Stoelting SU412 Service Manual
Model SU412
OPERATORS MANUAL
Manual No. 513625 Rev.3
This manual provides basic information about the machine. Instructions and suggestions are
given covering its operation and care.
The illustrations and specifi cations 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 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.
stoeltingfoodservice.com
Stoelting Foodservice Equipment
502 Highway 67
Kiel, WI 53042-1600
U.S.A.
Main Tel: 800.558.5807
Fax: 920.894.7029
Customer Service: 888.429.5920
Fax: 800.545.0662
Email: foodservice@stoelting.com
© 2014 PW Stoelting, LLC
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
specifi c safety information, the following safety defi ni-
tions 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 Stoelting
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.
NOTE (or NOTICE)
The signal word “NOTICE” indicates information or
procedures that relate directly or indirectly to the
safety of personnel or equipment/property.
TABLE OF
CONTENTS
Section Description Page
1 Description and Specifi cations
1.1 Description ..................................................................................................1
1.2 Specifi cations .............................................................................................2
2 Installation Instructions
2.1 Safety Precautions .....................................................................................3
2.2 Shipment and Transit ..................................................................................3
2.3 Machine 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 Emptying the Freezing Cylinder .................................................................9
3.4 Disassembly of Machine Parts ...................................................................9
A. Remove Blender ..................................................................................................9
B. Remove Front Door ..............................................................................................10
C. Remove Auger .....................................................................................................10
D. Pump Hose Disassembly .....................................................................................10
3.5 Cleaning Disassembled Parts ....................................................................10
3.6 Cleaning the Machine .................................................................................11
3.7 Assembling Machine ..................................................................................11
3.8 Sanitizing ....................................................................................................12
3.9 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 .............................................................................13
E. Serving Product....................................................................................................13
3.10 Normal Freeze Down and Operation ..........................................................14
3.11 Mix Information ...........................................................................................15
3.12 Operation of Mix Pump ...............................................................................15
3.13 Mix Pump Cleaning ....................................................................................15
3.14 Disassembly and Inspection of Removable Parts ......................................16
Section Description Page
4 Maintenance and Adjustments
4.1 Freezer Adjustment ....................................................................................19
4.2 Product Consistency Adjustment ................................................................19
4.3 Locking the Control Panel ..........................................................................19
4.4 Obtaining Readings and Modifying Settings (Service Personnel Only) ......19
4.5 Readings (Service Personnel Only) ...........................................................20
4.6 Adjustments (Service Personnel Only) .......................................................21
4.7 Other Settings (Service Personnel Only) ....................................................21
4.8 Overrun Adjustment ....................................................................................22
4.9 Mix Pump Hose Reposition ........................................................................23
4.10 Mix Pump Hose Replacement ....................................................................23
4.11 Cab Temperature Adjustment ..................................................................... 24
4.12 Drive Belt Tension Adjustment ....................................................................24
4.13 Condenser Cleaning (Air-Cooled Freezers) ...............................................25
4.14 Preventative Maintenance ..........................................................................25
4.15 Extended Storage .......................................................................................25
5 Troubleshooting
5.1 Error Codes ................................................................................................27
5.2 Troubleshooting - Error Codes ...................................................................27
5.3 Troubleshooting - Machine .........................................................................29
5.4 Troubleshooting - Mix Pump .......................................................................30
6 Replacement Parts
6.1 Brushes, Decals and Lubrication ................................................................33
6.2 Auger Shaft and Front Door Parts ..............................................................34
6.3 Blender Parts and Drip Tray .......................................................................35
6.4 Cab Tubing Assembly .................................................................................36
SECTION 1
DESCRIPTION AND SPECIFICATIONS
1.1 DESCRIPTION
The SU412 is an ultra high capacity fl oor model shake
machine. It is equipped with fully automatic controls to
provide a uniform product. This manual is designed to
assist qualifi ed service personnel and operators with instal-
lation, operation and maintenance of the SU412 machine.
Figure 1-1 Model SU412 Machine
Figure 1-2 Machine Dimensions
Owner’s Manual #513625 Rev.3 1 SU412 Model Machines
1.2 SPECIFICATIONS
Model SU412
Dimensions Machine with crate
width 19-1/8’’ (48,6 cm) 27’’ (68,6 cm)
height 67’’ (170,2 cm) 78’’ (198,1 cm)
depth 38-3/4’’ (98,4 cm) 48’’ (121,9 cm)
Weight 450 lbs (204,1 kg) 650 lbs (294,8 kg)
Electrical 1 Phase, 208-240 VAC, 60Hz
circuit ampacity
overcurrent protection
device
Compressor 11,000 Btu/hr Scroll™ Compressor
Drive Motor 3/4 hp
Air Flow Air cooled units require 3” (7,6 cm) air space on both sides, 6” back.
Plumbing Fittings
Water cooled units require 1/2” N.P.T. water and drain fi ttings. Maximum water
pressure of 130 psi. Minimum water fl ow rate of 3 GPM. Ideal EWT of 50°-70°F
Hopper Volume 8 gallons (30,29 liters)
Freezing Cylinder
Volume
19A minimum
30A maximum
2.1 gallon (7,95 liters)
Owner’s Manual #513625 Rev.3 2 SU412 Model Machines
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.
ATTENTION: 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 fi nal 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.
2.3 MACHINE INSTALLATION
WARNING
Installation must be completed by a qualifi ed
electrician/refrigeration specialist.
Incorrect installation may cause personal injury,
severe damage to the machine and will void factory warranty.
A. Uncrate the machine.
B. Install the four casters. Turn the threaded end
into the machine until no threads are showing. T o
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 a
minimum of 3” (7,5cm) of space on all sides and
10” (25cm) at the top for proper circulation. (Fig.
2-1)
Figure 2-1 Space and Ventilation Requirements
E. Machines that have a water cooled condenser
require 1/2” NPT supply and drain fi ttings.
2.4 INSTALLING PERMANENT WIRING
To install wiring follow the steps below:
A. Refer to the nameplate on the side panel of the
machine for specifi c 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.
Installation of the machine involves moving the machine
close to its permanent location, removing all crating, setting in place, assembling parts, and cleaning.
Owner’s Manual #513625 Rev.3 3 SU412 Model Machines
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 fi tting
(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 T ee 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 SU412 machine may be connected to the standard
mix container or up to three prepacked mix bags. Follow
the instructions below that match your confi guration.
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.
Owner’s Manual #513625 Rev.3 4 SU412 Model Machines
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
fl ow 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 fi tting 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):
The position of the three bags in the mix container is important. The bag that is connected nearest the outlet of
the manifold drains 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.
Owner’s Manual #513625 Rev.3 5 SU412 Model Machines
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
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):
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 suffi cient 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)
Owner’s Manual #513625 Rev.3 6 SU412 Model Machines
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. Wear proper clothing. Avoid loose fi tting 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. Disconnect power for maintenance. Never
attempt to repair or perform maintenance on the
machine until the main electrical power has been
disconnected.
G. Do not operate under unsafe operating conditions.
Never operate the machine if unusual or excessive
noise or vibration occurs.
3.2 OPERATING CONTROLS AND
INDICATORS
Before operating the machine, it is required that the operator know the function of each operating control. Refer
to Figure 3-1 for the location of the operating controls on
the machine. For the information regarding error codes
displayed on the control panel, refer to the troubleshooting
section of this manual.
A. MAIN FREEZER POWER SWITCH
The Main Freezer Power switch is a two position rocker
switch that supplies power to the IntelliT ec™ control, freezing cylinder circuits lower cabinet refrigeration system.
When the switch is placed in the ON position, the cabinet
refrigeration system will run until the preset temperature
is reached; then it will cycle ON and OFF to maintain that
temperature. Power to the freezing cylinders can then be
controlled with the Freezing Cylinder OFF/ON switch.
B. FREEZING CYLINDER OFF/ON SWITCH
The Freezing Cylinder OFF/ON switch is a two position
toggle switch used to supply power to the freezing cylinder
control circuit. When the switch is in the OFF position,
the freezing cylinder’s refrigeration system and auger do
not operate. When the switch is in the ON position, the
machine is operational.
Main Freezer
Power Off/On
Cab Off
Indicator Light
Blender Power Off/
On Circuit Breaker
Freezing
Cylinder
Off/On
IntelliT ec™ Control
(See Figure 3-2)
Pump
Off/On
Figure 3-1 Machine Controls
Owner’s Manual #513625 Rev.3 7 SU412 Model Machines
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