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Bunn TB3Q-LP manual

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Table of contents for the manual

  • Page 1

    TB3Q TB3Q-LP OPERA TING & SERVICE MANUAL BUNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 www .bunnomatic.com 37236.0000C 05/05 ©2004 Bunn-O-Matic Corporation[...]

  • Page 2

    Page 2 CONTENTS User Notices .................................................................... 3 Electrical & Plumbing Requirements ............................... 4 Initial Set-Up .................................................................... 5 Auto Sweetener Set-Up .................................................... 6 Adjusting Brew[...]

  • Page 3

    Page 3 W ARNING ! Fill water tank before turning - on - thermostat or connecting appliance to power source. Use only on a properly protected circuit capable of the rated load. Electrically ground the chassis. Follow national/local electrical codes. Do not use near combustibles. F AILURE TO COMPL Y RISKS EQUIPMENT DAMAGE, FIRE, OR SHOCK HAZARD READ [...]

  • Page 4

    Page 4 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power sour ce until specified in Initial 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&[...]

  • Page 5

    Page 5 INITIAL SET -UP CAUTION - The brewer must be disconnected from the power sour ce 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 counter clockwise to the "OFF" position and replace the top lid. 37236 050305 3. Insert an emp[...]

  • Page 6

    Page 6 37236 050305 AUTO SWEETENER SET -UP CAUTION - The brewer must be disconnected from the power sour ce 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 fit[...]

  • Page 7

    Page 7 ADJUSTING BREW VOLUMES CAUTION - Disconnect the power sour ce 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. Modifyi[...]

  • Page 8

    Page 8 OPERA TING 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 [...]

  • Page 9

    Page 9 37236 080504 TEA BREWING 1. Begin each brew cycle with a clean empty brew funnel and server . (Be sure the ser ver lid doesn’t inter fere with the flow of dilution water .) 2. Insert a BUNN® filter into the funnel. 3. Pour the packet of loose fresh tea leaves into the filter . Approximately three to five ounces is recommended for three ga[...]

  • Page 10

    Page 10 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 T echnical Ser vice Department. • Inspection, testing, and repair of electrical equipment should be performed only[...]

  • Page 11

    Page 11 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start (cont.) Water is not hot Dilution cycle will not start Inconsistent beverage level in dispenser 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 #29[...]

  • Page 12

    Page 12 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Consistently high or low beverage level in the dispenser Spitting or excessive steaming Drip-out time too long Sweetener is not working 1. Strainer/Flow Control (.750GPM) 1. Lime Build-up CAUTION - T ank and tank compo- nents should be delimed regularly depending on local water condi- ti[...]

  • Page 13

    Page 13 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[...]

  • Page 14

    Page 14 TROUBLESHOOTING (cont.) PROBLEM Weak beverage (cont.) Dr y tea leaves remain in the funnel Brewer is making unusual noises PROBABLE CAUSE 4. Funnel Loading 5. Water T emperature 6. Low Brew Water V olume 1. Funnel Loading 1. Solenoid(s) 2. Plumbing Lines 3. Water Supply 4. T ank Heater REMEDY The BUNN® paper filter must be centered in the [...]

  • Page 15

    Page 15 SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessar y . Refer to T roubleshooting 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[...]

  • Page 16

    Page 16 SERVICE (cont.) BREW SOLENOID V AL VE FIG. 2 BREW SOLENOID V AL VE P3046 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/O[...]

  • Page 17

    Page 17 SERVICE (cont.) DIGIT AL BREW TIMER FIG. 4 DIGIT AL BREW TIMER P3047 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 [...]

  • Page 18

    Page 18 SERVICE (cont.) TL1 - WHI to Power Cord (100V & 120V) or RED to Power Connector (230V) and WHI to On/Off Switch (100V & 120V) 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 FIG. 5 DIGIT AL TIMER WIRI[...]

  • Page 19

    Page 19 SERVICE (cont.) CONTROL THERMOST A T FIG. 6 CONTROL THERMOST A T P3047 Location: The control thermostat is located inside hood on the right side. Test Procedures: 1. Disconnect the brewer from the power sour ce. 2. Locate the blue/black wire on the control thermo- stat. 3. With a voltmeter , check the voltage across the blue/ black wire on [...]

  • Page 20

    Page 20 SERVICE (cont.) LIMIT THERMOST A T FIG. 8 LIMIT THERMOST A T P3047 Location: The limit thermostat is located inside the hood on the tank lid. T est 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 limi[...]

  • Page 21

    Page 21 SERVICE (cont.) ON/OFF SWITCH FIG. 10 ON/OFF SWITCH P3034 Location: The ON/OFF switch is located in the front of the hood, above and to the left of the brew funnel. T est Procedure: 1. Disconnect the brewer from the power sour ce. 2. Remove the black and white/violet wires from the switch terminals. 3. With a voltmeter , check the voltage a[...]

  • Page 22

    Page 22 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 inside the hood and gently push the switch through the opening. 3. Push the new switch int[...]

  • Page 23

    Page 23 FIG.15 UNSWEET/OFF/SWEET SWITCH TERMINALS P1763 37236 050305 SERVICE (cont.) UNSWEET/OFF/SWEET SWITCH (Sweetner Option) FIG. 14 UNSWEET/OFF/SWEET SWITCH P3034 Location: The UNSWEET/OFF/SWEET switch is located in the front of the hood, above and to the left of the brew funnel. T est Procedure: 1. Disconnect the brewer from the power sour ce.[...]

  • Page 24

    Page 24 37236 050305 SERVICE (cont.) SWEETNER SOLENOID V AL VE FIG. 16 SWEETNER SOLENOID V AL VE P3298 FIG. 17 SOLENOID V AL VE TERMINALS P2843 WHI/VIO to Brew Solenoid WHI/VIO to Brew Timer TL1 BRN/WHI to Selector Switch Location: Viewing the brewer from the front, the sweetener solenoid is mounted on the right side of the solenoid mounting bracke[...]

  • Page 25

    Page 25 SERVICE (cont.) T ANK HEA TER FIG. 18 T ANK HEA TER Location: The tank heater is located inside the tank and se- cured to the tank lid. T est 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[...]

  • Page 26

    Page 26 LIMIT THERMOSTAT BLU/BLK TANK HEATER "KEEP WARM" HEATER START L1 N BLK WHI BLK BREW TIMER WHI WHI GREEN WHI/YEL WHI/ORA BLK WHI/GRN WHI/VIO WHI BRN/WHI WHI/VIO WHI WHI SCHEMATIC WIRING DIAGRAM TB3Q W/SWEETENER 120 VOLTS AC 2 WIRE SINGLE PHASE THERMOSTAT SOL 1 2 3 4 5 SOL WHI/GRN WHI/VIO BREW SWTNR UNSWEET/OFF/SWEET (OPTIONAL) READ[...]

  • Page 27

    Page 27 37236 050305 SCHEMA TIC WIRING DIAGRAM TB3QA LIMIT THERMO S TAT S W1 BREW TIMER BLK BLK BLK BLU/BLK RED RED RED WHI WHI WHI/VIO WHI/VIO WHI/GRN WHI/GRN WHI/ORN L1 L2 GRN/YEL WHI/YEL 37234.0003A 11/04 © 2004 BUNN-O-MA TIC CORPORA TION 230 VOL TS AC 2 WIRE SINGLE PHASE S OL S W2 "KEEP WARM" HEA TER T ANK HEA TER THERMAL FU S E THER[...]