temperature controller (29) is factory
set to 122°.
• Once the working pressure has been
reached, use the group head lever (15).
• Move the group head control lever (15)
fully downwards to stop delivery.
• The machine is now ready for use.
If the water level is too low, the
device automatically stops
all machine functions.
4–3. MANUAL BREWING PRESSURE
ADJUSTMENT
The brewing pressure can be adjusted
manually by turning the pump pressure
adjustment screw (F) (Fig. 4).
To check the pressure during delivery:
• Insert the filter holder containing the
blind filter into the group head.
• Move the group head control lever
(15) and read the pressure on the
pump pressure gauge (4). The correct
pressure is 8/9 bar.
• If the pressure indicated on the
pressure gauge is not correct, turn
the pump pressure adjustment screw
(F) (Fig.4) clockwise to increase or
anticlockwise to decrease the pump
pressure.
4–4. SETTING THE TEMPERATURE
The models are fitted with two PID
temperature controllers (29, 30).
The PID temperature controllers
regulate the temperature of both
boilers, which are programmable and
can be independently controlled.
This system makes it possible to brew
coffee at different temperatures.
The PID temperature controller for the
coffee boiler (29) is factory set to 92°C.
To adjust the setting proceed as follows
(Fig. 7):
• press the button
"PRG" appears on the display, press
; as soon as
23
the button
;
• when the temperature of the boiler
appears on the display, press the
and
buttons to increase
or decrease the temperature from a
minimum of 80°C to a maximum of
133°C.
• 3 seconds after having pressed the last
button, the value is memorized and
the display indicates the temperature.
The PID temperature controller for the
service boiler (30) is factory set to 122°C.
To adjust the setting proceed as follows:
• press the button
"PRG" appears on the display, press
the button
;
• when the temperature of the boiler
appears on the display, press the
and
buttons to increase
or decrease the temperature from a
minimum of 110°C to a maximum of
133°C.
• 3 seconds after having pressed the last
button, the value is memorized and
the display indicates the temperature.
• The PID temperature controller
has been factory set to the right
temperature for making an
excellent espresso.
• If the temperature of the coffee
boiler is set higher than 103°C, the
display (29) will start to flash. This
warns the user that the coffee will
not be good if it is delivered at
such a high temperature.
5. USING THE MACHINE
5–1. PREPARING AND DISPENSING
COFFEE
Once you have carried out the
operations described in section 4.1-4.2,
the machine is ready for use.
; as soon as