17
EN
4. Appliance Operation and Coffee Preparation
IMPORTANT
To improve the flavour of the espresso,
the temperature of the water in the coffee
boiler and therefore of the groups may
eventually be raised or lowered via the
digital display (please refer to Software
Programming Manual for detailed
instructions).
Once installation has been completed, you
can proceed to hook up the filter holders
called “portafilters”, together with their
filters, to the bottom of the groups by
rotating them from left to right. Before
operating the various switches and thus
powering up heater elements, fill up the
boiler tanks with water, as follows:
1. COFFEE BOILER
Water flows into coffee boiler directly,
as soon as the water system and purifier
taps are opened. Since inflowing water
will compress the air in the boiler, it
will be necessary, in order to completely
“saturate” the boiler-groups assembly, to
remove group cover plate and to slightly
unscrew the small bolts called “bleed
screws” so as to allow air to escape until
a few drops of water leak out (see the
diagram below). This should be repeated
for each group, then tighten the bleed
screws again and reinstall the cover.
2) STEAM BOILER
Automatic fill system is switched on by
turning the main switch to position “1”,
so that the steam boiler, through solenoid
valve and motor pump activation, will be
filled up to a preset level, which can be
selected by adjusting the probe inside the
boiler itself.
N.B.
It may happen that the air inside the boiler
builds up a certain pressure level (which
can be detected through the pressure
gauge). In order to deal with this issue,
turn the appliance off and bleed the air
from the groups (see the previous page for
instructions).
Once you have completed these operations,
turn the main switch to position “2” and
wait for the boilers to reach operating
temperature and pressure (which takes
Saturation of group via “bleed screws”
CAUTION
Never remove the filter holder
when water is being delivered.
This operation can be extremely
dangerous since the high
pressure built-up inside the
blind filter would spray out hot
and slightly caustic water, which
may cause severe burns. Coffee
Boiler contains water at elevated
temperature. Water temperature
over 125°F / 52°C can cause
severe burns instantly or death
from scalding.
WARNING
The appliance must not be
dipped in, nor splashed with,
water in order to clean it.
For cleaning operations, please
follow the instructions listed
below very carefully.
WARNING
This appliance is designed only
for preparing coffee and hot
drinks.
