La Marzocco MICRA, Manual

Page: 8 / 55

EN
10
that you can measure are Total Hardness,
Total Iron, Free Chlorine, Total Chlorine,
pH & Total Alkalinity, Chlorides.
Ideally, you should perform a test on the
water BEFORE the water treatment system
and again AFTER the water system in order
to verify if this is actually matching our
suggested ranges.
Once the test has been performed,
learn which treatment system is most
appropriate for your particular water supply
by filling out the online water calculator
on our website: LA MARZOCCO WATER
CALCULATOR
(http://www.lamarzocco.
com/water_calculator/).
2) Connect espresso machine to power supply.
Connect the espresso machine to a power
supply that is rated in accordance with the
serial plate on the espresso machine.
3) Filling the boilers with water.
Complete the following steps to properly
fill the boiler tanks:
Steam boiler:
Turn the main switch to
position “1”, the steam boiler will then
automatically fill to a predetermined
level. When the correct water level in the
steam boiler is reached, the machine will
automatically stop filling.
NOTE: It may be necessary to re-fill the water
reservoir during this process.
Coffee boiler:
The water flows inside the
Coffee group directly when the water
pump is activated. When the micra is
turned on the electronics will activate the
water pump to fill both boiler.
When the machine is first started, the user
must activate the paddle and leave it in
the dispensing position, for at least 30-40
seconds, in order to completely saturate
the boiler.
The machine heats up only after the coffee
boiler is fully saturated and the steam
boiler has reached the correct level.
4) Verify filling of boilers.
The installation is now complete and the
espresso machine should be heating to the
operating temperatures.
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 portafilter by inserting it into
the group head and rotate the handle from
left to right. Once the portafilter is inserted
properly, you can move the paddle on the
left side to start the flow of water through
the portafilter. Brew water through the
group for at least two minutes.
• Being careful to avoid burns, turn on
steam wand for at least 30 seconds.
• Turn on the hot water valve for the time
necessary to allow at least 0,5 liter of
water to be brewed.
5) Waiting for the espresso machine to heat to
operating temperature.
During this time, the pointer of the Coffee
group pressure gauge may reach as high as
12 bar. This may happen anytime that the
heating element is in the “on” condition.
In normal operating conditions, the Coffee
group pressure gauge can read anywhere
from 0-12 bar. When brewing, the pressure
should be set to approximately 9 bar.
The machine is ready to brew water when
the power indicator light (red) is ON.
When the machine is warming up the
power indicator light (red) is flashing.
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