English
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La Marzocco, S.r.l. Firenze, Italia
V1.3
2. Definition of Available Models
2) General Description
The machine is built in 2, 3, and 4 group versions and is
essentially composed of the following parts:
1) Steam Boiler (produces steam and hot water)
2) Coffee (“saturation”) boiler
3) Brewing groups
4) Exterior Cover
5) Water pump
3) Description of the various parts
•
Steam Boiler
The Steam Boiler consists of a cylindrical tank, of varying
length according to the number of coffee groups, which is
made of AISI 300 series stainless steel. Each unit is
subjected to a hydraulic test, at a pressure of 6 bar, and has
an operating pressure of 1.3-1.5 bar. The following is a list
of effective volumes and power ratings according to the
number of groups installed:
2 groups
7.0 liters
2000 or 3000 Watts
3 groups
11 liters 3000 or 4000 Watts
4 groups
14,5 liters
3000/3800 or 5000 Watts
Covers are installed at either end of the cylindrical tank and
on one of them there is a housing for the water heating
element, which allows the steam boiler to operating
pressure within approximate 25 minutes. Operating
pressure is maintained by a pressure switch or a
temperature probe. The steam boiler has various fittings
used for safety devices, for supplying hot water and steam,,
and for the heating element.
•
Coffee Boiler
The Coffee Boiler consists of a cylindrical tank, of varying
length according to the number of coffee groups, which is
made of AISI 300 series stainless steel.
Each unit is
subjected to a hydraulic test, at a pressure of 18 bar, and
has an operating pressure of 9 bar. The following, table is a
list of effective volumes and power ratings according to the
number of groups installed:
2 groups
3.4 liters
1400 Watts
3 groups
5.0 liters
1600 or 1900 Watts
4 groups
3.4 + 3.4 liters
1400 + 1400 Watts
(2 Boilers Installed)
Covers are installed at either end of the cylindrical tank and
on one of them there is a housing for the water heating
elements. The temperature of the coffee boiler is maintained
by an electronic temperature controller (PID capable) with
an accuracy of 0.2°C. The brewing groups are installed on
the boiler.
•
Brewing Groups
They consist of a precision casting made of stainless steel.
The brewing group accepts the portafilter used to hold the
ground coffee; the espresso flows through the brewing
group, through the portafilter basket, through the portafilter
spout, and into the cup(s) after the brewing button has been
pressed.
•
Exterior Cover
It consists of a stainless sheet steel body for the GB/5 and
painted plastic for FB/80. The structure has been the object
of specific studies to provide good aesthetics, to lower
ergonometric costs for the operator and to reduce the chance
of damage to a minimum.
•
Water Pump
The water pump, is a differential pressure, “positive-
displacement” type installed on the water supply tubing and
is set-up to operate anytime the coffee groups are activated,
and through an electric level gauge whenever the steam
boiler needs to be replenished.
The Coffee Boiler and Steam Boiler contain water at elevated temperature.
Water temperature over 125 F / 52
can cause severe burns instantly or
death from scalding.
(Coffee Boiler 200 F / 93.3
- Steam Boiler
F / 127
)
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Operators Manual - ENG - V 1.3.pmd
30/10/2006, 14.34
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