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Stoelting U421 Operator's Manual

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Download this manual See also: Owner's Manual, Operator's Manual
Model U421 & U431
(Ser. #6374 Plus)
Operator's Manual
513725 Rev.0

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Summary of Contents for Stoelting U421

  • Page 1 Model U421 & U431 (Ser. #6374 Plus) Operator’s Manual 513725 Rev.0...

  • Page 2: Section 1: Introduction

    DO NOT ATTEMPT 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 ser- vicing of the machine, contact Stoelting. Stoelting Foodservice Equipment Customer Service: 888.319.9549...
  • Page 3 B. Mix Pump Hose Cleaning C. Fine Consistency Adjustment D. Daily Procedures - Night E. Daily Procedures Morning TROUBLESHOOTING A. Troubleshooting Flow Charts PARTS A. Auger Shaft & Front Door Parts B. Cab Tubing 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...
  • Page 4 Cabinet IntelliTec2™ Touchpad The U421 has two types of spigot handles, gate and pull-down. The gate style is opened by moving the handle to the left. The pull-down style is opened by pulling downwards. This manual shows the pull-down handles which are self-closing. The gate style handles need to be closed when fi nished dispensing.
  • Page 5 50°-70°F. The machine requires 6” (15,2 cm) air space on all sides for the cabinet refrigeration system. Cabinet Volume Two - 8 gallon (30,28 liters) Freezing Cylinder Two - 1.33 gallon (5,03 liters) Volume 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...
  • Page 6 The U431 has two types of spigot handles, gate and pull-down. The gate style is opened by moving the handle to the left. The pull-down style is opened by pulling downwards. This manual shows the pull-down handles which are self-closing. The gate style handles need to be closed when fi nished dispensing. U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 7 50°-70°F. The machine requires 6" (15,2 cm) air space on all sides for the cabinet refrigeration system. Cabinet Volume Two - 8 gallon (30,28 liters) Freezing Cylinder Two - 1.33 gallon (5,03 liters) Volume 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...

  • Page 8: Section 2: Operation

    Refer to State and local health codes for frequency. Remove any remaining water from the bucket in the cabinet. Press the Clean buttons. Drain the water and press the Clean buttons to stop the augers. U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...

  • Page 9: Front Door Disassembly

    Remove the air bleed and a quality product. Check the wear line on the auger valve from the front fl ights on a regular basis and replace as needed. door. 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...
  • Page 10 Remove the o-rings from the Remove the rear seal assemblies. adapter from the rear seal. Unscrew springs from the auger B.11 fl ights. If the pump hoses require cleaning and inspection, follow the steps in Section 3. U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...

  • Page 11: Cleaning Disassembled Parts

    fi nish. A mild alkaline cleaner is recommended. before assembling in machine. Use a soft cloth or sponge to apply the cleaner. For best results, wipe with the grain of the steel. 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...

  • Page 12: Assembling Machine

    Install the rear seal o-rings onto the augers. Lubricate the outside of the o-rings with a generous amount of sanitary lubricant. Lubricate the hex end of the auger with Total Blend. U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 13 Install the remaining plastic fl ights, push the auger into the freezing cylinder and rotate slowly until the auger engages the drive shaft. 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...
  • Page 14 fi lm of sanitary lubricant to the o-ring. E.12 Fit the front door o - r i n g s i n t o t h e grooves on the rear of the front door. U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 15 fi nger tight. Tighten in crisscross pattern. not overtighten. Proper o-ring seal can be observed through the transparent front door. E.17 Install the mix pickup assemblies in the cab using the hose clamps. 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...
  • Page 16 Following the sanitizer manufacturer’s instructions for preparing Press the CLEAN buttons to the sanitizing solution. start the augers rotating. The IntelliTec2™ display shows a Pour the sanitizing 5-minute timer. solution into the mix containers. U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 17 . If they are not, press the On/Off Left or On/Off Right button to turn them off . When the product is ready, the display will read “SERVE” or “SERVE 2”. Open the spigot to dispense product. 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...

  • Page 18: Lubrication Points

    Section 2: Operation I. Lubrication Points O-Ring O-Ring & Hex End of Auger Inside & Outside of Bushing ONLY Inside Metal Adapter All O-Rings* * U431 spigot bodies shown, U421 have two spigots U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 19 Black Cover Clamp Mix Sensor Mix Sensor 3/8" Clear Tube 3/8" Clear Tube Check Valve Block Check Valve Block Check Valve Check Valve Tan Pump Hose Tan Pump Hose Mix Pickup Assembly Mix Pickup Assembly 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...

  • Page 20: Section 3: Maintenance

    Connect a new length of tan hose to the mix sensor using a clamp. Loosen the clamps on the tan hose at the mix sensor and check valve block. Disconnect the hose at both ends. U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 21 Then turn the pump off . Connect the hose to the check valve block. Press and hold the Pump buttons until the pump hose reset message appears on the screen. Continue normal cleaning and sanitizing procedures. 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...
  • Page 22 System Under Pressure System Under Pressure the black cover clamp then turn the mix pump off . Never disconnect hoses from the machine or the pump without fi rst opening the spigot to relieve pressure. U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 23 Remove the two o-rings from the water. base of the check valve block. Remove the hose assemblies from the cab. Loosen all clamps and disconnect all hoses from the low mix sensor and check valve block. 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...
  • Page 24 Connect the tan hose to the bottom of the check valve block. The bottom of the block has the smaller hose connector. B.13 Turn the pump on and feed the tan hose into the left side of the black cover clamp. U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 25 Section 2 F. Insert the other end of the clear hose onto the mix tube at the top of the cabinet. Do not tighten the clamp until the check valve block is installed. 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...

  • Page 26: Fine Consistency Adjustment

    Change the +/- symbol to “-” and adjust the value for lower consistency (thinner) product. Make adjustments in increments of 5 for best results. Allow 3-4 draws or 30 minutes for the changes to take eff ect. U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...

  • Page 27: Daily Procedures

    Wipe the exterior clean with a mild detergent water to product. remove spilled or dried mix and wipe dry. When the product is ready, the display will read “SERVE” or “SERVE 2”. Open the spigot to dispense product. 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...

  • Page 28: Section 4: Troubleshooting

    Move anything blocking the louvered panels and make sure there is enough air clearance around the machine. Contact your authorized Continue normal Is the problem Stoelting distributor for operation. fixed? further assistance U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 29 Section 4: Troubleshooting If an error code appears on the machine complete the steps on the following pages before calling your authorized Stoelting distributor. Oftentimes the issues can be resolved using new/fresh product in a clean and sanitized machine. Any Error Code on IntelliTec2™...
  • Page 30 Disassemble machine Does the error and reassemble Is the problem occur immediately following the steps in the fixed? after assembling? operators manual. Contact your authorized Stoelting distributor for Continue normal operation. further assistance U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 31 Disassemble machine Does the error and reassemble Is the problem occur immediately following the steps in the fixed? after assembling? operators manual. Continue normal operation. Contact your authorized Stoelting distributor for further assistance 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...
  • Page 32 • Hot Dog Steamer Move equipment that Is there an increases the ambient Is the problem exterior heat temperature away from fixed? source? the machine. Contact your authorized Stoelting distributor for Continue normal operation. further assistance U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 33 Turn the system on. fixed? turned off? Are the water or Repair or replace the Is the problem glycol lines kinked lines. fixed? or damaged? Contact your authorized Stoelting distributor for Continue normal operation. further assistance 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...

  • Page 34: Section 5: Replacement Parts

    Section 5: Replacement Parts U421-I2 Auger Shaft & Front Door Parts 667868 667868 381804 381804 624678 624678 2183106 2183106 624520 624520 694255 694255 2187696 2187696 149003 149003 694200 694200 1151859 1151859 4151178 4151178 2104552 2104552 482004 482004 625133 625133 482019...
  • Page 35 1151859 Adapter - Rear Seal (Code 1) 2104552 Support - Front Auger 2110116 Valve - Air Bleed 2177427 Front Door 2187811 Spigot Body - Center 2187812 Spigot Body - Outer 4151178 Auger Shaft 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...
  • Page 36 1172864 Check Valve - Mix In Line (Outer) 2177274 Clip - Retaining (Mix Probe To Cover) 2203792 Pick-Up Tube - Mix 3177229 Cover - Rear (Mix Container) 3177262 Cover - Front (Mix Container) U421-I2 & U431-I2 OPERATOR’S MANUAL 513725 REV.0...
  • Page 37 513725 REV.0 U421-I2 & U431-I2 OPERATOR’S MANUAL...
  • Page 38 Stoelting’s sole obligations, and Buyer’s sole remedies, for any breach of this warranty shall be, at Stoelting’s option, one of the following: repair or replacement of the affected component at Stoelting’s plant in Kiel, Wisconsin, or refund of the purchase price of the affected Equipment. Stoelting, through an Authorized Stoelting Provider, will deinstall/reinstall the affected component from/into the equipment (“Labor”) for the period listed below in the Warranty...
  • Page 39 Costs not covered by Stoelting’s travel pay policy; Stoelting covers only the first trip travel which is a flat rate by mileage one- way from the service company’s home location, or closest location to the job site. The flat rate is calculated as follows:...

This manual is also suitable for:

U431

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