Wega WBAR EVD User manual

EN ESPRESSO COFFEE MACHINE
Use and Maintenance Manual. TECHNICIANS' instructions.
WBAR
EVD

All rights reserved on contents The total or partial reproduction and the dissemination of this document’s contents is forbid-
den without the Manufacturer’s prior written authorisation. The Company logo is owned by the Manufacturer of the Machine.
IMPORTANT: Read carefully before use. Store for future reference.

TECHNICIANS' manual
- English - 3 di 52
I. SAFETY PRECAUTIONS
I.I. LEVEL OF TRAINING AND KNOWL-
EDGE REQUIRED OF THE TECHNI-
CIAN
The Technician is a specialised person that has
been specially trained and authorised to carry
out the following operations in accordance
with current regulations: transport and han-
dling, storage, installation, commissioning,
maintenance, decommissioning, dismantling
and disposal of the machine.
The Technician must be properly trained and
informed regarding any residual risks present
during these operations and while the machine
is operating.
The Technician must be able to apply all the
good practices in compliance with food hygiene
principles.
Any unauthorised tampering with any
parts of the machine renders the guar-
antee null and void and relieves the manufac-
turer of any liability should the machine mal-
function or any user accidents occur.
I.II. SAFETY PRECAUTIONS
Even though the machine is provided with all
safety devices required to eliminate possible
risks for the Technician, there are still certain
residual risks.
These so-called residual risks are related to
machine parts that may pose a risk to the
Technician, if used improperly, evaluated or de-
activated incorrectly, because the prescriptions
contained in this Manual were circumvented.
The machine is also equipped with appropriate
warnings placed on residual risk areas, which
must be scrupulously observed.
Attention must be paid to the residual risks
that are present during the operations de-
scribed in the following paragraphs as they
cannot be eliminated:
Compliance with the installation and ma-
chine’s safety standards is dependent on the
use, installation, maintenance and correct op-
eration of the machine. These factors are the
responsibility of the purchaser, Technician and
Technician’s employer.
The Technician’s employer is responsible for
hiring and training personnel to correctly in-
stall, run and perform maintenance work on
the machine and its protection systems.
I.III. TRANSPORT AND HANDLING
Hand crushing hazard
Handling operations must always and exclu-
sively be performed by the Technician and in
compliance with the current health and safety
regulations.
Before starting the transport and/or handling
manoeuvres, check the route, dimensions
needed, safety distances, places suitable for
placing the load down, and the appropriate
equipment for the operation.
Handling operations must be carried out by at
least 2 people, or with the help of special lifting
equipment.
In view of the substantial weight of the equip-
ment, exercise great caution during the han-
dling operations.
The Manufacturer is not responsible for any
injury or damage caused by clothing, lifting
equipment and personal equipment which was
not suitable for the type of intervention that
the operator had to carry out.
The packaging material must not be left with-
in the reach of children, since it is a potential
source of danger.

TECHNICIANS' manual
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I.IV.INSTALLATION
Electrical hazard
High temperature hazard
Risk of explosion
It is prohibited to perform maintenance
on moving components
Installation operations must always and exclu-
sively be performed by the Technician and in
compliance with the current health and safety
regulations.
The appliance’s water supply must provide wa-
ter which is suitable for human consumption,
and must conform with the regulations in force
in the place of installation.
The Technician must carry out the hydraulic
connections in accordance with the hygiene
and hydraulic safety standards regarding envi-
ronmental protection which are in force in the
place of installation.
To ensure electrical safety, the appliance must
be connected to an eective earthing system,
and the system in which it is installed must
be equipped with a suitable dierential circuit
breaker, in compliance with the safety laws
and standards.
The eectiveness of the earthing system and
functionality of the dierential circuit breaker
- both of which are fundamental for guaran-
teeing the appliance’s electrical safety - are
the responsibility of the person in charge of
the electrical system on which the equipment
is installed.
The manufacturer cannot be considered re-
sponsible for any damage caused by an inad-
equate electric system.
Make sure that the electric mains power is
enough to supply the energy needed for the
machine to correctly operate.
The appliance installation operations must be
carried out with the electrical mains switched
o. To make the electrical system safe and be
able to carry out operations when the machine
is not powered, the Technician must apply the
rules prescribed by current technical standards
(disconnect the power supply, avoid reclosures,
check that there is no voltage, etc.).
I.V. MAINTENANCE AND CLEANING
Electrical hazard
High temperature hazard
Risk of explosion
The only personnel authorised to ac-
cess the service area are those who are
knowledgeable about and have practical expe-
rience using the appliance, particularly in re-
gards to safety and hygiene.
Maintenance and cleaning operations must
always and exclusively be performed by the
Technician and in compliance with the current
health and safety regulations.
The maintenance and cleaning operations
must comply with the safety regulations:
• Do not carry out maintenance work when
the machine in operation.
• Do not immerse the machine in water.
• Do not spill liquids on the machine or use
water jets when cleaning.
• Do not allow maintenance and cleaning op-
erations to be carried out by children or in-
competent people.
• Do not perform maintenance and cleaning
operations other than those described in
this manual.
When cleaning, pay attention to the parts of
the machine that can become hot:
• Avoid contact with the dispensing group,
water spouts and steam nozzles.
• Do not place your hands or other body parts
near the steam, hot water or milk dispens-
ing nozzle tips.
If gas is used (where applicable), take special

TECHNICIANS' manual
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care with the following:
• When indoors, always provide air vents.
• Check for any gas leaks.
• Do not under any circumstances attempt
to light the gas without first installing the
proper injector.
• Do not start up the gas burners when the
heating unit is empty.
Only perform the maintenance and cleaning
operations indicated in this manual.
If the problem cannot be resolved, switch o
the machine and contact the Manufacturer.
All maintenance operations must be carried
out when the power supply has been turned
o, the water mains has been closed o, and
the machine has completely cooled down.
After maintenance and/or repair work, the
components that are used must ensure that
the hygiene and safety requirements initially
provided for the appliance are still met. These
are met by only using original spare parts.
When components which come into contact
with water or food are repaired or replaced, a
washing procedure has to be carried out, as if it
were the first installation.
The Technician must inform the User
about the methods of periodic testing
of pressure equipment and safety devices in
accordance with the legislation in force in the
country of installation.
I.VI.EMERGENCY SITUATIONS
Should an emergency situation occur as a result
of a machine malfunction, adopt the measures
provided for in the emergency plan posted in
the premises and in any case, proceed to im-
mediately carry out the actions based on the
type of problem.
SHORT CIRCUIT FIRE
In the event of a fire caused by the machine’s
electrical system malfunctioning, adopt the
following behaviours:
• Disconnect the machine from the power
mains via the main switch.
• Call the fire and rescue service.
• Get everyone a safe distance away from the
premises.
• Extinguish the flames using a CO2 fire ex-
tinguisher.
GAS LEAK
In the event of a fire caused by the machine’s
system malfunctioning, adopt the following
behaviours:
• Shut o the gas supply by closing the valve
upstream of the machine.
• Get everyone a safe distance away from the
premises.
• Ventilate the premises.
• Call the technician that installed the ma-
chine.
• If necessary, call the fire and rescue service.
GAS LEAK FIRE
In the event of a fire caused by the machine’s
gas system malfunctioning, adopt the follow-
ing behaviours:
• Shut o the gas supply by closing the valve
upstream of the machine.
• Disconnect the machine from the power
mains via the main switch.
• Call the fire and rescue service.
• Get everyone a safe distance away from the
premises.
• Extinguish the flames using a CO2 fire ex-
tinguisher.

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Table of contents
1. INTRODUCTION.................................................................... 7
1.1 Guidelines for reading the Manual....................................7
1.2 Storing the Manual...................................................................7
1.3 Method for updating the Instruction Manual..............7
1.4 Recipients......................................................................................7
1.5 Glossary and Pictograms........................................................8
1.6 Guarantee.....................................................................................9
2. MACHINE IDENTIFICATION............................................ 9
2.1 Make and model designation..............................................9
2.2 General description...................................................................9
2.3 The manufacturer’s customer service..............................9
2.4 Intended use.............................................................................10
2.5 Machine diagram ...................................................................11
2.6 Front command pushbutton panels ..............................12
2.7 Componenti interni................................................................13
2.8 Data and marking..................................................................14
3. TRANSPORT AND HANDLING .......................................20
3.1 Safety precautions.................................................................20
3.2 PPE features ..............................................................................20
3.3 Dimensioni e peso..................................................................20
3.4 Handling the packed machine .........................................20
3.5 Unpacking the machine......................................................20
4. STORAGE.................................................................................21
4.1 Overview .....................................................................................21
4.2 Storing the machine after operation.............................21
5. INSTALLATION.....................................................................21
5.1 Safety precautions.................................................................21
5.2 PPE features ..............................................................................21
5.3 Environmental conditions...................................................21
5.4 Installation and operation spaces..................................22
5.5 Support base.............................................................................22
5.6 Drilling the support base.....................................................24
5.7 Hydraulic connection ............................................................24
6. COMMISSIONING ..............................................................26
6.1 Safety precautions.................................................................26
6.2 Preparingthelterholders.................................................26
6.3 Cupwarmer(iftted)...........................................................26
6.4 Lighting(iftted) ...................................................................27
6.5 Autosteamer(iftted).........................................................27
6.6 Turning the machine on and off......................................27
6.7 Water renewal..........................................................................28
6.8 Dispensing coffee...................................................................28
6.9 Dispensing steam...................................................................29
6.10 Dispensing hot water ...........................................................30
6.11 Tips for a good cup of coffee ............................................30
7. MAINTENANCE AND CLEANING .................................31
7.1 Safety precautions.................................................................31
7.2 PPE features ..............................................................................31
7.3 Bodywork removal .................................................................31
7.4 Maintenance ............................................................................32
7.5 Waterltermaintenance....................................................34
7.6 Water softener regeneration.............................................36
7.7 Malfunctions and solutions................................................37
7.8 Warnings ....................................................................................39
7.9 Cleaning operations..............................................................40
8. SPARE PARTS .........................................................................41
9. DECOMMISSIONING ........................................................42
9.1 Short period of machine inactivity.................................42
9.2 Long period of machine inactivity..................................42
10. DISASSEMBLY.......................................................................42
11. DISPOSAL ...............................................................................42
11.1 Disposal information.............................................................42
11.2 Environmental information................................................42
12. WIRING DIAGRAMS..........................................................43
12.1 ELECTRIC MAINS connection ......................................43
12.2 Power supply wiring diagram ............................................44
12.3 Electronic control unit...........................................................45
12.4 Connector connection..........................................................46
12.5 Push button panel connector............................................47
12.6 LED Power Supply Connection..........................................47
13. HYDRAULIC DIAGRAMS ..................................................48
13.1 Hydraulic Diagram EVD/2...................................................48
13.2 Hydraulic Diagram EVD/3...................................................49

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1. INTRODUCTION
Read this manual carefully. It provides important safety infor-
mation to the Technician regarding the operations indicated in
this document.
Keep this Manual in a safe place. If you lose it, you can ask the
Manufacturer for another copy.
The Manufacturer of the appliance cannot be held responsible
for any damage caused due to the non-observance of the re-
quirements listed in this manual.
Before carrying out operations on the machine, read
the instructions contained in this publication and
follow the guidelines carefully. Keep this manual
and all attached publications in an accessible and secure place.
This document assumes that the machine is installed in a lo-
cation where the current work safety and hygiene standards
are observed.
The instructions, drawings and documentation contained in
this Manual are technical and confidential. They are the sole
property of the Manufacturer, and may not be fully or partially
reproduced in any way.
The Manufacturer reserves the right to make any improve-
ments and/or modifications to the product. We guarantee
that this Manual reflects the technical state of the appliance
at the time it was released to the market.
We encourage the Technicians to make any proposals in re-
gards to improving the product or its Manual.
1.1 Guidelines for reading the Manual
This Manual is divided into separate chapters. The chapter or-
der is linked to the temporal logic of the life of the machine.
Terms, abbreviations and pictograms are used to facilitate the
immediate understanding of the text.
This Manual consists of cover, index and series of chapters.
Each chapter is sequentially numbered. The page number is
shown in the footer.
The machine identification data is displayed on the machine’s
nameplate and the EU declaration of Conformity, whilst the
date and revision of the Instruction Manual is provided on the
last page.
Abbreviations
Sec. = Section
Chap. = Chapter
Para. = Paragraph
P. = Page
Fig. = Figure
Tab. = Table
Units of measurement
The units of measurement are those provided by the Interna-
tional System (SI).
1.2 Storing the Manual
The Instruction Manual must be stored carefully. The manual
should be stored, handled with care with clean hands and not
placed on dirty surfaces. The Manual must be stored in an en-
vironment protected from moisture and heat.
Do not remove, tear or arbitrarily modify any of its parts.
On the Technician's request, the manufacturer can provide ad-
ditional copies of the machine's Instruction Manual.
1.3 Method for updating the Instruction
Manual
The Manufacturer reserves the right to modify and make im-
provements to the machine without providing notice or updat-
ing the Manual that has already been received.
Should the Manual become illegible or otherwise hard
to read, the Technicians must request a new copy
from the Manufacturer before carrying out any opera-
tions on the machine.
It is absolutely forbidden to remove or rewrite parts of the Man-
ual.
The instructions, drawings and documentation contained in this
manual are confidential and the sole property of the Manufac-
turer. They may not be reproduced in any way, either in full, or
in part without prior authorisation.
The Technician is responsible for complying with the instruc-
tions contained in this Manual.
Should any incident occur as a result of these recommendations
being used incorrectly, the Manufacturer declines any liability.
This manual is also available on the manufacturer's website
shown on the cover of the manual.
1.4 Recipients
This Manual is intended for the Technician who is responsible
for carrying out the following operations on the machine:
• Transport and handling;
• Storage;
• Installation;
• Commissioning;
• Maintenance;
• Cleaning;
• Spare part replacement;
• Emergency operations and faults;
• Decommissioning;
• Disassembly;
• Disposal (refer to the retailer if not directly responsible).

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RECIPIENT QUALIFICATIONS
The machine is intended for a professional non-generalised
use, therefore the Technician must:
• Have attended the training courses organised by the Man-
ufacturer relating to the type of machine;
• be aged 18 and over;
• be physically and mentally fit to use the machine;
• be able to understand and interpret the Instruction Manual
and the safety requirements;
• know the safety procedures and how they are implement-
ed;
• be able to use the machine;
• have understood the procedures of use as defined by the
machine's manufacturer.
1.5 Glossary and Pictograms
This paragraph lists uncommon terms or terms whose mean-
ings are dierent than those most commonly used.
Abbreviations are explained below, as well as the meaning of
pictograms describing the operator's qualification and the ma-
chine status; they are used to quickly and uniquely provide the
information needed to correctly and safely use the machine.
1.5.1 Glossary
User
The person in charge of operating the machine and performing
the routine cleaning operations indicated in this manual.
Technician
A specialised person who has been specially trained and au-
thorised to carry out the following operations in accordance
with current regulations: transport and handling, storage, in-
stallation, commissioning, maintenance, decommissioning,
dismantling and disposal of the machine.
Danger
A potential source of injury or damage to health.
Dangerous area
Any area in the vicinity of the machine where the presence of
a person constitutes a risk to the safety and health of that
person.
Risk
Combination of the probability and severity of an injury or
damage to health that can arise in a hazardous situation.
Guard
Machine component used specifically to provide protection by
means of a physical barrier.
Personal protective equipment (PPE)
Clothing or equipment worn by someone to protect their
health or safety.
Intended use
The use of the machine in accordance with the information
provided in the instructions for use.
Machine status
The machine status includes the mode of operation and the
condition of the machine's safety devices.
Residual risk
Risks that remain despite adopting the protective measures
integrated into the machine's design and despite the guards
and complementary protective measures that have been
adopted.
Safety component:
• Designed to perform a safety function.
• whose failure and/or malfunction endangers the safety of
persons.
1.5.2 Pictograms
Descriptions preceded by these symbols contain very impor-
tant information/requirements, particularly in regards to safe-
ty. Failure to comply with these may result in:
• A safety risk for those operating the machine.
• User injury, including serious injury (in some cases even
death).
• The guarantee being rendered null and void.
• The Manufacturer waiving liability.
GENERAL DANGER symbol used when there is a risk
of permanent serious injury that would require hospi-
talisation, or in extreme cases, even cause death.
ELECTRICAL HAZARD symbol used when there is a
risk of permanent serious injury that would require
hospitalisation, or in extreme cases, even cause
death.
HIGH TEMPERATURE HAZARD symbol used when
there is a risk of permanent serious injury that would
require hospitalisation, or in extreme cases, even
cause death.
HAND CRUSHING RISK symbol used when there is a
risk of permanent serious injury that would require
hospitalisation, or in extreme cases, even cause
death.
EXPLOSION RISK symbol used when there is a risk of
permanent serious injury that would require hospi-
talisation, or in extreme cases, even cause death.
CAUTION symbol used when there is a risk of minor
injury that could require medical attention.

TECHNICIANS' manual
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WARNING symbol used when there is a risk of minor
injury that could be treated with first-aid or similar
measures.
NOTE symbol used to provide important information
about the topic.
It is prohibited to perform maintenance on moving
components as there is a risk of permanent serious in-
jury that could require hospitalisation.
Mandatory symbol indicating that safety gloves must
be worn; used when there is a risk of permanent seri-
ous injury that would require hospitalisation.
Mandatory symbol indicating that eye protection must
be used when there is a risk of permanent serious in-
jury that would require hospitalisation.
Mandatory symbol indicating that safety shoes must
be used when there is a risk of permanent serious in-
jury that would require hospitalisation.
Mandatory symbol indicating that the documentation
must be read; used to make the Technician aware of
the importance of this action for their safety.
1.6 Guarantee
All of the machine's components are covered by a 12-month
guarantee, except for electrical and electronic components
and parts prone to wear and tear.
If any work is carried out on the machine electronics when the
machine is still live, any guarantee will automatically be in-
validated.
2. MACHINE IDENTIFICATION
2.1 Make and model designation
The machine and model ID information is found on the machine's NAMEPLATE and in the provided EU DECLARATION OF CON-
FORMITY.
2.2 General description
The machine described in this Manual consists of mechanical, electrical, and electronic components which, when used together,
produce milk, coee and water-based beverages. This product is manufactured in compliance with the EU Directives, Regula-
tions and Standards indicated in the EU DECLARATION OF CONFORMITY provided with the machine.
2.3 The manufacturer’s customer service
WEGA MACCHINE PER CAFFÈ S.R.L.
Via Condotti Bardini, 1
31058 SUSEGANA (TV) - ITALY
Tel. [phone] - Fax [phone]
E-mail: [email protected] - Web-site: www.wega.it

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2.4 Intended use
The espresso coee machine has been designed to profession-
ally prepare hot beverages such as tea, cappuccinos and weak,
strong and espresso coee, etc. The appliance is not intended
for domestic use, it is intended for professional purposes only.
The machine can be used under all the conditions set forth,
contained or described in this document; any other conditions
must be considered dangerous. The machine must be installed
in a place where its access is restricted to qualified personnel
only who have received suitable training (coee shops, restau-
rants, etc.).
Permitted uses
All uses compatible with the technical features, operations
and applications described in this document which do not en-
danger the safety of users or can cause damage to the ma-
chine or its surrounding environment.
All uses not specifically mentioned in this Manual are
prohibited and must be expressly authorised by the
Manufacturer.
Intended uses
The machine has been designed exclusively for professional
use. The use of products/materials other than those specified
by the Manufacturer, which can cause damage to the machine
and be dangerous for the operator and/or those in close prox-
imity to the Machine, is considered incorrect or improper.
Contraindications of use
The machine must not be used:
• for uses other than those indicated in this paragraph or for
uses that dier from or are not mentioned in this Manual.
• with materials other than those listed in this Manual.
• with safety devices that have been disabled or are not
working.
Incorrect use of the machine
The type of application and performance that this machine
has been designed for, requires a number of operations and
procedures that cannot be changed, unless previously agreed
with the Manufacturer. All permitted behaviours are indicated
in this document; any operation not listed and described here-
in is to be considered improper and therefore, hazardous.
Improper use
The only permitted uses are described in the Manual; any oth-
er use is considered improper and therefore, hazardous.
General safety features
The Technician must be aware of accident risks, safety devices
and the general safety rules set forth in EU directives and by
the legislation of the country where the machine is installed.
The Technician must know how all the machine's devices work.
They must also have fully read and understood this Manual.
Maintenance work must be performed by the Technician after
the machine has been properly prepared. The tampering or un-
authorised replacement of one or more machine components,
the use of accessories which modify its use and the use of
materials other than those recommended in this Manual, can
cause accidents.

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2.5 Machine diagram
1. Power switch.
2. Machine on indicator light.
3. Heating unit water level indicator light.
4. Hot water nozzle.
5. Coee pushbutton panel.
6. Services pushbutton panel.
7. Cup warmer shelf.
8. Steam knob.
9. Scald protection.
10. Steam nozzle.
11. Adjustable foot.
12. Filter holder.
13. Cup holder grille.
14. Raised cup grilles.
15. Pressure gauge.
16. Work surface light switch.
17. Coee / Autosteamer pushbutton panel (Optional).
18. Steam nozzle / Autosteamer (Optional).
19. Blind filter
20. Presser
21. Cleaning brush
4
56 617
151112
1 2
0
1
2 3
13 14 14 16
8
8
9
18
9
10
7
19
20
21

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2.6 Front command pushbutton panels
1 espresso
1 large coee
2 espressos
2 large coees
Stop Program-
ming / Conti-
nous
AUTO
STEAM
STOP
PROG.
AUTO
STEAM
STOP
PROG.
Autosteamer
(Optional)
Key pos.
OFF
Key pos.
ON
Manual
dispensing
switch
Hot water dis-
pensing switch
Cup warmer
(Optional)

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2.7 Componenti interni
22. Heating unit.
23. Internal motor pump.
24. Water dispenser.
25. Drain tray.
26. Dispensing group.
27. Mixed hot water regulator. *
28. Machine power switch.
29. Power supply fuses (EU version).
30. Power supply fuses (UL version).
31. Electronic control unit.
32. Pressure switch.
33. Volumetric dosing device.
34. Safety thermostat.
35. Telemetry device. *
36. Autosteamer control unit. *
37. Autosteamer air regulator. *
38. Autosteamer air pump. *
39. Autosteamer fuse. *
* Optional device.
22
242627 252829
36 23 37
38
32
33
34
31
30
39
35

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2.8 Data and marking
The machine’s general technical data is provided in the follow-
ing table:
TECHNICAL DATA 2GR 3GR
220-240 V
3.650-4.650 W 5.150 W
380-415 V
Frequency 50-60 Hz 50-60 Hz
Heating unit 9,5 l 15,5 l
Dimensions (LxWxH) 745x575x605 mm 985x575x605 mm
Safety valve
calibration 0,19 MPa (1,9 bar) +/- 0,015 MPa
Heating unit
operating pressure 0,08 - 0,14 MPa (0,8 - 1,4 bar)
Mains water
pressure 0,15 - 0,6 MPa MAX (1,5 - 6 bar MAX)
Coee dispensing
pressure 0,8 - 0,9 MPa (8 - 9 bar)
Working environ-
ment temperature 5 - 35°C 95° U.R.MAX
Sound pressure level < 70 dB
In compliance with directive 2006/42/CE, the machine is
marked with the CE code with which the manufacturer de-
clares under his responsibility that the machine is safe for per-
sons and things.
Alternative markings can be axed according to the target
markets, provided they comply with current product regula-
tions.
The nameplate which provides the appropriate markings,
identification data and specific technical data, is axed under
the drain tray.
An example of a nameplate is provided below.
When contacting the Manufacturer, always provide the follow-
ing information:
• S/N - machine serial number.
• Mod. - machine model.
• Y - year of manufacture.
The appliance data can also be found on the label located on
the machine's packaging.
The nameplate is axed under the drain tray
It is forbidden to remove or modify the nameplate.
Should it deteriorate or become illegible, contact the
Manufacturer.
To correctly connect the machine to the electric mains,
refer to Chap. "12. WIRING DIAGRAMS" on page 43.
Via
C.
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GANA
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ALY
Tel. [phone] - Fax [phone]
MADE IN IT
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S/N:
Mod
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TRADEMARK

TECHNICIANS' manual
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2.8.1 Heating unit
The heating unit is made of copper sheet metal (22). The
heat exchangers (B) are assembled onto this unit and are in
turn connected to the dispensing group. The water used for
dispensing coee is taken directly from the heat exchanger.
During the dispensing process, cold water is sent inside the
exchanger by means of the motor pump. Cold water and the
pre-existing hot water are mixed together inside the heat ex-
changer, in order to obtain the optimal water temperature for
coee infusion.
The heating unit is electrically heated by an electric heating
element immersed in the water (A).
B
A
22
2.8.2 Overflow device
The cover installed on the pressure relief valve makes it pos-
sible to collect any water and steam which may leak from the
heating unit due to a malfunction and channel it to the drain
tray, via a special hose.
2.8.3 Pressure relief safety valve
The pressure relief safety valve has a calibration of
0.19 MPa (1.9 bar) in order to ensure that the pres-
sure in the steam heating unit does not exceed 0.21
MPa (2.1 bar). Should a fault occur, the capacity of
the valve is such as to be able to eliminate all the
excess pressure in the heating unit.
The safety valve should be checked regularly as indi-
cated in Chap. "7. MAINTENANCE AND CLEANING" on
page 31.
2.8.4 Multifunctional dispenser
It consists of an expansion valve and an internal check valve.
• Expansion valve (A): The cold water sent from the pump to
the heat exchangers is heated. This heating causes an in-
crease in the volume of water. To
limit pressure increases in the
hydraulic circuit, the valve limits
the maximum internal pressure
of the circuit to 1.2 MPa (12 bar).
• Internal check valve (B): Its
function is to prevent water
from backflowing into the ma-
chine’s internal hydraulic circuit
from the heat exchangers.
2.8.5 Negative pressure valve
The purpose of the negative pressure valve is to pre-
vent liquids from back-flowing through the steam
nozzle when they are being heated. Furthermore, the
excess air inside the heating unit is removed during
the machine's heating phase.
2.8.6 Pressure switch
The pressure switch makes it possible
to control the heating unit pressure by
activating or bypassing the heating ele-
ment in the heating unit. Any pressure
switch calibration can be carried out
with the machine in operation by turn-
ing the screw (A) located on the body of
the component.
B
A
A

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2.8.7 Dispensing group
In this system, the dispensing group (26) is heated by a ther-
mosiphonic circuit (A) connected to the heat exchanger (B).
The same water is used for the coee dispensing, thus ensur-
ing the same temperature for all coee servings:
• The solenoid valve and the pump are activated in order to
send cold water to the exchanger (B) through the injector
(C).
• The heating unit water is carried from the exchanger (B) to
the group (26) for dispensing;
• the pump allows the increase of the pressure of the water
flow up to 8-9 bar for dispensing.
The injector (C) and flow reducer (D) are important compo-
nents for the dispensing group’s operation.
To increase the coee extraction temperature, remove the
flow reducer (D) or replace it with one that has a bigger diam-
eter. To decrease the temperature, replace it with one that has
a smaller diameter.
Water
inlet
Dispensing
coee
DISPENSING
D
B
C
A
26
B
IDLE
When replacing the solenoid valve (E), make sure that it is po-
sitioned correctly. The assembly must be as such that the two
holes (F) on the body of the group are aligned with the two
gaskets (G) on the solenoid valve.
E
G
F
2.8.8 Safety thermostat
The thermostat prevents any damage occurring to the electri-
cal heating element if there is no water in the heating unit.
The thermostat bulb (A) is located inside a sheath (B) in the
middle of the heating elements. The thermostat contacts (C)
are connected to the electric heating element (D). If the elec-
tric heating element is exposed due to a failure to fill the heat-
ing unit with water, the temperature of the heating element
increases dramatically. At this point, the thermostat cuts the
power supply to the heating element in order to prevent dam-
age occurring
D
C
E
A
B
To reset the thermostat, press the centre button (E).
However, before starting the machine up again, iden-
tify what prevented the water from being fed into the
heating unit.
2.8.9 Motor pump
This component feeds the machine
by increasing the water pressure to
0.8-0.9 MPa (8-9 bar) in order to dis-
pense coee and automatically fill
the heating unit.

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2.8.10 Electronic control unit
The electronic control unit is installed on the
EVD versions.
Its purpose is to electronically control the cof-
fee dose via the water flowing through the
dosing device and to check that the heating
unit is being filled with water.
Some versions of the control unit are set up to
be connected to the dispensing accounting systems by means
of a specific interface device.
2.8.11 Automatic Water Entry
The Automatic Water Entry system is designed to check the
water level in the heating unit. It consists of:
• A probe inserted into the heating unit (A) consisting of a
stainless steel rod.
• The standard control unit (31) on EVD versions.
• A hydraulic circuit with a solenoid valve controlled by the
regulator.
The electronic control unit controls the level of water in the
heating unit. When the level of water in the heating unit
drops, the contact with the probe is interrupted. The control
unit sends an impulse to the inlet solenoid valve and the mo-
tor pump, which are then activated until the normal level of
water in the heating unit has been restored.
To avoid any flooding caused by machine malfunctions or water
leaks in the circuit, the electronic control unit has a “Timeout”
feature which cuts o the automatic water filling function af-
ter a certain time (2 minutes). The LED (3) located on the front
of the machine body comes on to indicate activation of this
system. When installing machines with three or four groups,
the initial water filling time may exceed the established time-
out limit. Should this occur, simply turn the machine o and
then back on to restore normal operating conditions.
2.8.12 Volumetric dosing
The volumetric dosing device
that is installed on the EVD
versions, measures the quan-
tity of water sent to the group
in order to dispense coee.
The dispenser generates elec-
trical impulses which are sent
to the electronic control unit.
These impulses are read by the
control unit and counted while the dose is being programmed.
The flashing LED light (A) indicates that the electrical impulse
has been sent from the dosing device to the control unit.
2.8.13 Electronic pushbutton panels
The electronic pushbutton panels (5), (17) allow the coee
doses to be selected and programmed. They are connected to
the electronic control unit.
To use and programme these, please consult the user manual.
517
2.8.14 Cup warmer
The cup warmer device (7) warms the cups before they are
used.
7
A
31
A
1 2
0
3

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2.8.15 Hot water spout
The hot water pipe is connected to a suction pipe of the boiler.
Dispensing takes place by selecting a button (B) which acti-
vates the dispensing solenoid valve (A)
A
B
C
The mixing system (C), if present, allows the regulation of the
temperature of the water supplied. See par.: 6.10.3 on page
30.
2.8.16 Steam nozzle
The steam nozzle is connected to the top of the heating unit.
Steam is delivered by moving the lever (D).
D
2.8.17 Water filter
In the mains water, non-soluble salts are
present which cause limestone to form
in the heating unit and other parts of the
machine.
Drinking water can also contain heavy
metals and substances, such as chlorine
which are harmful to health.
The filter makes it possible to eliminate or
substantially reduce the presence of these
mineral salts.
The cartridge contained in the water filter
must be replaced at the frequency speci-
fied by the manufacturer.
To use and maintain the water filter, follow the in-
structions provided in para. "7.5 Water filter mainte-
nance" on page 34
2.8.18 Water softener
The resin softener can be used as an alternative to the water
filter.
This component has the property of retaining the calcium con-
tained in the water. For this reason, the resins
become saturated after a certain period and
must be regenerated with coarse kitchen salt
(NaCl, sodium chloride) or special water sof-
tening salt. It is very important to regenerate
the softener within the established times.
However, in locations where the water is very
hard, it will be need to be regenerated more
frequently. The same rule can be applied to
locations where there is a large consumption
of hot water (for tea, etc.).
To use and regenerate the water softener, follow the
instructions provided in para. "7.6 Water softener re-
generation" on page 36.

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2.8.19 Autosteamer (optional)
The “Autosteamer” system - fitted on some versions with a
display - enables milk to be automatically frothed at the pro-
grammed temperature. The operating principle of the Au-
tosteamer is listed below:
• Press the (AUTOSTEAM) button on the right
pushbutton;
• The solenoid valve opens (A) which conse-
quently allows the steam to flow from the
heating unit to the Autosteamer nozzle;
• The system simultaneously activates the air suction pump
(B) which is controlled by the control unit (C) and powered
by the transformer (D). The milk froth can be adjusted by
changing the amount of air intake when opening the valve
(E).
• After the air has passed through the non-return valve (F), it
mixes with the steam in the mixing interface (G).
• Steam comes out of the nozzle (H);
• The probe (H) that is connected to the machine’s electronic
control unit, detects the temperature of the milk while it is
being heated;
• Once the set milk temperature has been reached, the
electronic system stops the air and steam from being dis-
pensed.
To adjust the milk temperature and froth, see para.
6.5.1 and 6.5.2 on page 27.
AUTO
STEAM
STOP
PROG.
AG
D
F
B
E
H
C

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3. TRANSPORT AND HANDLING
3.1 Safety precautions
Carefully read the instructions provided in chapter
"I. SAFETY PRECAUTIONS" on page 3.
3.2 PPE features
When transporting the machine, the following PPE is required:
The use of protective gloves is mandatory.
The use of safety shoes is mandatory.
3.3 Dimensioni e peso
Modello 2GR 3GR
Peso lordo
massimo 80 kg 90 kg
3.4 Handling the packed machine
Upon arrival, the machine must be unloaded and handled with
care, carefully following the instructions on the packaging, or
those contained in this Manual.
It is very important to check that the maximum
load capacity of each piece of lifting equipment, is
at least equal to the weight of the loads to be lifted
plus the safety margins which are required by current stand-
ards.
3.5 Unpacking the machine
Only remove the machine from its packaging when it is ready
to be installed, in order to prevent accidental collisions which
could damage it:
• Open the packaging, taking care not to damage the ma-
chine.
• Remove and take out the machine guards and equipment
inside the packaging.
• Remove the machine.
• Dispose of the packaging in compliance with the current
waste regulations.
After unpacking the machine, check that there are
no damaged parts due to transport or missing
parts. Should there be any, immediately inform (no
later than 7 days after delivery) both the CARRIER and the
MANUFACTURER, by indicating the machine data and pro-
viding photographic evidence.
We recommend that you keep the packaging until the guar-
antee has expired.
Wood, nails, staples, cardboard: non-polluting material
which must be recycled properly.
Plastic: polluting material that must not be burned (danger
of toxic fumes), nor disposed of as normal waste; to be dis-
posed of according to current regulations.