FPG
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
36783.0000A
05/04 ©2004 Bunn-O-Matic Corporation
www.bunnomatic.com
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
The grinder has an attached cordset and requires 2-wire, grounded service rated 120 volts ac, 15 amp, single
phase, 60 Hz for 120V models; 100 volts ac, 15 amp single phase, 50Hz for 100V models; and 230 volts ac, 10
amp single phase, 50 Hz for 230V models.
OPERATING CONTROLS
Off/On/Start Switch
OFF - (upper position) Switching to this position stops all operation of the
grinder.
ON - (middle position) The switch will return to this position after a grind
cycle has begun and will remain in this position after grinding has ceased.
START - (lower, momentary position) Pressing the switch to this position
and releasing initiates a grind cycle.
P2947
Batch Selector Switch
Select Small, Medium or Large batch by turning the round selector knob
on the left front of the grinder.
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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 - Unplug grinder before removal of any panel or grind chamber housing parts.
2. Empty all beans from the hopper.
3. Plug-in the grinder, place funnel with filter into funnel rails. Press the Off/On/Start switch to the “START” lower
position and release. Run a few grind cycles until all the coffee in the grind chamber is dispensed and disconnect
grinder from the power source.
4. Remove the funnel with filter and carefully tip the grinder over on it’s back.
5. Loosen the three #10-32 screws holding the cone. Rotate the cone clockwise and remove.
6. Remove the two #10-32 screws securing burr housing cap assembly to the burr housing and remove burr
housing cap assembly.
7. Remove load disc and slide rotor with lower burr, spring and brass bushing off of the motor shaft.
8. Clean the grind chamber and all parts with a dry non metallic bristle brush and wipe with a dry clean cloth.
9. Reinstall brass bushing (flanged end first), spring and rotor with lower burr onto the motor shaft. Reinstall load
disc flat side toward rotor and burr housing cap assembly to the burr housing.
10. Refer to Initial Set-up/Adjustments section to vary grind or weight of dispensed coffee if necessary.
COFFEE GRINDING
1. Set the Rotary Batch Selector Switch for the desired batch size and visually inspect the hopper for an ample
supply of whole bean coffee.
2. Carafe brewing: Place a paper filter into the brew funnel. Insert the funnel into the rails and push until it stops.
3. French Press brewing: Place French Press on grinder base and push towards rear until it stops.
4. Momentarily press Off/On/Start switch to the "START" lower position and release. The grinding action will stop
automatically after the preset amount of ground coffee is dispensed into the funnel.
5. Remove the funnel from the grinder and level the bed of grounds by gently shaking.
6. The loaded funnel is now ready for use in any commercial drip coffee brewer according to the manufacturer’s
instructions.
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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
be followed by an adjustment of the timer dials.
SE - F
INE
AR
Burr Adjustment
CO
1. Unplug the grinder and empty all beans from the hopper(s).
2. Plug-in the grinder, place funnel with filter into the funnel rails. Momentarily
press the Off/On/Start switch to the “START” (lower) position (with desired
hopper selected) and release, run a few grind cycles until all of the coffee in the
grind chamber is dispensed.
3. Remove the funnel with filter and carefully tip the grinder over on it’s back.
BUNN
4. Place the Off/On/Start switch in the “START” (lower) position and, using the
grind adjustment key provided, slowly turn the adjusting screw in a clockwise
P1073
direction until a metallic whine is heard due to the rubbing of the grinding burrs. (It may be necessary to start
more than one grind cycle to obtain the sound).
5. Make a mark with a pen on the decal to note the position of the arrow on the grind adjustment screw.
6. The following settings approximately correspond to the CBC recognized grinds. All are referenced from the
arrow position marked in step #5.
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 10 hash marks in a counterclockwise direction.
NOTE: Exact adjustment will vary according to bean roast or added flavoring.
Timer Adjustment
SMALL
MEDIUM
LARGE
1. Unplug the grinder and remove the rear cover.
2. Set each timer to 5 seconds for each ounce of ground coffee desired.
3. Verify the setting by weighing a few samples.
Use this 5 second per ounce figure as an APPROXIMATE guide only.
P2946
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WIRING SCHEMATICS
L1
SCHEMATIC WIRING DIAGRAM
FPG
B
L
K
2
W
H
I
BLK
3
AMP
SELECT SW.
3
TIMER
A
RED
WHI/BLK
BLK
WHI/BLU
WHI/BRN
WHI
GRN
1
BLK
RED
WHI/BRN
WHI/BLU
LG
MED
N
GREEN
DC
MOTOR
SM
BLK
WHI
RED
RED
P2
1
2
3
4
5
6
P2
1
2
3
4
5
P3
1
2
3
4
RED
WHI/BLK
BLK
WHI/BLU
WHI/BRN
WHI
BLK
RED
WHI/BRN
WHI/BLU
BLK
WHI
RED
RED
120 VOLTS AC
2 WIRE
SINGLE PHASE
60 HZ
6
36783 051104
L1
SCHEMATIC WIRING DIAGRAM
FPGA
B
L
K
2
R
E
D
BLK
3
AMP
SELECT SW.
3
TIMER
A
RED
WHI/BLK
BLK
WHI/BLU
WHI/BRN
WHI
GRN
1
BLK
RED
WHI/BRN
WHI/BLU
LG
MED
N
GREEN
BLK
WHI
RED
RED
DC
MOTOR
SM
P2
1
2
3
4
5
P3
1
2
3
4
BLK
RED
WHI/BRN
WHI/BLU
BLK
WHI
RED
RED
230 VOLTS AC
2 WIRE
SINGLE PHASE
50/60 HZ
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36783 051104
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