Programming The Grinding Time; Grinding Adjustment; Changing The Coffee Grinders - La San Marco SM92 Use And Maintenance

4.3 Programming the grinding time

The electronic control unit controls the grinding time and restarts the grinder-dispenser after a certain number
of batches of ground coffee are dispensed. The unit is programmed by the manufacturer according to
preset values (see table). The grinder-dispenser, started with the push button 3, remains active and stops at
batChes of
grinding
model
time
sm 92-92a 80 s
sm 97-97a 80 s
sm lK 80 s
sm tK
50 s
the electronic control unit, which controls the grinding time, is located inside the grinder-dispenser.
• Set, in agreement with the user of the appliance, the grinding time and the number of impulses to start/
stop grinding.
• To set the agreed parameters, adjust the dip switches located inside the electronic control unit (see fig-
ure). Dip switches 1 and 2 control the grinding time; it is possible to set a grinding time from 30 to 120
seconds. Dip switches 3 and 4 control the impulses given by the coffee dispensing lever; it is possible to
restart the grinder-dispenser after 6, 12, 18 or 24 batches dispensed.
dip sw
dip sw1
Configuration
ON
Off
OF
ON
On
OF
ON
Off
OF
ON
On
OF

4.4 Grinding Adjustment

Instructions for a proper adjustment:
• Fill the hopper 4 with the coffee beans and open the gate 6.
• Start the grinder-dispenser by pressing the push button 3. Grind a small amount of coffee and switch off
the unit by pushing the stop button 3.
• Check the fineness of the ground coffee. Make one or more cups of espresso coffee and check the coffee
served into the cup (the "ideal" quantity for brewing a cup of espresso is 6 to 8 grams of ground coffee,
with a time of 25 to 30 seconds). There may be three different cases:
a) The coffee brews too slowly: the coffee is ground too fine (it should be coarser). To make a coarser grind,
press the release button 9 and turn the adjustment ring 10 clockwise.
b) The coffee brews too fast: the coffee is ground too coarse (it should be finer). To make a finer grind, press
the release button 9 and turn the adjustment ring 10 counterclockwise.
c) The coffee brews at the proper speed.

4.5 Changing the coffee grinders

when changing the coffee grinders, the adjusting ring nut must be inserted so that the hopper locking screw
(1) does not interfere with the grinders stop pin (2).
The proper grinder change procedure is as follows:
Loosen the hopper locking screw completely and pull out the hopper.
Loosen the three M5x12 grub screws located on the grinder support ring nut and remove the adjusting ring nut.
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the end of the preset grinding time or is stopped by the action of the
overflow limit switch, which resets the timer. The grinder-dispenser
ground
Coffee
starts again after a certain number of batches of ground coffee,
based on the impulses given by the lever 15, and stops at the end of
12
the preset grinding time or, as already mentioned, it is stopped by the
action of the overflow limit switch. The installer can modify the set-
12
tings on the electronic control unit if the user of the appliance
requests different parameters from those preset by the manufacturer.
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Instructions for a proper adjustment of the grinding time:
• Disconnect the power supply.
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• Lean the grinder-dispenser on one side and remove the bottom;
dip sw2 time
Off 30 s
Off 50 s
On 80 s
On 120 s
dip sw
dip sw3
Configuration
ON
Off
OF
ON
On
OF
ON
Off
OF
ON
On
OF
dip sw4 batChes
Off 6
Off 12
On 18
On 24