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Bunn T3 - page 1
BUNN-O-MA TIC CORPORA TION T3,T3A T6,T6A POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 TELEPHONE: (217) 529-6601 FAX: (217) 529-6644 10145.0000G 7/00 © 1984 Bunn-O-Matic Corporation OPERA TING & SER VICE MANU AL BU N N ® ...
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Bunn T3 - page 2
Page 2 CONTENTS Introduction ............................................................................. 2 Warranty .................................................................................. 2 User Notices ............................................................................. 3 Electrical Requirements .............................. ...
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Bunn T3 - page 3
Page 3 #00831.0000 #00656.0000 #03408.0000 #03409.0000 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. 10145 021599 ...
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Bunn T3 - page 4
Page 4 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&q ...
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Bunn T3 - page 5
Page 5 INITIAL SET-UP (FILL & HEAT) CAUTION - The brewer must be disconnected from the power source throughout the Initial Set-Up , except when specified in the instructions. 1. Complete the electrical and plumbing instructions prior to starting this procedure. 2. Remove the top panel and check that the thermostat dial is rotated fully counterc ...
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Bunn T3 - page 6
Page 6 10. Install the ferrule and screen in the funnel. Load the funnel with a BUNN ® paper filter and approximately four ounces of loose tea leaves. Depress the start button to brew tea and observe the funnel drip out and the dilution streams near the end of the cycle. The dilution stream should stop approximately thirty seconds after the drip o ...
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Bunn T3 - page 7
Page 7 B. SELECTOR SWITCH (T6 ONLY) Placing the selector switch in the "ON" (left or right) position allows the start switch to activate a timed brew cycle for three gallons of tea. It also selects into which reservoir dilution water will be introduced. This switch should always be in the "OFF" (center) position after a brew cyc ...
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Bunn T3 - page 8
Page 8 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 ...
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Bunn T3 - page 9
Page 9 TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE REMEDY Brew cycle will not start (cont.) Water is not hot Dilution cycle will not start 5. Start Switch 6. Brew Timer 7. Brew Solenoid Valve 8. Internal Flow control (.195 GPM) 1. Limit Thermostat CAUTION - Do not eliminate or by- pass limit thermostat or thermal cut-off. Use only BOM replacemen ...
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Bunn T3 - page 10
Page 10 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 Valve 1. Internal Flow Control (.195 GPM) 2. Syphon System 3. Lime Build-up CAUTION - Tank and tank compo- nents should be delime ...
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Bunn T3 - page 11
Page 11 TROUBLESHOOTING (cont.) Spitting or excessive steaming Drip-out time too long Dripping from sprayhead Water flows into tank continuously (ON/OFF or Slector Switch "ON") Water flows into tank continuously (ON/OFF or Selector Switch "OFF") 1. Lime Build-up CAUTION - Tank and tank compo- nents should be delimed regularly de ...
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Bunn T3 - page 12
Page 12 TROUBLESHOOTING (cont.) Beverage overflows dispenser Weak beverage 1.Dispenser 2. Brew Timer 3. Brew Solenoid Valve 4. Dilution Timer 5. Dilution Solenoid Valve 1. Filter Type 2. Tea 3. Sprayhead 4. Funnel Loading 5. Water Temperature The dispenser must be completely empty before starting a brew cycle. Refer to Service - Brew Timer for test ...
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Bunn T3 - page 13
Page 13 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. (A) The brewer must be connected to a cold water line. (B) Water pressure to the brewer must no ...
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Bunn T3 - page 14
Page 14 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 pe ...
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Bunn T3 - page 15
Page 15 SERVICE (cont.) BREW SOLENOID VALVE FIG. 2 BREW SOLENOID VALVE P1833.50 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. 2. Disconnect the white/violet and white/green wires from the solenoid valve. With ...
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Bunn T3 - page 16
Page 16 FIG.3 SOLENOID VALVE TERMINALS P1834 SERVICE (cont.) BREW SOLENOID BREW SOLENOID DILUTION SOLENOID RT RESERVOIR DILUTION SOLENOID LT RESERVOIR DILUTION SOLENOID WHI/BLU to Dilution Timer TL4 BRN/BLK to Selector Switch YEL to Selector Switch WHI/GRN to Brew Timer TL4 WHI/VIO to Brew Timer TL1 T6 WHI/BLU to Dilution Timer TL4 WHI/VIO to Brew ...
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Bunn T3 - page 17
Page 17 BREW TIMER FIG. 4 BREW TIMER P1833 Location: The brew timer is located in the hood. It consists of the left dial plate and circuit board. Test Procedure: 1. Disconnect the brewer from the power source. 2. Remove the wires from terminals TL3, TL4, & TL5 of the timer and rotate the dial fully counterclock- wise. 2. With a voltmeter, check ...
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Bunn T3 - page 18
Page 18 Location: The timer is located inside the hood, attached to 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 front access panel. 2. Remove the two #8-32 screws securing ...
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Bunn T3 - page 19
Page 19 TL1 - WHI/VIO to Dilution Timer and WHI/VIO to ON/OFF Switch TL2 - WHI to Power Cord (100V & 120V) or RED to Power Connector (240V) and WHI to Dilution Timer (100V & 120V) or RED to Dilution Timer (240V) TL3 - WHI/ORN to Start Switch TL4 - WHI/GRN to Brew Solenoid TL5 - WHI/YEL to Start Switch J2-2 - PNK to Selector Switch (Half Bat ...
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Bunn T3 - page 20
Page 20 240 volt two wire models when the control ther- mostat is turned fully clockwise. Connect the brewer to the power source. The indication must 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 ...
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Bunn T3 - page 21
Page 21 DILUTION SOLENOID VALVE(S) FIG. 10 DILUTION SOLENOID VALVE(S) P2207.40 Location: Viewing the brewer from the rear the dilution so- lenoid for the T3 is mounted on the center of the sole- noid mounting bracket, the T6 solenoids are mounted in the center and the right side of the mounting bracket. Test Procedure: 1. Disconnect the brewer from ...
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Bunn T3 - page 22
Page 22 If continuity is present as described, reconnect the wires to terminals TL3, TL4, & TL5 of the timer board and proceed to #5. If continuity is not present as described, refer to the Wiring Diagrams and check the wiring harness. 5. With a voltmeter, check the voltage across termi- nals TL1 and TL4 when the ON/OFF or selector switch is in ...
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Bunn T3 - page 23
Page 23 LIMIT THERMOSTAT FIG. 13 LIMIT THERMOSTAT P2207.40 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. With a voltmeter, check the voltage across the black wire removed from the limit thermostat and t ...
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Bunn T3 - page 24
Page 24 6. Check for continuity across the center and end terminals of the top row when the switch is in the “ ON ” (left) position. If continuity is present as described, replace the wires, the switch is operating properly. If continuity is not present as described, replace the switch. T3 Brewers W/Half Batch Option 1. Disconnect the brewer fr ...
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Bunn T3 - page 25
Page 25 SERVICE (cont.) T6 Brewers 1. Disconnect the brewer from the power source. 2. Remove the black wire from the top center switch terminal. 3. With a voltmeter, check the voltage across the black wire removed from the selector switch and the white wire or red wire on the tank heater. 4. Connect the brewer to the power source.The indi- cation m ...
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Bunn T3 - page 26
Page 26 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 into ...
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Bunn T3 - page 27
Page 27 TANK HEATER FIG. 19 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 240 volt models. Connect t ...
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Bunn T3 - page 28
Page 28 10145 072600 ...
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Bunn T3 - page 29
Page 29 10145 072600 ...
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Bunn T3 - page 30
Page 30 10145 072600 ...
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