Bunn Dual TF Operating & Service Manual

1.75 gallon

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Operating & service manual (46 pages)

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BUNN

OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: (217) 529-6601 FAX: (217) 529-6644

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1.75 GALLON

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Page 1 BUNN OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION PHONE: (217) 529-6601 FAX: (217) 529-6644 27124.0000 6/00 ©1996 Bunn-O-Matic Corporation ® DUAL E FO E OR R ON Y BE S MA D UN R PA E OR e if IN G...
Page 2: Warranty
SPECIFIED HEREIN, TO REPAIR OR, AT BUNN’S SOLE OPTION, REPLACEMENT OR REFUND. In no event shall Bunn be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.
Page 3: User Notices
USER NOTICES The notices on this brewer should be kept in good condition. Replace unreadable or damaged labels. 00658.0000 00656.0000 ELECTRICAL REQUIREMENTS CAUTION - The brewer must be disconnected from the power source until specified in Initial Set-Up. L2 RED L1 BLACK Requires 2-wire, grounded service rated 200 to 240 volts...
Page 4: 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: Operating Controls
COFFEE BREWING 1. Select the desired batch size. ® 2. Insert a BUNN filter into the funnel. 3. Pour the proper amount of fresh ground coffee into the filter and level the bed of grounds by gently shaking. 4. Slide the funnel into the funnel rails.
Page 6: Troubleshooting
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 personnel.
Page 7 TROUBLESHOOTING (cont.) Problem Brew cycle will not start (cont.) Automatic refill will not operate Probable Cause 3. Water strainer/flow control (.750 GPM) 4. ON/OFF switch 5. Start switch 6. Timer 7. Dispense Valve 8. Control Assembly (Electronic) 9. Brew selector switch 10.
Page 8 TROUBLESHOOTING (cont.) Problem Automatic refill will not operate (cont.) Beverage level will not adjust (Se- lector switch in any position) Water flows into tank continuously . Water flows into tank continuously (ON/OFF switch "ON"). Water from tank is not hot Probable Cause 4.
Page 9 TROUBLESHOOTING (cont.) Problem Water from tank is not hot (cont.). Spitting or unusual steaming from sprayhead or airvents. Inconsistent beverage level in server. Probable Cause (B) Control assembly (Electronic) 3. Contactor (Brewers with Recov- ery booster) 4. Tank heaters 5. Triac assembly (Electronic) 6.
Page 10 Refer to Initial Set -Up on page 5 step #7. For test procedures see page 13. Refer to Initial Set-Up on Page 5 step #7. BUNN ® paper filters should be used for proper extraction. Check sprayhead The brew cycle should be started only with an empty server under the funnel.
Page 11 B.O.M. sprayhead #01082.0002 should be used to properly wet the bed of ground coffee in the funnel. The BUNN ® paper filter should be centered in the funnel and the bed of ground coffee leveled by gentle shak- ing.
Page 12: Table Of Contents
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 13: Bypass Valve
SERVICE (cont.) BYPASS VALVE A TI A TI 1⁄2 1. 5 1. 5 1 ga 1⁄2 .5 .5 A TI A TI 6- 00 6- 00 P /N P /N 1. 5 1. 5 C TO .5 .5 6- 00 6- 00 R EA P /N...
Page 14: Cr Tc Y
SERVICE (cont.) BREW SELECTOR SWITCH E FO R ON E OR Y BE D UN R PA E OR br ew r si s to S er re fu C he re w w er B re al d' re : ra tu M cD m pe...
Page 15 SERVICE (cont.) BREW SELECTOR SWITCH (cont.) 6. Install the new switch. The positioning tab must be in the hole in the hood for proper switch and knob alignment. 7. Install the knob so that the arrow points to the 1- 3/4 gallon position when the switch is turned to the full right position.
Page 16: Contactor Assembly
SERVICE (cont.) CONTACTOR ASSEMBLY A TI A TI 1. 5 1. 5 1⁄2 1 ga 1⁄2 .5 .5 6- 00 6- 00 P /N P /N M ER A TI A TI C TO 1. 5 1. 5 R EA .5 .5 6- 00 6- 00...
Page 17 SERVICE (cont.) CONTACTOR ASSEMBLY (cont.) Test Procedures : Electronic Control (Brewers w/Recovery Booster) 1. Disconnect the brewer from the power source. 2. Disconnect the gray wire from the black wire on the contactor coil and white /brown wire from the remaining black wire on the contactor coil.
Page 18: Control Thermostat
SERVICE (cont.) CONTROL THERMOSTAT A TI A TI 1. 5 1. 5 1⁄2 1 ga 1⁄2 .5 .5 6- 00 6- 00 P /N P /N A TI A TI C TO 1. 5 1. 5 .5 .5 R EA 6- 00 6- 00 P /N...
Page 19: Dispense Valve
SERVICE (cont.) CONTROL THERMOSTAT (cont.) BLU to Left & Right Ready Lights BLU to RED Lead From Liquid Level Switch BLK to BLK Lead of Contactor Coil BLK toLeft & Right Ready Lights DISPENSE VALVE A TI A TI 1. 5 1.
Page 20 SERVICE (cont.) DISPENSE VALVE (cont.) Removal and Replacement: 1. Drain enough water from the tank so the dispense valves are above the water line. 2. Disconnect wires and water tubes from dispense valve. 3. Remove dispense valve from the sprayhead panel. 4.
Page 21 SERVICE (cont.) ELECTRONIC CONTROL ASSEMBLY (cont.) BREW START- LOCK The water must be heated to the preset tempera- ture indicated by the glowing ready light before a brew cycle can be initiated. If the ready light goes out during a brew cycle, the cycle will continue until it is completed.
Page 22 SERVICE (cont.) ELECTRONIC CONTROL ASSEMBLY (cont.) 3. Disconnect brewer from the power source. If voltage was present as described, proceed to #4. If voltage was not present as described, refer to the wiring diagrams and check the brewer wiring harness. 4.
Page 23 Disconnect the brewer from the power source. If voltage was present as described, the temperature control of the system is operating properly. If voltage was not present as described, contact Bunn- O-Matic to order an electronic control assembly (1), P811 temperature sensor (8), and triac assembly (17) for revaluation and proceed to #9.
Page 24 If voltage was present as described, the temperature control of the system is operating properly. Return the new electronic control assembly (1) and temperature sensor (8) to Bunn-O-Matic for credit. Electronic Controls Removal and Replacement NOTE - each electronic control assembly is calibrated to a temperature sensor.
Page 25: C A D
SERVICE (cont.) ELECTRONIC CONTROL ASSEMBLY (cont.) 10. Remove triac/heat sink from right tank mounting bracket and discard. 11. Install new triac/heat sink assembly on right tank mounting bracket. 12. Route the wires up around the rear of the brewer. 13. Reinstall the bottom cover, four feet, tank mount- ing brackets and triac/heat sink to the bottom of the tank using four #10-32 keps nuts.
Page 26: Level Control Board And Level Probe
SERVICE (cont.) LEVEL CONTROL BOARD AND LEVEL PROBE (Electro/mechanical only) A TI A TI 1. 5 1. 5 1⁄2 1 ga 1⁄2 .5 .5 6- 00 6- 00 P /N P /N M ER A TI A TI C TO 1.
Page 27: Limit Thermostat
SERVICE (cont.) LEVEL CONTROL BOARD AND LEVEL PROBE (Electro/mechanical only) (cont.) els and three wire 120/240 volt models. b.) 200 to 240 volts ac for two wire 200 or 240 volt models. 17. Disconnect the brewer from the power source. If voltage is present as described, reinstall the probe, the level control board and level probe are operating properly.
Page 28: On/Off Switch
SERVICE (cont.) ON/OFF SWITCH D BY ILLI F THE Y BE D UND S MA si ze br ew rv er s to re fu C he s Br al d' re : M cD ra tu m pe 8- 96 (3 -1 IF : .
Page 29: Server Sensor
SERVICE (cont.) SERVER SENSOR A TI A TI 1. 5 1. 5 1⁄2 1 ga 1⁄2 .5 .5 A TI A TI 6- 00 6- 00 M ER P /N P /N 1. 5 1. 5 C TO .5 .5 6- 00 6- 00 R EA...
Page 30: Overflow Protection Switch
SERVICE (cont.) SERVER SENSOR (cont.) 3. Turn the server platform over and remove the two #8-32 Keps nuts securing the server sensor to the weld stud on the server platform. 4. Remove the server sensor leaving the two spacers in place. 5.
Page 31: Relay
SERVICE (cont.) RELAY (Brewers W/Recovery Booster) NOTE -Electro/ mechanically controlled brewers have two relays and the electronic controlled have one relay. A TI A TI 1. 5 1. 5 1⁄2 1 ga 1⁄2 .5 .5 6- 00 6- 00 A TI A TI P /N P /N...
Page 32 SERVICE (cont.) Relay (Brewers W/Recovery Booster) (cont.) 1. Disconnect brewer from the power source and place both selector switches in the 1/2 gallon position. 2. Locate the gray wire on terminal 7 and the white/ green wire on terminal B of the relay. 3.
Page 33: Solenoid
SERVICE (cont.) SOLENOID VALVE (Inlet) A TI A TI 1. 5 1. 5 1⁄2 1 ga 1⁄2 .5 .5 6- 00 6- 00 A TI A TI P /N P /N M ER 1. 5 1. 5 C TO .5 .5 6- 00 6- 00 R EA...
Page 34: Start Switch (Brew)
SERVICE (cont.) SOLENOID VALVE (Inlet) (cont.) solenoid valve. 10. Refer to the illustration below when reconnecting the wires. WHI to Level Control Board T3 (120/208V or 120/240V Electro/mechanical) WHI to Terminal Block (120/208V or 120/240V Electronic) Red to Level Control Board T3 (200 or 240V Electro/mechanical or Control Assy T4 Electronic) VIO to Level Control Board T1 (Electro/mechanical) WHI/BLU to Control Assy #1 (Electronic)
Page 35: Tank Heaters
SERVICE (cont.) TANK HEATERS A TI A TI 1. 5 1. 5 1⁄2 1 ga 1⁄2 .5 .5 6- 00 6- 00 P /N P /N M ER A TI A TI C TO 1. 5 1. 5 .5 .5 R EA 6- 00 6- 00...
Page 36: Timers
SERVICE (cont.) TIMERS (Early Models) A TI A TI 1. 5 1. 5 1⁄2 1 ga 1⁄2 .5 .5 6- 00 6- 00 A TI A TI P /N P /N M ER 1. 5 1. 5 C TO .5 .5 6- 00 6- 00 R EA...
Page 37 SERVICE (cont.) Timers (Early Models)(cont.) 1 .5 6 - 0 P / N WHI/RED TL1 to Left ON/OFF Switch WHI/RED TL1 to Left Start Switch WHI TL2 To Terminal Block and Left Soft Heat Relay "B" (White Insert on120/208V and 120/240V Three Pole Terminal Blocks) RED TL2 to Terminal Block (Red Insert on 200V or 240V Two Pole Terminal Blocks.
Page 38 SERVICE (cont.) TIMERS (Late Models) Location: The timers are located inside the left front of the brewer on the upper part of the component bracket. Test Procedures: NOTE: Do not remove or install wires while timer board is installed. Pressure applied to one side may cause damage to the board.
Page 39 SERVICE (cont.) TIMERS (Late Models)(cont.) Timer Setting: NOTE: Check that the brewer is connected to water supply, the tank is properly filled, and a funnel and server are in place, prior to setting or modifying volumes. NOTE: All volume settings must be done with the sprayhead installed.
Page 40 1/2 BATCH (CONNECT 2/3 BATCH AS REQUIRED) FULL BATCH (NO CONNECTION) 3/4 BATCH BATCH COMMON WHI/VIO WHI/RED WHI/ORA 27201.0001B 5/96 © 1996 BUNN-O-MATIC CORPORATION RED-12 TANK HEATERS (TWO) RED-12 READY INDICATORS SW. & THERMOSTAT OPTIONAL RECOVERY BOOSTER LIQUID LEVEL K2 N.O.
Page 41 1/2 BATCH (CONNECT 2/3 BATCH AS REQUIRED) FULL BATCH (NO CONNECTION) 3/4 BATCH BATCH COMMON WHI/VIO WHI/RED WHI/ORA 27201.0002B 5/96 © 1996 BUNN-O-MATIC CORPORATION RED-12 TANK HEATERS (TWO) RED-12 READY INDICATORS SW. & THERMOSTAT OPTIONAL RECOVERY BOOSTER LIQUID LEVEL K2 N.O.
Page 42 1/2 BATCH (CONNECT 2/3 BATCH AS REQUIRED) FULL BATCH (NO CONNECTION) 3/4 BATCH BATCH COMMON WHI/VIO WHI/RED WHI/ORA 27201.0003B 5/96 © 1996 BUNN-O-MATIC CORPORATION OPTIONAL RECOVERY BOOSTER BLU-12 K1 N.O. BLU-12 BLU-12 BLU-12 WHI/BRN TANK HEATER PIN 20 (PROBE) BRN/BLK...
Page 43 FRACTIONAL BATCHES 1/2 BATCH (CONNECT 2/3 BATCH AS REQUIRED) FULL BATCH (NO CONNECTION) 3/4 BATCH BATCH COMMON WHI/VIO WHI/RED WHI/ORA 27201.0004B 5/96 © 1996 BUNN-O-MATIC CORPORATION GRN/YEL OPTIONAL RECOVERY BOOSTER BLU-12 BLU-12 BLU-12 BLU-12 WHI/BRN TANK HEATER PIN 20 (PROBE) BRN/BLK...
Page 44 1/2 BATCH (CONNECT 2/3 BATCH AS REQUIRED) FULL BATCH (NO CONNECTION) 3/4 BATCH BATCH COMMON WHI/VIO WHI/RED WHI/ORA 27201.0005B 5/96 © 1996 BUNN-O-MATIC CORPORATION RED-12 TANK HEATERS (TWO) RED-12 READY INDICATORS SW. & THERMOSTAT OPTIONAL RECOVERY BOOSTER LIQUID LEVEL K2 N.O.
Page 45 FRACTIONAL BATCHES 1/2 BATCH (CONNECT 2/3 BATCH AS REQUIRED) FULL BATCH (NO CONNECTION) 3/4 BATCH BATCH COMMON WHI/VIO WHI/RED WHI/ORA 27201.0006B 5/96 © 1996 BUNN-O-MATIC CORPORATION OPTIONAL RECOVERY BOOSTER BLU-12 BLU-12 BLU-12 BLU-12 WHI/BRN TANK HEATER PIN 20 (PROBE) BRN/BLK ELECTRONIC...
Page 46 1/2 BATCH (CONNECT 2/3 BATCH AS REQUIRED) FULL BATCH (NO CONNECTION) 3/4 BATCH BATCH COMMON WHI/VIO WHI/RED WHI/ORA 27201.0007B 5/96 © 1996 BUNN-O-MATIC CORPORATION RED-12 TANK HEATERS (TWO) RED-12 READY INDICATORS SW. & THERMOSTAT OPTIONAL RECOVERY BOOSTER LIQUID LEVEL K2 N.O.
Page 47: Wiring Diagrams
FRACTIONAL BATCHES 1/2 BATCH (CONNECT 2/3 BATCH AS REQUIRED) FULL BATCH (NO CONNECTION) 3/4 BATCH BATCH COMMON WHI/VIO WHI/RED WHI/ORA 27201.0008B 5/96 © 1996 BUNN-O-MATIC CORPORATION GRN/YEL OPTIONAL RECOVERY BOOSTER BLU-12 BLU-12 BLU-12 BLU-12 WHI/BRN TANK HEATER PIN 20 (PROBE) BRN/BLK...

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