Stoelting U3-02A Service Manual
U3-02A Mix Pump
Owner's/Service Manual
Manual No. 513606 Rev. 0, April, 2004
INTRODUCTION
U3-02A MIX PUMP - OWNER'S / SERVICE MANUAL
This manual provides basic information about the mix pump and its components. Instructions and suggestions are
given covering its basic operation and care.
The illustrations and specifications are not binding in detail. We reserve the right to make changes at any time without
notice to mix pump or components without incurring any obligation to equip same on mix pump built prior to date of
change.
DO NOT ATTEMPT to operate the mix pump until instructions and safety precautions in the manual are read completely
and thoroughly understood. The mix pump should be operated only by qualified personnel. If problems develop or
questions arise in connection with the installation, operation, or servicing of the mix pump, contact your local distributor
or the company at the following location:
STOELTING, LLC Ph: 920-894-2293
502 HWY. 67
KIEL, WISCONSIN 53042-1600 Fax: 920-894-7029
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. As with any machine, there are
hazards associated with their operation. For this
reason safety is emphasized throughout the manual.
T o 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 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 cont ains
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 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 ....................................................................................................................................... 10
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
WARRANTY........................................................................................................................................................... 23
LIST OF ILLUSTRATIONS
Figure Description Page
1 U3-02A 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 3-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........................................................................................................ 22
SECTION 1
INTRODUCTION
1.1 DESCRIPTION
The Model U3-02A 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 U3-02A Pump keeps mix handling
to a minimum.
Stoelting’s Model U3-02A 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 and conveniently. Second, the U3-02A
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, 115 volts. Approximately 1.6 total running amps.
Cord and plug attached.
WARRANTY
One year parts.
UL, C-UL Approved, NSF Approved
Figure 1
U3-02A 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, LLC
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.
WARNING
Risk of Personal Injury/property Damage
V erify electrical and refrigeration line location inside
and behind the cooler's walls defore drilling.
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.
COOLER WALL
10 FT. LIFT
MAXIMUM
PUMP
CHECK
VALVE
MIX
CONTAINER
7.Mount pump to bracket with wing nuts. Pump will
be held above the bracket by the standoffs.
REFRIGERATION
UNIT FOR MIX LINE
20 FT. MAXIMUM
Figure 2
Mix Transfer Line
3
FREEZER
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