EN
6
1) General description
The machine is built in 2, 3, and 4 coffee
group versions and is essentially composed
of the following parts:
• Steam Boiler (produces steam and hot
water);
• Coffee (“saturated”) boiler;
• Brewing groups;
• Exterior Cover;
• Water pump.
2) 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 liters
3 groups
11 liters
4 groups
15 liters
Covers are welded 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 reach
operating pressure within approximately 25
minutes. Operating pressure is maintained
by an electronic temperature probe with
a PID controller. 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
3 groups
5 liters
4 groups
6.8 liters
Covers are welded 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
The exterior consists of painted and
stainless sheet steel panels. To provide
good aesthetics, to optimize ergonometrics
for the operator and to reduce the chance
of damage to a minimum.
• Water pump
The rotary vane pump, is installed on the
water supply tubing and is set up to operate
anytime the coffee groups are activated,
and through an autofill system whenever
the water boiler needs to be replenished.
• Sound pressure
The weighted sound pressure level of the
machine is lower than 70dBA.
• Water inspection window
The position of this device enables to verify
only water presence inside the steam boiler.
The water level in the window provides a
reference about the water level in the steam
boiler, but doesn’t represent it in a directly
proportional way, 1/3 of the windows is
equal to approximately 1/2 of the boiler.
Summary of Contents for Linea PB
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