N&W Global Vending Krea Installation - Use - Maintenance page 24

OPERATION
i
NfusEr uNit
After each start-up of the machine, the infuser unit per-
forms a full rotation before performing the normal cycle in
order to ensure that the device is positioned in the initial
position.
The infuser can dispense espresso drinks (coffee be-
ans) and fresh brew (pre-ground coffee or tea)
D
ispENsiNg cyclE
By requesting:
- an espresso selection 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 infuser unit.
or
- a fresh brew selection,the pre-ground portion of the
product is dispensed directly into the infuser unit.
The gear motor engaged on the pinion lets the cranks
rotate, which cause the infusion chamber to rotate by
30° as well.
The upper piston aligns itself with the infusion chamber
and descends inside it.
The position where the piston stops for the infusion
- will depend on the quantity of ground coffee in the infu-
sion chamber for the espresso selections
or
- it will be fixed and in the highest possible position in the
infusion chamber (low infusion pressure) for the fresh
brew selections
Depending on the requested selection, the beverage will
come respectively from the espresso nozzle or the fresh
brew nozzle.
At the end of the 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
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 holds the coffee pod and lets it fall, while
the lower piston returns to the idle position.
© by N&W GLOBAL VENDING S.p.A.
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Fig. 17
1- Upper piston
2- Fresh Brew nozzle
3- Espresso nozzle
4- Scraper
5- Rods
6- Cranks
7- Pinion
Fig. 18
1- Fresh Brew nozzle
2- Upper piston
3- Espresso nozzle
4- Infusion chamber
5- Scraper
6- Lower piston
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09-2013 4485-00