Bunn TB3Q Operating & Service Manual
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Bunn TB3Q Operating & Service Manual

Bunn corporation operating & service manual tb3q tb3q-lp
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TB3Q
TB3Q-LP
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
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

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  • Page 1 TB3Q TB3Q-LP OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION 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: Table Of Contents

    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;...

  • Page 3: User Notices

    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 #03409.0000 #00656.0000 #03537.0000 #26371.0000...

  • Page 4: Electrical & Plumbing Requirements

    " 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.

  • Page 5: Initial Set-Up

    CAUTION - The brewer must be disconnected from the power source throughout the Initial Set-Up, except when specified in the instructions. Remove the top lid from the brewer. Rotate the control thermostat knob fully counterclockwise to the "OFF" position and replace the top lid. Insert an empty funnel into the funnel rails.

  • Page 6: 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. Remove the top lid and both rear panels. Make sure the brewer water supply is off. 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.

  • Page 7: 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.

  • Page 8: 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.

  • Page 9: 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 three to five ounces is recommended for three gallons of beverage.

  • 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 Technical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only by qualified service person- nel.
  • Page 11 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.
  • Page 12 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.
  • Page 13 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.
  • Page 14 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.

  • Page 15: Service

    SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem. WARNING - Inspection, testing, and repair of electri- cal equipment should be performed only by qualified service personnel.

  • Page 16: Brew Solenoid Valve

    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.

  • Page 17: Digital Brew Timer

    SERVICE (cont.) DIGITAL BREW TIMER 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.
  • Page 18 SERVICE (cont.) DIGITAL BREW TIMER (cont.) To increase a brew volume, place the ON/OFF switch in the “ON” position, press and hold the START switch until three clicks are heard. Release the switch and press it again one or more times. (Failure to re- lease the switch within two seconds after the third click causes the volume setting to be aborted and pre- vious volume setting will remain in memory.) Each...

  • Page 19: Control Thermostat

    SERVICE (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.

  • Page 20: Limit Thermostat

    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.

  • Page 21: On/Off Switch

    SERVICE (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.

  • Page 22: Start Switch

    SERVICE (cont.) START SWITCH 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.

  • Page 23: Unsweet/Off/Sweet Switch

    SERVICE (cont.) UNSWEET/OFF/SWEET SWITCH (Sweetner Option) 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.

  • Page 24: Unsweet/Off/Sweet Solenoid

    SERVICE (cont.) SWEETNER SOLENOID VALVE FIG. 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.

  • Page 25: Tank Heater

    SERVICE (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.

  • Page 26: Wiring Diagrams

    SW. & THERMOSTAT THERMOSTAT BLU/BLK WHI/VIO WHI/VIO BREW WHI/ORA TIMER WHI/GRN WHI/YEL 120 VOLTS AC 2 WIRE SINGLE PHASE 37234.0001A 08/04 © 2004 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM TB3Q W/SWEETENER (OPTIONAL) READY INDICATOR BLU/BLK LIMIT THERMOSTAT THERMOSTAT BLU/BLK UNSWEET/OFF/SWEET WHI/VIO BREW...
  • Page 27 SCHEMATIC WIRING DIAGRAM SW. & LIMIT THERMOSTAT THERMOSTAT BLU/BLK WHI/VIO 230 VOLTS AC 2 WIRE SINGLE PHASE 37234.0003A 11/04 © 2004 BUNN-O-MATIC CORPORATION TB3QA THERMAL FUSE TANK HEATER "KEEP WARM" HEATER WHI/VIO WHI/GRN WHI/ORN BREW WHI/GRN TIMER WHI/YEL Page 27...

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