Bunn G9 HD Operating & Service Manual
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Bunn G9 HD Operating & Service Manual

Coffee brewer
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BUNN
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
10171.0000
5/00 © 1986 Bunn-O-Matic Corporation
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POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
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G9 HD
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  • Page 1 G9 HD G9T HD B JE F IN N IN B JE F IN N IN OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 10171.0000 5/00 © 1986 Bunn-O-Matic Corporation...

  • Page 2: Table Of Contents

    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 Carefully read and follow all notices on the grinder and in this manual. They were written for your protection. All notices on the grinder are to be kept in good condition. Replace any unreadable or damaged labels. #05876.0000 #20545.0000 ELECTRICAL REQUIREMENTS This grinder has an attached cordset and requires 2-wire, grounded service rated 120 volts ac, 15 amp,...

  • Page 4: Cleaning

    The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment. Care should be taken not to scratch the windows with any abrasive mate- rial. Regular cleaning will keep your grinder looking new for years.
  • Page 5 ADJUSTMENTS (cont.) Burr Adjustment (cont.) The following settings approximately correspond to the CBC recognized grinds. All are referenced from the arrow position noted in step 7. FINE GRIND: Rotate the adjusting screw 7 hash marks in a counterclockwise direction. DRIP GRIND: Rotate the adjusting screw 8 hash marks in a counterclockwise direction. REGULAR (COARSE) GRIND: Rotate the adjusting screw 12 hash marks in a counterclockwise direction.

  • 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 Tech- nical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only by qualified service per- sonnel.
  • Page 7 TROUBLESHOOTING (cont.) Problem Probable Cause Remedy Grinder will not start. (cont.) 4. Timer Refer to Service - Timer for testing procedures. See page 13. 5. Relay Refer to Service - Relay for testing procedures. See page 12. 6. Motor Refer to Service - Motor for testing procedures.

  • Page 8: Service

    DAMAGE, FIRE, OR SHOCK HAZARD READ THE ENTIRE OPERATING MANUAL INCLUDING THE LIMIT OF WARRANTY AND LIABILITY BEFORE BUYING OR USING THIS PRODUCT 20545-0000 7/90 © 1990 Bunn-O-Matic Corporation NOTICE For connection to Bunn-Omatic Coffee Brewer Models: Dual, OT, Single, & System III only.

  • Page 9: Motor

    SERVICE (cont.) If voltage is present as described and the grinder remains unable to start, replace the motor. Motor If voltage is not present as described, refer to the Wiring Diagrams, and check the grinder wiring har- ness. Removal and Replacement - MOTOR Remove all wires from the Off/On/Start switch, motor, and motor mounting plate.
  • Page 10 SERVICE (cont.) Motor (cont.) 11191.0001 F I N F I N P1311 6. Rotor 1. Adjusting Screw Locknut 7. Spring 2. Adjusting Screw 8. Burr (Rotating) 3. Burr Housing Cap 9. Burr (Stationary) 4. Rotor Cup 5. Shear Plate Removal and Replacement - GRIND CHAMBER Refer to the illustration above and remove the Inspect the grind chamber and remove any for- two 1/4"-20, hex head screws holding the burr...

  • Page 11: Off/On/Start Switch

    If continuity is present as described, the Off/On/ SERVICE (cont.) Start switch is operating properly. If continuity is not present as described, replace Off/On/Start Switch the switch. Removal and Replacement: Remove all wires from the switch terminals. Compress the clips inside the front wrapper and gently push the switch through the opening.

  • Page 12: Relay

    green wires of the relay coil with a voltmeter when SERVICE (cont.) the Off/On/Start switch is placed in the “START” If continuity is not present as described, replace (right) position and released. Connect grinder the switch. to the power supply. The indication must be: (a) 120 volts ac for two wire 120 volt models Removal and Replacement: (b) 240 volts ac for two wire 240 volt models...

  • Page 13: Timer

    SERVICE (cont.) Check the voltage across terminals TL1 and TL4 with a voltmeter when the Off/On/Start switch Timer is placed in the “START” (right) position and re- leased. Connect grinder to the power supply. The indication must be: (a) 120 volts ac for two wire 120 volt models. (b) 240 volts ac for two wire 240 volt models.

  • Page 14: Wiring Diagram

    WHI/RED WHI/BLU WHI/YEL WHI/GRN K1 N.O. WHI/ORA TIMER OPTIONAL KEY SW 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ 10173-0000F 4/91 © 1987 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM G9-URN/CARAFE GREEN WHI/RED WHI/RED WHI/RED WHI/BLU WHI/YEL WHI/ORA WHI/GRN K1 N.O.
  • Page 15 WHI/RED WHI/BLU RED/BLK WHI/YEL WHI/ORA WHI/GRN K1 N.O. 200 VOLTS AC TIMER 2 WIRE SINGLE PHASE 50 HZ 10187-0000B 11/97 © 1987 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM G9A HD POWER INDICATOR LIGHT RED/BLK WHI/RED GREEN WHI/RED RED/BLK WHI/RED WHI/RED WHI/BLU...
  • Page 16 K1 N.O. WHI/ORA OPTIONAL KEY SW TIMER 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ OPTIONAL OPTIONAL BREWER 10388-0000B 12/88 © 1988 BUNN-O-MATIC CORPORATION MULTI-SET SW INTERFACE CONNECTOR SCHEMATIC WIRING DIAGRAM G9 GREEN WHI/RED WHI/RED WHI/RED WHI/BLU WHI/YEL WHI/ORA WHI/GRN K1 N.O.

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