USER MANUAL
Speedster
page 11
The extraction can be further manipulated by switching the lever from lower to middle position near the
end of the extraction phase. Water pressure will then decrease to approximately 3 bar (line pressure)
but remains at that level.
The progressive pre-infusion cylinder has the extra advantage that clean water in the cylinder is
pushed through the group valve into the discharge after each extraction, thus rinsing the valve.
Note
Filling of the steam/hot water boiler is disengaged during brewing (brewing lever in middle or lower
position) in order to prevent differences in extraction pressure.
Shot timer
when the group valve is active (open) for longer than 0.1 second, a timer first re-sets to zero and then
starts to count. The display (see
Figure U 2
) will show the seconds passed since the valve was
opened. It does not distinct between pump active or inactive. The shot timer may help you to
determine the optimum grinder setting and coffee grounds dose to reach a perfect espresso (25-30
seconds).
Figure U 2. The shot timer display.
