Starting The Machine For The First Time; Pressure Switch (Geniale "M" Version Only); Preparing Coffee - La Pavoni DESIDERIO V Manuel D'utilisation

5. STARTING THE MACHINE FOR THE FIRST
TIME
Once the hydraulic and electrical connections
have been completed, the machine can be started
up.
Open the water tap (A).
Turn off the circuit breaker (D).
Press the power on button (1); the power on light
will come on.
The automatic water level device will start filling
the boiler with water until it automatically reaches
an intermediate position between MIN and MAX
on the level indicator (23).
Once the automatic water filling procedure is
complete, press the maximum power button (3) to
switch on the heating element to heat the water
(Geniale "M" version only).
Wait for the machine to reach the operating
pressure of 1.1 ÷ 1.3 bar, checking the pressure of
the boiler on the pressure gauge (7).
If the machine does not stabilise at the values
indicated, you should adjust the pressure switch
as indicated in paragraph 6.1.
Check the pressure on the pump pressure gauge
(12) by operating a group head with the filter
holder inserted and full of properly ground,
dosed and pressed coffee, to obtain an effective
operating pressure of 8/9 bar.
If you need to adjust the pump pressure, follow
the instructions in paragraph 6.2.
The machine is now ready for use.
The automatic water level device will start filling
the boiler with water until it reaches the pre-set
level; the level of water in the boiler is checked
automatically and will be topped up automatically
to the required level.
Regularly check the amount of water in the boiler,
which should not fall below the MIN level of the
indicator (23); if necessary, top up the level by
pressing the boiler water filling button (9).
If there is no water in the boiler when
the machine is in operation, the heating
element will fail. This must be replaced by
an authorised service centre.
During start-up:
when the boiler pressure gauge (7) indicates
approximately 0.5 bar, slowly open the steam
knoblever (14-20) to discharge any air that may be
contained in the boiler. Wait until steam starts to
come out of the steam wand (11) before closing
it. Wait until the machine reaches the operating
pressure and the correct thermal balance, after
35-45 minutes.
Do not press the hot water dispensing
button or turn the tap before the correct
operating pressure of 1.1 bar has been
reached, indicated on the boiler pressure
gauge (7).
5–1. PRESSURE SWITCH (Geniale "M" version
only)
The function of the pressure switch shown in
the figure is to keep the pressure in the boiler
constant by activating or deactivating the electric
heating element.
The pressure switch is adjusted to 1.1 ÷ 1.3 bar
when the machine is tested.

6. PREPARING COFFEE

To obtain a good cup of espresso coffee, it is
important that you use good quality, well roasted
and correctly ground coffee. Grinding is optimal
when it takes 15-18 seconds for one cup and 30-
35 seconds for two cups to be delivered. Coffee
should be ground just before it is used. Once
ground, coffee loses its flavour very quickly. If the
coffee is too coarsely ground, the coffee will be
light coloured and weak without froth and if the
coffee is too finely ground the espresso will be
dark and strong with little froth. Warm cups help
maintain the coffee at the right temperature. We
therefore recommended that before using them,
you place the cups on the cup warmer shelf (19),
which will be warmed by the heat given off from
the boiler.
On machines fitted with an electric cup warmer,
cups are pre-heated by pressing the button (8);
the light inside the button will turn on to indicate
that the cup warmer is in operation. Press the
button (8) again to switch off the cup warmer.
Do not cover the cup-warming shelf with
fabrics, felt etc.
After placing the filter in the filter holder (22), fill
the filter with the amount of coffee required for
1 or 2 cups (7 g - 14 g), then level the coffee and
compact it using the tamper. Remove any coffee
residues from the edge of the filter using the palm
of your hand and insert the filter holder into the
group head (21), moving it towards the right to
secure it.
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