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Summary of Contents for Vollrath STOELTING SF144
- Page 1 Model SF144 SERVICE MANUAL Manual No. 513657 Rev.0...
- Page 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 pro- vide new parts for machines built prior to date of change.
- Page 4 A Few Words About Safety Safety Information Safety Alert Symbol: Read and understand the entire manual before This symbol Indicates danger, warning or caution. operating or maintaining Stoelting equipment. Attention is required in order to avoid serious per- sonal injury. The message that follows the symbol This manual provides the operator with information contains important information about safety.
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Page 5: Table Of Contents
TABLE OF CONTENTS Section Description Page Description and Specifications Description ....................1 Specifications ..................... 1 Modes of Normal Operation ................ 4 Mix Level Indicators ..................6 Hopper Refrigeration ................... 6 Motor Profile Cutout Compensation ............6 Installation Instructions Safety Precautions ..................9 Shipment and Transit ................. - Page 6 Section Description Page Refrigeration System Refrigeration System .................. 25 Refrigerant Recovery and Evacuation ............25 Refrigerant Charging ................... 26 Compressor ....................27 Condenser ....................28 Valves ......................28 Thermostatic Expansion Valve (TXV) ..............28 Check Valve ......................29 High Pressure Cutout ..................29 Hot Gas Bypass ....................
- Page 7 This manual is designed to assist qualified service person- nel and operators in the installation, operation and mainte- nance of the Stoelting SF144 gravity machine. Figure 1-1 SF144 Machine 1.2 SPECIFICATIONS...
- Page 8 SPECIFICATIONS M odel F144 / SF144 Dimensions Machine with crate 22'' (55,9 cm) 28'' (71,1 cm) width 34-3/4'' (88,3 cm) 40-1/4'' (102,2 cm) height 28-1/2'' (72,4 cm) 35-1/4'' (89,5 cm) depth 385 lbs (174,6 kg) 470 lbs (213,1 kg) Weight Electrical 1 Phase, 208-230 VAC, 60Hz approximately 11A...
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Page 9: Modes Of Normal Operation
1.3 MODES OF NORMAL OPERATION Following are details of the operational modes of the IntelliTec control. NOTE: The preset amounts, times, and temperatures listed below are references to actual settings on the IntelliTec control. Refer to Table 1-1 on page 7 for details on each setting. -
Page 10: Hopper Refrigeration
the "Sleep 1 Mode". Refer to Figure 1-4 for a graphical representation of the "Standby Mode". If a spigot is opened or the PUSH TO FREEZE button is pressed, the control will move to “Serve Mode”. Product in the front of the freezing cylinders may or may not be at consistency. -
Page 11: Mix Level Indicators
If a sensor fails, the display will show the error and the audible alarm is a reminder for the operator to end the control will run the machine on timers for the freezing cycle "Clean Mode" when cleaning is completed. or hopper refrigeration. - Page 12 IntellITec Control Setting Specifications Basic Menu DISPLAY LEFT RIGHT MODE DEFINITION CutOut 50 sec 50 sec Serve Amp draw setting for cut out Cut In T 19°F 23ºF Serve Temperature setting for cut in Cycles Serve Freezing cycles before going into Standby Mode Stir On 15 sec 15 sec...
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Page 13: Installation Instructions
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. -
Page 15: Initial Set-Up And Operation
SECTION 3 INITIAL SET-UP AND OPERATION 3.1 OPERATOR’S SAFETY PRECAUTIONS 3.2 OPERATING CONTROLS AND INDICATORS SAFE OPERATION IS NO ACCIDENT; observe these rules: Before operating the machine, it is required that the operator know the function of each operating control. Refer Know the machine. - Page 16 A. MAIN FREEZER POWER SWITCH Push to Freeze The Main Freezer Power switch is a two position rocker Green LED switch that supplies power to the IntelliTec control, freez- ing cylinder circuits and hopper refrigeration system. When Amber LED the switch is placed in the ON position, the hopper refrig- eration system will run until the preset temperature is Clean Button reached;...
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Page 17: Important Information Regarding Cleaning And Sanitizing
3.3 IMPORTANT INFORMATION REGARDING CLEANING SANITIZING AND SANITIZING · Kills bacteria. Soft serve machines require special consideration when it · Can be effective on clean surfaces only. comes to food safety and proper cleaning and sanitizing. NOTE The following information specifically covers issues for Using a SANITIZER on an unclean surface will not cleaning and sanitizing frozen dessert machines. -
Page 18: Disassembly Of Machine Parts
MACHINE DAMAGE – Strong acids will attack Inspection for worn or broken parts should be made at every metal and rubber causing premature wear of disassembly of the machine. All worn or broken parts parts. The use of a delimer needs to be closely should be replaced to ensure safety to both the operator and monitored to avoid damage to machine surfaces the customer and to maintain good machine performance... -
Page 19: Cleaning Disassembled Parts
B. DISASSEMBLY OF AUGER Remove the front auger support and bushing. Remove the auger assembly from the machine. Pull the auger out of the machine barrel slowly. As the auger is being pulled out, carefully remove each of the plastic flights with springs. Keep the rear of the auger tipped up once it is clear of the freezing cylinder to prevent the rear seal assembly from dropping. -
Page 20: Assembling The Machine
3.8 ASSEMBLING MACHINE Apply a thin layer of sanitary lubricant to the inside and outside of the auger support bushing. Install To assemble the machine parts, refer to the following steps: the bushing onto the auger support and install the NOTICE auger support into the front of the auger. -
Page 21: Initial Freeze Down And Operation
Place the Main Power OFF/ON and Freezing Change the value to 8.0. Press the left arrow button Cylinder OFF/ON switches in the ON position. to move the cursor. Press the up arrow button to Press the CLEAN button. increase the digit. When a digit reaches 9, pressing the up arrow button again will change the value to Check for leaks. -
Page 22: Normal Freeze Down And Operation
Press the SEL button three times. The LCD will When the product is at 75% consistency, the read “EXITMENU”. display will read “SERVE”. Open the spigot to dispense product. Press the up arrow (Ý) button to exit the menu. The machine dispenses product at a reasonable Adjustment to the control is completed. -
Page 23: Maintenance And Adjustments
SECTION 4 MAINTENANCE AND ADJUSTMENTS MACHINE ADJUSTMENT LOCKING THE CONTROL PANEL This section is intended to provide maintenance person- The IntelliTec control has a tamper proof mode to prevent nel with a general understanding of the machine adjust- unauthorized use. When set, all buttons on the control ments. -
Page 25: Readings
To change the value of a system function, locate the Aux. Temp (°F) function on the IntelliTec Settings Menu and follow the This reading provides the ambient temperature steps below. around the IntelliTec control. IMPORTANT: Supply V (VAC) Before making changes to any settings, record the A calculated input voltage is recorded. -
Page 26: Adjustments
Up Time (hours) Cut In T (°F) This value is a record of the total time the machine After the consistency value has been determined, has been in service. If power is interrupted, the the Cut In T value can be adjusted. The Cut In T timer will stop until power is restored. -
Page 27: Drive Belt Tension Adjustment
Stb Time (sec) DRIVE BELT TENSION ADJUSTMENT This setting determines the total amount of time in To check belt tension, refer to Figure 4-4 and follow the "Standby Mode". steps below: Sl1DrvOn (sec) Adjustments to this setting affect the amount of WARNING time the auger rotates in the stir cycle. -
Page 28: Preventative Maintenance
on the right and left sides of the unit for free flow of air. Make 4.10 PREVENTATIVE MAINTENANCE sure the machine is not pulling over 100° F (37° C) air from It is recommended that a preventative maintenance sched- other equipment in the area. ule be followed to keep the machine clean and operating The water-cooled condenser is a tube and shell type. -
Page 29: Refrigeration System
SECTION 5 REFRIGERATION SYSTEM 5.1 REFRIGERATION SYSTEM NOTE For qualified service personnel only. Anybody work- The F144 and SF144 refrigeration systems have two ing with refrigerants must be certified as a Techni- functions: cian TYPE I as required by 40 CFR 82 Subpart F Medium-Temperature - Maintaining product and hold all State and/or local refrigerant handling temperature in the hopper. -
Page 30: Refrigerant Charging
A. REFRIGERANT RECOVERY B. EVACUATING THE REFRIGERATION SYSTEM Disconnect the machine from electrical supply Close any open ports in the refrigeration system. before removing any panels for servicing. Connect a vacuum gauge to one of the Schrader Remove all panels. valves next to an evaporator. -
Page 31: Compressor
Remove the front panel. WARNING Remove the protective cover from the compressor terminals. Disconnect the three terminals; C Hazardous voltage (common), R (run), and S (start). The Main Freezer Power switch must be placed in Connect an ohmmeter to the C and R terminals on the OFF position when disassembling for servic- the compressor. -
Page 32: Condenser
C. COMPRESSOR INSTALLATION 5.6 VALVES Make sure the machine is disconnected from the A. THERMOSTATIC EXPANSION VALVE (TXV) electrical supply before removing any panels for The Thermostatic Expansion Valve (TXV) is used to meter servicing. the refrigerant to the freezing cylinder evaporator. It does Install the four rubber mounts on the compressor. -
Page 33: Check Valve
NOTE Tighten clamp to 20 in/lb using a torque wrench. The TXV is the LAST component to adjust in the Replace insulation to the TXV and surrounding refrigeration system. lines. The TXV can be adjusted after the steps above Replace the drier per the instructions in Section are completed. -
Page 34: Hot Gas Bypass
HIGH PRESSURE CUTOUT REPLACEMENT NOTE With the suction and discharge ports open, braze If the machine does not have a Main Power switch, the capillary tube to the discharge line. turn the right side Freezing Cylinder switch OFF and listen to make sure the left freezing cylinder is not Replace the drier per the instructions in Section calling for refrigeration. -
Page 35: Evaporator Pressure Regulator (Epr)
HOT GAS BYPASS REPLACEMENT EPR REMOVAL To replace the hot gas bypass, perform the following Remove the left side panel and front panel. procedures: Recover refrigerant charge per instructions in Apply a heat sink (wet cloth) to the hot gas bypass. Section 5.2. -
Page 36: Solenoid
are too high, the opening point pressure should be evaporator when the suction pressure drops due to the decreased to increase the flow of water. Turn the operation of the other evaporators in the system. adjustment screw clockwise. WATER VALVE REMOVAL The water valve is connected to the refrigeration system by capillary tube brazed to the discharge line. - Page 37 SUCTION LINE SOLENOID TESTING Watch the pressure in both freezing cylinders. The freezing cylinder with the greatest pressure rise To check for leaking valve seats, follow the procedure may have a leaking valve seat. outlined below. The liquid line solenoid must remain open for this test.
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Page 38: Filter Drier
5.8 FILTER DRIER The filter drier must be replaced every time the refrigeration system is opened for service. A new filter drier improves operation of the entire refrigeration system by stopping the circulation of moisture and by removing harmful contami- nants (Refer to Figure 5-13). -
Page 39: Electrical And Mechanical Control Systems
SECTION 6 ELECTRICAL AND MECHANICAL CONTROL SYSTEMS NOTE The wiring diagram is available in Section 8.. INTELLITEC CONTROLLER The IntelliTec control is Stoelting’s most advanced control- ler. It combines all of the best features of previous control- lers with advanced sensing and troubleshooting capabili- ties. -
Page 40: Drive Motor
A. CONTACTOR TESTS The following tests will show if a contactor is working properly. Open right side panel and visually check the IntelliTec control board. Check for a signal going to contactor. When the spigot is opened or the Push To Freeze button is pressed, the DRV LED on the control board will light up. -
Page 41: Capacitors
CAPACITORS The compressor start and run contactors are mounted behind the right side panel. They are accessed by removing Rating the panel behind the condenser filter. SF144 Part Drive Motor Start 231095 500 MFD 125 VAC The start and run capacitors for the drive motors are Drive Motor Run 231096 50 MFD... -
Page 42: Gearbox
C. GEARBOX INSTALLATION SPIGOT SWITCH Place the gearbox in position from the rear of the The spigot switch is a normally closed, held open switch. machine. Fasten the bolts through the gearbox to When a spigot is pulled, the spigot switch sends a signal the rear of the barrel. -
Page 43: Spigot Switch
Remove the two Phillips head screws that attach WARNING the spigot cam assembly to the panel. Remove the assembly. Hazardous voltage Disconnect the connector from the switch and The Main Freezer Power switch must be placed in remove the switch. the OFF position when disassembling for servic- Install the replacement switch onto the handle ing. -
Page 45: Troubleshooting
SECTION 7 TROUBLESHOOTING 7.1 ERROR CODES from a restriction preventing mix from entering the freezing cylinder. Check the mix in the hopper. If When the machine experiences a problem, one of the the level mix is low, add mix. If there is a possibility following error codes will be displayed on the control panel. - Page 46 Error Code 5 - Freezing Cylinder Sensor Error Code 8 - Cab Sensor The Freezing Cylinder Sensor Error (E5) indicates A Cab Sensor Error (E8) will not occur on the a failure of the barrel sensor or an extreme out of machine.
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Page 47: Servicing Tip
the resistance of the sensor, place a thermocouple The display panel lights will also flash in an alternating on the suction line at the exit of the freezing sequence under any error codes. Clear the error cylinder. Compare temperature and sensor and place the Freezing Cylinder Off-On switch in resistance with the table as reference. -
Page 48: Troubleshooting - Machine
7.4 TROUBLESHOOTING - MACHINE PROBLEM POSSIBLE CAUSE REMEDY 1. Power to machine is off. 1. Supply power to machine. 2. Blown fuse or tripped circuit. 2. Replace or reset. 3. Freeze-up (auger will not turn). 3. Turn freezing cylinder switch to the OFF Machine does not position for 15 minutes, then restart. -
Page 49: Replacement Parts
SECTION 8 REPLACEMENT PARTS 8.1 DECALS AND LUBRICATION Part Description Quantity 208135 Brush - 4" X 8" X 16" (Barrel) 208380 Brush - 1/4" X 3" X 14" 208401 Brush - 1" X 3" X 10" 208467 Brush - 3/8" X 1" X 5" 236025 Card - Cleaning Instruction 324065... -
Page 50: Auger Shaft And Faceplate Parts
8.2 AUGER SHAFT AND FACEPLATE PARTS... - Page 51 8.2 AUGER SHAFT AND FACEPLATE PARTS (CONTINUED) Part Description Quantity 149003 Bushing - Front Auger Support 232734 Cap - Rosette - Teardrop 266076 Clip - Drip Tray 314453 Cover - Hopper 381804 Auger Flight 482019 Knob - Front Door (Black) 624598-5 O-Ring - Spigot - Black (5 Pack) 624677-5...
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Page 52: Machine Front
8.3 FRONT 428045 428065 2158260 718532 718532 482004 1158090-SV 719025-SV Part Description Quantity 215061 Plug - Bumber (Drip Tray) 428045 Knob - Spigot Handle (Black) 428065 Knob - Spigot Handle (Red) 482004 Knob (Spigot Adjustment) 2158260 Handle - Spigot (Metal Only) 718532 Switch - Toggle (Freezing Cylinder &... -
Page 53: Blender
8.5 BLENDER 208481/ 208482 202198 522839 688026 324837 674147 719055 647886 681514 274031 744299 521026 647660 Part Description Quantity 521026 Blender Agitator 274031 Blender Agitator Collar 522839 Blender Motor 208481 Blender Motor Brushes (Set of 2) (Ser #180920 - 181120) 208482 Blender Motor Brushes (Set of 2) (Ser #483639 Plus) 688026... -
Page 54: Left Side
8.6 LEFT SIDE 2171962 614233 4183213 272065 Coil 763423 Valve 763482 Coil 763017 763422 Valve Part Description Quantity 614233 Speed Reducer 272065 Valve Coil - Solenoid (#763723 Valve) 458003 Indicator - Liquid Line 763017 Valve - Hot Gas Bypass 763422 Valve - Solenoid (Liquid Line) 763423 Valve - Solenoid (Suction Side) - Page 55 8.7 RIGHT SIDE 229116 765214 295017 744142 521686-230 295005 618157 231084 231079 8.7 FRONT 762978 762454 342004 282032 342020 231107...
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Page 56: Right Side
8.7 RIGHT SIDE (CONTINUED) Part Description Quantity 229116 Cable - Phone (Control Board To Display Board) 230633 Capacitor - Run (#282045 & #282050 Compressors) 230649 Capacitor - Start (#282050 Compressor) 231079 Capacitor - Start (#282032 Compressor) 231084 Capacitor - Run (#282032 Compressor) 295005... -
Page 57: Rear
8.9 REAR 614233 598245 598245 284084 762275 522291 152324 152340 162077 598137 598072 522858-SV 430119... -
Page 58: Spigot
8.9 REAR (CONTINUED) Part Description Quantity 152324 Belt - Grip-Notch - Soft Serve (AX-40) (Each) 152340 Belt - Grip-Notch - Shake (AX-41) (Each) 162077 Blade - Fan (Air-Cooled Condenser) 231096 Capacitor - Run (Motor) 231095 Capacitor - Start (Motor) 284084 Condenser (Air-Cooled) 1 (F131) 284104... -
Page 59: Refrigeration Diagram & Wiring Diagram
8.11 REFRIGERATION DIAGRAM & WIRING DIAGRAM...
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