Metos GR 12 User manual

FETCOis a trademark or trade name of Food Equipment Technologies Company. All other trademarks or trade names are
trademarks or trade names of their respective owners.
©2005 Food Equipment Technologies Company Part # P010 Revised November 10, 2005
Coffee Grinder
GR 12
Installation-and User manual

2
Table of Contents
Contact Information .............................................. 2
Product Description/Features................................ 2
Technical Data...................................................... 2
Grinder Specifications ....................................... 2
Dimensions & Utility Connections.......................... 3
Installation ............................................................ 3
Operating Procedures........................................... 4
Service ................................................................. 4
Warranty ........................................................... 4
Principles of Operation ...................................... 4
Adjustments ...................................................... 5
Wiring Diagrams ................................................... 8
Parts..................................................................... 9

Contact Information
FETCO
Food Equipment Technologies Company
600 Rose Road
Lake Zurich •IL •60047-0429 •USA
Internet: www.fetco.com
Phone: [phone] (US & Canada)
[phone]
Fax: [phone]
Email: [e-mail]
[e-mail]
Product Description/Features
GR-1.2- Single Hopper Coffee Grinder
With 2 Portion Sizes
GR-1.3- Single Hopper Coffee Grinder
With 3 Portion Sizes
GR-2.2- Dual Hopper Coffee Grinder
With 2 Portion Sizes Per Side
GR-2.3- Dual Hopper Coffee Grinder
With 3 Portion Sizes Per Side
 Ditting slicing type grinding burrs
 Self adjusting brew basket holder
 Fully automatic, with digital timer control
 15 lb. hopper capacity
 Front accessible & Service Friendly
 Overload motor protection
 Anti-static Outlet Chamber
 Ditting slicing type grinding burrs
 Self adjusting brew basket holder
 Fully automatic, with digital timer control
 Two 5 lb. removable hoppers
 Front accessible & Service Friendly
 Overload motor protection
 Anti-static Outlet Chamber
Technical Data
Grinder Specifications
GR-1.2& GR-1.3 GR-2.2 & GR-2.3
Hopper Capacity: 1 x 15 lbs. / 1 x 6.8 kg. 2 x 5 lbs. / 2 x 2.3 kg.
Timer Range: 00.1 sec. – 999.0 sec. 00.1 sec. – 999.0 sec.
Grind Rate* Per. Minute: 18 oz. / 510g 18 oz. / 510g
Grind Setting Default: Medium Medium
Brew Basket Size Range: 7” to 9” diameter 7” to 9” diameter
Electrical: North America:
120 VAC, single phase
5.2 amps, 0.67 HP
NEMA 5-15P plug/cord
Export:
220 VAC, single phase
5.2 amps, 0.67 HP
North America:
120 VAC, single phase
5.2 amps, 0.67 HP
NEMA 5-15P plug/cord
Export:
220 VAC, single phase
5.2 amps, 0.67 HP
*Grind rate is determined at medium grind with medium size, average to dark roast beans

3
Dimensions & Utility Connections
Installation
Warning: Read this User’s Guide before installing. Damage caused by improper installation will not be
covered under warranty.
1. Inspect the container for visual or hidden damage. The carrier must be notified of any punctured or
damaged cartons immediately.
2. Install the grinder in selected location making sure surface is level, and that grinder will fit. Caution: Never
push equipment against cords or wall outlets.
3. Remove cord from inside hopper and plug into the back of the grinder.
4. Before plugging grinder into 120 volt, 15 amp. wall outlet make sure
outlet is not overloaded, a dedicated circuit is preferred.
5. Following the operating procedures below test grinder for proper
operation.
6. If you need further assistance please call our Technical Support
Dept. at 800-338-2699 or e-mail [e-mail].
Warning: To prevent
electrical shock, t his
unit must be properly
grounded.

4
Operating Procedures
1. Turn grinder on/off switch to the on position.
•The power switch will illuminate to indicate that the grinder has power and is operational.
2. Fill the hopper(s) with whole coffee beans.
•The GR-2 models have two 5lb. removable hoppers. These hoppers must sit squarely on the floor
of the hopper chamber. When placing the hoppers inside the hopper chamber make sure chamber
is clear of stray whole beans and debris. The hoppers will not sit properly if this is not done.
•Both hoppers must be placed into the grinder before operating grinder; and plastic covers must be
on hoppers.
3. Place the brew basket with paper coffee filter in the plastic holding arms.
•The plastic arms will hold all FETCO brew baskets up to 52H models; and will fit most all other
manufactures.
•All other sizes, FETCO recommends placing paper coffee filters on lower shelf and grinding
directly into filter.
4. Press portion switch. (Factory Defaults)
•Small portion: 4 ounces
•Medium portion: (Available only on GR-1.3 and GR-2.3.) Approximately 6 ounces
•Large portion: 8 ounces
5. Allow grinder to complete its cycle then remove brew basket from plastic holding arms.
Cleaning:
a) Use stainless steel cleaner on all stainless steel surfaces. (Never use abrasives on these surfaces.)
b) Use damp cloth on other surfaces. Use mild detergent as needed.
c) Removable hoppers on GR-2 models are dish washer safe (the covers are not).
d) After washing hoppers FETCO recommends hand drying them.
Service
Warranty
All FETCO grinders come with a limited warranty. All warranty service must be authorized by calling the Technical
Support Department at [phone]. A Return Authorization number will be issued for all parts replaced under
warranty.
Principles of Operation
Timing Systems:
The timing system consists of the programmable digital timer board, the start switch, the hopper solenoid (GR -2
models only), the solid state capacitor, and the grinder motor.
When the start switch is pressed, the timer starts its’ cycle.
GR-1
The timer energizes the capacitor, and the motor is then energized.
When the timer finishes its cycle, it removes voltage from the capacitor, and the motor. The grind cycle timed
sequence is complete.

5
GR-2
The timer energizes the hopper solenoid; which opens the guillotine on the removable hopper, which allows coffee
beans to drop into the grinding chamber. The timer also energizes the capacitor which energizes the motor.
When the timer finishes its cycle, it removes voltage from the hopper solenoid, which closes the guillotine on the
removable hopper. The capacitor and the motor are on an adjustable delay (See Programming section). This delay
ensures that all beans have passed through the grind chamber, preventing cross contamination of different
coffees. After the delay, voltage is removed from the capacitor and the motor. The grind cycle timed sequence is
complete.
The power/stop switch is used only when it is necessary to interrupt the grind cycle before the cycle is finished.
Grinder Foreign Object Protection
FETCO coffee grinders feature two types of overload protection to prevent damage to the unit if a foreign object
enters the grinding chamber and stalls the motor.
• The control board is equipped with a thermal breaker with an audible alarm that will cut power to the motor
if the control board overheats.
• The motor is equipped with a thermal breaker (no alarm) that will cut power to the motor if the motor
overheats.
Once the foreign object is removed and the unit cools down, the thermal breakers will automatically reset.
Warning: If this occurs DO NOT TRY TO FIX THIS PROBLEM YOURSELF. Immediately unplug the grinder and call a
qualified service technician.
Adjustments
Grind Adjustment
These adjustments are to be made by qualified service personnel only.
The grinder is factory set at medium grind.
If adjustment is necessary:
• Remove all whole beans from hopper.
 GR-1: Scoop out as many of the beans as possible.
Then lift the window straight up and sweep out the
remaining beans.
 GR-2: Remove both hoppers and dump beans out, place both
hoppers back in grinder.
• Select large portion switch and activate. This will clear grind chamber of all whole coffee beans.
• Remove the front cover making sure to remove all four screws (2) in front (2) underneath next to coffee
outlet.
• Using a 7/8” or 22 mm wrench turn retaining nut counter-clockwise at least one turn.
• Using a 3/8” to 1/2” standard screwdriver turn the adjustment screw clockwise for a finer grind, counter-
clockwise for a coarser grind. Note: Do not exceed more than a 1/4 turn in either direction.
• Using a 7/8” or 22 mm wrench turn retaining nut clockwise locking adjustment screw in place.
• Using a small amount of whole coffee beans test to make sure grind setting is correct if not repeat the
above steps.
Note: It may be necessary to adjust the timer cycle to compensate for the effect that the grind setting can make on quantity of coffee ground per
minute. A finer grind will produce less ground coffee per minute and a coarser ground will produce more ground coffee per minute.
To return grind setting to factory settings:
• Follow the first four steps of the grind adjustment procedure.
• Turn adjustment screw clockwise until burrs meet, back off slightly.
• Using a marker, mark the twelve o’clock position of the adjustment screw.
• Turn the adjustment screw counter clockwise to just past the four o’clock position.
• Turn retaining nut clockwise locking adjustment screw in place.
• Test by running small batch.
Fine
Coarse

6
Beginning in August 2003, the control board for the GR-1 & 2 Series grinders was changed. The following
programming instructions apply only to new models with software version 0.9 and above. For earlier
models, see the User’s Guide that was supplied with the unit.
The Programming Instructions are also on a label on the underside of the lower cover.
Programming Instructions – Software Version 0.9 and Above
 Turn the power switch off.
 Remove the lower cover.
 Turn the power switch on.
The currently programmed model number will flash
briefly. (example: 12 = GR-1.2, 23 = GR-2.3)
 Then, if the software default settings are currently
programmed, the display will read DEF. If not,
the display will be blank.
 Hold SET for 5 seconds, until the display reads SET.
 Release SET, the software version will be displayed.
(Example: 0.9, 1.0, etc.)
 Press SET. The display will read TYP briefly,
followed by the currently programmed model number.
Press the UP and DOWN buttons until the correct model
number is displayed. (GR-1.2 = 12, GR-2.3 = 23, etc.)
 Press SET. The display will read DEF.
Press SET to skip this section.
To reset the unit to factory default settings, hold SET for
5 seconds, until STO is displayed briefly. This will exit
programming mode. To re-enter programming mode, hold
SET for 5 seconds again.
 Press SET. The display will read DLY briefly,
followed by the current motor delay setting in seconds.
(GR-2.2 & 2.3 only)
Press UP and DOWN to adjust.
 Press SET.The first switch number will be displayed
briefly, followed by the current setting in seconds.
Example: LH1 = Left side small batch, 7.0 seconds
 Press SET. The next switch number will be displayed
briefly, followed by the current setting.
Example: LH2 = Left side medium batch, 13.5 seconds.
 Continue this way until all switches are programmed.
See the chart for switch designations.
 Important! To save your changes and return to operating
mode, you must hold SET for 5 seconds until the display
reads STo.
23
TYP
SET
DEF
LH1
LH2
7.0
13.5
X
.X
23
DEF
STo
STo
8.0
CONTROL BOARD
DLY
MOTOR DELAY
This sets the time that the motor
continues to run after the hopper
doors close on GR-2 series
grinders. This delay ensures that
all beans have passed through
the grind chamber, preventing
cross contamination of different
coffees.
Default setting: 8 sec.
SWITCH DESIGNATIONS
Model GR- 1.2 1.3 2.2 2.3
Left Small LH1 LH1 LH1 LH1
Left Med. LH2 LH2
Left Large LH3 LH3 LH3 LH3
Right Small RH1 RH1
Right Med. RH2
Right Large RH3 RH3
DEFAULT SETTINGS
Small – LH1/RH1 = 7 sec.
Med. – LH2/RH2 = 13.5 sec.
Large – LH3/RH3 = 20.0 sec.

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Approximate grind times for medium size, average to dark roast beans.
Batch Size Typical Coffee Dosage Timer setting
(seconds)
Notes Notes
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.
Factors in the whole coffee beans such as: age, size, oily or dry, and degree of roast will affect grind times.

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Wiring Diagrams
GR-1
Effective August 2003

9
GR-2
Effective August 2003