La Marzocco Strada AV User manual

manual
strada av
The Strada AV is characterized by its underlying mechanical features
and design of the Strada. The initials “AV” refer to a feature whereby
brewing is activated by a three button keypad where the doses
are counted by a owmeter for each group. This model includes
proportional steam valves, both featuring anti-resuction valves.

strada av
Operating Manual V3.0 - 09/2020
MAN.16.1.03
EN
certications available:
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]
Original instructions veried by the
manufacturer.
Scan QR Code to view the complete
Software Programming Guide available on
the techcenter website.
Printed on recycled paper.
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
page 3
page 8
page 11
page 19
page 22
page 23
page 25
page 26
page 27
10. Software Programming Guide page 30

EN
3
• 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.

4
This operating manual
is an integral and essential
part of the product and
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.
Ensure product’s integrity
by inspecting the packaging,
making sure it presents no
signs of damage which might
have affected the enclosed
machine.
Check the machine’s
integrity after having carefully
removed the packaging.
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.
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.
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.
Incorrect installation may
cause for injury/damages to
people, animals or objects,
for which the manufacturer
shall not be held responsible.
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
been done properly as it

5
represents a fundamental
safety requirement. Ensure
qualied personnel check
such connection.
Furthermore, you must
ensure that the capacity of the
available electrical system is
suitable for the maximum
power consumption indicated
on the espresso machine.
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.
This device must be used
exclusively for the functions it
has been designed and built
for. Any other application is
inappropriate and dangerous.
This machine should not be
installed in kitchens.
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.
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
by unplugging the cord or
by switching off the relative

6
circuit breaker. For any
cleaning operation, follow
exclusively the instructions
contained in this manual.
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.
You should plan to
make use of an omnipolar
connector during installation,
as required by local, national,
and international electrical
codes and regulations.
In order to avoid dangerous
overheating problems, it
is recommended that the
power supply cable be fully
unfurled.
Do not obstruct air intake
and exhaust grilles and, in
particular, do not cover the
cup warmer tray with cloths
or other items.
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.
These instructions are also
available in an alternative
format on a website
http://techcenter.lamarzocco.
com.
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.
Check the package to
make sure that the following
accessories are included:
• a number of 1-dose

7
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 hose clamp;
• 1 TEE Fitting.
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 0,4 and
0,8 MPa.
The maximum inlet water
pressure shall be at least
1,0 MPa (Denmark, Norway,
Sweden).
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.
This machine is designed
only for preparing coffee and
hot drinks.
Any modication to the
equipment is prohibited;
the manufacturer cannot
be held liable for damage
to property, animals, and/
or persons if the equipment
undergoes technical
and aesthetic changes,
changes in performance
and characteristics, and in
general is tampered with in
one or more of its constituent
components.
BA
C

8
STRADA, model AV 3 groups
Main Switch
Pressure Gauge (steam boiler)
Pressure Gauge (coffee boiler)
Brew Groups
Cup Warmer Button
Water Water Button
Digital Display
Steam Wand
Steam Wand Lever
Hot Water Wand
Removable Drain Tray
Group #1 Programming Keypad
Hot Water Mix Valve
For additional information on electronics,
keypads, and software programming,
please see the section entitled Software
Programming your Espresso Machine.
1
2 3
444
5 67 88
9910
1112 13

9
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.
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 8,2 liters 3000 Watts
3 groups 11,8 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.
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.

10
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.
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.
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.

11

12

13
• 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.
• This machine complies with the
standard 61000-3-11, the impedance
at the supply interface must be Zmax=
0.05
The image below shows the recommended method to drill the hole on the counter.

14
For best results, STRADA needs a
minimum ow of water in input of 100 l/h
and a pressure of 2.5 bar.
Installations that do not meet these
requirements will cause a shorter life of
the pump and may cause a high noise
level during coffee brewing.
If the pressure and ow are not adequate,
air bubbles may develop within the gears.
This is called cavitation. Cavitation can
impair the performance of the espresso
machine.
If the incoming water of the espresso
machine falls outside the recommended
parameters, it is necessary to carry out one
of the following installations:
Installation with the rotary pump
immediately after the water treatment
system, upstream of the tee.

15
Installation of the pressure reducer
immediately after the water treatment
system, upstream of the rotary pump.
Installation of the rotary pump (set to 9
bar) immediately after the pressure reducer,
upstream of the tee.

16
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
• 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.
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/).
Before switch on, remove the clamp from
the owmeter located inside the machine, as
indicated by the adhesive label applied on
the main switch. Also remove the label from
the main switch.
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.

17
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
30mg/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).
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.
• 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.
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.
The electrical connection must be made
through the use of the connectors, as
shown in the following gures:
- View of the connectors;
- Cable connection;
Machine connector Pump connector

18
- Cable tightening;
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.
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 30
Test water quality (the warranty is void if water parameters are not within the range
specied in the section “installation”)

19
The water ows inside the coffee boiler
directly, as soon as the water system and
purier 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
boilers. 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 keypad from the top of the
group.
Loosen the bleed screws one at a time
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 on all groups.
Turn the main switch 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 boiler to a predetermined
level and will shut off when full.
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).

20
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. Press to
conrm that the preceding procedures are
complete.
The installation is now complete and the
espresso machine should be heating to
operating temperatures.
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
bar.
In normal operating conditions, the coffee
boiler pressure transducer, while brewing,
can read anywhere from 0-12 bar when
brewing.
When the steam boiler reaches operating
temperature, the light on the Hot Water
dispense button will switch on.
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
Install the portalter(s) by inserting them
into the group and rotate the handle from
left to right. 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 preheat the portalter.
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.
Display
Expansion
Valve
Filter Basket
Porta Filter
O-ring Gasket
Double Spout