9
TWIN, TRI and QUATTRO MIRA Models
The HP valve is located in the lower part at the left rear of
the machine: it is necessary to dismantle the left side.
The valve must open at about 13 bar (green scale of the
pressure gauge).
- If the valve opens ABOVE 13 bar LOOSEN
- If the valve opens BELOW 13 bar TIGHTEN
Use a pin-wrench; after the adjustment, do not forget to
block the counter nut.
Pump-pressure adjustment
In infusion, the pressure must be between 9 and 10 bar (pressure gauge - green scale).
MIRA Model
The pump is located in the left side
and the adjustment must be done from
the same side of the machine.
TIGHTEN to INCREASE the pressure.
LOOSEN to DECREASE the pressure.
TWIN, TRI and QUATTRO MIRA Models
The pump is located in the right side
and the adjustment must be done from
the same side of the machine.
TIGHTEN to INCREASE the pressure.
LOOSEN to DECREASE the pressure.
Coffee grinding adjustment
- Wait until the machine has reached the proper temperature (0.9 to 1 bar).
- The fineness of the grinding determines the time it takes for hot water to pass through the
coffee.
- The passage-time is usually checked by using the 2-cup filter, with 2 doses of ground coffee.
- The average passage-time for 2 cups (6 to 7 cl. per cup) is from 30 to 35 seconds.
- If the passage-time is shorter, grind the coffee finer.
- If the passage-time is longer, grind the coffee coarser.
- For a good cup of coffee, use at least 6 gr. of ground coffee per cup.
8. PROGRAMING OF THE DIFFERENT COFFEE QUANTITIES IN
THE CUP
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