Necta Astro, Installation, Operating And Maintenance Manual

Page: 18 / 84

© by NECTA VENDING SOLUTIONS SpA
14
0210 206-00
STANDARD SETTINGS
The vending machine is supplied with the following set-
tings:
- coffee temperature (at the spout) approx. 85-89°C;
- instant product temperature (at the spout) approx. 75°C;
The machine standard settings assign the same price,
expressed in number of basic coins, to all selections.
ADJUSTING THE BREWING
CHAMBER VOLUME
When the upper piston is correctly positioned, the coffee
unit can operate with coffee doses of 5.5 to 8.5 g.
To change the piston position (see Fig. 19) do as follows:
- remove the snap ring from its seat;
- place the piston in the proper adjusting notches:
.less deep notches for 5.5 to 7.5 g doses;
.deeper notches for 6.5 to 8.5 g doses.
Fig. 19
1 - Snap ring
2 - Upper piston
3 - Reference fins
ADJUSTING THE COFFEE DOSE
The dose adjusting lever can be positioned in one of the 6
reference notches bearing in mind that:
- the dose is increased by lifting the lever:
- the dose is reduced by lowering the lever:
- every notch changes the dose by approx. 0.25 g.
In addition, when the lever is fully rotated upwards, the
ratchet can be released from the groove in the dose
regulator (see Fig.20) and replaced into a different groove
to change the average dose setting to:
- low 6 g ± 0,5
- medium 7 g ± 0,5
- high 8 g ± 0,5
To take the dose it will be sufficient to remove the coffee
unit and use the special function from the “test” menu in
“Technician” mode (see relevant paragraph).
Important notice!!!
To refit the coffee unit, pay special attention to the
piston position. Reference notches on the external disk
and on the unit case should match (see Fig. 23).
ADJUSTING THE WATER TEMPERATURE
The boiler temperature is controlled by the software and can
be adjusted directly from the menu.
ADJUSTING THE GRINDER
When a variation in the grade of grinding is desired, turn the
relevant adjusting knob on the grinder (see Fig. 20) and
more specifically:
- turn the knob anticlockwise for coarser grinding;
- turn the knob clockwise for finer grinding.
For optimum results, it is good practice to vary the grade of
grinding with the coffee grinder motor running.
N.B.: After adjustment of the grade of grinding, at least
2 test selections must be performed in order to check
the new granulometry of the ground coffee:
the finer the grade of grinding the longer the time necessary
for dispensing the coffee and vice versa.
Fig. 20
1 - Coffee grinder
2 - Grinding adjusting knob
3 - Dose regulator
4 - Dose adjusting lever
5 - Reference notches