Instruction/ maintenance manual of the product TB3Q Bunn
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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 .
Page 2 CONTENTS User Notices .................................................................... 3 Electrical & Plumbing Requirements ............................... 4 Initial Set-Up ...............................................................
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.
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.
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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.
Page 15 SERVICE This section provides procedures for testing and replacing various major components used in this brewer should service become necessar y .
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.
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.
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.
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.
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.
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.
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.
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.
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/W.
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.
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 WIRI.
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.
An important point after buying a device Bunn TB3Q (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bunn TB3Q yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bunn TB3Q - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn TB3Q you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn TB3Q will certainly help you make a decision on the purchase.
If you already are a holder of Bunn TB3Q, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bunn TB3Q.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn TB3Q. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn TB3Q along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
