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TU3
!
CAUTION
HOT
LIQUID
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
10225.0000N 03/04 ©1987 Bunn-O-Matic Corporation
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CONTENTS Introduction .....................................................................2 Warranty ..........................................................................2 User Notices ....................................................................3 Electrical & Plumbing Requirements ...............................4 Initial Set-Up ....................................................................5 Adjusting Brew Volumes ..................................................6 Auto Sweete
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USER NOTICES Carefully read and follow all notices on the equipment and in this manual. They were written for your protec- tion. All notices on the equipment should be kept in good condition. Replace any unreadable or damaged labels. #00831.0000 ! WARNING 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 natinal/local electrical codes. Do not use near
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ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source 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. "B" model brewers require 2-wire, grounded service rated 100 volts ac, 15 amp, single phase, 60 Hz. Proceed as follows: Electrical Hook-Up CAUTION – Improper electrical install
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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. Remove the top lid from the brewer. 2. Rotate the control thermostat knob fully counterclockwise to the "OFF" position and replace the top lid. 3. 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. 4. Remove th
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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. 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
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AUTO SWEETENER SET-UP (cont.) 5. Plug brewer into the power source. 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 (counterclockwise) 1/2 turn. 8. Set the selector switch to the "Sweetened" side and press the "Start" switch momentarily. (After approxi- mately 3 minutes the sweetener will come out of the dilution nozzle.) 9. Run sweetener for 1 minute, then set selector switch to the "Off" p
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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. Wipe the sprayhead panel clean with a damp cloth. 3. 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. 4. Wash the entir
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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 volt ac and low voltage dc potential on their terminals. Shorting of terminals or the ap
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start (cont.) 4. ON/OFF Switch Refer to Service - ON/OFF Switch for testing. See page 24 5. Start Switch Refer to Service - Start Switch for testing procedures. See page 26 6. Brew Timer Refer to Service - Brew Timer for testing procedures. See page 17 or 18 7. Brew Solenoid Valve Refer to Service - Brew Solenoid Valve for testing procedures. See page 16 8. Internal Flow control (.195 GPM) (A) Direction of flow arrow mus
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Dilution cycle will not start (cont.) 4. Dilution Solenoid Valve Refer to Service - Dilution Solenoid Valve for testing procedures. See page 21 Inconsistent beverage level in dis- 1. Internal Flow Control (.195 GPM) (A) Direction of flow arrow must be penser pointing towards the brewer. (B) Remove the flow control and check for obstruction. Clear or re- place. 2. Syphon System The brewer must be level or slightly lower in front to syphon prop
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Spitting or excessive steaming 1. Lime Build-up Inspect tank assembly for excessive lime deposits. Delime as required. 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 ini- tiate corrosive reactions resulting in serious leaks. Refer to Service - Control Thermo- 2. Control Thermostat stat for testing procedures. See page 20 Drip-ou
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Beverage overflows dispenser 1. Dispenser The dispenser must be completely empty before starting a brew cycle. 2. Brew Timer Refer to Service - Brew Timer for testing procedures. See page 17 or 18 3. Brew Solenoid Valve Remove the Brew Solenoid Valve and clean any obstruction. Rebuild or replace the valve if necessary. See page 16 4. Dilution Timer Refer to Service - Dilution Timer for testing procedures. See page 22 5. Dilution Solenoid Val
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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY ® Dry tea leaves remain in the funnel 1. Funnel Loading The BUNN paper filter must be centered in the funnel and the bed of grounds leveled by gently shak- ing. Brewer is making unusual noises 1. Solenoid(s) The nut on the solenoid(s) must be tight or it will vibrate during opera- tion. Plumbing lines should not be rest- 2. Plumbing Lines ing on the counter top. (A) The brewer must be connected 3. Water Supply to a cold water line. (B) Water
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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. The brewer should be disconnected ! CAUTION from the power source when servicing, except when HOT LIQUID electrical tests are required and the test
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SERVICE (cont.) If continuity is not present as described, replace the solenoid valve. BREW SOLENOID VALVE 6. Check the solenoid valve for coil action. Connect the brewer to the power source. With ON/OFF switch 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 val
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SERVICE (cont.) 5. With a voltmeter, check the voltage across termi- BREW TIMER (Early Models) nals TL1 and TL4 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. The indication must be: a) 120 volts ac for two wire 120 volt models for approximately twenty seconds and then return to its previous indication. b) 240 volts ac for two wire 240 volt models for approximately twenty seconds and then
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SERVICE (cont.) DIGITAL BREW TIMER (Late Models) If voltage is as described, proceed to #7. 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 termi- nals TL1 and TL4 when the "ON/OFF" switch is in the "ON" position. Connect the brewer to the power source and press the "START" switch. The indica- tion must be as follows: a) 120 volts ac for two wire 120 volt models. b) 240 volts ac for two wire 240 volt
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SERVICE (cont.) DIGITAL BREW TIMER (Late Models) (cont.) To increase a brew volume, place the ON/OFF 3. Setting programming disable feature. If it be- switch in the "ON" position, press and hold the START comes necessary to prevent anyone from changing switch until three clicks are heard. Release the switch brew time once programmed, you can set the SET/ and press it again one or more times. (Failure to re- LOCK switch to the "LOCK" position. This will prevent lease the switch within two seconds
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SERVICE (cont.) mostat is turned fully clockwise. Connect the brewer to the power source. The indication must CONTROL THERMOSTAT be: a) 120 volts ac for two wire 120 volt models. b) 240 volts ac for two wire 240 volt 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 capil- lary tube into the tank to the line 4.5" above the bulb, the control thermostat is operating properly. If voltage is not pre
