La Marzocco linea Manual De Instrucciones página 12

2) STEAM BOILER
By turning the main switch (part 1) to
position "1", the automatic fill system
will be switched on which, by activating
the solenoid valve and the motor pump
(part 15), will fill the steam boiler up to a
predetermined level selected by adjusting
the probe inside the boiler itself.
N.B.
It may happen that the air inside the boiler
builds up pressure (which may be detected
through the pressure gauge - part 3, Fig 1,
2 or 3) To resolve this, turn the machine
off and bleed the air from the groups (see
previous page for instructions). Once you
have completed these operations, turn
the main switch (part 1) to position "2"
and wait for the boilers to reach operating
temperature and pressure (which takes
from 20 to 35 minutes, depending on
the size of machine), which will be
subsequently maintained at a constant
value automatically.
During this time, the pointer of the lower
scale on the pressure gauge (part 3, fig.
1 or 3; or part 4 fig. 2) may reach as
high as 11-12 bar; this may occur any
time that, while activating the groups,
the motor pump forces cold water into
the coffee boiler at a pressure of 8-9
bar and, simultaneously, the temperature
controller regulating the temperature of
11
the boiler itself switches on the heating
elements in order to bring the water
contained in such boiler up to operating
temperature. However, in this case it is
necessary to adjust the expansion valve
(Fig. 4, part 19A) in such a way that the
pressure may never exceed 12 bar.
Brewing after first installation
Once the first installation procedures are
finished, before proceeding with brewing
coffee, hot water and steam, please follow
these steps:
- Engage the portafilters by inserting
them into each group, brew water through
each group for at least two minutes.
- Being careful to avoid burns, turn on
each steam wand for at least one minute.
- Turn on the hot water valve for the
time necessary to allow the following
quantities of water to be brewed:
At least 1 liter for a 1/2 group machine
At least 2 liters for a 3 group machine
At least 3 liters for a 4 group machine
COFFEE BREWING BuTTON (fig.1 part 5)
CAUTION
DO NOT REMOVE THE FILTER HOLDER WHILE
RELATIVE GROUP IS BREWING HOT LIqUIDS.
THE COFFEE BOILER CONTAINS WATER AT
ELEVATED TEMPERATURE. WATER
TEMPERATURE OVER 125°F / 52°C CAN CAUSE
SEVERE BURNS INSTANTLY OR DEATH FROM
SCALDING.
For EE model - fig. 1
Take a portafilter and place some ground
coffee in the filter itself: the suggested
amounts (in grams) to use are laser-
marked on the actual filters. Press
down on the ground coffee with the
supplied tamper and engage the filter
holder in the group and then press the
switch (part 5) thus allowing coffee to
be brewed; when you have obtained
your desired amount of coffee, press
the switch again (part 5), at which point
the machine discharges the pressure built
up in the filter holder. The holder may
then be removed to proceed with making
another coffee, as required.
For PADDLE model - fig. 2
Take a portafilter and place some ground
coffee in the filter itself: the suggested
amounts (in grams) to use are laser-
marked on the actual filters. Press down
on the ground coffee with the supplied
tamper and engage the portafilter in the
group. Move the paddle handle of the