Maintenance And Periodic Cleaning Operations - La Marzocco Linea EE Betriebsanleitung

7. Maintenance and Periodic Cleaning Operations

WARNING
THE MACHINE MUST BE INSTALLED SO THAT
qUALIFIED TECHNICAL PERSONNEL CAN EASILY
ACCESS IT FOR MAINTENANCE.
CAUTION
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.
Cleaning groups and drain wells
Insert the blind filter into portafilter and
put the correct amount of espresso cleaning
product (following the product's instruc-
tions) into the filter, engage the portafilter
into the group you want to clean.
• Press the brewing button for said group,
as if you were making a regular cup of
coffee. Stop the water after about 15-20
seconds.
• Start and stop the group several times
until you notice clear water being released
instead of soapy water when you remove
the portafilter.
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 through
it several times.
19
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.
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 appro-
priate 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 portafilters (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 engaged.
• Make one cup of coffee in order to remove
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 imprinted parts in
order not to damage them.
Cleaning the hot water and steam nozzles
Steam nozzles must be cleaned immedia-
tely 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 infu-
sion filter. To clean, you must first remove it
by unscrewing the retainer screw, then soak
in espresso detergent powder.