N&W Global Vending Krea, Установка - Использование - Обслуживание

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© by N&W GLOBAL VENDING S.p.A.
18
03 - 2011 3685 00
ESPRESSO UNIT
After each start-up of the machine, the coffee unit per -
forms a full rotation before performing the normal cycle in
order to ensure that the device is positioned in the initial
position.
c
offEE DispENsiNg cyclE
If a coffee-based selection is requested, the grinder is
activated until the coffee doser chamber is full.
When the doser is full, the coffee dose is released into
the infusion chamber which is located vertically inside
the coffee unit (see Fig. 20-1).
The gear motor engaged on the pinion (6) lets the cranks
(5) rotate, which cause the infusion chamber (1) to rotate
by 30°.
The upper piston (4) aligns itself with the infusion cham-
ber (21 -7) and descends inside it. The position where
the piston stops for the infusion will depend on the quan-
tity of ground coffee in the chamber.
At the end of the coffee dispensing phase, the upper
piston goes down in order to mechanically squeeze the
coffee pod, facilitating the expulsion of excess water
through the 3rd route of the dispensing solenoid valve.
At the end of the cycle the gear motor is activated in the
opposite direction, lifting the upper piston and rotating
the infusion chamber towards the emptying side, on the
opposite side of the dispensing side; the lower piston (8)
rises.
Once the emptying position is reached, the gear motor
inverts its rotation direction again, bringing the infusion
chamber back to the idle position.
The scraper (3) holds the coffee pod and lets it fall, while
the lower piston (8) returns to the idle position.
Fig. 20
1- Upper piston
2- Coffee outlet nozzle
3- Scraper
4- Rods
5- Cranks
6- Pinion
7- Used coffee slide
8- Unit covers
Fig. 21
1- Upper piston
2- Coffee outlet nozzle
3- Scraper
4- Rods
5- Cranks
6- Pinion
7- Infusion chamber
8- Lower piston
2
1
3
4
5
8
6
7
1
3
8
2
7
5
4
6