NERO / NERO INSTANT
Page 38
Version 1.4 / January 2018
ТМ
Espresso group brewing camera with motor volume increase (option)
1. Open the vending machine door
2. Insert the service key into the door contact (see section 3.2)
3. Press the service keypad and hold down the button of the technician’s menu until the sound is heard
(see figure 5.2 pos.10)
4. Select item
[1.9.14 Grinding settings]
. Then select here
[1.9.14.1 Adjustable dose]
and set the
value
[Vario-brewer]
.
ATTENTION! To select this value at the vending machine the special espresso group with motor-
ized changing of the brewing camera volume option should be installed. Otherwise, when select-
ing this value the vending machine will show an error and will stop making coffee-based drinks.
5. Set the required ground coffee dosage value from 7 to 15 g in tenths of gram (from 70 to 150).
6.The values set in item 5 permit programming the ground coffee dosage in the recipe.
Fig. 5.15a - Vario-brewer without protection
ATTENTION!
Before activating the Vario-brewer mode, adjust the dosing unit in such a way that one
coffee portion will be 7 g sharp (if the dosing unit permits adjusting the values to 6.8
and 7.2, select 6.8 g) for more information contact the service center.
ATTENTION! It’s prohibited to switch the vario-brewer off in the vending machine set-
tings when the vario-brewer is connected!
When replacing circuit boards first switch the vario-brewer off, adjust the settings, and
only then connect the vario-brewer (with power supply switched off)!
For vending machines with a vario-brewer without protection (see figure 5.15a):
When removing the vario-brewer it’s PROHIBITED to install it back in zero position.
When installing in the position, which is not zero, first initialize the vending machine with the brewer
connector disconnected (to bring it to the zero position, then switch off the power supply, connect the con
-
nector and switch the vending machine again)!
Failure to observe these requirements may lead to the vario-brewer and vending machine breakdown.
Should you have any questions about the vario-brewer operation consult the supplier service center.
For vending machines with vario-brewer with protection (see figure 5.15b):
When removing and re-installing the vario-brewer in the vending machine, special protection is trig
-
gered.
The principle of protection is the following:
If the installation is incorrect, the geared motor-reductor, in the initialization mode, the ‘‘zero’’ position.
When the gears coincide, the geared motor is lowered to the nominal position.
Thus eliminating cases of breakdown of the vario-brewer.
Fig. 5.15b - Vario-brewer with protection
