Installation & Operation Manual - Expert-CM
Contents
1. e e BLK BLK 41 WHI 1 1 WHI KEEP WARM HEATER P1 P2 amp BLK P3 ARE WHI GRN PINS OF A BLK POLARIZED THREE PIN CONNECTOR 120 240 VOLTS AC 3 WIRE GND TIMER 72 S SINGLE PHASE 60 HZ WHI Page 28 32440 010308 SCHEMATIC WIRING DIAGRAM OT L1 L2 N GREEN LIMIT THERMOSTAT D D BREW STATION WARMER d BLU 2 BLU BLK etree BLK P1 P2 amp P3 ARE PINS OF A POLARIZED Ds CONTROL GRINDER E INTERFACE 2 ass n Nene bn uz 120 240 VOLTS 3 WIRE SINGLE PHASE Page 29 32440 070700 SCHEMATIC WIRING DIAGRAM OTA L1 L2 GRN YEL SW amp L LIMIT I HERMOSTAT THERMOSTAT yr D 1 RED BLK I I UPPER WARMER P1 P2 amp P3 ARE PINS OF A POLARIZED THREE PIN 240 VOLTS AC CONNECTOR 2 WIRE 1 SINGLE PHASE 50 60 HZ pU Page 30 32440 070700 SCHEMATIC WIRING DIAGRAM OT25B L1 READY INDICATOR N BLK GRN YEL LIMIT B 5 P1 P2 amp P3 ARE PINS OF A POLARIZED THREE PIN CONNECTOR 100 VOLTS AC 2 WIRE 3 p SINGLE PHASE mR M 50 60 HZ TTE Page 31 32440 070700 SCHEMATIC WIRING DIAGRAM OT35B T READY INDICATOR _ yey GRN YEL LIMIT W a2. OT S N RT00005364 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 32440 0000D 05 12 1999 BUNN O MATIC CORPORATION 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 fro
3. Dai 22 Start dise 23 Tank Heater eae es 24 Thermal Cut off eee re 25 Master 26 Wiring SE MONAT OS omnibns 27 FIG 1 ACCESS PANELS Page 13 32440 010308 Brew Timer Early Models 2 BREW TIMER Location The brew timer is located behind the front panel to the right of the tank FIG 2 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 counterclock wise 2 Check the voltage across sockets 2 amp 3 white or red and black wires of the female connector with a voltmeter when the On Off brew station warmer switch is in the upper position Connect the brewer to the power source The indication must a 120 volts ac for two wire 120 volt mod els 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 4 Check the voltage across sockets 1 amp 2 blue and white or red wires of the female connector with a voltmeter when the On Off brew station war
4. 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 in the decanter after water has stopped flowing from the funnel It should be 64 ounces If not adjust the Timer as described in Adjusting Brew Volumes page 6 Repeat steps 13 15 until 64 oz water volume is achieved 32440 070700 ADJUSTING BREW VOLUMES CAUTION Disconnect the power source from the brewer prior 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
5. TO COMPLY RISKS INJURY PN 00658 0000G 02 08 1985 BUNN O MATIC CORPORATION 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 the risk 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 32440 051512 ELECTRICAL REQUIREMENTS CAUTION Do not connect the brewer to the power source until specified in Initial Set Up 120V A C MODELS OT15 amp 20 require 2 wire grounded service rated 120 volts ac 15 or 20 amp respectively single phase 60 Hz Model 15 has an attached cordset Electrical Hook Up 120V A C 120V A C MODELS 0T35 amp RT35 require 3 wire grounded service rated 120 208 or 120 240 volts ac 20 amp single phase 60 Hz Model OT15 has an attached cordset Models OT20 OT35 amp RT35 proceed as follows CAUTION Improper electrical installation wi
6. 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 brewer housing 6 the capillary tube up though the brewer trunk NOTE Make sure that the capillary tube is away from any electrical termination and is not kinked 7 Slide the grommet to the red mark on the capillary tube 8 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 9 Carefully bend the capillary tube so that the tube and bulb inside the tank are in a vertical posi tion 10 Refer to FIG 7 when reconnecting the wires 11 Readjust the control thermostat dial as re quired r BLU to Limit Thermostat BLK to Tank Heater FIG 7 THERMOSTAT WIRING 32440 070700 SERVICE cont Warmer s OT Brew Station amp Upper RT Left Rear Left Front Brew Station Right Rear amp Right Front FIG 9 WARMERS Location OT One of the warmers is beneath the brew funnel and the other is on the top lid FIG 8 RT 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 9 Test Procedure 1 Once the switch has been tested and switch failure has
7. 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 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 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 620 kPa Install a regulator if necessary to lower the working pressure to ap proximately 50 psi 345 kPa 2440 070700 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 Disconnect the brewer from the power source before the removal of any panel or the replace ment of any component The brew timer and control thermostat are lo cated behind the front panel FIG 1 located beneath the brew funnel attached with four 78 32 slotted head screws The base warmer s switch es indicator lamp start switch tank keep warm heater t
8. is once again placed in the SET position OPERATING CONTROLS MODELS OT amp RT A On Off Brew Station Warmer Switch Placing the switch in the upper position supplies power to the brew station warmer and enables brew ing Placing the switch in the lower position cuts power to the brew station warmer and stops brewing 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 Off brew station warmer switch must be in 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 Page 7 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 rear warmer Rotating the knob to the OFF position cuts power to the left rear warmer G Left Front Warmer Rotary Switch Rotating
9. procedures See page 13 amp 14 Refer to Service Limit Thermostat for testing procedures See page 21 Refer to Service Control Thermo stat for testing procedures See page 16 Refer to Service Tank Heater for testing procedures See page 24 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 18 amp 19 Refer to Service Warmers for test ing procedures See page 17 32440 070700 TROUBLESHOOTING cont Problem Spitting or unusual steaming from sprayhead Inconsistent beverage level in de canter Consistently high or low beverage level in decanter 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 How control 2 Improper water pressure 3 Syphon system 1 Brew Timer adjustment 1 Syphon system 2 Solenoid Valve Page 11 Remedy Refer to Service Control Thermo stat for testing procedures See page 16 Inspect the tank assembly for ex cessive lime deposits Delime as required A Direction of flow arrow must be pointing away from the solenoid B Remove the control and check for obstructions Clear or
10. replace Check the operating water pressure to the brewer It must be between 20 and 90 psi 138 and 620 kPa Water should flow freely from the sprayhead for approximately twenty seconds after the brew solenoid has shut off and then stop flow ing abruptly The brewer must be level from front to back to syphon properly Adjust the brew timer as required to achieve the recommended 64 oz 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 flow ing abruptly The brewer must be level from front to back to syphon properly Refer to Service Solenoid Valve for testing procedures See page 22 32440 070700 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 4 Solenoid Valve 2 Plumbing lines 3 Water supply Page 12 Remedy The brew cycle should 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
11. 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 22 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 Refer to FIG 20 when reconnecting the wires BLK to Terminal Block BLU to BLU Lead from Control Thermostat FIG 20 LIMIT THERMOSTAT WIRING 32440 070700 SERVICE cont Solenoid Valve FIG 21 SOLENOID VALVE Location The solenoid valve is located below and to the left of the tank as viewed from the rear FIG 21 Test Procedure 1 Check the voltage across the white and black wires with a voltmeter when the On Off brew sta tion warmer 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 a 120 volts ac for two
12. 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 forthe approximate setting on the brew timer dial and then return to zero 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 black wires and proceed to 4 If continuity is not present as described replace the solenoid valve Page 23 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 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 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 R
13. GOMES edel stro 7 22 7 Troubleshooting i ioo orco 8 NIRE MN NR RON RN m NOTER 12 Wiring Diagrams esed caeca 20 INTRODUCTION This equipment will brew a half gallon batch of coffee into an awaiting decanter at the press of a button The OT has two and the RT has five warmers to keep the beverage at the right temperature on the RT 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 S 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 PRODUCT FAILURE
14. I OR RED to Terminal Block to Brew Station Warmer RT Left Front WHI OR RED to Indicator Lamp to Terminal Block RT Brew Station WHI OR RED to Timer P2 to Left Rear Warmer RT Right Front WHIORRED to Right Rear Warmer to Indicator Lamp RT Right Rear WHIORRED to Right Front Warmer 32440 070700 SERVICE cont Warmer Switch es OT On Off Brew Station amp Upper RT On Off Brew Station FIG 12 WARMER SWITCHES Location These switches are located beneath and to the left of their associated warmers as viewed from the front FIG s 11 and 12 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 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 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 brewerto
15. REE PIN CONNECTOR BREW WHI P2 WHI vi TIMER 72 5 BLK Li 1 SE BLK WHI LEFT REAR WARMER D 0 LEFT FRONT WARMER I RIGHT FRONT WARMER I ON ON RIGHT REAR WARMER 120 VOLTS AC 2 WIRE SINGLE PHASE 50 60 HZ Page 35 32440 070700
16. 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 1 Remove the one 78 32 screw securing circuit board to the mounting bracket 2 Remove circuit board and spacers as required 32440 070700 SERVICE cont DIGITAL BREW TIMER Late Models cont 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 newcircuit board with spacers as required to the component mounting bracket 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 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 press 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 volu
17. been eliminated proceed as follows 2 Disconnect the brewer from the power source and remove the 74 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 75 Page 18 9 Check for continuity from the wire terminal of the white or red wire to the splice or indicator 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 1 Remove the 24 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 10 when reconnecting the wires Place the new warmer into the brewer and se curely attach it using the 74 40 screws CP CO WHI or RED see below BLK to Warmer Switch FIG 10 WARMER WIRING MODEL OT Upper WHI OR RED to Indicator Lamp OT Brew Station WHIORRED to Indicator Lamp to Terminal Block RT Left Rear WH
18. d reconnect the wires the switch is operating properly If continuity is not present as described replace the switch P1687 Removal and Replacement FIG 29 MASTER ON OFF SWITCH MODEL OT 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 31 when reconnecting the wires Incoming Power Supply L1 BLK L2 RED P1688 Main Wiring harness BLK FIG 30 MASTER ON OFF SWITCH MODEL RT Location The Master ON OFF switch is located in the base at the left rear FIG s 29 amp 30 RED P3955 FIG 31 MASTER ON OFF SWITCH WIRING Test Procedure 1 Disconnect the brewer from the power source and remove the wires from all terminals of the Master ON OFF switch Page 27 32440 010308 SCHEMATIC WIRING DIAGRAM L1 12 N OT 15 OT 20 amp OT 35 Sam GREEN d 5 5121 SI ioi S EIE e zio ee a i i 1 7 1 zi MAIN ON OFF SWITCH 25 i Late 01208350 4 P oq 5i Models only i ud it 1 A E i BLK OT20 amp 35 ici BLK OT20 amp 35_ SW amp LIMIT FAUCET OF TION ONLY THERMAL CUT OFF i THERMOSTA N TANK HEATER WHI 20 35
19. ectric 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 intermittent 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 Make certain that all plumbing connections are sealed and electrical connections tight and isolated This brewer is heated at all times unless disconnected from the power source Keep away from combus tibles 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 C
20. emoval and Replacement 1 Remove all wires from the solenoid valve coil 2 Turn off the water supply to the brewer 3 Remove the bottom pan attached with one or more 8 32 slotted head screw s beneath the front of the brewer 4 Raise the brewer approximately six inches from the counter top and support the feet on something sturdy Disconnect the water lines to and from the sole noid valve Remove the two 10 32 screws holding the sole noid valve to the bracket Lift out the solenoid valve Securely install the new solenoid valve to the bracket Check the direction of flow arrow on the valve It must be pointing toward the flow control 9 Securely fasten the water lines to and from the solenoid valve 10 Refer to FIG 22 when reconnecting the wires oN m BLK to Brew Timer WHI to Brew Timer FIG 22 SOLENOID VALVE WIRING 32440 070700 SERVICE cont Start Switch FIG 24 START SWITCH MODEL RT Location The start switch is located in the base below and to the right of the brew station FIG s 23 amp 24 Test Procedure 1 Disconnect the brewer from the power source and remove the wires from both terminals of the start switch 2 Checkfor 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 24 If continuity is present as described reconnect the wires the s
21. en reconnecting the wires Readjust the timer dial as required P1 BLU Start Switch P2 WHI see below P3 BLK to ON OFF Brew Station Warmer Switch BLK to Solenoid Coil FIG 3 BREW TIMER WIRING MODEL OT WHI to Indicator Lamp RT WHI to Brew Station Warmer 32440 070700 SERVICE cont DIGITAL BREW TIMER Late Models FIG 4 DIGITAL BREW TIMER Location The timers are located inside the front of the trunk on the upper right side of the component brackets Test Procedure NOTE Do not remove or install wires while timer board is installed Pressure applied to one side may cause damage to the board 1 Disconnectthe brewer from the power source and remove the front access panel 2 Remove the one 78 32 screw securing circuit board to the mounting bracket 3 Remove circuit board and spacers as required 4 Withavoltmeter checkthe voltage acrossterminals TL1 and TL2 when the ON OFF switch is in the ON position 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 or 240 volt models and three wire 120 240 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 presentas described refertothe Wiring Diagrams and check the brewer wiring harness Page 15 6 Disco
22. er 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 Page 25 Removal and Replacement 1 Remove the wires to the tank heater and limit thermostat terminals 2 Gently pull the thermostat tube with grommet out of the tank lid 3 Remove the sprayhead and sprayhead nut from the panel on the bottom of the hood 4 Disconnect the air vent tube from the fitting above the sprayhead panel 5 On units with faucet disconnect the inlet and outlet tubes from the faucet coil fittings 6 Loosen the eight 8 32 nuts on the tank lid and remove the tank lid 7 Remove the two nuts from the tank heater fit tings 8 Remove the tank heater 9 Install the new tank heater with new sealing wash ers on the underside of the tank lid 10 Securely tighten the nuts to be certain of a wa tertight seal 11 Reinstall the tank lid and tighten the eight nuts 12 Reconnect the air vent tube to the fitting above the sprayhead panel 13 Reconnect the inlet and outlet tubes to the faucet coil fittings on units with faucet 14 Reinstall the sprayhead tube nut and spray head 15 Reinstall the thermostat into the tank lid 16 Refer to FIG 27 when reconnecting the wires WHI Models OT15 amp 20 to Term
23. erminal block and solenoid valve 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 lid Access is gained by removing the top lid FIG 1 attached with three 8 32 slotted head screws On the model OT the upper warmer switch and associated indicator lamp are located on this removable top lid 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 Brew Timer Early 5 13 Digital Timer Late 14 Control Thermostat aio rco eei eai tor edge 16 Warmer s Brew Station amp 17 Left Rear Left Front Brew Station Right Rear amp Right Froni estre ta 17 Warmer Switch es OT On Off Brew Station amp 18 RT On Off Brew Station scias 18 Left Rear Left Front Right Rear amp Right Front Rotary 19 Indicator LAMp S cos 20 21 Solenoid Valve
24. heck 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 Flow Control A Direction of flow arrow must be pointing away from the solenoid B Remove the control and check for obstructions Clear or replace Page 9 32440 121699 TROUBLESHOOTING cont Problem Brew cycle will not start cont Water flows into tank continuously On Off brew station warmer switch OFF Water flows into tank continuously 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 Start Switch 6 Brew Timer 7 Solenoid Valve 1 Solenoid Valve 1 Brew Timer 1 Limit Thermostat CAUTION Do not eliminate or bypass limit thermostat Use only B O M 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 18 Refer to Service Start Switch for testing procedures See page 23 Refer to Service Timer for testing procedures See page 13 amp 14 Refer to Service Solenoid Valve for testing procedures See page 22 Refer to Service Solenoid Valve for testing procedures See page 22 Refer to Service Timer for testing
25. imes Then repeat this step for the air vent 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 OY uUo NEEDLE VALVE ADJUSTMENT Models with Faucet This brewer is equipped with a unique faucet system allowing hot water to be drawn off a cup at a time for instant beverage needs even while brewing WARNING Disconnect the brewer from the power source before the removal of any panel or replacement of any component ADJUSTMENT 1 Disconnect the brewer from the power source and remove the front inspection panel located beneath the brew funnel 2 Adjust the needle valve as required to increase or decrease the pressure of the hot water flowing from the faucet Turn the propeller on the valve in a counterclockwise direction to increase the flow and in a clockwise direction to decrease the flow 3 Reconnect the brewer to the power source and allow the water in the tank to heat to the proper temperature before operating the brewer Page 8 32440 121699 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 Service Department Inspection testing and repair of electrical equipment should be performed only by qualified service person nel e All el
26. inal Block RED Models 35 amp RT35 to Terminal Block BLK to Control Thermostat C 27 TANK HEATER WIRING 32440 070700 SERVICE Thermal Cut off Location The thermal cut off is located on the tank heater FIG 28 Y f X dd FIG 28 THERMAL CUT OFF Page 26 Test Procedures 1 Disconnect the brewer from the power source 2 Disconnect the thermal cut off from the tank heater terminal and the wiring harness 3 Check for continuity across the thermal cut off terminals using an ohmmeter If continuity is present the thermal cut off is operat ing properly If continuity is not present as described replace the thermal cut off Removal and Replacement 1 Disconnect the thermal cut off from the tank heater terminal and the wiring harness 2 Remove thermal cut off and discard 3 Connect new thermal cut off to the tank heater terminal and the wiring harness 32440 070700 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 is held in the lower position Fig 25 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 describe
27. k 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 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 32440 030912 CONTENTS Introduction 2 User OUNCES 3 Electrical Requirements 4 Plumbing Requirements 4 Initial Set Up c M 5 Adjusting Brew 6 Operating 5 6
28. l 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 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 2 Disconnect the brewer from the power source If voltage is present as described proceed to 73 If voltage is not present as described refer to the Wir ing Diagrams and check the brewer wiring harness Page 20 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 ON 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 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 Loosen the 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 15 when reconnecting the wires 5 Securely mount the new switch onto the ho
29. ll damage 208 or 240V A C 200 230 or 240V A C MODELS OTA RTA amp RT35B require 2 wire grounded ser vice rated 240 volts ac or 200 volts ac 20 amp single phase 50 Hz 100VA C MODEL RT requires 2 wire grounded service rated 120 volt ac 25 amp single phase 50 Hz electronic components An electrician must provide electrical service as specified Using a voltmeter check the voltage and color coding of each conductor at the electrical Source Remove the front panel beneath the sprayhead and rotate the control thermostat knob fully counterclockwise to the OFF position and re place the panel Remove the rear panel feed the cord through the strain relief and connect it to the terminal block Connect the brewer to the power source and verify the voltage at the terminal block before proceeding Replace the rear panel 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 32440 010308 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 coppe
30. ltage across the blue wire on the control thermostat and the white or red wire on the tank heater with a voltmeter Connect the 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 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 fully clockwise Connect the brewer to the power source The indication must be as described in step 2 Voltage must not be indicated across Page 17 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 both wires from the control thermostat terminals 2 Remove the top lid from the brewer to gain access to the thermostat bulb 3 Remove the thermostat bulb by firmly pulling up on the capillary tube at the tank lid
31. m 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 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
32. me 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 im mediately press and hold down the START 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 Al low the brew cycle to finish in order to verify that the desired volume has been achieved Page 16 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 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 10 NOTE Several ounces of water will continue to sy phon from the tank after
33. mer 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 as described in step 2 until the start switch is released 5 Disconnect the brewer from the power source Page 14 If voltage is present as described reconnect the polar ized three pin connectors and proceed to 76 If voltage is not present as described refer to the Wir ing Diagrams and check the brewer wiring harness 6 Disconnect the in line connectors on the black and white wires from the timer to the solenoid 7 Check the voltage across the black and white wires with a voltmeter when the On Off brew sta tion warmer 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 as described in step 2 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 wir ing harness and the timer Remove the two 8 32 slotted head screws hold ing the timer to the bracket Install the new timer to the bracket Refer to FIG 3 wh
34. mp THERMOSTAT THERMOSTA 5 EM amp IDEE 05 D 0 0 lt P1 P2 amp P3 ARE 200 VOLTS AC PINS OF A 2 WIRE lt POLARIZED SINGLE PHASE THREE PIN 50 60 HZ CONNECTOR BREW P2 TIMER 72 WHS Page 32 32440 070700 SCHEMATIC WIRING DIAGRAM RT GREEN MAIN ON OFF SWITCH Late Models only SW amp FAUCET OPTION ONLY LIMIT THERMOSTAT THERMAL CUT OFF THERMOSTAT B B TANK HEATER I KEEP WARM HEATER WARMER P1 P2 amp ARE PINS OF A POLARIZED THREE PIN CONNECTOR OPTIONAL FLASHING INDICATOR SYSTEM WHI RED 120 240 VOLTS AC 3 WIRE SINGLE PHASE 60 HZ Page 33 32440 010308 L1 SCHEMATIC WIRING DIAGRAM RTA GRN YEL LIMIT SW amp gt THERMOSTA THERMOSTAT BLK je oris H BLK RED E TANK HEATER BLK PR WARMER BLK lt PINS OF A POLARIZED BLK THREE PIN CONNECTOR BREW P2 TIMER 2 5 BLK Li 1 i BLK I 1 LEFT WARMER 0 0 LEFT FRONT WARMER 1 1 RIGHT FRONT WARMER 1 1 ON ON RIGHT REAR WARMER 240 VOLTS AC 2 WIRE SINGLE PHASE 50 60 HZ Page 34 P1 P2 amp P3 ARE RED RED 32440 070700 SCHEMATIC WIRING DIAGRAM RT L1 GRN YEL SW amp i LIMIT THERMOSTAT THERMOSTAT BLK BLU ie i WHI i i TANK HEATER BLK pom ARMER P1 P2 amp P3 ARE BLK rig oU PINS OF A POLARIZED BLK TH
35. nnectthe white blue wire from terminal TL3 and the blue black wire from terminal TL5 With a voltmeter checkfor continuity across thetwo wires when the ON OFF switch is in the ON position upper and the START switch is pressed 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 or 240 volt models and three wire 120 240 volt models C 100 volts ac for two wire 100 volt models If continuity is present as described reconnect the wires and proceed to 77 If continuity is not present as described refer to the Wiring Diagrams and check the brewer wiring har ness 7 Withavoltmeter checkthe voltage acrossterminals TL1 and TL4 when the ON OFF switch is in the ON position Connect the brewer to the power source The indication must be O volts If voltage is as described proceed to 78 If voltage is not as described disconnect the brewer from the power source and replace the timer 8 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 and press the START switch The indication must be as follows a 120 volts ac for two wire 120 volt models b 200 or 240 volts ac for two wire 200 or 240 volt models and three wire 120 240 volt models C 100 volts ac for two wire 100 volt models If voltage is present
36. r 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 Model P ee an attached water strainer proceed to Models O10 0135 amp RT35 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 solenoid Reinstall the bottom 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 INITIAL SETUP CAUTION The brewer must be disconnected from the power source throughout the initial set up except when specified in the instructions 1 2 Remove the front panel Rotate the cont
37. 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 Setting batch sizes 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 lower 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
38. rol thermostat knob fully counter De 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 Connect the brewer to the power source place the On Off brew station warmer switch the up per 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 third brew cycle During this third brew cycle the tank will fill to its capacity and the excess will flow from the spray head 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 6 Place the On Off brew station warmer switch in the lower position 7 Disconnect the brewer from the power source 8 Remove the front panel 10 Pm 13 14 15 16 Rotate the control thermostat knob fully clock the ON position and replace the front panel Connect the brewer to the power source and wait approximately twenty minutes 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 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
39. tage 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 18 when reconnecting the wires 4 Push the new indicator lamp firmly into the opening pe WHI or RED see below MR a BLK see below FIG 18 INDICATOR LAMP WIRING MODEL OTUpper BLK to Warmer Switch WHI or RED 10 Warmer to Harness P2 OT Lower BLK to Start Switch to On Off Brew Station Warmer Switch WHI or RED to Timer P2 to Brew Station Warmer RT BLK to Start Switch to On Off Brew Station Warmer Switch WHI RED 10 Right Front Warmer to Left Front Warmer 32440 070700 SERVICE cont Limit Thermostat MIT THERMOSTAT FIG 19 LI Location The limit thermostat is located on the tank lid between the tank heater terminals FIG 19 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
40. 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 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 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 32440 121699 MODEL OT MODEL RT COFFEE BREWING Start each brew cycle with an empty clean half gallon decanter Insert a BUNNQ 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 Off brew station warmer switch in the upper position Momentarily press the start switch When brewing is completed simply discard the grounds and filter LEANING 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 2 Check and clean the sprayhead The sprayhead holes must always remain open 3 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 t
41. 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 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 Compress the clips inside the housing and gently push the switch through the opening 2 Remove the wires from the switch terminals 3 Refer to FIG 13 when reconnecting the wires 4 Push the new switch firmly into the opening BLK A see below BLK B see below FIG 13 WARMER SWITCH WIRING MODEL OT Upper to Warmer to Indicator Lamp BLKB to Harness P3 OT On Off Brew Station to Indicator Lamp to Brew Station Warmer to Timer P3 BLK Terminal Block RT On Off Brew Station to Indicator Lamp to Timer P3 to Brew Station Warmer BLK B to Left Front Warmer Switch to Right Front Warmer Switch Page 1 9 32440 070700 Warmer Switch es RT Left Rear Left Front Right Rear amp Right Front FIG 14 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 14 Their knobs are marked Off On Off On To test these switches access wil
42. 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 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 BUNNlin
43. 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 3 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 TL5 Ei pe TL2 E x TL1 SET amp BLU BLK wire from TL5 to P1 WHI GRN wire from TL4 to WHI Solenoid WHI BLU wire from TL3 to BLK Solenoid WHI wire from TL2 to P2 BLK wire from TL1 to P3 P2037 5 DIGITAL TIMER WIRING 32440 070700 SERVICE Control Thermostat FIG 6 CONTROL THERMOSTAT Location The control thermostat is located behind the front panel FIG 6 to the left of the tank To test the control thermostat access will also needed to the tank heater located in the top of the rewer Test Procedure 1 Disconnect the brewer from the power source 2 Check the vo
44. using and reinstall the knob BLK L1 see below BLK 1 see below jl FIG 15 WARMER SWITCH WIRING MODEL RT Left Rear BLK L1 to Warmer BLK1 to Left Front Warmer Switch RT Left Front BLK L1 to Warmer BLK1 to Left Rear Warmer Switch to Brew Station Warmer Switch RT Right Front BLKL1 to Warmer to Terminal Block to Brew Station Warmer Switch to Right Rear Warmer Switch RT Right Rear BLKL1 to Warmer to Right Front Warmer Switch 32440 070700 SERVICE Indicator Lamp s FIG 17 INDICATOR LAMP MODEL RT Location The indicator lamps are located beneath their associ ated warmers FIG s 16 and 17 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 3 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 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 Page 21 4 Disconnect the brewer from the power source If vol
45. 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 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 25 when reconnecting the wires TNT 4 w BLU to Timer r BLK to Indicator Lamp FIG 25 START SWITCH WIRING 32440 070700 SERVICE cont Tank Heater QA ll FIG 26 TANK HEATER Location The tank heater is located on the tank lid FIG 26 Test Procedure 1 Check the voltage across the black and white or 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 heat
Download Pdf Manuals
Related Search