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Bunn LPG manual

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Table of contents for the manual

  • Page 1

    B UNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 FAX: (217) 529-6644 www .bunnomatic.com OPERA TING & SER VICE MANU AL[...]

  • Page 2

    2 CONTENTS User Notices ............................................................. 3 Electrical Requirements ............................................ 3 Operating Controls .................................................... 3 Cleaning .................................................................... 4 Coffee Grinding .....................[...]

  • Page 3

    3[...]

  • Page 4

    4 CLEANING EXTERIOR SURFACES The use of a damp cloth rinsed in any mild, nonabrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment. Care should be taken not to scratch the hopper or windows with any abrasive material. Regular cleaning will keep your grinder looking new for years. GRIND CHAMBER 1. WARNING - Unp[...]

  • Page 5

    5 C O A R S E - F I N E B U N N INITIAL SET-UP/ADJUSTMENTS The grind can be set from fine to very coarse. The grind may be adjusted for use in most commercial coffee brewers. The following procedures should be used to make adjustments. NOTE - A change in the burr adjustment will also change the amount dispensed. Any adjustment to the burrs should b[...]

  • Page 6

    6 Problem Grinder will not start. Remedy (A) Plug-in the grinder . (B) Check the voltage at the wall outlet with a voltmeter . It must be 120 volts ac for 120 volt models, 100 volts for 100 volt models, and 230 volts for 230 volt models. (A) Momentarily press the Off/On/ Start switch to the “ST ART”(lower) position. (B) Refer to Ser vice - Off/[...]

  • Page 7

    7 TROUBLESHOOTING (cont.)[...]

  • Page 8

    8 Use only on a properly protected circuit capable of the rated load. Electrically ground the chassis. Follow national/local electrical codes. Do not use near combustibles. An extension cord, when used, must be shorter than 20 feet if 16-gage 3-conductor wire, or shorter than 10 feet if 18-gage 3-conductor wire. FAILURE TO COMPLY RISKS EQUIPMENT DA[...]

  • Page 9

    9 SERVICE (cont.) Capacitor (Model LPG)(cont.) Location: The capacitor is located inside the front panel of the hopper housing next to the Off/On/Start switch. Test Procedure: 1. Disconnect grinder from the power source. 2. Visually inspect the capacitor for leakage. If leak- age is visible, replace the capacitor. 3. Connect the grinder to the powe[...]

  • Page 10

    10 P1038 Hopper Selector Switch (Model LPG-2E) P1029 Location: The Hopper Selector Switch is located in the lower left front of the hopper housing. T est Procedure: 1. Disconnect grinder from the power supply. 2. Remove all wires from the switch terminals. 3. Check that the switch is installed properly, FIG. 10. 4. Place the selector switch in the [...]

  • Page 11

    11 P1022 Location: The motor is located inside the hopper assembly. Test Procedures: 1. Disconnect grinder from the power supply. 2. On Model LPG-2E, disconnect the black wire and the white wire to the motor from the main wiring harness, the red wire to the circuit breaker and the red wire to the Off/On/Start switch. On Model LPG disconnect the mot[...]

  • Page 12

    12 1. Retaining Ring W/Hopper Gasket 2. Filler Plate 3. Slide Plate, Solenoid Plunger and Spring 4. Spacer Plate 5. Setscrew, #10 -32 6 Mounting Ring, Solenoid and Solenoid Mounting Plate 7. Setscrew, #8-32 8. Burr Housing Divider 9. Motor and Burr Housing P1050 1 3 4 6 5 7 8 2 3 9 FIG. 13 SOLENOID AND GA TES SERVICE (cont.) Motor (cont.) 9. Slide [...]

  • Page 13

    13 22. Remove the two #8-32 flat head screws securing the motor cover (18) to the motor and housing assembly (17) and remove the cover. Set aside for reassembly. 23. Discard old motor and housing assembly. 24. Place new motor on it’s side and install motor cover (18) using two #8-32 flat head screws. 25. Install upper burr (16) to the new motor a[...]

  • Page 14

    14 SERVICE (cont.) OFF/ON/START Switch Location: The Off/On/Start switch is located on the right front side of the hopper housing. Test Procedure: 1. Disconnect grinder from the power source. 2. Remove all wires from the switch terminals. 3. Check for continuity across the .187" terminals of the switch when it is held in the lower “START” [...]

  • Page 15

    15 solenoid with a voltmeter. Connect the grinder to the power source and place the Off/On/Start switch in the “ON” center position. The indication must be 120 volts AC. 4. Disconnect the grinder from the power source. If voltage is present as described, proceed to #5. If voltage is not present as described, refer to the wiring diagram and chec[...]

  • Page 16

    16 SERVICE (cont.) Timer (Model LPG-2E) P1061 Location: The timer is located inside the hopper housing just behind the left solenoid. Test Procedure: 1. Disconnect grinder from the power sour ce. 2. Insert the leads of a voltmeter set to read at least 120 volts AC, along side the red wire (terminal 8) and the white wire (terminal 2) of the harness [...]

  • Page 17

    17 8. Slip timer and timer mounting bracket under the two screws on the motor support plate and tighten screws. 9. Locate the left and right timer dials in their proper place on the rear panel and secure with nuts and internal tooth lockwashers. 10. Place timer knobs on timers. 11. Reconnect harness plug to the terminal block on the timer board. SE[...]

  • Page 18

    18 WIRING SCHEMA TICS 27103.0000C 11/98 © 1996 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM LPG2E N L1 BLK RED WHI 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ GRN 3 AMP 2 3 4 5 6 1 7 8 9 10 TIMER ASSY. (Hopper Slide Gate Timer Dial Wiring) Right - Brown Left - Orange YEL WHI BLU YEL WHI/BLK BLK RED VIO ORA OFF/ON/START SWITCH RED RED RED GRN SELEC[...]

  • Page 19

    19 BLK WHI RED RED 10529.0000C 3/92 © 1990 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM LPG & LPG2 N L1 B L K P1 2 3 4 5 6 1 RED WHI/BLK BLK WHI/BLU WHI/BRN WHI GRN RED WHI/BLK BLK WHI/BLU WHI/BRN WHI BLK RED WHI/BRN WHI/BLU 1 2 3 4 5 P2 BLK RED WHI/BRN WHI/BLU DC MOTOR BLK WHI RED RED 4 1 2 3 P3 GREEN 3 AMP TIMER BLK W H I 120 VOLTS AC 2[...]

  • Page 20

    20 BLK WHI RED RED 10529.0002E 8/01 © 1990 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM LPG-A L2 L1 B L K P1 2 3 4 5 6 1 RED WHI/BLK BLK WHI/BLU WHI/BRN WHI GRN RED WHI/BLK BLK WHI/BLU WHI/BRN WHI BLK RED WHI/BRN WHI/BLU 1 2 3 4 5 P2 BLK RED WHI/BRN WHI/BLU DC MOTOR BLK WHI RED RED 4 1 2 3 P3 GRN/YEL 3 AMP TIMER BLK R E D 230 VOLTS AC 2 WIRE [...]

  • Page 21

    21 BLK WHI RED RED 10529.0003E 10/98 © 1998 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM LPG W/Capacitor L1 P1 2 3 4 5 6 1 1 2 RED WHI/BLK BLK WHI/BLU WHI/BRN WHI GRN RED WHI/BLK BLK BLK WHI/BLU WHI/BRN WHI BLK BLK BLK RED WHI/BRN WHI/BRN WHI/BRN WHI/BLU 1 2 3 4 5 P2 BLK RED WHI/BRN WHI/BLU DC MOTOR BLK WHI RED RED 4 1 2 3 P3 GREEN TIMER BLK [...]

  • Page 22

    22 WIRING SCHEMA TICS BLK WHI RED RED 10529.0001D 10/98 © 1990 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM LPG-B N L1 B L K P1 2 3 4 5 6 1 RED WHI/BLK BLK WHI/BLU WHI/BRN WHI GRN RED WHI/BLK BLK WHI/BLU WHI/BRN WHI BLK RED WHI/BRN WHI/BLU 1 2 3 4 5 P2 BLK RED WHI/BRN WHI/BLU DC MOTOR BLK WHI RED RED 4 1 2 3 P3 GREEN 3 AMP TIMER BLK W H I 100[...]