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The infusion group is part of the NEO (New
Engine Optimization), that guarantees high
performance while reducing the energy
consumption of the machine. Hence this
group is different from common systems
with thermosiphon circulation. In fact, the
temperature of the group is ensured by the
presence of a heating element cartridge.
In addition, the thermal insulation prevents
heat dispersion.
The group is equipped with:
A heating element cartridge of 300 W;
A temperature probe that communi-
cates with the control unit;
Two 135°C high-limit thermostats con-
nected in series with the heating ele-
ment;
A three-way solenoid valve called coffee
valve.
The group section shows:
Water supply into the group.
Heating element.
Coffee valve.
Pre-infusion chamber.
Water outlet.
The machine is provided by the SIS (Soft
Infusion System). It optimizes the extraction
and compensates any tamping errors so
that it reduces waste and makes regularly
perfect coffees. It is based on the pre-in-
fusion chamber, that increases the time
in which water without pressure wets the
coffee cake to provide a uniform extraction.
A cylinder in the chamber limits the space
and the dripping of water after the end of
extraction.
How does the water flow work? The water
enters the group (A) and the coffee valve
lets it pass through (C). Then the water fills
the pre-infusion chamber in about 3 sec-
onds (D) and, in the meantime, the coffee
cake is reached by the water (E) and is
naturally wet. Once the chamber is filled,
the pressure of 9 bar reaches the coffee,
initiating the extraction into the cup.
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