Vollrath STOELTING O431RC User manual

Model O431RC
OPERATORS MANUAL
Manual No. 513664 Rev.2

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.............................................................................................2
2 Installation Instructions
2.1 SafetyPrecautions.....................................................................................3
2.2 Shipment and Transit.................................................................................3
2.3 FreezerInstallation ....................................................................................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 Important Information Regarding Cleaning and Sanitizing .........................9
3.4 Disassembly of Freezer Parts....................................................................10
A. Disassembly of Front Door..................................................................................10
B. Disassembly of Auger .........................................................................................11
3.5 Cleaning Disassembled Parts....................................................................11
3.6 Sanitizing Freezer Parts.............................................................................11
3.7 Cleaning the Freezer .................................................................................11
3.8 Assembling Freezer ...................................................................................11
3.9 Sanitizing ...................................................................................................12
3.10 Initial Freeze Down and Operation.............................................................13
A. Adding Mix ...........................................................................................................13
B. Preparing the IntelliTec Control...........................................................................13
C. Initial Freeze Down..............................................................................................13
D. Adjusting the IntelliTec Control............................................................................14
E. Serving Product ...................................................................................................14
3.11 Normal Freeze Down and Operation..........................................................14
3.12 Mix Information ..........................................................................................15
3.13 Operation of Mix Pump ..............................................................................15
3.14 Mix Pump Cleaning....................................................................................16
3.15 Disassembly and Inspection of Removable Parts ......................................16
TABLE OF
CONTENTS

Section Description Page
4 Maintenance and Adjustments
4.1 Freezer Adjustment ...................................................................................17
4.2 Product Consistency Adjustment ...............................................................17
4.3 Locking the Control Panel..........................................................................17
4.4 Obtaining Readings and Modifying Settings (Service Personnel Only) ......17
4.5 Readings (Service Personnel Only) ...........................................................18
4.6 Adjustments (Service Personnel Only) ......................................................19
4.7 Other Settings (Service Personnel Only) ...................................................19
4.8 Overrun Adjustment...................................................................................19
4.9 Mix Pump Hose Reposition........................................................................20
4.10 Mix Pump Hose Replacement ...................................................................20
4.11 Cab Temperature Adjustment....................................................................21
4.12 Drive Belt Tension Adjustment...................................................................21
4.13 Condenser Cleaning (Air-Cooled Freezers) ...............................................22
4.14 PreventativeMaintenance..........................................................................22
4.15 Extended Storage ......................................................................................22
5 Troubleshooting
5.1 Error Codes ...............................................................................................23
5.2 Troubleshooting - Error Codes...................................................................23
5.3 Troubleshooting - Freezer..........................................................................25
5.4 Troubleshooting - Mix Pump ......................................................................26
6 Replacement Parts
6.1 Brushes, Decals and Lubrication ...............................................................29
6.2 Spigot Extension........................................................................................29
6.3 Auger Shaft and Faceplate Parts ...............................................................30
6.4 Cab Tubing Assembly................................................................................31

1
1.1 DESCRIPTION
TheStoeltingO431RCfloormodelmachineispressurefed.
The machine is equipped with fully automatic controls 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,andfrozendietarydesserts.TheO431RChasarear
openingrefrigeratedcabinetwithrearcontrols.
Thismanualisdesignedtoassistqualifiedserviceperson-
nel and operators in the installation, operation and main-
tenanceoftheStoeltingO431RCpressuremachine.
SECTION 1
DESCRIPTION AND SPECIFICATIONS
Figure 1-1 Model O431RC Freezer

2
1.2 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
Air cooled units require 3" (7,6 cm)air space onbothsides.
Air Cooled Water Cooled
approximately17A approximately15A
1 Phase, 220-240 VAC, 50Hzor 3 Phase, 380-415 VAC, 50Hz
Water cooled units require 1/2" N.P.T. water and drainfittings.
Model O431 RC
37-3/4'' (95,9 cm)
67-7/8'' (172,4 cm)
1 Phase, 208-240 VAC, 60Hz
19-1/8'' (48,6 cm)
Machine
NEMA L6-30P NEMA L6-30P
Two - 3/4 hp
with crate
27'' (68,6 cm)
78'' (198,1 cm)
48'' (121,9 cm)
650 lbs (294,8 kg)500 lbs (226,7 kg)
Two - 1 gallon(3,79 liters)
Two - 5.5 gallons (20,82 liters)
15,000 Btu/hr Scroll™ Compressor

3
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.
Take notice of all warning labels on the machine. The
labelshavebeenputtheretohelpmaintainasafeworking
environment.Thelabelshavebeendesignedtowithstand
washing and cleaning. All labels must remain legible for
thelifeofthemachine.Labelsshouldbecheckedperiodi-
callytobesuretheycanberecognizedaswarninglabels.
If danger, warning or caution labels are needed, indicate
the part number, type of label, location of label, and
quantity required along with your address and mail to:
STOELTING, INC.
ATTENTION: Customer Service
502 Hwy. 67
Kiel, Wisconsin 53042
2.2 SHIPMENT AND TRANSIT
The machine has been assembled, operated and in-
spectedatthefactory.Uponarrivalatthefinaldestination,
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
VISIBLEORCONCEALED.Donotpaythefreightbilluntil
the machine has been checked for damage. Have the
carrier note any visible damage on the freight bill. If
concealeddamageand/orshortage isfoundlater,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,
severedamage tothe machineand will voidfactory
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.
SECTION 2
INSTALLATION INSTRUCTIONS
B. Installthefourcasters.Turnthethreadedendinto
the machine until no threads are showing. 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. (Fig. 2-1)
E. Machines that have a water-cooled condenser
require 1/2" NPT supply and drain fittings.
F. Inair-cooledmachines,useavoltmetertomeasure
incoming voltage. If the supply voltage is 215 or
less, then the buck-boost transformer must be
connected to the fan motor. Refer to the wiring
diagram located behind the header panel to
connect. NOTE
Supply voltage must be checked to make sure the
fan motor operates properly.
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
surethepowersourceinthebuildingmatchesthe
nameplate requirements.
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.
Figure 2-1 Space and Ventilation Requirements

4
2.5 MIX PUMP
A. MIX PUMP HOSE INSTALLATION
Followthestepsbelow toinstallthemix pumphoseinthe
cabinet part of the machine.
1. Turnthemixpumpon.Theswitchislocatedatthe
top of the cabinet.
2. Feed one end of the mix pump hose into the
entering or pickup hose side (left) of black cover
(Fig 2-2). NOTE
Feedthe tubeinto the clampso thenatural curve 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. Allowthehosetofeeditselfthroughthepumpuntil
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. Connectthefreeendofthemixpumphosetothe
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. Connect a 2" (5cm) length of 3/8" (9,5mm) ID
plastic food grade tubing to the mix pickup
assembly. Secure with hose clamps. Place the
assemblythroughtheholeinthecoverandinstall
the retaining clip.
Figure 2-2 Mix Hose Installation
6" (15cm)