La Marzocco STRADA EE Operating Manual - page 13
EN
13
In normal operating conditions, the
coffee boiler pressure transducer, while
brewing, can read anywhere from 0-12
bar when brewing.
The steam boiler pressure is visible
through a pressure gauge placed inside
the machine, behind the control and the
1st group.
When the steam boiler reaches
operating temperature, the light on the
Tea dispense button will switch on.
3) Brewing after first installation
Once the first installation procedures are
finished, before proceeding with brewing
coffee, hot water and steam, please
follow these steps:
• Engage the portafilters by inserting
them into each group, brew water
through each group for at least two
minutes.
• Being careful to avoid burns, turn
on each steam wand for at least one
minute.
• Turn on the hot water valve for the
time necessary to allow the following
quantities of water to be brewed:
- At least 1 liter for a 1/2 group machine
- At least 2 liters for a 3 group machine
4) Installing the portafilters
Install the portafilter(s) by inserting them
into the group and rotate the handle
from left to right. When the portafilters
are inserted properly, you can move the
manual brew paddle lever (part 12, page
5) to start the flow of water through the
portafilter. You should allow hot water to
pass through the empty portafilter(s) for
a few seconds each time, in order to pre-
heat the portafilter.
Note: It is important to leave the
portafilters installed in the espresso
machine when not in use. The portafilter
must remain heated for the brew process
to function correctly.
5) Brewing coffee
Now you can brew an espresso. Disengage
one of the portafilters, fill the filter with
ground coffee, tamp the ground coffee
with the tamper supplied (exerting a force
of 20 kg) and
re-engage the portafilter to the group.
Turning the paddle on top of the group
clockwise will open the solenoid and start
the pump. If the pre-infusion function is
enabled, (see page 36) the paddle will also
activate this function.
Note: Some baristas believe it is
important to press the brewing button
prior to installing the portafilter to allow
the water to flush any remaining coffee
oils and particles from the group. Some
also flush just after brewing coffee for
the same reason. Please experiment to
find the best possible procedure for you.
6) 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
Filter Basket
Porta Filter
O-ring Gasket
Double Spout