N&W Global Vending Colibri UL 120V, Use And Installation Manual

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© by N&W GLOBAL VENDING SpA 02-2007 266 00
OPERATION
PRE-SELECTIONS
According to the layout settings, it is possible to have
different pre-selections; the available pre-selections for
each layout are indicated in the selection dose table
supplied with the machine.
Decaffeinated
This pre-selection is used for choosing whether the next
coffee based selection will be with decaffeinated type
coffee.
Syrups (with syrup kit only)
This pre-selection is used for choosing whether to add
syrup to the next selection.
Sugar (only for models with sugar dispenser)
This pre-selection is used, in unsweetened selections, for
adding sugar to the next selection
COFFEE DISPENSING CYCLE
After each time the machine is switched on, the coffee unit
is rotated completely before the normal cycle to ensure
that the device is in the correct start position.
According to the layout settings of the machine, the dis-
pensing cycle can be:
- With single grinding and single coffee release:
The grinder operates until filling the coffee doser chamber.
When the doser is full, the ground coffee dose is released
into the brewing chamber (1) positioned vertically (see fig.
17).
- With double grinding and double coffee release:
The grinder operates until filling the coffee doser chamber.
When the doser is full, the ground coffee dose is released
into the coffee brewer unit. The grinder starts for a second
grinding cycle and the dose is released again into the
brewing chamber (1) positioned vertically (see fig. 17).
After the release of ground coffee dose(s) is completed,
the ratiomotor handle engaged with the disk (2) located
outside of the assembly rotates by 180", making the brew
chamber swing and lowering the upper piston (3) (see fig.
18).
Due to the water pressure, the pre-brewing spring (5) sinks
and the lower piston (4) goes down 4 mm, thus forming a
water cushion which allows an even use of the coffee dose.
At the end of the dispensing cycle and during a pause of 3
seconds, the pre-brewing spring (5) will discharge the
water through the third way of the dispensing solenoid
valve, lightly pressing the used coffee dose.
By completing its rotation, the ratiomotor makes the swing-
ing lever (6) lift the pistons and the coffee dose.
At the same time, when the brewing chamber returns to its
vertical position, the scraper on the coffee hopper stops
the used coffee dose and drops it.
The lower piston now returns to the bottom dead centre.
Fig. 17
1 - Brewing chamber
2 - External disk
3 - Upper piston
4 - Lower piston
5 - Pre-brewing spring
6 - Swinging lever
7 - Markers
Fig. 18
1 - Brewing chamber
2 - External disk
3 - Upper piston
4 - Lower piston
5 - Pre-brewing spring
6 - Swinging lever