Stoelting U431 series Owner'S Manual Download Page 5 | Manualshive

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STOELTING, LLC

Tele: 920-894-2293

502 Hwy 67
Kiel, WI 53042-1600

Fax: 920-894-7029

STOELTING

®

OWNER'S MANUAL

FOR

MODEL U431

CAB MODEL SOFT-SERVE PRESSURIZED FREEZER

This manual provides basic information about the freezer. Instructions and suggestions are given
covering its basic operation and care.

The illustrations and specifications are not binding in detail. We reserve the right to make changes
at any time without notice, to the freezer and its components, without incurring any obligation to modify
or provide new parts for freezers built prior to date of change.

DO NOT 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.

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Summary of Contents for U431 series

Page 1: ...Model U431 Serial 17978 and up OWNER S MANUAL Manual No 513568 4 May 2004 Rev 0 ...

Page 2: ......

Page 3: ...d are certified in the Stoelting Technicare program Model No _______________________ Serial No _______________________ Purchase Date ____________________ Start Up Date ____________________ CALL Distributor _________________________ Phone No _________________________ fill in or affix label ...

Page 4: ......

Page 5: ...rations and specifications are not binding in detail We reserve the right to make changes atanytimewithoutnotice tothefreezeranditscomponents withoutincurringanyobligationtomodify or provide new parts for freezers built prior to date of change DONOTATTEMPTtooperatethefreezeruntilinstructionsandsafetyprecautionsinthismanualare readcompletelyandarethoroughlyunderstood Ifproblemsdeveloporquestionsari...

Page 6: ......

Page 7: ... 3 8 Assembling the Freezer 14 3 9 Sanitizing 16 3 10 Initial Freeze down and Operation 16 3 11 Mix Information 17 3 12 Operation of Mix Pump 18 3 13 Mix Pump Cleaning 18 3 14 Disassembly and Inspection of Removable Parts 18 Section 4 21 4 1 Freezer Adjustment 21 4 2 Product TemperatureAdjustment 21 4 3 Overrun Adjustment 21 4 4 Mix Pump Hose Reposition 22 4 5 Mix Pump Hose Replacement 22 4 6 Cab ...

Page 8: ... Figure 13 Front Door Disassembly 13 Figure 14 AugerFlightRemoval 13 Figure 15 Rear Seal Removal 13 Figure 16 Rear Seal Lubrication 14 Figure 17 SpringInstallation 14 Figure 18 Front Door Assembly 15 Figure 19 Air Bleed Valves 16 Figure 20 Draining Sanitizer 16 Figure 21 Refrigerated Cabinet 17 Figure 22 Dispensing Product 17 Figure 23 MixPumps 18 Figure 24 RemovableParts 19 Figure 25 Cleaning Air...

Page 9: ...he freezer is designed to operate with almost any type of commercial soft serve or non dairy mixes available including ice milk ice cream yogurt and frozen dietary desserts This manual is designed to assist qualified personnel and operators in the installation operation and maintenance of the Stoelting Model U431 pressure freezer Figure 1 Model U431 Freezer Figure 2 Specification ...

Page 10: ... i R 2 1 1 8 4 1 2 7 1 8 0 2 2 1 1 6 1 1 2 7 1 6 7 1 s p m A g n i n n u R l a t o T 1 2 6 2 1 3 6 3 1 2 1 2 1 3 1 3 y t i c a p m A t i u c r i C m u m i n i M 0 3 5 3 5 4 0 5 0 3 0 3 5 4 5 4 r e k a e r B t i u c r i C x a M R C A H 0 3 5 3 5 4 0 5 0 3 0 3 5 4 5 4 e z i S e s u F m u m i x a M R O S S E R P M O C h c a e H U T B 0 9 6 1 1 R O T O M E V I R D h c a e P H 2 G N I L O O C e c n a r...

Page 11: ... a safe working environment The labels have been designed to withstand washing and cleaning All labels must remain legible for the life of the freezer Labels should be checked periodically to be sure they have not been painted over rubbed off fallen off and can be recognized as warning labels If you are in need of replacement labels indicate the part number type of label location of label and quan...

Page 12: ...m at the top for proper circula tion CAUTION FAILURE TO PROVIDE ADEQUATE VENTILA TION WILL VOID WARRANTY E Water cooled freezers need an adequate 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 ...

Page 13: ...Allow the hose to feed itself thru the pump until 6 15cm remains on the entering side 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 on 8 Allowremaining6 15cm oftubingtofeedthrupump until hose adapter prevents further feeding 9 Turn pump off 10 Connect free end of mix pump hose to 3 way Tee as shown in Figure 7 W...

Page 14: ... in cover and install retainer clip See Figure 9 C Connect 1 2 inch 12 7mm I D plastic food grade tubing between the large port of air mix tee and refrigerated mix transfer line Secure with large hose clamp or equivalent See Figure 9 CAUTION AIR MIX TEE MUST REMAIN BELOW THE BLACK COVER CLAMP IF THE TEE IS ABOVE THE PUMP MIX WILL DRAIN TO THE AIR COMPRESSOR RESULTING IN PUMP DAMAGE D Connect mix l...

Page 15: ...nlet Tube Probe Assy Clip Refrigerated Mix Transfer Line Å Å Å Å Å Large Port Air Mix 3 way Tee Æ Æ Æ Æ Æ Low Mix Cord Cover Retainer Clip Mix Container Ì Ì Ì Ì Ì É É É É É Ç Ç Ç Ç Ç Hose Holder Figure 10 Hose Holder Å Å Å Å Å È È È È È ...

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Page 17: ...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 in the CLEAN position the refrigeration sys tem will be off and auger will rotate for cleaning 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 positi...

Page 18: ...SIG 28 bar air cooled andwater cooled the high head pressure cutout will trip The reset button can be accessed from the side of thefreezer J Low Mix Light The low mix light will illuminate when the liquid level in the mix container drops below two gallons K 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 t...

Page 19: ...ese terms may sound synonymous they are not BOTH are required for adequatefoodsafetyandpropermachine 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 cleanin...

Page 20: ...ion 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 PRODUC...

Page 21: ...ssembled 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 followingproceduresareageneralguidelineonly Consult your local and state health c...

Page 22: ...tructions Figure 17 Spring Installation E Install first flights to bottom of auger rotate add successiveflightsfrombottomastheaugerispushed slowlyintothefreezerbarrel Carefullyengageauger with drive socket in speed reducer by rotating auger slowly and pushing on end of auger F Applyathinfilmofsanitarylubricanttotheinsideand outsideofthefrontaugersupportbearing thenplace on the front of the auger A...

Page 23: ...ht K Apply a thin film of sanitary lubricant to the door seal O rings and fit into the grooves on the rear of the frontdoor L Placethefrontdoorassemblyonthemountingstuds and push front door against the freezer carefully M Secure front door assembly by placing the knobs on the studs and alternately tighten opposite corners until finger tight only Do not overtighten Proper O ringsealcanbeobservedthr...

Page 24: ... 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 3 9...

Page 25: ... that has been stored at too high a temperature can result in a finished product that is less than satisfactory from the appearanceandtastestandpoint Toretardbacteriagrowth in dairy based mixes the best storage temperature range is between 36 to 40 F 2 2 to 4 4 C C Place the mix pump switch in the ON position The mix pump switch is located in the upper left hand corner inside the refrigerated cabi...

Page 26: ...valve on the piston upstroke The air and mix join at the tee and then travel to the freezer 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 thoroughlycleanedascleaningsolutionsarepumpedthru the freezer We recommend completely disassembling thepumpan...

Page 27: ...ittings Rinse all parts in clean 90 to 110 F 32 C to 43 C water see Figure 24 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 25 and 26 6 Prepare two gallons 7 5 liters of sanitizing solution using a USDA certified grade sanitizing soluti...

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Page 29: ...le one pint 473 milliliters of product should weigh 12 to 13 ounces 340 to 368 5 grams The mix pump has been preset at the factory to produce a product with approximately 40 overrun Because of differences in mix formulation temperatures and baro metric pressure this figure may vary It will be necessary for approximately 2 gallons 7 5 liters of mix to be pumped thru the freezer before changes in th...

Page 30: ...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 NOTE 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...

Page 31: ...llowed to keep the freezer clean and operating properly The following steps are suggested as a preven tative maintenance guide WARNING NEVER ATTEMPT TO REPAIR OR PERFORM ANY MAINTENANCE ON FREEZER UNTIL ALL MAIN ELECTRICAL POWER HAS BEEN DIS CONNECTED The United States Department of Agriculture and the Food and Drug Administration require that lubricants used in food zones be certified for this us...

Page 32: ...e 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 SERVE switch in the OFF position F Disconnect from the source of electrical supply in the building 4 11 TROUBLESHOOTING The Troublesho...

Page 33: ...r r a b n i t e k c o p r i a e g r a L 4 e s i w k c o l c r e t n u o c g n i n r u t r e g u A 5 2 4 n o i t c e S e e S e r u t a r e p m e t t s u j d A 1 3 4 n o i t c e S e e S n u r r e v o e s i a R 2 e r u s s e r p p m u p k c e h C 3 l e r r a b m o r f r i a e g r u P 4 e s i w k c o l c o t n o i t a t o r e g n a h C 5 s k a e l l a e s r e g u a r a e R d e t a c i r b u l t o n l ...

Page 34: ... U P N O P M U P N R U T O R E Z O T E R U S S E R P M E T S Y S E C U D E R O T S T N I P E S O H P U K C I P D N A t n e t x e e h t o t r i a f o g a b x i m e h t e g r u p g a b x i m e h t o t e s o h p u k c i p e h t g n i t c e n n o c e r o f e B T N A T R O P M I e l b i s s o p x i M f o t u O y l p p u s x i m h s i n e l p e R p m a l c r e v o c k c a l b e d i s n i d e k n i k e s...

Page 35: ... n e p O E V O B A 4 2 E E S O S L A E T O N P M U P M O R F E G A K A E L X I M 8 n a e l c d n a e l b m e s s a s i d y l e t a i d e m m i s t i s o p e d x i m d e i r d m o r f e g a m a d p m u p x i m t n e v e r p o T N O I T U A C p m u p d e d e e c x e s i e f i l e c i v r e s e s o h p m u p x i M r e w o p m o r f p m u p t c e n n o c s i D e s o h p m u p x i m e v o m e R Y L H G...

Page 36: ...28 ...

Page 37: ...got Ext 2177073 64mm 2 5 inch Spigot Ext 2177074 76mm 3 inch Spigot Ext 232734 Rosette Cap 624677 Castle Top O Ring 1 2177588 1 Door w Pins CE 624654 O Ring Spigot Extension 2158070 38mm 1 5 inch Spigot Ext 2159688 64mm 2 5 inch Spigot Ext 2157869 76mm 3 inch Spigot Ext 232732 Rosette Cap 2 1158091 1 Actuator Door Safety 3 3159696 2 Spigot Outside 4 3158086 1 Spigot Center 5 624598 4 O Ring 6 6246...

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Page 39: ...859 1 Rear Seal Adaptor 8 667868 1 Rear Seal MISCELLANEOUS PARTS Description Part No 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 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 Tr...

Page 40: ...32 Figure 7 Mix Pump ...

Page 41: ...cond bkt rear 2 on evap enclosure sides 2 324208 Attn Ref Lk Chk on evap enclosure sides 2 723552 Tag Supply volt inside J Box 1 723517 Card Inside one J Box 2 ID Tags Back Panel Top 1 324548 Add Vent Back Panel Ctr Top 1 Made in U S A Back panel 2 324103 Caution Rot Shaft on gearbox support bracket 2 324151 Field Connections J Box cover outside 3 324125 Danger Elec Shock J Box covers outside back...

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Page 44: ...36 D I S C H AR G E S U C TI O N D I SC H AR G E S U C TI O N ...

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Page 46: ...38 D I S C H AR G E SU C T I O N D I S C H AR G E S U C TI O N ...

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Page 51: ...ies 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 notice 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...

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