La Marzocco strada ep Operating Manual - page 15
EN
15
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, or
“bleed the groups”, it will be necessary
to remove the plastic cap and the handle
from the top of the group.
Loosen the bleed screws one at a time
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 on all groups.
• Steam boiler
Turn the main switch to position “1”
or ON, then push the encoder knob for
three seconds and the automatic steam
boiler level function 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: Air inside the steam boiler may
build up pressure (which may be detected
through the pressure gauge).
Once the pump stops, check the display,
the message “Coffee Boiler Filled?”
should be displayed. Push the Encoder
Knob to confirm that the preceding
procedures are complete.
The installation is now complete and the
espresso machine should be heating to
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
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 three
coffee boiler expasion valves) in such
a way that the pressure never exceeds
13.5bar.
4. Machine Operation and Coffee Preparation