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vesuvius userguide10 June 2015.doc
Page 16 of 24
Information Technology Solutions
V
ESUVIUS OWNERS MANUAL
Programming/examining pressure profiles
(cont.)
Not all phases have to be used, enter a 0 time and
that phase will not be used. The screens that follow
show the rest of this example profile
.
Phase 7 is
unused shown by a value of 0 seconds
. It is not
necessary to put 0.0 bar as well.
One useful tip
, if just a small change is desired,
after touching the "Tick" Icon to save the value,
raising and lowering the brew lever returns you to
the Main menu screen.
Profile advice
The Vesuvius has advanced pressure profiling
capabilities but everyone's taste is different, so
some suggestions to get you started below
assuming a pump acceleration value of 400
(factory setting)
. Always remember, although you
have 7 phases for each profile, you don't have to
use them all.
Phase 1 Preinfusion times for the first low
pressure phase
You can choose to move straight to maximum
pressure, but the Vesuvius benefits from a
preinfusion phase.
Note: the preinfusion chamber
within the E61 group has been disabled, as it's
operation interferes with pressure profiling.
Preinfusion, times shorter than 3 seconds will be
ineffective as this will mainly be lost in filling the
inactive preinfusion chamber in the E61 group and
the space above the coffee puck. The filling of the
redundant E61 preinfusion chamber also makes a
pre-flush unnecessary prior to pulling a shot.
Preinfusion times of 6 - 14 seconds have given good
results. With better grinders, even longer times may
be of benefit. Preinfusion pressures can be anything
you want, but not lower than 2 bar, testing has
mainly been with 2 bar preinfusion pressures. Early
testing did not show any benefits with pressure
lower than 2 bar due to low flow rates from the
pump.
One of the reasons the Vesuvius always supplies
the pump from it's internal tank, is to allow
preinfusion pressures lower than mains line
pressure (usually much higher than 2 bar).
