N&W Global Vending Kobalto, Установка, эксплуатация и обслуживание

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© by N&W GLOBAL VENDING S.p.A.
21
05-2008 3235-00
VarIabLE cHambEr coFFEE UNIt
coFFEE dISPENSINg cYcLE
After having powered on the machine, the coffee unit
will perform two complete rotations at the first selection
before performing a normal cycle in order to make sure
that the device is put into the initial position.
If you request for a coffee-based selection, the grinder
will work for the time required to fill in the brewing cham -
ber with the coffee dose set up via software.
after having reached the dose of ground products, the
ratio-motor engaged on the crank (11) of the unit will
turn by 180°, thus causing the brewing chamber (8) to
swing (see fig. 22).
the pump is started. as a result of the water pressure,
the upper piston (5) will move down just as required to
close the brewing chamber and to compress ground cof-
fee slightly. You can avoid compressing coffee mechani -
cally on the selections using high coffee doses. The pre-
brewing cycle (water delivery and wait time) is started
with programmable values.
the dispensing valve will open to enable the pump to
force the boiler water onto the coffee for the brewing
cycle.
a brewing valve is mounted at the outlet of the chamber
to guarantee a minimum pressure in the brewing cham-
ber. It enables the drink to come out whenever the work-
ing pressure is exceeded.
Fig. 22
Boiler connection tube 1-
Central quick coupler 2-
Upper piston pressurisation tube 3-
Lateral quick coupler 4-
Upper piston 5-
Upper piston gasket 6-
Coffee funnel 7-
Brewing chamber 8-
Lower piston 9-
Brewing valve 10-
Spring for valve 11-
Lock ring 12-
Rocking lever 13-
Crank 14-
Fig. 23
Upper piston 1-
Lower piston 2-
Brewing valve 3-
Drink dispensing channel 4-
Spring for brewing valve 5-
Brewing chamber 6-
Piston return spring 7-
Rocking lever 8-
Crank 9-