6
Function of the machine
The main components of the espresso coffee
machine are the following:
BOILER
Contains hot water and steam.
COFFEE DELIVERY GROUP AND
HEAT EXCHANGERS
The delivery group is the component
where the filter holder is inserted. The hot
water enters the delivery group, where the
processes of pre-infusion, infusion and delivery
of the coffee take place. The machine
comes with a heat exchanger for the delivery
group. The heat exchanger is fitted in the
boiler and it’s purpose is to heat up the fresh
water coming from the tank to the correct
temperature.
HEATING SOURCE
An electric heating element warms the water
in the boiler.
ELECTRIC PUMP
This component is to increase the water
pressure to the correct water pressure needed
for espresso coffee preparation which is
9 bar.
STEAM WAND
This wand delivers hot steam for milk
frothing and steaming of drinks in jugs (tea,
chocolates, etc.)
HOT-WATER TAP
This delivers hot water.
CONTROL & MONITORING DEVICES
Pressure gauge
Indicates the boiler pressure and the
working pressure of the pump.
Pressure switch
This is used to keep the boiler water
temperature constant by controlling the
heating elements, based on the boiler
pressure.
Automatic Boiler
Water Level Control: Electronic circuitry
used to keep the boiler water
level constant.
HYDRAULIC CIRCUIT
The hydraulic diagram shows that the
water used for the preparation of coffee
comes directly from the fresh water tank
and is heated in the heat exchanger
inside the boiler.
Electric Diagram
The machine is connected to the electric mains by a supply cable.
As shown on the electric diagram there are two circuits:
- A feeding circuit for electric components (solenoid valves, pump
motor, electronic control panel.
- A feeding circuit for the heating element.
ATTENTION: In all cases, this appliance must be connected to a 3 pin
power point or a hard wired (direct wired) power source. The use of
extension leads or loose type connectors is strictly forbidden
and unlawful.
