OL & RL - Expert-CM
Contents
1. 7 a 7 Troubleshooting ocasion irn tetti nbl 8 Ur T TER 12 Wiring 1 5 26 INTRODUCTION This equipment will brew a half gallon batch of coffee into an awaiting decanter at the press of a button The OL has two and the RL has five warmers to keep the beverage at the right temperature on the RL one of which is capable of heating water to boiling The brewer is only for indoor use on a sturdy counter or shelf 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 equipment should be kept in good condition Replace any unreadable or damaged labels Fill water tank before turning on thermostat or connecting appliance to power source Use only on a properly protected circuit capable of the rated load Electrically ground the chassis Follow national local electrical codes DISCARD DECANTER IF CRACKED SCRATCHED BOILED DRY HEATED WHEN EMPTY USED ON HIGH FLAME FUNNEL CONTENTS OR EXPOSED ELECTRIC ARE HOT ELEMENTS Do not use near combustibles FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE FIRE OR SHOCK HAZARD READ THE ENTIRE OPERATING MANUAL BEFORE BUYING OR USING THIS PRODUCT READ THE ENTIRE OPERATING MANUAL BEFORE USING THIS PRODU2. 15 RL On Off Brew Station s 15 RL Left Rear Left Front Right Rear amp Right Front 2 2202 16 Start WIRE TREE RE 17 Indicator 18 Limit TCT OGL 19 Solenoid Valve 20 nc Aor 21 Tank Heater ioter tears he users is 22 Over Flow Safety Switch 23 Master ON OFF Switch 24 Wiring Schematics 25 FIG 1 ACCESS PANELS Page 13 32430 010308 SERVICE cont Control Thermostat FIG 2 CONTROL THERMOSTAT Location The control thermostat is located under the top cover or top warmer housing FIG 2 To test the control thermostat access will also be needed to the tank heater located in the bottom of the tank assembly Test Procedure 1 Disconnect the brewer from the power source 2 Check the voltage across the blue wire on the control thermostat and the white or red wire on the tank heater with a voltmeter Connect the M the power source The indication must 6 120 volts ac for two wire 120 volt models b 200 or 240 volts ac for two wire 200 volt or 240 volt models and three wire 120 240 volt models C 100 volts ac for two wire 100 volt models 3 Disconnect the brewer from the power source If voltage is present as described proceed to 4
3. LEVEL SW SAFETY SW RED P1 P2 amp P3 ARE PINS OF A OPTIONAL LOW WATER PRESSURE VALVE POLARIZED THREE PIN ele CONNECTOR BLK BR RECT j 1 LEFT REAR WARMER I I LEFT FRONT WARMER BLK n 7 RIGHT FRONT WARMER 7 ON ON RIGHT REAR WARMER 200 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ Page 32 32430 121699
4. OL amp RL S N 100006929 amp up INSTALLATION amp OPERATING GUIDE BUNN O MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 FAX 217 529 6644 www bunn com To ensure you have the latest revision of the Operating Manual or to view the Illustrated Parts Catalog Programming Manual or Service Manual please visit the Bunn O Matic website at www bunn com This is absolutely FREE and the quickest way to obtain the latest catalog and manual updates For Technical Service contact Bunn O Matic Corporation at 1 800 286 6070 32430 0000D 05 12 1999 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 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
5. If voltage is not present as described refer to the Wir ing Diagrams and check the brewer wiring harness 4 Check the voltage across the black wire terminal of the control thermostat and the white or red wire on the tank heater with a voltmeter when the control thermostat is turned ON fully clockwise Connect the brewer to the power Page 14 source The indication must be as described in step 2 Voltage must not be indicated across these terminals when the thermostat is turned OFF fully counterclockwise 5 Disconnect the brewer from the power source If voltage is present as described the control thermo stat is operating properly If voltage is not present as described replace the control thermostat Removal and Replacement 1 Remove the top cover or top warmer housing from the brewer to gain access 2 Remove both wires from the control thermostat terminals 3 Remove the thermostat bulb by firmly pulling up on the capillary tube at the tank lid This will disengage the grommet from the tank lid 4 Remove the two 78 32 screws holding the control thermostat to the bracket 5 Fasten the new control thermostat to the compo nent bracket NOTE Make sure that the capillary tube is away from any electrical termination and is not kinked 6 Slidethe grommetto the red mark on the capillary tube 7 Insert the bulb through the hole in the tank lid and press the grommet firmly and evenly so that the g
6. 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 of the level float switch repels the plunger 5 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 Disconnect the brewer from the power source Turn off the water supply to the brewer Remove the top cover or top warmer housing to gain access Disconnect all wires from the solenoid valve Disconnect the water lines to and from the sole noid valve Remove the two 78 32 screws which hold the solenoid valve and mounting bracket to the component bracket Lift out the solenoid valve and bracket Remove the bracket from the solenoid valve and save to mount the new valve 8 Securely install the new solenoid valve to the mounting bracket with two 10 32 screws Check the direction of flow arrow on the valve It must be pointing toward the tank inlet tube 9 Securely attach the valve and bracket to the com ponent bracket using the two 78 32 screws 10 Securely fasten the water lines to and from the solenoid v
7. volume removing washers decreases it Replace the top panel connect the brewer to the power source start and measure another brew cycle Repeat steps 13 16 until 64 oz water volume is achieved 32430 051512 OPERATING CONTROLS A On Off Brew Station Warmer Switch Placing the switch in the upper position supplies power to the brew station warmer and enables brewing Placing the switch in the lower position cuts power to the brew station warmer and stops brewing Stopping a brew a it has been started will not stop the flow of water into the funnel until the tank syphons down to its proper level The On Off brew station warmer switch must be the upper position to initiate and complete a brew cycle B On Off Brew Station Warmer Indicator Lamp Glows whenever the On Off brew station warmer switch is in the upper position showing that the warmer is on and that the automatic brew cycle can be started C Start Switch Starts a brew cycle when the On Off brew station warmer switch is in the upper position MODEL OL D Upper Warmer Switch Placing the switch in the upper position supplies power to the upper warmer Placing the switch in the lower position cuts power to the upper warmer E Upper Warmer Indicator Lamp Glows whenever the upper warmer switch is in the upper position showing that the warmer is on F Left Rear Warmer Rotary Switch Rotating the knob to the ON position supplies power to the left rea
8. If voltage is present as described proceed to 3 If voltage is not present as described refer to the Wiring Diagrams and check the brewer wiring harness 3 Check the voltage across terminal 1 and the white or red wire on the terminal block with a voltmeter when the switch is in the position Connect the brewer to the power source The indication must be as described in step 1 Voltage must not be present across these terminals in the OFF positions Page 17 4 Disconnect the brewer from the power source If voltage is present as described the switch is operat ing properly If voltage is not present as described replace the switch Removal and Replacement 1 Remove the knob from the switch 2 Loosenthe 5 8 nut on the switch shaft and push the switch through the opening 3 Remove the wires from the switch terminals 4 Refer to FIG 11 when reconnecting the wires 5 Securely mount the new switch onto the housing and reinstall the knob BLK L1 see below BLK 1 see below 1 FIG 11 WARMER SWITCH WIRING MODEL RL Left Rear BLK1 to Warmer BLKL1 to Left Front Warmer Switch RL Left Front BLK1 to Warmer BLK L1 to Left Rear Warmer Switch to Brew Station Warmer Switch RL Right Front BLK1 10 Warmer BLKL1 to Terminal Block to Brew Station Warmer Switch to Right Rear Warmer Switch RL Right Rear BLK1 to Warm
9. POLARIZED THREE PIN CONNECTOR n I BREW STATION WARMER BREW SAFETY SW LEVEL zu P1 P2 amp P3 ARE PINS OF A POLARIZED THREE PIN OPTIONAL LOW WATER PRESSURE VALVE CONNECTOR DE VIO 500 BLK BR RECT WHINIO 200 VOLTS AC 2 WIRE GND SINGLE PHASE 60 HZ Page 29 32430 121699 MAIN ON OFF SWITCH Late Models only SW amp LIMIT THERMOSTAT TANK HEATER P1 P2 amp P3 ARE PINS OF A POLARIZED THREE PIN CONNECTOR RIGHT REAR WARMER OFF 120 240 VOLTS AC 3 WIRE SINGLE PHASE 60 HZ Page 30 32430 010308 SCHEMATIC WIRING DIAGRAM RLA L1 L2 GRN YEL SW amp THERMOSTAT THERMOSTA i BLK n VIO P1 P2 amp P3 ARE PINS OF H A POLARIZED THREE PIN BR RECT WHI VIO CONNECTOR KARRARANNAN LEFT REAR WARMER LI LI 2 0 FRONT WARMER RIGHT FRONT WARMER RED 1 1 RIGHT REAR WARMER 1 1 220 240 VOLTS AC 2 WIRE SINGLE PHASE Page 31 32430 121699 SCHEMATIC WIRING DIAGRAM RL35B L1 READY INDICATOR Si L2 i i BLK 5 E LIMIT SW amp THERMOSTAT 7 THERMOSTAT ee B i TANK HEATER BLK e 1 BLU 7 BLK 1 7 RED x DR 1
10. WHI RED to Relay P2 to Brew Station Warmer RL BLK to On Off Brew Station Warmer Switch WHI RED to Right Front Warmer to Left Front Warmer 32430 121699 SERVICE cont Limit Thermostat FIG 18 LIMIT THERMOSTAT Location The limit thermostat is located on the back of the tank assembly FIG 18 Test Procedure 1 Disconnect the brewer from the power source 2 Check voltage across the black wire from the limit thermostat and the white or red wire on the tank heater terminal Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models b 200 or 240 volts ac for two wire 200 volt or 240 volt models and three wire 120 240 volt models C 100 volts ac for two wire 100 volt models 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 Diagrams and check the brewer wiring harness Page 20 4 Check for continuity across the limit thermostat terminals If continuity is present as described the limit thermo stat is operating properly If continuity 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 Re
11. all plumbing connections are sealed and electrical connections tight and isolated e This brewer is heated at all times unless disconnected from the power source Keep away from combustibles WARNING e Exercise extreme caution when servicing electrical equipment e Disconnect the brewer from the power source when servicing except when electrical tests are specified e Follow recommended service procedures e Replace all protective shields or safety notices Problem Probable Cause Remedy Equipment will not operate 1 No power or incorrect voltage A Connect the brewer to the power source B Check the terminal block for the proper voltages C Check circuit breaker fuse Brew cycle will not start 1 No water Check plumbing and shut off valves 2 Water Strainer A Direction of flow arrow must be pointing towards brewer B Remove the strainer and check for obstructions Clear or replace 3 Water Level Switch and Overflow Refer to Service Water Level Switch Safety Switch and Overflow Safety Switch for test ing procedures See page 23 Page 9 32430 121699 TROUBLESHOOTING cont Problem Brew cycle will not start cont Water flows into fill basin continu ously On Off brew station warmer switch OFF Water flows into fill basin continu ously On Off brew station warmer switch ON Water is not hot Decanter warmer is not hot Probable Cause 4 On Off Brew Station Warmer Switch 5 Star
12. 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 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 8 32430 121699 TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encoun tered If the problem remains after exhausting the troubleshooting steps contact the Bunn O Matic Technical Service Department e Inspection testing and repair of electrical equipment should be performed only by qualified service personnel e All electric components have 120 volt ac voltage on their terminals Shorting of terminals or the application of external voltages may result in equipment failure e Intermittent operation of electronic equipment is unlikely Component failure will normally be permanent If an inter mittent condition is encountered the cause will likely be a switch contact or a loose connection at a terminal or crimp e 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 e 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 e certain that
13. third brew cycle During this third brew cycle the tank will fill to its capacity and the excess will flow from the sprayhead out of the funnel and into the decanter NOTE The On Off brew station warmer switch must be in the upper position to initiate and complete a brew cycle o k Pom 13 14 15 Place the On Off brew station warmer switch in the lower position Disconnect the brewer from the power source Remove the top panel Rotate the control thermostat knob fully clock wise to the ON position and replace the panel Connect the brewer to the power source and wait approximately twenty minutes for the water in the tank to heat to the PEE some water will drip from the funnel during this time this is due to expansion and should not occur thereafter Place an empty decanter under the funnel Place the On Off brew station warmer switch in the upper position and momentarily press the start switch Empty the decanter after water has stopped flowing from the funnel Allow the water in the tank to reheat to the proper temperature Place an empty decanter on the warmer and press the start switch Check the water volume the decanter after water has stopped flowing from the funnel It should be 64 ounces If not disconnect the brewer from the power source and remove the top panel 16 1 Add or remove washers to the float on the level switch as required Adding washers increases the
14. wire terminals to their respec tive plugs in the main harness and the jumper wire at the solenoid valve POM 32430 121699 SERVICE cont Tank Heater FIG 23 TANK HEATER Location The tank heater is located in the bottom of the tank assembly FIG 23 Test Procedure 1 Check the voltage across the black and white red wires on the tank heater with a voltmeter when the control thermostat is turned ON fully clockwise Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models b 200 or 240 volts ac for two wire 200 volt or 240 volt models and three wire 120 240 volt models 100 volts ac for two wire 100 volt models 2 Disconnect the brewer from the power source If voltage is present as described proceed to 3 If voltage is not present as described refer to the Wir ing Diagrams and check the brewer wiring harness 3 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 the tank heater remains unable to heat remove and inspect the heater for cracks in the sheath Removal and Replacement Cor 10 11 12 13 14 15 16 Page 23 Disconnect the brewer from the power source Remove the top cover or to
15. 35 proceed as follows 1 Remove the rear panel and bottom pan Run the long piece of tubing from the strainer supplied under the brewer and attach it to the water inlet fitting on the bottom bracket Reinstall the bot tom pan and rear panel 2 Flush the water line and securely attach it to the 1 4 flare fitting on the strainer 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 comply with the applicable Plumbing Sanitation Code for your area Page 5 32430 051512 INITIAL SETUP CAUTION The brewer must be disconnected from the power source throughout the initial setup except when specified the instructions Remove the top panel Rotate the control thermostat knob fully counterclockwise to the OFF position and replace the panel Insert an empty funnel into the funnel rails Place a decanter containing a small amount of water on the warmer beneath the funnel 2 Connect the brewer to the power source place the On Off brew station warmer switch the upper position and momentarily press the start switch Water will begin flowing into the tank When water stops flowing into the tank initiate a second and a
16. CT FAILURE TO COMPLY RISKS INJURY THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE 00658 0000 00831 0000F 3 98 1998 BUNN O MATIC CORPORATION 00831 0000 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 reduce risk of electric shock do not remove or open cover No user serviceable parts inside Authorized service personnel only Disconnect power before servicing backflow prevention to comply with federal state and local codes For models installed outside the U S A you must comply with the applicable Plumb ing Sanitation Code for your area 00656 0001 37881 0000 Page 3 32430 051512 ELECTRICAL REQUIREMENTS CAUTION Do not connect the brewer to the power source until specified in Initial Set Up MODELS OL15 amp 20 require 2 wire grounded service rated 120 volts ac 15 or 20 amp re spectively single phase 60 Hz CE REQUIREMENTS This appliance must be installed in locations where it can be overseen by trained personnel For proper operation this appliance must be installed where the temperature is between 5 C to 35 C Appliance shall not be tilted more than 10 for safe operation e An electrician must provide electrical service as speci fied in conformance with all local and national cod
17. WATER LEVEL and OVERFLOW SAFETY SWITCHES Location The water level and overflow safety switches are lo cated under the top cover or top warmer housing and inside and front of the tank fill basin FIG 25 Test Procedure 1 Disconnect the brewer from the power source 2 Remove the top cover or top warmer housing 3 Remove the leads of the switch being tested from the connection block mounted on the front of the tank basin 4 Check the voltage across each black lead of the connection block and the white or red lead on the solenoid coil with a voltmeter Turn the ON OFF switch to the ON position and connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models and three wire 120 240 volt models b 200 or 240 volts ac for two wire 200 volt or 240 volt models C 100 volts ac for two wire 100 volt models 5 Disconnect the brewer from the power source If voltage is present as described proceed to 76 If voltage is not present as described refer to the Wir ing Diagrams and check the brewer wiring harness 6 Check for continuity across the overflow switch pink wires only until the plastic float is raised and check that continuity returns when the float is lowered again 7 Check for continuity across the water level switch pink wires only until the plastic float is raised and check that continuity returns when the float is lowered again Page 24 If continuity is
18. alve 11 Refer to FIG 21 when reconnecting the wires oe ON BLK to Relay WHI to Relay FIG 21 SOLENOID VALVE WIRING 32430 121699 SERVICE cont Relay FIG 22 RELAY Location The relay is located under the top cover or top warmer housing FIG 22 Test Procedure 1 Disconnect the plug terminal from the relay to the main wiring harness Check the voltage across the pins of the black wire P3 and white wire P2 on the main harness with a voltmeter when the On Off brew station warmer switch is in the upper ON position Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models and three wire 120 240 volt models b 200 or 240 volts ac for two wire 200 volt or 240 volt models C 100 volts ac for two wire 100 volt models 2 Disconnect the brewer from the power source 3 Check the voltage across the pins of the blue wire P1 and white wire P2 on the main harness with a voltmeter when the On Off brew station warmer switch is in the upper ON position and the start switch is pressed to the lower posi tion and held Connect the brewer to the power The indication must be as described in step 1 4 Disconnect the brewer from the power source If voltage is present as described reconnect relay plug to harness and proceed to 5 If voltage is not present as described refer to the Wir ing Diagrams and check the brewer wiring har
19. amp P3 ARE PINS OF A POLARIZED THREE PIN CONNECTOR Seer rers nee FX UPPER WARMER BLK WHI BLK WHI BREW STATION WARMER LEVEL SW SAFETY SW _ P1 P2 amp P3 ARE PINS OFA POLARIZED THREE PIN CONNECTOR 120 240 VOLTS AC 3 WIRE GND SINGLE PHASE 60 HZ Page 26 32430 010308 SCHEMATIC WIRING DIAGRAM OLA L1 L2 GRN YEL SW amp L Wi THERMOSTAT SHERHI ems SIDE i TANK HEATER BLK j BLU b BLK WHI KEEP WARM HEATER BLK BLK I I I 5 BREW STATION WARMER BREW SW LEVEL SW SAFETY S e PNK PNK BLK i i EE RED P1 P2 amp ARE PINS OF A POLARIZED THREE PIN CONNECTOR 220 240 VOLTS AC 2 WIRE SINGLE PHASE 50 60 HZ Page 27 32430 121699 SCHEMATIC WIRING DIAGRAM OL25B GRN YEL L1 N HEATER INDICATOR LIMIT SW amp THERMOSTAT THERMOSTATS Bit id 1 I BREW STATION WARMER OVERFLOW BREW SW LEVEL SW PROTECTION SW P1 P2 amp ARE PINS OF A POLARIZED THREE PIN CONNECTOR P2 amp P3 ARE PINS OF A POLARIZED THREE PIN CONNECTOR 1 1 UPPER WARMER 100 VOLTS AC 2 WIRE SINGLE PHASE 50 60 HZ Page 28 32430 121699 SCHEMATIC WIRING DIAGRAM 12 OL35B MAIN ON OFF SWITCH Late Models only READY INDICATOR LIMIT THERMOSTAT P2 amp P3 ARE PINS OF A
20. anter Dripping from sprayhead Probable Cause 1 Control Thermostat 2 Lime build up CAUTION Tank and tank components should be delimed regularly depending on local water conditions Excessive mineral build up on stainless steel surfaces can initiate corrosive reac tions resulting in serious leaks 1 Brewer wired to wrong voltage 1 Improper water pressure 2 Syphon system 1 Syphon system 2 Solenoid Valve Page 11 Remedy Refer to Service Control Thermo Stat for testing procedures See page 13 Inspect the tank assembly for ex cessive lime deposits Delime as required Refer to Electrical Requirements Page 4 Check the operating water pressure to the brewer It must be between 20 and 90 psi Water should flow freely from the sprayhead and then stop abruptly The brewer must be level from front to back to syphon properly Water should flow freely from the sprayhead and then stop abruptly The brewer must be level from front to back to syphon properly Refer to Service Solenoid Valve for testing procedures See page 20 32430 121699 TROUBLESHOOTING cont Problem Probable Cause Beverage overflows decanter 1 Beverage left in decanter Weak beverage 1 Type of paper filters 2 Coffee 3 Sprayhead 4 Funnel loading 5 Water temperature Brewer is making unusual noises 1 Solenoid Valve 2 Plumbing lines 3 Water supply Page 12 Remedy The brew cycle sh
21. arranty 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 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 Bun
22. 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 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 w
23. er BLKL1 to Right Front Warmer Switch 32430 121699 SERVICE cont Start Switch FIG 12 START SWITCH MODEL OL FIG 13 START SWITCH MODEL RL Location The start switch is located in the base below and to the right of the brew station FIG s 12 amp 13 Test Procedure 1 Disconnect the 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 terminals in the upper position Page 18 If continuity is 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 housing 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 hous ing 4 Refer to FIG 14 when reconnecting the wires 83 BLU to Relay P1 BLK to Relay P3 Ne nd amp Level Switch FIG 14 START SWITCH WIRING 32430 121699 SERVICE cont Indicator Lamp s FIG 16 INDICATOR LAMP MODEL RL Location The indicator lamps are located beneath their associ ated warmers FIG
24. es This appliance must not be cleaned by water jet This appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowl edge unless they have been given instructions con cerning use of this appliance by a person responsible for its safety Children should be supervised to ensure they do not play with the appliance fthepowercord is ever damaged it must be replaced by the manufacturer or authorized service personnel with a special cord available from the manufacturer or its authorized service personnel in order to avoid a hazard Machine must not be immersed for cleaning MODELS 0L35 amp RL35 require 3 wire grounded service rated 120 208 or 120 240 volts ac 20 amp single phase 60 Hz 200 230 or 240V A C 100V A C MODELS OLA RLA OL35B amp RL35B require 2 wire ground ed service rated 240 volts ac or 200 volts ac 20 amp single phase 50 Hz MODEL OL25B requires 2 wire grounded service rated 100 volts ac 20 amp single phase 50 Hz Electrical Hook Up Model OL15 has an attached cordset Models OL20 OL35 amp RL35 proceed as follows CAUTION Improper electrical installation will damage electronic components 1 Anelectrician must provide electrical service as specified 2 Using a voltmeter check the voltage and color coding of each conductor at the electrical source 3 Remove the
25. fer to FIG 19 when reconnecting the wires BLK to Terminal Block BLU to BLU Lead from Control Thermostat FIG 19 LIMIT THERMOSTAT WIRING 32430 070700 SERVICE cont Solenoid Valve FIG 20 SOLENOID VALVE Location The solenoid valve is located under the top cover or top warmer housing FIG 20 Test Procedure 1 Check the voltage across the white and the black and blue wires with a voltmeter when the On Off brew station warmer switch is in the upper posi tion and the start switch is pressed to the lower position and released Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models and three wire 120 240 volt models b 200 or 240 volts ac for two wire 200 volt or 240 volt models C 100 volts ac for two wire 100 volt models 2 Disconnect the brewer from the power source If voltage is present as described proceed to 3 If voltage is not present as described refer to the Wir ing Diagrams and check the brewer wiring harness 3 Check for continuity across the solenoid valve coil terminals If continuity is present as described reconnect the white and the black and blue wires and proceed to 4 If continuity is not present as described replace the solenoid valve Page 21 4 Check the solenoid valve for coil action Connect the brewer to the power source place the On Off brew station warmer switch in the upper posi tion
26. is held in the lower position Fig 29 Check for continuity across the two terminals on the switch at L2 RED and RED to Main Harness when it is held in the lower position Continuity must not be present across these terminals in the upper position If continuity is present as described reconnect the wires the switch is operating properly If continuity is not present as described replace the switch P1712 FIG 27 MASTER ON OFF SWITCH MODEL OL Removal and Replacement 1 Remove all wires from the switch terminals 2 Remove the two screws from the outside of the base and gently push the switch through the opening 3 Locate the new switch into the opening and se cure with screws removed in step 2 4 Refer to FIG 29 when reconnecting the wires Incoming Power Supply L1 BLK L2 RED B cU Main Wiring harness P1713 FIG 28 MASTER ON OFF SWITCH MODEL RL RED Location The Master ON OFF switch is located in the base at the left rear FIG s 27 amp 28 P3955 Test Procedure FIG 29 MASTER ON OFF SWITCH WIRING 1 Disconnect the brewer from the power source and remove the wires from all terminals of the Master ON OFF switch Page 25 32430 010308 BLK WHI BLK BLK SCHEMATIC WIRING DIAGRAM OL 35 E MAIN ON OFF SWITCH Late Models only BLK SW amp LIMIT THERMOSTAT THERMOSTAT TANK HEATER BLU WHI P2
27. n 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 savemycoffee 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 32430 030912 CONTENTS 2 p arn en entr pig eoa tne 2 User OUNCES 3 Electrical Requirements 4 Plumbing Requirements 4 Initial 5 Operating 6 Coffee
28. ness Page 22 5 Disconnect the plug terminal from the relay to the solenoid jumper wire Check the voltage across the pins of the black wire P3 and white wire P2 on the relay with a voltmeter when the On Off brew station warmer switch is in the upper ON position Connect the brewer to the power ea The indication must be as described in step 1 6 Disconnect the brewer from the power source 7 Check the voltage across the pins of the blue wire P1 and white wire P2 on the relay with a voltmeter when the On Off brew station warmer switch is in the upper ON position and the start switch is pressed to the lower position and re leased Connect the brewer to the power source The indication must be as described in step 1 8 Disconnect the brewer from the power source If voltage is present as described the relay is operat ing properly If voltage is not present as described remove and replace the relay Removal and Replacement Disconnect the brewer from the power source Remove the top cover or top warmer housing Disconnect both plug terminals from the relay Remove the two 78 32 screws attaching the relay and bracket assembly to the component bracket Remove the 76 32 screw attaching the relay to the bracket 6 Securely attach the new relay to the bracket using the 76 32 screw 7 Attach the new relay and bracket assembly to the component bracket using the two 78 32 screws 8 Reconnect the relay
29. nnecting the wires 4 Push the new switch firmly into the opening wr BLK A see below BLK B see below FIG 9 WARMER SWITCH WIRING MODEL OL Upper to Warmer to Indicator Lamp BLKB to Harness P3 OL On Off Brew Station BLK A to Indicator Lamp to Brew Station Warmer to Level Switch BLK B Terminal Block RL On Off Brew Station to Indicator Lamp to Level Switch to Brew Station Warmer BLKB to Left Front Warmer Switch to Right Front Warmer Switch Page 16 32430 121699 SERVICE cont Warmer Switch es RL Left Rear Left Front Right Rear amp Right Front FIG 10 WARMER SWITCHES Location These warmer switches are the two at the left and the left most one on the right of the base as viewed from the front FIG 10 Their knobs are marked Off On Off On To test these switches access will also be needed to the terminal block located in the rear of the brewer Test Procedure 1 Check the voltage across terminal L1 and the white or red wire on the terminal block with a voltmeter Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models and three wire 120 240 volt models b 200 or 240 volts ac for two wire 200 volt or 240 volt models C 100 volts ac for two wire 100 volt models 2 Disconnect the brewer from the power source
30. onnect the brewer from the power source before the removal of any panel or the replace ment of any component The control thermostat solenoid valve and relay are located under the top cover or top warmer hous ing FIG 1 attached with three 8 32 slotted head screws The base warmer s switch es indicator lamp start switch tank keep warm heater and terminal block are located in the base Access is gained by removing the rear panel FIG 1 attached with two 8 32 slotted head screws The limit thermostat and tank heater are located on the tank assembly Access is gained by removing the rear panel FIG 1 attached with two 8 32 slotted head screws On the model OL the upper warmer switch and associated indicator lamp are located on the removable top warmer housing FIG 1 WARNING Inspection testing and repair of electri cal equipment should be performed only by qualified service personnel The brewer should be disconnected from the power source when servicing except when electrical tests are required and the test procedure specifically states to connect the brewer to the power source Contents Control Thertmostal 13 Warmer s OL Brew Station amp 14 RL Left Rear Left Front Brew Station Right Rear amp Right 14 Warmer Switch es OL On Off Brew Station amp
31. ould be started only with an empty decanter under the funnel BUNN paper filters should be used for proper extraction A sufficient quantity of fine or drip grind coffee should be used for proper extraction 0 sprayhead 01082 0000 should be used to properly wet the bed of ground coffee in the funnel The BUNN paper filter should be centered in the funnel and the bed of coffee leveled by gentle shaking Place a funnel over an empty de canter on the warmer beneath the sprayhead Place the On Off brew station warmer switch in the upper position press the start switch and check the water temperature immediately below the sprayhead with an accurate thermometer The reading should not be less than 195 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 rest on the counter top A The brewer must be connected to a cold water line B Water pressure to the brewer must not be higher than 90 psi Install a regulator if necessary to lower the working pressure to ap proximately 50 psi 32430 121699 SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessary Refer to Troubleshooting for assistance in determining the cause of any problem Component Access WARNING Disc
32. p warmer housing and the rear access panel Disconnect the wires to the tank heater Gently pull the thermostat bulb with grommet out of the tank lid Disconnect and remove the fill basin tube Remove the four 8 32 nuts and hold down brack ets attaching the tank lid to the tank assembly and remove the tank lid and gasket Drain the water from the tank using a syphon or similar device Remove the two nuts securing the tank heater to the bottom of the tank and remove the tank heater Install a new tank heater with new washers and secure with two nuts Nuts should be securely tightened to insure a proper seal Install the tank lid and gasket using the four hold down brackets and 8 32 nuts Install the fill basin tube and tighten the nuts se curely Slide the grommet to the red mark on the capillary tube Carefully bend the capillary tube so that the tube and bulb inside the tank are in a vertical posi tion Insert the bulb through the hole in the tank lid and press the grommet firmly and evenly so that the groove in the grommet fits into the tank lid Refer to FIG 24 when reconnecting the wires Refer to Initial Setup to refill the tank WHI Models 0115 8 20 to Terminal Block _ RED Models 0135 amp RL35 to Terminal Block BLK to Control Thermostat FIG 24 TANK HEATER WIRING 32430 121699 SERVICE cont Water Level and Overflow Safety Switch FIG 25
33. present as described reconnect the wires as shown in FIG 30 the switches are operating properly If continuity is not present as described replace the failed switch Removal and Replacement Disconnect the brewer from the power source 1 2 Remove the top cover or top warmer housing 3 Remove the wire leads connecting the water level and overflow switches to the terminal block at the front of the tank and fill basin 4 Disconnect the 78 32 screw and remove the entire switch assembly from the tank and fill basin 5 Place the new switch assembly into the bracket wires up NOTE The magnets must be at the top of the float and there must be NO adjusting washers installed for the overflow safety switch to operate properly 6 Install the nuts over the wires and secure the switch to the mounting bracket Do not over tighten 7 Attach the entire switch assembly to the tank and fill basin using the 78 32 screw 8 Add or remove washers to the float on the level switch as required Adding washers increases the volume removing washers decreases it 9 Refer to FIG 26 and the relative wiring diagram when reconnecting wires to BLK on Start Switch to BLK on Brew Station Warmer Switch FIG 26 WATER LEVEL and OVERFLOW SAFETY SWITCH WIRING 32430 121699 SERVICE cont Master ON OFF Switch 2 Check for continuity across the two terminals on the switch at L1 BLK and BLK to Main Harness when it
34. r lamp using the chart below If continuity is present as described proceed to 6 If continuity is not present as described refer to the Wiring Diagrams and check the brewer wiring har ness 6 Check for continuity across the two terminals on the warmer If continuity is present as described the warmer is operating properly If continuity is not present as described replace the warmer Removal and Replacement Remove the 74 40 slotted head screws holding the warmer to the brewer Lift the warmer assembly from the brewer Disconnect both wires from the warmer Refer to FIG 6 when reconnecting the wires Place the new warmer into the brewer and se curely attach it using the 24 40 screws ore Com WHI or RED see below BLK to Warmer Switch FIG 6 WARMER WIRING MODEL OL Upper WHI OR RED to Indicator Lamp OL Brew Station WHI OR RED to Indicator Lamp to Terminal Block RL Left Rear WHI OR RED to Terminal Block to Brew Station Warmer RL Left Front WHI OR RED to Indicator Lamp to Terminal Block RL Brew Station WHI OR RED to Relay P2 to Left Rear Warmer RL Right Front WHI OR RED to Right Rear Warmer to Indicator Lamp RL Right Rear WHI OR RED to Right Front Warmer 32430 121699 SERVICE cont Warmer Switch es OL On Off Brew Station amp Upper RL On Off Brew Station FIG 8 WARMER SWITCHES Location These switches are located beneath and to the left of their associated wa
35. r warmer Rotating the knob to the OFF position cuts power to the left rear warmer G Left Front Warmer Rotary Switch Rotating the knob to the ON position supplies power to the left front warmer Rotating the knob to the OFF position cuts power to the left front warmer MODEL RL H Right Front Warmer Rotary Switch Rotating the knob to the ON position supplies power to the right front warmer Rotating the knob to the OFF position cuts power to the right front warmer l Right Rear Warmer Rotary Switch Rotating the knob to the ON position supplies power to the right rear warmer Rotating the knob to the OFF position cuts power to the right rear warmer Page 7 32430 121699 COFFEE BREWING Start each brew cycle with an empty clean half gallon decanter 1 Insert a BUNNQ filter into the funnel 2 Pourthe fresh coffee into the filter and level the bed of grounds by gently shaking 3 Slide the funnel into the funnel rails 4 Place the On Off brew station warmer switch in the upper position 5 Momentarily press the start switch 6 When brewing is completed simply discard the grounds and filter CLEANING 1 The use of a damp cloth rinsed in any mild non abrasive liquid detergent is recommended for cleaning all 2 3 surfaces on Bunn O Matic equipment Check and clean the sprayhead The sprayhead holes must always remain open With the sprayhead removed insert the
36. rmers as viewed from the front FIG s 7 and 8 Test Procedure 1 Locate the switch terminal with black wires that do not go to the nearby indicator lamp 2 Check the voltage across this terminal and the terminal on the indicator lamp with white or red wires with a voltmeter Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models and three wire 120 240 volt models b 200 or 240 volts ac for two wire 200 volt or 240 volt models C 100 volts ac for two wire 100 volt models 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 Diagrams and check the brewer wiring harness 4 Check the voltage across the other switch ter minal and the terminal on the indicator lamp with white or red wires with a voltmeter when the switch is in the upper position Connect the brewer to the power source The indication must be as described in step 2 Voltage must not be present across these terminals in the lower posi tion 5 BDisconnect the brewer from the power source If voltage is present as described the switch is operat ing properly If voltage is not present as described replace the switch Removal and Replacement Compress the clips inside the housing and gently push the switch through the opening Remove the wires from the switch terminals Refer to FIG 9 when reco
37. roove in the grommet fits into the tank lid 8 Carefully bend the capillary tube so that the tube and bulb inside the tank are in a vertical posi tion 9 Refer to FIG 3 when reconnecting the wires 10 Readjust the control thermostat dial as re quired BLU to Limit Thermostat BLK to Tank Heater FIG 3 THERMOSTAT WIRING 32430 121699 SERVICE cont Warmer s OL Brew Station amp Upper RL Left Rear Left Front Brew Station Right Rear amp Right Front FIG 5 WARMERS Location OL One of the warmers is beneath the brew funnel and the other is on the top lid FIG 4 RL These warmers include the one beneath the brew funnel the ones on the right and left of the brew station and the one above and to the left and right of the brew station as viewed from the front FIG 5 Test Procedure 1 Oncethe switch has been tested and switch failure has been eliminated proceed as follows 2 Disconnect the brewer from the power source and remove the 4 40 screws attaching the warmer being tested 3 Lift the warmer assembly from the brewer and invert the warmer making the wire terminals ac cessible for testing 4 Check for continuity from the switch to the black wire at the warmer element If continuity is present as described proceed to 5 Page 15 9 Check for continuity from the wire terminal of the white or red wire to the splice or indicato
38. s 15 and 16 Test Procedure 1 Check continuity of the black wire from the switch to the indicator lamp 2 Check continuity of the white or red wire from the indicator lamp to the terminal block If continuity is present proceed to 73 If continuity is not present refer to Wiring Diagrams and check brewer wiring harness 3 Check for voltage across the indicator lamp ter minals Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models and three wire 120 240 volt models b 200 or 240 volts ac for two wire 200 volt or 240 volt models C 100 volts ac for two wire 100 volt models Page 19 4 Disconnect the brewer from the power source If voltage is present the indicator lamp is operating properly If voltage is not present replace the indicator lamp Removal and Replacement 1 Compress the clips inside the housing and gently push the indicator lamp through the opening 2 Remove the wires from the indicator lamp termi nals 3 Refer to FIG 17 when reconnecting the wires 4 Push the new indicator lamp firmly into the opening Dp el WHI or RED see below BLK see below FIG 17 INDICATOR LAMP WIRING MODEL OL Upper WHI or RED to Warmer Switch to Warmer to Harness P2 OLLower BLK to On Off Brew Station Warmer Switch
39. t Switch 6 Relay 7 Solenoid Valve 1 Solenoid Valve 1 Start Switch 1 Limit Thermostat CAUTION Do not eliminate or bypass limit thermostat Use only replace ment part 29329 1000 2 Control Thermostat 3 Tank Heater 1 Warmer Switches 2 Decanter Warmers Page 10 Remedy Refer to Service On Off Brew Station Warmer Switch for testing procedures See page 15 Refer to Service Start Switch for testing procedures See page 17 Refer to Service Relay for testing procedures See page 21 Refer to Service Solenoid Valve for testing procedures See page 20 Refer to Service Solenoid Valve for testing procedures See page 20 Refer to Service Start Switch for testing procedures See page 17 Refer to Service Limit Thermostat for testing procedures See page 19 Refer to Service Control Thermo stat for testing procedures See page 13 Refer to Service Tank Heater for testing procedures See page 22 A The Warmer Switch es must be in the ON position for the warmer to operate B Refer to Service Warmer Switch es for testing procedures See pages 15 amp 16 Refer to Service Warmers for test ing procedures See page 14 32430 070700 TROUBLESHOOTING cont Problem Spitting or unusual steaming from sprayhead Warmer plates too hot solenoid coil smoking or water in tank heats excessively fast Inconsistent beverage level in de c
40. top panel and rotate the control thermostat knob fully counterclockwise to the OFF position and replace the panel 4 Remove the rear panel feed the cord through the strain relief and connect it to the terminal block 5 Connect the brewer to the power source and verify the voltage at the terminal block before proceeding Replace the rear panel 6 If plumbing is to be hooked up later be sure the brewer is disconnected from the power source If Plumbing has been hooked up the brewer is ready for Initial Set Up Page 4 32430 051512 PLUMBING REQUIREMENTS This brewer must be connected to a cold water system with operating pressure between 20 and 90 psi 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 to reduce it to 50 psi 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 VOU an attached water strainer proceed step 2 Models OL20 OL35 amp RL
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