Installation & Operation Manual - Expert-CM
Contents
1. Refer to Service Liquid Level Control system for testing proce dures See page 20 Refer to Service Relay for testing procedures See page 23 Refer to Service Brew timer for testing procedures See page 14 Refer to Service Limit Thermo stat for testing procedures See page 19 Refer to Service Control Ther mostat for testing procedures See page 17 Refer to Service Tank Heater for testing procedures See page 27 10179 060100 TROUBLESHOOTING cont PROBLEM Decanter warmer is not hot Spitting or unusual steaming from sprayhead Inconsistent beverage level in decanter PROBABLE CAUSE 1 Warmer switches 2 Decanter warmers 1 Control thermostat 2 Lime build up CAUTION Tank and tank compo nents should be delimed regularly depending on local water condi tions Excessive mineral build up on stainless steel surfaces can initiate corrosive reactions result ing in serious leaks 1 How control 2 Improper water pressure Page 10 REMEDY A The decanter warmer switch must be in the upper position for the warmer to operate B Refer to Service On Left or Right switch for testing proce dures See page 22 or 24 Refer to Service Decanter Warm er for testing procedures See page 18 Refer to Service Control Ther mostat for testing procedures See page 17 Inspect the tank assembly for excessive lime deposits Delime as required A Direction of flow ar2. OPERATING amp SERVICE MANUAL BUNN O MATIC CORPORATION POST OFFICE BOX 3227 Um SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 217 529 6644 au 10179 0000J 05 12 1987 BUNN O MATIC CORPORATION BUNN O MATIC COMMERCIAL PRODUCT WARRANTY Bunn O Matic Corp BUNN warrants equipment manufactured by it as follows 1 Airpots thermal carafes decanters GPR servers iced tea coffee dispensers MCP MCA pod brewers thermal servers and Thermofresh servers mechanical and digital 1 year parts and 1 year labor 2 All other equipment 2 years parts and 1 year labor plus added warranties as specified below a Electronic circuit and or control boards parts and labor for 3 years b Compressors on refrigeration equipment 5 years parts and 1 year labor c Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis parts and labor for 4 years or 40 000 pounds of coffee whichever comes first These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the applicable warranty period This warranty does not apply to any equipment component or part that was not manufactured by BUNN or that in BUNN s judgment has been affected by misuse neglect alteration improper installation
3. ished beverage in the decanter CLEANING The use of a damp cloth rinsed in any mild non abrasive liquid detergent is recommended for cleaning all surfaces on Bunn O Matic equipment Check and clean the sprayhead The sprayhead holes must always remain open With the sprayhead removed insert the deliming spring provided all the way into the sprayhead tube When inserted properly no more than two inches of spring should be visible Saw back and forth five or six times Then repeat this step for the airvent tube NOTE In hard water areas this may need to be done daily It will help prevent liming problems in the brewer and takes less than a minute Page 6 10179 060100 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 contact the Bunn O Matic Technical Services Department e elnspection testing and repair of electrical equipment should be performed only by qualified service person nel e e eAll 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 e e ntermittent 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 co
4. 7 Securely install the new solenoid valve to the mounting bracket 8 Attach the mounting bracket to the hood 9 Securely fasten the water lines to and from the solenoid valve 10 Refer to FIG 21 when reconnecting the wires WHI to Right Switch 1 WHI to Liquid Level Control Board FIG 21 SOLENOID TERMINALS 10179 060100 SERVICE cont START SWITCH P2172 80 FIG 22 START SWITCH Location The Start switch is located in front of the hood centered above the brew funnel Test Procedure 1 Disconnectthe brewer from the power source and remove the wires from both terminals of the Start switch 2 Check for continuity across the two terminals on the switch when it is held in the lower position Continuity must not be present across these ter minals in the upper position Page 26 If continuity is present as described reconnect the wires the switch is operating properly It does not matter which terminals the wires are installed on If continuity is not present as described replace the switch Removal and Replacement 1 Remove all wires from the switch terminals 2 Compress the clips inside the hood and gently push the switch through the opening 3 Push the new switch into the opening and spread the clips to hold the switch captive in the hood 4 Refer to the FIG 23 When reconnecting the wires BLU to Timer WHI RED to On Left S
5. To set a batch volume first check that the SET LOCK switch is in the SET position on the circuit board Press and hold the START or BREW switch until three distinct clicks are heard and then release the switch Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory View the level of the liquid being dispensed When the desired level is reached turn the ON OFF switch to OFF The brewer remembers this volume and will continue to brew batches of this size until the volume setting procedure is repeated NOTE When brewing coffee batch volumes will decrease due to absorption by the coffee grounds 3 Setting programming disable feature If it becomes necessary to prevent anyone from changing brew times once programmed you can set the SET LOCK switch to the LOCK position This will prevent any program ming to be done until switch is once again placed in the SET position COFFEE BREWING Insert a BUNNS filter into the funnel Pour the fresh coffee into the filter and level the bed of grounds by gently shaking Slide the funnel into the funnel rails Place the On Left switch in the upper position Press the Start switch When brewing is completed simply discard the grounds and filter NOTE Any attempt to draw hot water from the faucet during a brew cycle will result in a lesser amount of fin
6. BREW TIMER Location The brew timer is located in the hood to the right of the tank Test Procedures 1 Disconnectthe brewer from the power source and remove the top cover 2 With a voltmeter check the voltage across termi nals TL1 and TL2 when the ON OFF switch is in the ON position Connect the brewer to the power source The indication must be 120 volts ac 3 Disconnect the brewer from the power source If voltage is present as described proceed to 4 If voltage is not present as described refer to the Wir ing Diagram and check the brewer wiring harness 4 Disconnect the white blue wire from terminal TL3 and the blue wire from terminal TL5 Check for continuity across the two wires when the start switch is pressed to the START position If continuity is present as described reconnect the wires and proceed to 75 If continuity is not present as described refer to the Wiring Diagram and check the brewer wiring har ness Page 15 5 With a voltmeter check the voltage across termi nals TL1 and TL4 when the ON OFF switch is in the ON position Connect the brewer to the power source The indication must be 0 volts If voltage is as described proceed to 6 If voltage is not as described disconnect the brewer from the power source and replace the timer 6 With a voltmeter check the voltage across ter minals TL1 and TL4 when the ON OFF switch is in the ON position Connect
7. comply with the applicable Plumbing Sanitation Code for your area OPERATING CONTROLS A On Left Switch Placing the switch in the upper position supplies power to the left decanter warmer and enables brewing and refilling of the tank Placing the switch in the lower position cuts power to the left decanter warmer and stops brewing and refilling of the tank Stopping a brew cycle after it has been started will not stop the flow of water into the funnel until the tank syphons down to its proper level NOTE The On Left switch must be in the upper position to initiate and complete a brew cycle or to automatically refill the tank after using the hot water faucet B Start Switch Starts a brew cycle when the On Left switch is in the upper position C Right Switch Placing the switch in the upper position supplies power to the right decanter warmer Placing the switch in the lower position cuts power to the right decanter warmer Page 4 10179 051712 INITIAL SET UP CAUTION The brewer must be unplugged throughout the nitial Set up except when specified in the instruc tions 1 Remove the top lid from the brewer 2 Rotate the control thermostat knob fully counterclockwise to the OFF position and replace the top lid 3 Insert an empty funnel into the funnel rails 4 Place a decanter containing a small amount of water on the left warmer 5 Plug in the brewer and place the On Left switch in the upper position Water will flow
8. early models P1979 75 FIG 2 BREW TIMER Location The brew timer is located in the hood to the right of the tank Test Procedure 1 Disconnect the brewer from the power source and separate the polarized three pin connectors between the timer and brewer wiring harness and rotate the brew timer dial fully counterclockwise 2 With a voltmeter check the voltage across sockets 2 amp 3 white and black wires of the female con nector when the On Left switch is in the upper position Connect the brewer to the power source The indication must be 120 volts ac 3 Disconnect the brewer from the power source If voltage is present as described proceed to 4 If voltage is not present as described referto the Wiring Diagram and check the brewing harness 4 With a voltmeter check the voltage across sockets 1 amp 2 blue and white wires of the female con nector when the On Left switch is in the upper position and the Start switch is pressed to the lower position and held Connect the brewer to the power source The indication must be 120 volts ac until the Start switch is released 5 Disconnect the brewer from the power source If voltage is present as described reconnect the po larized three pin connectors and proceed to 6 If voltage is not present as described refer to the Wiring Diagram and check the brewer wiring harness Page 14 6 Disconnect the in line connectors on the black and white wire
9. or operation improper maintenance or repair non periodic cleaning and descaling equipment failures related to poor water quality damage or casualty In addition the warranty does not apply to replacement of items subject to normal use including but not limited to user replaceable parts such as seals and gaskets This warranty is conditioned on the Buyer 1 giving 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 2 if requested by BUNN shipping the defective equipment prepaid to an authorized BUNN service location and 3 receiving prior authorization from BUNN that the defective equipment is under warranty THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY WRITTEN OR ORAL EX PRESS 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 If BUNN determines in its sole discretion that the equipment does not conform to the warranty BUNN at its exclusive op tion while the equipment is under warranty shall either 1 provide at no charge replacement parts and or
10. present as described reconnect the wires the switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Remove all wires from the switch terminals 2 Compress the clips inside the hood and gently push the switch through the opening Push the new switch into the opening and spread the clips to hold the switch captive in the panel 4 Referto FlG 15 when reconnecting the wires WHI to Right switch BLK to Right switch WHI to Left warmer BLK to Cordset L Cy E X L T WHI RED to Start switch WHI VIO to Left warmer P1987 FIG 15 ON LEFT SWITCH TERMINALS Page 22 10179 060100 SERVICE cont RELAY P2172 80 FIG 16 RELAY Location The relay is located in the right rear corner of the hood Test Procedures 1 Disconnect the brewer from the power source 2 With a voltmeter check the voltage across termi nals A amp B in the lower corners of the relay when the On Left switch is in the upper position and the Start switch is pressed to the lower position and released Connect the brewer to the power source The indication must be 120 volts ac for the approximate setting of the brew timer and then return to zero 3 Disconnect the brewer from the power source If voltage is present as described proceed to 4 If voltage is
11. the brewer to the power source and press the start switch The indication must be 120 volts ac If voltage is present as described the brew timer is operating properly Reset the timer as required to obtain the desired brew volume If voltage is not present as described disconnect the brewer from the power source and replace the timer Removal and Replacement NOTE Do not remove or install wires while timer board is installed Pressure applied to one side may cause damage to the board 1 Removethe two 78 32 nuts securing circuit board to the hood 2 Remove circuit board and spacers as required 3 Remove all wires from the timer 4 Attach all wires to the replacement timer board prior to installation to the component mounting bracket Refer to FIG 5 when reconnecting the wires 5 Install new circuit board with spacers as required to the hood 6 Adjust the timer as described below Timer Setting NOTE Prior to setting or modifying volumes check that the brewer is connected to water supply the tank is properly filled and a funnel and server are in place NOTE All volume settings must be done with the sprayhead installed 10179 121704 SERVICE cont BREW TIMER cont late models 1 Modifying brew volumes To modify a brew vol ume first check that the SET LOCK switch is in the SET position on the circuit board To increase a brew volume place the ON OFF switch in the ON position pre
12. thermostat 2 With a voltmeter check the voltage across the blue wire removed from the limit thermostat and the white wire on the tank heater terminal when the control thermostat is turned ON fully clock wise Connect the brewer to the power source The indication must be 120 volts ac 3 Disconnect the brewer from the power source Page 19 If voltage is present as described reconnect the blue wire and proceed to 74 If voltage is not present as described refer to the Wir ing Diagram and check the brewer wiring harness 4 Remove the black wire from the limit thermo stat 5 With a voltmeter check for voltage across the exposed terminal of the limit thermostat and the white wire on the tank heater terminal when the control thermostat is turned ON full clockwise Connect the brewer to the power source The indication must be 120 volts ac 6 Disconnect the brewer from the power source If voltage is present as described reconnect the black wire the limit thermostat is operating properly If voltage is not present as described replace the limit thermostat Removal and Replacement 1 Remove both wires from the limit thermostat terminals 2 Carefully slide the limit thermostat out from under the retaining clip 3 Carefully slide the new limit thermostat into the retaining clip 4 Referto FlG 11 when reconnecting the wires BLU to Control Thermostat BLK to Tank Heater P1984 60 FI
13. G 11 LIMIT THERMOSTAT TERMINALS 10179 060100 SERVICE cont LIQUID LEVEL CONTROL SYSTEM P2173 80 FIG 12 LIQUID LEVEL PROBE amp CONTROL BOARD Location The liquid level control system is composed of the circuit board in the right front corner of the hood and the probe in the tank lid Test Procedure 1 Disconnect the brewer from the power source and remove the wires from terminals 1 amp 4 of the circuit board 2 With a voltmeter check the voltage across termi nals 2 amp 3 when the On Left switch is in the upper position Connect the brewer to the power source The indication must be 120 volts ac 3 Disconnect the brewer from the power source If voltage is present as described proceed to 74 If voltage is not present as described refer to the Wir ing Diagram and check the brewer wiring harness 4 Reconnect the brown white wire to terminal 1 5 Carefully connect a piece of insulated jumper wire to terminal 4 Keep the other end of this wire away Page 20 from any metal surface of the brewer 6 With a voltmeter check the voltage across termi nals 1 amp 3 when the On Left switch is in the upper position Connect the brewer to the power source The indication must be 120 volts ac after a delay of approximately 5 seconds 7 Touch the end of the jumper wire to the brewer housing The indication must be zero 8 Movethe jumper wire away from the brewer hous ing The indica
14. LUMBING REQUIREMENTS This brewer must be connected to a cold water system with operating pressure between 20 138 and 90 psi 620 kPa from a 1 2 or larger supply line A shut off valve should be installed in the line before the brewer 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 1 4 flare NOTE Bunn O Matic recommends 1 4 copper tubing for installations of less than 25 feet and 3 8 for more than 25 feet from the 1 2 water supply line A tight coil of copper tubing in the water line will facilitate moving the brewer to clean the counter top 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 Plumbing Hook Up 1 Attach the female fitting from the short piece of tubing on the flow control strainer assembly supplied to the water inlet fitting on the right rear side of the brewer 2 Flush the water line and securely attach it to the flare fitting on the flow control strainer assembly 3 Turn on the water supply As directed in the International Plumbing Code of the International Code Council and the Food Code Manual of the Food and Drug Administration FDA this equipment must be installed with adequate backflow pre vention to comply with federal state and local codes For models installed outside the U S A you must
15. d on the rear of the hood to the right of the tank Test Procedure 1 Disconnectthe brewer from the power source and remove the black wire from the control thermo stat 2 With a voltmeter check the voltage across the black wire removed from the control thermostat and the white wire on the tank heater terminal Connect the brewer to the power source The indication must be 120 volts ac 3 Disconnect the brewer from the power source If voltage is present as described reconnect the black wire and proceed to 4 If voltage is not present as described refer to the Wir ing Diagram and check the brewer wiring harness 4 Remove the blue wire from the control thermo stat 5 With a voltmeter check the voltage across the exposed terminal of the control thermostat and the white wire on the tank heater terminal when the control thermostat is turned ON fully clock wise Connect the brewer to the power source The indication must be 120 volts ac Voltage must not be indicated across these terminals when the thermostat is turned OFF fully counterclock wise Page 17 6 Disconnect the brewer from the power source If voltage is present as described reconnect the blue wire the control thermostat is operating properly If voltage is not present as described replace the control thermostat Removal and Replacement 1 Remove both wires from the control thermostat terminals 2 Remove the thermostat bulb by firmly pu
16. e become necessary Refer to Troubleshooting for assistance in determining the cause of any problem COMPONENT ACCESS 24 WARNING Unplug the brewer before the removal of any panel or the replacement of any component p The On Left switch Start switch Right switch solenoid valve brew timer liquid level control compo nents relay control thermostat limit thermostat and tank heater are located in the hood Access is gained by removing the top lid attached with two 74 40 slot ted head screws WARNING Inspection testing and repair of electri cal equipment should be performed only by qualified service personnel The brewer should be unplugged when servicing except when electrical tests are re quired and the test procedure specifically states to plug in the brewer 1956 40 FIG 1 COMPONENT ACCESS CONTENTS Brew TIME 14 Control Thermostat eeeses 17 Decanter 6 cocci tig riot en 18 Limit TRetOSEAL cesse ede trate tiet nee 19 Liquid Level Control System 20 On Left Warmer Switch 22 ben 23 Right Warmer 24 Solenoid Valve 25 manducet neant et hoc nuhi 26 Tank Heater uei 224 ttt does tocorcads 27 Wiring DIOE 20 Page 13 10179 060100 SERVICE cont BREW TIMER
17. emycoffee com Scale Pro Silver Series Single Smart Funnel Smart Hopper SmartWAVE Soft Heat SplashGard The Mark of Quality in Beverage Equipment Worldwide ThermoFresh Titan trifecta Velocity Brew A Partner You Can Count On Air Brew Air Infusion Beverage Bar Creator Beverage Profit Calculator Brew better not bitter BUNNSource Coffee At Its Best Cyclonic Heating System Daypart Digital Brewer Control Nothing Brews Like a BUNN Pouring Profits Signature Series Tea At Its Best The Horizontal Red Line Ultra are either trademarks or registered trademarks of Bunn O Matic Corporation Page 2 10179 030912 INTRODUCTION This equipment will brew a half gallon batch of coffee into an awaiting decanter and dispense hot water on demand for other purposes It has two warmers to keep the beverage at the right temperature The brewer is only for indoor use on a sturdy counter or shelf CONTENTS Warr aniy NN RO REN 2 Introduction and User Notices ene 3 Electrical Plumbing Requirements Operating Controls 4 Initial Setup Brew Volume Adjustments 5 Coffee Brewing Cleaning 6 7 SVICE 18 RR 28 USER NOTICES Carefully read and follow all notices on the equipment and in this manual They were written for your protection All notices on the equipme
18. f the tank lid Disconnect the 1 4 flare fitting on the tank lid inlet fitting Remove the sprayhead and sprayhead nut from the panel on the bottom of the hood Disconnect the airvent tube from the fitting above the sprayhead panel Loosen the eight 78 32 nuts on the tank lid and remove the tank lid Remove the two nuts from the tank heater fit tings Remove the tank heater Install the new tank heater with new sealing wash ers on the underside of the tank lid Securely tighten the nuts to be certain of a water tight seal Reinstall tank lid and secure with eight 78 32 nuts Reinstall the sprayhead tube nut and sprayhead Reinstall the liquid level probe and thermostat into the tank lid Securely fasten the 1 4 flare fitting to the tank lid inlet fitting Refer to FIG 25 when reconnecting the wires BLK to limit thermostat to Cordset P1990 70 FIG 25 TANK HEATER TERMINALS 10179 060100 SCHEMATIC WIRING DIAGRAM VLPF L1 GREEN X x LIMIT THERMOSTAT aP UELK BLU rig WHI RH TANK HEATER WHI WARM HEATER WHI BRN BLK P1 P2 amp P3 ARE PINS OF A POLARIZED THREE PIN CONNECTOR i TL1 TLS TL3 BREW LIQUID 9077 T WHURED K5 BOARD a BRN WHI 7 WHUBLUS SoL WHI PROBE is 120 VOLTSA C 2 WIRE GND SINGLE PHASE Page 28 10179 121704
19. ient quantity of fine or drip grind coffee should be used for proper extraction Bunn O Matic sprayhead 01082 0000 should be used to properly wet the bed of ground coffee in the funnel 10179 060100 TROUBLESHOOTING cont PROBLEM PROBABLE CAUSE Weak beverage cont 4 Funnel loading 5 Water temperature Brewer is making unusual noises 1 Solenoid valve 2 Plumbing lines 3 Water supply Page 12 REMEDY The BUNN paper filter should be centered in the funnel and the bed of ground coffee leveled by gentle shaking Empty a decanter and place it on the left warmer Insert an empty funnel into the funnel rails Place the On left switch in the upper position Press the Start switch and check the water temperature immediately below the sprayhead with a thermometer The reading should not be less than 195 F Adjust the control thermostat slightly clockwise to increase the water temperature The nut on top of the solenoid valve must be tight or it will vibrate during operation Plumbing lines should not be rest ing on the counter top A The brewer must be connected to a cold water line B Water pressure to the brew er must not be higher than 90 psi 620 kPa Install a regulator if necessary to lower the work ing pressure to approximately 50 psi 345kPa 10179 060100 SERVICE This section provides procedures for testing and replacing various major components used in this brewer should servic
20. into the tank after a five second delay and continue until the tank has filled to its capacity This should take approximately seven minutes NOTE The On left switch must be in the upper position to initiate and complete a brew cycle or to automatically refill the tank after using the hot water faucet Place the On left switch in the lower position Unplug the brewer Remove the top lid Rotate the control thermostat knob fully clockwise to the ON position and replace the top lid 0 Plug in the brewer and wait for the water in the tank to heat to the proper temperature Some water will drip from the funnel during this time This is due to expansion and should not occur thereafter 11 Place an empty decanter under the funnel 12 Place the On Left switch in the upper position and press the Start switch Empty the decanter after water has stopped flowing from the funnel 13 Allow the water in the tank to reheat to the proper temperature 14 Press the Start switch Check the water volume in the decanter after water has stopped flowing from the funnel It should be 64 ounces 15 If not unplug the brewer and remove the top lid 16 Adjust the brew timer as required See Adjusting Brew Volumes Replace the top lid plug in the brewer start and measure another brew cycle 17 Repeat steps 13 16 until 64 oz water volume is achieved ADJUSTING BREW VOLUMES CAUTION Disconnect the power source from the brewer pri
21. labor during the applicable parts and labor warranty periods specified above to repair the defective components provided that this repair is done by a BUNN Authorized Service Representative or 2 shall 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 OTHERWISE SHALL BE LIMITED AT BUNN S SOLE OPTION AS SPECIFIED HEREIN TO REPAIR 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 392 AutoPOD AXIOM BrewLOGIC BrewMETER Brew Better Not Bitter BrewWISE BrewWIZARD BUNN Espress BUNN Family Gourmet BUNN Gourmet BUNN Pour O Matic BUNN BUNN with the stylized red line BUNNlink Bunn OMatic Bunn O Matic BUNNserve BUNNSERVE with the stylized wrench design Cool Froth DBC Dr Brew stylized Dr design Dual Easy Pour EasyClear EasyGard FlavorGard Gourmet Ice Gourmet Juice High Intensity iMIX Infusion Series In tellisteam My Caf Phase Brew PowerLogic Quality Beverage Equipment Worldwide Respect Earth Respect Earth with the stylized leaf and coffee cherry design Safety Fresh sav
22. lling up on the capillary tube at the tank lid This will disengage the grommet from the tank lid 3 Remove the two 78 32 screws holding the control thermostat to the brewer housing 4 Slidethe grommetto the red mark on the capillary tube 5 Insert the bulb through the hole in the tank lid and press the grommet firmly and evenly so the groove in the grommet fits into the tank lid 6 Carefully bend the capillary tube so the tube and bulb inside the tank are in a vertical position NOTE Make sure the capillary tube is away from any electrical termination and is not kinked 7 Fasten the new control thermostat to the brewer housing 8 Referto FIG 7 when reconnecting the wires 9 Readjust the control thermostat dial as required BLU to Limit Thermo stat BLK to Cordset P1981 FIG 7 CONTROL THERMOSTAT TERMINALS 10179 060100 SERVICE cont DECANTER WARMERS P1956 40 FIG 8 DECANTER WARMERS Location The decanter warmers are located in the base of the brewer Test Procedure 1 Disconnect the brewer from the power source and remove the three 74 40 screws attaching the suspect warmer 2 Bring the warmer assembly out the top of the base 3 Disconnect both wires from the warmer Make sure that the wire ends do not touch any metal surface of the brewer 4 With a voltmeter check the voltage across the two wires removed from the warmer when the appropriate warmer switch on left or
23. nnection at a terminal or crimp e eSolenoid 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 e use of two wrenches is recommended whenever plumbing fittings are tightened or loosened This will help to avoid twists and kinks in the tubing e e e Vlake certain that all plumbing connections are sealed and electrical connections tight and isolated e e eThis brewer is heated at all times unless unplugged Keep away from combustibles WARNING e Exercise extreme caution when servicing electrical equipment Unplug the brewer when servicing except when electrical tests are specified Follow recommended service procedures Replace all protective shields or safety notices Page 1 10179 060100 TROUBLESHOOTING cont PROBLEM Equipment will not operate Brew cycle will not start Automatic refill will not operate after drawing hot water PROBABLE CAUSE 1 No power or incorrect voltage 1 No water 2 Water strainer Flow Control 3 On Left switch 4 Start switch 5 Brew timer 6 Relay T Solenoid valve 1 On Left switch Page 8 REMEDY A Plug in brewer B Check wall outlet for 120V ac C Check circuit breaker fuse Check plumbing and shut off valves A Direction of flow arrow must be pointing towards brewer B Remove the strainer Flow con trol and check for obs
24. not present as described refer to the Wir ing Diagram and check the brewer wiring harness 4 Remove the black and white wires from terminals A amp B 5 Checkfor continuity across terminals A amp B of the relay If continuity is present as described reconnect the black and white wires and proceed to 76 If continuity is not present as described replace the relay 6 Remove the brown white white red and white blue wires from terminals 2 5 amp 7 of the relay Page 23 7 Check for continuity across terminals 2 amp 7 when the On Left switch is in the upper position only until the Start switch is pressed to the lower position and released Connect the brewer to the power source Continuity must return across these terminals after the approximate setting of the brew timer 8 Disconnect the brewer from the power source 9 Check for continuity across terminals 5 amp 7 when the On Left switch is in the upper position and the Start switch is pressed to the lower position and released Connect the brewer to the power source Continuity must be present across these terminals for the approximate setting of the brew timer 10 Unplug the brewer If continuity is present as described reconnect the wires the relay is operating properly If continuity is not present as described replace the relay Removal and Replacement 1 Remove all wires from the relay terminals 2 Remove the two 78 32 nuts holding the
25. nt should be kept in good condition Replace any unreadable or damaged labels 00656 0001 00658 0000 As directed in the International Plumbing Code of the International Code Council and the Food Code DISCARD DECANTER S A you must comply with the applicable Plumb ing Sanitation Code for your area SCRATCHED BOILED DRY HEATED WHEN EMPTY USED ON HIGH FLAME OR EXPOSED ELECTRIC ELEMENTS READ THE ENTIRE OPERATING MANUAL 8 0 BEFORE USING THIS PRODUCT FAILURE TO COMPLY RISKS INJURY Fill water tank before turning on thermostat or connecting appliance to power source 700882 0000 Use only on a properly protected s circuit capable of the rated load Electrically ground the chassis Follow national local electrical codes Do not use near combustibles FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE FIRE OR SHOCK HAZARD HOT WATER READ THE ENTIRE OPERATING MANUAL BEFORE BUYING OR USING THIS PRODUCT Do Not Use During Brew Cycle THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE 00831 0000F 3 98 1998 BUNI O MATIC CORPORATION 12364 0000 WARMERS AND SURFACES ARE HOT 10179 051712 Page 3 ELECTRICAL REQUIREMENTS CAUTION The brewer must be disconnected from the power source until specified in Initial Set Up The brewer has an attached cordset and requires 2 wire grounded service rated 120 volts ac 15 amp single phase 60 Hz P
26. oceed to 4 If voltage is not present as described refer to the Wir ing Diagram and check the brewer wiring harness 4 Check for continuity across the solenoid valve coil If continuity is present as described reconnect the white and white blue wires and proceed to 5 If continuity is not present as described replace the solenoid valve Page 25 5 Check the solenoid valve for coil action Connect the brewer to the power source place the On Left switch in the upper position press and release the Start switch Listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts and after the approximate setting on the brew timer dial repels the plunger 6 Disconnect the brewer from the power source If the sound is heard as described and water will not pass through the solenoid valve there may be a block age in the water line before or after 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 replace the solenoid valve Removal and Replacement 1 Remove all wires from the solenoid valve coil 2 Turn off the water supply to the brewer 3 Disconnect the water lines to and from the sole noid valve 4 Remove the two 78 32 nuts holding the solenoid valve mounting bracket to the hood 5 Lift out the solenoid valve 6 Remove the solenoid valve from the mounting bracket
27. or to the removal of any panel for the replacement or adjustment of any component NOTE Prior to setting or modifying batch sizes check that the brewer is connected to water supply the tank is properly filled and a funnel and server are in place 1 Modifying batch sizes To modify a batch volume first check that the SET LOCK switch is in the SET posi tion on the circuit board To increase a batch size Press and hold the START or BREW switch until three clicks are heard Release the switch Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory and press it again one or more times Each time the switch is pressed two seconds are added to the brew time period Allow the brew cycle to finish in order to verify that the desired volume has been achieved To decrease a batch size Press and release the START or BREW switch once for every two second interval to be removed from the total brew time period then immediately press and hold down the START or BREW switch until three clicks are heard Release the switch Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory Allow the brew cycle to finish in order to verify that the desired volume has been achieved Page 5 10179 060100 ADJUSTING BREW VOLUMES cont 2 Setting batch sizes
28. quid level control board terminals 2 Removethe two 78 32 slotted head screws hold ing the circuit board to the brewer hood 3 Install the new circuit board to the hood making sure that the two lock washers are in place below the board and above the spacers 4 Refer to FIG 13 when reconnecting the wires BRN WHI to Relay Term 2 WHI RED to Start Switch WHI RED to Relay Term 5 WHI to Timer WHI to Solenoid PNK to Probe P1985 70 FIG 13 LIQUID LEVEL CONTROL BOARD TERMINALS Page 21 10179 121704 SERVICE cont ON LEFT SWITCH P2172 80 FIG 14 ON LEFT SWITCH Location The On Left switch is located in the front of the hood above and to the left of the brew funnel Test Procedure 1 3 Disconnect the brewer from the power source and remove the wires from all three terminals of the On Left switch With a voltmeter check the voltage across the black and white wires Connect the brewer to the power source The indication must be 120 volts ac Disconnect the brewer from the power source If voltage is present as described proceed to 4 If voltage is not present as described refer to the Wir ing Diagram and check the brewer wiring harness 4 Check for continuity across the two terminals on the left side of the switch when it is in the upper position Continuity must not be present across these terminals in the lower position If continuity is
29. relay mounting bracket to the hood 3 Remove the relay from the mounting bracket 4 Securely install the new relay to the mounting bracket Install the relay mounting bracket to the hood 6 Refer to FIG 17 when reconnecting the wires n BRN WHI to Liquid Level Board J1 Ca US BLK to Timer TL3 WHI BLU to Solenoid WHI GRN to Timer TL4 WHI RED toLiquid Level Board J2 WHI RED to Timer TL1 P1988 70 FIG 17 RELAY TERMINALS 10179 121704 SERVICE cont RIGHT SWITCH P2172 80 FIG 18 RIGHT SWITCH Location The Right switch is located in the front of the hood above and to the right of the brew funnel Test Procedure 1 Disconnectthe brewer from the power source and remove the wires from all three terminals of the Right switch 2 With a voltmeter check the voltage across the black and white wires Connect the brewer to the power source The indication must be 120 volts ac 3 Disconnect the brewer from the power source If voltage is present as described proceed to 4 If voltage is not present as described referto the Wir ing Diagram and check the brewer wiring harness 4 Check for continuity across the two terminals on the left side of the switch when it is in the upper position Continuity must not be present across these terminals in the lower position Page 24 If continuity is present as describe reconnect the wires the s
30. right is in the upper position The voltage must be 120 volts ac Page 18 5 Connect the crewer to the power source If voltage is present as described proceed to 6 If voltage is not present as described refer to the Wir ing Diagram and check the brewer wiring harness 6 Disconnect the brewer from the power source 7 Check for continuity across the two terminals on the warmer If continuity is present as described reconnect the wires to the terminals the warmer is operating prop erly If continuity is not present as described replace the warmer Removal and Replacement 1 Remove the three 74 40 slotted head screws holding the warmer to the brewer base 2 Bring the warmer out the top of the base 3 Disconnect both wires from the warmer 4 Referto FIG 9 when reconnecting the wires and orienting the warmers 5 Placethe warmer into the base and securely attach it using the three 24 40 screws Left Warmer WHI VIO to On Left Switch WHI to Right Warmer WHI to Cordset Right Warmer BRN BLK to Right Switch WHI to On Left Switch WHI to Left Warmer P1982 FIG 9 WARMER ELEMENT TERMINALS 10179 060100 SERVICE cont LIMIT THERMOSTAT P1983 40 FIG 10 LIMIT THERMOSTAT Location The limit thermostat is located on the tank lid between the tank heater terminals Test Procedure 1 Disconnectthe brewer from the power source and remove the blue wire from the limit
31. row must be pointing towards the brewer B Remove the control and check for obstructions Clear or re place Check the operating water pres sure to the brewer It must be between 20 138 and 90 psi 620 kPa 10179 060100 TROUBLESHOOTING cont PROBLEM Inconsistent beverage level in decanter cont Consistently high or low beverage level in decanter Dripping from sprayhead Beverage overflows decanter Weak beverage PROBABLE CAUSE 3 Syphon System 1 Brew timer adjustment 1 Syphon System 2 Solenoid valve 1 Beverage left in decanter 2 Incorrect decanter size 1 Type of paper filters 2 Coffee 3 Sprayhead Page 11 REMEDY Water should flow freely from the sprayhead for approximately twenty seconds after the brew solenoid has shut off and then stop flowing abruptly The brewer must be level from side to side to syphon properly Adjust the brew timer as required to achieve the recommended 64 0z for each brew cycle Water should flow freely from the sprayhead for approximately twenty seconds after the brew solenoid has shut off and then stop flowing abruptly The brewer must be level from side to side to syphon properly Refer to Service Solenoid valve for testing procedures See page 25 The brew cycle should be started only with an empty decanter under the funnel Use only 64 oz decanters BUNN paper filters should be used for proper extraction A suffic
32. s from the timer to the wiring har ness 7 With a voltmeter check the voltage across the black and white wires when the On Left switch is in the upper position and the Start switch is pressed to the lower position and released Connect the brewer to the power source The indication must be 120 volts ac for approximately 20 seconds and then return to its previous indication 8 Disconnect the brewer from the power source If voltage is present as described the brew timer is operating properly Reset the timer dial as required to obtain the desired brew volume If voltage is not present as described replace the brew timer Removal and Replacement 1 Separate all connectors between the brewer wiring harness and the timer 2 Remove the two 78 32 nuts holding the timer to the inside of the hood 3 Install the new timer circuit board as described in Late Model Timer section on the following pages 4 Referto FlG 5 when reconnecting the wires 5 Install the Timer Setting decal provided with the replacement timer kit on the bottom of the top COVer 6 Adjustthe timer as required Refer to Late Model Timer section on the following pages WHI to Relay Coil BLK to Relay Coil P1 BLU BLK to Start Switch P2 WHI to Liquid Level Board P3 BLK to Relay OLD STYLE FIG 3 BREW TIMER WIRING P1980 80 10179 060100 SERVICE cont BREW TIMER cont late models P2172 80 FIG 4
33. ss and hold the START switch until three clicks are heard Release the switch and press it again one or more times Failure to re lease the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory Each time the switch is pressed two seconds are added to the brew time period Allow the brew cycle to finish in order to verify that the desired volume has been achieved To decrease a brew volume place the ON OFF switch in the ON position press and release the START switch once for every two second interval to be removed from the total brew time period then immediately press and hold down the START switch until three clicks are heard Relase the switch Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory Allow the brew cycle to finish in order to verify that the desired volume has been achieved 2 Setting brew volumes To set a brew volume first check that the SET LOCK switch is in the SET position on the circuit board Place the ON OFF switch in the ON position press and hold the START switch until three distinct clicks are heard and then release the switch Failure to release theh switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory View the level of
34. the liquid being dispensed When the desired level is reached turn the ON OFF switch to OFF NOTE Several ounces of water will continue to sy Page 16 phon from the tank after turning the switch OFF The brewer remembers this volume and will continue to brew batches of this size until the volume setting procedure is repeated NOTE When brewing coffee volume will decrease due to absorption by the coffee grounds Setting programming disable feature If it be comes necessary to prevent anyone from changing brew time once programmed you can set the SET LOCK switch to the LOCK position This will prevent any further programming until switch is once again put into the SET position Q Q T4 B EE T y TA SET 2 Eo Q Q BLU wire from TL5 to Start Switch WHI GRN wire from TL4 to A on Relay Coil BLK wire from TL3 to B on Relay Coil WHI wire from TL2 to J3 Liquid Level Board WHI RED wire from TL1 to J2 Liquid Level Board P2037 FIG 5 DIGITAL TIMER WIRING 10179 121704 SERVICE cont CONTROL THERMOSTAT P2172 80 FIG 6 CONTROL THERMOSTAT Location The control thermostat is locate
35. tion must again be 120 volts ac after a delay of approximately 5 seconds 9 Disconnect the brewer from the power source and remove the jumper wire from terminal 4 If voltage is present as described the liquid level con trol board is operating properly proceed to 10 If voltage is not present as described replace the liquid level control board 10 Reconnect the pink wire to terminal 4 11 Gently pull the probe out of the tank lid and inspect for corrosion Replace it if necessary Place the probe so that neither end is in contact with any metal surface of the brewer With a voltmeter check the voltage across termi nals 1 amp 3 when the On Left switch is in the upper position Connect the brewer to the power source The indication must be 120 volts ac after a delay of approximately 5 seconds 14 Touch the probe s flat end to the brewer housing The indication must be zero 15 Move the probe s flat end away from the brewer housing The indication should again be 120 volts ac after a delay of approximately 5 seconds 16 Disconnect the brewer from the power source 1 n2 1 If voltage is present as described reinstall the probe the liquid level control system is operating properly If voltage is not present as described check the pink probe wire and or replace the probe 10179 121704 SERVICE cont LIQUID LEVEL CONTROL SYSTEM cont Removal and Replacement 1 Remove all wires from the li
36. tructions Clear or replace Refer to Service On Left switch for testing procedures See page 22 Refer to Service Start switch for testing procedures See page 26 Refer to Service Brew timer for testing procedures See page 16 Refer to Service Relay for testing procedures See page 23 Refer to Service Solenoid valve for testing procedures See page 25 A The On Left switch must be in the upper position for the au tomatic refill to operate B Refer to Service On Left switch for testing procedures See page 22 10179 060100 TROUBLESHOOTING cont PROBLEM Automatic refill will not operate after drawing hot water cont Water flows into tank continuously On left switch OFF Water flows into tank continuously On left switch ON Water is not hot PROBABLE CAUSE 2 Liquid level control system 3 Relay 4 Solenoid valve 1 Solenoid valve 1 Liquid level control system 2 Relay 3 Brew timer 1 Limit thermostat CAUTION Do not eliminate or bypass limit thermostat Use only replacement part 29329 1000 2 Control thermostat 3 Tank heater Page 9 REMEDY Refer to Service Liquid Level Control system for testing proce dures See page 20 Refer to Service Relay for testing procedures See Page 23 Refer to Service Solenoid valve for testing procedures See page 25 Refer to Service Solenoid valve for testing procedures See page 25
37. witch HI RED to Liquid Level Control Board P1987 FIG 23 START SWITCH TERMINAL 10179 060100 SERVICE cont TANK HEATER P1983 40 FIG 24 TANK HEATER Location The tank heater is located on the tank lid Test Procedure 1 2 3 Disconnect the brewer from the power source and remove both wires from the tank heater With a voltmeter check the voltage across the black and white wires removed from the tank heater when the control thermostat is turned ON fully clockwise Connect the brewer to the power source The indication must be 120 volts ac Disconnect the brewer from the power source If voltage is present as described proceed to 4 If voltage is not present as described refer to the Wir ing Diagram and check the brewer wiring harness 4 Check for continuity across the terminals of the tank heater If continuity is present as described reconnect the wires the tank heater is operating properly If continuity is not present as described replace the tank heater NOTE If the tank heater remains unable to heat remove and inspect the heater for cracks in the sheath Removal and Replacement b 15 Page 27 Remove the white wire from the tank heater ter minal and the blue wire from the limit thermostat terminals Gently pull the liquid level probe and thermostat tube with grommet out o
38. witch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Remove all wires from the switch terminals 2 Compress the clips inside the hood and gently push the switch through the opening Push the new switch into the opening and spread the clips to hold the switch captive in the panel 4 Referto FlG 19 when reconnecting the wires WHI Tank Keep Warm Heater Lead WHI to On Left Switch WHI to Solenoid WHI Tank Keep Warm Heater Lead H BLK to On Left Switch BRN BLK to Right Decant er Warmer FIG 19 RIGHT SWITCH TERMINALS 10179 060100 SERVICE cont SOLENOID VALVE P2173 80 FIG 20 SOLENOID VALVE Location The solenoid valve is located in the left rear corner of the hood Test Procedures 1 Disconnectthe brewer from the power source and remove both wires from the solenoid valve coil terminals 2 With a voltmeter check the voltage across the white and white blue wires when the On Left switch is in the upper position and the Start switch is pressed to the lower position and released Connect the brewer to the power source The indication must be 120 volts ac for the approximate setting on the brew timer dial and then return to zero 3 Disconnect the brewer from the power source If voltage is present as described pr
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