Vollrath O431RC User Manual
Model O431RC
OWNER’S MANUAL
Manual No. 513664 Jan, 2011
Owner's Manual
For O431-RC
High Capacity Floor Model
Rear Opening Cabinet - Pressure Soft Serve Machine
This manual provides basic information about the freezer. 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 provide new parts for freezers 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 the company at the following location:
STOELTING Ph: 800-558-5807
502 Hwy. 67
Kiel, WI 53042 Fax: 920-894-7029
© 201 1 Stoelting, LLC, All Rights Reserved
A Few Words About Safety
Safety Information
Read and understand the entire manual before
operating or maintaining Stoelting equipment.
This Owner's Manual provides the operator with
information for the safe operation and maintenance of
Stoelting equipment. There are hazards associated
with the operation of this machine. For this reason
safety is emphasized throughout the manual. To
highlight specific safety information, the following
safety definitions are provided to assist the reader.
The purpose of safety symbols is to attract your
attention 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 S toelting
parts with the correct part number or an equivalent
part. We strongly recommend that you do not use
replacement parts of inferior quality .
Safety Alert Symbol:
This symbol Indicates danger, warning or caution.
Attention is required in order to avoid serious personal 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.
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” indicates a potentially
hazardous situation, which, if not avoided, may result
in minor or moderate 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 equipment/property damage.
NOTICE
The signal word “NOTICE” indicates information or
procedures that relate directly or indirectly to the
safety or 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 Freezer 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 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
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 Preventative Maintenance..........................................................................22
4.15 Extended Storage ......................................................................................22
5 Troubleshooting
5.1 Error Codes ...............................................................................................2 3
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
SECTION 1
DESCRIPTION AND SPECIFICATIONS
1.1 DESCRIPTION
The Stoelting O431RC floor model machine is pressure fed.
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, and frozen dietary desserts. The O431RC has a rear
opening refrigerated cabinet with rear controls.
This manual is designed to assist qualified service personnel and operators in the installation, operation and maintenance of the Stoelting O431RC pressure machine.
Figure 1-1 Model O431RC Freezer
1
1.2 SPECIFICATIONS
Dimensions
width
height
depth
Weight
Electrical
running amps
connection type
International Option
Compressor
Drive Motor
Air Flow
Plumbi ng Fi t t i ngs
Hopper Volume
Freezing Cylinder
Volume
Model O431 RC
Machine
19-1/ 8 '' (48,6 c m )
67-7/ 8' ' ( 172 , 4 cm )
37-3/ 4 '' (95,9 c m )
1 Phase, 208- 240 VAC, 60Hz
Air Cooled Water Cooled
approximat e l y 17A approximately 15A
NEMA L6-30P NEMA L6-30P
1 Phase, 220-240 VAC, 50Hz or 3 Ph ase, 380-415 VAC, 50Hz
15,000 Btu / h r Scrol l ™ Compressor
Two - 3/ 4 hp
Air cool ed un it s r equire 3" ( 7, 6 cm ) air spac e on both sides.
Water cool ed un its r equire 1/2" N. P.T. water an d dr ain fittings.
Two - 5. 5 ga l l o ns (20, 8 2 l it er s)
T w o - 1 gallon (3,79 lit er s )
with cra te
27'' ( 68, 6 c m )
78'' ( 198, 1 c m )
48'' ( 121, 9 c m )
650 lbs ( 294, 8 kg )500 lbs (226,7 kg)
2
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.
Take notice of all warning labels on the machine. The
labels have been put there to help maintain a safe working
environment. The labels have been designed to withstand
washing and cleaning. All labels must remain legible for
the life of the machine. Labels should be checked periodically 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, INC.
A TTENTION: Customer Service
502 Hwy . 67
Kiel, Wisconsin 53042
2.2 SHIPMENT AND TRANSIT
The machine has been assembled, operated and inspected 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 RESPONSIBLE 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 a claim for damages and/or shortages in shipment with the carrier. Stoelting, Inc. cannot
make any claims against the carrier.
B. Install the four casters. Turn the threaded end into
the machine until no threads are showing. To
level, turn out casters no more than 1/4" 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. In air-cooled machines, use a voltmeter to measure
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 .
2.3 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 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.
Figure 2-1 Space and Ventilation Requirements
2.4 INSTALLING PERMANENT WIRING
If permanent wiring is required by local codes, the following procedure must be performed:
A. Refer to the nameplate on the side panel of the
machine for specific electrical requirements. Make
sure the power source in the building matches the
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.
3
6" (15cm)
Figure 2-2 Mix Hose Installation
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. The switch is located at the
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
Feed the tube into the clamp so the natural 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. 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
The O431 machine may be connected to the standard mix
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
assembly through the hole in the cover and install
the retaining clip.
4
Figure 2-3 Mix Pump Connections for Standard Mix Container
2. Connect the free end of the tubing to the mix
check valve. Observe the direction of the check
valve flow arrow. Secure with a hose clamp.
Connect a 24" (61cm) length of 3/8" (9,5mm) ID
plastic food grade tubing to the free end of the
check valve and secure with a hose clamp.
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).
When Using Bag Connection System (BCS) with Three
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. Connect 3/8" (9,5mm) ID plastic food grade tubing
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 the
mix inlet manifold and secure with a retaining clip.
(Fig. 2-5).
Mix Outlet
Drains
Last
Figure 2-4 BCS Mix Inlet Manifold
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.
6. Connect the bag adapter attached to the 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 adapters
must be installed closest to the manifold outlet and the
manifold plug(s) must be placed farthest from the manifold
outlet.
1. Connect 3/8" (9,5mm) ID
plastic food grade tubing
to a bag adapter. Secure
with hose clamps.
2. Slide the hose clip over
the free end of the tubing.
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
into each empty inlet and
secure with a retaining
clip.
6. Place the mix bag(s) into
the mix container.
7. Connect the bag adapter
attached to the left side
of the manifold (closest
to the mix outlet) to the
mix bag in the back of
the mix container.
Manifold
Adapter
C. MIX LOW LEVEL INDICATOR ADJUSTMENT
The sensitivity of the “Mix Low” indication that displays on
the control panel can be adjusted to operator preference.
If more advanced notice of low mix is required, loosen the
black adjustment knobs located on 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, slide the bracket downward. Be sure to tighten the adjustment knobs after
properly positioning the sensor.
Mix Inlet
Retaining
Clip
Manifold
Plug
Bag Adapter
Manifold
Figure 2-5 Bag Connection System (Optional)
6
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