Subscribe to Our Youtube Channel
Related Manuals for Stoelting U421/U444
Summary of Contents for Stoelting U421/U444
- Page 1 Model U421/U444 (Serial #17978 and up) OWNER'S MANUAL Manual No. 513595-4 July, 2004 Rev. 1...
- Page 3 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.: _________________________ Model No.: _______________________ Serial No.: _______________________ Purchase Date: ____________________ Start-Up Date:____________________...
- Page 5 STOELTING OWNER'S MANUAL ® 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.
-
Page 7: Table Of Contents
TABLE OF CONTENTS Section 1 ... 1 Description ... 1 Specifications ... 2 Section 2 ... 3 Safety Precautions ... 3 Shipment & Transit ... 4 Freezer Installation ... 4 Installing Permanent Wiring ... 4 Mix Pump ... 5 Section 3 ... 9 Safety Precautions ... - Page 8 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 ... 5 Figure 6 Mix Hose Installation...
-
Page 9: Safety Information
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. -
Page 11: Section 1
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. -
Page 12: Figure 2A Air-Cooled Specifications
Figure 2a. Air-Cooled Specification Figure 2b. Water Cooled Specification... -
Page 13: Section 2
STOELTING, LLC 502 Hwy. 67 Kiel, Wisconsin 53042 Decal 2 x 1-1/4 Blk on White Tag, Caution - Supply Voltage Decal GM Header (Stoelting Logo) Decal GM Header (Stoelting Swirl) Decal DQ Header (DQ Logo) Decal Caution Hazard.Moving Decal Standby/Serve... -
Page 14: Shipment & Transit
The customer must place claim for damage and/or shortages in ship- ment with the carrier. Stoelting, LLC. cannot make any claims against the carrier. 2.3 FREEZER INSTALLATION... -
Page 15: Mix Pump
A. Refer to the nameplate at the rear of the freezer for specific electrical requirements. Make sure the power source in the building matches the freezer nameplate requirements. Bring the wires into the junction boxes through the access holes in the bottom rear of the freezer. -
Page 16: Figure 7 Mix Pump
5.Turn pump off. 6.Connect mix pump hose to pickup hose adapter using small hose clamp. CAUTION DO NOT TWIST MIX PUMP HOSE. 7.Turn pump off. 8.Allow remaining 6" (15cm) of tubing to feed hru pump until hose adapter prevents further feeding. 9.Turn pump off. -
Page 17: Figure 8 3-Way Tee
Refrigerated Mix Transfer Line 3-way Tee Large Port (Air/Mix) Figure 8. 3-way Tee Low Mix Cord Cover Retainer Container Clip Figure 9. Mix Inlet Tube & Probe Assy. Clip Hose Holder Figure 10. Hose Holder... -
Page 19: Section 3
3.1 SAFETY PRECAUTIONS SAFE OPERATION IS NO ACCIDENT; observe these rules: Know the freezer. Read and understand the operat- ing instructions. Notice all warning labels on the freezer. Wear proper clothing. Avoid loose fitting garments, and remove watches, rings or jewelry which could cause a serious accident. - Page 20 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.
-
Page 21: Important Information Regarding Cleaning And Sanitizing
3.3 IMPORTANT INFORMATION REGARDING CLEANING AND SANITIZING Soft serve and shake freezers require special consideration when it comes to food safety and proper cleaning and sanitizing. The following information specifically covers issues for cleaning and sanitizing frozen dessert freezers. This information is meant to supplement a comprehensive food safety program. -
Page 22: Disassembly Of Freezer Parts
As a recommended cleaner and sanitizer for your frozen dessert machine, STERA-SHEEN has proven to be one of the best daily maintenance products for: · CLEANING – Thorough removal of all solids including butterfat and milk fat. · MILKSTONE REMOVAL – Complete removal of milkstone. -
Page 23: Cleaning Disassembled Parts
Disassembly Of Front Door 1. Remove the front door by turning off the black knobs and then pulling the front door off the studs. 2. Remove the air bleed valve by unscrewing the knob while holding the valve stem from behind. Remove the compression spring and push air bleed valve through the rear of the front door. -
Page 24: Cleaning The Freezer
3.7 CLEANING THE FREEZER CAUTION Risk of Product Damage Do not use acid cleaners, strong caustic compounds or abrasive materials to clean any part of the freezer exterior or plastic parts. The exterior should be kept clean at all times to preserve the lustre of the stainless steel. -
Page 25: Figure 18 Front Door Assembly
Assemble O-rings onto the spigot dry, without lubrication. Then apply a thin film of sanitary lubricant to the outside of the O-rings and spigot bodies. Install the spigot through the bottom of the front door ( see Figure 18). Figure 18. Front Door Assembly Assemble the air bleed valve O-ring onto the air bleed valves. -
Page 26: Sanitizing
3.9 SANITIZING Sanitizing must be done after the freezer is clean and just before the freezer is filled with mix. Sanitizing the night before is not effective. However, you should always clean the freezer and parts after using it. WARNING The United States Department of Agriculture and the Food and Drug Administration require that all cleaning and sanitizing solutions used with... -
Page 27: Mix Information
Mix Low Sensor Figure 21. Refrigerated Cabinet Place the mix pump switch in the ON position. The mix pump switch is located in the upper left hand corner, inside the refrigerated cabinet. Immediately open the spigot and let approximately 8 ounces of liquid mix with sanitizing solution drain out of the spigot. -
Page 28: Operation Of Mix Pump
3.12 OPERATION OF MIX PUMP The pump switch is located on the front of the freezer. When the pump switch is placed in the ON position, the mix pump motor will be actuated to pump mix into the freezer cylinder. When the set pressure is reached, the mix pump will shut off automatically. -
Page 29: Figure 23 Removable Parts
NOTE If the mix lines or air line is difficult to remove, soften with a rag soaked in hot water. Hose connections may be sprayed with Haynes Sanitary Lubricant for ease of removal. Do not loosen or remove the mix pump cover wingnuts. -
Page 31: Section 4
4.1 FREEZER ADJUSTMENT This section is intended to provide maintenance person- nel with a general understanding of the freezer adjust- ments. It is recommended that any adjustments in this section be made by a qualified person. 4.2 PRODUCT TEMPERATURE ADJUSTMENT A potentiometer is used to control the product tempera- ture. -
Page 32: Mix Pump Hose Reposition
F. Tighten the allen screw, then place the wrench back in its clip. Replace the lower back panel and secure with the four screws. Turn the mix pump power switch to the ON position. 4.4. MIX PUMP HOSE REPOSITION (every one or two weeks.) NOTICE Mix pump hose must be repositioned every 1 - 2... -
Page 33: Condenser Cleaning (Air Cooled Freezers)
Remove either side and back panels. Press firmly on one belt. Figure 29. Figure 30. Belt Adjustment When the tension is properly adjusted, the outside of the depressed belt should be approximately in line with the inside of the other belt. If an adjustment is necessary, loosen the four motor plate retaining nuts, adjust belt tension then re tighten the four nuts. -
Page 34: Troubleshooting
For water-cooled freezers that are left in unheated buildings, or buildings subject to freezing, the water must be shut off and disconnected. Disconnect fittings at water valve inlet and water outlet lines at the freezer. The fittings are located at the rear of the freezer. - Page 35 k " , " t n i l n i l . t u . t f t i s l i s ) . y s t l p i l n i l FREEZER . f f a t l e l l .
-
Page 36: Mix Pump
. f f a t l i t c i t c . x i . y l . x i . x i e l l . r i . x i " " 2 MIX PUMP . y l o l l o l l "... - Page 37 . y l . y l s ' r . y t " t " t & t f i s t i & / r i / r i t t i f y l l y l t "...
-
Page 39: Section 5
HOW TO ORDER REPLACEMENT PARTS 5.1 HOW TO ORDER REPLACEMENT PARTS To assure the receipt of the proper replacement parts, supply your Authorized Stoelting Distributor with the following information: Model number of equipment. Serial number of model (stamped on nameplate) Part number, part name, and quantity needed. -
Page 40: Front Door Parts
FRONT DOOR PARTS Drawing Index No. Part No. 625133 624520 694200 482004 2110116 1107123 570998 2146293 2157892 2143024 624655 624645 3152581 624677 1177905 482035 Description O-ring, Front Door O-ring, Air Bleed Valve Spring, Air Bleed Valve Knob, Air Bleed, Black Stem, Air Bleed Valve Spigot Handle Retaining Pin... -
Page 41: Miscellaneous Parts
AUGER PARTS Drawing Part Index No. Number Qty. 2104552 149003 381804 694255 4151178 624678 1151859 667868 MISCELLANEOUS PARTS Description Haynes Spray 12 oz.(340 grams) -------------------- 508017 Petro-Gel Tube 4 oz. (113 grams) -------------------- 508135 Spline Lubricant 2 oz. (57 grams) -------------------- 508048 Brush 4"x 8"x16"... - Page 42 Figure 7. Mix Pump...
- Page 43 Use copper cond. only, inside both J-boxes 324566 Wired According to, on elec. schematic envelope 130000 Elec. Schematic Envelope 324065 Water Inlet - Back panel above inlet coupling 324803 Header panel decal (Stoelting Logo) 324804 Header panel decal (Stoelting Swirl) 324805 Header panel decal (DQ Logo)
- Page 45 Customer No.: ________________ Customer P.O. No.: ________________ Stoelting Order No.: ______________ Sold To: _____________________________________ ____________________________________________ ____________________________________________ ____________________________________________ Contact Name: _______________________________ Phone: ______________________________________ Fax #: ______________________________________ Freight: Collect __________ Prepaid __________ Prepay & Add __________ Account # ________________ Third Party Billing...
- Page 47 Customer No.: ________________ Customer P.O. No.: ________________ Stoelting Order No.: ______________ Sold To: _____________________________________ ____________________________________________ ____________________________________________ ____________________________________________ Contact Name: _______________________________ Phone: ______________________________________ Fax #: ______________________________________ Freight: Collect __________ Prepaid __________ Prepay & Add __________ Account # ________________ Third Party Billing...
- Page 49 Stoelting, LLC warrants to the first user (the “Buyer”) that the freezer cylinders, hoppers, compressors, drive motors, speed reducers, auger and auger flights of Stoelting soft serve / shake freezers will be free from defects in materials and workmanship under normal use and proper maintenance appearing within...
Need help?
Do you have a question about the U421/U444 and is the answer not in the manual?
Questions and answers