Background information
Operating principles
The Elektra Micro casa semiautomatica operates like a commercial
espresso machine. When the coffee brewing pushbutton is pressed,
water is pumped from the water tank so it passes through a tube
inside the boiler (called a
heat exchanger
). The hot water in the boiler
heats the water passing through the heat exchanger to the correct
temperature, where it goes into the group head and through the coffee
grounds into the cup. That is, the hot water passing through the coffee
grounds does not come from the boiler.
The boiler is filled from the water in the water tank, which is done by
pressing the boiler water supply pushbutton to operate the pump.
This machine allows 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 semiauto
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Содержание Micro Casa Semiautomatica
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