La Marzocco leva 1 group, Руководство пользователя

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• Being careful to avoid burns, turn on
steam wand for at least one minute.
• Turn on the hot water valve for the time
necessary to allow at least 1 liter of
water to be brewed.
5) Waiting for the espresso machine to heat to
operating temperature.
During this time, it may happen that
the pointer of the coffee boiler pressure
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
(see the picture below about the coffee
boiler expasion valves) in such a way that
the pressure never exceeds 6 bar.
The steam boiler pressure can be read
through a pressure gauge located inside
the machine.
When the steam boiler reaches operating
temperature, the light on the Hot Water
dispense button will switch on.
NOTE: As the steam boiler reaches operating
temperature you may hear air and steam
escaping from the boiler. This is a normal sound.
As the water boils, air in the boiler is replaced by
steam and exits through the vacuum breaker. As
the boiler get closer to operating temperature
Figure 2 - Expansion Valve Adjustment
Decrease
pressure
Increase
pressure
the vacuum breaker closes and the steam is
no longer able to escape. This process allows
the air in the steam boiler to escape and to be
replaced by water vapor.
6) Machine CE plate:
7) Adjusting the expansion valve.
The expansion valve is a component
that limits the maximum pressure in the
coffee boiler. Heating the coffee boiler
causes the water within to expand. Since
the coffee boiler is completely saturated,
the expanding water causes an increase
in pressure within the boiler. Without a
safety device the increase in pressure
could cause a rupture in the boiler.
The pressure in the coffee boiler should
never exceed 6 bar. The valve is hot, so,
using adequate protection, rotate the
expansion valve clockwise to increase
pressure. To decrease pressure, rotate the
expansion valve counter clockwise (see the
following diagram).
LEVA X 1GR
LV000000 07/2019 50/60
2300 220-240 10