Once your machine is up to the correct operating temperature, water circulates around the group head and the heat exchanger
using thermal dynamics which maintains the temperature, see the animation on slide 3.
Upon pressing the dose select button the following sequence occurs:
starts and takes the water pressure up to 9 bar.
Group head solenoid opens allowing water into the group handle.
Machine stays in this state until either you stop the group, or the flow meter
informs the control circuit that the correct level has been reached in the cup.
Machine pump stops.
Group head solenoid is switched off which allows the pressure to be relieved through the 3 way valve.