Vollrath STOELTING SF144 User manual

Model SF144
SERVICE MANUAL
Manual No. 513657 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.

Section Description Page
1 Description and Specifications
1.1 Description .................................................................................................1
1.2 Specifications.............................................................................................1
1.3 ModesofNormalOperation ........................................................................4
1.4 MixLevelIndicators ....................................................................................6
1.5 HopperRefrigeration ...................................................................................6
1.7 MotorProfileCutoutCompensation ............................................................6
2 InstallationInstructions
2.1 SafetyPrecautions .....................................................................................9
2.2 ShipmentandTransit .................................................................................9
2.3 MachineInstallation....................................................................................9
3 Initial Set-Up and Operation
3.1 Operator’sSafetyPrecautions ....................................................................11
3.2 OperatingControlsandIndicators...............................................................11
3.3 ImportantInformationRegardingCleaningandSanitizing ............................13
3.4 Disassembly of Machine Parts ...................................................................14
3.5 CleaningDisassembledParts.....................................................................15
3.6 Sanitizing Machine Parts............................................................................15
3.7 CleaningtheMachine .................................................................................15
3.8 AssemblingtheMachine ............................................................................16
3.9 Sanitizing ...................................................................................................16
3.10 InitialFreezeDownandOperation ..............................................................17
3.11 NormalFreezeDownandOperation ...........................................................18
3.12 MixInformation ...........................................................................................18
4 Maintenance and Adjustments
4.1 MachineAdjustment...................................................................................19
4.2 Product Consistency Adjustment ...............................................................19
4.3 LockingtheControlPanel...........................................................................19
4.4 ObtainingReadingsandModifyingSettings................................................19
4.5 Readings ....................................................................................................21
4.6 Adjustments ...............................................................................................22
4.7 OtherSettings ............................................................................................22
4.8 DriveBeltTensionAdjustment....................................................................23
4.9 CondenserCleaning ...................................................................................23
4.10 PreventativeMaintenance ...........................................................................24
4.11 ExtendedStorage.......................................................................................24
TABLE OF
CONTENTS

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 FilterDrier ..................................................................................................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 CondenserFanMotor(AirCooledModelsOnly) .........................................38
6.7 Spigot Switch .............................................................................................39
6.8 TemperatureControlSensor .......................................................................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 AugerShaftandFaceplate Parts................................................................46
8.3 MachineFront ............................................................................................48
8.4 Panels........................................................................................................48
8.5 Blender.......................................................................................................49
8.5 LeftSide.....................................................................................................50
8.6 RightSide ..................................................................................................52
8.7 Front ..........................................................................................................52
8.8 Rear ...........................................................................................................53
8.10 Spigot.........................................................................................................54
8.11 RefrigerationDiagram&WiringDiagram .....................................................55

1
SECTION 1
INTRODUCTION
1.1 DESCRIPTION
The Stoelting SF144 countertop combination shake/soft
servemachineisgravityfed.Themachineisequippedwith
fully automatic controls to provide uniform product. The
SF144 is designed to operate with almost any type of
commercialsoftserveandshakemixesavailable,including
ice milk, ice cream, yogurt, and frozen dietary desserts.
TheSF144allowstheoperatortodispenseoutstandingsoft
serve from the left spigot, and thick creamy shakes or
smoothiesfromtherightspigot,withtheconvenienceand
costof one unit.The SF144includes ablender formixing
fruitandberriesintothedairyproductformakingsmoothies.
Thismanualisdesignedtoassistqualifiedserviceperson-
nelandoperatorsintheinstallation,operationandmainte-
nanceof the StoeltingSF144gravitymachine.
Figure 1-2 Specification
Figure 1-1 SF144 Machine
1.2 SPECIFICATIONS

2
1.2 SPECIFICATIONS
* CutOut amps must be set on site.
**TheRefrigersettingontherightcontrolboard
must be set to None.
Dimensions
width
height
depth
Weight
Electrical
running amps
connectiontype
International Option
Compressor
Drive Motor
Air Flow
Plumbing Fittings
Hopper Volume
Freezing Cylinder
Volume
Individually
BothSides Running
Production
Capacity
Soft Serve - 8 GPH (30,29 liters) Left Side
Shake/Smoothie - 11 GPH (41,64 liters) RightSide
Soft Serve - 5.6 GPH (21,20 liters) Left Side
Shake/Smoothie - 8 GPH (30,29 liters) Right Side
NEMA6-20P power cord provided
Two - 0.85 gallon (3.4 quart), 3,22 liters
12,000 Btu/hr
Two - 3/4 hp
Air cooled units require 3" (7,6 cm)air space onbothsides
Two - 3 gallon (11,35 liters)
Water cooled units require 3/8" N.P.T. water and drainfittings.
Model F144 / SF144
28-1/2'' (72,4 cm)
34-3/4'' (88,3 cm)
22'' (55,9 cm)
Machine with crate
28'' (71,1 cm)
40-1/4'' (102,2 cm)
35-1/4'' (89,5 cm)
1 Phase, 220-240 VAC, 50Hz
470 lbs (213,1 kg)385 lbs (174,6 kg)
1 Phase, 208-230 VAC, 60Hz
approximately11A
Menu Display Value
Basic CutOut * amps
Cut In T 19 °F
Cycles 20 count
Stir On 15 seconds
Stir Off 300 seconds
Advanced OnTime 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 31.5 °F
control HprCtOut 27 °F
only) HprOffst 8 °F
Hpr Off 13 minutes
Hpr On 130 seconds
F144 / SF144
Refrigerant R-404A
Charge (W/C) 32 oz
(A/C) 42 oz
Suction Pressure
(at 72°F)
One Cylinder 18-22 psig
BothCylinders 22-26 psig
Hopper Only14 psig
Discharge Pressure 225-235 psig
Hot Gas Bypass
Pressure 14 psig (only hopper running)
EPR Valve 59-61 psig

3
1.3 MODES OF NORMAL OPERATION
Following are details of the operational modes of the
IntelliTeccontrol. NOTE:
Thepresetamounts,times,andtemperatureslisted
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
startinthe“Sleep1 Mode". The display will read"Sleep1
Mode".Thecontrolwilleventuallymoveintothe“Sleep2”
mode if the PUSH TO FREEZE button is not pressed.
WhenthePUSHTOFREEZEbuttonispressedthecontrol
willmovetothe“ServeMode”.
B.SERVEMODE
WhenthePUSHTOFREEZEbuttonispressedoraspigot
handleispulled,the“ServeMode”begins.Thedrivemotor
starts,andafter a 3 seconddelay, the compressorstarts.
Thedisplayreads“FREEZING”onthetoplineandabaron
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
thefreezingcylinder.Whenthecontrolsensestheproduct
is at 75% of consistency, the display will read "SERVE",
theamberLEDwillgoout,andthegreenLEDwillflash.At
this time, product can be served from the machine. The
drive motor and compressor will continue to run until the
toroidreadsapresetvalue(CutOutamps).Whenthetoroid
readstheCutOutampsonthedrivemotor,thecompressor
turnsoffandthegreenLEDwillremainlit.Aftera3second
delay,thedrivemotorturnsoff.Theproductinthefreezing
cylinderis now atserving temperatureand consistency.
After product is at consistency, the IntelliTec control
continuously monitors refrigerant temperature through a
thermistor mounted on the side of the freezing cylinder.
Whenthetemperatureincreasestoapreset amount(Cut
In T), a 3-second drive motor pre-stir analyzes product
consistency. The pre-stir check is also performed each
timethespigothandleisopened.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(StirOnandStirOff).Thestircyclepreventsproduct
separation.Ifafreezingcycleisinitiated,thetimerisreset.
In addition to the "Serve Mode" freezing cycle, there is a
freezingcyclebasedonapresettime(DftOffTime).Ifthis
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
countsettingisattained.Thecyclecountisthenumberof
activefreezing cyclesand isbased ona preset value
(Cycles).Oncethecyclecount hasbeenreachedwithout
user interruption, the control will move into the "Standby
Mode".
If the PUSH TO FREEZE button is pressed or a spigot
handleispulled,thecyclecountisresetandthecontrolwill
movetothebeginningofthe"ServeMode".RefertoFigure
1-3foragraphicalrepresentationofthe"ServeMode".
C.STANDBYMODE
Ifnoproducthasbeendrawnfromthespigotandthepreset
numberofactivefreezingcyclesismet,thecontrolmoves
intothe“StandbyMode”.In "StandbyMode",thefreezing
cycleisbasedonpresettimers(OnTimeandOffTime),and
prevents ice crystals from building up in the product.
Becausetheproductremainspartiallyfrozen,itcanquickly
returntoservableconsistencywhenthePUSHTOFREEZE
button is pressed.
During “Standby Mode”, the stir cycle runs. This cycle is
basedonpreset,timedintervals(StirOnandStirOff)and
preventsproductseparation.
The"StandbyMode"maintainsproductqualityduringslow
times,whileminimizingreactivationtime.Thismodelasts
for a preset time (Stb Time). Once this time has been
reachedwithoutuserinterruption,thecontrolmovesinto
Figure 1-3 Serve Mode
Figure 1-4 Standby Mode

4
the "Sleep 1 Mode". Refer to Figure 1-4 for a graphical
representationofthe"StandbyMode".
If a spigot is opened or the PUSH TO FREEZE button is
pressed,thecontrolwillmoveto“ServeMode”.Productin
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 1MODE
After the “Standby Mode” time has expired without user
interruption,thecontrolwillmoveintothe“Sleep1Mode”.
During the "Sleep 1 Mode", the stir cycle is handled by
presettimers(Sl1DrvOnandSl1DrOff),andallowsproduct
to melt to a liquid state by using agitation cycles without
anyflow of refrigerant.Although theproduct temperature
never increases above 40°F, the product thaws rapidly
whichminimizesproductbreakdown.Thecontrolwillstay
in the “Sleep 1 Mode” until sensing a preset temperature
(Sl2CutIn). When this temperature has been reached
withoutuserinterruption,thecontrolwillmovetothe"Sleep
2Mode".RefertoFigure1-5foragraphicalrepresentation
of the "Sleep 1 Mode".
If a spigot is opened or the PUSH TO FREEZE button is
pressed,thecontrolwillmoveto“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 completedto serve product.
E.SLEEP2 MODE
The “Sleep 2 Mode” maintains the freezing cylinder tem-
peraturebetweentwopresetvalues(Sl2CutInandSl2CtOut).
During the “Sleep 2 Mode”, the stir cycle runs. This cycle
isbasedonpreset,timedintervals(StirOnandStirOff)and
preventsproductseparation.The"Sleep2Mode"isoften
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,thecontrolwillmoveto“ServeMode”.Ifthespigot
is opened at this time, the product will be liquid. The
operator must wait until the first "Serve Mode" freezing
cyclehascompletedtoserveproduct.RefertoFigure1-6
fora graphical representation of the "Sleep 2Mode".
Figure 1-5 Sleep 1 Mode
F.INTELLITECRESTART(VERSION3.5ORHIGHER)
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
restartattempt.TherestartcountwillresetifthePUSHTO
FREEZE button is pressed, the spigot is pulled, or the
Freezing Cylinder OFF/ON switch is placed in the OFF
position.
Thefollowingareconsideredharderrors:
ERRORCODE MALFUNCTION
2 HighTorque
3 RunTime
4 Clean
7 DriveMotor
9 HighPressureCutout
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.SLEEP3MODE(VERSION3.5ORHIGHER)
If a high torque, run time, or drive motor error condition
occursonthethirdrestartattempt,thecontrolwillmoveto
the "Sleep 3 Mode".
In"Sleep3Mode"freezingcylinderrefrigerationwillrunfor
4 seconds every 10 minutes. This ensures the product
temperature never increases above 40°F. The stir cycle
andthe augerdo notrun 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.CLEANMODE
When the CLEAN button is pressed on the left side, all
hopper refrigeration stops. When the CLEAN button is
pressedontherightside,onlytherightbarrelfreezingcycle
stops.Ineithercase,thedrivemotorofthatbarrelstartsand
will run for 20 minutes and a 5 minute countdown timer is
displayed.Afterthetimehaselapsed,anoptionalaudible
alarm will sound if this accessory has been installed. The
Figure 1-6 Sleep 2 Mode