Beretta C.A.I. 24kW Operation and installation manual

1
EXCLUSIVE
C.A.I.
R.A.I.
MIX C.S.I.
MIX R.S.I.
EN INSTALLER AND USER MANUAL
ES MANUAL DE INSTALACIÓNY USO
PT MANUAL PARA INSTALAÇÃO E USO
FR MANUEL D’INSTALLATION ET D’UTILISATION

2
English
EXCLUSIVE boiler complies with basic requirements of
the following Directives:
• Gas directive 90/396/EEC
• Yield directive 92/42/EEC
• Electromagnetic compatibility directive 89/336/EEC
• Low-voltage directive 73/23/EEC
Thus, it is EC-marked
La chaudière EXCLUSIVE est conforme aux
prescriptions essentielles des Directives suivantes:
• Directive gaz 90/396/CEE
• Directive rendements 92/42/CEE
• Directive compatibilité électromagnétique 89/336/
CEE
• Directive basse tension 73/23/CEE
et peut donc être estampillée CE
Français
0694
51BP2736 (MIX C.S.I. - MIX R.S.I.)
51BP2679 (C.A.I. - R.A.I.)
Español
La caldera EXCLUSIVE es conforme a los requisitos
esenciales de las siguientes Directivas:
• Directiva gas 90/396/CEE
• Directiva rendimientos 92/42/CEE
• Directiva compatibilidad electromagnética 89/336/
CEE
• Directiva baja tensión 73/23/CEE
y por lo tanto es titular de la marca CE
Portugûes
A caldeira EXCLUSIVE está conforme com os requisitos
essenciais das seguintes Directivas:
• Directiva gás 90/396/CEE
• Directiva rendimentos 92/42/CEE
• Directiva compatibilidade electromagnética 89/336/
CEE
• Directiva baixa tensão 73/23/CEE
é portanto titular de marcação CE

3
Installer’s-user’s manual ........................................... 4
Boiler operating elements ................................. 91-92
Hydraulic circuit .................................................. 93-94
Electric diagrams ................................................ 95-98
Circulator residual head ....................................... 102
This handbook contains data and information for both users and installers. In detail:
- the chapters entitled “Installing the boiler, Water connections, Gas connection, Electrical connection, Filling and draining,
Evacuating products of combustion,Technical data, Programming parameters, Gas regulation and conversion”are intended
for installers;
- the chapters entitled“Warnings and safety devices, Switching on and using” are for both users and installers.
The control panel is different between C.A.I.-MIX C.S.I. and R.A.I.-MIX R.S.I. (see detail). Please read, in the booklet, the instructions
referring to your boiler model.
English
The following symbols are used in this manual:
CAUTION = operations requiring special care and adequate preparation
NOT ALLOWED = operations that MUST NOT be performed
C.A.I. - MIX C.S.I. R.A.I. - MIX R.S.I.
Manual para el instalador-usuario ........................ 46
Elementos funcionales de la caldera .............. 91-92
Circuito hidráulico .............................................. 93-94
Esquema eléctrico .............................................. 95-98
Altura de carga residual del circulador ................... 102
Este manual contiene datos e informaciones destinados tanto al usuario como al instalador.En especial:
- los capítulos “Instalación de la caldera, Conexiones hidráulicas, Conexión gas, Conexión eléctrica, Llenado y vaciado,
Evacuación productos de la combustión, Datos técnicos,Programación parámetros, Regulación yTransformación gas”son
los que se refieren al instalador;
- los capítulos“Advertencias y seguridades, y Encendido y funcionamiento”son los que se refieren tanto al usuario como al
instalador.
El panel de mando es diferente entre los modelos C.A.I.-MIX C.S.I. y R.A.I.-MIX R.S.I. (ver dibujo). Rogamos consulten el manual
para encontrar las instrucciones relativas a su modelo de caldera.
Español
En algunas partes del manual se utilizan los símbolos:
ATENCIÓN = para acciones que requieren particular atención y una adecuada
preparación
PROHIBIDO = para acciones que NO DEBEN efectuarse nunca
Manuel d’installation-utilisateur ........................... 25
Eléments fonctionnels de la chaudière .......... 91-92
Circuit hydraulique............................................. 93-94
Schéma électrique .............................................. 95-98
Prévalence résiduelle du circulateur .................. 102
Ce manuel contient des données et des informations destinées à l’utilisateur et à l’installateur. Plus précisément:
- les chapitres “Installation de la chaudière, Raccordements hydrauliques, Raccordement du gaz, Branchement électrique,
Remplissage et vidage, Evacuation des produits de la combustion, Données techniques, Configuration des paramètres, Réglage
etTransformation gaz ”s’adressent spécifiquement à l’installateur;
- les chapitres“Avertissements et mesures de sécurité, Allumage et fonctionnement”s’adressent à l’utilisateur et à l’installateur.
Le panneau de commande est différent entre les models C.A.I.-MIX C.S.I. et R.A.I.-MIX R.S.I. (voir dessin). On vous conseille de
consulter le manuel pour les instructions concernantes votre chaudière.
Français
Dans ce manuel nous utilisons parfois les symboles suivants:
ATTENTION = indique les actions demandant une prudence particulière et
une préparation adéquate
INTERDICTION = indique les actions NE DEVANT JAMAIS être exécutées
R.S.I.: DHW functions refer only if a water tank is connected (accessory available
on request).
R.S.I.: Los valores del sanitario son seleccionables sólo en el caso de conexión
con un interacumulador exterior (kit accesorio opcional).
R.S.I.: Les valeurs de la fonction sanitaire sont sélectionnables seulement en cas
de connexion avec un chauffe-eau (accessoire fourni sur demande).
Portugûes
Este livrete inclui dados e informações destinados quer ao usuário quer ao instalador. Especificadamente:
- os capítulos“Instalação da caldeira, Conexões hidráulicas,Conexão gás, Ligação eléctrica,
Enchimento e esvaziamento, Evacuação dos produtos da combustão, Dados técnicos, Programação parâmetros, Regulação
eTransformação gás” são aqueles referidos ao instalador:
- os capítulos“Advertências e seguranças e Ignição e Funcionamento”são aqueles referidos quer ao usuário quer ao instalador.
Os modelos C.A.I.-MIX C.S.I. e R.A.I.-MIX R.S.I. têm os painéis de comando diferentes (veja-se o desenho). Sugerimos consultar
o manual para as instruções relativas ao seu modelo de caldeira.
Manual do instalador-usu ário .................................... 67
Elementos funcionais da caldeira ................... 91-92
Circuito Hidráulico ............................................. 93-94
Diagrama Eléctrico ............................................. 95-98
Altura total de elevação residual
da bomba circuladora ........................................... 102
Em algumas partes do manual são utilizados os símbolos:
ATENÇÃO = para acções que exigirem particular cuidado e preparação
adequada
PROIBIDO = para acções que NÃO SE DEVEM absolutamente executar
R.S.I.: Os valores do circuito sanitário podem ser seleccionados somente com a
ligação a um boiler exterior (kit acessório a pedido).

4
Boiler must only be installed by qualified personnel.
Boiler is available in the following models:
Exclusive C.A.I. is a B11BS-type wall-mounted boiler for DHW
production and heating; Exclusive R.A.I. is a B11BS-type wall-
mounted boiler for heating. This kind of appliance can’t be installed
in bedrooms, bathrooms or in those rooms where a fireplace without
an air intake system should be present.
Exclusive MIX C.S.I. is a C-type wall-mounted boiler for heating
and producing domestic hot water; Exclusive MIX R.S.I. is a C-type
wall-mounted boiler and is able to operate in different conditions:
-CASE A: only heating. The boiler doesn’t supply domestic hot water
-CASE B: only heating with water tank connected, managed by a
thermostat, to prepare domestic hot water
-CASE C: only heating with water tank connected (kit available
upon request), managed by a temperature sensor, to prepare
domestic hot water. Connecting a water tank not supplied by us,
please be sure that the NTC sensor ised has the following
features: 10 kOhm at 25°C, B 3435 ±1%.
Depending on the type of installation selected, it is necessary to set
the parameter “domestic hot water mode”. Refer to page 22 for
description and setting parameter operations.
This type of appliance can be installed in any kind of room as long
as the fumes discharge and the comburent air intake are taken
outside the room.
The following types of fumes outlet are available for this kind of
boiler: C12,C12x; C22; C32,C32x; C42,C42x; C52,C52x (26kW
and 30kW only); C62,C62x; C82,C82x. Installation must comply
with local standards and regulations in force.
For proper installation, we remind you that:
• the boiler must not be installed over a kitchen or any other cooking
equipment
• minimum spaces are to be left in order to allow maintenance
operations: at least 2,5 cm every side and 20 cm under the boiler
• it is forbidden to leave inflammable substances in the room
• suitably insulate heat-sensitive walls (e.g.: in wood).
2.BOILER INSTALLATION
Model Type Category Power
C.A.I. Combined B11BS 24 kW
C.A.I. Combined B11BS 28 kW
R.A.I. CH only B11BS 28 kW
MIX C.S.I. Combined C 26 kW
MIX C.S.I. Combined C 30 kW
MIX C.S.I. Combined C 35 kW
MIX R.S.I. CH only C 30 kW
MIX R.S.I. CH only C 35 kW
1.GENERAL SAFETY DEVICES
The boilers produced in our factory are built with care down to
the last component to protect both the user and installer from
eventual accidents. We therefore recommend qualified
personnel that after working on the product they should pay
particular attention to the wiring, especially the bare wires,
that must not be exposed outside the terminal board for any
rason to prevent any contact with the live parts of the wiring.
This instructions manual is integral parts of the product. Make
sure they remain with the boiler, even if it is transferred to
another owner or user or moved to another heating system. In
case of loss or damage, please contact your local Technical
Assistance Service for a new copy.
This boiler may only be installed and serviced by qualified
fitters who satisfy the requirements of local rules. Work must
be done in compliance with regulations in force and
subsequent updates.
The boiler must be serviced at least once a year. This should
be booked in advance with the Technical Assistance Service.
The installer shall instruct the user in the operation of the
boiler and the safety devices.
This boiler may only be used for what it was expressly built to
do. The manufacturer declines all contractual and non-
contractual liability for injury to persons or animals or damage
to property deriving from errors made during installation,
adjustment and servicing and from improper use.
This appliance is used to produce hot water and must therefore
be connected to a heating and/or a domestic hot water system,
according to its performance and power.
After removing the packaging, make sure the contents are
undamaged and complete.If this is not the case, contact your dealer.
The safety valve outlet must be connected to a suitable
collection and venting system. The manufacturer declines all
liability for any damage caused by the safety valve.
The safety and automatic adjustment devices on the appliance
must never be modified during its lifetime, except by the maker
or dealer.
If the appliance develops a fault and/or works badly, switch it
off and do not attempt to repair it yourself.
Immediately after installation, inform the user that:
- in the event of leaks, he/she must shut off the water supply and
promptly inform the Technical Assistance Service
-C.A.I.-MIX C.S.I.: he/she must check from time to time to make
sure the symbol is not lit on the control panel.This symbol
means that the pressure in the water system is incorrect. If
necessary, fill the system as described in the paragraph
“Boiler functions”
- R.A.I.-MIX R.S.I.: must periodically check, on the display, that
the pressure value is between 1 and 1,5 bar; if not fill the
system as described in the paragraph “Boiler functions”
- if the boiler is not planned to be used for a long period, he/
she should call in the Technical Assistance Service to perform
the following operations:
• turn off the main boiler and general system switches
• close the gas and water taps on both the heating (C.A.I.-
MIX C.S.I.-R.A.I.-MIX R.S.I.) and domestic hot water circuits
(C.A.I.-MIX C.S.I. only)
• drain the heating (C.A.I.-MIX C.S.I.-R.A.I.-MIX R.S.I.) and
domestic hot water (C.A.I.-MIX C.S.I. only) circuits to prevent
freezing.
Safety measures:
the boiler should not be used by children or unassisted disabled
people
electrical devices or equipment, such as switches, appliances,
etc., should not be used if there is a smell of gas or fumes. If
there is a gas leak, open all the doors and windows to ventila-
te the area, turn off the general gas tap and immediately call
the Technical Assistance Service
do not touch the boiler barefoot or if parts of your body are wet
or damp
press the button until “- -” is shown on the display and
disconnect the electricity supply by turning off the two-position
system switch, before cleaning
it is forbidden to modify the safety or adjustment devices without
the manufacturer’s permission and relative instructions
safety system controlling exhaustion fumes (only C.A.I.
and R.A.I. models): the boiler is equipped with a system
controlling proper exhaustion of combustion products (fume
thermostat), in case of abnormality, this system immediately
stops appliance operation. Press the button to restore
functionning condition. If abnormality persists, do not perform
any action, but immediately call Technical Service. Device
controlling proper fume exhaustion must never be
deactivated.Use original spare parts only when replacing it.
do not pull, detach or twist the wires from the boiler even if
they are not connected to the power supply
do not block or reduce the size of the ventilation openings in
the room. Only C.A.I. and R.A.I. models: ventilation openings
are necessaries to a right combustion
do not leave inflammable containers or substances in the room
keep packaging out of reach of children
only use appliance for purposes it is devoted to
do not lean any object on the boiler
do not tamper with sealed elements.

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English
7.FUMES EXHAUSTION
AND BURNING AIR SUCTION (C.A.I.-R.A.I.)
Boiler is equipped with a system controlling proper exhaustion of
combustion products - fume thermostat (12, fig. 82a-82b page 91-
92); in case of abnormality, this system immediately stops appliance
operation. Press the button to restore functionning condition. If
abnormality persists, do not perform any action, but immediately
call Technical Service; technicians will correct fume exhaustion
defect and test operation.
Refer to regulations in force for burnt product exhaustion.
It is compulsory using rigid pipes, junctions between elements must
be tight and all components must be resistant to temperature,
condensates and mechanical stresses.
Device controlling proper fume exhaustion must never be
deactivated. Use original spare parts only when replacing it.
Exhaustion ducts which are not insulated can be dangerous.
Openings for burning air must comply with regulations in force.
If condensates are produced, insulate exhaustion duct.
Fig. 6b shows the top view of boiler with reference measures
for fume outlet distance between centres, from boiler support
plate.
Support plate and integrated pre-installation template are provided
for with the boiler (fig. 2).
Mounting instructions:
• fix the boiler support plate (F) with the template (G) to the wall
and use a plumb to check that it is perfectly horizontal
• trace out 4 holes (Ø 6 mm) for fixing the boiler support plate (F)
and 2 holes (Ø 4 mm) for fixing the pre-installation template (G)
• make sure all the measurements are correct, then drill holes in
the wall using a drill and point with the diameter given previously
• fix the plate to the wall by the supplied anchor screws
• make hydraulic connections.
After installing the boiler, the screws D1(fig. 3a) can be removed.
After installing the boiler and connecting it to the water and gas
supplies, fit the lower cover (A-B, fig. 3b) so that its hooks slip into
the relative slots in the lower part of the boiler. Fix the lower cover
with the screw C(fig. 3c) contained in the documentation envelope
in the boiler.
Before connecting appliance to gas pipe network, check the
following:
• regulations in force are met
• gas type used is the same as set for appliance operation
• pipes are clean.
Gas must be piped externally. If the pipe goes through a wall it
must go through the central opening in the lower part of the
template. It is recommended to install an appropriately sized filter
on the gas line in case gas from the mains contains some small
solid particles. After installation make sure that all the joints have
been made airtight conforming to standard installation practices.
4.GAS CONNECTION
Position and dimensions of hydraulic connections are specified in
figure 2:
A - CH return 3/4”
B - CH delivery 3/4”
C - gas connection 3/4”
D - DHW outlet 1/2” (C.A.I.-MIX C.S.I. only)
E - DHW inlet 1/2” (C.A.I.-MIX C.S.I. only)
F - Support plate
G - Pre-installation template
If water hardness exceeds 28°Fr, it is recommended to use water
softeners, to prevent any limestone deposit in boiler due to exces-
sively hard water.
3.HYDRAULIC CONNECTIONS
To access the electrical connections, proceed as follows:
- unscrew the lower cover fixing screw (C, fig. 3c)
- pull the cover towards you and remove (A-B) (fig. 4a)
- loosen the fixing screws (D) and remove the shell (fig. 3a)
- lift up the panel and turn it forwards
- open the terminal board covers making them slide in the direction
of the arrows (fig. 4b: Ehigh voltage connections 230 V, Flow
voltage connections, Gwater tank sensor connections only MIX
R.S.I.-R.A.I.).
Connect the appliance to the mains power supply with a switch
featuring a distance of at least 3,5 mm (EN 60335-1, category III)
between each wire.
The appliance uses alternating current at 230 Volt/50 Hz, has a
power input of 85 W (C.A.I.-R.A.I.), 120 W (26kW MIX C.S.I.), 150
W (30kW MIX C.S.I.-MIX R.S.I.) and 160 W (35kW MIX C.S.I.-MIX
R.S.I.) and complies with EN 60335-1 standard. Connect the boiler
to a safe earth circuit according to current legislation.
Live and neutral (L-N) connections should also be respected.
The boiler can operate with phase-neutral or phase-phase power
supply. For floating power supply, without an earth-bonded
conductor, it is necessary to use an insulation transformer with
secondary anchored to ground.
The earth conductor must be a couple of cm longer than
the others.
5.ELECTRIC CONNECTION
The central heating system can be filled up once the water mains
have been connected up.
This must be done while the installation is cold by:
• giving two or three turns to the cap of the automatic air vent
valve (A, fig. 5a and 5b) to open it;
• making sure the cold water inlet tap is open (MIX C.S.I. - C.A.I.
only)
• opening the filling tap (C, on the boiler for MIX C.S.I. - C.A.I.,
external for MIX R.S.I. - R.A.I.) until the pressure on the
hydrometer (D) is between 1 and 1,5 bar (blue zone) (fig. 5a and
5b).
Close the filling tap after filling it up.
The boiler is equipped with an efficient air separator so that there
is no need to do anything manually.
The burner only ignites when air venting has finished.
NOTE (MIX C.S.I. - C.A.I. only): even if the boiler is fitted with a
semi-automatic filling system, open tap Cto fill the circuit the first
time.
NOTE (MIX R.S.I. - R.A.I. only): manual filling tap is not supplied
with the boiler, foresee one external or verify if external water tank
has one.
Empty the system by:
• switching off the boiler
• connect the rubber hose, supplied standard, to the boiler drain
valve (E, fig. 5a and 5b)
• loosening the valve by hand (E)
• emptying out the lowest parts of the system.
DHW system emptying (MIX C.S.I. - C.A.I. only)
The hot water system must be emptied every time there is risk of
freezing by:
• turning off the tap at the mains
• turning on all the hot and cold taps
• emptying out the lowest parts of the system.
ATTENTION
The safety valve outlet (B) must be connected to a suitable
collection system.
The manufacturer shall not be held liable if the safety valve should
eventually cause flooding.
6.FILLING AND EMPTYINGTHE SYSTEM
Gas and/or water pipes may not be used to earth electrical
equipment.
The installer is responsible for making sure that the
appliance has an adequate earthing system; the
manufacturer shall not be held liable for eventual damages
caused by incorrect usage or failing to earth the boiler.
Use the supplied power cable to connect the boiler to the mains
power supply.
Connect the ambient thermostat and/or time clock as shown in the
electrical diagram on page 100.
When replacing the power cable, use a HAR H05V2V2-F cable,
3 x 0,75 mm2, Ø max. external 7 mm.

6
Refer to regulations in force for exhaustion of combustion products.
Boiler is provided for without fume exhaustion/air suction kit, since
forced draught sealed chamber accessories can be used, as they
better adapt to installation characteristics.
For fume extraction and burning air restoration in boiler, use origi-
nal pipes or other EC-certified pipes with equivalent characteris-
tics; check connection is correct as shown on instructions fume
accessories provided for with. More appliances can be connected to a
single chimney, provided that all appliances are sealed chamber type.
Boiler is a C-type appliance (sealed chamber) and must be safely
connected to fume exhaustion duct and burning air suction duct,
both getting outside; appliance cannot operate without these ducts.
Concentric outlets (ø 60-100)
Concentric ducts may be placed in the most suitable direction for
installation requirements but special care must be taken as regards
the external temperature and the length of the duct.
Consult the graphs to find out whether a condensate collector is
required.
8.FUMES EXHAUSTION AND BURNING
AIR SUCTION (MIX C.S.I.-MIX R.S.I.)
pressure drop
for each bend (m)
45° 90°
max. linear length
concentric duct ø 60-100 (m)
3,40
26 MIX C.S.I.
0,5 0,85
3,4030 MIX C.S.I.
3,4030 MIX R.S.I.
235 MIX C.S.I.
If the appliance works at temperatures lower than 50 °C (e.g.:
with external probe), the maximum permitted length must be
decreased by 1 metre.
The fumes outlet duct must slope by 1% towards the conden-
sate collector.
The condensate collector can only be applied to the fumes
outlet, within 0.85 m from the boiler; connect the trap of the
condensate collector to a waste water drain.
Uninsulated fumes outlets are potential hazards.
The boiler automatically adapts ventilation according to the type
of installation and the length of the duct. Do not obstruct or narrow
the comburent air inlet duct in any way.
EXHAUSTION CONFIGURATIONS (fig. 7)
Boiler is homologated for the following exhaustion configurations:
C12 Concentric wall exhaustion. Pipes can separately start from
boiler, but outlets must be concentric or close enough to be
subject to similar wind conditions (within 50 cm)
C22 Concentric exhaustion in common chimney (suction and
exhaustion in the same chimney)
C32 Concentric roof exhaustion. Outlets like C12
C42 Exhaustion and suction in common separate chimneys, but
subject to similar wind conditions
C52 Wall or roof separate exhaustion and suction in different
pressure areas. Exhaustion and suction must never be located
on opposite walls
C62 Exhaustion and suction with separately certified and sold
pipes (1856/1)
C82 Single or common chimney exhaustion and wall suction
Maximum length concentric ducts ø 60-100 26 MIX C.S.I.
EXHAUSTION LENGHT (m)
EXTERNAL TEMPERATURE (°C)
Maximum length concentric ducts ø 60-100
30 MIX C.S.I. - 30 MIX R.S.I.
Maximum length concentric ducts ø 60-100
35 MIX C.S.I. - 35 MIX R.S.I.
EXHAUSTION LENGHT (m)EXHAUSTION LENGHT (m)
EXTERNAL TEMPERATURE (°C)
EXTERNAL TEMPERATURE (°C)
Fig. 9
Concentric outlets (ø 80-125)
The boiler is furnished predisposed for connection to concentric
discharge/aspiration ducts and with the air aspiration aperture closed.
The concentric pipes may be oriented in the direction best suited
to the requirements of the premises, respecting the maximum
lengths indicated in the table below.
For installation, follow the instructions provided with the kit.
Execute a Ø 140 mm hole for transit through the wall.
Particular care is required with the external temperature and the
length of the pipe. Refer to the graphics to establish whether the
condensation trap is mandatory or not. In the case of operation at
water temperatures below 60 °C, the use of a condensation trap is
mandatory. In the case of use of condensation trap the fumes
discharge pipe must be inclined by 1% towards the trap.
Connect the condensation trap siphon to a white water outlet pipe.
Non insulated discharge pipes are potential sources of danger.
CONCENTRIC OUTLETS (ø 60-100)
Fig. 8a
Concentric
outlet
Clamp
Condensate
collector
Condensate
drain trap
pressure drop
for each bend (m)
45° 90°
length of ducts
vertical and horizontal (m)
7,626 MIX C.S.I.
1,35 2,2
7,630 MIX C.S.I.
7,630 MIX R.S.I.
4,235 MIX C.S.I.
35 MIX R.S.I. 2
35 MIX R.S.I. 4,2

7
English
Twin outlets (ø 80)
Twin ducts can be placed in the most suitable direction for
installation requirements but special care must be taken as regards
the temperature of the installation site and the length of the fumes
duct. To install, follow the instructions supplied with the kit.
In the event of installation with external discharge sections, to
calculate the maximum permitted length without a condensate
collector, refer to the external temperature instead of that of the
installation site of the boiler.
If the appliance works at temperatures lower than 50°C (e.g.:
installations with external probe), the maximum permitted
length without condensate collector must be decreased by
0.85 metres.
The condensate collector can only be applied to the fumes
outlet, within 0.85 m from the boiler; connect the trap of the
condensate collector to a waste water drain.
The fumes outlet duct must slope by 1% towards the conden-
sate collector.
The boiler automatically adapts ventilation according to the
type of installation and the length of the ducts. Do not obstruct
or narrow the ducts in any way.
If the length of the ducts is different from that indicated in the
table to the side:
- for model 26 MIX C.S.I., the sum of the lengths of the inlet
and outlet ducts must be less than 30 metres, but the
length of a single duct must not exceed 18 metres
- for models 30 MIX C.S.I. - MIX R.S.I., the sum of the lengths
of the inlet and outlet ducts must be less than 28 metres,
but the length of a single duct must not exceed 17 metres
- for model 35 MIX C.S.I. - MIX R.S.I., the sum of the lengths
of the inlet and outlet ducts must be less than 12 metres,
but the length of a single duct must not exceed 8 metres.
max. length
twin duct (ø 80) (m)
15 + 1526 MIX C.S.I.
14 + 1430 MIX C.S.I.
14 + 1430 MIX R.S.I.
6 + 635 MIX C.S.I.
pressure drop
for each bend (m)
45° 90°
0,85
0,5
Maximum length twin ducts ø 80 26 MIX C.S.I.
EXHAUSTION LENGHT (m)
EXTERNAL TEMPERATURE (°C)
EXHAUSTION LENGHT (m)
EXTERNAL TEMPERATURE (°C)
Maximum length twin ducts ø 80
30 MIX C.S.I. - 30 MIX R.S.I.
EXHAUSTION LENGHT (m)
EXTERNAL TEMPERATURE (°C)
Maximum length twin ducts ø 80
35 MIX C.S.I. - 35 MIX R.S.I.
Fig. 10
0,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
4,5
5,0
5,5
6,0
6,5
7,0
7,5
8,0
8,5
9,0
9,5
10,0
-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30
0,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
4,5
5,0
5,5
6,0
6,5
7,0
7,5
8,0
8,5
9,0
9,5
10,0
-30-25-20-15-10-5 0 5 1015202530
EXHAUSTION LENGHT (m)
EXTERNAL TEMPERATURE (°C)
EXHAUSTION LENGHT (m)
EXTERNAL TEMPERATURE (°C)
26 - 30kW
35kW
TWIN OUTLETS (ø 80)
Condensate
collector
Condensate
collector
Condensate
drain trap
Condensate
drain trap
Air intake
duct
Air intake
duct Fumes
outlet duct
Fumes
outlet duct
Fig. 8b
CONDENSATE COLLECTOR
COMPULSORY
CONDENSATE COLLECTOR
NOT COMPULSORY
CONDENSATE COLLECTOR
COMPULSORY
CONDENSATE COLLECTOR
NOT COMPULSORY
35 MIX R.S.I. 6 + 6

8
99
99
9..
..
.TECHNICAL DATA
CH/DHW* nominal heating capacity (Hi) kW 26,70 31,30 28,80 33,20 37,80
kcal/h 22.962 26.918 24.768 28.552 32.508
CH/DHW* nominal heating power kW 24,03 28,30 26,21 30,38 35,31
kcal/h 20.666 24.334 22.539 26.125 30.362
CH reduced heating capacity (Hi) kW 8,30 10,70 8,50 9,80 9,95
kcal/h 7.138 9.202 7.310 8.428 8.557
CH reduced heating power kW 7,05 9,21 7,70 8,86 9,18
kcal/h 6.060 7.923 6.623 7.619 7.898
DHW* reduced heating capacity (Hi) kW 8,30 8,70 8,50 9,80 9,95
kcal/h 7.138 7.482 7.310 8.428 8.557
DHW* reduced heating power kW 7,05 7,49 7,70 8,86 9,18
kcal/h 6.060 6.442 6.623 7.619 7.898
Working efficiency Pn max - Pn min % 90,0-84,9 90,4-86,1 91,0-90,6 91,5-90,4 93,4-92,3
Working efficiency 30% % 89,9 90,3 91,9 92,2 94,5
Electric power W 85 85 120 150 160
Supply voltage V - Hz 230-50 230-50 230-50 230-50 230-50
Protection level IP X5D X5D X5D X5D X5D
Chimney and skirt losses with burner off % 0,07-0,80 0,07-0,80 0,80-0,07 0,80-0,07 0,80-0,07
CH operation
Maximum pressure - temperature bar-°C 3-90 3-90 3-90 3-90 3-90
Minimum pressure for standard working/operating bar 0,25-0,45 0,25-0,45 0,25-0,45 0,25-0,45 0,25-0,45
Selection field of CH water temperature °C 40-80 40-80 40-80 40-80 40-80
Pump: maximum head available for system mbar 300 300 300 300 340
capacity l/h 1000 1000 1000 1000 1000
Membrane expansion tank l 8 8 8 8 10
Expansion vessel pre-charge (CH) bar 1 1 1 1 1
DHW operation*
Maximum pressure bar 6 6 6 6 6
Minimum pressure bar 0,15 0,15 0,15 0,15 0,15
Specific capacity following EN625 l/min - - 11,85 14 -
Hot water quantity: Δt 30° C l/min 11,5 13,5 - - 16,9
DHW minimum capacity l/min 2 2 2 2 2
Selection field of DHW temperature °C 35-60 35-60 35-60 35-60 35-60
Flow regulator l/min 10 12 11 13 15
Gas pressure
Category (extra EC countries) II2H3+ II2H3+ II2H3+ II2H3+ II2H3+
Natural gas pressure (G20) mbar 20 20 20 20 20
LPG pressure (G30/G31) mbar 28-30/37 28-30/37 28-30/37 28-30/37 28-30/37
Category (MT) I3B/P I3B/P I3B/P I3B/P I3B/P
LPG pressure (G30/G31) mbar 30 30 30 30 30
Hydraulic connections
CH input-output Ø 3/4” 3/4” 3/4” 3/4” 3/4”
DHW input-output (MIX C.S.I. - C.A.I.) Ø 1/2” 1/2” 1/2” 1/2” 1/2”
Water tank delivery-return (MIX R.S.I. - R.A.I.) Ø - 3/4” - 3/4” 3/4”
Gas input Ø 3/4” 3/4” 3/4” 3/4” 3/4”
Boiler dimensions and weight
Height mm 740 740 740 740 780
Width mm 400 450 400 450 500
Depth mm 332 332 332 332 332
Weight kg 30 33 (C.A.I.) 34 36 (MIX C.S.I.) 43 (MIX C.S.I.)
Weight kg - 32 (R.A.I.) - 35 (MIX R.S.I.) 41 (MIX R.S.I.)
Fan performance
Residual head with 0.85m concentric pipes mbar - - 0,2 0,2 0,2
Residual head of boiler without pipes mbar - - 0,35 0,35 1,15
Flow rates (G20)
Air capacity Nm3/h 46,914 54,996 48,34 54,107 60,724
Fumes capacity Nm3/h 49,591 58,135 51,23 57,44 64,515
Mass flow (max-min) gr/s 16,92-15,01 19,84-17,98 17,45-10,24 19,54-13,64 21,93-13,17
Fume exhaustion pipe
Diameter mm 130 140 - - -
Fume exhaustion and air suction concentric pipe
Diameter mm - - 60-100 60-100 60-100
Max lenght m - - 3,40 3,40 2,00
Loss for a 90°/45° bend m - - 0,85/0,5 0,85/0,5 0,85/0,5
Hole in wall (diameter) mm - - 105 105 105
Diameter mm - - 80-125 80-125 80-125
Max lenght m - - 7,6 7,6 4,2
Loss for a 90°/45° bend m - - 2,2/1,35 2,2/1,35 2,2/1,35
Hole in wall (diameter) mm - - 140 140 140
Fume exhaustion and air suction separated pipe
Diameter mm - - 80 80 80
Max lenght m - - 15+15 14+14 6+6
Loss for a 90°/45° bend m - - 0,8/0,5 0,8/0,5 0,8/0,5
NOx 3 class 2 class 2 class 3 class 3 class
Emission values at maximum and minimum of gas G20 **
Maximum CO s.a. lower than p.p.m. 100 130 100 90 90
CO2% 6,40 6,40 6,70 6,90 7,00
NOx s.a. lower than p.p.m. 160 210 190 140 120
Δt fumes °C 113 106 133 132 116
Minimum CO s.a. lower than p.p.m. 130 90 120 100 120
CO2% 2,23 2,40 3,35 2,90 3,05
NOx s.a. lower than p.p.m. 100 150 140 110 100
Δt fumes °C 71 70 63 72 62
*DHW values refer to MIX C.S.I. - C.A.I. models.
** C.A.I. - R.A.I.: tested with Ø130 (24kW), Ø140 (28kW) - lenght 0,5m.
** MIX C.S.I. - MIX R.S.I.: tested with Ø60-100 concentric - lenght 0,85m - water temperature 80-60°C.
C.A.I.
24kW
C.A.I.
R.A.I.
28kW
MIX C.S.I.
26kW
MIX C.S.I.
MIX R.S.I.
30kW
MIX C.S.I.
MIX R.S.I.
35kW

9
English
10.MULTIGASTABLE
Parameters Methane Liquid gas
(G20) Butane Propane
(G30) (G31)
C.A.I. - R.A.I.
Lower Wobbe index (15°C-1013 mbar) MJ/m3S 45,67 80,58 70,69
Lower heat value MJ/m3S 34,02 116,09 88
MJ/kgs - 45,65 46,34
Supply nominal pressure (Extra EC countries) mbar 20 28-30 37
(mm H2O) (203,9) (285,5-305,9) (377,3)
Supply nominal pressure (MT) mbar 30
(mm H2O) (305,9)
Supply minimum pressure mbar 13,5
(mm H2O) (137,7) -
24 kW C.A.I.
Main burner (12 nozzles) Ø mm 1,3 0,77 0,77
CH maximum gas capacity Sm3/h 2,82 - -
kg/h - 2,10 2,07
DHW maximum gas capacity Sm3/h 2,82 - -
kg/h - 2,10 2,07
CH minimum gas capacity Sm3/h 0,88 - -
kg/h - 0,65 0,64
DHW minimum gas capacity Sm3/h 0,88 - -
kg/h - 0,65 0,64
Maximum pressure downstrean CH valve mbar 11,80 28,00 36,00
mm H2O 120,33 285,52 367,10
Maximum pressure downstrean DHW valve mbar 11,80 28,00 36,00
mm H2O 120,33 285,52 367,10
Minimum pressure downstrean CH valve mbar 1,30 3,10 4,00
mm H2O 13,26 31,61 40,79
Minimum pressure downstrean DHW valve mbar 1,30 3,10 4,00
mm H2O 13,26 31,61 40,79
28 kW C.A.I. - R.A.I.
Main burner (14 nozzles) Ø mm 1,3 0,77 0,77
CH maximum gas capacity Sm3/h 3,31 - -
kg/h - 2,47 2,43
DHW maximum gas capacity* Sm3/h 3,31 - -
kg/h - 2,47 2,43
CH minimum gas capacity Sm3/h 1,13 - -
kg/h - 0,84 0,83
DHW minimum gas capacity* Sm3/h 0,92 - -
kg/h - 0,69 0,68
Maximum pressure downstrean CH valve mbar 11,90 28,00 35,80
mm H2O 121,35 285,52 365,06
Maximum pressure downstrean DHW valve* mbar 11,90 28,00 35,80
mm H2O 121,35 285,52 365,06
Minimum pressure downstrean CH valve mbar 1,50 3,80 5,30
mm H2O 15,30 38,75 54,05
Minimum pressure downstrean DHW valve* mbar 1,10 2,50 3,30
mm H2O 11,22 25,49 33,65
*DHW values refer to MIX C.S.I. - C.A.I. models.

10
Parameters Methane Liquid gas
(G20) Butane Propane
(G30) (G31)
MIX C.S.I. - MIX R.S.I.
Lower Wobbe index (15°C-1013 mbar) MJ/m3S 45,67 80,58 70,69
Lower heat value MJ/m3S 34,02 116,09 88
MJ/kgs - 45,65 46,34
Supply nominal pressure (Extra EC countries) mbar 20 28-30 37
(mm H2O) (203,9) (285,5-305,9) (377,3)
Supply nominal pressure (MT) mbar 30
(mm H2O) (305,9)
Supply minimum pressure mbar 13,5
(mm H2O) (137,7) -
26 kW MIX C.S.I.
Main burner (13 nozzles) Ø mm 1,35 0,78 0,78
CH maximum gas capacity Sm3/h 3,05 - -
kg/h - 2,27 2,24
DHW maximum gas capacity Sm3/h 3,05 - -
kg/h - 2,27 2,24
CH minimum gas capacity Sm3/h 0,90 - -
kg/h - 0,67 0,66
DHW minimum gas capacity Sm3/h 0,90 - -
kg/h - 0,67 0,66
Maximum pressure downstrean CH valve mbar 10,60 27,90 35,50
mm H2O 108,09 284,50 362,00
Maximum pressure downstrean DHW valve mbar 10,60 27,90 35,50
mm H2O 108,09 284,50 362,00
Minimum pressure downstrean CH valve mbar 1,10 2,60 3,60
mm H2O 11,22 26,51 36,71
Minimum pressure downstrean DHW valve mbar 1,10 2,60 3,60
mm H2O 11,22 26,51 36,71
30 kW MIX C.S.I. - MIX R.S.I.
Main burner (15 nozzles) Ø mm 1,35 0,76 0,76
CH maximum gas capacity Sm3/h 3,51 - -
kg/h - 2,62 2,58
DHW maximum gas capacity* Sm3/h 3,51 - -
kg/h - 2,62 2,58
CH minimum gas capacity Sm3/h 1,04 - -
kg/h - 0,77 0,76
DHW minimum gas capacity* Sm3/h 1,04 - -
kg/h - 0,77 0,76
Maximum pressure downstrean CH valve mbar 10,10 27,50 35,40
mm H2O 102,99 280,42 360,98
Maximum pressure downstrean DHW valve* mbar 10,10 27,50 35,40
mm H2O 102,99 280,42 360,98
Minimum pressure downstrean CH valve mbar 1,00 2,80 3,60
mm H2O 10,20 28,55 36,71
Minimum pressure downstrean DHW valve* mbar 1,00 2,80 3,60
mm H2O 10,20 28,55 36,71
35 kW MIX C.S.I. - MIX R.S.I.
Main burner (16 nozzles) Ø mm 1,4 0,8 0,8
CH maximum gas capacity Sm3/h 4,00 - -
kg/h - 2,98 2,94
DHW maximum gas capacity Sm3/h 4,00 - -
kg/h - 2,98 2,94
CH minimum gas capacity Sm3/h 1,05 - -
kg/h - 0,78 0,77
DHW minimum gas capacity Sm3/h 1,05 - -
kg/h - 0,78 0,77
Maximum pressure downstrean CH valve mbar 9,60 27,30 35,40
mm H2O 97,89 278,38 360,98
Maximum pressure downstrean DHW valve mbar 9,60 27,30 35,40
mm H2O 97,89 278,38 360,98
Minimum pressure downstrean CH valve mbar 0,70 2,10 2,80
mm H2O 7,14 21,41 28,55
Minimum pressure downstrean DHW valve mbar 0,70 2,10 2,80
mm H2O 7,14 21,41 28,55
*DHW values refer to MIX C.S.I. - C.A.I. models.

11
English
11.START-UP AND OPERATION
(C.A.I. - MIX C.S.I.)
Description of commands
Heating water temperature selector: sets the heating water
temperature.
Domestic hot water temperature selector: sets the domestic
hot water temperature.
Function key:
- ON the boiler is electrically powered and waiting for
operating requests ( - )
- OFF the boiler is electrically powered but will not respond
to operating requests
- RESETresets the boiler following a fault
Operating mode button: allows the most suitable operating
mode to be selected ( winter - winter comfort- summer
- summer comfort).
Info button: shows a sequence of information concerning the
operating status of the machine.
Filling button: pushing it, the boiler automatically fills the system
until the pressure reaches 1 to 1.5 bar.
The boiler produces heating and domestic hot water.
The control panel (fig. 13) contains the main boiler control and
management functions.
Fig. 13
Description of display symbols
graduated heating water temperature scale with heating
function symbol
graduated domestic hot water temperature scale with
domestic hot water function symbol
fault symbol (for details, please see page 15)
reset symbol (for details, please see page 15)
pressure value
external sensor connection
heating/domestic hot water temperature
or
fault symbol (e.g. 10 - no flame)
function selector (turned to the chosen operating mode:
winter - winter comfort- summer - summer
comfort)
burner operating symbol
anti-freeze function active symbol
system filling function symbol
fill symbol
Fig. 14
Domestic
hot water
temperature
selector
Operating
mode button
ON-OFF-RESET
function selector
Filling
button
Heating water
circuit temperature
selector
INFO
button

12
Adjusting heating water temperature
Turning the selector A(fig. 18), after having positioned the selector
mode on winter or winter comfort , it is possible to regulate
the heating water temperature.
Turn clockwise to increase the temperature and anticlockwise to
decrease. The bar segments light up (every 5°C) as the tempera-
ture is increased. The selected temperature value appears on the
display.If you enter the S.A.R.A.adjustment field (from 55 to 65 °C)
while selecting the heating water temperature, the symbol and
the graduated scale start flashing. For details about the S.A.R.A.
function, read page 14. The selected temperature value appears
on the display.
Adjusting heating water temperature with an external sensor
connected
When an external probe is connected, the value of the delivery
temperature is automatically chosen by the system which rapidly
adjusts ambient temperature to the changes in external tempera-
ture. Just the central segment of the bar is illuminated (fig. 19).
To increase or decrease the temperature with respect to the value
automatically calculated by the electronic board, turn the heating
water selector clockwise to increase and anticlockwise to decrease.
The bar segments light up (at every comfort level), correction
tolerance lies between - 5 and + 5 comfort levels (fig. 19). When
choosing the level of comfort, the digit area of the display shows
the required level of comfort while the bar shows the matching
segment (fig. 20).
Adjusting domestic hot water temperature
To adjust domestic hot water temperature, turn switch B(fig. 21)
clockwise to increase and anticlockwise to decrease. The bar
segments light up (every 3°C) as the temperature is increased.
The selected temperature value appears on the display.
When choosing the temperature, both for heating and domestic
hot water, the display shows the value being selected. About 4
seconds after the selection has been made, the modification is
memorised and the display returns to the delivery temperature
read by the probe.
Switching on
Switch on the boiler as follows:
- access the gas tap through the slots in the cover located in the
lower part of the boiler
- open the gas tap by turning it anti-clockwise (fig. 15)
- power the boiler.
When powered, the boiler performs a test sequence and a series
of numbers and letters are shown on the display.
If the test is successful the boiler is ready to work about 4 seconds
after the cycle ends.
The display will look like fig. 16.
If the test is unsuccessful, the boiler will not work and a “0” will
flash on the display.
In this case, contact the Technical Assistance Centre.
The boiler turns on in the status it was in before it was switched
off: if the boiler was in the winter comfort mode when it was
switched off, it will turn on again in the winter comfort mode. If it
was in the OFF mode, the display will show two segments in the
central area (fig. 17). Press the button to enable operation.
- press the function selector until the indicator moves to the required
function , depending on the kind of operation chosen.
- WINTER : with the selector in this position, the heating water
and domestic hot water functions are activated.
In this position the S.A.R.A. function is enabled in the heating
mode (see chapter “Boiler functions”). The boiler actives the
temperature stabiliser in order to ensure the continuous
production of domestic hot water, even for small demands or
when the inlet water is already hot. This prevents temperature
oscillations due to the burner switching off/on.
- WINTER COMFORT : with the selector in this position, as
well as the traditional function of heating water and domestic
hot water, the preheating function is also activated which keeps
the water in the domestic hot water exchanger hot in order to
reduce waiting times. The S.A.R.A. Booster and Domestic hot
water preheating functions are enabled in this position (see
chapter “Boiler functions”).
- SUMMER :with the selector in this position, just the traditional
domestic hot water function is activated.
- SUMMER COMFORT : with the selector in this position, the
boiler provides just domestic hot water with a temperature
stabiliser for small deliveries. Ideal at the times of year or in the
areas where the mains water is already warm. In these conditions,
the temperature of the hot water produced by a boiler with just
traditional functions (see SUMMER and WINTER COMFORT)
may be instable.
Fig. 15
open
position
Fig. 16
Fig. 17
Fig. 18
Fig. 21
A
Fig. 19
°C
+ 4/5
+ 3
+ 2
+ 1
0
- 1
- 2
- 3
- 4/5
Fig. 20
B

13
English
If this condition occurs it means that the system is incorrectly
pressurised though the boiler will continue to work regularly.
Press the circuit filling button to start-up the filling sequence.
Press the circuit filling button a second time to interrupt the
filling sequence. During filling, the drops of the circuit filling
symbol and the growing pressure value appear on the
display in a cascade sequence (fig. 27).
After filling, the symbol is displayed for a few moments and then
turns off.
Note
During filling, the boiler does not perform other functions. For
example, if there is a request for domestic hot water, the boiler is
unable to provide it until filling has finished.
Note
If circuit pressure reaches 0.6 bar, the pressure value flashes on
the display (fig. 28b); if it falls below a minimum safety value (0.3
bar), fault code 41 appears on the display (fig. 28a) for a certain
time, following which, if the fault persists, fault code 40 is displayed
(see chapter on “Troubleshooting”).
In the event of fault 40, press to reset and then to start filling
the circuit. If you have to fill the system several times, contact the
Technical Service Centre to check whether the heating circuit is
watertight (see if there are any leaks).
Information
Press , the display turns off and just the word InFO appears (fig.
29). Press the button to view operating information. Press the
button again to move on to the next piece of information. If the
button is not pressed, the system automatically exits the function.
Info list:
Info 0 shows the word InFO (fig. 29)
Info 1 only with the external probe connected, displays external
temperature (e.g. 12 °C) (fig. 30).
The values shown on the display range between - 40 °C
and 40 °C.
Beyond these values the display shows “- -”
Fig. 27
Working the boiler
Adjust the ambient thermostat to the required temperature (approx.
20 °C). If there is a demand for heating water, the boiler starts
and the symbol is shown on the display (fig. 22). The boiler will
remain working until the set temperatures are reached, after which
it will go on stand-by. In the event of ignition or operating faults,
the boiler will perform a “safety stop”.
The flame symbol will go out and the fault code and will
be displayed (fig. 23). For a description of faults and how to reset
them, consult chapter “Troubleshooting”.
Switching off
Switching off for short periods
For brief absences press the button to switch off the boiler. The
display will show two segments in the central area (fig. 17). When
the boiler remains powered with the gas tap open, it is protected
by the following systems:
- anti-freeze (fig. 24): when the temperature of the water in the
boiler falls below safety values, the circulator and the burner
work at minimum power to increase the water temperature to a
safe value (35 °C). The symbol lights up on the display.
- circulator anti-block: one operating cycle is performed every
24 hours.
Switching off for long periods
For prolonged absences press the button to switch off the boiler
(fig. 17). The display will show two segments in the central area.
Turn the main switch to “off”.
Turn off the gas tap under the boiler by turning it clockwise (fig. 25).
In this case, the anti-freeze and anti-block systems are disabled.
Empty the water circuit or suitably protect it with a good make
of anti-freeze. Drain the domestic hot water circuit.
Fig. 23
Fig. 22
Fig. 24
Fig. 25
tap
closed
Boiler functions
Semi-automatic filling
The boiler features a semi-automatic filling device which turns on
by pressing the button when the corresponding symbol is
shown on the display (fig. 26).
Fig. 26
Fig. 29
Fig. 28a
Fig. 28b
Fig. 30

14
Fig. 34
Fig. 35
Info 2 shows circuit pressure (fig. 31)
Info 3 shows the set heating temperature (fig. 32)
Info 4 shows the set domestic hot water temperature (fig. 33).
S.A.R.A. function
If the “winter” mode is selected, the S.A.R.A. (Automatic Ambient
Adjustment System) function can be activated.
Turn the heating water temperature selector to a temperature
ranging between 55 and 65 °C.
The S.A.R.A. self-adjustment system activates: depending on the
temperature set on the ambient thermostat and the time taken to
reach it, the boiler automatically adjusts the heating water tem-
perature to reduce operating times, thereby increasing operating
comfort and energy saving.
Fig. 31
Fig. 32
Fig. 33
S.A.R.A. BOOSTER function
If the “winter comfort” mode is selected, the S.A.R.A. Booster
function is activated for the heating circuit and reaches the required
ambient temperature more quickly.
DOMESTIC HOTWATER PRE-HEATING function
If the “winter comfort” mode is selected, the domestic hot water
Preheating function is enabled. This function sets out to keep the
domestic hot water contained in the boiler hot, thereby considerably
reducing delivery waiting times.
The function should be selected to reduce power consumption
in areas where the mains water is not particularly cold.
In this case, the Booster and Preheating functions are not activated.
Troubleshooting
When a fault appears on the display, the flame symbol goes out,
a flashing code is shown and the two symbols and
appear either together or separately.
For a description of the faults, consult the following table .
(D) Permanent
(T) Temporary. In this operating status the boiler attempts to eliminate the fault on its own
(°) See NOTE in the next page.
(*) For the “insufficient circuit pressure” fault, proceed with the circuit filling operations described in the “Boiler functions” chapter.
FAULT Alarm Symbol Symbol
ID
FLAME FAILURE BLOCK (D) 10 YES NO
LIMIT THERMOSTAT (D) 20 YES NO
BURNER THERMOSTAT (D) (MIX C.S.I) 21 YES NO
FUMES THERMOSTAT (D) (C.A.I.) 22 YES YES
FUMES OUTLET OR AIR PRESSOSTAT (D) (MIX C.S.I.) 30 YES NO
FUMES OUTLET OR AIR PRESSOSTAT (T) (MIX C.S.I.) 31 NO YES
INSUFFICIENT SYSTEM PRESSURE (D*) 40 YES NO
INSUFFICIENT SYSTEM PRESSURE (T*) 41 NO YES
WATER PRESSURE TRANSDUCER (D) 42 YES YES
FALSE FLAME (D) 50 YES YES
ELECTRONIC BOARD (D) 51-59 YES YES
SANITARY PROBE 1 (T°) 60 NO YES
PRIMARY PROBE (T) 71 NO YES
LOW TEMPERATURE THERMOSTAT (T) 77 YES YES

15
English
Resettingfaults
Wait for about 10 seconds before resetting operating conditions.
Then proceed as follows:
1) Viewing just the symbol
If disappears, it means that an operating fault has been
discovered which the boiler is attempting to solve on its own
(temporary stoppage). If the boiler does not resume normal
operation, two things may happen:
case A (fig. 36)
disappears, the symbol and a different alarm code
appear. In this case, proceed as described in point 2.
case B (fig. 37)
and a different alarm code are displayed together with .
In this case, proceed as described in point 3.
2) Viewing just the symbol (fig. 38)
Press the button to reset the appliance. If the boiler starts the
ignition phase and resumes normal operation, it may have
stopped by accident.
If these stoppages should continue, contact the Technical
Assistance Centre.
3) Viewing the and symbols (fig. 39)
Contact the Technical Assistance Centre.
Note
Fault in domestic hot water circuit sensor - 60: the boiler works
regularly but does not ensure the stability of the hot water tempe-
rature which, however, is delivered at a temperature of
approximately 50°C. The fault code is only displayed in standby.
12.PROGRAMMING PARAMETERS
This boiler incorporates a new generation of electronic boards that, by
setting/modifying operating parameters, allow the boiler to be
personalised to satisfy various system and/or user requirements. The
programmable parameters are shown in the table on the next page.
The parameters must be programmed with the boiler in the
OFF position. To do this, press the button until the display
shows “- -” (fig. 40).
During parameter modification operations, the “select
functions” button acts as an ENTER (confirm) button, the
button acts as an ESCAPE (escape) button. If no confirmation
is given within 10 seconds, the value is discarded and returns
to the previously set one.
Setting the password
Press and hold down the select functions button and the button
together for about 10 seconds. The display will look like fig. 41.
Enter the password for accessing the parameter modifications
function by turning the domestic hot water temperature selector to
obtain the required value. The password for accessing the
parameter programming function is located on the back side of
the control panel. Confirm by pressing ENTER.
Modifying parameters
Turn the domestic hot water temperature selector (fig. 42) to
sequentially scroll the two-figure codes of the parameters indicated
in the table. After identifying the parameter you wish to modify,
proceed as follows:
- press ENTER to access the parameter modification function. When
ENTER is pressed, the previously set value starts flashing (fig. 43)
- turn the domestic hot water temperature selector to change the value
- press ENTER to confirm the new value. The digits stop flashing
(fig. 44)
- press ESCAPE to exit.
The boiler returns to the “- -” (OFF) status.
To reset, press the button (fig. 40).
Fig. 36
Fig. 37
Fig. 38
“temporary
fault”
Fig. 39
Fig. 40
Fig. 41
Fig. 42
Fig. 43
Fig. 44
“temporary
fault”
“permanent
fault”
“permanent
fault”
ENTER ESCAPE
parameter
value parameter
number

16
CC
CC
C.A.A
.A.A
.A.I.I
.I.I
.I.:.:
.:.:
.: prpr
prpr
progog
ogog
ogrr
rr
raa
aa
ammabmmab
mmabmmab
mmable parle par
le parle par
le paraa
aa
ametersmeters
metersmeters
meters
N° DESCRIPTION PARAMETERS UNIT OF MIN MAX DEFAULT PARAMETERS
PAR. MEASURE (setted in factory) (setted by techn. assist. centre)
1 GAS TYPE 1 Methane 1-2
2 LPG
3 Methane France
3 INSULATION LEVEL OF BUILDING (+) (*) min 5 20 5
10 DHW MODE 0 (OFF) 1
1 (Instantaneous)
2 (Mini-tank)
3 (External water-tank with thermostat)
4 (External water-tank with sensor)
11 DHW CIRCUIT MAXIMUM SET-POINT ° C 40 60 60
12 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 60
13 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 80
14 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 5
20 CH MODE 0 (OFF) 1
1 (ON)
2 (zone valves + remote control panel)
21 HEATING CIRCUIT MAXIMUM SET-POINT ° C 40 80 80
22 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 40
28 MAX HEATING POWER REDUCTIONTIMER min 0 20 15
29 FORCED HEATING SHUT DOWNTIMER min 0 20 3
30 HEATINGTIMER RESET FUNCTION - 0 1 0
40 DHW THERMOSTAT OPERATING MODE 0 (OFF) 1
1 (AUTO)
2 (ON)
41 DHW PREHEATING FUNCTION 0 (OFF) 1
1 (AUTO)
2 (ON)
42 S.A.R.A. FUNCTION 0 (OFF) 1
1 (AUTO)
43 S.A.R.A. BOOSTER FUNCTION 0 (OFF) 1
1 (AUTO)
44 THERMOREGULATION FUNCTION 0 (OFF) 1
1 (AUTO)
45 INCLINATIONTHERMOREGULATION CURVE (OTC) (*) - 2,5 40 20
48 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 0
50 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 1
61 DHW ANTIFREEZEFUNCTIONTEMPERATURE (ON) °C 0 10 4
62 HEATING ANTIFREEZE FUNC.DELIVERYTEMP. (ON) °C 0 10 6
85 SEMI-AUTOMATIC FILLING 0 (disabled)/1 (enabled) 1
86 AUTOMATIC FILLING PRESSURE (ON) bar 0.4 0.8 0.6
MIX CMIX C
MIX CMIX C
MIX C.S.S
.S.S
.S.I.I
.I.I
.I.:.:
.:.:
.: prpr
prpr
progog
ogog
ogrr
rr
raa
aa
ammabmmab
mmabmmab
mmable parle par
le parle par
le paraa
aa
ametersmeters
metersmeters
meters
N° DESCRIPTION PARAMETERS UNIT OF MIN MAX DEFAULT PARAMETERS
PAR. MEASURE (setted in factory) (setted by techn. assist. centre)
1 GAS TYPE 1 Methane 1-2
2 LPG
3 Methane France
2 BOILER POWER 26 (26kW) 26-30-34
30 (30kW)
34 (35kW)
3 INSULATION LEVEL OF BUILDING (+) (*) min 5 20 5
10 DHW MODE 0 (OFF) 1
1 (Instantaneous)
2 (Mini-tank)
3 (External water-tank with thermostat)
4 (External water-tank with sensor)
11 DHW CIRCUIT MAXIMUM SET-POINT ° C 40 60 60
12 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 60
13 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 80
14 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 5
20 CH MODE 0 (OFF) 1
1 (ON)
2 (zone valves + remote control panel)
21 HEATING CIRCUIT MAXIMUM SET-POINT ° C 40 80 80
22 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 40
28 MAX HEATING POWER REDUCTIONTIMER min 0 20 15
29 FORCED HEATING SHUT DOWNTIMER min 0 20 3
30 HEATINGTIMER RESET FUNCTION - 0 1 0
40 DHW THERMOSTAT OPERATING MODE 0 (OFF) 1
1 (AUTO)
2 (ON)
41 DHW PREHEATING FUNCTION 0 (OFF) 1
1 (AUTO)
2 (ON)
42 S.A.R.A. FUNCTION 0 (OFF) 1
1 (AUTO)
43 S.A.R.A. BOOSTER FUNCTION 0 (OFF) 1
1 (AUTO)
44 THERMOREGULATION FUNCTION 0 (OFF) 1
1 (AUTO)
45 INCLINATIONTHERMOREGULATION CURVE (OTC) (*) - 2,5 40 20
48 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 0
50 THIS PARAMETER IS NOT USED ONTHIS MODEL. DO NOT MODIFY 1
61 DHW ANTIFREEZEFUNCTIONTEMPERATURE (ON) °C 0 10 4
62 HEATING ANTIFREEZE FUNC.DELIVERYTEMP. (ON) °C 0 10 6
85 SEMI-AUTOMATIC FILLING 0 (disabled)/1 (enabled) 1
86 AUTOMATIC FILLING PRESSURE (ON) bar 0.4 0.8 0.6
(*) parameters shown only with external sensor connected and parameter 44 in 1 (AUTO).
(+) for well-insulated buildings select values close to 20, for badly insulated buildings choose values close to 5.
T m. = maximum rated temperature of heating water
T e. = minimum rated external temperature
OTC = 10 x Tm. - 20
20 - Te.
Parameter 45 “Inclination of thermoregulation curve (OTC)”
The curve must be chosen according to the geographical area and the type
of installation.

17
English
Description of commands
Heating water temperature selector: sets the heating water
temperature.
Domestic hot water temperature selector (C case only): sets
the domestic hot water temperature storaged in the water tank.
Setting parameters selector (cases A, B and C): using in
calibration and programmation phase.
Function key:
- ON the boiler is electrically powered and waiting for
operating requests ( - )
- OFF the boiler is electrically powered but will not respond
to operating requests
- RESETresets the boiler following a fault
Operating mode button: button allows to choose the
desired operating mode: pressing it, the indicator “function
selector” moves to: (winter) or (summer, only if
water-tank connected).
Info button: shows a sequence of information concerning the
operating status of the machine.
Fig. 45
Description of display symbols
graduated heating water temperature scale with heating
function symbol
graduated domestic hot water temperature scale (shown
in C case only)
domestic hot water function symbol (shown in B and C
cases)
fault symbol (for details, please see page 21)
reset symbol (for details, please see page 21)
pressure value
external sensor connection
heating/domestic hot water temperature (shown in C case
only)
or
fault symbol (e.g. 10 - no flame)
function selector (turned to the chosen operating mode:
winter or summer (only if water-tank connected)
burner operating symbol
anti-freeze function active symbol
Fig. 46
13.START-UP AND OPERATION
(R.A.I. - MIX R.S.I.)
This boiler is able to operate in different conditions:
CASE A) only heating
CASE B) only heating with external water tank connected,
managed by a thermostat, to prepare domestic hot
water
CASE C) only heating with external water tank connected,
managed by a temperature sensor (kit available
upon request), to prepare domestic hot water.
Depending on the type of installation selected, it is necessary
to set the parameter “domestic hot water mode”.This operation
must be performed by a Technical Service Centre when
starting-up the boiler.
Domestic hot water
temperature selector
(C case only)
Operating
mode button
ON-OFF-RESET
function selector
INFO
button
Heating water
circuit temperature
selector
Setting
parameters
selector

18
Adjusting heating water temperature
Turning the selector A(fig. 52), after having positioned the selector
mode on winter , it is possible to regulate the heating water
temperature.
Turn clockwise to increase the temperature and anticlockwise to
decrease. The bar segments light up (every 5°C) as the tempera-
ture is increased. The selected temperature value appears on the
display.
Adjusting heating water temperature with an external sensor
connected
When an external probe is connected, the value of the delivery
temperature is automatically chosen by the system which rapidly
adjusts ambient temperature to the changes in external tempera-
ture. Just the central segment of the bar is illuminated (fig. 53).
To increase or decrease the temperature with respect to the value
automatically calculated by the electronic board, turn the heating
water selector clockwise to increase and anticlockwise to decrease.
The bar segments light up (at every comfort level), correction
tolerance lies between - 5 and + 5 comfort levels (fig. 53). When
choosing the level of comfort, the digit area of the display shows
the required level of comfort while the bar shows the matching
segment (fig. 54).
Switching on
Switch on the boiler as follows:
- access the gas tap through the slots in the cover located in the
lower part of the boiler
- open the gas tap by turning it anti-clockwise (fig. 47)
- power the boiler.
When powered, the boiler performs a test sequence and a series
of numbers and letters are shown on the display.
If the test is successful the boiler is ready to work about 4 seconds
after the cycle ends.
The display will look like fig. 48.
If the test is unsuccessful, the boiler will not work and a “0” will
flash on the display.
In this case, contact the Technical Assistance Centre.
The boiler turns on in the status it was in before it was switched
off: if the boiler was in the winter mode when it was switched off,
it will turn on again in the winter mode. If it was in the OFF mode,
the display will show two segments in the central area (fig. 49).
Press the button to enable operation.
Choose the desired operating mode by pressing button,
until the symbol moves to:
WINTER
SUMMER
WINTER function (fig. 50)
With the selector in this position, the boiler provides hot water for
the heating and, if an external water tank is connected, provides
water to the water tank to allow domestic hot water preparation.
Function S.A.R.A Booster is enabled in this position (see chapter
“Boiler functions”).
SUMMER function (only with external water tank connected,
fig. 51)
With the selector in this position, the boiler provides water to the
water tank with a temperature stabiliser to allow domestic hot water
preparation.
Fig. 47
Fig. 48
Fig. 49
Fig. 52
A
Fig. 53
Fig. 54
open
position
Fig. 50
Fig. 51
°C
+ 4/5
+ 3
+ 2
+ 1
0
- 1
- 2
- 3
- 4/5
Adjusting domestic hot water temperature
CASE A only heating - adjusting not applicable
CASE B only heating + water tank with thermostat: in this
condition every time there is a request from the water
tank thermostat, the boiler supplies hot water to
preparing domestic hot water. During this operation on
the display the icon flashed.
CASE C only heating + water tank with sensor: to adjust domestic
hot water temperature storaged in the water tank, turn
switch D(fig. 55): clocwise to increase and
anticlockwise to decrease. The bar segments light up
(every 3°C) as the temperature is increased. About 4
seconds after the selection has been made, the
modification is memorised and the display returns to
the delivery temperature read by the sensor.

19
English
Fig. 55
D
Working the boiler
Adjust the ambient thermostat to the required temperature (approx.
20 °C). If there is a demand for heating water, the boiler starts
and the symbol is shown on the display (fig. 56). The boiler will
remain working until the set temperatures are reached, after which
it will go on stand-by. In the event of ignition or operating faults,
the boiler will perform a “safety stop”.
The flame symbol will go out and the fault code and will
be displayed (fig. 57). For a description of faults and how to reset
them, consult chapter “Troubleshooting”.
Switching off
Switching off for short periods
For brief absences press the button to switch off the boiler. The
display will show two segments in the central area (fig. 49). When
the boiler remains powered with the gas tap open, it is protected
by the following systems:
- anti-freeze (fig. 58): when the temperature of the water in the
boiler falls below safety values, the circulator and the burner
work at minimum power to increase the water temperature to a
safe value (35 °C). The symbol lights up on the display.
- circulator anti-block: one operating cycle is performed every
24 hours.
Switching off for long periods
For prolonged absences press the button to switch off the boiler
(fig. 49). The display will show two segments in the central area.
Turn the main switch to “off”.
Turn off the gas tap under the boiler by turning it clockwise (fig. 59).
In this case, the anti-freeze and anti-block systems are disabled.
Empty the water circuit or suitably protect it with a good make
of anti-freeze.
Fig. 56
Fig. 57
Fig. 58
Fig. 59
tap
closed
Boiler functions
Filling the circuit
If circuit pressure reaches 0.6 bar, the pressure value flashes on
the display (fig. 60a); if it falls below a minimum safety value (0.3
bar), fault code 41 appears on the display (fig. 60b) for a certain
time, following which, if the fault persists, fault code 40 is displayed
(see chapter on “Troubleshooting”).
In the event of faul 40 (fig. 61) proceed as follow to restore the
correct pressure value:
- press button
- open the filling tap external to the boiler, until the pressure shown
in the display is between 1 and 1,5 bar.
If you have to fill the system several times, contact the Technical
Service Centre to check whether the heating circuit is watertight
(see if there are any leaks).
Information
Press , the display turns off and just the word InFO appears (fig.
62). Press the button to view operating information. Press the
button again to move on to the next piece of information. If the
button is not pressed, the system automatically exits the function.
Info list:
Info 0 shows the word InFO (fig. 62)
Info 1 only with the external probe connected, displays external
temperature (e.g. 12 °C) (fig. 63).
The values shown on the display range between - 40 °C
and 40 °C.
Beyond these values the display shows “- -”
Fig. 60a
Fig. 60b
Fig. 61
Fig. 62
Fig. 63

20
Info 2 shows circuit pressure (fig. 64)
Info 3 shows the set heating temperature (fig. 65)
Info 4 shows the setted temperature (only water tank with sensor,
fig. 66).
Fig. 64
Fig. 65
Fig. 66
S.A.R.A. BOOSTER function
If the “winter” mode is selected, the S.A.R.A. Booster function is
activated for the heating circuit. This function allows to reach the
required ambient temperature more quickly.
Depending on the temperature set on the ambient thermostat and
the time taken to reach it, the boiler automatically adjusts the
heating water temperature to reduce operating times, thereby
increasing operating comfort and energy saving.
Fig. 67
Troubleshooting
When a fault appears on the display, the flame symbol goes out,
a flashing code is shown and the two symbols and
appear either together or separately.
For a description of the faults, consult the following table.
(D) Permanent
(T) Temporary. In this operating status the boiler attempts to eliminate the fault on its own
(°) Only with external water tank with sensor. The fault code is shown when the boiler is in stand-by
(*) For the “insufficient circuit pressure” fault, proceed with the circuit filling operations described in the “Boiler functions” chapter.
FAULT Alarm Symbol Symbol
ID
FLAME FAILURE BLOCK (D) 10 YES NO
LIMIT THERMOSTAT (D) 20 YES NO
BURNER THERMOSTAT (D) (MIX R.S.I.) 21 YES NO
FUMES THERMOSTAT (D) (R.A.I.) 22 YES YES
FUMES OUTLET OR AIR PRESSOSTAT (D) (MIX R.S.I.) 30 YES NO
FUMES OUTLET OR AIR PRESSOSTAT (T) (MIX R.S.I.) 31 NO YES
INSUFFICIENT SYSTEM PRESSURE (D*) 40 YES NO
INSUFFICIENT SYSTEM PRESSURE (T*) 41 NO YES
WATER PRESSURE TRANSDUCER (D) 42 YES YES
FALSE FLAME (D) 50 YES YES
ELECTRONIC BOARD (D) 51-59 YES YES
SANITARY PROBE 1 (T°) 60 NO YES
PRIMARY PROBE (T) 71 NO YES
LOW TEMPERATURE THERMOSTAT (T) 77 YES YES