ELEKTRA Micro Casa Mini Verticale, Руководство по обучению, Страница: 11 / 11

Background information
Operating principles
The Elektra micro casa mini verticale has features normally only found
on a commercial espresso machine. When the coffee brewing
pushbutton is pressed, water is pumped from the boiler into the group
head and through the coffee grounds into the cup. During this
process, water is pumped from the water tank into the boiler. Correct
pressure and temperature are maintained automatically. When the
boiler is heating, the element indicator lamp is on.
Steam is produced in the boiler by operating the steam button to
cause the boiler element to come on. Note that sometimes it is not
necessary to operate the steam button, as the boiler pressure and
temperature will be high enough to produce steam.
This machine does not allow the user to extract coffee and froth/heat
milk at the same time.
The group head
The coffee handle fits into the group head, with water flowing through
a “shower screen”, as below. If the basket is too full, the grounds will
press against the shower screen, stopping the handle from being
fitted to the group head.
shower screen
locating lug
Coffee handle and group head.
Water passes through the shower screen to give an
even flow of water through the coffee grounds.
The coffee handle has two lugs either side that locate into two slots in
the group head. The handle is fitted by aligning the lugs and slots,
then pushing the handle up so it can be twisted to the right.
When the coffee handle is fitted into the group head, a rubber ring
inside the group head seals against the top of the filter basket. It’s
therefore important to make sure the top of the filter basket is
clean
and free of coffee grounds . Otherwise leakage can occur, and in
some cases the rubber seal can become dislodged due to a build-up
of coffee grounds behind the seal.
Training manual – Micro casa mini verticale
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