EN
14
• Three-phase, 380VAC - 50 Hz electrical
connection with n ground, near
the bench on which the machine is
installed and terminating in a suitable
protected fivepole socket equipped with
an approved interlock switch
• Waste water drain system.
3) Water test kit
In order to enable you to check if your water
supply is within the suggested ranges, La
Marzocco machines will be equipped with
two units of a quick water test kit (see image
below) including 6 test-strips and instruction
cards.
The parameters 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/).
4) Water supply connection
In order to connect the machine up to
the water mains proceed according to
the indications given in the chapter about
Installation and in compliance with any
local/national safety standards of the
location in which the machine is being
installed. The equipment is to be installed
with adequate backflow protection to comply
with applicable federal, state, and local
codes.
To guarantee a correct and safe functioning
of the machine and to maintain an adequate
performance level and a high quality of the
beverages being brewed it is important that
the incoming water be of a hardness greater
than 7°f (70ppm, 4°d) and less than 10°f
(100ppm, 6°d), pH should be between 6.5
and 8.5 and the quantity of chlorides be
less than 50mg/l . Respecting these values
allows the machine to operate at maximum
efficiency. If these parameters are not
present, a specific filtration device should
be installed, while always adhering to the
local national standards in place regarding
potable water.
Then connect the inlet of the water filter/
softener (if present) to the drinking water
supply using one of the supplied stainless
steel braided hoses. Before connecting the
filter to the water pump, flush the water
supply line and the filtration system in order
to eliminate any residual particles which
could otherwise get stuck in taps or valves
thus preventing them from working properly.
Connect the water supply connection of
the espresso machine to the water pump
outlet using one of the supplied stainless
steel braided hoses. Then connect the water
pump inlet to the water filter/softener outlet
(if present).
Note:
The water pump is a differential pressure
volumetric pump and has been designed to
be used exclusively with cold water. Make
sure that water is always present while the
pump is operating, otherwise air can be
introduced into the brew boiler causing an
undesireable condition and the pump can
be damaged.
5) Electrical connections
a) Power supply cord
• This is the main power supply cable
Summary of Contents for kb90 Series
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