U421/U444 - Vollrath
Contents
1. NOTICE Three phase freezers in areas of unbalanced electrical loads require special attention when connecting input electrical power The unbal anced leg of power called wild or high must be connected to L2 in the junction box NOTICE Verify actual voltage Machine is equipped with a transformer to supply a control circuit You will need to check voltage on terminal C1 and Fi A Rotati C2 on EACH control board Located behind gure Se AUGEN Rotation decorative header panel on front of machine 2 5 MIX PUMP Transformers are located behind electrical panel enclosing control boards Access these by re A Mix Pump Hose Installation l moving top panel of machine Actual transformer Follow the steps below to install the mix pump hose voltage should read 20 28 V A C 1 Turn pumpon B Remove the lower back panel and the two junc tion box covers located at the bottom of the 2 Feed one end of mix pump hose into the entering or freezer pick up hose side left of black cover C Install permanent wiring according to local 3 Gently push the hose into the black cover until it code begins to feed D Check the auger shaft rotation by placing the 4 Allow the hose to feed itself thru the pump until 6 MAIN DRIVE switch in the CLEAN position 15cm remains on the entering side Figure 6 Mix Hose Installation 5 5 Turn pump off 6 Connect mix pump hose to pickup hose adapter using small ho2. 3 Remove the spigot through the bottom of the front door see Figure 13 Remove all O rings from spigot and air bleed valve Figure 15 Rear Seal Removal 3 5 CLEANING DISASSEMBLED PARTS Disassembled freezer parts require complete cleaning sanitizing and air drying before assembling Local and state health codes will dictate the procedure required Some state health codes require a four sink process pre wash wash rinse sanitize air dry while others require a three sink process without the pre wash step The following procedures are ageneral guideline only Consult your local and state health codes for procedures required in your location A To clean the freezer parts disassemble all parts Refer to section 3 4 for the disassembly of freezer Figure 13 Front Door Disassembly paris B Disassembly Of Auger D Place all front door and auger parts in clean 90 to 1 Remove the front auger support by pulling it 110 32 C to 43 C water and wash thoroughly straight out of the freezer barrel four sink procedure only 2 Remove the plastic bearing from the front auger Place all parts in 90 to 110 F 32 C to 43 C mild SU detergent water and wash thoroughly pport 3 Remove the auger by pulling slowly and rotating D Rinse all parts with clean 90 to 110 F 32 C to out of the freezer barrel As the auger is 43 C water withdrawn remove each plastic flight and spring from the auger Be careful not t
3. Large air pocket in barrel Auger turning counter clockwise Adjust temperature See Section 4 2 Raise overrun See Section 4 3 Check pump pressure Purge air from barrel Change rotation to clockwise Rear auger seal leaks Rear auger seal not lubricated Seal missing or installed wrong Worn or scratched shaft Lubricate seal See Section 3 8 Check See Section 3 8 Replace shaft Spigot leaks Spigot parts are not lubricated Chipped or worn o rings O rings on spigot installed wrong Nicks or scratched on front door where spigot is located Lubricate See Section 3 8 Replace O rings Remove spigot and check O rings Replace front door Drive belt tension not correct Drive belts slipping or squealing Worn belt s Temperature setting is too low Low overrun Adjust belt tension See Section 4 7 Replace belts Adjust temperature See Section 4 2 Check for air leak Mix temperature too warm in cab System low on refrigerant Add refrigerant Refrig Service Temperature control set too Remove left side panel and locate warm temperature control and follow instructions on decal Mix temperature too Temperature control set too cold Remove left side panel and locate cold in cab temperature control and follow instructions on decal MIX PUMP 1 PUMP MOTOR DOES NOT RUN Power to pump is off Supply power to pump
4. Do not loosen or remove the mix pump cover wingnuts Maintain the mix pump hose in its operational condition 1 Loosen clamp and remove air hose from pump compressor 2 Loosen clamp and disconnect mix pump hose Remove the pickup hose mix check valve and pickup hose adapter and bag adapter if applicable as an assembly from mix container 3 Completely disassemble both hose assemblies and check valve Place hoses tee check valve assem bly and pickup hose adapter in 90 to 110 F 32 C to 43 C mild detergent water and wash thoroughly Use soft bristle brushes to clean inside of fittings Rinse all parts in clean 90 to 110 F 32 C to 43 C water see Figure 23 4 Carefully inspect each part for wear or damage Replace worn or damaged parts 5 Wash feed tube and air tube with 90 to 110 F deter gent water and brushes provided Rinse with clean 90 to 110 F water See Figure 24 and 25 6 Prepare two gallons 7 5 liters of sanitizing solution using a USDA certified grade sanitizing solution Sanitize all removed parts then air dry 7 Check Hose Service Record decal to determine if hose reposition or replacement is required at this time 8 Reassemble both hose assemblies per the diagram located on the inside of the cab door Reconnect assemblies to the pump and discharge hose using the clamps See Figure 26 or refer to Section 2 5 Mix Pump y f TAR Ow A Figure 23 Remova
5. Low voltage Check for low line voltage Mix pump hose jammed inside black cover clamp Disconnect pump from power source Remove four cover clamp thumb screws Separate cover clamp halves and remove outer half Remove jammed hose Re install cover clamp and tighten four thumb screws securely Allow motor thermal overload to reset See Sec 2 5 for hose replacement Do not use jammed portion of hose overload cause and repair NOTE 2 IMMEDIATELY AFTER A BAG CHANGE THE PUMP MAY BE UNABLE TO RE ESTABLISH IT S PRIME WITH THE SYSTEM AT OPERATING PRESSURE IN THIS CASE TURN THE PUMP OFF DRAW 2 3 PINTS TO REDUCE SYSTEM PRESSURE TO ZERO TURN PUMP ON PURGE REMAINING AIR IN MIX BAG AND PICK UP HOSE IMPORTANT Before connecting the pick up hose to the mix bag purge the mix bag of air to the extent possible Mix pump hose kinked inside black cover clamp Increase overrun setting Contact local Stoelting Distributor Mix pump hose service life is exceeded Reposition replace mix pump hose Out of Mix Replenish mix supply Overrun setting too high Decrease overrun setting Pick up leg of mix pump hose is collapsing See Section 2 5 NOTE ALSO SEE 2 ABOVE 5 REPLACEMENT MIX PUMP HOSE WON T FEED THROUGH PUMP Feeding hose into discharge hole of mix pump cover Feed hose into pick up side of cover Hose ends not cut squarely Carefully cut hose end off squarely no tails Gently and slowly assist feeding of hose up into pick
6. Y STOELTING FOODSERVICE EQUIPMENT Model U421 U444 Serial 17978 and up OWNER S MANUAL Manual No 513595 4 Feb 2009 Rev 4 Need Parts or Service Our Technicians are factory trained and are certified in the Stoelting Technicare program Y CALL A Distributor Phone No Model No Serial No Purchase Date Start Up Date STOELTINGe 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 NOT ATTEMPT to operate the freezer 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 servicing of the freezer contact the company at the location listed below STOELTING LLC Tele 920 894 2293 502 Hwy 67 Kiel WI 53042 1600 Fax 920 894 7029 TABLE OF CONTENTS SEC HOT EAE xxx xx ax kinike ea cee A KK u K r WU lI wl AN k k 1 1 1 DESCUIDO TEE 1 1 2 OPOCINMC ATOM Seine ee re 2 SELHON EN 3 2 1 SEENEN 3 2 2 Shipment amp Transit u sd dy su k0 dekle da
7. Although these terms may sound synonymous they are not BOTH are required for adequate food safety and proper machine maintenance CLEANING Is the removal of soil materials from a surface Is a prerequisite for effective sanitizing NOTE An UNCLEAN surface will harbor bacteria that can defy sanitizing efforts Bacteria can develop and resist sanitizing efforts within a layer of soil material milkstone Thorough cleaning procedures that involve milkstone removal are critical for operators of frozen dessert machines SANITIZING Kills bacteria Can be effective on clean surfaces only DOES NOT clean or remove milkstone NOTE Using a SANTITIZER on an unclean surface will not guarantee a clean and safe frozen dessert machine Proper Daily Maintenance The Only Way to Assure Food Safety and Product Quality Proper daily maintenance can involve a wide variety of products and procedures Overall the products and procedures fall into three separate categories Please note that this is a brief overview intended for informational purposes only 1 CLEANING This involves draining mix from the freezer barrel and rinsing the machine with water Next a cleaner is run through the machine Then the machine is disassembled and removable parts are taken to the sink for cleaning 2 MILKSTONE REMOVAL Since almost all cleaners do not have the ability to remove milkstone the use of a delimer becomes necessary Although this pro
8. Parts Lists and Reference Drawings 2 29 Figure 1 Figure 2a Figure 2b Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 ILLUSTRATIONS Model U421 U444 Series Freezer EN 1 Air Cooled Specifications AEN 2 Water Cooled Specifications oooonionnnncccnnnncnonasncccnnnnnnnnns 2 Decal Locations accede V tenes 3 Water Electrical Connections a nee 4 Auge TOTO IN E 5 Mix Hose lnstallaton keke 5 Mi B R D D 6 SWAN Ver ara E erento eee 7 Mix Inlet Tube Probe Assy Cp 7 Hose Halder anne 7 Operating EE ee 9 Auger Flight Wear amp Front Auger Support Bushing Wear 12 Front Door Disassembly kene 13 Auger Flight Hemoval kek k 13 Rear Seal Removal a 13 Rear Seal Lubrication asias ip 14 Spring Installation ee 14 Front Door Assembly nenne 15 Air Bleed Valves tias 16 Draining Sanitizer eins 16 Refrigerated Cabinet ee 17 Mix PUMPS N PI 18 ne E see ee N a ne else nk 19 Cleaning Air Le 19 Cleaning Feed Tube nen 19 Mix Pump Tube Routing sea ie 19 Potentiometer zes 21 EE E israel 21 Temperature Control Cab ke 22 Belt Adjustment AAA 23 A Few Words About Safety Safety Information Read a
9. monitored to avoid damage to machine surfaces and parts With proper daily use of STERA SHEEN or it s equivalent there is no need for the use of a DELIMER DO NOT USE BLEACH BLEACHHAS ABSOLUTELY NO CLEANING PROPERTIES BLEACH IS CORROSIVE It can and will damage components of the machine causing premature wear and metal corrosion GENERAL PURPOSE CLEANERS General purpose cleaners do not have the ability to remove milkstone Milkstone will become a problem if not remedied with additional products and procedures THE USE OF CHLORINE TEST STRIPS Test strips are used to determine concentrations of active chlorine in sanitizing solutions To use the strips tear off a small portion and submerge it into the sanitizing solution Then compare the color change to the color key on the side of the test strip dispenser to determine the approximate chlorine concentration The ideal concentration of chlorine needs to be 100 ppm as stated by the FDA NOTE Follow the directions on the container for proper concentration There are two main factors that contribute to falling chlorine concentrations in a sanitizing solution 1 PRODUCT USE As the chlorine in the solution is being used chlorine concentrations fall 2 TIME As time passes small amounts of chlorine evaporate from the solution Thatis why you can smell it Sanitizing solutions should not be allowed to fall below 100 ppm chlorine New soluti
10. the product in the barrel reaches the proper temperature Clean Off Serve Switch The CLEAN OFF SERVE switch is a three position toggle switch used to control the operation of the refrigeration system and auger When the switch is placed inthe CLEAN position the refrigeration sys tem willbe off and auger will rotate for cleaning vw Se Sai EE iv Figure 11 Operating Controls 9 When ihe switch is placed in the OFF position the refrigeration system and auger will not operate When ihe 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 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 the ON position the lower cabinet refrigeration system will run until the preset temperature is reached then cycle ON and OFF to maintain that temperature Cab Indicator Light A flashing light indicates the cab OFF ON switch is in the OFF position no refrigeration Place the OFF ON switch in the ON position for cab refrigeration Pump Switch The pump motor switch is a two position toggle switch When the switch is placed in the OFF position the pump will not run When the switch is placed inthe ON position the pump will run until the prese
11. 3 482004 Knob Air Bleed Black 14 2110116 Stem Air Bleed Valve 15 1107123 Spigot Handle 16 570998 Retaining Pin 17 2146293 Spigot Extension 2 1 2157892 Spigot Extension 1 5 2143024 Spigot Extension 3 2 18 624655 Spigot O ring 19 624645 Spigot Extension O ring 20 3152581 Spigot White 21 624677 Spigot O ring 22 1177905 Front Door 23 482035 Knob Black 30 AUGER PARTS Drawing Part Index No Number Qty Description 1 2104552 1 Auger Front Support 2 149003 1 Front Bearing 3 381804 6 Plastic Flight 4 694255 6 Spring 5 4151178 1 Auger 6 624678 1 Rear Seal O ring 7 1151859 1 Rear Seal Adaptor 8 667868 1 Rear Seal MISCELLANEOUS PARTS Description Part No Haynes Spray 12 0z 340 grams 508017 Petro Gel Tube 4 oz 113 grams 508135 Spline Lubricant 2 oz 57 grams 508048 Brush 4 x 8 x16 10cm x 20cm x 40 5cm 208135 Brush 2 5 x 4 x12 6 5cm x 10cm x 30 5cm 208146 Brush 25 x 4 x14 6cm x 10cm x 35 5cm 208380 Brush 1 x3 5 x18 2 5cm x 9cm x 45 5cm 208465 Drip Tray 744273 Drip Tray Grid 417006 264241 756067 376041 1151965 Figure 7 Mix Pump 32 DECALS Qiy D _ PD D _ DDD 22 A ANNNNAD0DNN NANDN0N Part Number 324200 324798 324797 324800 324799 324141 324509 324014 324686 723525 324106 324346
12. 324107 324208 723552 723517 324548 324103 324151 324125 324242 324565 324158 324566 130000 324065 324803 324804 324805 Description H P Manual Reset Clean Off Serve Standby Serve Cab Off On Pump Off On Caution Haz Rot Blade Front Panel Cleaning Right Side Auger Rotation Evap Enclosure Rear Danger Start Auto on Evap Support between belts amp motors support brkt Winterizing Attach to water hose near bottom Caution Elec Wiring Mat ls must conform between water couplings one rear panel bottom Caution Haz Mov Parts on inside of mtr support brkt rear Caution Haz Mov Parts on cond bkt rear amp 2 on evap enclosure sides Attn Ref Lk Chk on evap enclosure sides Tag Supply volt inside J Box Card Inside one J Box ID Tags Back Panel Top Add Vent Back Panel Ctr Top Made in U S A Back panel Caution Rot Shaft on gearbox support bracket Field Connections J Box cover outside Danger Elec Shock J Box covers outside back panel bottom Warm Cold T Stat Night Serve Temp Control Bracket Use copper cond only inside both J boxes Wired According to on elec schematic envelope Elec Schematic Envelope Water Inlet Back panel above inlet coupling Header panel decal Stoelting Logo Header panel decal Stoelting Swirl Header panel decal DQ Logo 33 34 Y STOELTING FOODSERVICE EQUIPMENT WARRANTY SOFT SERVE SHAKE FREEZERS 1 Scop
13. 4014 Decal Arrow 13 324107 Decal Caution Moving Parts 33 324496 Decal Freezing 14 324125 Decal Elect Shock Hazard Water Cooled Only 15 324151 Decal Field Connections A 324065 Decal Water Inlet 16 324198 Decal Attention Installer B 723525 Tag Winterizing Disconnect Line 17 130000 Bag Envelope Front Loading C 723517 Tag W C Tower Instructions 18 324584 Decal Adequate Ventilation D 324107 Decal Caution Moving Parts 19 324158 Decal Copper Conductors Only Air Cooled Only 20 324106 Decal Caution Wiring Mat E 324346 Decal Hazardous Moving Parts 22 324566 Decal Wired According To F 324107 Decal Caution Moving Parts 3 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 RESPON SIBLE FOR ALL DAMAGE IN TRANSIT WHETHER VIS IBLE OR CONCEALED Do not pay the freight bill until the freezer has been checked for damage Have the car rier note any visible damage on the freight bill If concealed damage and or shortage is found later advise the carrier within ten days and request inspection 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 Insta
14. 44 7 kg 908 lbs 411 8 kg 785 lbs 356 0 kg 935 lbs 424 1 kg 1 PH left right left 31A 31A 21A 45A 45A 30A 3 PH right 21A 30A 1 Phase 220 240 VAC 50Hz or 3 Phase 380 415 VAC 50Hz Two 18 000 Btu hr Two 2 hp Cant Water cooled units require 1 2 N P T Air cooled units require 3 7 6 cm air es water and drain fittings space on right 10 25 4 cm above Two 8 gallon 30 28 liters Se a eee Two 1 33 gallon 5 32 quart 5 4 liters Soft Serve 18 GPH 68 14 liters Shake 27 GPH 102 21 liters AIR COOLED MODEL 2613 16 39 13 16 N 168 1 cm r 101 1 cm R OUT 4 i x A 0 r O Yara S x 67 11 16 172 0 cm C i d 7 49 9 16 125 9 cm 36 15 16 93 8 cm U wW FRONT SA RIGHT SIDE Figure 2a Air Cooled Specification WATER COOLED MODEL 26 13 16 39 13 16 168 1 cm 101 1 cm l i x x a Se O O an Su SS o I SJ r I gt E 65 3 4 167 0 cm 49 9 16 125 9 cm 36 15 16 93 8 cm JUNCTION BOXES oO SI r F T wh FRONT S RIGHT SIDE N Figure 2b Water Cooled Specification 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
15. VE switch in the OFF position F Disconnect from the source of electrical supply in the building 4 11 TROUBLESHOOTING The Troubleshooting Table lists the common problems that can occur to the freezer 24 PROBLEM Drive motor auger kicks out or does not run FREEZER POSSIBLE CAUSE REMEDY Power to freezer is off Drive motor overloaded Check power to freezer Wait 15 20 min for Thermo overload to reset Low line voltage Check must be 10 of nameplate voltage Raise overrun and or product temperature See Section 4 3 or 4 2 Install front door securely Product too hard Front door not installed securely Compressor does not Power to freezer if off operate Drive motor overloaded Check power to freezer Wait 15 20 min for Thermo overload to reset Check must be 10 of nameplate voltage Compressor internal overload is Check condenser air cooled See Sect cut out 4 8 or water suppy water cooled Front door not installed securely Install front door securely Low line voltage Product too soft Temperature setting is too high Product break down Fill with fresh product Standby Serve Switch in Standby Place Standby Serve Switch in Serve position position Adjust temperature See Section 4 2 Freeze up Product Temperature setting is too low will not dispense Low overrun setting easily Low pump pressure
16. atically reposition itself with adapter near C Install side panel and secure with the six retaining black cover NOTICE Each hose is long enough for 3 repositions before replacement is required Record each event on Hose Service Record decal 4 5 MIX PUMP HOSE REPLACEMENT NOTICE Mix pump hose must be replaced when tubing can not be further repositioned every four to eight weeks Failure to comply will result in hose failure and possible pump damage 1 Run cleaning solution through pump 2 Turn pump off and relieve any pressure by opening the spigot screws Figure 29 Temperature Control Cab 4 7 DRIVE BELT TENSION ADJUSTMENT To check belt tension refer to Figure 29 and follow the steps below Disconnect electrical supply to freezer before ser vicing The Mix pump switch must be in the Off when servicing or cleaning pumps position A Remove either side and back panels B Press firmly on one belt Figure 29 C When the tension is properly adjusted the outside of the depressed belt should be approximately in line with the inside of the other belt D Ifanadjustmentis necessary loosen the four motor plate retaining nuts adjust belt tension then re tighten the four nuts NOTICE Belt life will be increased if new drive belts are tight ened after two or three weeks of operation 4 8 CONDENSER CLEANING AIR COOLED FREEZERS The condenser requires periodic cleaning To clean the condens
17. ble Parts 19 9 Sanitize assembled freezer as per instructions outlined in Section 3 9 Figure 24 Cleaning Air Tube Figure 26 Mix Pump Tube Routing 20 SECTION 4 MAINTENANCE INSTRUCTIONS 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 To change the temperature of the product follow the steps below A Loosen the two screws under the header display sign then pull sign out and down B Use a screw driver to make desired adjustment A label near the potentiometer will give complete in structions see Figure 26 Figure 27 Potentiometer 4 3 OVERRUN ADJUSTMENT The product when served is a combination of air and mix Overrun isa measure of the amountof air blended into the mix Overrun can be expressed in terms of the amount of weight loss for a given volume For example if a pint of liquid mix weighs 18 ounces 510 grams and a pint of frozen product with air added weighs 12 ounces 340 grams the overrun is said to be 50 percent 18 oz 510 grams 12 oz 340 grams 6 oz 170 grams 6 12 x 100 50 The overrun can be checked by placing a one pint container on an ice cream scale and zeroing out the scale T
18. cedure may not be needed on a daily basis it will usually follow the cleaning procedure It requires letting a delimer solution soak in the machine for an extended period of time Individual parts are also soaked in adeliming solution for an extended period of time more about delimers in Additional Information 3 SANITIZING After the machine has been cleaned and contains no milkstone the machine is reassembled Then a FDA approved sanitizing solution is run through the machine to kill bacteria The machine is then ready for food preparation As a recommended cleaner and sanitizer for your frozen dessert machine STERA SHEEN has proven to be one of the best daily maintenance producis for CLEANING Thorough removal of all solids including butterfat and milk fat MILKSTONE REMOVAL Complete removal of milkstone SANITIZING FDA approved no rinse sanitizer for food contact surfaces Additional Information THE USE OF DELIMERS A delimer is a strong acid that has the ability to dissolve milkstone This type of chemical may become necessary once high levels of milkstone have developed While these products are very effective for removing HIGH levels of milkstone they are not ideal for two reasons 1 PRODUCT SAFETY Strong acids are dangerous chemicals and handling them requires safety 2 MACHINE DAMAGE Strong acids will attack metal and rubber causing premature wear of parts The use of a delimer needs to be closely
19. container G After five minutes open spigot to expel sanitizing solution Drain all solution from freezer using both spigots See Figure 20 H Close the spigot and place the mix pump switch and the CLEAN OFF SERVE switch in the OFF position The freezer is now sanitized and ready for adding mix 3 10 INITIAL FREEZE DOWN AND OPERATION This section covers the recommended operating proce dures to be followed for the safe operation of the freezer A Sanitize just prior to use according to instructions outlined in this manual B Prepare the desired amount of mix and then fill each storage container with approximately 3 gallons or more of mix Place a container s of mix in the re frigerated cabinet If drawing from a storage container place the draw tube through the cover to the bottom of the container If drawing from a bag in a box re move the cap push out all of the air and insert the adaptor Mix Low Sensor Figure 21 Refrigerated Cabinet Place the mix pump switch in the ON position Im mediately open the spigot and let approximately 8 ounces of liquid mix with sanitizing solution drain out of the spigot Close the spigot and open the air bleed valve on the front door by pushing the valve in and holding Allow the barrel to fill until the mix level is 1 2 2 7 cm below air bleed valve then release valve and pull closed to lock in place Start the compressor and drive by placing the CLEAN OFF SERVE switch
20. de a 100 parts per million strength solution Mix sanitizer in quan tities of no less than 2 gallons of 90 F to 110 F 90 to 110 F 32 C to 43 C water Allow sanitizer to contact the surfaces to be sanitized for 5 minutes Any sanitizer must be used only in accordance with the manufacturer s in structions Figure 19 Air Bleed Valves Risk of Product Damage Avoid prolonged contact of sanitizer with freezer parts Prolonged contact of sanitizer with freezer may cause corrosion of stainless steel parts A Prepare 3 gallons of sanitizing solution following manufacturer s instructions and pour into storage container B Place the mix pump switch in the ON position and open air bleed valve on the front door by pushing valve in and holding see Figure 19 C Letsanitizing solution fill the freezer barrel to air bleed valve then close the valve by pulling out to lock in place D Place the CLEAN OFF SERVE toggle switch in the CLEAN position Figure 20 Draining Sanitizer E Check for leaks when the freezer barrel is first pressurized with sanitizing solution 1 Check for leaks at the plastic front door the O rings may not be sealed 2 Check the drain located at the center of the Drip Tray for leaks coming from the rear of the Rear Auger Seal 3 Check inside cab unit for leaks at hose connec tions F Using a sanitized soft bristle brush or equivalent dipped in sanitizing solution clean mix
21. ded may result in death or serious injury and equipment property damage A CAUTION The signal word CAUTION indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury and equipment property damage CAUTION The signal word CAUTION not preceded by the safety alert symbol indicates a potentially hazardous situa tion which if not avoided may result in equipment property damage NOTICE The signal word NOTICE indicates information or procedures that relate directly or indirectly to the safety or personnel or equipment property 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 The U444 freezer is designed to dispense soft 26 3 4 67 9 cm 34 Freezer with crate Freezer with crate serve product from the left side and shake product from the right side This manual is designed to assist qualified personnel and operators in the installation operation and maintenance of the Stoelting Model U421 and U444 pressure freezer Soft Serve 86 4 cm 26 3 4 67 9 cm 34 86 4 cm 65 3 4 167 0 cm 78 198 1 cm 67 3 4 172 1 cm 78 198 1 cm 39 3 4 101 0 cm 48 121 9 cm 39 3 4 101 0cm 48 121 9 cm 760 lbs 3
22. e Stoelting LLC warrants to the first user the Buyer that the freezer cylinders hoppers compressors drive motors speed reducers augers 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 five 5 years and that all other components of such equipment manufactured by Stoelting will be free from defects in material and workmanship under normal use and proper maintenance appearing within twelve 12 months after the date that such equipment is originally installed 2 Disclaimer of Other Warranties THIS WARRANTY IS EXCLUSIVE AND STOELTING HEREBY DISCLAIMS ANY IMPLIED WAR RANTY OF MERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE 3 Remedies Stoelting s sole obligations and Buyer s sole remedies for any breach of this warranty shall be the repair or at Stoelting s option replacement of the affected component at Stoelting s plant in Kiel Wisconsin or again at Stoelting s option refund of the purchase price of the affected equipment and during the first twelve 12 months of the warranty period deinstallation reinstallation of the affected component from into the equipment Those obliga tions remedies are subject to the conditions that Buyer a signs and returns to Stoelting upon installation the Checklist Warranty Registration Card for the affected equipment b gives Stoelting prompt written no
23. e varies from one manufacturer s mix to another Soft serve mixes should provide a satisfactory product in the 17 to 20 F 7 to 6 C range Most shake mixes freeze to proper consis tency at 27 F 2 8 C Diet and low carb mixes typically freeze to proper consistency at higher temperatures When checking the temperature stir the thermometer in the frozen product to read the true temperature Mix does not improve with age Old mix or mix that has been stored at too high a temperature can result in a finished product that is less than satisfactory from the appearance and taste standpoint To retard bacteria growth in dairy based mixes the best storage temperature range is between 36 to 40 F 2 2 to 4 4 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 When the switch is placed in the OFF position the mix pump will be inopera tive NOTE The mix pump motor is equipped with an internal overload that will trip disabling the pump when the motor is overloaded Consult the trouble shooting section for corrective information The internal over load will automatically reset after cooling If the con dition continues contact a qualified service person CAUTION Risk of Product Da
24. e water supply Install 1 2 12 7mm pipe or 1 2 12 7mm inside diameter copper water line to the freezer Connect water outlet to a drain using a 1 2 12 7mm inside diameter line Automatic washer hoses work well for final connections All water connections must comply with local codes Fig 4 Figure 4 Water Electrical Connections CAUTION Flush all water lines before installation In stores with sediment in water add suitable filter or strainer to water inlet F Place the CLEAN OFF SERVE switches in the OFF position before continuing Figure 11 2 4 INSTALLING PERMANENT WIRING Permanent wiring is required by local codes the following procedure must be performed Hazardous voltage High voltage will shock burn or cause death Turn off and lock out main power disconnect before installing wiring Do not operate machine with cabinet panels removed A Refertothe nameplate atthe 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 shaft rotation Figure 5 bottom rear of the freezer Figure 4
25. ee 4 2 3 Freezer lee une 4 2 4 Installing Permanent Wiring ee 4 2 5 A ee ee 5 AAPP nn CU O A 9 3 1 Safety SCAU MNS sper cece tea la yak ee kala k kek keka keka weka kek yee y 9 3 2 Operating Controls and Indicators kek 9 3 3 Important Information Regarding Cleaning and Sanitizing 11 3 4 Disassembly of Freezer arts 12 3 5 Cleaning Disassembled Parts AAA 13 3 6 Sanitize Freezer Parts cionales 13 3 7 Cleaning the Freezer u een 14 3 8 Assembling the treezer AEN 14 3 9 eve nil n ne ee nO 16 3 10 Initial Freeze down and Operation ENEE 16 3 11 Wed er le E 17 3 12 Operation of Mix PUMP u 18 3 13 Mix Pump Cleaning ste nieuw wekir ka yek ke ke kek awaya up u kak 18 3 14 Disassembly and Inspection of Removable Parts nnnnnnnnnnennennnnnnnnennn 18 SECHON Ad een ee ere k lek arek bek kak kkin k ku kl ee reer reer reer rr rere 21 4 1 Freezer AUS MSN Sen eek 21 4 2 Product Temperature Adjustment keke 21 4 3 Ov r n AdjUSIm ze ee ee 21 4 4 Mix Pump Hose Reposition EEN 22 4 5 Mix Pump Hose Replacement u nennen ee 22 4 6 Cab Temp Adustment AEN 22 4 7 Drive Belt Tension Adjustment nenn kek kS 22 4 8 Condenser Cleaning Air Cooled Freezers E E idi nenn 23 4 9 Preventative Maintenance 23 4 10 Extended Storage u iii 23 4 11 A ee 24 Ge E UE PR PR PES O n o i tirani uma dlana dia a di 29 5 1 How to Order Replacement Parts 29 5 2
26. er refer to the following steps NOTICE Some freezers have a condenser filter to clean re move and wash in warm soapy water Rinse in clean water and shake dry taking care not to damage filter in any way A Visually inspect the condenser for dirt B If the condenser is dirty place a wet towel over the condenser C Using compressed air or CO2 tank blow out the dirt from the back of the condenser Most of the dirt will cling to the wet towel This procedure emits aloud noice Wear hear protec tion to prevent hearing loss D An alternative method is to clean with a con denser brush and vacuum 23 NOTICE If the condenser is not kept clean loss of refrig eration efficiency will result 4 9 PREVENTATIVE MAINTENANCE Itis recommended that a preventative maintenance sched ule be followed to keep the freezer clean and operating properly The following steps are suggested as a preven tative maintenance guide Never attempt to repair or perform any maintenance on freezer until all main electrical power has been disconnected The United States Department of Agriculture and the Food and Drug Administration require that lubricants used in food zones be certified for this use Use lubricants only in accordance with the manufacturer s instructions A Daily Checks Check for any unusual noise or condition and repair immediately B Month Checks 1 Check drive belts for wear and tighten belts if necessar
27. he CIP has been properly performed If any residue is detected clean or replace those parts as outlined below 1 Place CLEAN OFF SERVE switch in CLEAN posi tion Allow the auger to agitate for 5 to 10 minutes 2 Remove suction tube from mix container Draw off the mix remaining in freezer barrel 3 Pump 2 gallons 7 5 liters of cold potable water thru freezer until water at spigot is free of mix 4 Pump 2 gallons 7 5 liters of 90 to 110 F 32 C to 43 C detergent solution water thru freezer The use of soft water is recommended along with dishwashing detergents such as Joy Dawn or equivalent 5 Place mix pump switch in OFF position Open spigot to relieve remaining pressure 6 Place CLEAN OFF SERVE switch in OFF position 3 14 DISASSEMBLY AND INSPECTION OF REMOVABLE PARTS Inspection of removable parts should be made whenever maintenance is performed or pump requires disassembly Hazardous Moving Parts Revolving pump head can grab mangle and cause serious crushing injury The Power switch must be placed in the OFF position for cleaning and power must be disconnected when disassembling or servicing System Under Pressure Never disconnect hoses from freezer or pump without first opening spigot to relieve pressure 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
28. hen fill a one pint container with frozen product The container should be filled over the top and leveled with a straightedge The product should not contain any air pockets When weighed on an ice cream scale one pint 473 milliliters of product should weigh 12 to 13 ounces 340 to 368 5 grams for an overrun of 45 to 50 21 The mix pump thatfills the left freezing cylinder of the U444 has been preset at the factory to produce a soft serve product with approximately 40 overrun The mix pump that fills the right freezing cylinder of the U444 has been preset at the factory to produce a shake product with approximately 50 overrun The left and right pumps on the U421 have been presetto produce a soft serve product with approximately 40 overrun Because of differences inmix formulation temperatures and barometric pressure this figure may vary It willbe necessary for approximately 2 gallons 7 5 liters of mix to be pumped thru the freezer before changes in the product are noticeable due to adjustments in overrun Overrun is controlled by the length of the air compressor piston stroke within the piston cylinder Lengthening the stroke within the cylinder will increase overrun Con versely shortening the stroke will decrease overrun To perform an overrun adjustment refer to the following procedure A Turn the mix pump switch to the OFF position B Remove the lower back panel from freezer C On air compressor side of pump l
29. ials as they will mar the finish A mild alkaline cleaner is recom mended Use a soft cloth or sponge to apply the cleaner For best results wipe in the direction of the grain of the steel Clean the rear seal surface from inside of the freezer barrel B Using this sanitizing solution and the large barrel brush provided sanitize the barrel by dipping the brush in the sanitizing solution and brushing the inside of the barrel Remove the rear drip tray by pulling from side panel Clean and replace drip tray 3 8 ASSEMBLING FREEZER To assemble the freezer parts refer to the following steps NOTICE Petro Gel sanitary lubricant or equivalent must be used when lubrication of freezer parts is specified NOTICE The United States Department of Agriculture and the Food and Drug Administration require that lubri cants used on food processing equipment be certi fied for this use Use Lubricants only in accordance with the manufacturer s instructions Assemble all O rings onto parts dry without lubri cation Then apply a thin film of sanitary lubrication to exposed surfaces of the O rings B Lubricate rear seal area on auger shaft with a thin layer of sanitary lubricant Install the rear seal O ring Lubricate outside of rear seal O ring with sanitary lubricant Install stainless steel rear seal adapter into rear seal dry without lubricant Lubricate inside surface of rear seal adapter and install onto auger shaft DO NOT l
30. in the SERVE position The product will be ready to serve after the compres sor and drive have cycled off or in approximately 12 minutes The refrigeration is automatically actuated when the spigot is opened For normal dispensing open the spigot no more then 90 This is when the handle knob is pointed directly away from the front door This position provides excellent control over the prod uct and aids in making desired shaped portions Close spigot completely after dispensing The freezer is designed to dispense the product at a reasonable draw rate If the freezer is overdrawn the result will be a soft product and air pops If this should occur allow the freezer to run for approximately 30 seconds before dispensing additional product After a while the operator will sense or feel when the freezer is beginning to fall behind and will slow down on the rate of draw so as not to exceed the freezer s capacity Do not operate the freezer when the MIX LOW light is on or with less than 1 3 4 4 4 cm of mix in the mix container Refill the mix container immediately 3 11 MIX INFORMATION Mix can vary considerably from one manufacturer to another Differences in the amountofbutter fat content and quantity and quality of other ingredients have a direct bearing onthe finished frozen product A change in freezer performance that cannot be explained by a technical problem may be related to the mix Proper product serving temperatur
31. indicate precautions and operating instructions inthis manualare 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 a safe working ATTENTION Customer Service environment The labels have been designed to withstand 502 Hwy 67 washing and cleaning All labels must remain legible for Kiel Wisconsin 53042 the life of the freezer Labels should be checked periodi cally to be sure they can be recognized as warning labels Figure 3 Decal Locations 1 324722 Decal Mix Low 23 324015 Decal 2 x 1 1 4 Blk on White 2 324798 Decal Clean Off Serve Switch 24 723552 Tag Caution Supply Voltage 3 324141 Decal Caution Rotating Blades 26 324803 Decal GM Header Stoelting Logo 4 723526 Tag Read Manual amp All Decals 26 324804 Decal GM Header Stoelting Swirl 6 324393 Decal Stoelting Swirl Logo 26 324805 Decal DQ Header DQ Logo 7 324800 Decal Cab ON OFF 27 324346 Decal Caution Hazard Moving 8 324799 Pump On Off 28 324797 Decal Standby Serve 9 324208 Decal Refrig Leak Check 29 324242 Decal Temperature Control 11 324103 Decal Caution Rotating Shaft 30 324200 Decal Manual Reset 12 324686 Decal Danger Automatic Start 32 32
32. llation must be performed by a qualified electri cian refrigeration specialist Incorrect installation may cause personal injury severe damage to the machine and will void factory warranties Lifting hazard Do not attempt to lift freezer manually Use proper lift ing equipment such as a forklift lift table or pallet jack with lifting device positioned beneath the freezer s base Ensure that personnel remain clear of suspended load Failure to do so may result in personal injury and or damage to the freezer that will void any factory warranties Installation of the freezer involves moving the freezer close to its permanent location removing all crating setting in place assembling parts and cleaning A Uncrate the freezer B Install the four casters Turn the threaded end into the freezer until zero threads are showing To level turn out casters no more than 1 4 maximum then tighten all jam nuts C The freezer must be placed in a solid level position NOTE Accurate leveling is necessary for correct drainage of freezer barrel and to insure correct overrun D The freezer must have a minimum of 3 7 5cm 6 15cm high ambient conditions of space on all sides and 10 25cm at the top for proper circula tion CAUTION Risk of product damage Air cooled condenser requires proper ventilation Fail ure to provide adequate ventilation will void factory warranties E Water cooled freezers need an adequat
33. mage Mix pump hose must be repositioned every 1 2 weeks or 60 hours of operation Failure to comply will result in reduced mix pump liquid capacity dispense stop page popping and possible mix pump hose leak age Hose leakage may damage the pump roller as sembly and void the factory warranty A Mix Operation The peristaltic mix pump contains one continuous mix pump hose When looking at the face of the peristaltic mix pump the left side of the hose is the suction or pickup The right side of the hose is the discharge Mix is drawn up the suction side of the hose and transferred thru the discharge side to the freezer see Figure 22 D AirOperation The air compressor operates whenever the peristaltic mix pump is running Air enters thrua check valve on the piston downstroke The air is discharged thru a second check valve on the piston upstroke The air and mix join at the tee and then travel to the freezer Figure 22 Mix Pumps C Theover runadjustmentis preset atthe factory Ifan adjustment becomes necessary refer to Section 4 NOTICE Any cleaning procedure must always be followed by sanitizing before filling freezer with mix Refer to section 3 3 3 13 MIX PUMP CLEANING The mix pump is approved for CIP clean in place and is thoroughly cleaned as cleaning solutions are pumped thru the freezer We recommend completely disassembling the pump and connecting tubing every 14 days for inspection of parts to confirm t
34. nd understand the entire manual before operating or maintaining Stoelting equipment This Owner s Manual provides the operator with information for the safe operation and maintenance of Stoelting equipment As with any machine there are hazards associated with their operation For this reason safety is emphasized throughout the manual To highlight specific safety information the following safety definitions are provided to assist the reader The purpose of safety symbols is to attract your attention to possible dangers The safety symbols and their explanations deserve your careful attention and understanding The safety warnings do not by themselves eliminate any danger 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 A Safety Alert Symbol This symbol Indicates danger warning or caution Attention is required in order to avoid serious personal injury The message that follows the symbol contains important information about safety Signal Word Signal words are distinctive words used throughout this manual that alert the reader to the existence and relative degree of a hazard A WARNING The signal word WARNING indicates a potentially hazardous situation which if not avoi
35. nt to supplementa comprehensive food safety program Soil Materials Associated with Frozen Dessert Machines MILKFAT BUTTERFAT Ascomponents of ice cream frozen custard mix these soils will accumulate on the interior surfaces of the machine and its parts Fats are difficult to remove and help attribute to milkstone build up MILKSTONE Is a white gray film that forms on equipment and utensils that come in contact with dairy products These films will accumulate slowly on surfaces because of ineffective cleaning use of hard water or both Milkstone is usually a porous deposit which will harbor microbial contaminants and eventually defy sanitizing efforts Once milkstone has formed it is very difficult to remove Without using the correct product and procedure it is nearly impossible to remove a thick layer of milkstone NOTE general purpose cleaners DO NOT remove milkstone This can lead to high bacteria counts anda food safety dilemma IT IS BEST TO CONTROL MILKSTONE ON A DAILY BASIS BEFORE IT CAN BECOME A SIGNIFICANT FOOD SAFETY PROBLEM In addition to food safety milkstone can cause premature wear to machine parts which can add to costs for replacement parts or possibly more expensive repairs if worn machine parts are not replaced once they have become excessively worn Important Differences Between Cleaning and Sanitizing CLEANING vs SANITIZING It is important to distinguish between cleaning and sanitizing
36. o scratch inside of F Sanitize all freezer parts following procedures out freezer barrel when removing flights or auger lined below Remove the spring from each auger flight 3 6 SANITIZE FREEZER PARTS A Use asanitizer mixed according to manufacturer s instructions to provide a 100 parts per million strength solution Mix sanitizer in quantities of no less than 2 gallons of 90 to 110 F 32 C to 43 C water Allow the sanitizer to contact the surfaces to be sanitized for 5 minutes Any sanitizer must be used only in accordance with the manufacturer s instructions B Place all parts in the sanitizing solution for 5 minutes then remove and let air dry completely before assem bling in freezer Figure 14 Auger Flight Removal 4 Keep the rear of the auger tipped up once it is clear of the freezer barrel 5 Wipe spline lubricant off hex end of auger witha paper towel Remove the rear seal Figure 15 13 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 A good grade of stainless steel has been used on the freezer to ease clean up To remove spilled or dried mix simply wash the exterior in 90 to 110 F 32 C to 43 C soapy water and wipe dry Do not use highly abrasive mater
37. ocate the long slender piston rocking arm The rocking arm down ward travel is limited by a stationery cam On the face of the cam there is an overrun setting indicator plate numbered 3 thru 8 and an adjustment knob see Figure 27 Overrun Adjustment Figure 28 Overrun Adjustment D The overrun setting is indicated by a pointed pin E To adjust overrun loosen the allenhead screw located within the center of the adjustment knob with the 5 32 4mm allen wrench provided Rotate the adjustment knob counterclockwise to a higher number for higher overrun or clockwise to a lower number for lower overrun Each number multiplied by 10 represents the overrun percentage ie 4 40 overrun 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 CAUTION Never disconnect hoses from freezer or pump with out first opening spigot to relieve pressure 4 4 MIX PUMP HOSE REPOSITION every one or two weeks NOTICE Mix pump hose must be repositioned every 1 2 weeks Failure to comply will result in reduced mix pump liquid capacity dispense stoppage popping and possible mix pump hose leakage 1 Run cleaning solution through pump 2 Turn pump off and relieve any pressure by opening the spigot 3 Grasp the pick up hose end of the mix pump hose with one hand and turn the pump on Pull d
38. ons 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 Maintain a clean work area Avoid accidents by cleaning the area and keeping it clean Stay alert at all times Know which switch push button or control you are about to use and what effect it is going to have Disconnect electrical power for maintenance Never attempt to repair or perform maintenance on the freezer until the main electrical power has been disconnected Do not operate under unsafe operating condi tions Never operate this freezer if unusual or exces sive noise or vibration occurs ee EU EECH KE BN G Ranch 3 2 OPERATING CONTROLS AND INDICATORS Before operating the freezer it is required that the op erator know the function of each operating control Refer to Fig 11 for the location of the operating controls on the freezer Hazardous voltage The CLEAN OFF ON switch must be placed inthe OFF position when disassembling for cleaning or servicing The freezer must be disconnected from electrical supply before removing any access panel Failure to disconnect power before servicing could result in death or serious injury Spigot Switch When the spigot handle is opened the SPIGOT switch will start the auger drive and refrigeration systems When the spigot handle is closed the drive motor and compressor will remain on until
39. ons should be mixed once old solutions become ineffective 3 4 DISASSEMBLY OF FREEZER PARTS Moving machinery can grab mangle and dis member Place the CLEAN OFF SERVE toggle switch in the OFF position before disassembling for cleaning or servicing Placing the CLEAN OFF SERVE toggle switch in the SERVE position dur ing cleaning or servicing may result in serious personal injury Before using the freezer for the firsttime complete freezer disassembly cleaning and sanitizing procedures will need to be followed Routine cleaning intervals and procedures must comply with the local and state health codes Inspection for worn or broken parts should be made at every disassembly of the freezer for cleaning or other purposes All worn or broken parts should be replaced to ensure Safety to both the operator and the customer and to maintain good freezer performance and a quality prod uct Two normal wear areas are the auger flights and front auger support bushing see Figure 12 To disassemble the freezer refer to the following steps Wear Line Figure 12 Auger Flight Wear amp Front Auger Support Bushing Wear A 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
40. own on the pick up hose end until 12 to 14 30 1 2 to 35 1 2cm of tubing has reverse fed through the pump then turn the pump off 4 Loosen small clamp at the pick up hose adapter and Viewed from Back disconnect mix pump hose Disconnect mix pump hose at each end 4 Grasp the discharge hose end with one hand and turn the pump on Pull down on the hose until all of the remaining hose is removed from the pump 5 Connect new mix pump hose to pick up hose adapter using small clamp 6 Insert free end of hose into the pick up Suction side hose side of the black cover Gently push the hose into the black cover until it begins to self feed Allow the hose to feed itself through the pump until the pick up hose adapter pre vents further feeding then turn the pump off 7 Reconnect mix pump hose to T using small clamp Pump is now ready to sanitize 4 6 CAB TEMPERATURE ADJUSTMENT A temperature control is used to control cab temperature To change the temperature follow the steps below A Remove the six screws holding the left side panel 5 Cut 7 1 2 19 cm off the end of the mix pump and remove panel hose B Useasmall screwdriver to adjust the temperature control Turn counterclockwise for a warmer tem 6 Reconnect mix pump hose to adapter perature and clockwise for a colder temperature It will take about an hour for the cab temperature to 7 Continue normal operation Mix hose will change Figure 28 autom
41. r bleed valves Position the O ring in groove close to the wide part Apply a thin film of sanitary lubricant to the O rings J Insert the air bleed valve from the back of the front door Install compression springs onto air bleed valves then screw knobs on finger tight K Apply a thin film of sanitary lubricant to the door seal O rings and fit into the grooves on the rear of the front door L Place the front door assembly onthe mounting studs and push front door against the freezer carefully M Secure front door assembly by placing the knobs on the studs and tighten until finger tight only Do not overtighten ProperO ring seal can be observed through the transparent front door N Move the spigot handles to the closed position 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 The United States Department of Agriculture and the Food and Drug Administration require that all cleaning and sanitizing solutions used with food processing equipment be certified for this use When sanitizing the freezer refer to local sanitary regula tions for applicable codes and recommended sanitizing products and procedures The frequency of sanitizing must comply with local health regulations Mix sanitizer ac cording to manufacturer s instructions to provi
42. se clamp CAUTION DO NOT TWIST MIX PUMP HOSE 7 Turn pump off 8 Allow remaining 6 15cm of tubing to feed through pump until hose adapter prevents further feeding 9 Turn pump off 10 Connect free end of mix pump hose to 3 way Tee 756067 1172864 OQ I U 1151965 756088 Connect 1 2 inch 12 7mm I D plastic food grade tubing to check valve and then to the mix con tainer Observe check valve flow arrow Secure with hose clamps Then place assembly thru hole in cover and install retainer clip Figure 9 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 Figure 9 CAUTION Air Mix tee must remain below the black cover clamp If the tee is above the pump mix will drain to the air compressor resulting in pump damage D Connect mix low cords 376041 694247 762256 Figure 7 Mix Pump Refrigerated Mix Transfer Line Large Port gt 3 way Tee Air Mix N NM op VI mi Figure 8 3 way Tee Low Mix Cord N Cover Retainer Container Clip Figure 9 Mix Inlet Tube amp Probe Assy Clip Figure 10 Hose Holder SECTION 3 INITIAL SET UP AND OPERATION 3 1 SAFETY PRECAUTIONS SAFE OPERATION IS NO ACCIDENT observe these rules A Know the freezer Read and understand the operat ing instructi
43. t pressure is reached then cycle ON and OFF as product is drawn to maintain that pressure Standby Serve Switch The standby serve switch is a two position toggle switch When the switch is placed in the standby position the freezer will cycle to maintain a tempera ture below 41 F 15 C When the switch is in the Serve position the freezer will cycle to maintain a servable product Freezing Switch The freezing switch is a two position toggle switch When the switch is placed in the MAXIMUM position the freezer will be forced to run 30 seconds after the temperature control is satisfied High Head Pressure Cut Out If the head pressure exceeds 445 psig 28 bar air cooled andwater cooled the high head pressure cutout will trip The reset button can be accessed from the side of the freezer Low Mix Light The low mix light will illuminate when the liquid level in the mix container drops below two gallons Front Door Safety Switch The front door safety switch prevents the auger from turning when the front door is removed The switch is open when the door is removed and closed when the door is properly installed 3 3 IMPORTANT INFORMATION REGARDING CLEANING AND SANITIZING Softserve 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 dessertfreezers This information is mea
44. tice of any claimed breach of warranty within the applicable warranty period and c delivers the affected equipment to Stoelting or its designated service location in its original packaging crating also within that period Buyer shall bear the cost and risk of shipping to and from Stoelting s plant or designated service location 4 Exclusions and Limitations This warranty does not extend to parts sometimes called wear parts which are generally expected to deteriorate and to require replacement as equipment is used including as examples but not intended to be limited to o rings auger seals auger support bushings and drive belts All such parts are sold ASIS Further Stoelting shall not be responsible to provide any remedy under this warranty with respect to any component that fails by reason of negligence abnormal use misuse or abuse use with parts or equipment not manufactured or supplied by Stoelting or damage in transit THE REMEDIES SET FORTH IN THIS WARRANTY SHALLBE THE SOLE LIABILITY STOELTING AND THE EXCLUSIVE REMEDY OF BUYER WITH RESPECT TO EQUIPMENT SUPPLIED BY STOELTING AND IN NO EVENT SHALLSTOELTING BE LIABLE FOR ANY INCIDENTALOR CONSEQUENTIALDAMAGES WHETHER FOR BREACH OF WARRANTY OR OTHER CONTRACT BREACH NEGLIGENCE OR OTHER TORT OR ONANY STRICT LIABILITY THEORY
45. ubricate outside of rear auger seal see Figure 16 O Socket Lubricant Figure 16 Rear Seal Lubrciation Lubricate the hex drive end of auger with a small amount of white socket lubricant A small container of socket lubricant is shipped with the freezer Screw the springs onto the studs in plastic flights Spring must be screwed into the flights com pletely to provide proper tension see Figure 17 Figure 17 Spring Installation Install first flights to bottom of auger rotate add successive flights from bottom as the auger is pushed slowly into the freezer barrel Carefully engage auger with drive socket in speed reducer by rotating auger slowly and pushing on end of auger Apply athin film of sanitary lubricant to the inside and outside of the front auger support bearing then place on the front of the auger Assemble the front auger support onto the auger bearing NOTICE Position the front support on auger so legs do not interfere with the pin on the back of the front door assembly Front door must push auger in slightly when it is being tightened to prevent the rear seal from leaking G 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 H 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 ai
46. up hose side of cover Turn on motor switch Also see ltem 1 above Contact local Stoelting Distributor Reposition replace mix pump hose Reposition replace mix pump hose Recent mix out condition Open spigot fully and allow excess air to belch out CAUTION To prevent mix pump damage from dried mix deposits immediately disassemble and clean pump Mix pump hose service life is exceeded Remove mix pump hose Disconnect pump from power source Remove mix pump cover clamp THOROUGHLY rinse three squeeze rollers using a spray bottle filled with hot water Thoroughly clean all mix from pump See Sec 2 5 for hose replacement SOUND DURING OPERATION THIS IS NORMAL Mix hose on wrong air mix tee fitting Refer to diagram for correct hose connections 27 28 SECTION 5 HOW TO ORDER REPLACEMENT PARTS 5 1HOW TO ORDER REPLACEMENT PARTS To assure the receipt of the proper replacement parts supply your Authorized Stoelting Distributor with the following information A Model number of equipment B Serialnumber of model stamped on nameplate C Partnumber part name and quantity needed NOTICE Minimum billing is 50 00 Net 5 2 PARTS LIST AND REFERENCE DRAWINGS The following lists and drawings will aid the user when ordering parts or servicing 29 FRONT DOOR PARTS Drawing Index No Part No Description 7 625133 O ring Front Door 11 624520 O ring Air Bleed Valve 12 694200 Spring Air Bleed Valve 1
47. y Refer to Section 4 7 2 Check the condenser for dirt Refer to Section 4 8 Never attempt to repair or perform any maintenance on freezer until all main electrical power has been disconnected 4 10 EXTENDED STORAGE Refer to the following steps for winterizing the freezer or for storing the freezer over any long period of shutdown time A Clean thoroughly with warm detergent all parts that come in contact with mix Rinse in clear water and dry all parts Do not sanitize NOTICE Do not let cleaning solution stand in freezer barrel or mix pump during the shutdown period B Remove disassemble and clean the front door auger shaft and mix pump Leave disassembled during the shutdown period C Place plastic auger flights in a plastic bag with a moist paper towel This will prevent flights from becoming brittle if exposed to dry air over an extended period of time over 30 days D 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 Run the compressor for 2 3 minutes to open water valve Blow out all water first through water inlet then through water outlet lines with air or carbon dioxide Also drain water supply line to the freezer E Place the mix pump ON OFF switch and the CLEAN OFF SER
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