User guide

© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
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ROCKET ESPRESSO
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- GIOTTO EVOLUZIONE A CLOSER LOOK
GIOTTO EVOLUZIONE A CLOSER LOOK GIOTTO EVOLUZIONE A CLOSER LOOK
GIOTTO EVOLUZIONE A CLOSER LOOK
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The Giotto Evoluzione runs hot, but not too hot,
unlike many other Heat Exchanger (HX) machines.
Due to the compromise of any HX machine,
between continuously available steam and
production of brew water for espresso. The
pressure in the boiler is directly related to the
temperature, a higher pressure gives higher
temperatures. Because of the way HX machines
work most require a cooling flush prior to
drawing the first in a series of espressos, the
Giotto Evoluzione in common with other
machines of this type also requires this “cooling
flush”. However,
However, However,
However, Giotto did not need as large a
Giotto did not need as large a Giotto did not need as large a
Giotto did not need as large a
coo
coocoo
cooling flush as
ling flush as ling flush as
ling flush as many HX
many HXmany HX
many HX machines
machines machines
machines
You can alter the pressure/temperature of the
boiler if required; I found the factory settings
I found the factory settingsI found the factory settings
I found the factory settings of
of of
of
1.0 bar to be less than optimal for brewing or
1.0 bar to be less than optimal for brewing or 1.0 bar to be less than optimal for brewing or
1.0 bar to be less than optimal for brewing or
steaming. I raised it to 1.2 bar which was far
steaming. I raised it to 1.2 bar which was far steaming. I raised it to 1.2 bar which was far
steaming. I raised it to 1.2 bar which was far
better and all Bella Barista m
better and all Bella Barista mbetter and all Bella Barista m
better and all Bella Barista machines will be factory
achines will be factory achines will be factory
achines will be factory
set to 1.2 bar.
set to 1.2 bar.set to 1.2 bar.
set to 1.2 bar.
As long as a cooling flush is performed, the Giotto
Evoluzione makes consistently good espressos
and easily maintains the temperature during the
pour. HX recovery is fast enough that domestic
volumes of espresso will be absolutely no
problem, but not
notnot
not too fast, giving advanced users
scope to use this recovery time to try for different
optimum brew temperatures depending on the
coffee used.
As a rotary pumped machine with a balanced
bypass, brew pressure when tested was set to 9.0
bar and was stable, but could easily be adjusted
to whatever you desire. The take of for the brew
pressure gauge is at the pump head and outside
the sealed brew circuit (the correct place), so
unaffected by water expansion effects.
It’s nice to have really hot water on tap, recovery
time after drawing hot water for an Americano is
very fast. Although I always say for regular hot
water production a kettle is a better option in
areas where lime scale is a problem and saves
having to descale your machine so often.
The E61 group is an industry standard (as are
many of the components in the machine), so
parts such as, pumps, gaskets, shower screens,
filter holders, filter holder handles etc. are all a
standard size and readily available from multiple
suppliers. This also means that the pricing of
these spares is highly competitive.
The Giotto Evoluzione has reasonable steam
performance; it takes a little while to get used to
steaming, especially with smaller quantities of
milk.
Pressure Settings
Espresso
Steam Production
Hot Water
The E61 group
Using the
Gio
tto Evoluzione
–
simple and easy to use!
I felt the Giotto did not need as large a
cooling flush as many HX machines