La Marzocco linea Bedienungsanleitung Seite 25

Do not remove the portafilter when group is
actually brewing water.
• Rinse the group using a normal filter in
the portafilter, by running hot water throu-
gh it several times.
Cleaning filters and filter holders
With daily cleaning of the stainless steel
filters and portafilters it is sufficient to
clean them with water and a cloth or
appropriate brush. Otherwise, using an
espresso cleaning product, following the
product's instructions put the correct dose
in about 1/2 a litre of water inside a heat-
resistant container and heat.
• If using stainless steel portafilters
with snap-on spouts remove the spout.
Immerge filters and metallic parts of por-
tafilters (not handles) in the hot solution
and leave them submerged for about 30
minutes.
• Rinse thoroughly with clean water and
run hot water through the group several
times with the filter and portafilter enga-
ged.
• Make one cup of coffee in order to remo-
ve any unpleasant flavour.
Cleaning the drain collector
Remove the drain tray grill every night,
pull out the water drain collector and
clean it thoroughly. Also inspect and clean
the drain well (part 19) at least twice a
week, and remove any leftover grounds
with a tablespoon.
Cleaning the body
Wipe the stainless steel surfaces with a
soft cloth in the direction of the glazing
marks, if any. Do not use any alcohol or
solvents whatsoever on painted or imprin-
ted parts in order not to damage them.
Cleaning the hot water and steam nozzles
Steam nozzles must be cleaned imme-
diately after use with
a damp cloth and
by producing a short
burst of steam (being
careful to avoid burns)
so as to prevent the
formation of deposits
inside the nozzles themselves, which may
alter the flavour of other drinks to be
heated.
Cleaning the diffuser screens (infusion filter)
Due to filter holder discharge operations
(subsequent to coffee brewing), a certain
amount of coffee grounds may slowly
build-up on and obstruct, even partially,
the infusion filter. To clean, you must
first remove it by unscrewing the retainer
screw, then soak in espresso detergent
powder.
DIFFUSER SCREEN /
SCREW
INFUSION FILTER
DIFFUSER - fig. 5
Motor Pump
The motor pump is of the positive-displa-
cement type and can develop a pressure of
14 bar. The operating pressure is 8-9 bar
and is factory preset during testing; howe-
ver, such pressure may vary from place to
place since the pump pressure is affected
by the incoming water mains pressure. You
must always check the pressure itself by
looking at the lower scale on the pressure
gauge (part 3, fig. 1 or 3; part 4, fig. 2)
whenever you are brewing coffee, and you
can increase such pressure, as required, by
turning the by-pass screw (below the plug
located on the side to which the pump
power supply is connected) clockwise, or
reduce it by turning the screw counter-
clockwise. Adjust pressure only when at
least one group is brewing coffee.
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