9
♦
Adjusting the pump pressure
In infusion, the pressure must be 9 to 10 bar (0.9MPa et 1MPa)
(gauge green scale).
The pump is located on the right side of the machine and is
adjusted by this same side.
SCREW IN
to INCREASE the pressure,
UNSCREW
to DECREASE the pressure,
♦
Adjusting the water entry solenoid valve
The solenoid valve is located at the top, on the back-right of the
machine. It is necessary to remove the cup heater.
Machine at temperature, launch a cycle (with coffee) continuously
on each unit simultaneously.
Make the boiler fill up (draw hot water). Adjust the maximum
flow rate of the solenoid valve so as not to descend below 7 bar
(0.7MPa).
Then check that the filling time of the boiler is not excessive.
♦
Adjusting the coffee grinding
Wait until the machine has reached the set temperature 0.9 to 1 bar (0.09MPa à 0.1MPa).
It is the finesse of the grinding which determines the time for passing the hot water through the dose. This
time is usually monitored by using the two-cup filter with two doses of coffee.
Average passing time for 2 cups (6 to 7 cl. per cup): 30 to 35 seconds.
- If this time is shorter, reduce the grinding.
- If this time is too long, increase the grinding.
To obtain a good result, use at least 6 g. of (good) ground coffee per cup.
♦
Ambiance lighting
The switch for the ambient lighting is located to the left of the
machine near the basin. It lights up the grille strip, and if your
machine is so equipped, the lighting of the cups. 0=OFF & 1=ON.
♦
Adjustment of mixer tap for the hot water
The mixer tap is located at the top, on the front-right of the machine.
For access, it is necessary to remove the right side.
The temperature range is 55°C to 95°C (131°F à 203°F). To adjust
the desired temperature, use a flat screwdriver. We adjust the
cold circuit electrovalve , open at his maximum the high circuit
electrovalve.
Make the settings during the hot water cycle.
SCREW IN
to INCREASE the temperature,
UNSCREW
to DECREASE the temperature.
Summary of Contents for AURA 2GR
Page 2: ......