English
10
La Marzocco, S.r.l. Firenze, Italia
V1.3
1) Cleaning groups and drain wells
- Put a tablespoon of detergent powder for coffee machines
into the blind filter, supplied with the machine, and tighten it
onto the group you want to clean by using a normal filter holder.
- Activate the automating rinsing (backflushing) routine (see
the Software Programming Manual for more detailed
instructions)
- Rinse the group using a normal filter, by running hot water
through it several times.
2) Cleaning filters and filter holders
- Put 2 or 3 teaspoons of detergent powder for coffee machines
in about 1/2 a litre of water inside a heat-resistant container
and boil.
- Dip filters and filter holders in the boiled solution and leave
them fully submerged for about 30 minutes.
- Rinse thoroughly with clean water and run hot water through
one group several times with the filters in place.
- Make one cup of coffee and discard in order to remove any
unpleasant flavor.
3) Cleaning the drain collector
Remove the drain tray grill at least twice a week and clean, pull
out the water drain collector and clean it thoroughly. Inspect
and clean the drain well also, and remove any leftover grounds.
4) Cleaning the body
Wipe the stainless steel surfaces with a soft, non abrasive
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.
5) Cleaning the hot water and steam nozzles
Steam nozzles must be cleaned immediately after use with a
damp cloth and by producing a short burst of steam so as to
prevent the formation of deposits inside the nozzles themselves,
which may alter the flavor of other drinks to be heated. Hot
water nozzles must be cleaned periodically with a damp cloth.
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.
Diffuser
Screen
Group
Assembly
Diffuser
Screw
6) Cleaning the Diffuser Screen
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 diffuser screen. To clean
it, you must first remove it by unscrewing the diffuser screw.
Put 2 or 3 teaspoons of cleaning detergent for coffee machines
in about 1/2 a litre of water inside a heat-resistant container
and boil. Place the diffuser screen(s) and diffuser screw(s) in
the solution and leave them fully submerged for about 30
minutes. Rinse thoroughly with clean water. Install and run hot
water through each group several times with the screen
installed.
7) Water Pump
Whenever you are brewing coffee, and you can adjust the pump
pressure by turning the by-pass screw (below the plug located
on the side to which the pump power supply is connected)
clockwise to increase and counter-clockwise to reduce
pressure. Adjust pressure only when at least one group is
brewing coffee.
Note:
When the heating element in the coffee boiler is energized, the
water will expand increasing the start-up pressure. Once the
maximum pressure is reached, the expansion (safety) valve
should start working by discharging a few drops of water, in
order to prevent such pressure from exceeding 11-12 bar.
In case the pressure exceeds 12 bar, you must adjust the
expansion valve by unscrewing the cap slightly. If this is not
sufficient, remove the valve and clear away any calcium
deposits. This remedy is valid also in case the valve remains
open in the drain position (i.e. the pressure cannot increase to
8 bar approx.).
8) Water Filter/Softener
Please see the documentation that accompanied the water
filter/softener for the proper operating and cleaning instructions.
6. Preventative Maintenance and Weekly Cleaning
Do not remove the portafilter when its relative group is brewing
hot liquids. The Coffee Boiler contains water at elevated
temperature. Water temperature over 125 F / 52
can cause
severe burns instantly or death from scalding.
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C
Operators Manual - ENG - V 1.3.pmd
30/10/2006, 14.34
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