La Marzocco linea Bedienungsanleitung Seite 18

from 20 to 35 minutes, depending on
the size of machine), which will be
subsequently maintained at a constant
value automatically.
During this time, the pointer of the lower
scale on the pressure gauge (part 3, fig.
1 or 3; or part 4 fig. 2) may reach as
high as 11-12 bar; this may occur any
time that, while activating the groups, the
motor pump forces cold water into the
coffee boiler at a pressure of 8-9 bar and,
simultaneously, the temperature controller
regulating the temperature of the boiler
itself switches on the heating elements
in order to bring the water contained in
such boiler up to operating temperature.
However, in this case it is necessary to
adjust the expansion valve (Fig. 4, part
19A) in such a way that the pressure may
never exceed 12 bar.
Brewing after first installation
Once the first installation procedures are
finished, before proceeding with brewing
coffee, hot water and steam, please follow
these steps:
• Engage the portafilters by inserting
them into each group, brew water through
each group for at least two minutes.
• Being careful to avoid burns, turn on
each steam wand for at least one minute.
• Turn on the hot water valve for the
time necessary to allow the following
quantities of water to be brewed:
- At least 1 liter for a 1/2 group machine
- At least 2 liters for a 3 group machine
17
- At least 3 liters for a 4 group machine
COFFEE BREWING BUTTON (fig.1 part 5)
For EE model - fig. 1
Take a portafilter and place some
ground coffee in the filter itself: the
suggested amounts (in grams) to use
are laser-marked on the actual filters.
Press down on the ground coffee with
the supplied tamper and engage the
filter holder in the group and then press
the switch (part 5) thus allowing coffee
to be brewed; when you have obtained
your desired amount of coffee, press the
switch again (part 5), at which point
the machine discharges the pressure built
up in the filter holder. The holder may
then be removed to proceed with making
another coffee, as required.
For PADDLE model - fig. 2
Take a portafilter and place some ground
coffee in the filter itself: the suggested
amounts (in grams) to use are laser-
marked on the actual filters. Press down
on the ground coffee with the supplied
tamper and engage the portafilter in the
group. Move the paddle handle of the
group from right to left (part 1)
allowing coffee to be brewed; when you
have obtained your desired amount of
coffee, return the paddle handle back to
original position on the right-hand side,
at which point the machine discharges
the pressure built up in the portafilter.
It may then be removed to proceed with
making another coffee, as required.
order to pre-infuse the coffee in the filter,
once the portafilter has been engaged in
the group, move the paddle handle only
half way from the right to left for a few
seconds, then move all the way to the left
in order to brew your espresso/s, until the
desired dose is released in the cup, then
turn off by returning the paddle handle to
its original position on the right-hand side.
For AV model - fig. 3
It is essential to program the quantity
of water delivered by performing the
following operations with the utmost care.
In case of doubt or difficulties, please
contact our technical service.
Introduction
COFFEE BREWING CONTROL PANEL (part. 5 fig 3)
The coffee metering system is based
on the amount of water which will be
delivered onto the ground coffee, already
thus set in the filter and the portafilter, which
is measured through a water volume
control system, which is located above the
In