La Marzocco Linea PB, Руководство по эксплуатации

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EN
9
4. Machine Operation and Coffee Preparation
1) Starting the espresso machine
a) Filling the boilers with water
Once the installation procedures have
been completed, it is necessary to fill the
boiler tanks with water. Complete the
following procedure to properly fill the
boiler tanks:
• Coffee boiler
The water flows inside the coffee
boiler directly, as soon as the water
system and water filter/softener taps (if
present) are opened. Since the inflow
of water will compress the air in the
boiler it will be necessary to remove or
“bleed” the air from the coffee boiler.
All air must be removed in order to
completely “saturate” the coffee boiler/
group assemblies. To remove the air
from the boiler, “bleed the groups”, it
will be necessary to remove the group
cover from the top of the machine. First
remove the group tray from the top of the
machine exposing the cup tray. Remove
the screws securing the group cover and
then remove it. Once removed the top
of the groups will be exposed.
Loosen the bleed screws one at a time
(see fig.4) to allow air to escape until
water flows from below the screw head.
Tighten the screw to stop the water
from flowing. Over tightening can cause
damage to the sealing washer and the
group cover. Repeat this procedure for
all groups. Once all air is removed from
the coffee boiler, reinstall the group cover
by following the removal instructions in
reverse.
• Steam boiler
Turn the main switch (item 1 in Fig. 1) to
position “1” or ON, the automatic steam
boiler level gauge will be switched on,
activating the auto-fill solenoid valve and
the motor pump. This will fill the steam
boiler to a predetermined level and will
shut off when full.
Note: It may happen that the air inside
the steam boiler builds up pressure
(which may be detected through the
pressure gauge - item 2, fig. 1) when the
water is allowed to flow in; this “false”
pressure must be eliminated by opening
the steam valves (item 8, Fig. 1).
b) Turning the espresso machine on
Once you have completed these
procedures, check the display. Press
enter to confirm that the preceding
procedures are complete.
The installation is now complete and the
espresso machine should be heating to
the operating temperatures.
2) Waiting for the espresso machine to
heat to operating temperature
During this time, it may happen that the
pointer of the coffee boiler pressure gauge
reaches as high as 14-15 bar. This may
happen anytime that the heating element
is in the on condition. In this case it is
necessary to adjust the expansion valve
(Fig. 3) in such a way that the pressure
may never exceed 11-12 bar. In normal
operating conditions, the coffee boiler
pressure gauge can read anywhere from
0-12 bar.
Fig.4