La Marzocco LEVA X, Manual

Page: 22 / 98

EN
22
4. Machine Operation and Coffee Preparation
IMPORTANT
To improve the flavor 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 consult the Software Programming
Manual for detailed instructions).
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. The
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 machine 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 machine is designed only
for preparing coffee and hot
drinks.
1) Removing the portafilter when it is under
pressure
You might have to remove the portafilter
while it is subject to the pressure exerted
by water.
This happens in the following two cases:
• The portafilter has been erroneously
filled with an excessive dose of coffee
powder, obstructing the water/coffee flow.
• A flushing with a blind portafilter is
under way.
In these cases you need to operate the
control lever to lift the piston by a few
millimetres, to counteract the pressure
exerted by the spring. Pressure will drop to
the pre-infusion value.
WARNING: pressure will not drop to zero.
Now you can slowly remove the portafilter,
driving the piston downward by means of
the lever.
WARNING: hot water will inevitably flow out,
so:
WARNING
N ever remove the portafilter if:
• delivery is not over
• the pressure read on the relevant
pressure gauge is higher than the
pre-infusion value
• the pressure read on the analogue
or digital pressure gauge exceeds
zero.
To remove the portafilter in one
of the previous cases follow the
indications contained in paragraph
“Removing the portafilter when it is
under pressure”.