Machine Operation And Coffee Preparation - La Marzocco linea Mode D'emploi

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.

4. Machine Operation and Coffee Preparation

WARNING
This machine is designed only for
preparing coffee and hot drinks.
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).
Once installation has been completed, you
can proceed to hook up the filter holders
(Fig. 6) 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 the heater elements, fill up
the boiler tanks with water, as follows:
1. COFFEE BOILER
The water flows inside the coffee boiler
directly, as soon as the water system
and purifier taps are opened. Since the
inflowing water will compress the air in
the boiler it will be necessary, in order to
completely "saturate" the boiler-groups
assembly, to remove the group cover plate
(part 20 Fig. 4) and unscrew the small
bolt (part 21) called bleed screws a little
way so as to allow air to escape until a
few drops of water leak out (see diagram
below). This should be repeated for each
group, then tighten the bleed screws again
and reinstall the cover.
Saturation of group via "bleed screw"
2) STEAM BOILER
By turning the main switch (part 1) to
position "1", the automatic fill system
will be switched on which, by activating
the solenoid valve and the motor pump
(part 15), will fill the steam boiler up to a
predetermined level selected by adjusting
the probe inside the boiler itself.
N.B.
It may happen that the air inside the boiler
builds up pressure (which may be detected
through the pressure gauge - part 3, Fig 1,
2 or 3) To resolve this, turn the machine
off and bleed the air from the groups (see
previous page for instructions). Once you
have completed these operations, turn
the main switch (part 1) to position "2"
and wait for the boilers to reach operating
temperature and pressure (which takes
16