
o-rings.
WARNING
High voltage will shock, burn or cause death. The
OFF-ON switch must be placed in the OFF position
prior to disassembling for cleaning or servicing. Do
not operate machine with panels removed.
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