Manual - Webstaurant Store
Contents
1. OPERATING amp SERVICE MANUAL BUNN O MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 FAX 217 529 6644 37235 0000D 05 06 2004 Bunn O Matic Corporation www bunn com CONTENTS Ju dee de ROREM EROR 2 iEn NC 2 Eed ee 3 Electrical amp Plumbing Requirements 4 Initial Set Up E 5 Adjusting Brew VOMMMES dn aprile netta rias 6 Auto Sweetener Set up E 6 Operating Controls suse edm cases atendiendo tue 7 Cleaning BN EI RR RI ES 8 Auto Sweetener Cleaning 1r 8 E EE 8 lee ere DO E 9 SI RN M RE PP 15 Wiring Diagrams aisisseunsexdepnestesiQus tet korr teen 28 INTRODUCTION This equipment 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 0 MATIC 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 labor 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 0002. SOLENOID DILUTION SOLENOID FIG 9 SOLENOID VALVE TERMINALS 37235 080204 SERVICE cont DILUTION TIMER FIG 10 DILUTION TIMER Location The dilution timer is located inside the hood on the right side It consists of the dial plate with two dials and circuit board Test Procedure 1 Disconnectthe brewer from the power source and remove the wires from terminals TL3 TL4 amp TL5 of the timer and rotate both dials fully counter clockwise 2 With a voltmeter check the voltage across termi nals TL1 and TL2 when the ON OFF switch is in the ON position Connect the brewer to the power source The indication must be 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 proceed to 4 If voltage is not present as described refer to the Wir ing Diagrams and check the wiring harness 4 Check for continuity across the green and red black wires when the start switch is held in the lower position Page 21 If continuity is present as described reconnect the wires to terminals TL3 TL4 amp TL5 of the timer board and proceed to 75 If continuity is not present as described refer to the Wiring Diagrams and check the wiring harness 5 With a voltmeter check the voltage across termi nals TL1 and TL4 when the ON OFF switch is i
3. 37235 080204 TROUBLESHOOTING cont PROBLEM Dry tea leaves remain in the fun nel Brewer is making unusual noises Sweetener is not working PROBABLE CAUSE 1 Funnel Loading 1 Solenoid s 2 Plumbing Lines 3 Water Supply 4 Tank Heater 1 Sweetener box is empty 2 Flow Adjustment screw is closed 3 Solenoid is defective 4 The Pump is defective Page 14 REMEDY The BUNN paper filter must be centered in the funnel and the bed of grounds leveled by gently shak ing The nut on the solenoid s must be tight or it will vibrate during operation Plumbing lines should not be rest ing on the counter top A The brewer must be connected to a cold water line B Water pressure to the brewer must not exceed 90 psi 620 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 27 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 See page 26 Check the manufacturers warranty for additional information on test ing and replacement of a defective pump 37235 111904 SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessary Refer to Troublesh
4. FIG 6 DIGITAL BREW TIMER Location The timer is located in 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 Disconnectthe brewer from the power source and remove the front access panel 2 Remove the two 78 32 screws securing circuit board to the mounting bracket 3 Remove circuit board and spacers as required 4 Withavoltmeter checkthe voltage across terminals TL1 and TL2 when the ON OFF switch is in the ON position Connect the brewer to the power source The indication must be 120 volts ac for two wire 120 volt models b 230 volts ac for two wire 230 volt models 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 voltageis notpresentas described refertothe Wiring Diagrams and check the brewer wiring harness 6 Withavoltmeter checkthe voltage across terminals 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 Page 18 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 ter minals TL1 and TL4 when the ON OFF switch is in the ON position Connect the brewer to the p
5. the start switch in the lower position and release Listen carefully after the approximate setting on the delay dial in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts and after the approximate setting on the dilution dial repels the plunger 6 Disconnect the brewer from the power source If the sound is heard as described and water will not pass through the solenoid valve there may be a block age in the water line before or after the solenoid valve or the solenoid valve may require inspection for wear and removal of waterborne particles If the sound is not heard as described replace the solenoid valve Removal and Replacement Remove all wires from the solenoid valves Turn off the water supply to the brewer Disconnect the water lines to and from the sole noid valves 4 Remove the two 8 32 keps nuts holding the mounting bracket to the trunk base Lift out the 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 Attach the mounting bracket to the trunk base Securely fasten the water lines to and from the solenoid valves 10 Refer to Fig 9 when reconnecting the wires COSS en fo co WHI VIO to Dilution Solenoid WHI GRN to Brew Timer TL4 WHI VIO to Brew Solenoid WHI VIO to Brew Timer TL1 WHI BLU to Dilution OC BELLIS X a
6. dy 2 4 WHIVIO e E eau wan PUQU Hj WHI ORN 1 1 1 h BREW RED BLK GRN 230 VOLTS AC 2 WIRE SINGLE PHASE Page 30 37235 050205 L1 SCHEMATIC WIRING DIAGRAM TB3B W HALF BATCH OPTIONAL READY INDICATOR BLU 4 D jj BK LIMIT prd em THERMOSTAT THERMOSTAT MEC KC BLK d BLU BLK BLK WHI I I I 0 0 I I e e Le ose TANK HEATER WHI WHI KEEP WARM HEATER BLK 22 22 HALF OFF FULL SWITCH ee START SWITCH e 275 7 ME rU p E in Se J v4 LG i I LG 6 I K 6 I Swik Swib Sun 51710 SW2A SWB WHI VIO WHI VIO WHI PNK Eege WHIVIO WHIVIO d Ge d 11 eee gt p WHI LL itt WH gp BREW 3h WHI ORN IL UU RED BLK DILUTION TIMER WHI GRN II WHIBLU p Ese p GRN d 698 100 VOLTS AC 120 VOLTS AC BREW 2 WIRE SINGLE PHASE DILUTION Page 31 37235 050205
7. 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 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 tea batch volumes will decrease due to absorption by the tea grounds 3 Setting programming disable feature If it becomes necessary to prevent anyone from changing brew times once programmed you can set the SET LOCK switch to the LOCK position This will prevent any program ming to be done until switch is once again placed in the SET position Page 6 37235 050205 AUTO SWEETENER SET UP CAUTION The brewer must be disconnected from the power source
8. in the ON upper position 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 Remove all wires from solenoid valves Turn off the water supply to the brewer Disconnect the water lines to and from the sole noid valves 4 Remove the two 78 32 keps nuts holding the mounting bracket to the brewer base Lift out the bracket 6 Removethe two 710 32 slotted head screws hold ing the solenoid valve to the mounting bracket 7 Securely install the new solenoid valve to the mounting bracket Attach the mounting bracket to the brewer base Securely fasten the water lines to and from the solenoid valves 10 Refer to the Fig 3 when reconnecting the wires en fo co WHI VIO to Dilution Solenoid WHI GRN to Brew Timer TL4 wi WIIO to Brew Solenoid WHI VIO to Brew Timer TL1 WHI BLU to Dilution Timer TL4 DILUTION SOLENOID FIG 3 SOLENOID VALVE TERMINALS 37235 080204 SERVICE cont CONTROL THERMOSTAT FIG 4 CONT
9. 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 nitial Set Up PLUMBING REQUIREMENTS These brewers must be connected to a cold water system with operating pressure between 20 138 and 90 psi 620 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 620 kPa to reduce it to 50 psi 345 kPa The water inlet fitting is 1 4 flare NOTE Bunn O Matic recommends copper tubing for installations of less than 25 feet and for more than 25 feet from the 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 install the brewer The size and shape of the hole made in the supply line by this type of device may restrict water flow This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators I
10. of the liquid being dispensed When the desired level is reached turn the ON OFF switch 10 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 NOTE When brewing tea volume will decrease due to absorption by the tea grounds Page 19 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 O O TLS S aa GIG 5 EE 712 E a Ti o i O O TL1 WHI VIO to Dilution Timer and WHI VIO to ON OFF Switch TL2 WHI to Power Cord 100V amp 120V or RED to Power connector 230V and WHI to Dilution Timer 100V amp 120V or RED to Dilution Timer 230V TL3 WHI ORN to Start Switch TL4 WHI GRN to Brew Solenoid TL5 WHI YEL to Start Switch P2037 FIG 7 DIGITAL TIMER WIRING 37235 080204 SERVICE cont DILUTION SOLENOID VALVE FIG 8 DILUTION SOLENOID V
11. position Momentarily press the start switch Water will flow into the tank and will shut off after three minutes Press the start switch again During the second period the tank will fill to its capacity and the excess will flow from the funnel into the dispenser Place the ON OFF switch in the OFF position Disconnect the brewer from the power source and remove the top lid Rotate the control thermostat knob fully clockwise to the ON position and replace the top lid Brew water temperature is factory set at 200 F 93 3 C Plug in the brewer and wait for the water in the tank Areas of high altitude will require lowering this tempera minutes Some water will drip from the funnel during EE this time this is due to expansion and should not occur Altitude Boiling point Recommended thereafter of water water temperature Feet SE ag 4 Place an empty dispenser under the funnel Place the ON OFF switch in the ON position and press the start switch Empty the dispenser after water has stopped flowing from the funnel Allow the water in the tank to reheat to the proper temperature Place the ON OFF switch in the ON position and press the start switch Place the ON OFF switch in the OFF position im mediately after water stops flowing from the funnel Check the water volume in the dispenser It should be seventy six ounces If not unplug the brewer remove the top lid and adjust the timer on the left side of the ho
12. 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 Pushthe new switch into the opening and spread the clips to hold the switch captive in the hood 4 Referto FlG 17 when reconnecting the wires BLK to Power Cord 100V amp 120V Models WHI VIO to Dilution BLK to Power Connector Timer 230V Models WHI VIO WHI to Dilution Timer TL2 100V amp 120V Models RED to Dilution Timer 230V Models WHI VIO to Brew Timer TL1 P1282 FIG 17 ON OFF SWITCH TERMINALS 37235 050205 SERVICE cont UNSWEET OFF SWEET SWITCH Sweetner Option V d P3034 FIG 18 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 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 indication must be a 120 v
13. throughout the Initial Set Up except when specified in the instructions 1 Remove the top lid and rear panel 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 ous running 4 Setthe Delay knob on the dilution timer to the 3 minute setting The minimum delay setting 5 Plug brewer into the power source 6 Placean empty reservoir under the dilution nozzle of the brewer 7 Close the adjustment valve the rear of the brewer fully clockwise then open counterclockwise 1 2 turn 8 Setthe selector switch to the Sweetened side and press the Start switch momentarily After approximately 3 minutes the sweetener will come out of the dilution nozzle Run sweetener for 1 minute then set selector switch to the Off position The flow will stop 10 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 11 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 12 Se
14. ALVE Location Viewing the brewer from the rear the dilution sole noid is mounted on the center of the solenoid mount ing bracket which is secured to the trunk base Test Procedure 1 Disconnect the brewer from the power source 2 With a voltmeter check the voltage across the white blue and white violet wires on the dilution solenoid terminals when the ON OFF switch is in the ON position and the start switch is momen tarily 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 re main for the approximate setting on the dilution dial and then return to its previous indication 3 Disconnect the brewer from the power supply 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 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 white blue and white violet wires and proceed to 5 If continuity is not present as described replace the solenoid valve 5 Checkthe solenoid valve for coil action Hone G E 20 the brewer to the power source place the ON OFF switch in the ON position and momentarily place
15. BLE CAUSE 4 Dilution Solenoid Valve 1 Internal Flow Control 195 GPM 2 Syphon System 3 Lime Build up CAUTION Tank and tank compo nents should be delimed regularly depending on local water condi tions Excessive mineral build up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks 4 Water Pressure 1 Brew Timer Delay Timer 2 Strainer Flow Control 750GPM Page 11 REMEDY Refer to Service Dilution Solenoid Valve for testing procedures See page 20 A Direction of flow arrow must be pointing towards the check valve B Remove the flow control and check for obstruction Clear or replace 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 The water pressure to the brewer must be at least 20 psi 138 kPa With the ON OFF switch ON adjust the brew timer to achieve the rec ommended 76 oz of concentrate then the dilution timer to achieve a total of 396 oz for each three gal lon brew cycle 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 37235 080204 TROUBLESHOOTING cont PROBLEM Spitting or excessive steaming Drip out time too long Dripping from sprayhead Water flows into tank continu ously ON OFF Switch ON or UNSWEET O
16. FF SWEET Switch in UNSWEET or SWEET position Water flows into tank continu ously ON OFF Switch OFF or UNSWEET OFF SWEET Switch in OFF position PROBABLE CAUSE 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 initiate corrosive reactions resulting in serious leaks 2 Control Thermostat 1 Funnel Tip 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 initiate corrosive reactions resulting in serious leaks 3 Brew Solenoid Valve 1 Brew Timer 1 Brew Solenoid Valve Page 12 REMEDY Inspect tank assembly for excessive lime deposits Delime as required Refer to Service Control Ther mostat for testing procedures See page 17 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 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 18 Refer to Service Brew Solenoid Valve for testing proce
17. ROL THERMOSTAT Location The control thermostat is located inside hood on the right side just behind the dilution timer 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 75 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 control 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 Page 17 thermostat is turned fully clockwise 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
18. TB3 TB3B TB3 LP OPTIONAL READY INDICATOR 4 gp BLK SWITCH GRN SUN THERMOSTAT THERMOSTAT THERMOSTAT L BLK qu BLU BLK BLK Ne I Q O I I ef oe e ose TANK HEATER WHI WHI ON OFF SWITCH KEEP WARM HEATER WHI DILUTION TIMER 1549321 WHI VIO WHI VIO mmo dy WHIO SE gu wan E WHI ORN 1 1 1 h BREW RED BLK GRN 100 VOLTS AC 120 VOLTS AC 2 WIRE SINGLE PHASE Page 28 37235 053006 GRN WHI SCHEMATIC WIRING DIAGRAM W SWEETENER READY INDICATOR BLU BLKd 0 1 BLK K esd TANK HEATER WHI L1 LIMIT WEE BEK P 4 WHI KEEP WARM HEATER m BLK Ee SELECTOR SWITCH ruere T NSWEET OFF SWEET de 2 WHI VIO d e 4 WHI VIO BREW DILUTION TIMER ERARI WHI SIARTSWITCH WHI VIO WHI VIO e ge dup BRNAWHI C WHUYEL RED BLK GRN SWT TIMER REER WHI VIO wa III ae EIER EA E 2 a BREW WHI VIO EH WHI GRN 120 VOLTS AC 2 WIRE SINGLE PHASE 37235 050205 Page 29 SCHEMATIC WIRING DIAGRAM TB3A OPTIONAL READY INDICATO GRN YEL BLU ES BLK L1 LIMIT SC 7 THERMAL THERMAL THERMOSTAT mg 1 FUSE FUSE BLK da U BLK RED I Q O I I ese RA ofa TANK HEATER WHI WHI ON OFF SWITCH KEEP WARM HEATER E DILUTION TIMER 154921 0 WHI VIO
19. ase 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 37235 050205 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 B 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 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 An electrician
20. 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 Exercise extreme caution when servicing electrical equipment Unplug the brewer when servicing except when electrical tests are specified Follow recommended service procedures Replace all protective shields or safety notices 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 or fuses the brewer 3 Strainer Flow Control Direction of flow arrow must be 750GPM pointing upwards in the brewer B Remove the strainer flow con trol and check for obstructions Clear or replace Page 9 37235 050205 TROUBLESHOOTING cont PROBLEM Brew cycle will not start cont Water is not hot Dilution cycle will no
21. 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 26 If continuity is not present as described replace the solenoid valve 5 Check the solenoid valve for coil action Con nect the brewer to the power source place the UNSWEET OFF SWEET switch in the SWEET position 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 solenoid valve or the solenoid valve may require inspection 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 78 32 keps nuts holding the solenoid bracket to the mounting bracket Lift out the valve and bracket 6 Removethe two 710 32 slotted head screws hold ing the solenoid valve to the mounting bracket 7 Secure
22. dures See page 16 37235 050205 TROUBLESHOOTING cont PROBLEM Beverage overflows dispenser Weak beverage PROBABLE CAUSE 1 Dispenser n2 Brew Timer Brew Solenoid Valve A Dilution Timer Dilution Solenoid Valve Filter Type 2 Tea Sprayhead A Funnel Loading Water Temperature Page 13 REMEDY The dispenser must be complete ly empty before starting a brew cycle Refer to Service Brew Timer for testing procedures See page 18 Remove the Brew Solenoid Valve and clean any obstruction Rebuild or replace the valve if necessary See page 16 Refer to Service Dilution Timer for testing procedures See page 21 Refer to Service Dilution Solenoid Valve for testing procedures See page 20 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 The BUNN paper filter must be centered in the funnel and the bed of tea leaves leveled by gentle shaking Place an empty funnel on an empty dispenser beneath the sprayhead Initiate a brew cycle and check the water temperature immediately below the sprayhead with a ther mometer The reading should not be less than 200 F 93 C Adjust the control thermostat to increase the water temperature Replace if necessary
23. eam should stop approximately thirty seconds after the funnel discharge has stopped 29 H not unplug the brewer and remove the top lid 30 Adjust the delay knob of the timer on the right side of the hood as required Replace the top lid and plug in the brewer 31 Repeat steps 27 30 until the proper dilution timing is achieved 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 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
24. ect 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 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 rele
25. ide the hood and gently push the switch through the opening 3 Pushthe new switch into the opening and spread the clips to hold the switch captive in the hood 4 Referto Fig 15 when reconnecting the wires GRN to Dilution Timer TL5 WHI YEL to Brew Timer TL5 RED BLK to Dilu tion Timer TL3 WHI ORN to Brew Timer TL3 FIG 15 START SWITCH TERMINALS 37235 080204 SERVICE cont ON OFF SWITCH FIG 16 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 Brewers W Out Half Batch Option 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 remaining on the switch terminal 4 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 Page 24 If voltage is present as described proceed to 76 If voltage is not present as described refer to the Wir ing Diagrams and check the wiring harness 6 Check for continuity across the center and end
26. ly 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 19 when reconnecting the wires e WHI VIO to Brew Solenoid WHI VIO to Brew Timer TL1 BRN WHI to Selector Switch P2843 FIG 21 SOLENOID VALVE TERMINALS 37235 050205 SERVICE cont TANK HEATER P es FIG 22 TANK HEATER Location The tank heater is located inside the tank and secured 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 brew 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 proceed to 4 If voltage is not present as described refer to the Wir ing Diagrams and check wiring harness 4 Disconnect the black wire and the white wire or red wire from the tank heater terminals 5 Checkfor continuity across the tank heater termi nals If continuity is present as described reconnect the wires the tank heater is operating properly If c
27. 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 capillary tube into the tank to the line 4 5 above the bulb the control thermostat is operating properly If voltage is not present as described replace the thermostat 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 78 32 screw holding the control thermostat to its bracket 4 Slide the grommet to the line 4 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 tube and bulb inside the tank are in a vertical posi tion NOTE The capillary tube must be clear of any electri cal termination and not kinked 7 Fasten the new control thermostat to its bracket 8 Refer to Fig 5 when reconnecting the wires 9 Adjust the control thermostat as required SE BLK to Tank Heater S Js __ BLU BLK to Limit Ther mostat 80 d G 5 CONTROL THERMOSTAT TERMINALS 37235 080204 F SERVICE cont DIGITAL BREW TIMER wp SW
28. n the ONT position and the start switch is momentarily placed in the lower position Connect the brewer to the power source After a delay of approximately three minutes the indication must be a 120 volts ac for two wire 120 volt models for approximately one minute and then return to its previous indication b 230 volts ac for two wire 230 volt models for approximately one minute and then return to its previous indication C 100 volts ac for two wire 100 volt models for approximately one minute and then return to its previous indication 6 Disconnect the brewer from the power source If voltage is present as described the timer is operat ing properly Adjust the timer dials as required If voltage is not present as described replace the timer Removal and Replacement 1 Remove all wires from the timer 2 Remove the circuit board and dial plate from the brackets 4 Install the new dial plate and circuit board to the brackets Refer to Fig 11 when reconnecting the wires 6 Adjust the timer dials as required en WHI BLU to Dilution Solenoid RED BLK to Start Switch WHI to Brew Timer 100V amp r GRN to Start Switch 120V Models RED to Brew Timer 230V Models WHI VIO to ON OFF Switch FIG 11 DILUTION TIMER TERMINALS 37235 080204 SERVICE cont LIMIT THERMOSTAT FIG 12 LIMIT THERMOSTAT Location The limit thermostat is located inside the hood on the tank lid Te
29. nternational Inc BOCA and the Food Service Sanitation Manual of the Food and Drug Administration FDA For models installed outside the U S A you must comply with the applicable Plumbing Sanitation Code for your area 1 Remove the shipping cap from the bulkhead fitting on the rear of the brewer 2 Flush the water line and securely attach it to the bulkhead fitting on the rear of the brewer 3 Turn on the water supply NOTE TheFlow Control Strainer assembly is internal located inside the back panel Page 4 37235 050506 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 3 o N 10 11 12 13 14 15 16 17 Unplug the brewer and remove the top lid 19 20 Remove the top lid from the brewer Rotate the control thermostat knob fully counterclockwise to the OFF position and replace the top lid Set the delay knob of the timer on the right side of the hood at eight minutes and the dilution knob of the timer on the right side of the hood at three minutes and forty five seconds Remove the metal discharge tip from the funnel to speed up the set up procedure Insert the empty funnel into the funnel rails Place an empty dispenser on the brewer base Be sure the funnel discharge is directly above the hole in the dispenser top lid Plug in the brewer and place the ON OFF switch in the ON
30. od as required See Adjusting Brew Volumes Replace the top lid plug in the brewer start and measure another concentrate cycle Repeat steps 13 16 until the proper water volume is achieved Set the delay knob of the timer on the right side of the hood at three minutes and empty the dispenser Place the ON OFF switch in the ONT position momentarily press the start switch and allow both the con centrate and dilution cycles to occur Page 5 37235 050205 INITIAL SET UP cont 21 When all water stops flowing check the water volume in the dispenser It should be 396 ounces 22 H not unplug the brewer and remove the top lid 23 Adjust the dilution knob of the timer on the right side of the hood as required Replace the top lid plug in the brewer start and measure another brew cycle 24 Repeat steps 20 23 until the proper water volume is achieved 25 Return the delay knob of the timer on the right side of the hood to eight minutes Replace the top lid and plug in the brewer 26 Reinstall the metal discharge tip into the funnel 27 Load the funnel with a BUNN paper filter and approximately four ounces of loose tea leaves 28 Place the ON OFF switch in the ON position momentarily press the start switch and allow both the con centrate and dilution cycles to occur Observe the funnel discharge and the dilution streams near the end of the brew cycle The dilution str
31. of tea with sweetener Page 1 37235 050205 CLEANING CAUTION CLEAN AND SANITIZE YOUR ICED TEA BREWER DAILY 1 2 3 4 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 Place the ON OFF switch in the OFF position 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 Insert the deliming spring into the sprayhead fitting until no more than two inches is visible and move it in and out 5 or 6 times Insert the spring into the airvent hole in the sprayhead panel and move it in and out 5 or 6 times Reattach the sprayhead 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 egeo nmm 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 This procedure should be performed weekly o
32. olts 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 75 If voltage is not present as described refer to the Wir ing Diagrams and check the wiring harness Page 25 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 Check for continuity 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 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 Referto FlG 19 when reconnecting the
33. on a properly protected circuit capable of the rated load Electrically ground the chassis Follow national local electrical codes Do not use near combustibles FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE FIRE OR SHOCK HAZARD 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 37881 0000 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 P SS AA WARNING 03408 0000 A WARNING REMOVE FUNNEL SLOWLY 03409 0000 A WARNING LIQUID Page 3 00656 0000 This equipment must be installed to comply with the Basic Plumbing Code of the Building Offi cials and Code Administrators International Inc BOCA and the Food Service Sanitation Manual of the Food and Drug Administration FDA For models installed out side the U S A comply with the applicable Plumbing Sanitation Code 06064 0000 WARNING FILL WATER TANK BEFORE ENERGIZING DO NOT OVERLOAD CIRCUIT KEEP AWAY FROM COMBUSTIBLES DO NOT DEFORM PLUG OR CORD SEE INSTRUCTIONS FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE FIRE OR SHOCK BREWER ENERGIZED UNLESS UNPLUGGED 32540 0000 BREWERS TIMER SETTING CAUTION Disconn
34. ontinuity is not present as described replace the tank heater Page 27 NOTE If the tank heater remains unable to heat remove 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 4 Remove the six 10 thread cutting screws securing 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 hex nut 10 Install sprayhead 11 Connect vent tube to fitting 12 Reconnect the wires to the limit thermostat tank heater See limit thermostat section in this manual when reconnecting wires 13 Referto Fig 23 when reconnecting the tank heater wires amp 120V Models RED to Power Connector 230V Models WHI to Power Cord 100V BLK to Control Thermostat E A FIG 23 TANK HEATER TERMINALS 37235 080204 SCHEMATIC WIRING DIAGRAM
35. ooting 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 specifically 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 76 32 screw Removal of the top cover will allow access to ON OFF switch start switch brew timer dilution timer control thermostat limit thermostat and tank heater The rear inspection panel is attached with six 28 32 screws Removal of the rear panel will allow access to the brew solenoid valve dilution solenoid valve and the sweetener solenoid valve optional 195 GPM amp 750 GPM flow control and check valves Contents Brew Solenoid Valve 16 Control Themoetat cece cesses eenen 17 Digital Brew TE 18 Dilution TIMET ND T 20 Dilution Solenoid Valve 21 Limit tte iiie treten tee tionen 22 Start Switch sse 23 ON OFF HE aieo eene ele ui AE 24 UNSWEET OFF SWEET Switch 25 S
36. ot 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 37235 050205 USER NOTICES Carefully read and follow all notices on the equipment and in this manual They were written for your pro tection All notices on the equipment should be kept in good condition Replace any unreadable or damaged 00831 0000 AWARNING Fill water tank before turning on thermostat or connecting appliance to power source Use only
37. ower source and press the START switch The indication must be as follows 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 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 78 32 screws securing circuit board to the hood 2 Remove circuit board and spacers as required 3 Remove all wires from the timer 4 Attach all wires to the replacement timer board prior to installation to the component mounting bracket Refer to FIG 7 when reconnecting the wires 5 Install new circuit 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 37235 080204 SERVICE cont DIGITAL BREW TIMER cont To increase a brew volume place the ON OFF switch in the ON position
38. 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 or 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 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 n
39. 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 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 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
40. r as needed to keep the system clear Nom oP TEA BREWING Begin each brew cycle with a clean empty brew funnel and server Be sure the server lid doesn t interfere with the flow of dilution water Insert a BUNN filter into the funnel Pour the packet of loose fresh tea leaves into the filter Approximately four ounces is recommended 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 Momentarily press the start switch CAUTION The funnel contains hot liquids Remove funnel slowly 8 g Carefully remove the brew funnel and discard the used filter when tea no longer drips from the funnel tip Place the ON OFF switch in the OFF position to prevent a false start 10 Fresh tea is available at the faucet Page 8 37235 080204 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 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 may result in board failure Intermittent operation of electronic circuit
41. res from the limit thermostat terminals 2 Carefully slide the limit thermostat out from under the retaining clip 3 Carefully slide the new limit thermostat into the retaining clip 4 Referto Fig 13 when reconnecting the wires BLU BLK to Control Thermostat BLK to Power Cord or Power Connector P1800 FIG 13 LIMIT THERMOSTAT TERMINALS 37235 050205 SERVICE cont START SWITCH FIG 14 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 four 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 If continuity is present as described proceed to 4 If continuity is not present as described replace the switch Page 23 4 Check for continuity across the two terminals on the left side of the switch when it is held in the lower position Continuity must not be present across these terminals in the upper position If continuity is present as described reconnect the wires the switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Remove the wires from the switch terminals 2 Compress the clips ins
42. st 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 terminal 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 22 5 With a voltmeter check the voltage across the exposed 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 thermostat is operating properly If voltage is not present as described replace the limit thermostat Removal and Replacement 1 Remove both wi
43. t start PROBABLE CAUSE 4 ON OFF Switch 5 Start Switch 6 Brew Timer 7 Brew Solenoid Valve 8 Internal Flow control 195 GPM 1 Limit Thermostat CAUTION Do not eliminate or bypass limit thermostat or thermal cut off Use only BOM replacement part 29329 0001 2 Control Thermostat 3 Tank Heater 1 ON OFF Switch 2 Start Switch 3 Dilution Timer Page 10 REMEDY Refer to Service ON OFF Switch for testing See page 24 Refer to Service Start Switch for testing procedures See page 23 Refer to Service Brew Timer for testing procedures See page 18 Refer to Service Brew Solenoid Valve for testing procedures See page 16 A Direction of flow arrow must be pointing towards check valve B Remove the flow control and check for obstructions Clear or replace Refer to Service Limit Thermostat for testing procedures See page 22 Refer to Service Control Ther mostat for testing procedures See page 17 Refer to Service Tank Heater for testing procedures See page 27 Refer to Service ON OFF Switch for testing procedures See page 24 Refer to Service Start Switch for testing procedures See page 23 Refer to Service Dilution Timer for testing procedures See page 21 37235 080204 TROUBLESHOOTING cont PROBLEM Dilution cycle will not start cont Inconsistent beverage level in dispenser Consistently high or low beverage level in the dispenser PROBA
44. t the Delay knob on the dilution timer back to the 6 to 7 minute setting 13 After the desired volume has been set turn the water supply on 14 Reinstall the top lid and rear panel The brewer may now be returned to service 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 C UNSWEET OFF SWEET 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 start switch to activate a timed brew cycle for three gallons
45. weetner 26 Tank 2 2 20221 27 Wiring HIE 28 37235 050205 SERVICE cont BREW SOLENOID VALVE FIG 2 BREW SOLENOID VALVE Location Viewing the brewer from the rear the brew sole noid valve is mounted on the left side of the mounting bracket 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 upper position 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 brewer 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 Checkfor continuity across the solenoid valve coil terminals If continuity is present as described reconnect the white violet from the ON OFF switch 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
46. wires BLK to Power Cord BRN WHI to Sweetener Sol WHT GRN to Brew Sol ie a WHT to Power Cord P1763 FIG 19 UNSWEET OFF SWEET SWITCH TERMINALS 37235 050205 SERVICE cont Fs P3298 FIG 20 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 voltage 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
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