Bunn TB3Q-LP User's Manual
Contents
1. TE 2255 E TLI TL1 WHI to Power Cord 100 amp 120V or RED to Power Connector 230V and WHI to On Off Switch 100V 8 120 or RED to On Off Switch 230V TL2 WHI VIO to Brew Solenoid and WHI VIO to On Off Switch TL3 WHI ORN to Start Switch TL4 WHI GRN to Brew Solenoid TL5 WHI YEL to Start Switch P2037 FIG 5 DIGITAL TIMER WIRING 37236 050305 SERVIGE cont CONTROL THERMOSTAT FIG 6 CONTROL THERMOSTAT Location The control thermostat is located inside hood on the right side Test Procedures 1 Disconnect the brewer from the power source 2 Locate the blue black wire on the control thermo Stat 3 With a voltmeter check the voltage across the blue black wire on the control thermostat and the white wire on the tank heater for 100 volt and 120 volt two wire models or red wire on the tank heater for 230 volt two wire models Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models b 230 volts ac for two wire 230 volt models c 100 volts ac for two wire 100 volt models 4 Disconnect the brewer from the power source If voltage is present as described proceed to 5 If voltage is not present as described refer to the wir ing diagrams and check the brewer wiring harness 5 Locate the black wire on the co2. 1530 TB3Q LP OPERATING amp SERVICE MANUAL BUNN O MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 FAX 217 529 6644 37236 0000C 05 05 2004 Bunn O Matic Corporation www bunnomatic com CONTENTS User Notices 3 Electrical amp Plumbing Requirement 4 Initial Set 5 Auto Sweetener 1 6 Adjusting Brew Volumes 7 Operating 555 8 saa E maia 8 Auto Sweetener 8 188 81 t 9 Troubleshooting mneneneneaneneamennenenenm mean 10 SAD A DD 15 MA AE akan 26 INTRODUGTION This eguipment will brew a three gallon batch of fresh tea into an awaiting dispenser The tea will be dispensed at approximately room temperature to conserve ice The brewer is only for indoor use on a sturdy counter or shelf BUNN O MATIG COMMERCIAL PRODUCT WARRANTY Bunn O Matic Corp BUNN warrants equipment manufactured by it as follows 1 All equipment other than as specified below 2 years parts and 1 year labor 2 Electronic circuit and or control boards parts and labo
3. See page 24 Check the manufacturers warranty for additional information on test ing and replacement of a defective pump 37236 050305 TROUBLESHOOTING cont PROBLEM Dripping from sprayhead Water flows into tank continuously ON OFF Switch ON UNSWEET OFF SWEET Switch in UNSWEET or SWEET position Water flows into tank continuously ON OFF Switch OFF UNSWEET OFF SWEET Switch in OFF position Beverage overflows dispenser Weak beverage PROBABLE CAUSE 1 Syphon System 2 Lime Build up CAUTION Tank and tank compo nents should be delimed regularly depending on local water condi tions Excessive mineral build up on stainless steel surfaces can ini tiate corrosive reactions resulting in serious leaks 3 Brew Solenoid Valve 1 Brew Timer 1 Brew Solenoid Valve 1 Dispenser 2 Brew Timer 3 Brew Solenoid Valve 1 Filter Type 2 Tea 3 Sprayhead Page 13 REMEDY The brewer must be level or slightly lower in front to syphon properly Inspect the tank assembly for ex cessive lime deposits Delime as required Refer to Service Brew Solenoid Valve for testing procedures See page 16 Refer to Service Brew Timer for testing procedures See page 17 Refer to Service Brew Solenoid Valve for testing procedures See page 16 Or 24 The dispenser must be completely empty before starting a brew cycle Refer to Service Brew Timer for testing procedures See page
4. to verify that the desired volume has been achieved To decrease a batch size Press and release the START or BREW switch once for every two second interval to be removed from the total brew time period then immediately press and hold down the START or BREW switch until three clicks are heard Release the switch Failure to release the switch within two seconds after the third click causes the volume setting to be aborted and previous volume setting will remain in memory Allow the brew cycle to finish in order to verify that the desired volume has been achieved 2 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 liguid being dispensed When the desired level is reached turn the ON OFF UNSWEET OFF SWEET switch to OFF The brewer remembers this volume and will continue to brew batches of this size until the volume setting procedure is repeated NOTE When brewing tea batch volumes will decrease due to absorption by the tea leaves 3 Setting programming disable feature If it becomes necessary to prevent anyone from changing brew times once programmed you can set the SET
5. 17 Remove the Brew Solenoid Valve and clean any obstruction Rebuild or replace the valve if necessary See page 16 BUNN paper filters must be used for proper extraction A sufficient quantity of fresh loose tea leaves should be used for proper extraction A clean stainless steel sprayhead must be used for proper extrac tion 37236 050305 TROUBLESHOOTING cont PROBLEM Weak beverage cont Dry tea leaves remain in the funnel Brewer is making unusual noises PROBABLE GAUSE 4 Funnel Loading 5 Water Temperature 6 Low Brew Water Volume 1 Funnel Loading 1 Solenoid s 2 Plumbing Lines 3 Water Supply 4 Tank Heater Page 14 REMEDY The BUNN paper filter must be centered in the funnel and the bed of tea leaves leveled by gentle shak ing Place an empty funnel on an empty dispenser beneath the sprayhead Initiate a brew cycle and check the water temperature immediately be low the sprayhead with a thermom eter The reading should not be less than 200 F 93 C Adjust the con trol thermostat to increase the wa ter temperature Replace if neces sary Adjust needle valve to achieve 76 oz water from the sprayhead To increase volume turn counter clockwise To decrease volume turn clockwise The BUNN paper filter must be centered in the funnel and the bed of tea leaves leveled by gently shak ing The nut on the solenoid s must be tight or it will vibrate durin
6. Measure the amount of sweetener dispensed and calculate if the volume needs to be increased or decreased Dilution cycle is usually between 3 to 3 1 2 minutes 10 If adjustment is needed turning the adjustment valve clockwise decreases the amount of sweetener dis pensed and turning the adjustment valve counterclockwise increases the amount of sweetener dispensed 11 After the desired volume has been set turn the water supply on 12 Reinstall the top lid lower and upper rear panels The brewer may now be returned to service Pag e 6 37236 050305 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 position 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
7. 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 this will take approximately ten seconds and then release the switch Failure to re lease the switch within two seconds from the third click causes the volume setting to be aborted View the level of the liquid being dispensed When the desired level is reached turn the ON OFF switch to OFF The brewer remembers this volume and will continue to brew batches of this size until the volume setting procedure is repeated Empty server s turn selector switch to positions that have yet to be set and repeat batch setting proce dure until all batch sizes are set NOTE When brewing coffee batch volumes will decrease due to absorption by the coffee grounds 32540 0000C 09 01 1999 Bunn O Matic Corporation 37236 050305 Page 3 ELECTRICAL REQUIREMENTS CAUTION The brewer must be disconnected from the power source until specified in nitial Set Up 120V model brewers require 2 wire grounded service rated 120 volts ac 15 amp single phase 60 Hz A model brewers require 2 wire grounded service rated 230 volts ac 10 amp single phase 50 Hz model brewers require 2 wire grounded service rated 100 volts ac 15 amp single phase 60 Hz WARNING If the power cord is ever damaged it must be replaced by the manufacturer or its service
8. a voltmeter check the voltage across the black wire and white wire on the selector switch 3 Connect the brewer to the power source The in dication must be a 120 volts ac for two wire 120 volt models b 230 volts ac for two wire 230 volt models c 100 volts ac for two wire 100 volt models 4 Disconnect the brewer from the power source If voltage is present as described proceed to 5 If voltage is not present as described refer to the Wir ing Diagrams and check the wiring harness Page 23 5 Disconnect the black and white wires from the center terminals 6 Disconnect the brown white and white violet wires from the right side terminals 7 Check for continuity across the center and right terminals in rows one through four when the switch is in the SWEET position If continuity is present as described replace the wires on the right side and proceed to 8 If continuity is not present as described replace the switch 8 Disconnect the white violet wires on the left side terminal 9 Checkforcontinuity across the center and left side terminals in rows one through four when the switch is in the UNSWEET position If continuity is present as described replace the wires the switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Remove the wires from the switch terminals 2 Compress the clips inside the hood and gently push the s
9. agent with a special cord available from the manufacturer or its service agent in order to avoid a hazard Proceed as follows Electrical Hook Up CAUTION Improper electrical installation will damage electronic components 1 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 top cover from the brewer Rotate the control thermostat knob fully counterclockwise to the OFF position and replace the top cover Connect the brewer to the power source 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 RO RON PLUMBING REOUIREMENTS These brewers must be connected to a cold water system with operating pressure between 20 and 90 psi 138 and 621 kPa from a 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 621kPa to reduce it to 50 psi 345 kPa The water inlet fitting is 4 flare NOTE Bunn O Matic recommends copper tubing for installations of less than 25 feet and 3 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 countertop Bunn O Matic does not recommend the use of a saddle valve to inst
10. clean empty brew funnel and server Be sure the server lid doesn t interfere with the flow of dilution water Insert a BUNNA filter into the funnel Pour the packet of loose fresh tea leaves into the filter Approximately three to five ounces is recommended for three gallons of beverage Level the bed of tea leaves by gently shaking Slide the funnel into the funnel rails until it stops Place the ON OFF switch in the ON position For brewers with a sweetener place the UNSWEET OFF SWEET switch the SWEET or UNSWEET position Momentarily press the START switch CAUTION The funnel contains hot liquids Remove funnel slowly 8 9 Carefully remove the brew funnel and discard the used filter when tea no longer drips from the funnel tip Place the ON OFF UNSWEET OFF SWEET switch in the OFF position to prevent a false start 10 Fresh tea is available at the faucet Pag e 9 37236 080504 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 eguipment should be performed only by gualified service person nel All electronic components have 120 240 volt ac and low voltage dc potential on their terminals Shorting of terminals or the application of external voltages m
11. employees of BUNN are not authorized to make modifications to this warranty or to make additional warranties that are binding on BUNN Accordingly statements by such individuals whether oral or written do not constitute warranties and should not be relied upon If BUNN determines in its sole discretion that the equipment does not conform to the warranty BUNN at its exclusive option 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 Page 2 37236 050305 USER NOTIGES Carefully read and follow all notices on the equipment and in this manual They were written for y
12. page 21 5 Start Switch Refer to Service Start Switch for testing procedures See page 22 Page 1 0 37236 050305 TROUBLESHOOTING cont PROBLEM Brew cycle will not start cont Water is not hot Dilution cycle will not start Inconsistent beverage level in dispenser PROBABLE CAUSE 6 Brew Timer 7 Brew Solenoid Valve 1 Limit Thermostat CAUTION Do not eliminate or by pass limit thermostat or thermal cut off Use only BOM replacement part 29329 0001 2 Control Thermostat 3 Tank Heater 1 ON OFF 2 Start Switch 1 Syphon System 2 Lime Build up CAUTION Tank and tank compo nents should be delimed regularly depending on local water condi tions Excessive mineral build up on stainless steel surfaces can ini tiate corrosive reactions resulting in serious leaks 3 Water Pressure Page 11 REMEDY Refer to Service Brew Timer for testing procedures See page 17 Refer to Service Brew Solenoid Valve for testing procedures See page 16 Refer to Service Limit Thermostat for testing procedures See page 20 Refer to Service Control Thermo stat for testing procedures See page 19 Refer to Service Tank Heater for testing procedures See page 25 Refer to Service ON OFF Switch for testing See page 21 Refer to Service Start Switch for testing procedures See page 22 The brewer must be level or slightly lower in front to syphon properly Inspect the tank assem
13. tube and bulb inside the tank are in a vertical position NOTE The capillary tube must be clear of any elec trical termination and not kinked 7 Fasten the new control thermostat to its bracket 8 Refer to Fig 7 when reconnecting the wires 9 Adjust the control thermostat as required BLK to Tank Heater 100 120V Thermal Fuse 230V BLU BLK to Limit Thermostat P2090 80 FIG 7 CONTROL THERMOSTAT TERMINALS 37236 080504 SERVICE cont LIMIT THERMOSTAT FIG 8 LIMIT THERMOSTAT Location The limit thermostat is located inside the hood on the tank lid Test Procedure 1 Disconnect the brewer from the power source and remove the black wire from the limit thermostat 2 With a voltmeter check the voltage across the black wire removed from the limit thermostat and the white wire or red wire on the tank heater ter minal Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models b 230 volts ac for two wire 230 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 reconnect the black wire and proceed to 4 If voltage is not present as described refer to the Wir ing Diagrams and check the wiring harness 4 Remove the blue black wire from the limit ther mostat Page 20 5 With a voltmeter check the voltage
14. FORM PLUG OR CORD SEE INSTRUCTIONS FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE FIRE OR SHOCK BREWER ENERGIZED UNLESS UNPLUGGED 32540 0000 BREWERS TIMER SETTING CAUTION Disconnect the power source from the brewer prior to the removal of any panel for the replacement or adjustment of any component NOTE Check that the brewer is connected to water supply the tank is properly filled and a funnel and server are in place prior to setting or modifying batch sizes 1 Modifying batch sizes To modify a batch volume first check that the SET LOCK switch is in the SET position on the circuit board If the brewer has a batch selector switch position it to the size to be changed To increase a batch size Press and hold the START or BREW switch until three clicks are heard Release the switch and then press it again one or more times Each time the switch is pressed two seconds are added to the brew time period Allow the brew cycle to finish in order to verify that the desired volume has been achieved To decrease a batch size Press and release the START or BREW switch once for every two second interval to be removed from the total brew time period then immediately press and hold down the START or BREW switch until three clicks are heard Release the switch Allow the brew cycle to finish in order to verify that the desired volume has been achieved 2 Setting batch sizes To set a batch volume first check that the
15. ITCH FIG 12 START SWITCH Location The start switch is located in the front of the hood above and to the right of the brew funnel Test Procedure 1 Disconnect the brewer from the power source 2 Remove the wires from all terminals 3 Check for continuity across the two terminals on the right side of the switch when it is held in the lower position Continuity must not be present across these terminals in the upper position Page 22 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 the wires from the switch terminals 2 Compress the clips inside the hood and gently push the switch through the opening 3 Push the new switch into the opening and spread the clips to hold the switch captive in the hood 4 Refer to Fig 13 when reconnecting the wires WHI YEL to Brew Timer TL5 WHI ORN to Brew Timer TL3 FIG 13 START SWITCH TERMINALS 37236 080504 SERVIGE cont UNSWEET OFF SWEET SWITCH Sweetner Option WA P3034 FIG 14 UNSWEET OFF SWEET SWITCH Location The UNSWEET OFF SWEET switch is located in the front of the hood above and to the left of the brew funnel Test Procedure 1 Disconnect the brewer from the power source 2 With
16. LOCK switch to the LOCK position This will prevent any program ming to be done until switch is once again placed in the SET position Pag e 7 37236 050305 OPERATING CONTROLS A ON OFF Switch ON Placing the switch in the left position allows the start switch to activate a timed brew cycle for three gallons of tea OFF Placing the switch in the right position stops the brew cycle 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 The switch should always be placed in this position after a brew cycle and whenever the brewer is unattended B Start Switch Starts a brew cycle when the ON OFF switch is in the ON position Starts a brew cycle when the UNSWEET OFF SWEET switch is in either the UNSWEET or SWEET position Models with Sweetener Only C OFF SELECTOR Switch Models with Sweetener Only UNSWEET Placing the switch in the left positional allows the start switch to activate a timed brew cycle for three gallons of tea without sweetener OFF Placing the switch in the middle position stops the brew cycle 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 The switch should always be placed in this position after a brew cycle and whenever the brewer is unattended SWEET Placing the switch in the right positional allows the sta
17. across the ex posed terminal of the limit thermostat and the white wire from the power cord or the red wire from the power connector Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models b 230 volts ac for two wire 230 volt models c 100 volts ac for two wire 100 volt models 6 Disconnect the brewer from the power source If voltage is present as described reconnect the blue black wire to the limit thermostat The limit thermo Stat is operating properly If voltage is not present as described replace the limit thermostat Removal and Replacement 1 Remove both wires from the limit thermostat ter minals 2 Carefully slide the limit thermostat out from un der the retaining clip 3 Carefully slide the new limit thermostat into the retaining clip 4 Refer to Fig 9 when reconnecting the wires BLU BLK to Control Thermostat BLK to Power Cord or Power Connector P1800 FIG 9 LIMIT THERMOSTAT TERMINALS 37236 080504 SERVIGE cont ON OFF SWITCH FIG 10 ON OFF SWITCH Location The ON OFF switch is located in the front of the hood above and to the left of the brew funnel Test Procedure 1 Disconnect the brewer from the power source 2 Remove the black and white violet wires from the switch terminals 3 With a voltmeter check the voltage across the black wire removed from the ON OFF switch and the white wire on th
18. all the brewer The size and shape of the hole made in the supply line by this type of device may restrict water flow This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International Inc BOCA and the Food Service Sanitation Manual of the Food and Drug Administration FDA Remove the shipping cap from the bulkhead fitting on the rear of the brewer Flush the water line and securely attach it to the bulkhead fitting on the rear of the brewer Turn on the water supply 1 2 3 NOTE TheFlow Control Strainer assembly is internal located inside the back panel Page 4 37236 050305 INITIAL SET UP CAUTION The brewer must be disconnected from the power source throughout the Initial Set Up except when specified in the instructions 1 Remove the top lid from the brewer 2 Rotate the control thermostat knob fully counterclockwise to the OFF position and replace the top lid 3 Insert an empty funnel into the funnel rails 4 Place an empty dispenser on the brewer base Be prepared to empty the dispenser during these initial Brew water temperature is factory set at 200 F 93 3 Areas of high altitude will require lowering this tempera steps ture to prevent boiling This chart should be used asa 5 Plug in the brewer place the ON OFF switch in the guide when readjusting the brew water temperature ON position SWEET UNSWEET posit
19. anel will allow access to the 750 GPM flow control valve Contents Brew Solenoid Valve 16 Digital Brew 17 Control 19 Limit Thermostat aane awane anune nean anae 20 ON OFF eaaa Ga ae gan 21 Start SWItCh 22 UNSWEET OFF SWEET Switch 23 UNSWEET OFF SWEET Solenoid 24 Tank Heater OTS AS At 25 Wiring 26 FIG 1 COMPONENT ACCESS Page 15 37236 050305 SERVICE cont BREW SOLENOID VALVE FIG 2 BREW SOLENOID VALVE Location Viewing the brewer from the top the brew sole noid valve is mounted on the right side of the brewer Test Procedures 1 Disconnect the brewer from the power source 2 Disconnect the white violet and white green wires from the solenoid valve With the ON OFF switch in the ON position UNSWEET or SWEET po sition for brewers with sweetener option press the start switch 3 With a voltmeter check the voltage across the white violet and white green wires Connect the brewer to the power Source The indication must be a 120 volts ac for two wire 120 volt models b 230 volts ac for two wire 230 volt models c 100 volts ac for two wire 100 volt models 4 Disconnect the b
20. ay result in board failure Intermittent operation of electronic circuit boards is unlikely Board failure will normally be permanent If an intermittent condition is encountered the cause will likely be a switch contact or a loose connection at a terminal or crimp Solenoid removal requires interrupting the water supply to the valve Damage may result if solenoids are energized for more than ten minutes without a supply of water The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened This will help to avoid twists and kinks in the tubing Make certain that all plumbing connections are sealed and electrical connections tight and isolated This brewer is heated at all times Keep away from combustibles WARNING e Exercise extreme caution when servicing electrical equipment e Unplug the brewer when servicing except when electrical tests are specified Follow recommended service procedures e Replace all protective shields or safety notices Problem Probable Cause Remedy Brew cycle will not start 1 No water Water lines and valves to the brewer must be open 2 No power or incorrect voltage to Check circuit breakers fuses the brewer Strainer Flow Control 750 Direction of flow arrow must be GPM pointing upwards in the brewer B Remove the strainer flow con trol and check for obstructions Clear or replace 4 ON OFF Refer to Service ON OFF Switch for testing See
21. bly for ex cessive lime deposits Delime as required The water pressure to the brewer must be at least 20 psi 138 kPa 37236 050305 TROUBLESHOOTING cont PROBLEM Consistently high or low beverage level in the dispenser Spitting or excessive steaming Drip out time too long Sweetener is not working PROBABLE CAUSE 1 Strainer Flow Control 750GPM 1 Lime Build up CAUTION Tank and tank compo nents should be delimed regularly depending on local water condi tions Excessive mineral build up on stainless steel surfaces can ini tiate corrosive reactions resulting in serious leaks 2 Control Thermostat 1 Funnel Tip 1 Sweetener box is empty 2 Flow Adjustment screw is closed 3 Solenoid is defective 4 The Pump is defective Page 12 REMEDY A Direction of flow arrow must be pointing upwards in the brewer B Remove the strainer flow con trol and check for obstructions Clear or replace Inspect tank assembly for excessive lime deposits Delime as required Refer to Service Control Thermo Stat for testing procedures See page 19 The brew funnel should be cleaned thoroughly before each brew cycle to lessen the chance of tea leaf par ticles clogging the drip out tip Check the Sweetener box to make sure it is not out of product Check the Flow Adjustment screw to make sure the valve has not closed Refer to Service Sweetener Sole noid Valve for testing procedures
22. e 100 and 120 volt two wire and red wire on the 230 volt two wire remaining on the switch terminal 4 Connect the brewer to the power source The in dication must be a 120 volts ac for two wire 120 volt models b 230 volts ac for two wire 230 volt models c 100 volts ac for two wire 100 volt models Page 21 5 Disconnect the brewer from the power source If voltage is present as described proceed to 6 If voltage is not present as described refer to the Wir ing Diagrams and check the wiring harness 6 Check for continuity across the center and end terminals of the top row when the switch is in the ON position If continuity is present as described replace the wires the switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Remove the wires from the switch terminals 2 Compress the clips inside the hood and gently push the switch through the opening 3 Push the new switch into the opening and spread the clips to hold the switch captive in the hood 4 Refer to FIG 11 when reconnecting the wires BLK to Power Cord WHI VIO to On OffSwitth 07 00 WHI to Brew Timer TL2 or RED to Brew Timer TL2 WHI VIO to Brew JO Timer TL1 WHI VIO to On Off Switch FIG 11 ON OFF SWITCH TERMINALS 37236 080504 SERVICE cont START SW
23. e brew cycle to finish in order to verify that the de sired volume has been achieved 2 Setting brew volumes To set a brew volume first check that the SET LOCK switch is in the SET posi tion 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 set ting 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 NOTE Several ounces of water will continue to sy phon from the tank after turning the switch OFF The brewer remembers this volume and will continue to brew batches of this size until the volume setting procedure is repeated Page 18 NOTE When brewing tea volume will decrease due to absorption by the tea leaves 3 Setting programming disable feature If it becomes 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
24. eafter 14 Begin another brew cycle Empty the reservoir after water has stopped flowing from the funnel 15 Allow the water in the tank to heat to the proper temperature 16 The brewer is now ready to brew approximately 3 gallons of freshly brewed room temperature tea from three to five ounces of loose leaves Pag e 5 37236 050305 AUTO SWEETENER SET UP CAUTION The brewer must be disconnected from the power source throughout the Initial Set Up except when specified in the instructions 1 Remove the top lid and both rear panels 2 Make sure the brewer water supply is off 3 Connect sweetener hose from the bag in a box delivery system to the rear fitting marked Sweetener IMPORTANT System delivery pressure must be regulated between 30 40 psi System also needs to deliver product for at least 4 minutes without shutting off Some pump systems shut off after a few minutes of continu 015 running 4 Plug brewer into the power source 5 Place an empty reservoir under the dilution nozzle of the brewer 6 Close the adjustment valve on the rear of the brewer fully clockwise then open counterclockwise 1 2 turn 7 Setthe selector switch to the Sweetened side and press the Start switch momentarily The sweetener will come out immediately 8 Run sweetener for 1 minute then set selector switch to the Off position The flow will stop 9
25. eck the brewer wiring har ness Page 17 6 With a voltmeter check the voltage across termi nals TL1 and TL4 when the ON OFF switch is in the ON position Connect the brewer to the power source The indication must be 0 volts If voltage is as described proceed to 7 If voltage is not as described disconnect the brewer from the power source and replace the timer 7 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 indica tion must be as follows a 120 volts ac for two wire 120 volt models b 230 volts ac on two wire 230 volt models c 100 volts ac for two wire 100 volt models If voltage is present as described the brew timer is Operating properly Reset the timer as required to obtain the desired brew volume If voltage is not present as described disconnect the brewer from the power source and replace the timer Removal and Replacement 1 Remove the two 8 32 screws securing circuit board to the mounting bracket 2 Remove circuit board and spacers as required 3 Remove all wires from the timer 4 Attach all wires to the replacement timer board prior to installation to the component mounting bracket Refer to FIG 5 when reconnecting the wires 5 Install new circuit board with spacers as re quired to the hood 6 Adjust the timer as described below Ti
26. ed head screws hold ing the solenoid valve to the mounting bracket 7 Securely install the new solenoid valve to the mounting bracket 8 Attach the mounting bracket to the hood 9 Securely fasten the water lines to and from the solenoid valve 10 Refer to the Fig 3 when reconnecting the wires WHI VIO to Brew Timer TL1 WHI GRN to Brew Timer TL4 BREW SOLENOID P2843 FIG 3 SOLENOID VALVE TERMINALS 37236 080504 SERVIGE cont DIGITAL BREW TIMER a lt AN FIG 4 DIGITAL BREW TIMER Location The timer is located inside the hood on the left side 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 Disconnect the brewer from the power source and remove the top cover 2 Remove the two 8 32 screws securing circuit board to the mounting bracket 3 Remove circuit board and spacers as required 4 With a voltmeter check the voltage across termi nals TL1 and TL2 when the ON OFF switch is in the ON position Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models b 230 volts ac for two wire 230 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 6 voltage is not present as described refer to the Wiring Diagrams and ch
27. es BLK to Control 5 Thermostat WHI to Power Cord 100 120V or RED to Thermal Fuse 230V in FIG 19 TANK HEATER TERMINALS 37236 050305 SCHEMATIC WIRING DIAGRAM OPTIONAL READY INDICATOR GREEN N 3 LIMIT THERMOSTAT TANK HEATER BLK ri BLK ri BLU BL WHI WHI KEEP WARM HEATER wel BLK WHI i BREW 20 WHI ORA 1 immer Jen 2 9 5 WHIYEL 120 VOLTS AC 2 WIRE SINGLE PHASE SCHEMATIC WIRING DIAGRAM W SWEETENER OPTIONAL READY INDI KA 1 GREEN NZ N THERMOSTAT E BLK Te WHI ol OA 0 0 ga KEEP WARM HEATER UNSWEE TOE SWEET WHI gt BREW WHI VIO 60 BLK i WHI VIO 4 1 BREW 20 WHIORA T timer 10 WHIGRN 5 i WHI YEL z SWTNR ae BRN WHI sot WHI VIO AA 120 VOLTS 2 WIRE SINGLE PHASE 37236 080504 Page 26 SCHEMATIC WIRING DIAGRAM 7 GRN YEL SW amp 1 LIMIT THERMAL THERMAL THERMOSTAT 0 2 THERMOSTAT FIJSE FUSE TTT TT SATTUS rr SASSI 230 VOLTS AC 2 WIRE SINGLE PHASE Page 27 37236 050305
28. g opera tion Plumbing lines should not be rest ing on the counter top A The brewer must be connected to a cold water line B Water pressure to the brewer must not exceed 90 psi 621 kPa Install a regulator if necessary to lower the working pressure to ap proximately 50 psi 345 kPa Remove and clean lime off the tank heater See page 25 37236 050305 SERVIGE 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 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 spe cifically states to plug in the brewer COMPONENT ACCESS WARNING Disconnect the brewer from the power source before the removal of any panel or the replace ment of any component All components are accessible by the removal of the top cover and rear inspection panel The top cover is attached with one 6 32 screw Removal of the top cover will allow access to ON OFF UNSWEET OFF SWEET switch START switch brew timer brew solenoid control thermostat limit ther mostat and tank heater The rear inspection panel is attached with six 8 32 screws Removal of the rear p
29. he so lenoid bracket to the mounting bracket 5 Lift out the valve and bracket 6 Remove the two 10 32 slotted head screws hold ing the solenoid valve to the mounting bracket 7 Securely install the new solenoid valve to the mounting bracket 8 Attach the solenoid valve and bracket to the mounting bracket 9 Securely fasten the sweetener and water lines to and from the solenoid valves 10 Refer to Fig 17 when reconnecting the wires WHI VIO to Brew Solenoid WHI VIO to Brew Timer TL1 BRN WHI to Selector Switch P2843 FIG 17 SOLENOID VALVE TERMINALS 37236 050305 SERVIGE cont TANK HEATER FIG 18 TANK HEATER Location The tank heater is located inside the tank and se cured to the tank lid Test Procedures 1 Disconnect the brewer from the power supply 2 With a voltmeter check the voltage across the black and white wires on 100 volt and 120 volt models or the black and red wires for 230 volt models Connect the brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models b 230 volts ac for two wire 230 volt models c 100 volts for two wire 100 volt models 3 Disconnect the brewer from the power source If voltage is present as described proceed to 4 voltage is not present as described refer to the Wiring Diagrams and check wiring harness 4 Disconnect the black wire and the white wire or red wire from the tank
30. heater terminals 5 Check for continuity across the tank heater termi nals continuity is present as described reconnect the wires the tank heater is operating properly continuity is not present as described replace the tank heater Page 25 NOTE If the tank heater remains unable to heat re move and inspect heater for cracks in the sheath Removal and Replacement 1 Disconnect the black wire and the white or red wire from the tank heater terminals 2 Remove sprayhead and the hex nut securing the sprayhead tube to the hood Set aside for reas sembly 3 Disconnect vent tube and water inlet tube 4 Remove the six 10 thread cutting screws secur ing the tank lid to the tank 5 Remove the tank lid with limit thermostat spray head tube tank heater and vent tube 6 Remove the two hex nuts securing the tank heater to the tank lid Remove tank heater with gaskets and discard 7 Install new tank heater with gaskets on the tank lid and secure with two hex nuts 8 Install tank lid with limit thermostat sprayhead tube tank heater and vent tube using six 10 thread cutting screws 9 Secure sprayhead tube to hood using a hex nut 10 Install sprayhead 11 Connect vent tube and water inlet tube to fitting 12 Reconnect the wires to the limit thermostat tank heater See limit thermostat section in this manual when reconnecting wires 13 Refer to Fig 19 when reconnecting the tank heater wir
31. ion for Altitude Boiling point Recommended brewers with a sweetener option and momentarily o waler water temperature press the START switch Water will flow into the tank Feet C and dispenser for three and one half minutes Empty the dispenser when this first cycle stops and press the START switch again Empty the dispenser when the second cycle stops and press the START switch once more During the third cycle the tank will fill to its capacity and the excess will flow from the funnel into the dispenser Empty the dispenser when this third cycle stops 6 Begin another brew cycle and measure the total wa ter volume from the dispenser It should be approxi mately 3 gallons and 12 ounces 396 ounces CON CENTRATE MACHINES WILL YIELD ONLY 76 07 7 If not adjust the timer as required See Adjusting Brew Volumes Start and measure another cycle Repeat steps 6 8 until the recommended total water volume is achieved 10 The concentrate valve is pre adjusted to deliver the correct ratio of brew water to dilution water 11 Unplug the brewer remove the top lid rotate the control thermostat knob fully clockwise to the ON posi tion and replace the top lid 12 Empty the dispenser 13 Plug in the brewer and wait for the water in the tank to heat to brewing temperature approximately 20 minutes Some water will drip from the funnel during this time this is due to expansion and should not occur ther
32. ltage is present as described proceed to 4 If voltage is not present as described refer to the Wir ing Diagrams and check the wiring harness 4 Remove both wires from the coil and check for continuity across the coil terminals If continuity is present as described reconnect the brown white and white violet wires and proceed to 5 Page 24 continuity is not present as described replace the solenoid valve 5 Check the solenoid valve for coil action Connect the brewer to the power source place the UNSWEET OFF SWEET switch in the SWEET po sition and momentarily place the start switch in the lower position and release At the start of a brew cycle listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts and at the end of the brew cycle when the plunger is released 6 Disconnect the brewer from the power source If the sound is heard as described and sweetener will not pass through the solenoid valve there may be a blockage in the sweetener line before or after the so lenoid valve or the solenoid valve may require inspec tion for wear and removal of particles If the sound is not heard as described replace the solenoid valve Removal and Replacement 1 Remove all wires from the solenoid valves 2 Turn off the sweetener supply to the brewer 3 Disconnect the water lines to and from the sole noid valves 4 Remove the two 8 32 keps nuts holding t
33. mer 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 37236 080504 SERVICE cont DIGITAL BREW TIMER cont To increase a brew volume place the ON OFF switch in the 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 volume setting to be aborted and pre vious 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 pre vious volume setting will remain in memory Allow th
34. ntrol thermostat 6 Gently remove the capillary bulb and grommet from the tank 7 With a voltmeter check the voltage across the black wire of the control thermostat and the white wire on the tank heater for 100 volt and 120 volt two wire models or red wire on the tank heater for 230 volt two wire models when the control ther mostat is turned fully clockwise Connect the Page 19 brewer to the power source The indication must be a 120 volts ac for two wire 120 volt models b 230 volts ac for two wire 230 volt models c 100 volts ac for two wire 100 volt models 8 Disconnect the brewer from the power source If voltage is present as described reinstall the capil lary tube into the tank to the line 5 5 above the bulb the control thermostat is operating properly If voltage is not present as described replace the ther mostat Removal and Replacement 1 Remove both wires from the control thermostat terminals 2 Remove the thermostat capillary bulb by firmly pulling up on the capillary tube at the tank lid This will disengage the grommet from the tank lid 3 Remove the 8 32 screw holding the control ther mostat to its bracket 4 Slide the grommet to the line 5 5 above the bulb on the new capillary tube 5 Insert the capillary 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 6 Carefully bend the capillary tube so that the
35. our protec tion All notices on the equipment should be kept in good condition Replace any unreadable or damaged labels 00831 0000 4 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 9 Electrically ground the chassis Follow national local electrical codes 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 THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE 00831 0000F 3 98 1998 BUNN O MATIC CORPORATION 03408 0000 REMOVE FUNNEL SLOWLY 00656 0000 This equipment is to be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International Inc BOCA and the Food Service Sanitation Manual of the Food and Drug Administration FDA 03537 0000 USE QUICK BREW FUNNEL 26371 0000 WATER INLET 26371 0001 SWEETENER INLET 37881 0000 NI A WARNING To reduce the risk of electric shock do not remove or open cover No user serviceable parts inside Authorized service personnel only Disconnect power before servicing 06064 0000 WARNING FILL WATER TANK BEFORE ENERGIZING DO NOT OVERLOAD CIRCUIT KEEP AWAY FROM COMBUSTIBLES DO NOT DE
36. r for 3 years 3 Compressors on refrigeration equipment 5 years parts and 1 year labor 4 Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis parts and labor for 3 years or 30 000 pounds of coffee whichever comes first These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the applicable warranty period This warranty does not apply to any equipment component or part that was not manufactured by BUNN or that in BUNN s judgment has been affected by misuse neglect alteration improper installation Operation improper maintenance or repair damage or casualty 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 EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE The agents dealers or
37. rewer from the power source If voltage is present as described proceed to 5 If voltage is not present as described refer to Wiring Diagrams and check brewer wiring harness 5 Check for continuity across the solenoid valve coil terminals continuity is present as described reconnect the white violet from the brew timer and white green wire from the brew timer Page 16 If continuity is not present as described replace the solenoid valve 6 Check the solenoid valve for coil action Connect the brewer to the power source With ON OFF switch in the ON position UNSWEET position for brewers with sweetener option press START switch and listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts 7 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 the solenoid valve or the solenoid valve may require inspection for wear and removal of waterborne particles If the sound is not heard as described replace the solenoid valve Removal and Replacement 1 Remove all wires from solenoid valve 2 Turn off the water supply to the brewer 3 Disconnect the water lines to and from the sole noid valve 4 Remove the two 79 32 keps nuts holding the mounting bracket to the hood 5 Lift out the bracket 6 Remove the two 10 32 slott
38. rt switch to activate a timed brew cycle for three gallons of tea with sweetener CLEANING CAUTION CLEAN AND SANITIZE YOUR ICED TEA BREWER DAILY 1 Remove and thoroughly clean the entire brew funnel The funnel tip and screen must be free from any tea particles or residue Reassemble the funnel 2 Unplug the brewer Remove and thoroughly rinse the sprayhead The holes must be open and clear of any mineral deposits Wipe the sprayhead panel clean with a damp cloth 3 Insert the deliming spring into the sprayhead fitting until no more than one inch is visible and move it in and out 5 or 6 times Reattach the sprayhead 4 Wash the entire outside surface of the brewer with a clean damp cloth CAUTION DO NOT KEEP BREWED ICED TEA OVERNIGHT THE SERVER MUST BE CLEANED DAILY AUTO SWEETENER CLEANING Remove the connector off of the bag in a box Place the end in a bucket of hot water 120 130 F Place an empty reservoir on the base under the dilution nozzle Set the selector switch to the Sweetened setting Press and release the Start switch Run three brew cycles in a row emptying the reservoir after each cycle When the three cycles have been completed hook the connector back up to the bag in a box system This will keep buildup from occurring in the system 12201 ON This procedure should be performed weekly or as needed to keep the system clear Page 8 37236 080504 7 TEA BREWING Begin each brew cycle with a
39. witch through the opening 3 Push the new switch into the opening and spread the clips to hold the switch captive in the hood 4 Refer to FIG 15 when reconnecting the wires BLK to Power Cord BRN WHI to Sweetener Sol WHT GRN to Brew Sol g a WHT to Power Cord P1763 FIG 15 UNSWEET OFF SWEET SWITCH TERMINALS 37236 050305 SERVICE cont SWEETNER SOLENOID VALVE IG 16 SWEETNER SOLENOID VALVE Location Viewing the brewer from the front the sweetener solenoid is mounted on the right side of the solenoid mounting bracket which is secured to the bottom base housing Test Procedure 1 Disconnect the brewer from the power source 2 With a voltmeter check the voltage across the brown white and white violet wires on the sweet ener solenoid terminals when the UNSWEET OFF SWEET switch is in the SWEET position and the start switch is momentarily placed in the lower position Connect the brewer to the power source After the approximate setting on the delay dial the indication must be a 120 volts ac for two wire 120 volt models b 230 volts ac for two wire 230 volt models c 100 volts ac for two wire 100 volt models remain for the approximate setting on the dilution dial and then return to its previous indication 3 Disconnect the brewer from the power supply If vo
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