PORTOFINO RESTYLING
rev.4 - 03/2008
TECHNICAL DESCRIPTION
Overview of the espresso coffee machines Portofino Range
Automatic coffee machines: Portofino Digit
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Espresso coffee machine with microprocessor controlled electronic measured dosage
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Digital programming from the push-button pad.
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Available in 1, 2, 3 and 4 group models.
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Automatic boiler filling is standard.
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Filter for mixed use either with ground coffee or with coffee pod upon request.
Semiautomatic coffee machines:
• Portofino P
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Semi-automatic espresso coffee machine with continuous delivery.
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Available in 1, 2, 3 and 4 group models.
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Automatic boiler filling upon request.
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Filter for mixed use either with ground coffee or with coffee pod upon request.
• Portofino Cam
Semi-automatic espresso coffee machine with continuous delivery and with little level operation. Available in 2, 3 and 4 group models. Automatic boiler filling
upon request. Filter for mixed use either with ground coffee or with coffee pod upon request.
Operating Principles
An espresso coffee machine is basically made up of the following elements:
Boiler
Is used to contain the hot water and steam and is made of copper so that its properties do not deteriorate over the years.
Brewing group and heat exchanger
The brewing group is the component which, when attached to the filter holder (containing the filter and the ground coffee or the coffee pod), brews and delivers
the beverages when supplied with hot water.
The heat exchangers, one for each group, are immersed in the water and are used for fast heating of the fresh water from the network to the optimal temperature
and to prevent thermal imbalances within the system.
Heat source
This is normally provided by an electric heating element immersed in the boiler and/or by an external gas burner, which heat the water and provide the ste-
am.
Electric pump
This device is used to raise the pressure of the network, which is normally inadequate for the purpose, to a pressure of 9 bars which is ideal for making the best
coffee.
Steam taps
These allow steam to be delivered to give the indispensable “froth” to the milk used for preparing cappuccino, for heating water and punches and for preparing
chocolate drinks.
Water tap
It allowswater to be delivered for preparing hot drinks, tea and tisanes.
Control instruments
Manometers:
show the current pressure in the boiler and the pump’s operating pressure.
Pressure switches: control the pressure and switching on of the heat sources to keep the boiler water temperature constant.
Level gauge:
shows the water level in the boiler.
Operation of the Brasilia coffee machine
Hydraulic diagram
As can be seen from the hydraulic diagram, the water for preparing the coffee is not taken from the boiler, but comes directly from the water mains and is heated
in the heat exchangers by the heat of the water contained in the boiler.
Wiring diagram
The machine is connected to the power supply network by means of the electric cord supplied. As we can see from the wiring diagram, there are two circuits:
- power supply circuit for the operational electric components (solenoid valves, pump motor, electronic control centres).
- power supply circuit for the boiler heating element.
The main switch
The machine is fitted with a three-position power switch:
Position 0: no power supply to the internal components
Position 1: power supply to the operational electric components
Position 2: power supply to the operational electric components and to the boiler heating element
Position 1 of the main switch should also be used when the boiler is heated only using gas.
