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5.3 PUMP - PRESSURE ADJUSTMENT
In infusion, the pressure must be between 9 and 10 bar (pressure gauge - green scale)
RUMBA 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 RUMBA and TRI RUMBA Model
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.
5.4 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.
FLUSHING INSTRUCTIONS
The unit is to be flushed prior to putting it into service, or after 24 hours of inactivity.
Dispense to the drain : - through each coffee head and water nozzle 0,5 litre of water
- through each steam nozzle some steam for 1 minute
"BEFORE PREPARING ANY BEVERAGE"
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