Vollrath Stoelting O431 Service Manual Download Page 73

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REFRIGERATION DIAGRAM AND WIRING DIAGRAM

Summary of Contents for Stoelting O431

Page 1: ...Model O431 SERVICE MANUAL Manual No 513641 Rev 1...

Page 2: ......

Page 3: ...built prior to date of change 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 q...

Page 4: ...ecific safety information the following safety defini tions are provided to assist the reader The purpose of safety symbols is to attract your at tention to possible dangers The safety symbols and the...

Page 5: ...Motor Profile Cutout Compensation 5 2 Installation Instructions 2 1 Safety Precautions 7 2 2 Shipment and Transit 7 2 3 Machine Installation 7 2 4 Installing Permanent Wiring 7 2 5 Mix Pump 8 A Mix Pu...

Page 6: ...4 Obtaining Readings and Modifying Settings Service Personnel Only 21 4 5 Readings Service Personnel Only 22 4 6 Adjustments Service Personnel Only 23 4 7 Other Settings Service Personnel Only 23 4 8...

Page 7: ...42 6 8 Switches 43 A Spigot Switch 43 B Pump Pressure Switch 44 C Cab Door Magnetic Reed Switch 44 6 9 Temperature Control Sensor 45 7 Troubleshooting 7 1 Error Codes 47 7 2 Troubleshooting Error Code...

Page 8: ......

Page 9: ...tic controls to provide a uniform product The machine 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 d...

Page 10: ...Two 3 4 hp Air Flow Air cooled units require 3 7 6 cm air space on both sides and back Plumbing Fittings Water cooled units require 1 2 N P T water and drain fittings Hopper Volume Two 5 5 gallons 20...

Page 11: ...erature increases to a preset amount Cut In T a 3 second drive motor pre stir analyzes product consistency The pre stir check is also performed each time the spigot handle is opened This check prevent...

Page 12: ...2CutIn and Sl2CtOut During the Sleep 2 Mode the stir cycle runs This cycle is based on preset timed intervals Stir On and Stir Off and prevents product separation The Sleep 2 Mode is often referred to...

Page 13: ...50 F for more than two hours the machine will go into Sleep Mode and a clean message will be shown on the display 1 6 OPERATION DURING SENSOR FAILURE The IntelliTec control is designed to allow the m...

Page 14: ...20 sec Sleep 1 Drive motor on timer Sl1DrOff 180 sec Sleep 1 Drive motor off timer Sl2CutIn 32 F Sleep 2 Cut in temperature Sl2CtOut 28 F Sleep 2 Cut out temperature DftOffTm 600 sec No Sensor Default...

Page 15: ...ING Installation must be completed by a qualified electrician refrigeration specialist Incorrect installation may cause personal injury severe damage to the machine and will void fac tory warranty Ins...

Page 16: ...clamp Be careful not to twist the mix hose 7 Turn the pump on 8 Allow the remaining 6 15cm of tubing to feed through pump until the hose adapter prevents further feeding 9 Turn the pump off CAUTION R...

Page 17: ...ontainer is important The bag that is connected nearest the outlet of the manifold will drain last and should be placed at the back of the mix container The mix low level indicator relies on proper ba...

Page 18: ...manifold adapter Securewithalargehose clamp 3 Push the manifold adapter with spring and valve into the left port nearest the manifold outlet of the mix inlet manifold and secure with retaining clip S...

Page 19: ...ion of the operating controls on the machine For the information regarding error codes displayedonthecontrolpanel refertothetroubleshooting section of this manual A MAIN FREEZER POWER SWITCH The Main...

Page 20: ...ng Cylinder OFF ON switch to the OFF position or press the CLEAN button again If the machine is left in CLEAN for more than 20 minutes an error code E4 will be displayed on the display panel Place the...

Page 21: ...3 Remove the front door by pulling it off the studs 4 Remove the air bleed valve by unscrewing the knob while holding the valve stem from behind Remove the compression spring and push the air bleed va...

Page 22: ...wipe with the grain of the steel A Clean the rear seal surface from inside of the freezing cylinder B Using sanitizing solution and the large barrel brush provided sanitize the freezing cylinder by di...

Page 23: ...processing equipment be certified for this use When sanitizing the machine refer to local sanitary regu lations for applicable codes and recommended sanitizing products and procedures The frequency o...

Page 24: ...DISPLAY 9 Press the left arrow button once The display will read BASIC 10 Press the up arrow button once The display will read CutOut amps 11 Press the SET button A cursor will start blinking under t...

Page 25: ...mix pump switch in the ON position F Place a container under the spigot and open the spigot to allow the mix to flush out about 8 ounces 0 23 liters of sanitizing solution and liquid mix G Open the a...

Page 26: ...on the piston downstroke The air is discharged through a second check valve on the piston upstroke The air and mix join at the tee and then travel to the machine C The overrun adjustment is preset at...

Page 27: ...if applicable as an assembly from the mix container C Completely disassemble the hose assembly and the check valve Fig 3 10 Place hoses tee checkvalveassembly andpickuphoseadapterin 90 to 110 F 32 C...

Page 28: ...20...

Page 29: ...low to lock the control panel A Press and hold the PUSH TO FREEZE button for at least 5 seconds B While still holding the PUSH TO FREEZE button press the CLEAN button once C Release both buttons An as...

Page 30: ...he Cycles setting on the IntelliTec control F and amps Suction line temperature on the freezing cylinder and drive motor amps are available on the same screen to assist with setup and troubleshooting...

Page 31: ...ure of the refrigerant gas in the evaporator at the front of the freezing cylinder Changingthissettingchangesthetemperatureat which the freezing cycle starts This value along with the CutOut value det...

Page 32: ...g Cab Off will not be shown on the IntelliTec menu Cab On If the Refriger value is set to Cabinet and the temperaturesensorinthecabinetfails thissetting determines the length of the refrigeration cycl...

Page 33: ...rough pump B Turn the pump off and relieve any pressure by opening the spigot C Grasp the pickup hose end of the mix pump hose with one hand and turn the pump on Pull down on the pickup hose end until...

Page 34: ...n for 8 seconds While still holding the SEL button press the up arrow button The LCD Screen will read Display B Release both buttons C Press the left arrow button three 3 times to navigate to the Stor...

Page 35: ...ise or condition and repair immediately B Monthly checks 1 Check drive belts for wear and tighten belts if necessary Refer to section 4 12 2 Check the condenser filter for dirt Refer to section 4 13 4...

Page 36: ...28...

Page 37: ...TE For qualified service personnel only Anybody work ing with refrigerants must be certified as a Techni cian TYPE I as required by 40 CFR 82 Subpart F and hold all State and or local refrigerant hand...

Page 38: ...e solenoid valves open 11 If the system will not maintain a standing vacuum test with the vacuum pump off gauge increases towards atmosphere find the leak fix it and evacuate again 5 3 REFRIGERANT CHA...

Page 39: ...ch as any copper line leading to or from the compressor and check terminals C R and S NOTE The compressor is equipped with an internal over load protector If the compressor is warm and ohm meter readi...

Page 40: ...OR The O431 has two freezing cylinder evaporators and a cab evaporator EVAPORATOR TESTING The evaporator can be checked for leaks using the bubble test or using a leak detector NOTE Foam insulation in...

Page 41: ...sink from the TXV D Install bulb on suction line exiting the evaporator using existing clamp The bulb has an indent that must be placed against the tubing NOTE Good contact between the bulb and the su...

Page 42: ...s the only part of the system requiring refrigerant the bypass valve will allow discharge gas to bypass into the suction line to prevent liquid refrigerant from entering the compressor HOT GAS BYPASS...

Page 43: ...the opening point pressure should be increased to slow the water flow Turn the adjustment screw counterclockwise F If the water temperature and high side pressure are too high the opening point pressu...

Page 44: ...AGNETIC COIL REMOVAL A Remove the side panel B Disconnect the electrical wires C Remove the retaining screw from the top of the solenoid and pull the magnetic coil off SOLENOID MAGNETIC COIL INSTALLAT...

Page 45: ...ing appropriate brazing material D Evacuate the system per instructions in Section 5 2 E Recharge the system per instructions in Section 5 3 5 10 CAB UNIT TheIntelliTeccontrolisprogrammedtohandlerefri...

Page 46: ...38...

Page 47: ...ntrol board is connected to the machine through an 8 pin connector a 7 pin con nector and a 6 pin connector Theleftsidemembraneswitch touchpad controlstheleft side of the freezer and the right side me...

Page 48: ...contactor When the spigot is opened or the Push To Freeze button is pressed the DRV LED on the control board will light up After three seconds the CMP LED will light up Refer to Figure 6 4 If the LED...

Page 49: ...sening the set screws B DRIVE MOTOR INSTALLATION 1 Place the drive motor in position and install the four mounting bolts 2 Place the pulley and key on the motor shaft NOTE Do not tighten the pulley sc...

Page 50: ...gearbox to the rear of the barrel 2 Fastenthegearboxtothemountingbracketusing the two bolts 3 Mount the pulley on the gearbox shaft and align with the motor pulley then tighten the allen head screws...

Page 51: ...o the spigot switch should be done after the product is at consistency in Serve Mode or when the machine is empty 1 Open the spigot slowly and listen for a click when the spigot switch closes 2 The cl...

Page 52: ...UMP PRESSURE SWITCH TEST 1 Turn off the pump motor 2 Open the spigot to relieve air pressure in the system 3 Connect a gauge between the 1 4 ID tubing and the air line into the cab The air line is at...

Page 53: ...disconnected from electrical supply before removing any access panel Failure to disconnect power before servicing could result in death or serious injury 6 9 TEMPERATURE CONTROL SENSOR The temperature...

Page 54: ...46...

Page 55: ...themixisbrokendown cleanandsanitizethe machine and replace the mix with fresh product Icecrystalsintheliquidmixcontainercanclogthe mix inlet system and prevent mix from entering the freezing cylinder...

Page 56: ...panel still displays the error condition code refer to the wiring diagram and the temperature sensor value table Check each lead of the sensor to ground for continuity If continuity is found replace...

Page 57: ...IntelliTec control will display an E11 COMMO TIMEOUT Error A COMMO TIMEOUT Error indicates a communication interruption between the display and the control board This error can be caused by a poor co...

Page 58: ...5 Check system Call distributor for service Product does not dispense 1 No mix in hopper 1 Add mix to the hopper 2 Drive motor overload tripped 2 Wait for automatic reset If condition continues call d...

Page 59: ...f 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 remove as much air from the...

Page 60: ...clean pump 1 Mix pump hose service life is exceeded 1 Remove mix pump hose Disconnect pump from power source Remove mix pump cover clamp Clean the rollers a small amount of soapy water Clean mix from...

Page 61: ...ing Instructions 1 324566 Decal Wired According To 1 324584 Decal Adequate Ventilation 3 2 324686 Decal Danger Automatic Start 2 324799 Decal Pump Off On 2 324803 Decal Domed Stoelting Logo Large Head...

Page 62: ...ot Black 5 Pack 2 624664 5 O Ring Middle Center Spigot Black 5 Pack 1 624678 5 O Ring Rear Seal Rear Seal Adapter Black 5 Pack 4 625133 O Ring Front Door Red 2 667868 Seal Rear Auger Orange 2 694200 S...

Page 63: ...lve 2 696152 Clip Lock Check Valve 2 756067 Tubing 1 4 ID Clear Air Line 25 Increments Per Inch 13 2 756079 Tubing 3 8 ID Clear Mix Line 25 Increments Per Inch 24 2 756088 Tubing 1 2 ID Clear Mix Line...

Page 64: ...Cam 4 2158082 Glide Spigot Socket 3 2158260 Handle Spigot Metal Only 3 8 6 STAINLESS STEEL PANELS Part Number Description Quantity 647653 Screw Panel Header Top Cab Door Handle 647899 Screw Panel Sid...

Page 65: ...ssor 1 PH 60 Hz Scroll No Capacitors 1 282076 Compressor 1 PH 50 Hz No Capacitors 284085 Condenser Air Cooled 357102 Motor Fan w Blade Guard Air Cooled Condenser 1 558004 Condensate Pan 1 598031 Pulle...

Page 66: ...wer 1 368325 Filter Air Condenser 1 522858 SV Motor Drive 60 Hz 2 522859 Motor Drive 50 Hz 614233 Speed Reducer 2 718539 Switch Toggle 208 230 1 762275 Valve Magna Check Cab 2 763423 Valve Solenoid 1...

Page 67: ...58010 Indicator Liquid Line 1 493042 Flasher Indicator Light Cab On Off 1 762481 Valve Expansion Has 2 2 762457 SV Valve Expansion w Orifice Cab 1 763422 Valve Solenoid 1 4 Liquid Line Has 3 3 763482...

Page 68: ...Display Module Display Only 2 493041 Indicator Light Cab On Off 1 521686 230 Program Board IntelliTec 208V 230V 2 618180 Relay 282062 282076 Compressor 1 718532 Switch Toggle Freezing Cylinder On Off...

Page 69: ...522307 SV Motor Fan Evaporator Assembly Cab 1 647674 Screw Door Hinge Cab 672724 Sensor Capacitive Cab 2 719123 SV Switch Only Cab Door Hamlin Reed Switch Cab 1 736084 Thermometer Cab 1 2187296 Guard...

Page 70: ...1871 Spring Piston 2 1171872 Piston Spring Seat 2 1171873 Piston 2 1171874 Ball Bearing Single Pump Rocker Arm 2 1171955 Set Screw Eccentric 2 1171956 Washer Crank Arm Nylon 2 1171958 Filter Air 2 117...

Page 71: ...37 717928 432003 SV 1171868 1171867 1171870 1171986 1171985 1171988 2177812 3171952 653042 1171987 1171986 644065 1177681 1171874 1171955 1171981 1171983 1171866 1171982 1171956 1171978 1171979 117197...

Page 72: ...Check Valve Body Black 6 624614 O Ring Top Bottom Center Spigot Black 4 624664 O Ring Middle Center Spigot Black 3 624677 O Ring Spigot Extension Black 4 624678 O Ring Rear Seal Black 5 625133 O Ring...

Page 73: ...65 0 0 0 8 14 REFRIGERATION DIAGRAM AND WIRING DIAGRAM...

Page 74: ...66...

Page 75: ...ons remedies are subject to the conditions that Buyer a signs and returns to Stoelting upon installation the Start Up and Training Checklist for the affected equipment b gives Stoelting prompt written...

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