Rocket | Cellini | User guide | Rocket Cellini User guide

Inside This Review
The Cellini Classic arrives well packed (Rocket
How it works
Inside the Cellini Classic
A detailed Tour
Key Features
Using the Cellini Classic
Final Thoughts
Espresso use heavy grade packaging and Bella
Barista also double box the machines). The
build quality is good with high quality (industry
standard) components and a good fit and finish.
Constructed using a brushed steel outer case
and chrome plated steel front panel, with a
black painted steel frame inside.
inside. The quality is
noticeable when lifting the machine as the
Cellini Classic is a heavy machine for its size.
This type of heat Exchanger (HX) machine
internally, is slightly more complex than
cheaper non HX machines, but much simpler to
operate. There are fewer controls and no need
to do anything special (apart from filling the
water tank occasionally) to draw steam, hot
water or espresso at any time. The Cellini
Classic automatically maintains the water level
in the boiler as required and if run low on water
in the tank the Cellini Classic switches off the
heating element as a safety precaution, and the
power light flashes (low
(low water alarm).
The machine is attractive and fits comfortably
under standard height kitchen cabinets. The
Cellini Classic compares favourably with other
similar prosumer machines that have a heritage
and reputation for looking good.
Some coffee enthusiasts buy second hand
commercial machines that are very large and
heavy, plumbed into the mains and with 3-6kw
heating elements in 5 litre or larger boilers toT
make quality beverages at home. The Cellini
Classic can make the same high quality drinks,
The details were correct at the time of writing, but the manufacturer and
Bella Barista reserve the right to change the technical specification of
the packaging, machines and any accessories supplied with the
machine (including quantity and type of accessories supplied)
without the hassle.
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Rocket Espresso Cellini Classic closer look v1.doc
Tel: 01933 273275
Page 2 of 13
Overview – cont.
The Cellini Classic went out of production
some time ago and has been reborn under the
care of Rocket Espresso. A legend, built again,
to the same standards, in the same way as
before. The Cellini is a great machine both for
the customer to use and the reseller to
support. It will provide years of reliable service
with the minimum of maintenance. Once in
position on the counter the machine looks nice
and does not dominate on a standard sized
work surface. The height of the machine is very
convenient and gives plenty of room under
standard height kitchen cupboards. It has a
Very well packed inner box, protected by double packing in
aircelll filled outer by Bella Barista
an air
nice large cup warming tray. Placing the Cellini
Classic in a corner is ideal, especially when
Even if you are completely new to coffee making
and this type of machine, you will have no problem
located near the sink.
making all those great coffee drinks in a very short
The Cellini Classic comes well packed, in a
tough box and with comprehensive
documentation covering all aspects of
operation, routine maintenance and production
of espresso based drinks. A valuable addition to
the Italian manufacturer’s written User guide
that comes free with the Cellini Classic.
time The Cellini Classic is easy to keep clean, a
quick wipe with a damp cloth and a buff with a
micro fibre cloth is all that’s required to keep it
looking great. The more complex tasks such as
backflushing and descaling are actually very easy to
do and the supplied Bella Barista user guide
explains how to do them in detail.
The Cellini
Classic,, in the
corner of my
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
Page 3 of 13
How it works
Cellini.. An upright boiler machine is shown, but the
The diagram shows a simplified diagram of the Cellini
principle is identical for the horizontal mounted boiler of the Cellini. The pump keeps the boiler about
60% filled with water that is heated and kept at a pressure of 1.31.3-1.4 bar (about 22 psi). The
temperature of this water is above boiling point and has an area of steam above (similar to a pressure
The pipe for the steam wand is at the top of the boiler (in the steam area) as the steam ta
p is opened,
steam is forced through the steam pipe and as the pressure drops more of the water instantly flashes to
steam, giving a continuous supply.
Hot Water
The pipe for the hot water tap is submerged below the waterline in the boiler. As the hot water
water tap is
opened, steam pressure forces the hot water from the boiler through the pipe and out of the hot water
Coffee Brew Water
Coffee brew water for the group does not actually come from the water in the boiler, but is pumped
nk through a “heat exchanger” (essentially, a big copper tube) that passes through
directly from the ta
the hot boiler. As the cold water from the water tank passes through this tube it is heated to the correct
temperature for brewing coffee.
Lifting the lever starts the pump
ing of brew water, lowering the lever stops the pump and additionally
safely,, (the
releases the pressure (all 140 psi of it) from the group, so you can remove the filter handle safely
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
Page 4 of 13
Inside the Cellini Classic
A close inspection of the Cellini Classic shows a
machine that has all the usual refinements
internally that one would expect. Internal build
quality is good, with great attention to detail.
Components are well positioned, neatly
assembled; all cables are well away from hot
spots and comprehensively tied to avoid
Some internal shots below;
The powerhouse of the machine accessible from the top, with
the removal of only 4 screws near each corner
The vibe pump tucked under the boiler
Removal of the outer case, giv
es easy access to all
components,, e.g. heating element
Clever managements of the tanked water supply
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
Page 5 of 13
A detailed Tour
Pressure relief valve
(Safety valve)
Vacuum breaker
Position of cold
water tank
Brew Boiler
(nickel plated
Hot water
Vent tube
by group
limit stat
Pressure stat,
now with brass
centre adjuster
Hot water take
off at bottom of
OPV Valve, used to
regulate brew
Control box,
autofill, heating
elements etc.
Low water sensor (via
electrical conductivity)
The picture above identifies the major
components of the machine, once the case is
removed accessibility for maintenance is good.
Full removal/refitting of the case is moderately
time consuming
This machine would be fairly simple to work on
for most of the major components requiring
replacement over time.
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
Page 6 of 13
Key Features
Ball Joint steam and water arms (no burn)
Adjustable pressure stat.
Nice quality internal water tank
“Clever” low water sensor and tanked
water supply mechanism
Attractive retro design and brushed
steel case
“non compression” steam & water valves
“No burn” steam and water valves
2 heavy weight quality portafilter
holders and 2 filter baskets as
Height adjustable feet
Chromed Steel external case with plenty of
room for internal components to stay cool.
The case is a good fit, but does require care
during removal and refitting. Access to
some components is quickly achieved from
the top via removal of 4 screws. These
screws are found under the polycarbonate
cup tray surround in small recesses. More
involved maintenance requires case
removal, which is moderately time
Good routing of internal cables and pipes,
avoiding hot spots and areas of vibration
Nice quality nickel plated boiler with good
brazing and thick brass endplates
High quality internal components
All components quite accessible. This
makes servicing easy
Very accessible pressure stat that is not too
sensitive to adjust. This makes pressure
adjustment extremely easy and can be
adjusted without removing the entire case,
just the water tank carrier needs to be
removed (4 screws).
Note the internal cover plate simply has to
have the two screws loosened and slid out
of position prior to adjustment.
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
Page 7 of 13
A nice quality badge. For a change a
machine with a badge that actually is in
keeping with it’s value.
It is even riveted in place, which means it
won’t fall off..something that occasionally
happens on some espresso machines with
constant exposure to heat and steam.
Readers of past reviews will know that I am
not a fan of cheap badges, especially when
stuck on, or even worse, not level.
The steam pressure gauge is clear and
easy to read, it’s also on straight and not
Nice quality cold water tank holding 3 litres
and simply slots in the top, no tubes to
worry about. Refilling can be done with the
tank in or out of the machine and there is a
handy access hatch for filling.
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
Page 8 of 13
Nice large cup warming tray. You can get
plenty of cups on there, definitely no lack of
space. The little hatch for refilling means
you don’t have to remove every cup.
Please note: I have not removed the
protective polythene covering of the
polycarbonate cup tray surround as this is
not my machines. It is an attractive
transparent smoked effect similar to glass.
The Cellini Classic is heavy, because the
internal frame is rigid and constructed with a
quality (thick) steel
I strongly recommend the use of felt
bottomed (or Teflon faced) castor
cups for a few pounds, to make it
easy to move and protect your
worktop. You could also stick
felt/teflon pads directly to the bottom
of the feet
The feet are height adjustable unlike
some of the other models.
The machine is heavy and difficult to
slide around. You will want to slide it
around to refill it if it is under cupboards.
The frame now has some plastic strips
added to cushion against vibration
The drip tray is not the largest I have seen
and holds around 250-300ml before it needs
emptying (it can hold more but you will spill
liquid whilst trying to empty it).
It is all steel and nice quality with the same
brushed finish as the main case..
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
Page 9 of 13
At the default factory settings, the Cellini
is a moderate steamer and steam power
can reduce when foaming larger quanitites
of milk with it’s 2 hole tip. It took some
practice to microfoam smaller quantities of
milk, to the texture I like (aprox 100-120ml)
and would certainly be easier with a single
hole tip or one with smaller holes if you want
to run at the factory default 0.8-1.0 bar
steam boiler pressure.
I have recommended to Bella Barista that
these machines are set to a 1.2-1.3 bar
steam boiler pressure for better
steaming.the only disadvantage will be
a slightly larger cooling flush prior to
pulling a shot (but this is the same for
other prosumer HX machines). The
thermal dynamics of any machine with a
similar specification(and quite common
combination of: 1200W element, 1,8l
horizontal boiler and similar steam tip hole
size, will not steam properly with the
pressures set at 0.8-1.0 bar
Professional quality no compression steam
valve and ball joint “no burn” steam wand. It
was also long enough to reach to the
bottom of all my smaller pitchers.
I like the ball-joint mounted steam and hot
water arms, both of which are “no burn” . I
also like the large knobs with “noncompression valves”, much more tactile and
look good too.
“No Burn” – a wand with an airspace preventing
the walls from heating up when water (or steam)
is drawn. However even these wands do
eventually get hot*BUT cleaning the milk from
the steam wand is MUCH easier.
“non compression” valves - use a spring and
seal to seat. Opening the valve typically “pushes”
the sprung seal open, closing simply allows the
spring to close the valve, there is no
“compression” of a washer as in some taps.
Commonly found in the commercial environment,
because the seals connot be damaged by “hamfisted” operators closing them too tightly.
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
Page 10 of 13
The equipment supplied with the Cellini:
The review machine had 2 portafilter
holders (good quality) with single and
double baskets, measuring scoop
,backflushing blind filter basket, steel
cleaning cloth and the usual plastic tamper
Portafilters are heavyweight, very nice
quality and finished off with a chrome button
in the end of the handle.
The machine switches off the heating element when low on water, the boiler then goes cold and the pump
will not run. However, there is NO audible low water alarm, just 2 visible indications that the machine is off:
A flashing green power light and a slowly decending boiler pressure gauge..
I really think that in a machine of this value, an audible alarm should be added. It can be very irritating to go
to make a coffee only to find that the machine switched off the heating element an hour ago (perhaps due
to a boiler autofill after you leave the kitchen) and then have to wait 20 minutes or more for it to warm up.
It was nice to see a De-Aereator fitted to a
machine as these seem to have gone out of
fashion in recent years (it’s certainly
cheaper for the manufacturer to omit them!).
This device simply bleeds air from the outlet
side of the pump, this prevents air in the
system causing the OPV valve to screech
I believe the reason for OPVs screeching, is air in the brew line,
this is often caused by scale (the reasons for this are beyond
the scope of this review). However, the fitting of a de-aerator can
only be helpful should air enter the brew line for whatever reason.
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
Page 11 of 13
Using the Cellini Classic – simple and easy to use!
The Cellini Classic runs hot, which is usual with
all prosumer Heat Exchanger (HX) machines.
This is because of the tight compromise
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
As long as a cooling flush is performed, the Cellini
Classic makes consistently good espressos and
easily maintains the temperature during the pour.
Domestic volumes of espresso one after another
will be no problem using the Cellini
work most require a cooling flush prior to
drawing the first in a series of espressos, the
Cellini Classic in common with other machines
Hot Water
of this type also requires this “cooling flush”.
It’s nice to have really hot water on tap, recovery
However, I felt the Cellini did not need as large
time after drawing hot water for an Americano is
a cooling flush as many HX machines when at
very fast. Although I always recommend a kettle for
the factory setting of 0.8-1.0 bar, unfortunately
regular hot water production, especially in areas
this was insufficient for proper steaming and at
where lime scale is a problem and saves having to
my recommended setting of 1.2 to 1.3 bar a
descale your machine so often.
normal sized cooling flush is required..
Pressure Settings
The E61 group
You can alter the pressure/temperature of the
boiler if required via the pressure stat and the
machines own boiler pressure gauge allows you
to see the settings. Brew pressure can be
altered by adjustment of the expansion valve,
but as the Cellini has no brew pressure gauge,
you will need to use portafilter pressure gauge
when adjusting brew pressures as part of your
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
annual maintenance routine. The brew pressure
on the test machine was around 10.8 bar, this is
OK although it could easily be adjusted to
around 9 or 10 bar (the good quality
OPV/expansion valve, is quite adjustable). Just
remember to allow for the thermal expansion of
water when measuring pressure in this way. See
Steam Production
The Cellini has moderate steam performance and
in my opinion the boiler pressure needs to be
raised to get suitable steaming performance. This
should be done by Bella Barista prior to you
receiving the machine, if not, I would recommend a
setting of 1.2–1.3 bar.
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
Page 12 of 13
Final Thoughts – so what’s the bottom line!
This was an opportunity to review a machine
But these are minor items on a machine that has
that has been “reborn”. The Cellini Classic is
many admirers and do little to detract from its
being produced to the same plans and standard
day to day operation.
as before. The Cellini Classic was always
considered a very good machine and certainly
nothing has changed. It’s well made and nice
There are people who are going to love the looks
of the Cellini and as a lifestyle choice (for some),
It definitely holds its own against other similar
nothing else will do. It makes a statement,
machines and is one decent machine. I have had
without dominating the setting it’s placed within
my machine on test for nearly 4 weeks and it
and performs as well (or better) than other similar
has performed flawlessly. The reason for such
machines in the prosumer category.
an extended test is Bella Baristas wish to make
the Cellini a core offering within their heat
exchanger range of vibration pump
Its vibration pump is quiet in comparison to most
only bridging the gap between
vibration pumped machines on the market. The
the higher end Giotto, but also the rotary
overall quality of the machine (and components
pumped HX machines. In addition the clean
used) is very good and sits in the higher end of
lines and brushed steel finish of this machine
the prosumer machine category. Water
may suit people who do not want the angles
refilling/management is easier than on some
and chrome finish of the Giotto
machines. Detection of low water level is
excellent (and reliable) and the entire tank is used
before the machine switches off the heating
It’s heavy at around 23kg, but not too large,
element (and pump). The particular water system
although slightly deeper than some machines.
used on these machines also allows the use of a
It’s also not too tall and I do prefer machines
very large 2.9l water tank, a big plus.
that are a little more balanced in this way. A
commercial 1 group (that would make similar
beverages), would be significantly bigger,
The Cellini Classic is a great machine, with great
heavier and overkill for the home user.
retro styling, that any owner would, and should
be proud of. It’s good!
Anything you would change?
As a reviewer, with my 20/20 hindsight, there
were a few things, especially considering the
price of the machine.
A audible low water alarm
A brew pressure gauge as well, or if
space is limited a dual pressure gauge
(one dial for boiler pressure one for
brew pressure).
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
Page 13 of 13
Gallery – A few more pictures of the Cellini Classic
2 high quality
group handles,
with single,
double and blind
group,, just
The beautiful lever operated E61 group
waiting to make that espresso or latte
Removing only the top panel gives
reasonable access and takes a minute,
removing the case takes a little longer and
s very good access for maintenance
© Bella Barista
Bella Barista, Nene Court, The Embankment, Wellingborough, Northants, NN8 1LD
Tel: 01933 273275
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