La Marzocco STRADA EE Operating Manual - page 10
EN
10
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/).
3) 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.
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 9°f (90ppm, 5°d) and
less than 15°f (150ppm, 8.4°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.
4) Electrical connections
a) Power supply cord
• This is the main power supply cable that
provides power to the entire espresso
machine. There are different types of cable
based upon the electrical requirements of
the espresso machine purchased:
• 200/220VAC 1 Phase 3-core cable
with 4/6/10mm2 cross section or AWG
12/10/8 for 2,3 4 group versions, secured
to espresso machine via a strain relief
connector
• 220VAC 3 Phase 4-core cable with 4 mm2
cross section for 2 , 3 and 4 group versions,
secured to espresso machine via a strain
relief connector
• 380 VAC 3 Phase 5-core cable with
2.5mm2 cross section for 2, 3 and 4 group
versions, secured to espresso machine via
a strain relief connector.
b) Water pump motor power cord
WARNING
HAZARDOUS VOLTAGE DISCONNECT FROM
POWER SUPPLY BEFORE SERVICING.
WARNING
WATER PRESSURE SUPPLY MUST BE
BETWEEN 4 AND 8 BAR
IF SUFFICIENT PRESSURE IS NOT AVAILABLE
WE SUGGEST THAT AN ADDITIONAL WATER
SUPPLY SYSTEM IS USED
CAUTION
BEFORE MAKING ANY ELECTRICAL
CONNECTIONS MAKE SURE THAT THE TWO
STRAIN RELIEF CONNECTORS ARE FIRMLY
SECURED TO THE BODY OF THE MACHINE IN
ORDER TO PREVENT INADVERTENT STRESS
ON THE POWER CABLES.
WARNING
THE MOTOR PUMP MUST BE SITUATED
CLOSE TO THE MACHINE IN AN ACCESSIBLE
PLACE FOR MAINTENANCE BUT NOT FOR
ACCIDENTAL INTERFERENCE AND WHERE
THERE IS AN OPTIMAL AIR CIRCULATION.