G9 hd g9t hd per son al inj ury haz ard . Kee p f ing ers an d for eig n o bje cts ou t o f h opp er or ch ute op eni ng . Cau tion per son al inj ury haz ard . Kee p f ing ers an d for eig n o bje cts ou t o f h opp er or ch ute op enin g. Cau tion operating & service manual bunn-o-matic corporatio...
Page 2 contents introduction ---------------------------------------------------- 2 warranty ------------------------------------------------------- 2 user notices --------------------------------------------------- 3 electrical requirements -------------------------------------- 3 initial set up --...
Page 3 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. Keep fingers and foreign objects out of hopper or chute opening. ...
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.) 7. Make a mark with a pen on the decal to note the position of the arrow on the grind adjustment screw. 8. The following settings approximately correspond to the cbc recognized grinds. All are referenced from the arrow position noted in step 7. Fine...
Page 6 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 ...
Page 7 troubleshooting (cont.) problem grinder will not start. (cont.) grinder will not shut off. Grinder starts, but will not dis- pense. Incorrect amount of coffee. Incorrect coffee grind dispensed. Probable cause 4. Timer 5. Relay 6. Motor 1. Off/on/start switch 2. Timer 3. Relay 1. Hopper 2. Bot...
Page 8 service this section provides procedures for testing and replacing various major components used in this grinder should service become necessary. Refer to troubleshooting for assistance in determining the cause of any problem. Warning - inspection, testing, and repair of electri- cal equipmen...
Page 9 motor of the grinder housing through the hole in the motor mounting plate. 3. Remove both 6-32 screws beneath the upper front inspection panel. 4. Remove the six 10-32, hex head screws on top of the motor mounting plate. 5. Slowly slide the assembly out the rear of the grinder housing. The mo...
Page 10 service (cont.) motor (cont.) 1. Adjusting screw locknut 2. Adjusting screw 3. Burr housing cap 4. Rotor cup 5. Shear plate 9 8 7 6 5 4 3 2 1 6. Rotor 7. Spring 8. Burr (rotating) 9. Burr (stationary) p1311 10171 041597 removal and replacement - grind chamber 1. Refer to the illustration abo...
Page 11 service (cont.) off/on/start switch location: the off/on/start switch is centered in the housing above the upper front inspection panel. Test procedure: 1. Disconnect the grinder from the power supply. 2. Remove the black wire from the switch. 3. Check for continuity across the black wire fr...
Page 12 relay location: the relay is located on the timer bracket in the grinder base. The bracket can be removed by loosen- ing the two 8-32 screws beneath the timer dial. Test procedure: 1. Disconnect the grinder from the power supply. 2. Check the voltage across the white/red and white/ green wir...
Page 13 service (cont.) timer location: the timer is located on the timer bracket in the grinder base. The bracket can be removed by loosen- ing the two 8-32 screws beneath the timer dial(s). Test procedure: 1. Disconnect the grinder from the power supply. 2. Check the voltage across terminals tl1 &...
Page 14 10173-0000f 4/91 © 1987 bunn-o-matic corporation whi/grn blk k1 whi/blu m l2 l1 120 volts ac 2 wire single phase 60 hz l1 n green k1 n.O. Schematic wiring diagram g9 timer whi/red whi/yel whi/ora whi whi whi/red whi/red optional key sw 5 4 3 2 1 w h i / o r a ora urn carafe whi/grn 1 blk k1 ...
Page 15 10187-0000b 11/97 © 1987 bunn-o-matic corporation whi/grn blk k1 whi/blu m l2 l1 200 volts ac 2 wire single phase 50 hz l1 l2 green k1 n.O. Schematic wiring diagram g9a hd timer whi/red whi/yel whi/ora red/blk red/blk whi/red whi/red 5 4 3 2 1 10187.0001b 11/97 © 1997 bunn-o-matic corporatio...
Page 16 wiring diagram 4 3 whi/grn 1 blk whi/blu l2 l1 120 volts ac 2 wire single phase 60 hz 10388-0000b 12/88 © 1988 bunn-o-matic corporation l1 n green k1 n.O. Schematic wiring diagram g9 timer 3 2 4 5 whi/red whi/yel whi/ora whi whi whi/red whi/red gry 1 2 optional multi-set sw optional brewer i...
