Fetco GR Series User Manual - Appendix A
15
Appendix A
Programming Instructions
For GR-1 & GR-2 Grinders manufactured prior to August 2003
Factory Settings:
• GR-1.2
Small batch switch: 13 seconds grind time.
Large batch switch: 26 seconds grind time.
• GR-1.3
Small batch switch: 13 seconds grind time.
Medium batch switch: 19.5 seconds grind time.
Large batch switch: 26 seconds grind time.
• GR-2.2
Small batch switch: 7 seconds grind time.
Large batch switch: 13.5 seconds grind time.
• GR-2.3
Small batch switch: 7 seconds grind time.
Medium batch switch: 13.5 seconds grind time. (plus) 7seconds additional after hopper closes.
Large batch switch: 20 seconds grind time.
Timer Adjustment:
• Remove the base panel
• Press and hold the set button for three to five seconds. The LED display will show SET. (While in the
programming mode the grinder motor and guillotine solenoids are disabled.)
• Select the start switch you wish to reprogram, depress switch. The display will momentarily show the
switch identification (S.I.D.).
Switch Identification:
Model
Sm. Batch
Left
Med. Batch
Left
Lrg. Batch
Left
Sm. Batch
Right
Med. Batch
Right
Lrg. Batch
Right
GR-1.2
LH1 X LH3 X X X
GR-1.3 LH1 LH2 LH3
X
X
X
GR-2.2 LH1
X
LH3 RH1
X
RH3
GR-2.3 LH1 LH2 LH3 RH1 RH2
RH3
• The display will then show the current timer setting for the switch you have selected.
• By pressing the up and down buttons you can now change your timer settings.
• The new programmed time will be automatically saved when you select the next start switch to be
programmed.
• When all Start switches are programmed with the desired settings, press the set button. The display will
then go blank and the control board will return to normal operation.
Note: All changes will be lost if you do not press
the set button.
Approximate grind times for medium size, average to dark roast beans.
Typical Coffee Dosage
Batch Size
Ounces Grams
Timer setting
½ Gallon
2 – 4 oz.
57 – 113 grams
6.7 - 13.3 sec.
2.5 – 3.0 Liters
2 - 4.5 oz.
57 – 128 grams
6.7 - 15 sec.
1 Gallon
4 – 8 oz.
113 – 227 grams
13.3 - 27 sec.
1.5 Gallons
6 – 12 oz.
170 – 340 grams
20 – 40 sec.
2 Gallons
8 – 16 oz.
227 – 454 grams
27 – 53 sec.
3 Gallons
12 – 24 oz.
340 – 680 grams
40 - 80 sec.
6 Gallons
39 – 51 oz.
1.1 – 1.44 kg.
130 -170 sec.
Grind times are affected by conditions of the coffee beans such as: age, size, oily or dry, and degree of roast.
(plus) 7seconds additional after hopper closes.