Stoelting F431 User manual

Model F431
SERVICE MANUAL
Manual No. 513605 Rev.3

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 Introduction
1.1 Description.................................................................................................. 1
1.2 Specifications ............................................................................................. 2
1.3 Modes of Normal Operation ....................................................................... 3
A. Initial Status..........................................................................................................3
B. Serve Mode..........................................................................................................3
C. Standby Mode......................................................................................................3
D. Sleep 1 Mode.......................................................................................................4
E. Sleep 2 Mode.......................................................................................................4
F. IntelliTec Restart (Version 3.5 or Higher) .............................................................4
G. Sleep 3 Mode (Version 3.5 or Higher).................................................................. 4
H. Clean Mode..........................................................................................................5
1.4 Mix Level Indicators.................................................................................... 5
1.5 Storage Refrigeration ................................................................................. 5
1.6 Operation During Sensor Failure................................................................ 5
A. Serve and Standby Mode.....................................................................................5
B. Cabinet Refrigeration ...........................................................................................5
1.7 Motor Profile Cutout Compensation ........................................................... 5
2 Installation Instructions
2.1 Safety Precautions ..................................................................................... 7
2.2 Shipment and Transit.................................................................................. 7
2.3 Machine Installation ................................................................................... 8
2.4 Installing Permanent Wiring........................................................................ 8
2.5 Mix Pump.................................................................................................... 8
A. Mix Pump Hose Installation..................................................................................8
B. Mix Pickup Hose Installation ................................................................................9
C. Mix Low Level Indicator Adjustment.....................................................................12
3 Initial Set-Up and Operation
3.1 Safety Precautions ..................................................................................... 13
3.2 Operating Controls and Indicators.............................................................. 13
3.3 Important Information Regarding Cleaning and Sanitizing ......................... 15
3.4 Disassembly of Machine Parts ................................................................... 16
A. Disassembly of Front Door...................................................................................16
B. Disassembly of Auger ..........................................................................................17
3.5 Cleaning Disassembled Parts .................................................................... 17
3.6 Sanitizing Machine Parts ............................................................................ 17
3.7 Cleaning the Machine................................................................................. 18
3.8 Assembling Machine .................................................................................. 18
SECTION 1
INTRODUCTION

Section Description Page
3.9 Sanitizing .................................................................................................... 19
3.10 Initial Freeze Down and Operation ............................................................. 20
A. Adding Mix ...........................................................................................................20
B. Preparing IntelliTec Control..................................................................................21
C. Initial Freeze Down ..............................................................................................21
D. Adjusting IntelliTec Control...................................................................................21
E. Serving Product....................................................................................................21
3.11 Normal Freeze Down and Operation.......................................................... 22
3.12 Mix Information ........................................................................................... 22
3.13 Operation of Mix Pump............................................................................... 23
3.14 Mix Pump Cleaning .................................................................................... 23
3.15 Disassembly and Inspection of Removable Parts ...................................... 23
4 Maintenance and Adjustments
4.1 Machine Adjustment ................................................................................... 25
4.2 Product Consistency Adjustment................................................................ 25
4.3 Locking the Control Panel .......................................................................... 25
4.4 Obtaining Readings and Modifying Settings (Service Personnel Only)...... 25
4.5 Readings (Service Personnel Only) ........................................................... 26
4.6 Adjustments (Service Personnel Only)....................................................... 27
4.7 Other Settings (Service Personnel Only).................................................... 27
4.8 Overrun Adjustment.................................................................................... 28
4.9 Mix Pump Hose Reposition ........................................................................ 29
4.10 Mix Pump Hose Replacement .................................................................... 29
4.11 Cab Temperature Adjustment ..................................................................... 30
4.12 Drive Belt Tension Adjustment.................................................................... 30
4.13 Condenser Cleaning (Air-Cooled Machines) .............................................. 31
4.14 Preventative Maintenance .......................................................................... 31
4.15 Extended Storage....................................................................................... 31
5 Refrigeration System
5.1 Refrigeration System .................................................................................. 33
5.2 Refrigerant Recovery and Evacuation........................................................ 33
A. Refrigerant Recovery ...........................................................................................34
B. Evacuating the Refrigeration System...................................................................34
5.3 Refrigerant Charging .................................................................................. 34
5.4 Compressor ................................................................................................ 35
5.5 Condenser .................................................................................................. 36
5.6 Evaporator .................................................................................................. 36

Section Description Page
5.7 Valves ......................................................................................................... 36
A. Thermostatic Expansion Valve (TXV) .................................................................. 36
B. Check Valve .........................................................................................................37
C. High Pressure Cutout...........................................................................................37
D. Hot Gas Bypass ...................................................................................................38
E. Evaporator Pressure Regulator (EPR).................................................................39
F. Water Valve (Water Cooled Models Only)............................................................ 40
5.8 Solenoid...................................................................................................... 40
5.9 Filter Drier................................................................................................... 42
5.10 Capillary Tube & Drier Assembly ................................................................ 42
5.11 Cab Unit...................................................................................................... 43
6 Electrical and Mechanical Control Systems
6.1 IntelliTec Controller ..................................................................................... 45
6.2 Contactors .................................................................................................. 45
6.3 Drive Motor ................................................................................................. 46
6.4 Capacitors .................................................................................................. 47
6.5 Gearbox...................................................................................................... 47
6.6 Condenser Fan Motor (Air-Cooled Only).................................................... 48
6.7 Cab Condenser Fan Motor ......................................................................... 48
6.8 Switches ..................................................................................................... 48
A. Spigot Switch .......................................................................................................48
B. Pump Pressure Switch.........................................................................................50
6.9 Temperature Control Sensor ...................................................................... 50
7 Troubleshooting
7.1 Error Codes ................................................................................................ 51
7.2 Troubleshooting .......................................................................................... 51
7.3 Servicing Tip ............................................................................................... 53
7.4 Troubleshooting Machine ........................................................................... 54
7.5 Troubleshooting Mix Pump ......................................................................... 55
8 Replacement Parts
8.1 Front Door and Auger Parts........................................................................ 57
8.2 Cab Tubing Assembly................................................................................. 58
8.3 Spigot Cam Assembly ................................................................................ 59
8.4 Rear of Machine ......................................................................................... 60
8.5 Right Hand Side and Header Panel ........................................................... 61
8.6 Left Hand Side and Cab Interior ................................................................. 62
8.7 Front Panel ................................................................................................. 63
8.8 Part Kits ...................................................................................................... 63
8.9 Pump Parts................................................................................................. 64
8.10 Decals and Miscellaneous Parts ................................................................ 66
8.11 Stainless Steel Panels................................................................................ 66
8.12 Refrigeration Diagram and Wiring Diagram................................................ 67

1
SECTION 1
INTRODUCTION
1.1 DESCRIPTION
The Stoelting F431 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 mixes available, including ice milk, ice cream,
yogurt, and frozen dietary desserts.
This manual is designed to assist qualified service per-
sonnel in the installation, operation, maintenance, and
service of the Stoelting Model F431 pressure machine.
Figure 1-2 Specification
Figure 1-1 Model F431 Machine

2
1.2 SPECIFICATIONS
* CutOut amps must be set on site.
Model F431
Dimensions Machine with crate
width 19-1/8’’ (48,6 cm) 27’’ (68,6 cm)
height 67-7/8’’ (172,4 cm) 78’’ (198,1 cm)
depth 37-3/4’’ (95,9 cm) 48’’ (121,9 cm)
Weight 500 lbs (226,7 kg) 650 lbs (294,8 kg)
Electrical 1 Phase, 208-240 VAC, 60Hz
circuit ampacity 24A minimum
overcurrent protection
device 30A maximum
International Option 1 Phase, 220-240 VAC, 50Hz
Compressor 11,000 Btu/hr Scroll™ Compressor
Drive Motor Two - 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 fittings.
Hopper Volume Two - 5.5 gallons (20,82 liters)
Freezing Cylinder
Volume Two - 0.85 gallon (3,22 liters)
Menu Display Value
Basic CutOut * amps
Cut In T 19 °F
Cycles 20 count
Stir On 15 seconds
Stir Off 300 seconds
Advanced On Time 28 seconds
Off Time 450 seconds
Stb Time 120 minutes
Sl1DrvOn 120 seconds
Sl1DrOff 180 seconds
Sl2CutIn 32 °F
Sl2CtOut 28 °F
DftOffTm 600 seconds
Storage Refriger ** 3 Cabinet
(Left CabCutIn 38 °F
control CabCtOut 34 °F
only) Cab Off 13 minutes
Cab On 130 seconds
F431
Refrigerant R-404A
Charge (W/C) 26 oz
(A/C) 35 oz
Suction Pressure
(at 72°F)
One Cylinder 20-22 psig
Both Cylinders 25-27 psig
Cab Only 18 psig
Discharge Pressure 240-260 psig
Cab Pressure
(only cab running) 18 psig (maintained by the bypass valve)
EPR Valve 78-80 psig