4.4 Brewing unit
The brewing unit forms the central element in the espresso machine.
Operating principle:
The capsule cage (C) encloses
the coffee capsule (D) from
above and presses the edge
of the capsule cage against the
pyramid plate (F). The capsule
cage and coffee capsule form the
pressure-tight brewing chamber.
Three spikes (B) in the upper part
of the capsule cage pierce the
aluminium jacket of the coffee
capsule. Hot water (A) is forced
under pressure by the pump into
the brewing chamber. The
pressure inside the coffee
capsule increases and bursts the
membrane (E) on the underside.
The coffee is brewed in the coffee
capsule and is conveyed into the
holder (G) and then to the coffee
outlet (H) via the pyramid plate
(F).
Note:
A dirty pyramid plate (F) impairs
the run-out and taste of the
coffee.
4.4.1 Pyramid plate
The water pressure inside the coffee capsule increases and bursts
the membrane on the underside. The coffee is brewed via the
pyramid plate and conveyed to the coffee outlet.
A dirty pyramid plate impairs
the run-out and taste of the
coffee.
If the coffee is only dripping out
of the coffee outlet, the
pyramid plate could be dirty
and clogged with coffee
residue.
To clean the pyramid plate, start a coffee brewing process without a
capsule.
To clean the pyramid plate manually, remove the capsule holder
together with the pyramid plate. Re-insert the pyramid plate in the
correct position.
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