Stoelting U3-02 Operators Manual
Model U3-02
OPERATORS MANUAL
Manual No. 513557
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 1 — INTRODUCTION ............................................................................................................................ 1
1.1 Description ..................................................................................................................................................... 1
1.2 Specifications ................................................................................................................................................. 1
SECTION 2 — INST ALLATION INSTRUCTIONS................................................................................................... 3
2.1 Shipment and Transit ..................................................................................................................................... 3
2.2 National Sanitation Foundation Compliance Requirements............................................................................ 3
2.3 Installation ...................................................................................................................................................... 3
2.4 Mix Pump Check Out ..................................................................................................................................... 5
SECTION 3 — OPERA TION INSTRUCTIONS ....................................................................................................... 7
3.1 Safety Precautions ......................................................................................................................................... 7
3.2 Pump Motor Switch ........................................................................................................................................ 7
3.3 Operation Of U3 Mix Pump............................................................................................................................ 7
3.4 Cleaning......................................................................................................................................................... 8
3.5 Disassembly and Inspection of Removable Parts.......................................................................................... 8
3.6 Sanitizing and Startup.................................................................................................................................... 9
3.7 Cleaning Mix Lines ......................................................................................................................................... 9
SECTION 4 — MAINTENANCE INSTRUCTIONS ............................................................................................... 11
4.1 Overrun Adjustment .......................................................................................................................................11
4.2 Preventative Maintenance ..............................................................................................................................11
SECTION 5 — TROUBLESHOOTING ................................................................................................................ 13
SECTION 6 — REPLACEMENT P ARTS INFORMATION .................................................................................... 15
6.1 How to Order Replacement Parts................................................................................................................. 15
6.2 Parts List and Reference Drawings ............................................................................................................. 15
LIST OF ILLUSTRATIONS
Figure Description Page
1 U3 Pump ................................................................................................................. 1
2 Mix Transfer Line .................................................................................................... 3
A Mix Pump Hose ...................................................................................................... 4
B Pickup Hose ........................................................................................................... 4
C Pickup Hose ........................................................................................................... 4
3 Mix Pump Installation.............................................................................................. 5
D 4-way Tee Connection ............................................................................................. 5
4 Pump Motor Switch................................................................................................. 7
5 Mix Pump Operation ............................................................................................... 8
6 Removing Parts ...................................................................................................... 8
7 Overrun Adjustment................................................................................................ 11
8 Reposition Mix Pump Hose..................................................................................... 12
9 Pump Roller Assembly............................................................................................ 12
10 Pump and Decal Assembly ..................................................................................... 15
Exploded Parts Illustrations..................................................................................... 17-21
Wiring Diagram........................................................................................................ 23
SECTION 1
INTRODUCTION
1.1 DESCRIPTION
The Model U3 Remote Mix Pump is specially designed for
use with Stoelting remote pressurized freezers. Used with
large capacity mix containers located in your bulk storage
cooler, the U3 Pump keeps mix handling to a minimum.
Stoelting’s Model U3 Remote Mix Pump performs three
important functions with precision and reliability. First, it
transfers a continuous supply of mix from your remote
storage container to the freezing cylinder of your freezer quickly, conveniently. Second, the U3 Pump precisely
injects a preset amount of air into the mix, maintaining
overrun to assure maximum profitability. Third, it pressurizes the freezing cylinder, forcing frozen product through
the spigot at the rapid dispense rates needed by high
volume locations.
1.2 SPECIFICATIONS
WEIGHT
24 lbs. (10.89 kg)
DIMENSIONS
Width: 9-3/4" (24.8 cm)
Height: 8-1/2" (21.6 cm)
Depth: 10-1/8" (25.7 cm)
ELECTRICAL
1 phase, 120 volts. Approximately 1.6 total running amps.
Cord and plug attached.
WARRANTY
One year parts.
UL, C-UL Approved, NSF Approved
Figure 1
U3 Pump
1
2
SECTION 2
INSTALLATION INSTRUCTIONS
2.1 SHIPMENT AND TRANSIT
The mix pump has been completely assembled, operated
and inspected at the factory. Upon arrival at the final
destination, the mix pump must be checked for any
damage that may have occurred during transit.
The mix pump should arrive in satisfactory condition. THE
CARRIER IS RESPONSIBLE FOR ALL DAMAGE IN
TRANSIT, WHETHER VISIBLE OR CONCEALED. Do not
pay the freight bill until you have checked the equipment.
Have the carrier note any visible damage on the freight bill.
If concealed damage and/or shortage is found later, advise
the carrier inspector within 10 days and request inspection. The customer must place claim for damages and/or
shortages in shipment with the carrier. Stoelting, Inc.
cannot make any claims against the carrier.
2.2 NATIONAL SANITATION FOUNDATION
COMPLIANCE REQUIREMENTS
In order to comply with "NSF International" (NSF) code #6:
A. This unit (remote pump) must be installed with a
“NSF” listed refrigerated mix transfer line. The mix
transfer line must be pitched to cooler, with no sags
or low points, to allow complete drainage (Fig. 2).
B. The product at the mix pump and in transfer lines
must be maintained below 41°F (5°C.)
2.3 INSTALLATION
A. Follow the steps below to install the mix pump in an
upright position on the wall using optional pump
mounting kit. Allow clearance for a mix container
under pump. See Figure 2.
1.Mount by locating four (4) hole centers on cooler
wall using mounting bracket as template.
CAUTION
KNOW THE COOLER'S WALL DESIGN BEFORE
DRILLING TO PREVENT PERSONAL INJURY OR
PROPERTY DAMAGE.
2.Drill four (4) 1/2 inch diameter holes into cooler
wall 3/4 inch deep. See Figure 3.
3.Insert well-nut to flange and apply silicone sealant
around outside diameter of flange and cooler wall.
4.Repeat steps 2 & 3 for other located hole centers.
5.Mount bracket to cooler wall with supplied wing
screws. Hand tighten until secure.
6.Thread plastic standoffs (small parts bag) onto all
three pump mounting studs located under the
pump until bottomed.
7.Mount pump to bracket with wing nuts. Pump will
be held above the bracket by the standoffs.
COOLER WALL
10 FT. LIFT
MAXIMUM
PUMP
CHECK
VALVE
MIX
CONT AINER
20 FT. MAXIMUM
FREEZER
REFRIGERATION
UNIT FOR MIX LINE
Figure 2
Mix Transfer Line
3
B. Mix Pump Hose Installation.
Follow the steps below to install the mix pump hose.
1. Turn pump on.
2. Feed one end of mix pump hose into the entering or
pick-up hose side (left) of black cover.
3. Gently push the hose into the black cover until it begins
to feed. See Figure A.
Figure B
7. Turn pump on.
Figure A
4. Allow the hose to feed itself thru the pump until 6"
remains on the entering side.
5. Turn pump off.
6. Connect mix pump hose to pickup hose adapter using
small hose clamp. See Figure B.
CAUTION: DO NOT TWIST MIX PUMP HOSE.
8. Gently pull on the discharge hose to help remaining 6"
of mix pump hose to feed thru pump until hose adapter
prevents further feeding.
9. Turn pump off. See Figure C.
Figure C
4
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