La Marzocco Linea, Manual

Page: 13 / 23

12
EN
group from right to left (part 1) thus
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. In
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
The coffee metering system is based
on the amount of water which will be
delivered onto the ground coffee, already
set in the filter and the portafilter, which
is measured through a water volume
control system, which is located above
the group assembly flange, where the
group connects to the boiler. Inside each
counter there is a paddle wheel (which
we shall call wheel for simplicity) which
rotates as water flows by.
The sequence of the water cycle is as
follows:
group - counter
counter - solenoid valve
solenoid valve - diffuser
diffuser - coffee brewing spout
The wheel is designed in such a way as to
rotate freely when water is flowing by; it
sends 2 signals, every complete rotation,
to the electronic module which processes
them and activates the solenoid valve
relay of the corresponding group, as well
as the motor pump relay.
Such electronic module also processes
the signal sent by the boiler’s level gauge
and consequently activates the relative
solenoid valve relay of the same motor
pump.
Procedure for programming doses - fig. 3
Programming for the 3D/5 version
Press and hold the button with the spiral
symbol for more than 4 seconds.
You can then follow the same operations
as for the standard version, which are
described in the following.
The LEDs stay on for 5 seconds after
which, if no button has been pressed,
they turn off; you must then repeat the
above-mentioned procedure to turn them
on again and to prepare the electronic
module for programming;
1. Press the first button within 5 seconds
and press it again once you have obtained
the desired amount of coffee; at this
point, the LEDs will turn off and this
button will remain programmed as for the
dose brewed previously;
2. Repeat steps for the other three buttons;
any time a button has been programmed,
by pressing the button with the spiral
again, the LED of the programmed
button(s) will remain switched off.
3. Once you have programmed the first 4
buttons of the first control panel from the
left, the dosage programs set according to
the above will be stored in memory and
the 5th button (the one with the spiral)
will return to its function as a continuous
brewing on/off button.
COFFEE BREWING CONTROL PANEL (part. 5 fig 3)