Bunn AFPO-2 SL Water Dispenser User Manual
Contents
1. 49 i dM SOLENOID 2 SWITCH 2 SOLENOID SWITCH 2 PUMP SW ITCH 1 RED BLK L YEL BENE 3 BLK 1022 1 e REDIBLK oT B 1 0 8 vio 4 10 230 VOLT 2 WIRE SINGLE PHASE 5 3 BRN BLK SW1C ML 25 Dy m mmi md 4 mI 5 GRN 12 ER REFILL ON OFF BRN BLK REFILL ON OFF SWITCH nm RED BLK WHI VACUUM SWITCH 2 VACUUM SWITCH 1 WHI PROBE PROBE CONTROL CONTROL 1 2 28791 0115002. 2 Separate the two halves of the pump and carefully remove the tubing from within 3 Hold the new pump head as shown in Fig 24 with rollers the 2 6 and 10 o clock positions 4 Reinstall tubing in the new pump head by wrap ping the tubing around the rollers as shown in Fig 24 5 Insert the slot of the tubing key Supplied as TUBING shown in Fig 24 on the rotor so the bottom edge KEY of the key is pressing the tubing into the pump head cavity as shown in Fig 25 6 Hold the tubing and rotor in the pump head and remove key carefully 7 Squeeze the pump body and pump heads together simultaneously until pump body and pump head are touching on all sides Be careful not to pinch the tubing between the pump body and the pump head 8 Place the new pump body on the rotor shaft 9 Replace the four thumbscrews to secure the pump to the motor assembly Finger tighten only FIG 24 TUBING START POSITION FIG 25 TUBING LOADED 20 28791 040501 SERVICE cont VACUUM SWITCHES If continuity is not present as described the vacuum switch is operating properly If continuity is presentas described withouta vacuum generated by an empty product concentrate replace FIG 26 VACUUM SWITCHES Location The vacuum switches are located inside autofill box mounted on the left side of the solenoid mount ing bracket just below the needle valves the vacuum switch Removal and Replacement 1 2 Dis
3. FIG 19 SOLENOID WATER SWITCH TERMINALS 17 28791 040501 SERVICE cont TEST OPERATE ON OFF SWITCH FIG 20 TEST OPERATE SWITCH Location The test operate switch is located inside the autofill box on the right side Test Procedures 1 Disconnect the dispenser from the power source 2 Remove the black wire from the top center switch terminal 3 Connect the dispenser to the power source With a voltmeter check the voltage across the black wire removed from the test operate switch and the white wire from one of the solenoids The indica tion must be BLK to Circuit Board J4 3 a 120 volts ac for two wire 120 volt models b 200 to 240 volts ac for two wire 200 or 240 volt models 230 volts ac for two wire 230 volt models 5 Disconnect the dispenser from the power source If voltage is present as described proceed to 6 If voltage is not present as described refer to the Wiring Diagrams and check the wiring harness 6 Disconnect the wires from the left and center terminals 7 Check for continuity across the left and center terminals in rows one two three and four with the switch in the operate position Continuity should not be present across the left and center terminals with the switch in the center or Test position If continuity is present as described replacethe wires The switch is operating properly If continuity is not present as described replace the switch Remov
4. or other suitable water hose to the WATER INPUT Ensure water regulator is set at 20 psi 137 9 kPa Press the TEST OUTPUT switch and while water is flowing from the test hose check that the gauge reads 20 Place a one cup container under the test hose Press the TEST OUTPUT switch and carefully measure and note the elapsed time from when water first flows form the test hose to when one cup of water has been dispensed Hoses and tubing should be primed and free of substantial air spaces and or bubbles prior to calibration 4 28791 040501 MIX RATIO ADJUSTMENTS cont 6 Compare results with chart or formula below 7 Ifthe time observed is too short or long turn the needle valve clockwise or counterclockwise respectively little at a time Repeat from the preceding step until correct Mix ratio water flavor Time for FLAVOR OUTPUT 1 2 cup Time for WATER OUTPUT 1 cup 1 1 assume 20 sec or obtain time per note below 40 sec or 2 times flavor output time 2 1 assume 20 sec or obtain time per note below 20 sec or equal to flavor output time 3 1 assume 20 sec or obtain time per note below 13 3 sec or 0 67 times flavor output time 4 1 see below assume 20 sec or obtain time per note below 10 sec or 0 5 times flavor output time 5 1 assume 20 sec or obtain time per note below 8 sec or 0 4 times flavor output time 6 1 assume 20 sec or obtain time per note below 6 7 sec or 0 33 times flavor
5. Hose 1 Cable 2 with Hosez2 etc 3 28791 040501 INITIAL SET UP cont 5 f 1 12 Connect one end of input hoses to the auto refill box and the other end to the product container Product container connectors BIB are not supplied Install your own interface Connect water line to auto refill box A minimum of 20 psi 138 kPa is required NOTE Make sure all connections are made before connecting the auto refill box to the power source Each product container has an ON OFF refill switch located on the front of the auto refill box A second switch for each hopper is at the probe housing assembly These are 3 position switches high level low level and a center OFF position Place the main ON OFF switch and ON OFF refill switches in the OFF position Make sure all hoses are connected Place the main ON OFF switch in the ON position Place one of the ON OFF refill switches in the position after a four second delay product will begin to flow through the hoses into the hopper Be sure the switch selected is filling the correct hopper if not check the labels See NOTE in step 74 To test refill circuit short out probes on one of the hoppers with a screwdriver so that hopper should shut off Remove the screwdriver and the hopper will start to fill again after a four second delay If hopper does not start to fill check labels refer to NOTE in step 74 To change mix rat
6. OTHERWISE SHALL BE LIMITED AS SPECIFIED HEREIN TO REPAIR OR AT BUNN S SOLE OPTION REPLACEMENT OR REFUND In no event shall Bunn be liable for any other damage or loss including but not limited to lost profits lost sales loss of use of equipment claims of Buyer s customers cost of capital cost of down time cost of substitute equipment facilities or services or any other special incidental or consequential damages USER NOTICES Carefully read and follow all notices on the equipment and in this manual They were written for your protection All notices are to be kept in good condition Replace any unreadable or damaged labels This equipment is to be installed to comply with the Basic Plumbing Code of the Building Officials and Code DO OVERLOAD CIRCUIT ALWAYS ELECTRICALLY GROUND THE CHASSIS OR ADAPTOR PLUG DO DEFORM PLUG OR CORD FOLLOW NATIONAL AND LOCAL ELECTRICAL CODES Administrators International Inc BOCA and the Food Service Sanitation Manual of the Food and Drug Administration FDA KEEP COMBUSTIBLES AWAY FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE FIRE OR SHOCK HAZARD READ THE ENTIRE OPERATING MANUAL 00656 0000 BEFORE USING THIS PRODUCT 00986 0002E 5 98 1994 Bunn O Matic Corporation 00986 0002 2 28791 051599 ELECTRICAL REQUIREMENTS CAUTION The dispenser must be disconnected from the power source until specified in nitial Set Up The 120 volt version of this
7. TERMINALS 28791 040501 SERVICE cont If continuity is present as described reconnect the REFILL SWITCHES wires to the switch terminals If continuity is not present as described replace the switch Removal and Replacement 1 Remove the wires from the switch terminals 2 Compress the clips inside the autofill box and gently push the switch through the opening in the front of autofill box Push the new switch into the opening and spread the clips to hold switch in the autofill box 4 Referto Fig 15 when reconnecting the wires Operate Switch RED BLK to Vacuum Switch 1 FIG 14 REFILL SWITCHES Location The refill switches are located on the upper right front of the autofill box 2 AFPO 2 amp 3 Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect thetwo white red brown black or red black wires from the switch terminals Connectthe dispenser to the power source Check for voltage across the white red brown black or red black wires from the test operate switch and the white wire on solenoid Z2 or Z3 The indication must be a 120 volts ac for two wire 120 volt models b 200 to 240 volts ac for two wire 200 or 240 volt WHI RED from Test models Operate Switch c 230 volts ac for two wire 230 volt models WHI RED to Vacuum 4 Disconnect the dispenser from the power source Switch 3 BRN BLK from Test Operate Switch BRN BLK to Vacuum Switch 2 3 AFP
8. solenoid valve 6 Check the solenoid valve for coil action Connect the dispenser to the power source Press the solenoid water switch and listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts 7 Disconnectthe dispenser from the power source If the sound is heard as described and water will not pass through the solenoid valve there may be a blockage in the water inlet before the solenoid valve or the solenoid valve may require inspection for wear and removal of waterborne particles If the sound is not heard as described rebuild or replace the solenoid valve Solenoid Valve Repair 1 Remove the wires from the solenoid valve to be repaired 2 Turn off the water supply to the dispenser 3 Removethe nut securing solenoid valve coil to the base 4 Remove guide washer o ring plunger spring and inspect for wear Replace parts as required 5 Install new o ring in the solenoid valve base 6 Install plunger spring in the guide with spring to the bottom of the guide 7 Install guide with the plunger spring into the sole noid valve base 8 Install washer on guide 9 Install coil with retainer on guide and secure with nut 10 Refer to Fig 17 and reconnect the wires WHI from Main Harness WHI to Solenoid 2 BLU from Solenoid Switch 1 WHI to Solenoid 1 WHI to Pump 1 VIO from Solenoid Switch 2 _ WHI VIO from Solenoid Switch 3 WHI
9. 00 to 240 volts ac for two wire 200 or 240 volt models 230 volts ac for two wire 230 volt models 4 Disconnect dispenser from the power source If voltage is present as described replace the pump If voltage is not present as described refer to the Wiring Diagrams and check main wiring harness Pump Motor Removal and Replacement NOTE Do not disconnect or damage tubing Tubing is not replaced when pump is replaced 1 Disconnect the pump motor leads 2 Removethefourthumb screws securing the pump head to the pump body 3 Remove the two 78 32 keps nuts securing the pump motor bracket assembly to the refill unit 4 Remove the two 76 32 screws securing the pump motor to its mounting bracket 5 Reattach this bracket to the new motor and rein stall the assembly in the refill unit 6 Reattach the pump head to the rear of the pump motor with the four thumbscrews 7 Reconnectthe pump motor leads Refer to Fig 23 to reconnect the wires Pump Removal and Replacement NOTE Do not disconnect or damage tubing Tubing is not replaced when pump is replaced 1 Removethe fourthumb screws securing the pump head to the pump body WHI from Solenoid 2 S wae YEL from Pump Switch 1 Lig eA WHI from Pump 1 OORN from Pump Switch 2 We 2 WHI from Solenoid 3 RED from Pump Switch 3 FIG 23 VACUUM SUPPLY PUMP TERMINALS 28791040501 SERVICE cont VACUUM SUPPLY PUMP TUBE INSTALLATION
10. 01 SERVICE cont PUMP FLAVOR ON OFF SWITCHES P1521 FIG 12 PUMP FLAVOR START SWITCHES Location The pump flavor START switches are located on the switch mounting plate inside the autofill box on the right side Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the wires from the switch to be tested 3 Check for continuity across the terminals on the switch when itis held in the on position Continuity must not be present across these terminals in the released position If continuity is present as described reconnect the wires to the switch If continuity is not present as described replace the switch Removal and Replacement 1 Disconnect the dispenser from the power source 2 Remove the wires from the switch terminals 3 Compress the clips inside the autofill box and gently push the switch through the opening 4 Pushthe new switch into the opening and spread the clips to hold switch in the autofill box 5 Referto Fig 13 when reconnecting the wires 1 AFPO 2 amp 3 BLK from Solenoid Switch 71 BLK to Test Operate Switch RED BLK to Test Operate Switch YEL to Pump 1 2 AFPO 2 amp 3 BLK from Solenoid Switch 1 BLK to Solenoid Switch 2 BRN BLK to Test Operate Switch ORN to Pump 2 3 AFPO 3 ONLY BLK from Solenoid Switch 2 BLK to Solenoid Switch 3 WHI RED to Test Operate Switch RED to Pump 3 P1524 FIG 13 PUMP FLAVOR SWITCH
11. 2 1 6000 3000 3 4 3 4 3000 6000 AFPO 2 AFPO 3 FIG 9 SIGNAL CABLE PINS 6000 1538 5 With the probe box switch in LOW position check the resistance across the signal cable pins see Fig 9 6 If readings match values indicated the probe system is functioning properly If not check the probe boxes Probe Boxes 1 Disconnect the signal cable from the probe boxes 2 Remove probe box from CDS hopper 3 Place the switch on the probe box in the HIGH position 4 Check the resistance across the box cable pins see Fig 10 3000 2 amp 3 10 5 5 With the probe box switch in the LOW position check the resistance across the pins refer to Fig 10 6 If readings match the values indicated the probe system is functioning properly Switch Removal and Replacement 1 Remove the 6 thread cutting screw securing the probe housing cover to the probe housing 2 Remove the wires from the switch terminals 3 Compress the clips inside the probe box and gently push the switch through the opening 4 Push the new switch into the opening and spread the clips to hold switch in the autofill box 5 Refer to Fig 11 when reconnecting the wires BLU HIGH from Probe Box Cable GRN OFF from Probe Box Cable TAN LOW from Probe Box Cable FIG 11 PROBE LOW OFF HIGH SWITCH TERMINALS 28791 0405
12. AFPO 2 AFPO 2 SL AFPO 3 AFPO 3 SL OPERATING amp SERVICE MANUAL BUNN O MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 FAX 217 529 6644 28791 0000 4 01 1998 Bunn O Matic Corporation www bunnomatic com INTRODUCTION This equipment supplies a liquid concentrate mixed with water at various ratios to the hoppers on the CDS 2 or CDS 3 dispensers It is for indoor use only on a sturdy counter or shelf WARRANTY Bunn O Matic Corp Bunn warrants the equipment manufactured by itto be commercially free from defects in material and workmanship existing at the time of manufacture and appearing within one year from the date of installation In addition 1 Bunn warrants electronic circuit and or control boards to be commercially free from defects in material and workmanship for two years from the date of installation 2 Bunn warrants the compressor on refrigeration equipment to be commercially free from defects in material and workmanship for two years from the date of installation 3 Bunn warrants that the grinding burrs on coffee grinding equipment will grind coffee to meet original factory screen sieve analysis for three years from date of installation or for 30 000 pounds of coffee whichever comes first This warranty does not apply to any equipment component or part that was not manufactured by Bunn or that in Bunn s judgement has been affected by misuse neglect alte
13. O 3 ONLY If voltage is present as described proceed to 5 If voltage is not present as described refer to the Wiring Diagrams and check dispenser wiring harness FIG 15 REFILL SWITCH TERMINALS 5 Check for continuity across the switch terminals with the switch in the ON position Continuity must not be present when the switch is in the OFF position 15 28791 040501 SERVICE cont SOLENOIDS FIG 16 SOLENOIDS Location The solenoids are located inside the autofill box Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the white violet violet or blue wire and the white wire from the solenoid 3 Connectthe dispenser to the power source Press the solenoid water switch and with a voltmeter check the voltage between the white wire and either the blue violet or white violet wire The indication must be a 120 volts ac for two wire 120 volt models b 200 to 240 volts ac for two wire 200 or 240 volt models C 230 volts ac for two wire 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 75 If voltage is not present as described refer to the Wiring Diagrams and check dispenser wiring harness 5 Checkfor continuity across the solenoid valve coil terminals If continuity is present as described refer to Fig 17 and reconnect the wires to the solenoid If continuity is not present as described replace the
14. Refer to Service Solenoids for test procedures See page 16 The thermal switch will reset but requires up to 30 minutes of cooling time See NOTE below NOTE This refill unit should not be used to initially fill the hopper Running the motor for extended periods will trip the thermal switch The thermal switch will reset but requires up to 30 minutes of cooling time 28791 040501 SERVICE This section provides procedures for testing and replacing various major components used in this dispenser should service become necessary Refer to Troubleshooting for assistance in determining the cause of any problem WARNING Inspection testing and repair of electri cal equipment should be performed only by qualified service personnel The dispenser should be un plugged when servicing except when electrical tests are required and the test procedure specifically states to plug in the dispenser COMPONENT ACCESS WARNING Disconnect the dispenser from the power source before the removal of any panel or the replace ment of any component All components are accessible by removing the eight 8 32 screws five on the front and three on the rear securing the main housing to the main mount ing panel and the removal of the four 8 32 nuts se curing the pump solenoid switch panel to the sole noid mounting bracket Refer to Fig 1 Refer to the contents listing for component loca tion Contents D
15. al and Replacement 1 Disconnect the dispenser from the power source 2 Remove the wires from the switch terminals 3 Compresstheclips inside onthe backofthe switch panel and gently push the switch through the opening 4 Pushthe new switch into the opening and spread the clips to hold the switch in the switch panel 5 Referto 21 when reconnecting the wires BLK from Main ON OFF Switch BLU from Solenoid Switch 71 VIO from Solenoid Switch 2 1 WHI VIO from Solenoid Switch 3 gt RED BLK from Pump Switch 1 RED BLK to Refill Switch 1 BRN BLK from Pump Switch 2 BRN BLK to Refill Switch 2 WHI RED from Pump Switch 3 _ WHI RED to Refill Switch 3 FIG 21 TEST OPERATE SWITCH TERMINALS 28791 040501 SERVICE cont VACUUM SUPPLY PUMP ASSEMBLY 21 P15 FIG 22 VACUUM SUPPLY PUMP ASSEMBLY Location The vacuum supply pumps are located inside the autofill box Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the white wire from the pump lead and the yellow orange or red wire from the other lead 3 Connect the dispenser to the power source With a voltmeter check the voltage across the white wire and yellow orange or red wire Push the pump flavor switch for the pump to be tested The indication must be a 120 volts ac for two wire 120 volt models b 2
16. ce the fuse Removal and Replacement Fuse 1 Remove the cap from the fuse holder 2 Remove fuse from the fuse holder and inspect If blown discard 3 Install new 10 amp fuse in the fuse holder 4 Reinstall fuse holder cap Fuse Holder 1 Disconnect the dispenser from the power source 2 Disconnect the wires from the rear of the fuse holder 3 Remove the nut securing the fuse holder to the front of the main mounting panel 4 Pushthefuse holder through the hole in the panel 5 Install new fuse holder and fuse through the hole in the panel 6 Secure the fuse holder to the panel 7 Referto Fig 5 and reconnect the wires BLK from Main Wiring Harness BLK to Main ON OFF Switch G 5 FUSE HOLDER TERMINALS P1331 F 28791 040501 SERVICE cont MAIN ON OFF SWITCH FIG 6 MAIN ON OFF SWITCH Location The main ON OFF switch is located on the lower right front of the autofill box just above the power cord Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the black wire from the fuse holder and the white wire from pump 1 Connect the dispenser to the power source Check for voltage across the black wire removed from the switch and the white wire removed from pump 1 The indication must be a 120 volts ac for 2 wire 120 volt models b 200 to 240 volts ac for two wire 200 or 240 volt models 230 volts ac for two wire 230 volt mode
17. connect dispenser from the power source Removal of the two 8 32 keps nuts securing the pump motor assembly nearest the vacuum switches is required to access the lower vacuum switch Disconnectthe inputtubes from the vacuum switch to be replaced Disconnect the wires on the vacuum switch to be removed Remove the two 4 40 screws securing the vacuum switch to the solenoid bracket Remove and dis card switch Using two 4 40 screws secure the new vacuum switch to the solenoid bracket 7 Refer to Fig 27 and reconnect the wires Test Procedure 8 Connect the inputtubes to the new vacuum switch 1 Disconnect the dispenser from the power source 9 Restore the pump motor assembly to its normal 2 Disconnect flavor input lines 3 Disconnect white red red black or the brown black wires on the vacuum switch 4 Check for continuity across the switch leads mounting position using the two 8 32 keps nuts ON WHI RED from Refill ON OFF Switch 3 MESE WHI RED to Circuit Board J4 2 o ____ RED BLK from Refill ON OFF Switch 1 RED BLK to Circuit Board J4 5 lt gt BRN BLK from Refill ON OFF Switch 2 BRN BLK to Circuit Board J4 4 FIG 27 VACUUM SWITCH TERMINALS 28791 040501 PIPING DIAGRAM AFPO 2 The only difference between the AFPO 2 3 and AFPO 2 3 SL is the SL models have a water output line and a flavor output line for each product This allows the water and flavor to be mixed in the CDS hoppe
18. ct the Bunn O Matic Technical Service Department Inspection testing and repair of electrical equipment should be performed only by qualified service personnel All electronic components have 120 volt ac and low voltage dc potential on their terminals Shorting of terminals or the application of external voltages may result in board failure Intermittent operation of electronic circuit boards is unlikely Board failure will normally be permanent If an intermittent condition is encountered the cause will likely be a switch contact or a loose connection at a terminal or crimp Solenoid removal requires interrupting the water supply to the valve Damage may result if solenoids are energized for more than ten minutes without a supply of water The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened This will help to avoid twists and kinks in the tubing Make certain that all plumbing connections are sealed and electrical connections tight and isolated Keep away from combustibles WARNING Exercise extreme caution when servicing electrical equipment e Unplug the dispenser when servicing except when electrical tests are specified Follow recommended service procedures Replace all protective shields or safety notices PROBLEM PROBABLE CAUSE REMEDY Product will not dispense 1 No water Water lines and valves to the dis penser must be open 2 No power or incorrect voltage to 1 Check the out
19. dispenser has an attached cordset and requires 2 wire grounded service rated 120 volts ac 15 amp single phase 60 Hz The mating connector must be a NEMA 5 15R The 230 volt CE version requires 2 wire grounded service rated 230V ac single phase 50 Hz The 200 volt or 240 volt versions require 2 wire grounded service rated 200 volts ac or 240 volts ac single phase 50 Hz Refer to the dispenser s data plate for exact voltage requirement Electrical Hook Up CAUTION Improper electrical installation will damage electronic components 1 An electrician must provide electrical service as specified 2 Using a voltmeter check the voltage and color coding of each conductor at the electrical source Connect the dispenser to the power source PLUMBING REQUIREMENTS This dispenser must be connected to a cold water system with operating pressure between 20 and 90 138 and 620 kPa psi from or larger supply line A shut off valve should be installed in the line before the dispenser Install a regulator in the line when pressure is greater than 90 psi 620 kPa to reduce it to 50 psi 345 kPa The water inlet fitting is 74 flare NOTE Bunn O Matic recommends 1 4 copper tubing for installations of less than 25 feet and for more than 25 feet from the water supply line At least 18 inches of an FDA approved flexible beverage tubing such as reinforced braided polyethylene or silicone before the brewer will facilitate movemen
20. io refer to MIX RATIO ADJUSTMENTS CLEANING RECOMMENDED WEEKLY CLEANING This should be done in conjunction with the recommended weekly cleaning of your CDS 2 or CDS 3 machine The CDS Hoppers must be empty before starting 1 Preparea 1 gallon cleaning solution consisting of 1 gallon of hot water and a sanitizing cleaner which contains 3 5 chlorine based sanitizer Mix per manufacturers instructions Remove connectors from each concentrate container and place them directly into the cleaning solution Energize each refill station and allow the cleaning solution to pump through the system into the hoppers The cleaning procedure should remove the color stains from the tubing If not prepare another gallon of cleaning solution and repeat After the cleaning solution has been pumped into the hoppers rinse the cleaning solution container with hot water Fill the cleaning solution container with hot water Energize each refill station and rinsethoroughly The amount of clean hot rinse water should equal the amount of cleaning solution pumped through the system Empty the hoppers of your CDS machine and follow the recommended cleaning instructions NOTE The hoses should be checked monthly for deterioration cracks and possible discoloration from some concentrates Replace the tubing when necessary MIX RATIO ADJUSTMENTS Tto Remove the top access panel Connect the test hose to the WATER OUTPUT to be adjusted Connect the provided hose
21. let for 120 volts the dispenser on two wire 120 volt dispensers A2 Check the outlet for 200 volts or 240 volts ac for two wire 200 volt or 240 volt dispensers A3 Check the outlet for 230 volts on two wire 230 volt dispensers B Check circuit breakers orfuses 3 Signal cable unplugged Signal cable must be plugged in 4 Hopper is full Product must not be touching probes to fill 5 Fuse and fuse holder Refer to Service Fuse and Fuse Holder for test procedures See page 11 7 28791 040501 TROUBLESHOOTING cont PROBLEM Product will not dispense cont Incorrect mix ratio Motor thermal cutout motor stops running PROBABLE CAUSE 6 Main ON OFF switch 7 Probe box LOW OFF HIGH switches 8 Circuit board 9 Vacuum switch 10 Vacuum Supply pump 11 Pump flavor start switches 1 No water 2 Needle valve 3 Solenoids 1 Motor overheat REMEDY Refer to Service Main ON OFF Switch for testing procedure See page 12 Refer to Service Probe system See page 13 Refer to Service Circuit Board for testing procedures See page 10 Refer to Service Vacuum switch for testing procedures See page 21 Refer to Service Vacuum Supply pump for testing procedures See page 19 Referto Service Pump flavor start switches for test procedures See page 14 Water lines and valves to the dis penser must be open Refer to Setup Mix Ratio Adjust ments for adjustment See page 4
22. ls 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 5 If voltage is not present as described refer to the Wiring Diagrams and check the dispenser wiring har ness 5 Check for continuity across the switch terminals with the switch in the ON position Continuity must not be present when the switch is in the OFF position If continuity is present as described reconnect the wires to the switch terminals If continuity is not present as described replace the switch Removal and Replacement 1 Remove the wires from the switch terminals 2 Compress the clips inside the autofill box and gently push the switch through the opening Push the new switch into the opening and spread the clips to hold switch in the autofill box Refer to Fig 7 when reconnecting the wires m BLK from Fuse Holder BLK to Solenoid Water Switch 2 AFPO 2 amp 3 FIG 7 MAIN ON OFF SWITCH TERMINALS 28791 040501 SERVICE cont PROBE SYSTEM FIG 8 PROBE SWITCHES Location The probe switches are located on the rear of each hopper mounted in the probe housing cover Test Procedure Probe System 1 Disconnect the dispenser from the power source 2 With the probe boxes connected to the signal cable remove connector from refill box 3 Place the switch on the probe box in the HIGH position 4 Check resistance across pins as shown in Fig 9 1
23. ould be adjusted to dispense 1 cup of water in 10 seconds NOTE Hoses and tubing should be primed and free of substantial air spaces and or bubbles prior to calibration NEEDLE VALVE 5 28791 040501 OPERATING CONTROLS A MAIN POWER ON OFF The main power ON OFF switch is located on the right of the front panel just above the power cord B REFILL CIRCUIT ON OFF The refill circuit ON OFF switches are located on the right of the front panel just above the main power switch These allow each circuit to operate independently C TEST OPERATE The TEST OPERATE switch is located inside the auto fill box just below the top access cover For setting flow rates and mix ratios for flavors place the TEST OPER ATE switch in the TEST position This allows the op erator to run the water and flavor lines for each circuit depending on the requirements for the flavor recipe D PROBE CONTROL BOX LOW OFF HIGH On models equipped with a dual level probe there is a LOW OFF HIGH switch located at the probe control box on the hopper The OFF position allows the operator to disable the probe for that hopper only THE LOW and HIGH positions allow the operator to select the level of product desired for that hopper 6 28791 040501 TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered If the problem remains after exhausting the troubleshooting steps conta
24. output time NOTE For a typical adjustment the time for flavor output in the center column above is assumed to be 20 seconds A more specific flavor pump output time may be obtained prior to adjustment of the needle valve To do so connect the flavor to be tested to the FLAVOR INPUT and the test hose to the corresponding FLAVOR OUTPUT make no connection to the WATER INPUT With a one cup container under the test hose press the corresponding TEST OUTPUT switch and carefully measure and note the elapsed time from when the product first flows from the test hose to when one half cup of the product has been dispensed This value may then be used in the formula below Following flavor pump output measurement disconnect the flavor line from the FLAVOR INPUT and purge remaining product from the line Formula for setting mix ratio To obtain the time for dispensing 1 cup of water divide the time it takes to dispense one half cup of product by the first number in the mix ratio and then multiply the result by two Example W 2 F X Where W is the time it should take to dispense one cup of water it took F seconds 20 here to dispense 1 2 cup of flavor concentrate we desire a mix ratio X of 4 1 X will be the first number in the mix ratio 4 Therefore W 2 20 4 W 2 5 W 10 seconds 50 if it took 20 seconds to dispense one half cup of flavor concentrate and a mix ratio of 4 to 1 is required the needle valve sh
25. ration improper installation or operation improper maintenance or repair damage or casualty THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY WRITTEN OR ORAL EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE The agents dealers or employees of Bunn are not authorized to make modifications to this warranty or to make additional warranties that are binding on Bunn Accordingly statements by such individuals whether oral or written do not constitute warranties and should not be relied upon The Buyer shall give Bunn prompt notice of any claim to be made under this warranty by telephone at 217 529 6601 or by writing to Post Office Box 3227 Springfield Illinois 62708 3227 If requested by Bunn the Buyer shall ship the defective equipment prepaid to an authorized Bunn service location If Bunn determines in its sole discretion that the equipment does not conform to the warranty Bunn shall repair the equipment with no charge for parts during the warranty period and no charge for labor by a Bunn Authorized Service Representative during the warranty period If Bunn determines that repair is not feasible Bunn shall at its sole option replace the equipment or refund the purchase price for the equipment THE BUYER S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS EQUIPMENT WHETHER DERIVED FROM WARRANTY OR
26. rs Refer to the illustration below when connecting the lines 28791 011500 22 SCHEMATIC WIRING DIAGRAM AFPO 2 L1 BLK MAIN ON OFF SWITCH 1 i BLK en 10 BRN BLK SWIC PUMP SWITCH 2 mm ORN ep SOLENOID SWITCH 2 d PUMP SW ITCH 1 RED BLK pA Cy EE ie BLK 1 qe REDIBLK nT sle e 0 8 J440 4 3 120 VOLT AC 2 WIRE SINGLE PHASE 23 mud mm Dy e ec mmm M M Kee 4 GRN l REFILL ON OFF REFILL ON OFF SWITCH mm VACUUM SWITCH 2 VACUUM SWITCH 1 PROBE CONTROL 1 BRN BLK RED BLK WHI WHI PROBE CONTROL 2 28791 051599 SCHEMATIC WIRING DIAGRAM L1 BLK MAIN ON OFF SWITCH 000002 Ti if AMP WHI RED 120 VOLT AC 2 WIRE SINGLE PHASE 3 WHI BRN BLK 3 WHI RED SW1D DU BRN BLK Meg RED BLK 24 B GRN N REFILL ON OFF SWITCH 3 T WHI RED REFILL ON OFF T SWITCH 2 E n BRN BLK y T 0 P E R REFILL ON OFF E RED BLK 5 Ww H C H VACUUM VACUUM CONTROL CONTROL CONTROL 28791 051599 SCHEMATIC WIRING DIAGRAM AFPOA 2 L1 BLK MAIN ON OFF
27. t to clean the countertop Tubing is supplied by Bunn O Matic part number 00326 0000 Bunn O Matic does not recommend the use of a saddle valve to install the brewer The size and shape of the hole made in the supply line by this type of device may restrict water flow This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International Inc BOCA and the Food Service Sanita tion Manual of the Food and Drug Administration FDA INITIAL SET UP NOTE This refill unit should not be used to initially fill the hopper Running the motor for extended periods will trip the thermal switch The thermal switch will reset but requires up to 30 minutes of cooling time NOTE Hoses and product container connectors are not supplied Fitting clamps and labels are supplied Make hose assemblies as required Refer to P PING DIAGRAM on page 22 1 Assemble hoppers with probe housing assemblies to CDS 2 CDS 3 or modify existing hoppers using template provided 2 Make sure probe housing assembly is pushed down into slots on back of hoppers Install cable assembly to the lower right front of the auto refill box and the probe housing assemblies on the hoppers The connectors on the cable pushes in and cap rotates 1 4 turn to lock into position 4 Run output tubes from auto refill box to the quick disconnects in the hoppers NOTE Make sure numbers on the labels match up Cable 1 with
28. tm 10 Fuse amp Fuse 11 Main ON OFF 12 Probe LOW OFF HIGH Switches 13 Pump Flavor Start Switches 14 Refill ON OFF Switches 15 sr M 16 Solenoid Water Start Switches 17 Test Operate tts 18 Vacuum Supply Pump Assembly 19 Vacuum SWINGS PR 21 22 Wiring Diagrams iege 23 FIG 1 COMPONENT ACCESS 28791 040501 SERVICE CIRCUIT BOARD FIG 2 CIRCUIT BOARD Location The circuit board is located inside the autofill box mounted on the right side of the solenoid mounting bracket under the switch panel Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the ten pin plug on the main wiring harness from the connector on the circuit board 3 Connect the dispenser to the power source With a voltmeter check the voltage across the black wire 3 and the white wire 6 The indication must be a 120 volts ac for two wire 120 volt models b 200 to 240 volts ac for two wire 200 or 240 volt models 10 230 volts ac for two wire 230 volt models 4 Disconnect the dispenser from the power source If voltage is present as described replace the circuit board If
29. to Main Harness 83 2 AFPO 2 amp 3 43 AFPO 3 ONLY FIG 17 SOLENOID TERMINALS 28791 040501 SERVICE cont SOLENOID WATER ON OFF SWITCHES Removal and Replacement 1 Remove the wires from the switch terminals 2 Compress the clips inside the autofill box and gently push the switch through the opening 3 Push the new switch into the opening and spread the clips to hold switch in the autofill box 4 Refer to Fig 19 when reconnecting the wires 1 AFPO 2 amp 3 BLK from Pump Switch 2 P1521 BLK to Pump Switch 1 FIG 18 SOLENOID WATER ON OFF SWITCHES BLU to Test Operate Switch Location BLU to to Solenoid 1 The solenoid water ON OFF switches are located x onthe switch mounting plate inside the autofill box on 2 2 amp 3 the right side Test Procedure 1 Disconnect the dispenser from the power source BLK from Main ON OFF Switch 2 Disconnectthe wires from the switch to be tested to Pump Switch 2 3 Check for continuity across the terminals on the VIO to Test Operate Switch switch when itis held in the on position Continuity VIO to Solenoid 2 must not be present across these terminals in the released position 3 AFPO 3 ONLY If continuity is present as described refer to Fig 19 and reconnect the wires to the switch If continuity is not present as described replace the BLK from Pump Switch 73 switch WHI VIO to Test Operate Switch WHI VIO to Solenoid 3
30. voltage is not present as described refer to the Wiring Diagrams and check main wiring harness Removal and Replacement 1 Remove the four 78 32 keps nuts securing the switch mounting bracket Set aside with the wires attached 2 Remove the circuit board shield and set aside for reassembly 3 Disconnect the ten pin plug from the main wiring harness to the circuit board 4 Remove the six 4 40 screws and spacers secur ing the circuit board to the solenoid mounting bracket Remove circuit board and discard 5 Install new circuit board using 4 40 screws and spacers to secure the circuit board to the solenoid mounting bracket The spacers must be between the solenoid mounting bracket and the circuit board 6 Place circuit board shield over the circuit board 7 Install switch panel assembly and secure with four 8 32 keps nuts 8 Refer to Fig 3 for circuit board ten pin connector P1528 FIG 3 CIRCUIT BOARD CONNECTOR LOCATION 28791 040501 SERVICE FUSE AND FUSE HOLDER FIG 4 FUSE HOLDER Location The fuse holder is located on the lower right front of the autofill box just to the left of the power cord Test Procedure 1 Disconnect the dispenser from the power source 2 Remove cap and fuse from fuse holder 3 Remove fuse from the cap 4 Check for continuity through the fuse If continuity is present reinstall the fuse the fuse is operating properly If continuity is not present repla
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