La Marzocco kb90 Series User manual

manual
kb90
The kb90 is tailored to suit the needs of the world’s busiest coffee bar, making
espresso preparation easier for baristas. La Marzocco, considering the needs of high
volume cafes and their staff, has redesigned the portalter system to reduce the
wrist strain of the user. By focusing on simplifying the ne motions, the machine is
able to shave seconds off of the time required to make each drink. The kb90 sets a
new standard in high volume cafe performance for La Marzocco.

EN
kb90
certications available:
Operating Manual V1.1 - 03/2019
MAN.22.1
La Marzocco S.r.l.
Via La Torre 14/H
Località La Torre
50038 Scarperia e San Piero
(Firenze) - ITALIA
www.lamarzocco.com
[email protected]
T: [phone]
F: [phone]
page 3
page 7
page 10
page 16
page 19
page 20
page 23
page 24
page 25
page 27
page 28
Chapters
1. General Warnings and Safety Specications
2. Denition of Available Models
3. Installation
4. Machine Operation and Coffee Preparation
5. Dispensing Steam and Hot Water
6. Maintenance and Periodic Cleaning Operations
7. De-commissioning and Demolition
8. Mandatory Maintenance and Check-up Operations
9. Precision Scale
10. Straight-in
11. Software Programming Guide

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1. General Warnings and Safety Specications
1) Important safeguards
• The weighted sound
pressure level of the
machine is lower than
70dBA.
• Use, cleaning and
maintenance of this coffee
machine are realized
by people (including
children more than 8
years of age) with reduced
physical, sensory or mental
capabilities, or lack of
experience and knowledge,
as long as they have
been given supervision or
instructions concerning
the use of the appliance
by a person responsible
for their safety and if they
understand dangers.
• Children should be
supervised to ensure that
they do not play with the
appliance.
• Keep the appliance and
its cord out of the reach of
children less than 8 years
of age.
2) This operating manual
is an integral and essential
part of the product and
WARNING
This machine is for professional
use only and should be installed
in locations where its use and
maintenance is restriced to
trained personnel. Children are
forbidden to operate or play with
the machine.
WARNING
The Coffee machine must be
placed in a horizontal position on
a counter higher than 80 cm from
the ground.
CAUTION
As already mentioned in
the preceding notes, the
manufacturer shall not be held
responsible for damage to
objects, animals and/or people
whenever the machine has not
been installed according to the
instructions contained in this
manual, and is not used to do
what it was designed for (i.e.
preparing coffee and hot drinks).
WARNING
This machine is not suitable
for outdoor use. Jets of water
should not be used to clean the
machine, nor should it be placed
where water jets are used.

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4
must be supplied to users.
Users are asked to read
the enclosed warnings and
cautions carefully, as they
provide valuable information
concerning safety during
installation, operation and
maintenance. This manual
must be kept in a safe
place and be available for
consultation to new and
experienced users alike.
3) Ensure product’s integrity
by inspecting the packaging,
making sure it presents no
signs of damage which might
have affected the enclosed
machine.
4) Check the machine’s
integrity after having carefully
removed the packaging.
Note: In case of doubt, do not go
on any further and contact your
dealer or retailer immediately. They
will send out specialized personnel
authorized to perform service on
the espresso machine.
5) Packaging (boxes, plastic
bags, foam parts and whatever
else) must not be left around
within easy reach of children,
due to the potential danger it
represents, nor be discarded
in the environment.
6) Check to see that data on
the rating plate corresponds
to those of the main electrical
supply which the machine will
be hooked up to.
7) The equipment must be
installed to comply with the
applicable federal, state or
local electrical and plumbing
codes. The installation
also must comply to the
manufacturer’s instructions,
and must be performed by
qualied and authorized
personnel.
8) Incorrect installation may
cause for injury/damages to
people, animals or objects, for
which the manufacturer shall
not be held responsible.
9) Safe electrical operation of
this device will be achieved
only when the connection to
the power outlet has been
completed correctly and
in observance of all local,
national, and international
electrical codes and safety
regulations, and particularly
by grounding the unit.
Make sure grounding has

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5
been done properly as it
represents a fundamental
safety requirement. Ensure
qualied personnel check
such connection.
10) Furthermore, you must
ensure that the capacity of
the available electrical system
is suitable for the maximum
power consumption indicated
on the espresso machine.
11) We do not recommend
using adapters, multiple
plugs and/or extension cords.
If you cannot avoid using
them, make sure that they are
exclusively of the kind which
conforms to local, national,
and international electrical
codes and safety regulations,
being careful not to exceed
the power and current ratings
indicated on such adapters
and extension cords.
12) This device must be used
exclusively for the functions it
has been designed and built
for. Any other application is
inappropriate and dangerous.
The manufacturer shall not be held
responsible for any damages caused
by improper and/or irrational use.
This machine should not be
installed in kitchens.
13) Using any electrical
device requires that certain
fundamental rules be
observed. In particular:
• do not touch the device
with wet or humid hands
and feet;
• do not use the device while
having no shoes on your
feet;
• do not use extension cords
in bath or shower rooms;
• do not unplug the device
from the power outlet by
pulling on the power supply
cable;
• do not expose the device to
atmospheric agents (rain,
sun, etc.);
• do not allow children or
untrained people to use
this device;
• do not clean the control
panel with a wet cloth since
it is not watertight.
14) Before carrying out any
maintenance and/or cleaning
operations, turn the main
switch, which is located on
the front left of the machine,
to the “0” or “OFF” position,
and disconnect the machine
from the electrical network

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6
by unplugging the cord or
by switching off the relative
circuit breaker. For any
cleaning operation, follow
exclusively the instructions
contained in this manual.
15) In case the machine is
operating in a faulty manner
or breaks down, disconnect
it from the electrical network
(as described in the preceding
point) and close the water
supply valve. Do not attempt
to repair it. Contact a qualied
and authorized professional to
perform any repair. Any repairs
must be performed exclusively
by the manufacturer or by
an authorized centre using
only original parts. Non
compliance with the above
could compromise the safe
operation of the machine.
16) You should plan to
make use of an omnipolar
connector during installation,
as required by local, national,
and international electrical
codes and regulations.
17) In order to avoid dangerous
overheating problems, it is
recommended that the power
supply cable be fully unfurled.
18) Do not obstruct air intake
and exhaust grilles and, in
particular, do not cover the
cup warmer tray with cloths or
other items.
19) The machine’s power
supply cable must not be
replaced by users. In case the
power supply cable becomes
damaged, shut off the
machine and disconnect the
machine from the electctrical
network by switching off the
relative circuit breaker and
close off the water supply;
to replace the power supply
cord, contact qualied
professionals exclusively.
A B
C
20) Common Dimensions, Weights,
and Features
WEIGHT [kg]
AB
C
kb90 2 groups
A [mm] 810
72
620
448
3 groups
1050
88
620
448
B [mm]
C [mm]

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2. Denition of Available Models
This operating manual refers exclusively to the following models, of our own manufacture:
kb90 model 2 and 3 groups
Fig. 1 - Model with 2 or 3 groups
1Main Switch
2Pressure Gauge
(Steam & Brew water)
3Brew Groups
4Control Panel
5Group #1 Keypad
6Digital Display
7Steam Wand
8Steam Knob
9Hot Water dispense nozzle
10 Removable Drain Tray
11 Hot Water Button
12 Cup Warmer Button
13 Hot Water Mix Valve
14 Straight-in
15 Precision Scale
For additional information on electronics,
keypads, and software programming, please
see the section entitled Software Programming
your Espresso Machine.
1
10
2
9
7
8 635
4
14
3 3
7
81112
13
15 1415 15
Legend

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1) General Description
The machine is built in 2 and 3 coffee
group versions and is essentially composed
of the following parts:
• Steam Boiler (produces steam and hot
water);
• Coffee (“saturated”) boiler;
• Brewing groups;
• Exterior Cover;
• Water pump.
2) Description of the various parts
• Steam Boiler
The Steam Boiler consists of a cylindrical
tank, of varying length according to the
number of coffee groups, which is made
of AISI 300 series stainless steel. Each
unit is subjected to a hydraulic test, at a
pressure of 6 bar, and has an operating
pressure of 1.3-1.5 bar. The following
is a list of effective volumes and power
ratings according to the number of groups
installed:
2 groups 7,0 liters 3000 Watts
3 groups 11 liters 4000 Watts
Covers are welded at either end of the
cylindrical tank and on one of them there
is a housing for the water heating element,
which allows the steam boiler to reach
operating pressure within approximately 25
minutes. Operating pressure is maintained
by temperature probe and PID controller.
The steam boiler has various ttings used
for safety devices, for supplying hot water
and steam, and for the heating element.
Composed of AISI 300 series stainless
steel tube. Heating is accomplished
through an immersion-type plated heating
element.
• Operating pressure of 1.3-1.5 bar,
controlled automatically through a
pressure switch or a temperature
probe, adjusted to open the heating
element supply circuit at 1.5 bar and
close it at 1.3 bar.
• The pressure is displayed by means of
a pressure gauge with a scale of 0 to 2
bar.
• Safety device, based on an expansion
type mechanical valve, with counter-
acting spring adjusted to 1.8 bar.
• Testing: hydraulic test at 4.5 bar
performed on ready-to-use small
boilers, at our factory.
• Coffee Boiler
The Coffee Boiler consists of a cylindrical
tank made of AISI 300 series stainless
steel. One each group (hot water generator
for brewing coffee).
Each unit is subject to a hydraulic test,
at a pressure of 18 bar, and has an
operating pressure of 9 bar. The following
is a list of effective volume and power
ratings according to the number of groups
installed:
2 groups 2 x 1,3 liters 2 x 800 Watts
3 groups 3 x 1,3 liters 3 x 800 Watts
Covers are installed at either end of the
cylindrical tank and on one of them there
is housing for the water heating elements.
The temperature of the coffee boiler is
maintained by an electronic temperature
controller (PID capable) with an accuracy
of 0.2°C. The brewing groups are installed
on the boiler.
Composed of an AISI 300 series stainless
steel tube. Heating is accomplished
through an immersion-type plated heating
element.
• Operating temperature 95°C
(adjustable), controlled automatically
by an electronic temperature controller
with an accuracy of 0.2 °C. Operating
pressure of 9 bar.
• Pressure is displayed through a pressure
gauge with a scale from 0 to 18 bar.
• Safety device, based on an expansion
type mechanical valve, with
ounteracting spring adjusted to 13 bar.
• Testing: Hydraulic test at 18 bar
performed on ready-to-use small boilers,
at our factory.

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9
• Brewing groups
They consist of a precision casting made
of stainless steel. The brewing group
accepts the portalter used to hold the
ground coffee; the espresso ows through
the brewing group, through the portalter
basket, through the portalter spout, and
into the cup(s) after the brewing button
has been pressed.
• Exterior cover
The exterior consists of painted and
stainless sheet steel panels. To provide
good aesthetics, to optimize ergonometrics
for the operator and to reduce the chance
of damage to a minimum.
• Water pump
The rotary vane pump, is installed on the
water supply tubing and is set up to operate
anytime the coffee groups are activated,
and through an autoll system whenever
the water boiler needs to be replenished.
• Machine CE plate:
• Machine ETL plate:
KB90 3AV KB000000 01/18
220-240 7783 33.8 50/60
0.9
1.3x3 11.8
KB90 3AV
161
KB000000
01/18 29-33

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10
3. Installation
Fig. 2 - Installation Guide Fig. 3 - Installation Nomenclature
DRAIN HOSE CONNECTION
EXPANSION VALVE
DRAIN GRATE
DRAIN TRAY
THE DETAILS ON THE LEFT DESCRIBE
HOW TO CONNECT EACH WIRE TO THE PLUG.
RESPECT ALSO THE LOCAL SAFETY
REGULATIONS.
MODEL/SERIES GROUP V/Hz
RATED
POWER
(W)
RATED
INPUT
(A)
COFFEE
BOILER
WATTAGE
STEAM
BOILER
WATTAGE
TOTAL
WATTAGE
POWER CORD
SIZE (mm²)
KB90
2GR
A
C220-240V/60H
z
AC208-240/60H
5666
5360
24.6 1600
1600
3000
3000
5666
5360 SEE ELECTRICAL
3GR
7783
7324
2400
2400
4000
4000
7783
7324
CONNECTIONS
FOR DETAILS
WARNING
AC220-240V/60Hz
AC208-240/60Hz
21-24
33.8
29-33
POWER CORD:
1 X BLUE (NEUTRAL)
1 X BROWN (PHASE)
1 X YELLOW & GREEN (GROUND)
5 X WIRES
380V
1 X BROWN (PHASE)
1 X GRAY (PHASE)
1 X BLACK (PHASE)
1 X BLUE (NEUTRAL)
1 X YELLOW & GREEN (GROUND)
3 X WIRES
220V
WARNING
The machine is intended to be
permanently connected to xed
wiring, and it is mandatory that
a residual current device (RCD)
with a rated residual operating
current not exceeding 30mA is
installed.

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11
WARNING
At each installation, the
machine should be equipped
with a new set of tubes for
plumbing and related gaskets.
WARNING
Water pressure supply must
be between 0,2 and 0,6 MPa if
sufcient pressure is not available
we suggest that an additional water
supply system is used.
WARNING
Hazardous voltage disconnect
from power supply before
servicing.
WARNING
Before making any electrical
connections make sure that the
two strain relief connectors are
rmly 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.
WARNING
The manufacturer declines any
responsibility for any event
leading to liability suits whenever
grounding has not been
completed according to current
local, national, and international
regulations and electrical codes,
or other electrical parts have
been connected improperly.
WARNING
- U.S.A. and CANDA only - Do not
connect to a circuit operating
at more than 150V to ground on
each leg.
WARNING
This appliance is not intended
for use by persons (including
children) with reduced physical,
sensory or mental capabilities,
or with lack of experience and
knowledge, unless they have
been given supervision or
instruction concerning the use
of the appliance by a person
responsible for their safety.
WARNING
This machine should not be
installed in kitchens.
WARNING
This machine is not suitable for
outdoor use. Jets of water should
not be used to clean the machine,
nor should it be placed where
water jets are used.

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12
WARNING
The Coffee Boiler and Steam
Boiler contain water at
elevated temperature. Water
temperature over 125°F /
52°C can cause severe burns
instantly or death from scalding
(Coffee Boiler 207°F/97°C -
Steam Boiler 256°F / 124°C)
WARNING
Replace fuses with the same
size, type and rating F1 = 2A,
250V
Note:
• The drinking water mains valve and
the circuit breakers for the electrical
system need to be located in the most
convenient position for the operator to
access them easily and quickly.
• The machine should be placed on a at
counter and must be placed in settings
with the following temperatures:
Minimum room temperature: 5°C/41°F;
Maximum room temperature:
32°C/89°F.
• If the machine has been temporarily
housed in settings with a room
temperature of less 0°C/32°F, the
machine must be placed in a warmer
environment in order to gradually
defrost the hydraulic system prior to
use.
• Water pressure supply must be between
0,2 and 0,6 MPa.
• This machine complies with the
standard 61000-3-11, the impedance
at the supply interface must be Zmax=
0.03 Ω.
WARNING
In order to prevent cracks
or leakage: do not store or
install the Coffee machine
in places where in boiler or
hydraulicsystem to freeze.
Water specications table
Min. Max.
T.D.S. ppm 90 150
Total Hardness ppm 70 100
Total Iron (Fe+2/Fe+3)ppm 0 0,02
Free Chlorine (Cl2)ppm 0 0,05
Total Chlorine (Cl2)ppm 0 0,1
pH value 6,5 8,5
Alkalinity ppm 40 80
Chloride (Cl–)ppm not more 50
N.B.: Test water quality (the warranty is void if water parameters are not within the range
specied in the section “installation”)

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13
HERE THE POSITION WHERE WE
SUGGEST TO MAKE THE HOLE
ON THE TABLE
55 mm
2,2 in.
POSITION OF THE HIGH LEGS MACHINE
565mm (2 groups)
22,2 in. (2 groups)
805 mm (3 groups)
31,7 in. (3 groups)
78 mm
3 in.
412 mm
16,2 in.
160 mm
6,3 in.
217 mm
8,5 in.
135 mm
5,3 in.
400 mm
15,7 in.
250 mm
9,8 in.
123 mm
4,8 in.
318 mm
12,5 in.
HERE THE POSITION
OF THE DRAIN TUBE
FROM ∅100 TO ∅120 mm
FROM ∅4 in. TO ∅4,7 in.
HERE THE POSITION OF THE POWER CORD AND
WATER INLET HOSES
2) Accessories
Check the package to make sure that the
following accessories are included:
• a number of 1-dose and 2-dose portalters
orresponding to the number of groups;
• replacement 1-dose and 2-dose lters
(one of each);
• 1 tamper;
• 1 blind lter;
• cleaning detergent, for the groups;
• 3 stainless steel braided hoses for water
connections;
• 1,5 mt of reinforced plastic tubing for
drainage;
• 1 h o s e c l a m p .
In order to proceed with installation, it is
necessary that the following are available:
• Pipes carrying drinking water with a
3/8”G (BSP) end connection; (3/8”
Compression for USA and Canada)
• Electrical Supply according to the
specication of the espresso machine
purchased:
• Single/Three phase 220VAC - 50/60
Hz electrical connection with ground,
protected socket and approved interlock
switch
• Single phase 200VAC - 50/60 Hz
electrical connection with ground,
protected socket and approved interlock
switch
1) Installation on the counter
The image below shows the recommended method to drill the hole on the counter.
Fig. 4 - Hole on the Counter

EN
14
• Three-phase, 380VAC - 50 Hz electrical
connection with neutral + ground, near
the bench on which the machine is
installed and terminating in a suitable
protected vepole 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 lling 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 backow 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
efciency. If these parameters are not
present, a specic ltration device should
be installed, while always adhering to the
local national standards in place regarding
potable water.
Then connect the inlet of the water lter/
softener (if present) to the drinking water
supply using one of the supplied stainless
steel braided hoses. Before connecting the
lter to the water pump, ush the water
supply line and the ltration 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 lter/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

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15
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
This is the power supply for the water pump
motor. The internal electronics will switch
the pump motor on when needed.
• 3-core cable with 1.5 mm2 cross section
or 3-core AWG 16 (for UL version) secured
to espresso machine via a strain relief
connector.
c) Quick connection between the water pump and
the espresso coffee machine
The electrical connection must be made
through the use of the connectors, as
shown in the following gures:
- View of the connectors;
- Cable connection;
- Cable tightening;
6) Waste water drain connection
The espresso machine drain is to be
connected by means of the included
reinforced plastic tubing. Connect one end
of the reinforced plastic tubing to the drain
hose connection on the left side of the
espresso machine, secure with included
hose clamp. Connect the other end to a
suitable waste water collection system.
In case such a system is not available,
drained liquids may be collected in a
suitable bucket and any necessary drain
pipe extensions shall be made using steel-
lined PVC tubing and suitable hose clamps.
THE MOTOR PUMP MUST BE SITUATED
CLOSE TO THE MACHINE IN AN ACCESSIBLE
PLACE FOR MAINTENACE BUT NOT FOR
ACCIDENTAL INTERFERENCE AND WHERE
THERE IS AN OPTIMAL AIR CIRCULATION

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16
4. Machine Operation and Coffee Preparation
1) Starting the espresso machine
a) Filling the boilers with water
Once the installation procedures have been
completed, it is necessary to ll the boiler
tanks with water. Complete the following
procedure to properly ll the boiler tanks:
• Coffee boiler
The water ows inside the coffee boiler
directly, as soon as the water system and
water lter/softener taps (if present) are
opened. Since the inow 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, “bleed the
groups”, it will be necessary to remove the
group cover from the top of the machine.
First remove the group tray from the top
of the machine exposing the cup tray.
Remove the screws securing the group
cover and then remove it. Once removed
the top of the groups will be exposed.
Loosen the bleed screws one at a time (see
g.5) to allow air to escape until water
ows from below the screw head.
Tighten the screw to stop the water from
owing. Over tightening can cause damage
to the sealing washer and the group cover.
Repeat this procedure for all groups. Once
all air is removed from the coffee boiler,
reinstall the group cover by following the
removal instructions in reverse.
• Steam boiler
Turn the main switch (item 1 in Fig. 1) to
position “1” or ON, the automatic steam
boiler level gauge will be switched on,
activating the auto-ll solenoid valve and
the motor pump. This will ll the steam
Fig. 5
CAUTION
Never remove the lter holder
when water is being delivered.
This operation can be extremely
dangerous since the high
pressure built-up inside the blind
lter would spray out hot and
slightly caustic water, which may
cause severe burns. The Coffee
Boiler contains water at elevated
temperature. Water temperature
over 125°F / 52°C can cause
severe burns instantly or death
from scalding.
IMPORTANT
To improve the avor of the espresso, the
temperature of the water in the coffee boiler
and therefore of the groups may eventually
be raised or lowered via the digital display
(please consult the Software Programming
Manual for detailed instructions).
WARNING
The machine must not be dipped
in, nor splashed with, water in
order to clean it. For cleaning
operations, please follow the
instructions listed below very
carefully.
WARNING
This machine is designed only for
preparing coffee and hot drinks.

EN
17
boiler to a predetermined level and will
shut off when full.
Note: It may happen that the air inside the
steam boiler builds up pressure (which
may be detected through the pressure
gauge - item 2, g. 1) when the water is
allowed to ow in; this “false” pressure
must be eliminated by opening the steam
valves (item 8, Fig. 1).
b) Turning the espresso machine on
Once you have completed these
procedures, check the display. Press enter
to conrm that the preceding procedures
are complete.
The installation is now complete and the
espresso machine should be heating to the
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 gauge
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
(Fig. 3) in such a way that the pressure
may never exceed 11-12 bar. In normal
operating conditions, the coffee boiler
pressure gauge can read anywhere from
0-12 bar.
When brewing, the pressure should be set
to 9 bar.
When the steam boiler reaches operating
temperature, the light on the Hot water
dispense button will light.
When the espresso machine is ready to
operate all lights on the keypads will light.
3) Brewing after rst installation
Once the rst installation procedures are
nished, before proceeding with brewing
coffee, hot water and steam, please follow
these steps:
- Engage the portalters 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
4) Installing the portalters
Install the portalter(s) by inserting them
into the group and lift the portalter knob
rotating it from top to bottom until the stop
position is reached. When the portalters
are inserted properly, you can press any
of brew buttons to start the ow of water
through the portalter. You should allow
hot water to pass through the empty
portalter(s) for a few seconds each time,
in order to pre-heat the portalter.
Note: It is important to leave the portalters
installed in the espresso machine when
not in use. The portalter must remain
heated for the brew process to function
correctly.
5) Water pump
Whenever you are brewing coffee, and you
can adjust the pump pressure by turning
the by-pass screw (below the plug located
on the side to which the pump power
supply is connected) clockwise to increase
and counter-clockwise to reduce pressure.
Adjust pressure only when at least one
group is brewing coffee.
Note: When the heating element in the
coffee boiler is energized, the water will
expand increasing the start-up pressure.
Once the maximum pressure is reached,
the expansion (safety) valve should start
working by discharging a few drops of
water, in order to prevent such pressure
from exceeding 11-12 bar.
In case the pressure exceeds 12 bar,
you must adjust the expansion valve by
unscrewing the cap slightly. If this is not
sufcient, remove the valve and clear away
any calcium deposits. This remedy is valid
also in case the valve remains open in the
drain position (i.e. the pressure cannot
increase to 8 bar approx.).

EN
18
Filter Basket
Porta Filter
O-ring Gasket
Double Spout
6) Brewing coffee
It is now possible to remove one of the
portalters to make an espresso beverage.
Place some ground coffee in the lter
itself: 1 dose (approximately 6-7 g) for the
small lter, 2 doses (2 approximately 12-
15 g) for the larger lter. Press down on
the ground coffee with the supplied tamper
and install the lter holder up again to
the bottom of the group and then press a
button to begin the brewing process.
Note: Some baristas believe it is important
to press the brewing button prior to
installing the portalter to allow the water
to ush any remaining coffee oils and
particles from the group. Some also ush
just after brewing coffee for the same
reason. Please experiment to nd the best
possible procedure for you.
7) Controlling the brew process using volumetric
programming
This espresso machine allows the
volumetric programming of each of the
rst two buttons on each group (numbered
left to right). Please consult the
Software Programming Manual for further
instructions.
8) General notes for coffee preparation
The portalters must remain heated since
they are at the lowest position of the
group itself, and they are partially isolated
due to the rubber gasket between them.
This can be accomplished by leaving the
portalters installed in the machine when
not in use. The portalters may also be
actively heated. This procedure may be
carried out by brewing some hot water
through the portalter then turning off the
water ow, before making coffee.
It is important to remember that coffee left
over in the lters must be removed only
when you need to prepare another cup,
and only at that time should you place a
new dose of ground coffee in the lter.
The size of the coffee granules is extremely
important in preparing a good cup of
coffee, other than the type of coffee mix
used, quite obviously. The ideal grinding
can be determined by making various
coffees using the amount of ground coffee
that you would normally use for each cup
(we recommend at least 6-7g). The best
grinding is that which allows coffee to ow
out from the lter holder spouts neither
too slowly (drop by drop) nor too quickly
(quick light brown ow). A general rule
is that a double dose should dispense
approximately 25cc or 2 uid oz. of
espresso in approximately 25 seconds.
9) Cup Warmer
Press Cup Warmer Button for enabled or
disabled the cup warmer. This function
work in two modes continuous or timed
(see the Software Programming Manual
for further instructions).
Cup Warmer Button
10) Steam Flush and Flush
If the Steam Flush function is enabled
in the menu, steam will be delivered by
the group with a delay of 2 seconds form
portalter removal.
If the Flush function is enabled in the
menu, hot water will be delivered by the
group with a delay of 2 seconds form
portalter removal.
If the Steam Flush and Flush functions are
both enabled in the menu, steam and then
hot water will be delivered by the group
with a delay of 2 seconds form portalter
removal.

EN
19
5. Dispensing Steam and Hot Water
1) Steaming milk or other liquids
In order to allow for any condensed water
in the wand to be released ALWAYS allow
some steam to be discharged by turning on
the valve before inserting the steam wand
into the pitcher of liquid to be heated.
Dip one of the 2 steam wands (part 7,
g. 1) which are connected to the steam
valve, into the liquid to be heated, turn the
steam knob (part 8, g. 1) gradually until
steam comes out at the end of the wand.
The steam will transfer heat to the liquid
raising its temperature up to boiling point.
Be careful not to allow liquid to overow in
order to avoid severe burns.
In order to prevent the heated liquid
from being sucked back into the steam
boiler it is recommended before using
the wand that you purge the steam valve
and steam wand by opening the valve for
a few seconds to allow steam to escape
to the atmosphere from the end of the
steam wand. Failure to do so can cause
the heated liquid to transfer from the
heated liquid container to the steam boiler
(via vacuum created from cooling parts).
This condition is undesireable and can
cause contamination in the steam boiler.
After use remember to purge the wand by
opening the steam valve for a few seconds,
and then clean the outside of the wand
itself with an appropriate cloth.
In order to prepare milk for making
cappuccino with the right amount of foam,
go through the following steps:
• After purging the steam wand place the
container half-full of milk underneath,
carefully open the steam valve and raise
the container so as to bring the wand end
to a point just below the surface of the
milk; at this point, move the container
up and down just enough to dip the
nozzle end in and out of the milk until
you get the right amount of foam, bring
the temperature of the milk almost up
to 149/158°F or 65/70°C. You can then
pour this milk into a cup containing warm
espresso and you will end up with a fresh
cup of cappuccino.
2) Preparing hot water and other hot drinks
You may dispense hot water by using the
xed nozzle (item 9 g 1). To dispense hot
water, press the hot water button on the
right most group.
This button commands the hot water
delivery.
The volume of water delivered may
be adjusted via the display (see the
Software Programming Manual for further
instructions). The temperature of the water
dispensed may be adjusted by adjusting
the mixing valve under the right side cover
of the espresso machine. (only on the
models of espresso machine equipped
with this accessory)
HOT WATER
HOT WATER MIX VALVE

EN
20
1) Cleaning groups and drain wells
- Put a tablespoon of detergent powder
for coffee machines into the blind lter,
supplied with the machine, and tighten it
onto the group you want to clean by using
a normal lter holder.
- Activate the automating rinsing
(backushing) routine (see the Software
Programming Manual for more detailed
instructions).
- Rinse the group using a normal lter, by
running hot water through it several times
6. Maintenance and Periodic Cleaning Operations
WARNING
The machine must be installed so
that qualied technical presonnel
can easily access it for eventual
maintenance.
WARNING
Jets of water should not be used
to clean the machine, nor should
it be placed where water jets are
used.
WARNING
This machine is for professional
use only and should be installed
in locations where its use and
maintenance is restriced to
trained personnel.
WARNING
The machine is intended to be
permanently connected to xed
wiring, and it is advisable that
a residual current device (RCD)
with a rated residual operating
current not exceeding 30mA is
installed.
WARNING
The machine must not be dipped
in, nor splashed with, water in
order to clean it. For cleaning
operations, please follow the
instructions listed below very
carefully.
WARNING
In order to prevent cracks or
leakage: do not store or install
the coffee machine in places
where temperature may cause
water in boiler or hydraulic
system to freeze. WARNING
Do not remove the lter 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.
WARNING
If the above-mentioned
instructions are not adhered
to the manufacturer cannot be
held responsible for damage to
persons or things.