Polar Ware STOELTING U431 User manual

Model U431 (Serial #0 thru 17977)
OWNER'S MANUAL
Manual No. 513568 Dec. 2002, Rev. 5

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STOELTING, LLC Tele: 920-894-2293
502 Hwy 67
Kiel, WI 53042-1600 Fax: [phone]
STOELTING®OWNER'S MANUAL
FOR
MODEL U431
CAB MODEL SOFT-SERVE PRESSURIZED FREEZER
This manual provides basic information about the freezer. Instructions and suggestions are given
covering its basic operation and care.
Theillustrationsandspecificationsarenotbindingindetail. Wereservetherighttomakechanges
atanytimewithoutnotice,tothefreezeranditscomponents,withoutincurringanyobligationtomodify
orprovide newparts forfreezers builtprior todate ofchange.
DONOTATTEMPTtooperatethefreezeruntilinstructionsandsafetyprecautionsinthismanualare
readcompletelyandarethoroughlyunderstood. Ifproblemsdeveloporquestionsariseinconnection
withinstallation,operationorservicingofthefreezer,contactthecompanyatthelocationlistedbelow.

TABLE OF CONTENTS
Section 1 .............................................................................................................. 1
1.1 Description.............................................................................................. 1
1.2 Specifications.......................................................................................... 2
Section 2 .............................................................................................................. 3
2.1 SafetyPrecautions .................................................................................. 3
2.2 Shipment &Transit .................................................................................. 4
2.3 FreezerInstallation................................................................................... 4
2.4 Installing PermanentWiring...................................................................... 4
2.5 Mix Pump ................................................................................................ 5
Section 3 .............................................................................................................. 9
3.1 SafetyPrecautions .................................................................................. 9
3.2 OperatingControls andIndicators............................................................ 9
3.3 Sanitizing ................................................................................................ 10
3.4 InitialFreeze DownandOperation ........................................................... 11
3.5 MixInformation ........................................................................................ 11
3.6 OperationofMix Pump ............................................................................ 11
3.7 RemovingMix fromthe Freezer ............................................................... 12
3.8 Cleaningthe Freezer ............................................................................... 12
3.9 Disassemblyof Freezer Parts.................................................................. 12
3.10 RoutineCleaning ..................................................................................... 13
3.11 MixPump Cleaning ................................................................................. 14
3.12 SanitizeFreezerParts ............................................................................. 14
3.13 AssemblyofFreezer................................................................................ 14
Section 4 .............................................................................................................. 17
4.1 Freezer Adjustment ................................................................................. 17
4.2 ProductTemperatureAdjustment ............................................................. 17
4.3 OverrunAdjustment ................................................................................. 17
4.4 Mix PumpHoseReposition ..................................................................... 18
4.5 MixPump HoseReplacement.................................................................. 18
4.6 CabTemp.Adjustment............................................................................. 18
4.7 DriveBeltTensionAdjustment.................................................................. 18
4.8 Condenser Cleaning(Air Cooled Freezers) ............................................. 19
4.9 PreventativeMaintenance........................................................................ 19
4.10 ExtendedStorage ................................................................................... 19
4.11 Troubleshooting ....................................................................................... 20
Section 5 .............................................................................................................. 25
5.1 How toOrderReplacement Parts ............................................................ 25
5.2 PartsLists and ReferenceDrawings........................................................ 25

ILLUSTRATIONS
Figure 1 ModelU431 Freezer ..............................................................1
Figure 2 Specifications........................................................................1
Figure 3 Decal Locations.....................................................................3
Figure 4 Water/ElectricalConnections .................................................4
Figure 5 AugerRotation.......................................................................4
Figure 6 MixHoseInstallation...............................................................5
Figure 7 MixPump...............................................................................6
Figure 8 4WayTee .............................................................................7
Figure 9 MixInletTube &ProbeAssy.Clip...........................................7
Figure 10 HoseHolder...........................................................................7
Figure 11 OperatingControls.................................................................9
Figure 12 Air Bleed Valves ....................................................................10
Figure 13 DrainingSanitizer ..................................................................10
Figure 14 MixContainer.........................................................................11
Figure 15 MixPumps.............................................................................12
Figure 16 AugerFlight Wear& FrontAuger SupportBushingWear .......13
Figure 17 FrontDoor Disassembly ........................................................13
Figure 18 AugerFlightRemoval.............................................................13
Figure 19 RearSealRemoval................................................................13
Figure 20 CleaningFeedTube ..............................................................14
Figure 21 CleaningAirTube ..................................................................14
Figure 22 RemovableParts ...................................................................14
Figure 23 RearSeal Lubrication ............................................................14
Figure 24 SpringInstallation...................................................................15
Figure 25 FrontDoorAssembly .............................................................15
Figure 26 Potentiometer ........................................................................17
Figure 27 OverrunAdjustment................................................................17
Figure 28 TemperatureControlCab ......................................................18
Figure 29 BeltAdjustment ......................................................................19

1
SECTION 1
INTRODUCTION
1.1 DESCRIPTION
The Stoelting U431 floor model freezer is pressure fed.
The freezer is equipped with fully automatic controls to
provide a uniform product. The freezer is designed to
operate with almost any type of commercial soft-serve
ornon-dairy mixesavailable,including icemilk, icecream,
yogurt, and frozen dietary desserts.
Thismanual isdesignedto assistqualified personneland
operators in the installation, operation and maintenance
of the Stoelting Model U431 pressure freezer.
Figure 1. Model U431 Freezer
Figure 2. Specification

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1.2 SPECIFICATIONS