Bunn G3 Service Manual

BUNN®G1,G2G1,G2& G3& G3OPERATING & SERVICE MANUALBUNN-O-MATIC CORPORATIONPOST OFFICE BOX 3227SPRINGFIELD, ILLINOIS 62708-3227PHONE: (217)

10If voltage is present as described, proceed to#5.If voltage is not present as described, refer tothe Wiring Diagrams and check the grinder wir-ing

1111. Clean all grinding burrs and mounting surfacesbefore reassembly.12. Install the four .250"-20 cage nuts on the newmotor.13. Place the new m

12SERVICE (cont.)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 tr

1317. Install grind selector dial plate (18) with adjust-ing screw w/bearing (19) onto the grind cham-ber and secure with two .250"-20 screws (1)

14SERVICE (cont,)DC MOTOR AND GRIND CHAMBER - G1MD ONLY(cont.)BLU to BLU from RectifierBLU to WHI/BLU fromRelay (3)RED to Rectifier (-)BLK to Rectifie

15SERVICE (cont,)DC MOTOR AND GRIND CHAMBER - G1MD ONLY(cont.)1. Select the desired grind.2. Lift the lid and pour coffee beans into the hopper.3. Sli

16Location:The Off/On/Start switch is located in the up-per front wrapper above and to the right of the grindselector knob (left side when viewed from

17+ACACSERVICE (cont.)Removal and Replacement:1. Disconnect the wires from the rectifier.2. Remove the #10-32 screw securing the rectifierto the motor

18Location:The relay is located on the grinder base insidethe lower housing.Test Procedure:1. Disconnect the grinder from the power sourceand place a

19WHI/BLU fromMotor to RelayK-4WHI/ORN from BagSensor Switch (A)WHI/ORN from BagSensor Switch (A)WHI/BLU fromMotor to RelayK-4WHI/RED fromSwitch to Re

2INTRODUCTIONThis equipment will grind whole bean coffee to a user-selectable setting and dispense it into a bag. Theequipment is only for indoor u

20SW2WHI/VIOWHI/VIOBLUWHI/ORAASCHEMATIC WIRING DIAGRAM G1-MDGRNL1NSW1BLK WHI/REDKB120 VOLTS AC2 WIRESINGLE PHASE 60 HZ 10621.0000C 10/98 © 1992 BUNN-

21WHI/VIOWHI/VIOWHI/BLUWHI/ORAASCHEMATIC WIRING DIAGRAM G1A, G2A & G3AGRN/YELL1L2SW1BLKWHI/REDWHI/REDSW2N.O.N.O.BML1L2RED (230V)RED/BLK (240V)RED

3TURKISHSPECIALREGPERCELECPERCAUTOMATICDRIPFINEESPRESSOUse only on a properly protected circuitcapable of the rated load.Electrically ground the chass

4ELECTRICAL REQUIREMENTSThe 120 volt and 240 volt grinders have an attached cordset and requires 2-wire, grounded service rated 120volts ac and 240 vo

5COFFEE GRINDING1. 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

6A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problemsencountered. If the problem remains after ex

7TROUBLESHOOTING (cont.)PROBLEMGrinder will not start. (cont.)Grinder will not shut off.PROBABLE CAUSE3. Bag Sensor. (cont.)4. Motor overload protecto

8TROUBLESHOOTING (cont.)PROBABLE CAUSE1. Hopper2. Entrance to grind chamber3.Shear PlatePROBLEMGrinder starts, but will not dis-pense.REMEDYCoffee mus

9CONTENTSBag Sensor Switch ............ 9Motor and Grind Chamber (AC) ....... 10Motor and Grind Chambe