La Marzocco kb90 Series, Manual, Page: 18 / 144

EN
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Filter Basket
Porta Filter
O-ring Gasket
Double Spout
6) Brewing coffee
It is now possible to remove one of the
portafilters to make an espresso beverage.
Place some ground coffee in the filter
itself: 1 dose (approximately 6-7 g) for the
small filter, 2 doses (2 approximately 12-
15 g) for the larger filter. Press down on
the ground coffee with the supplied tamper
and install the filter holder up again to
the bottom of the group and then press a
button to begin the brewing process.
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.
7) Controlling the brew process using volumetric
programming
This espresso machine allows the
volumetric programming of each of the
first two buttons on each group (numbered
left to right). Please consult the
Software Programming Manual for further
instructions.
8) General notes for coffee preparation
The portafilters must remain heated since
they are at the lowest position of the
group itself, and they are partially isolated
due to the rubber gasket between them.
This can be accomplished by leaving the
portafilters installed in the machine when
not in use. The portafilters may also be
actively heated. This procedure may be
carried out by brewing some hot water
through the portafilter then turning off the
water flow, before making coffee.
It is important to remember that coffee left
over in the filters must be removed only
when you need to prepare another cup,
and only at that time should you place a
new dose of ground coffee in the filter.
The size of the coffee granules is extremely
important in preparing a good cup of
coffee, other than the type of coffee mix
used, quite obviously. The ideal grinding
can be determined by making various
coffees using the amount of ground coffee
that you would normally use for each cup
(we recommend at least 6-7g). The best
grinding is that which allows coffee to flow
out from the filter holder spouts neither
too slowly (drop by drop) nor too quickly
(quick light brown flow). A general rule
is that a double dose should dispense
approximately 25cc or 2 fluid oz. of
espresso in approximately 25 seconds.
9) Cup Warmer
Press Cup Warmer Button for enabled or
disabled the cup warmer. This function
work in two modes continuous or timed
(see the Software Programming Manual
for further instructions).
Cup Warmer Button
10) Steam Flush and Flush
If the Steam Flush function is enabled
in the menu, steam will be delivered by
the group with a delay of 2 seconds form
portafilter removal.
If the Flush function is enabled in the
menu, hot water will be delivered by the
group with a delay of 2 seconds form
portafilter removal.
If the Steam Flush and Flush functions are
both enabled in the menu, steam and then
hot water will be delivered by the group
with a delay of 2 seconds form portafilter
removal.