© by N&W GLOBAL VENDING S.p.A. 18 10 2009 3325 - 00
At the end of the coee dispensing cycle, the upper pis-
ton will move down to mechanically compress the used
coee dose, thus helping water in excess to come out of
the 3rd way of the dispensing solenoid valve.
At the end of the cycle, the ratio-motor is driven in the
opposite direction, thus lifting the upper piston and rotat-
ing the brewing chamber to the unload side, opposite the
dispensing side; the lower piston (8) will move up.
After having reached the unload position, the ratio-motor
will reverse the direction of rotation once again, thus
moving the brewing chamber back into its standby posi-
tion.
The scraper (3) will retain and drop the coee dose
whereas the lower piston (8) will move back into its
standby position.
On the models complete with two dosers, the chamber
will slightly move before dispensing to help ground prod-
ucts move properly; the movement is programmable by
using the corresponding function.
seTTing conTrol and regulaTion
To achieve the best results compared with the product in
use, it is recommended to check:
- The used coffee dose shall be slightly compressed and
moistened.
- The granulometry of the ground coffee.
- The ground coffee dose.
- The dispensing temperature.
- The water dose.
Brewing chamBer volume
The coee unit can work with coee doses between 5.5
and 8.5 gr.
The upper piston will automatically position.
coffee dose regulaTion
The lever for dose regulation can be arranged in one of
the 10 reference notches. Please keep the following in
mind:
- if you lift the lever, the dose will increase:
- if you lower the lever, the dose will decrease:
- every single notch will vary the dose by ca. 0.35 gr.
To take the dose, just remove the coee unit and use the
corresponding function of the “test” menu in the “Techni-
cian” mode (see the relative paragraph).).
Important!!!
The dose you can achieve will indicatively range be-
tween 6 and 9.5 gr; if you vary the grinding degree, the
dose will also slightly change.
Fig. 24
1- Upper piston
2- Coffee outlet nozzle
3- Scraper
4- Connecting rods
5- Cranks
6- Pinion
7- Brewing chamber
8- Lower piston
Fig. 25
1- Dose regulation lever
2- Reference notches
3- Coffee doser
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