Instruction/ maintenance manual of the product TU3 Bunn
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TU3 HOT LIQUID ! CAUTION 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 Introduction ..................................................................... 2 Warranty .......................................................................... 2 User Notices ...................................................
Page 3 10225 031804 00831.0000F 3/98 ©1988 BUNN-O-MA TIC CORPORATION READ THE ENTIRE OPERA TING MANU AL BEFORE BUYING OR USING THIS PR ODUCT THIS APPLIANCE IS HEA TED WHENEVER CONNECTED T O A POWER S.
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 240 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 INITIAL SET -UP (cont.) 29. If 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.
Page 7 10225 031804 AUTO SWEETENER SET -UP (cont.) 5. Plug brewer into the power sour ce. 6. Place an empty reservoir under the dilution nozzle of the brewer . 7. Close the adjustment valve on the rear of the brewer fully (clockwise), then open (counter clockwise) 1/2 turn.
Page 8 10225 031804 CLEANING (cont.) 2. 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.
Page 9 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 Service Department.
Page 10 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start (cont.) W ater is not hot Dilution cycle will not start 4. ON/OFF Switch 5. Start Switch 6. Brew Timer 7. Brew Solenoid Valve 8. Internal Flow control (.195 GPM) 1.
Page 11 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Dilution cycle will not start (cont.) Inconsistent beverage level in dis- penser Consistently high or low beverage level in the dispenser 4. Dilution Solenoid V alve 1. Internal Flow Control (.
Page 12 TROUBLESHOOTING (cont.) PROBLEM Spitting or excessive steaming Drip-out time too long Dripping from sprayhead W ater flows into tank continuously (ON/OFF Switch "ON") W ater flows into tank continuously (ON/OFF Switch "OFF") PROBABLE CAUSE 1.
Page 13 TROUBLESHOOTING (cont.) PROBLEM Beverage overflows dispenser W eak beverage PROBABLE CAUSE 1. Dispenser 2. Brew Timer 3. Brew Solenoid Valve 4. Dilution Timer 5. Dilution Solenoid V alve 1. Filter T ype 2. T ea 3. Sprayhead 4. Funnel Loading 5.
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 opera- tion. Plumbing lines should not be rest- ing on the counter top.
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 P1277.40 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.
Page 17 SERVICE (cont.) BREW TIMER (Early Models) FIG. 4 BREW TIMER P1276.40 Location: The brew timer is located in the hood. It consists of the left dial plate and circuit board.
Page 18 10225 071500 SERVICE (cont.) DIGIT AL BREW TIMER (Late Models) FIG. 6 DIGIT AL BREW TIMER P2202.40 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.
Page 19 10225 103000 To increase a brew volume, place the ON/OFF switch in the "ON" position, press and hold the ST ART switch until three clicks are heard.
Page 20 SERVICE (cont.) CONTROL THERMOST A T FIG. 8 CONTROL THERMOST A T P1276.40 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.
Page 21 SERVICE (cont.) DILUTION SOLENOID V AL VE FIG. 10 DILUTION SOLENOID V AL VE P1277.40 Location: Viewing the brewer from the rear the dilution so- lenoid is mounted on the center of the solenoid mount- ing bracket which is secured to the trunk base.
Page 22 SERVICE (cont.) DILUTION TIMER FIG. 12 DILUTION TIMER P1276.40 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.
Page 23 SERVICE (cont.) LIMIT THERMOST A T FIG. 14 LIMIT THERMOST A T P1276.40 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 24 Q U IC K BR E W SERVICE (cont.) ON/OFF SWITCH (SELECTOR SWITCH - OPTIONAL) FIG. 16 ON/OFF SWITCH P1187.40 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: Brewers W/Out Half Batch Option 1.
Page 25 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.
Page 26 ST ART SWITCH HOT LIQUID ! CAUTION FIG. 18 ST AR T SWITCH P1187.40 Location: The start switch is located in the front of the hood, above and to the right of the brew funnel. T est Procedure: 1. Disconnect the brewer from the power source. 2. Remove the wires from all four terminals.
Page 27 SERVICE (cont.) 10225 031804 Location: Viewing the brewer from the rear the sweetener solenoid is mounted on the right side of the solenoid mounting bracket which is secured to the trunk base. T est Procedure: 1. Disconnect the brewer from the power sour ce.
Page 28 SERVICE (cont.) T ANK HEA TER FIG. 23 T ANK HEA TER TERMINALS P1284 FIG. 22 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.
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Page 31 10225 021804 27432.0000D 02/04 © 1996 BUNN-O-MATIC CORPORATION BRN/WHI WHI/BLU WHI/VIO WHI WHI WHI/BLU WHI/YEL WHI/ORN SCHEMATIC WIRING DIAGRAM TU3 W/SWEETENER 120 VOLTS AC 2 WIRE SINGLE PHAS.
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An important point after buying a device Bunn TU3 (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 TU3 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 TU3 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn TU3 you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn TU3 will certainly help you make a decision on the purchase.
If you already are a holder of Bunn TU3, 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 TU3.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn TU3. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn TU3 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
