8 – Start-up
IMPORTANT!
Before turning on the machine, be sure to check Sections 5 and 6 of this Manual.
Set the main switch (1) to the "ON" position and automatically the machine will proceed
to fill the boiler to the set level. Once the filling process has been completed, the water
will be heated up to the working temperature and pressure.
Pump pressure regulation (PLUS model):
The pump is factory-set to 9 bar pressure. If it is
necessary to adjust it, proceed as instructed below:
1.
Remove the plastic cap located on the side panel
of the machine.
2.
With the help of a screwdriver, turn the pump screw.
In a clockwise direction, the pressure is increased.
Counter clockwise decreases the pressure (see
Diagram 3).
3.
Check the pump pressure on the pressure gauge
(4) located at the front of the machine.
Regulation of the OPV valve (working pressure of the
coffee pump in the ZERO model):
The OPV valve (15) is a component that regulates the maximum operating pressure
of the machine when making coffee. This pressure
should never exceed 12 bar. The valve is regulated at
10 bar in the factory. If you need to change it, follow the
instructions given below:
1.
Fit the filter holder fitted with the blind filter in the
coffee group.
2.
Start the group up and turn the regulator of the
OPV valve (15) until the reading on the pressure
gauge (4) has reached the required figure. Turning
the regulator to the right increases the operating
pressure, and to the left the pressure decreases
(see Diagram 3).
From this moment, it will be necessary to wait until the temperature of the coffee group
reaches the set point (shown in the specific display of each group (3) dedicated to the
temperature) in order to start making coffee, and until the temperature of the steam/hot
water boiler reaches the set point (the pressure gauge will show a pressure between 1
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