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Model U421/U444
(Serial #17978 and up)
OWNER'S MANUAL
Manual No. 513595-4 July, 2004 Rev. 1
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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 U421/U444 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 N
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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 U421/U444 Series Freezer .........................................1 Figure 2a Air-Cooled Specifications ......................................................2 Figure 2b Water-Cooled Specifications .................................................2 Figure 3 Decal Locations .....................................................................3 Figure 4 Water/Electrical Connections .................................................4 Figure 5 Auger Rotation .............
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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 personal injury. The message that follows the symbol contains This Owner's Manual provides the operator with important information about safety. information for the safe operation and maintenance of Stoelting equipment. As with any machine, ther
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SECTION 1 INTRODUCTION 1.1 DESCRIPTION The Stoelting U421 and U444 floor model freezers are pres- sure fed. The freezers are equipped with fully automatic controls to provide a uniform product. The U421 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. The U444 freezer is designed to dispense soft serve product from the right side and shake product from the left side. This
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Figure 2a. Air-Cooled Specification Figure 2b. Water Cooled Specification 2
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SECTION 2 INSTALLATION INSTRUCTIONS 2.1 SAFETY PRECAUTIONS Do not attempt to operate the freezer until the safety If danger, warning or caution labels are needed, indicate precautions and operating instructions in this manual are the part number, type of label, location of label, and read completely and are thoroughly understood. quantity required along with your address and mail to: Take notice of all warning labels on the freezer. The labels STOELTING, LLC have been put there to help maintain
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2.2 SHIPMENT AND TRANSIT D. The freezer must have a minimum of 3" (7,5cm) The freezer has been assembled, operated, and in- -6" (15cm) high ambient conditions- of space on all spected at the factory. Upon arrival at the final destina- sides and 10" (25cm) at the top for proper circula- tion, the freezer must be checked for any damage which tion. may have occurred during final transit. CAUTION With the method of packaging used, the equipment should arrive in excellent condition. THE CARRIER IS RE
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A. Refer to the nameplate at the rear of the freezer for Auger shaft rotation is clockwise as viewed through the specific electrical requirements. Make sure the clear plastic front door. If the rotation is not clockwise, power source in the building matches the freezer turn main electrical power OFF. Then reverse L1 and L3 nameplate requirements. Bring the wires into the electrical power lines to the junction box (three phase junction boxes through the access holes in the only). Re-check auger s
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B. Connect 1/2 inch (12,7mm) I.D. plastic food grade 5. Turn pump off. tubing to check valve and then to the mix con- tainer. Observe check valve flow arrow. Secure 6.Connect mix pump hose to pickup hose with hose clamps. Then place assembly thru hole adapter using small hose clamp. in cover and install retainer clip. Figure 9. CAUTION C. Connect 1/2 inch (12,7mm) I.D. plastic food grade tubing between the large port of air/mix tee and DO NOT TWIS
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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 3.1 SAFETY PRECAUTIONS 3.2 OPERATING CONTROLS AND INDICATORS SAFE OPERATION IS NO ACCIDENT; observe these Before operating the freezer, it is required that the op- rules: erator know the function of each operating control. Refer to Fig.11 for the location of the operating controls on the A. Know the freezer. Read and understand the operat- freezer. ing instructions. WARNING B. Notice all warning labels on the freezer. Hazardous voltage The CLEAN-OFF-ON swi
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When the switch is placed in the OFF position, the refrigeration system and auger will not operate. When the switch is placed in the SERVE position, the refrigeration system and auger will operate auto- matically. The switch should be placed in the SERVE position for normal operation. C. Cabinet-Off-On Switch The CABINET-OFF-ON switch is a two position toggle switch. When the switch is placed in the OFF position, the lower cabinet refrigeration system will not run. When the switch is placed in t
