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BUNN
G1,G2
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OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
10191.0000Q 1/00 ©1995 Bunn-O-Matic Corporation
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1. Select the desired grind.
2. Lift the lid and pour coffee beans into the hopper.
3. Slip bag under the chute. Rest the bag on the tray.
4. Press the start switch.
STOP
5. Flip t
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INTRODUCTION This equipment will grind whole bean coffee to a user-selectable setting and dispense it into a bag. The equipment is only for indoor use on a sturdy counter or shelf. Adequate space must be available above the grinder to raise the lid when adding beans. BUNN-O-MATIC COMMERCIAL GRINDER WARRANTY Bunn-O-Matic Corp. (“Bunn”) warrants the equipment manufactured by it to be commercially free from defects in material and workmanship existing at the time of manufacture and appearing wi
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O S S E R P S E E N I F P I R D S C P I E T 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. 11075.0004 (SPECIAL) 11075.0000 WARNING Use only on a properly protected circuit capable of the rated load. Electrically ground the chassis. Follow national/local electrical codes. PLEASE CLOSE LID Do not use near combustibles.
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ELECTRICAL REQUIREMENTS The 120 volt and 240 volt grinders have an attached cordset and requires 2-wire, grounded service rated 120 volts ac and 240 volts ac, 15 amp, single phase, 60 Hz. The 230 volt grinders have a power connector and requires 2-wire, grounded service rated 230 volts ac, 15 amp, single phase, 50 Hz. INITIAL SET-UP CAUTION - Unplug the grinder throughout the initial set-up. 1. Open the top lid. Clear all foreign objects and shipping materials from the hopper compartment and the
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COFFEE GRINDING 1. Turn the selector knob to align the red arrow with the desired grind. 2. Raise the top lid and add the whole bean coffee. Close the top lid. 3. Locate the back of a bag behind the dispense chute. (The grinder will not operate unless the bag is behind the chute.) 4. Allow the bag to rest on the screen beneath the chute. 5. Press the start switch. 6. Flip the cleaning lever a few times as dispensing slows. 7. Remove the bag when ground coffee is no longer dispensed from the chut
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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. WARNING – • Exercise extreme caution when servicing electrical equipment. • Disconnect the grinder from the power source when
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TROUBLESHOOTING (cont.) PROBABLE CAUSE PROBLEM REMEDY 3. Bag Sensor. (cont.) Grinder will not start. (cont.) (B) Refer to Service - Bag Sensor Switch for testing and adjustment procedures. See page 9. 4. Motor overload protector. Remove the plug located on the right side of the housing. Press the red “Reset” button visible through the opening. Listen carefully for a “click”. This resets the motor pro- tection circuit and may indicate that an overload has been encoun- tered by the motor. (An over
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TROUBLESHOOTING (cont.) PROBLEM REMEDY PROBABLE CAUSE Grinder starts, but will not dis- Coffee must be poured into hopper 1. Hopper pense. before grinding. Foreign materials must not block the 2. Entrance to grind chamber opening at the bottom of the hop- per. Remove both black fillister head 3.Shear Plate screws holding the grinder selector dial plate to the grinder. Carefully remove the dial plate and rotor cup. Inspect the shear plate for wear. Replace if excessively worn or dam- aged. 8
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O S S E R P S E E N I F AC MOTOR AND GRIND CHAMBER SERVICE (cont,) BAG SENSOR SWITCH (cont.) If voltage is present as described, proceed to #5. If voltage is not present as described, refer to the Wiring Diagrams and check the grinder wir- ing harness. 5. Check for continuity across the terminals on the bag sensor switch. 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 Replac
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11. Clean all grinding burrs and mounting surfaces SERVICE (cont,) before reassembly. AC MOTOR AND GRIND CHAMBER (cont.) 12. Install the four .250"-20 cage nuts on the new black and white/blue wires on terminals L1 & motor. L2 with a voltmeter. Connect the grinder to the 13. Place the new motor with hopper collar and power source. When the Off/On/Start switch is bushing into position on the bushings on the momentarily placed in the “START” (lower) po- motor mounting bracket. sition and then lef
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SERVICE (cont,) BLU to BLU from Rectifier DC MOTOR AND GRIND CHAMBER - G1MD ONLY BLU to WHI/BLU from (cont.) Relay (3) RED to Rectifier (-) 10. Remove motor and bracket out the rear of the BLK to Rectifier (+) grinder housing. 11. Remove the two .250"-20 screws securing the motor to the front of the mounting bracket. 12. Remove the two #10-32 screws securing the motor to rear of the mounting bracket. P1710 13 Remove motor from bracket. FIG. 8 DC MOTOR TERMINALS 14. Clean all grinding burrs and
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O S S E R P S E E N I F If continuity is present as described, proceed to #6. SERVICE (cont,) If continuity is not present as described, replace the OFF/ON/ START SWITCH switch. 6. Check for continuity across the two 3/16" termi- nals when the switch is held in the “START” (lower) position. Continuity must not be present across these terminals in the “OFF” (upper) or “ON” (center) positions. If continuity is present as described, the Off/On/Start switch is operating properly, reconnect the four
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SERVICE (cont,) WHI to Main WHI/VIO from Harness 120V (B) RELAY (cont.) Switch to Relay RED/BLK to Main K-6 Removal and Replacement (120 Volt and 240V 60 Hz Harness 240V (B) Models): 1. Remove the wires from the relay terminals. WHI/BLU from 2. Remove the two #6-32 screws securing the re- Motor to Relay lay bracket w/relay to the grinder base and re- K-4 move bracket and relay as an assembly. WHI/RED from 4. Remove the #6-32 screw securing the relay to WHI/ORN from Bag Switch to Relay the bracke
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SCHEMATIC WIRING DIAGRAM G1, G2 & G3 L1 N GRN SW1 K-7 BLK WHI/RED WHI/BLU WHI M K-4 L1 L2 K-6 120 VOLT AC WHI/VIO K-9 2 WIRE SW2 SINGLE PHASE 60 HZ WHI/ORA WHI/VIO WHI K A B 10190.0000F 9/91 © 1985 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM G1-MD L1 N GRN BLK BLK SW1 BLU BLU BLK WHI/RED K-7 BLU BLU M K-4 RED RED - + RECT WHI/VIO K-6 K-9 WHI SW2 WHI/VIO WHI/ORA WHI K A B 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ 10621.0000C 10/98 © 1992 BUNN-O-MATIC CORPORATION 20
