Control Instruments; Starting Up; Use; Preparing Coffee - Rancilio CLASSE 10 USB S Original Instructions Manual

7.6 Foamed milk
Press the button to excite the steam and emulsion
delivery electromagnetic valves until the program-
med temperature and froth level are reached or
until the function is switched off.
7.7 Steamed milk
Pressing the key excites the steam distribution
electro-valves until the programmed temperature
is reached or until the same is pressed again.
Safety Devices
Dispensing cannot be carried out if the machine has
not reached the operating pressure or temperature
at least once, and each time that the boiler pressure
drops too much.
8 Steam supply handwheel "C-LEVER":
Rotating the turn-knob upwards will open the tap;
the turn-knob will remain in open position to allow
for a continuous steam supply. To close the tap,
turn the turn-knob back into its horizontal position.
Rotating the turn-knob downwards provides for
instant steam supply. Once it is released, the turn-
knob will go back into its horizontal position and the
steam supply is instantly stopped.
9 Supplementary manual water filling tap posi-
tioned under the discharge basin.
Press down to fill the boiler.
10 Valved gas power tap (models with gas heating).
Open: vertical position;
Closed: turn 90° in clockwise direction.
11 Piezoelectric button (models with gas heating).
Firing button: press down firmly to give off the spark
to light the gas for the burner.
7.2. Control instruments (Fig.8)
12 Gauge with mobile needle on a fixed dial with a
double scale.
Visual control of the pump (manometer on the left-
hand side) and of the boiler pressure (manometer
on the right-hand side)
13 Minimum and maximum water level indicator .
Visual control of water level in boiler.
14 Control window (models with gas heating).
Visual control of lighting and functioning of the
flame of the gas burner.

7.3. Starting up

 Turn on the water supply tap 2 Fig.6.
 Turn the main switch 1; the pump is activated, filling
the boiler.
 When the water reaches the correct level, the pump
stops.
Turn the main switch 2 to begin heating the water
in the boiler then turn each one until water begins
to flow from them.
 Wait for the machine to reach its working pressure
and to reach the correct thermal balance.
Models with gas (Fig.8)
 Turn on the water supply tap 2 (Fig.6).
 Turn on the gas tap 3 (Fig.6).
 Turn the main switch 1; the pump is activated, filling
the boiler.
 When the correct level is reached, the pump stops.
Turn the switch 2.
 Turn the gas tap 10 to the vertical open position
and hold down the incorporated button, at the same
time repeatedly press hard on the piezelectric but-
ton 11 until the spark lights the gas flame (carry out
this operation looking through window 14). Hold
the tap button 10 down for approx. 30 seconds to
allow the safety system to keep the flame lighted.
If the flame goes out, repeat the operation.
Should the flame not light up, avoid insisting
and close the gas tap by turning it 90° in a
clockwise direction.
 Wait until the machine reaches its working pressure
and until the correct thermal balance is achieved.

8. USE

WATER CHANGES: at the start of each daily activity
and anyway always after machine stop periods
longer than 8 hours, it is necessary to change
100% of the water contained in the circuits via the
points appropriately provided on the machine for the
purpose.
USING THE STEAM WAND: Before using the steam
wand, it is always necessary to flush out all the resi-
dual steam condensate for at least 2 minutes.
The machine has a top shelf on which the cups are
kept and heated, ready for use.
This is very important to obtain good coffee as the
pre-warmed cup stops the coffee from growing cold
too quickly.

8.1. Preparing coffee

 Unclamp the filter-holder from the dispensing unit
and knock any grouts out into the drawer especially
provided for this purpose, taking care not to dama-
ge the rim of the filter.
 Use the filter for 1 or 2 coffees, according to need.
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