Profitec MOVE - Pre-Infusion

MOVE_BA_V1.0EN - 112
10.3.4 Pre-infusion
Pre-infusion ensures that the ground coffee in the portalter is completely
moistened once before extraction is carried out at high pressure.
There is the possibility of actively (with pump activity) and/or passively
(without pump activity) inuencing the pre-infusion.
How pre-infusion works
At the start of the espresso pulling process, the pump actively builds the
pressure up for a predened period of time. Before the pump pressure has
reached 9bar, the pump interrupts the activity for another predened period
of time. During this passive phase, the hot water completely soaks the ground
coffee. After soaking is complete, the extraction is started at 9bar.
Example
Fig.8 Course of pulling process with and without pre-infusion
1 Green: Course with pre-infusion 2 Red: Course without pre-infusion
If pre-infusion is activated, pump activity starts for 3 seconds after the start
of the espresso pulling process. After these 3seconds, the pump activity is
interrupted for 8seconds (PI pause) in order to moisten the ground coffee.
After these 8 seconds have elapsed, the pump starts up again and the
espresso extraction is started at 9bar for the preset pull time.
If pre-infusion is deactivated, the pump starts up after the pulling process
begins. After the preset pull time has elapsed, the brewing process is ended.
Active pre-infusion
This icon appears when active pre-infusion is in progress.
Passive pre-infusion
This icon appears when passive pre-infusion is in progress.
Activating or deactivating pre-infusion
Pre-infusion is activated or deactivated as a function for the entire machine
via the following menu. The activated function is only effective if pre-infusion