User manual for NERO / NERO INSTANT
Page 19
Version 3.2 / December 2017
3.5.9 Coffee grinder and dosing apparatus (for NERO)
The coffee beans are crushed using the coffee grinder, which is located underneath the coffee bean
container. When you select a drink, which uses coffee beans, the beans fall into the coffee grinder, where
they are ground using the built-in choppers, going further into the dosing apparatus, which is located in
front of the coffee grinder. From here the coffee is fed into the espresso group.
The quality of grinding of coffee depends on the rotation of the
screw, located on the coffee grinder (see figures 22 and 23 posi
-
tion1). Turn the screw clockwise grind more (smaller particles) or
counter clockwise to grind less (larger particles) – (see figure 22).
You can set the rotation of the coffee grinder to achieve the re-
quired level of grinding.
After setting the grinding quality, check the quality of coffee. If
needed please set again to achieve the required level of grinding.
NOTE: the smaller the particle size the longer will be the extract
and the drink will be more saturated.
Setting the grinding parameters for the first time
:
Turn the regulatory screw clockwise and bring the blades as
close as possible (turn all the way).
Then turning the screw counter clockwise loosen the upper disk by
540-630 degrees (one and a half turn or one and a half + quarter
turn).
For more detailed settings of coffee grinder you can carry out
the following actions I the given sequence: change the position of
the regulatory screw (to change the position of the upper disk of the
coffee grinder to a certain angle) and then make a drink and taste it.
PLEASE NOTE THAT CHANGES IN LEVEL OF GRINDING
AND TASTE ARE NOT NOTICED RIGHT AWAY. ONLY AFTER 3
CYCLES YOU CAN FEEL THE DIFFERENCE (after changing the
grinding parameters, discard two drinks and taste the third one to
feel the difference).
It is highly recommended to change grinding parameters dis-
creetly, turning the coffee grinder’s disk by 10-20 degrees each
time.
Figure 22 - Adjustment of grinding
d. Boiler
The boiler is used to heat the water to a certain tempera-
ture as is set in the machine’s configurations.
The boiler in the machine is placed in the rear section of
the vending machine’s body (see figure 10 position 8 and fig
-
ure 21). To access the boiler, remove the vending machine’s
rear panel.
The surface of the boiler can be very hot.
Before starting any routine service or cleaning, it is nec-
essary to cool down the boiler and to empty it (see section
3.6.3).
Electromagnetic
Boiler
Figure 21
1
2
Figure 23