Vollrath Stoelting U411 User manual

Model U411
SERVICE MANUAL
Manual No. 513688 Rev.0

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
1.3 Component Settings ................................................................................... 3
2 Refrigeration and Wiring Diagrams
2.1 Refrigeration Diagram ................................................................................ 5
2.2 Wiring Diagrams ......................................................................................... 6
3 Replacement Parts
3.1 Brushes, Decals & Lubrication ................................................................... 9
3.2 Trays........................................................................................................... 9
3.3 Auger Shaft & Front Door Parts.................................................................. 10
3.4 Cab Tubing ................................................................................................. 11
3.5 Pump Parts................................................................................................. 12
3.6 Spigot Assembly ......................................................................................... 14
3.7 Panels & Screws ........................................................................................ 14
3.8 Cab Components........................................................................................ 15
3.9 Electrical Components................................................................................ 16
3.10 Cab Condensing Unit ................................................................................. 17
3.11 Kits & Miscellaneous .................................................................................. 17
3.12 Motor Assembly .......................................................................................... 18
3.13 Right Side ................................................................................................... 19
3.14 Left Side ..................................................................................................... 20
TABLE OF
CONTENTS

Service Manual #513688 Rev.0 1 U411 Model Machines
1.1 DESCRIPTION
The Stoelting U411 floor model machine is pressure fed.
It is equipped with fully automatic controls to provide a
uniform product.
This manual is designed to assist qualified service person-
nel with information regarding the refrigeration and wiring
specifications, replacement parts and settings of the U411.
SECTION 1
DESCRIPTION AND SPECIFICATIONS
Figure 1-2 Dimensions
Figure 1-1 Model U411 I2 Machine

Service Manual #513688 Rev.0 2 U411 Model Machines
1.2 SPECIFICATIONS
Model U411
Dimensions Machine with crate
width 19-1/8’’ (48,6 cm) 27’’ (68,6 cm)
height 68-3/8’’ (173,7 cm) 78’’ (198,1 cm)
depth 37-5/8’’ (95,6 cm) 48’’ (121,9 cm)
Weight 450 lbs (204,1 kg) 650 lbs (294,8 kg)
Electrical 1 Phase, 208-240 VAC, 60Hz 3 Phase, 208-240 VAC, 60Hz
running amps 18A 15A
connection type NEMA L6-30P NEMA L15-30P
Compressor 15,000 Btu/hr Scroll™ Compressor
Cabinet - 1,300 Btu/hr Compressor (R-134a)
Drive Motor 2 hp
Air Flow Air cooled units require 3” (7,6 cm) air space at the back and sides.
Plumbing Fittings Water cooled units require 1/2” N.P.T. water and drain fittings.
Hopper Volume 8 gallons (30,29 liters)
Freezing Cylinder
Volume 1.33 gallon (5,03 liters)
U411
Refrigerant R-404A
Charge (W/C) 26 oz
(A/C) 40 oz
Suction Pressure
(at 72°F) 19-21 psig
Discharge Pressure 220-230 psig
Cabinet
Refrigerant R-134A
Charge 8 oz
Cab Suction
Pressure 33 psig

Service Manual #513688 Rev.0 3 U411 Model Machines
1.3 COMPONENT SETTINGS
Following are the settings for the components in the
U411 I2 machine.
A. COMPRESSOR WINDINGS
When testing the compressor windings the resistance
through the windings should be as follows:
B. CAPACITORS
Refer to the following table for the capacitance of all the
capacitors in the machine:
C. PUMP PRESSURE SWITCH
The pump pressure switch, located in the cabinet, main-
tains 21-24 psig in the mix line.
°F Resistance °F Resistance
-22 176950 40 26100
-20 165200 42 24725
-18 154300 44 23400
-16 144200 46 22175
-14 134825 48 21000
-12 126125 50 19900
-10 118050 52 18875
-8 110550 54 17900
-6 103550 56 17000
-4 97075 58 16125
-2 91025 60 15325
0 85400 62 14550
2 80150 64 13825
4 75275 66 13150
6 70725 68 12500
8 66475 70 11875
10 62500 72 11300
12 58800 74 10750
14 55325 76 10250
16 52100 78 9750
18 49075 80 9300
20 46250 82 8850
22 43600 84 8450
24 41125 86 8050
26 38800 88 7675
28 36625 90 7325
30 34575 92 7000
32 32675 94 6675
34 30875 96 6375
36 29175 98 6100
38 27600 100 5825
D. TEMPERATURE CONTROL SENSOR
The following table shows the relationship between the
thermistor resistance and the suction line temperature.
Rating
Capacitor Part MFD VAC
Compressor - Start 230638 88-106 MFD 330 VAC
Compressor - Start 231049 88-106 MFD 330 VAC
Compressor - Run 230653 40 MFD 370 VAC
Compressor - Run 231048 40 MFD 440 VAC
Motor - Start 230622 200 MFD 250 VAC
Motor - Run 231075 30 MFD 370 VAC
Fan Motor 230654 5 MFD 400 VAC
Cab Compressor 230667 80 MFD 300 VAC
Compressor Electrical S to C R to C
282076 1 PH 3.31Ω1.28Ω
282116 1 PH 1.70Ω1.02Ω
282117 3 PH 1.91Ω1.54Ω
282111 1 PH 16.40Ω10.20Ω

Service Manual #513688 Rev.0 4 U411 Model Machines

Service Manual #513688 Rev.0 5 U411 Model Machines
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SECTION 2
REFRIGERATION AND WIRING DIAGRAMS
2.1 REFRIGERATION DIAGRAM

Service Manual #513688 Rev.0 6 U411 Model Machines
2.2 WIRING DIAGRAMS
41
01
032
1ENIL 2ENIL
ETIHWETIHW
TUPNI
NWORB
KCALB
MMOC
V802
V032
V802
V032
802
DW-1164022
1P2P
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5T
ZH06 658225
53
33
GNIRIWROTOMEVIRD
ROTOMNOSEEL
18
DER
DER
KCALB
KCAL
BDER
DER
EGNARO
85
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KCALB
7
5
NAFBAC
6434
EGNARO
54
EULB
14
44
24 45
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08
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32145
1L
786
NIP9
STUPTUOTHGI
R
78645
STUPTUOTF
EL
3
1L
12
NIP8
8797
NWORB
LIOCEVIRD
77
LIOCROSSERPMOC
47
ROSNES
YALPSID
432
57
86
HCTIWSOCPH
HCTIWSROODBAC 07
27
5748 6
EPIRTS
ETIHW/WKCALB
EPIRTSETIHW/WEGNARO
EPIRTSETIHW/WEULB
TWSTOGIPS
TWSKCOLRETNIROOD
EPIRTSKCALB/WDER
867
2L
37
17
96
67
9
XIM
PMUPXIM
DER
KCALB
1525
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94
74
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05 84
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03KCALB
R
S
35
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TS
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5
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EULB
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1
73
2
63
WOLLEY
DER
32
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52
DER
04
PACNUR 93
KCAL
B
321654
TFEL
1
3
78
21
TFEL SERP SEBORPPMET
SEBORPLE
VELDIUQIL THGIR
231
465231
4312
NWORB
EGNARO
KCALB
NEERG
456 5
2L2
11L
K
CALB
46
DER
THGIR DIOROT
THGIR SERP
56
YARG YARG
4231
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E
TIHW
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KCALBRODER
06
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16
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KCAJERIWKCALB
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TFEL DIORO
T
ETIHW
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KCALB
22
82
02
33
62
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EVIRD ROTOM
53
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7666
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C
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24
KCAB MORFDEWEIV CLIATED
14
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17
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LP SROTCENNOC
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54
802
V
64
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VEGNARO
EULB
34
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C
BAC ROSSERPM
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31 11
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RS
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EULB
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KCALB
DER
YARG
REMROFSNART HCTIWS )YLNORIA(
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5
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Service Manual #513688 Rev.0 7 U411 Model Machines
41
01
89
615141
01
032
1ENIL 2ENIL
ETIHWETIHW
TUPNI
NWORB
KCALB
MMOC
V802
V032
V802
V032
802
DW-4164022
18
KCALB
KCALB
KCALB
KCAL
BDER
KCALB
EGNARO
85
KCALBKCALB
KCALB
75
NAFBAC
6434
EGNARO
54
EULB
14
44
24 45
REMROFSNART HCITW
S)CLIATEDEES(
08
EULB
32145
1L
786
NIP9
STUPTUOTHGIR
78645
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3
1L
12
NIP8
8797
NWORB
LIOCEVIRD
77
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47
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SNES
YALPSID
432
57
86
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27
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74
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OTICAPAC
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3
78
21
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SEBORPLEVELD
IUQIL THGIR
231
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4312
NWORB
EGNARO
KCALB
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456 5
2L2
11L
KCALB
46
DER
THGIR DIOROT
THGIR SERP
56
YARG YARG
4231
ETIHW ETIHW
ETIHW
KCALBRODER
06
TWSERUSSERP
16
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KCALBRODER
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CAJERIWNEERG
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EPIRTSKCALB/WKNIP
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KCALB KCALB
3L
1L
KCALB
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82
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33
62
DER
XO
BNOITCNUJ
EVIRD ROTOM
53
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TIWS
7666
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SEHCTIWSTOGIPS )NEPODLEHCN( 24
KCA
BMORFDEWEIV CLIATED
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C
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31 11
21 01
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RS
C
NWORB
NWORB
EULB
41
1L2L3LN KCOLBLANIMRET
KCALB
KCALB
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72
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43
YARG
2LDER
DER
DER
NWORB
REMROFSNART HCTIWS )YLNORIA(
YARG
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1L
1T2T
2L
3L2L
3T2T
1L 1T
1T
1L
2T3T
2L3L
SIHT NOITCES RIAROF DELOOC YLNO
ROSNESREDNILYC TEKCAJERIWKCALB
EGNARO
KCALB
EGNARO
KNIP
EULB ETIHW
REMROFSNART
ROSSERPMOC ROTCATNOC
EVIRD ROTCATNOC
KCALB DER
YARG
DER
YARG
DAOLREVO
9304
6959
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NAFBAC ROTOM
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YARG
WOLLEY
DER
KCALB
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EULB
DER
YARG
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GNICIVRESEROFEBYLPPUSREWOPTCENNOCSID
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3 7
2 64
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1P 1T
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Service Manual #513688 Rev.0 8 U411 Model Machines

Service Manual #513688 Rev.0 9 U411 Model Machines
SECTION 3
REPLACEMENT PARTS
3.1 BRUSHES, DECALS & LUBRICATION
Part Number Description Quantity
208135 Brush - 4” X 8” X 16” (Barrel) 1
208380 Brush - 1/4” X 3” X 14” 1
208387 Brush - 5” X 1/2” X 24” 1
208465 Brush - 1” X 3-1/2” X 18” 1
208467 Brush - 3/8” X 1” X 5” 1
236067 Card - Cleaning Instruction 1
324065 Decal - Water Inlet 1
324105 Decal - Caution Electrical Shock 6
324106 Decal - Caution Electrical Wiring Materials 1
324107 Decal - Caution Hazardous Moving Parts 3
324141 Decal - Caution Rotating Blades 1
324200 Decal - Manual Reset 1
324208 Decal - Attention Refrigerant Leak Check 2
324509 Decal - Cleaning Instructions 1
324566 Decal - Wired According To 1
324584 Decal - Adequate Ventilation 3” 3
324803 Decal - Domed Stoelting Logo (Large) (Header Panel) 1
324859 Decal - Domed Dairy Queen Logo (Header Panel) 1
324888 Decal - Fan Motor Reset 1
324901 Decal - Transformer Switch 1
324909 Decal - USB Port 1
324942 Decal - Thermistor ID 1
508048 Lubricant - Spline (2 oz Squeeze Tube) 1
508135 Petrol Gel - 4 oz Tube 1
513680 Manual - Owner’s 1
513687 Manual - Owner’s (DQU411) 1
636073 DVD - Start-Up & Cleaning 1
1998209 Overrun Quick Reference 1
1998210 Card - Cleaning Instructions (DQ) 1
C-1000-26C Decal - Made In USA 1
Part Number Description Quantity
417006 Grid - Drip Tray (Metal) 1
744273 Tray - Drip 1
744614 Condensate Pan (Under Cab) 1
744617 Tray - Drain 1
3.2 TRAYS
744614
417006
744273
744617
744614
417006
744273
744617

Service Manual #513688 Rev.0 10 U411 Model Machines
Part Number Description Quantity
149003 Bushing - Front Auger Support 1
232734 Cap - Rosette 1
381804 Auger Flight 6
482004 Knob (Air Bleed Valve) 1
482019 Knob - Front Door (Black) 2
624520 O-Ring - Air Bleed Valve - Black 1
624598 O-Ring - Spigot - Black 2
624677 O-Ring - Spigot Extension - Black 1
624678 O-Ring - Rear Seal - Black 2
625133 O-Ring - Front Door - Black 1
667868 Seal - Rear Auger (Orange) 1
694200 Spring - Air Bleed Valve 1
694255 Spring - Auger Flight 6
1151859 Adapter - Rear Seal (Code 1) 1
2104552 Support - Front Auger 1
2177072 Extension - Spigot - 1.5” 1
2177073 Extension - Spigot - 2.5” 1
2177074 Extension - Spigot - 3.2” 1
2183106 Valve - Air Bleed (Front Door) 1
2187696 Front Door 1
2204252 Spigot Body 1
4151178 Auger Shaft 1
3.3 AUGER SHAFT & FRONT DOOR PARTS
667868
1151859
624678
694255
4151178
381804
149003
2104552
232734
624677
2177073
624598
625133
2204252
624520
694200
2183106
2187696
482004
482019
667868
1151859
624678
694255
4151178
381804
149003
2104552
232734
624677
2177073
624598
625133
2204252
624520
694200
2183106
2187696
482004
482019

Service Manual #513688 Rev.0 11 U411 Model Machines
3.4 CAB TUBING
Part Number Description Quantity
264235 Clamp - Metal (1/4” ID Tubing) 4
264241 Clamp - Metal (1/2” ID Tubing) 4
376041 Tee Connector - 3-Way (Stainless) 1
376097 Elbow - Barbed (1/2”- 1/4”) 1
558109 Mix Container Only 1
624607-5 O-Ring - Check Valve Body - Black (5 Pack) 2
694247 Spring - Check Valve 1
696152 Clip - Lock (Check Valve) 1
756067 Tubing - 1/4” ID - Clear - Air Line (25’ Increments) (Per Inch) 13”
756088 Tubing - 1/2” ID - Clear - Mix Line (25’ Increments) (Per Inch) 21”
and 6”
756204 Tubing - 1/4” ID - Pump (50’ Box Only) (Per Inch) -
756204-40 Tubing - 1/4” ID - Pump (Pre-Cut 40” Piece) 1
762256 Check Valve - Mix Outlet 1
1172864 Check Valve - Mix In Line (Outer) 1
2177274 Clip - Retaining (Mix Probe To Cover) 1
2203792 Pick-Up Tube - Mix 1
3177229 Cover - Rear (Mix Container) 1
3177262 Cover - Front (Mix Container) 1

Service Manual #513688 Rev.0 12 U411 Model Machines
Part Number Description Quantity
128283 Crank Arm Roller Assy (Requires #652412) (Cab) 1
128295 Rocker Arm Assembly w/Screw (Cab) 1
128296 Piston & Cylinder Sleeve Assembly (Pump) (Cab) 1
376035 Tee Connector - Air Pressure Switch (Cab) 1
432003-SV Valve Head Only w/Tubes (Pump) (Cab) 1
522229 Motor - Pump (Cab) 1
538306 Nut - Motor Mounting (Cab) 4
644065 Screw - Rocker Arm (Cab) 1
650146 Set Screw - Pulley (Cab) 1
652412 Screw - Shoulder (Crank Arm Roller Assembly) (Cab) 1
653042 Screw - Thumb (Cover Clamp) (Cab) 4
667896 Seal - Bumper (Piston) (Pump) (Cab) 1
717928 Switch - Pressure (Pump) (Cab) 1
762246 Check Valve - Air Line (Stainless) (Cab) 1
766058 Washer - Lock - Motor Mounting (Cab) 4
1171860 Spring - Check Valve (Pump) (Cab) 1
1171861-SV Needle Valve w/O-Ring (Pump) (Cab) 1
1171862 Screw - Air Filter Retainer (Cab) 1
1171863 Valve Guide (Pump) (Cab) 1
1171864 O-Ring - Needle Valve (Pump) (Cab) 1
1171866 Screw - Valve Head (Cab) 5
1171867 O-Ring (Pump Cylinder Sleeve) (Cab) 1
1171868 Reed Valve (Pump) (Cab) 1
1171870 Cylinder Sleeve (Pump) (Cab) 1
1171871 Spring - Piston (Cab) 1
1171872 Piston Spring Seat (Cab) 1
1171873 Piston (Pump) (Cab) 1
1171874 Ball Bearing - Single (Pump Rocker Arm) (Cab) 1
1171955 Set Screw - Eccentric (Cab) 1
1171956 Washer - Crank Arm - Nylon (Cab) 1
1171958 Filter - Air (Pump) (Cab) 1
1171959 O-Ring (Piston) (Pump) (Cab) 1
1171978 Screw - Crank Arm (Cab) 1
1171979 Crank Arm (Cab) 1
1171980 Pulley - Large (Pump) (Cab) 1
1171981 Eccentric (Cab) 1
1171982 Knob - Crank Arm Overrun Setting (Cab) 1
1171983 Dial - Crank Arm Overrun Setting (Cab) 1
1171984 Pointer - Crank Arm Overrun Setting (Cab) 1
1171985 Dowel Pin - Rocker Arm (Cab) 1
1171986 Flange Bearing - Rocker Arm (Cab) 2
1171987 Wick - Rocker Arm (Cab) 1
1171988 Collar - Rocker Arm Dowel Pin (Cab) 1
1171989 Pulley - Small (Cab) 1
1171990 Belt (Pump) (Cab) 1
1171994 Sleeve Bearing - Crank Arm (Cab) 1
1177033 Bumper Ring (Piston) (Pump) (Cab) 1
1177034 Air Filter Retainer - Top (Cab) 1
1177035 Air Filter Retainer - Bottom (Cab) 1
1177036 Washer - Air Filter Retainer (Cab) 1
1177037 Screw - Air Filter (Cab) 1
1177681 Rocker Arm (Cab) 1
2177812 Roller Carrier Assembly Kit (Cab) 1
2183067 Pump Body Casting (Cab) 1
3171952 Cover - Clamp (Two Piece Black) (Cab) 1
4183089 Pump Assembly w/Motor 1
3.5 PUMP PARTS

Service Manual #513688 Rev.0 13 U411 Model Machines

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

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 
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
 
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
 
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
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












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


3.5 PUMP PARTS (CONTINUED)

Service Manual #513688 Rev.0 14 U411 Model Machines
Part Description Quantity
428045 Knob - Spigot Handle (Black) 1
428082 Handle Assembly (General Market) 1
482039 Knob - Spigot Handle (Black) 1
539043 Nut - Spigot Adjustment 1
570961 Pin - Cotterless Clevis (Spigot Handle) 1
625440 Retaining Ring - Spigot Handle 1
694247 Spring - Cone (Spigot Cam) 1
696044 Spring - Torsion (Spigot Handle) 1
718773 Switch - Limit (Spigot) 1
1154703 Washer (Spigot Handle) 1
2158082 Glide - Spigot Socket 1
2187805 Handle - Spigot (Handle Only) 1
2204726 Bushing - Spacer (Spigot Handle) 1
2204729 Handle Only (DQ) 1
2204723 Spigot Cam 1
2204732 Cam Assembly (DQ) 1
3.6 SPIGOT ASSEMBLY
Part Description Quantity
584200-37 Hole Plug - L.H. Side Panel 1
647653 Screw - Panel (Top) -
647899 Screw - Panel (Side & Rear) & Cab (Door Handle) -
2204286 Panel - Drip Tray Support 1
2204329 Panel - Top (Air-Cooled) 1
2204339 Panel - R.H. Side 1
2204340 Panel - L.H. Side 1
2204555 Panel - Top (Water-Cooled) 1
2204635 Panel - Header 1
2204641 Panel - Rear 1
3.7 PANELS & SCREWS
1154703
625440
2204726
2204729
2204723
539043
694247
718773
482039
1154703
625440
2204726
2204729
2204723
539043
694247
718773
482039
718773
570961
694247
2158082
696044
2187805
428045
718773
570961
694247
2158082
696044
2187805
428045