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Model U431 (Serial #17978 and up)
OWNER'S MANUAL
Manual No. 513568-4 May 2004, Rev. 0
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Need Parts or Service? We stock the parts you need. Our Technicians are factory trained and are certified in the Stoelting Technicare program. CALL Distributor: _________________________ Phone No.: _________________________ (fill in or affix label) Model No.: _______________________ Serial No.: _______________________ Purchase Date: ____________________ Start-Up Date:____________________
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STOELTING® OWNER'S MANUAL FOR MODEL U431 CAB MODEL SOFT-SERVE PRESSURIZED FREEZER This manual provides basic information about the freezer. 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 the freezer and its components, without incurring any obligation to modify or provide new parts for freezers built prior to date of change. DO NOT AT
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TABLE OF CONTENTS Section 1 .............................................................................................................. 1 1.1 Description .............................................................................................. 1 1.2 Specifications.......................................................................................... 2 Section 2 .............................................................................................................. 3 2.1 Safety P
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ILLUSTRATIONS Figure 1 Model U431 Freezer .............................................................. 1 Figure 2 Specifications ........................................................................1 Figure 3 Decal Locations .....................................................................3 Figure 4 Water/Electrical Connections .................................................4 Figure 5 Auger Rotation .......................................................................4 Figure 6 Mix
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SECTION 1 INTRODUCTION 1.1 DESCRIPTION The Stoelting U431 floor model freezer is pressure fed. The freezer is equipped with fully automatic controls to provide a uniform product. The freezer 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 personnel and operators in the installation, operation and maintenance of the Stoelting Model U431
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1.2 SPECIFICATIONS MODEL U431 DIMENSIONS Width: 26-3/4" (68cm) Depth: 39-3/4" (101cm) Height: 65-3/4" (167cm) WEIGHT 925lbs. (419,5 kg) 975lbs. w/Crate (442 kg) 1 PH 3 PH 1 PH 3 PH ELECTRICAL Left Side Right Side Left Side Right Side Left Side Right Side Left Side Right Side (2 separate power Total Running Amps 17.6 17.2 11.6 11.2 20.8 17.2 14.8 11.2 sources required.) Minimum Circuit Ampacity 31 31 21 21 36 31 26 21 HACR Max.Circuit Breaker 45 45 30 30 50 45 35 30 Maximum Fuse Size 45 45 30 30
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SECTION 2 INSTALLATION INSTRUCTIONS 2.1 SAFETY PRECAUTIONS periodically to be sure they have not been painted over, rubbed off, fallen off, and can be recognized as warning WARNING CAUTION labels. Do not attempt to operate the freezer until the safety pre- If you are in need of replacement labels, indicate the part cautions and operating instructions in the manual are read number, type of label, location of label, and quantity re- completely and are thoroughly understood.
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2.2 SHIPMENT AND TRANSIT The freezer has been assembled, operated, and in- spected at the factory. Upon arrival at the final destina- tion, the freezer must be checked for any damage which may have occurred during final transit. With the method of packaging used, the equipment should arrive in excellent condition. THE CARRIER IS RESPONSIBLE FOR ALL DAMAGE IN TRANSIT, WHETHER VISIBLE OR CONCEALED. Do not pay the freight bill until the freezer has been checked for dam- age. Have the carrier note a
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2.5 MIX PUMP A. 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. 6" (15cm) Figure 6. Mix Hose Installation 4. Allow the hose to feed itself thru the pump 7. Turn pump on. until 6" (15cm) remains on the entering side. 8. Allow remaining 6" (15cm) of tubing to feed thru pump 5. Turn pump
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B. Connect 1/2 inch (12,7mm) I.D. plastic food grade tubing to mix check valve (Item 7) and then to the mix container. Observe check valve flow arrow. Secure with hose clamps. Then place assembly thru hole in cover and install retainer clip. See Figure 9. C. Connect 1/2 inch (12,7mm) I.D. plastic food grade tubing between the large port of air/mix tee and refrigerated mix transfer line. Secure with large hose clamp or equivalent. See Figure 9. CAUTION AIR/MIX TEE MUST REMAIN BELOW THE BLACK COVE
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Refrigerated Mix Transfer Line 3-way Tee Large Port (Air/Mix) Figure 8. 3-way Tee Low Mix Cord Cover Retainer Mix Container Clip Figure 9. Mix Inlet Tube & Probe Assy. Clip Hose Holder Figure 10. Hose Holder 7
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SECTION 3 INITIAL SET-UP AND OPERATION A. Spigot Switch 3.1 SAFETY PRECAUTIONS When the spigot handle is opened the SPIGOT SAFE OPERATION IS NO ACCIDENT; observe these switch will start the auger drive and refrigeration rules: systems. When the spigot handle is closed, the drive A. Know the freezer. Read and understand the operat- ing instructions. B. Notice all warning labels on the freezer. B. Clean-Off-Serve Switch C. Wear proper clothing. Avoid loose fitting garments, The CLEAN-OFF-SERVE swi
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H. Dispense Rate Adjusters The dispense rate adjuster limits the opening of the spigot. To adjust product dispense rate, turn the adjusting knob clockwise for slower flow and counter- clockwise for faster flow. I. High Head Pressure Cut Out If the head pressure exceeds 445 PSIG (28 bar) air cooled and water cooled, the high head pressure cutout will trip. The reset button can be accessed from the side of the freezer. J. Low Mix Light The low mix light will illuminate when the liquid level in the
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3.3 IMPORTANT INFORMATION REGARDING CLEANING CLEANING AND SANITIZING · Is the removal of soil materials from a surface. Soft serve and shake freezers require special · Is a prerequisite for effective sanitizing. consideration when it comes to food safety and proper cleaning and sanitizing. NOTE An UNCLEAN surface will harbor bacteria that can The following information specifically covers issues defy sanitizing efforts. for cleaning and sanitizing frozen dessert freezers. This information is me
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The ideal concentration of chlorine needs to be 100 As a recommended cleaner and sanitizer for your ppm (as stated by the FDA). frozen dessert machine, STERA-SHEEN has proven to be one of the best daily maintenance products for: NOTE Follow the directions on the container for proper · CLEANING – Thorough removal of all solids concentration. including butterfat and milk fat. There are two main factors that contribute to falling · MILKSTONE REMOVAL – Complete removal of chlorine concentrations in
