Immergas Maior Eolo 24 4E User manual

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1  INSTALLER BOILER
INSTALLATION
1.1 INSTALLATION
RECOMMENDATIONS.
e Maior Eolo boiler has been designed for wall
mounted installation; they must be used to heat
environments, to produce domestic hot water
and similar purposes. In the case of wall instal-
lation the wall surface must be smooth, without
any protrusions or recesses enabling access to the
rear part. ey are NOT designed to be installed
on plinths or oors (Fig. 1-1).
By varying the type of installation the classica-
tion of the boiler also varies, precisely:
- Boiler type B22 if installed without the 2 intake
caps and with the top cover kit.
- Type C boiler if installed using concentric pipes
or other types of pipes envisioned for the sealed
chamber boiler for intake of air and expulsion
of ue gas.
Only professionally qualied heating/plumbing
technicians are authorised to install Immergas
gas appliances. Installation must be carried out
according to the standards, current legislation
and in compliance with local technical regula-
tions and the required technical procedures. In-
stallation of the Maior Eolo boiler when powered
by LPG must comply with the rules regarding
gases with a greater density than air (remember,
as an example, that it is prohibited to install sy-
stems powered with the above-mentioned gas in
rooms where the oor is at a lower quota that the
average external country one). Before installing
the appliance, ensure that it is delivered in per-
fect condition; if in doubt, contact the supplier
immediately. Packing materials (staples, nails,
plastic bags, polystyrene foam, etc.) constitute
a hazard and must be kept out of the reach of
children. If the appliance is installed inside or
between cabinets, ensure sufficient space for
normal servicing; therefore it is advisable to
leave clearance of at least 3 cm between the boiler
casing and the vertical sides of the cabinet. Leave
adequate space above the boiler for possible water
and ue removal connections.
Keep all ammable objects away from the ap-
pliance (paper, rags, plastic, polystyrene, etc.).
Do not place household appliances underneath
the boiler as they could be damaged if the safety
valve intervenes (if not conveyed away by a
discharge funnel), or if there are leaks from the
connections; on the contrary, the manufacturer
cannot be held responsible for any damage cau-
sed to the household appliances.
In the event of malfunctions, faults or incorrect
operation, turn the appliance o immediately
and contact a qualified technician (e.g. the
Immergas Aer-Sales Assistance centre, which
has specically trained sta and original spare
parts). Do not attempt to modify or repair the
appliance alone. Failure to comply with the above
implies personal responsibility and invalidates
the warranty.
• Installation regulations:
- this boiler can be installed outdoors in a
partially protected area. A partially protected
location is one in which the appliance is not
exposed to the direct action of the weather
(rain, snow, hail, etc..).
- Installation in places with a fire risk is
prohibited (for example: garages, box), gas
appliances and relative ue ducts, ue exhaust
pipes and combustion air intake pipes.
- Installation is also prohibited in places/en-
vironments that constitute common parts of
oce condominiums such as stairs, cellars,
entrance halls, attics, los, escape routes,
etc. if they are not located inside technical
compartments under the responsibility of
each individual building and only accessible
to the user (technical compartments and the
appliances must be realised and installed in
compliance with re prevention Standards).
Important: Wall mounting of the boiler must
guarantee stable and ecient support for the
generator.
Fig. 1-1
1.2 MAIN DIMENSIONS.
e plugs (standard supply) are to be used only in
conjunction with the mounting brackets or xing
template to x the appliance to the wall; they only
ensure adequate support if inserted correctly
(according to technical standards) in walls made
of solid or semi-hollow brick or block. In the
case of walls made from hollow brick or block,
partitions with limited static properties, or in any
case walls other than those indicated, a static test
must be carried out to ensure adequate support.
N.B.: the hex head screws supplied in the blister
pack are to be used exclusively to x the relative
mounting bracket to the wall.
ese boilers are used to heat water to below
boiling temperature in atmospheric pressure.
ey must be attached to a heating system sui-
table for their capacity and voltage.
Height
(mm)
Width
(mm)
Depth
(mm)
781 440 340
CONNECTIONS
GAS DOMESTIC
HOT WATER SYSTEM
G AC AF R M
3/4” 1/2” 1/2” 3/4” 3/4”
Fig. 1-2
Key:
G - Gas supply
AC - Domestic hot water outlet
ACV - Solar valve kit DHW inlet (Optional)
AF - Domestic cold water inlet
R - System return
M - System ow
V - Electrical connection
N.B.: connection group (optional)
YES NO

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1.3 ANTIFREEZE PROTECTION.
Minimum temperature -5°C. e boiler is sup-
plied with an antifreeze function as standard that
activates the pump and burner when the system
water temperature in the boiler falls below 4°C.
e anti-freeze function is only guaranteed if:
- the boiler is correctly connected to gas and
electricity power supply circuits;
- the boiler is powered constantly;
- the boiler is not in “O ” mode;
- the boiler is not in no ignition block (Par.2.5);
- the boiler essential components are not faulty.
In these conditions the boiler is protected against
freezing to an environmental temperature of -5°C.
Minimum temperature -15°C. If the boiler is
installed in a place where the temperature falls
below -5°C and in the event there is no gas or
the boiler goes into ignition block, the appliance
can freeze.
To prevent the risk of freezing follow the instruc-
tions below:
- protect the central heating circuit from free-
zing by introducing a good quality anti-freeze
liquid (specically for central heating systems),
carefully following the manufacturer’s instruc-
tions regarding the percentage necessary with
respect to the minimum temperature required
for preserving the system.
The materials the boilers are made from are
resistant to ethylene and propylene glycol-based
anti-freeze liquids.
For life and possible disposal, follow the supplier’s
instructions.
- Protect the domestic hot water circuit against
freezing by using an accessory that is supplied
on request (anti-freeze kit) comprising two
electric heating elements, the relevant cables
and a control thermostat (carefully read the
installation instructions contained in the ac-
cessory kit pack).
Boiler anti-freeze protection is thus ensured only if:
- the boiler is correctly connected to electricity
power supply circuits;
- main switch is inserted;
- the anti-freeze kit components are ecient.
In these conditions the boiler is protected against
freezing to temperature of -15°C.
e warranty does not cover damage due to inter-
ruption of the electrical power supply and failure
to comply with that stated on the previous page.
N.B.: if the boiler is installed in places where
the temperature falls below 0°C, the heating
attachment pipes must be insulated.
1.4 CONNECTIONS.
Gas connection (Appliance category II2H3+).
Our boilers are designed to operate with methane
gas (G20) and LPG. Supply pipes must be the
same as or larger than the 3/4”G boiler tting.
Before connecting the gas line, carefully clean
inside all the fuel feed system pipes to remove any
residue that could impair boiler eciency. Also
make sure the gas corresponds to that for which
the boiler is prepared (see boiler data-plate). If
dierent, the appliance must be converted for
operation with the other type of gas (see conver-
ting appliance for other gas types). e dynamic
gas supply (methane or LPG) pressure must also
be checked according to the type used in the
boiler, as insucient levels can reduce generator
output and cause malfunctions.
Ensure correct gas cock connection. e gas
supply pipe must be suitably dimensioned accor-
ding to current regulations in order to guarantee
correct gas ow to the burner even in conditions
of maximum generator output and to guarantee
appliance eciency (technical specications).
e coupling system must conform to standards.
Fuel gas quality. e appliance has been desig-
ned to operate with gas free of impurities; other-
wise it is advisable to t special lters upstream
from the appliance to restore the purity of the gas.
Storage tanks (in case of supply from LPG
depot).
- New LPG storage tanks may contain residual
inert gases (nitrogen) that degrade the mixture
delivered to the appliance casing functioning
anomalies.
- Due to the composition of the LPG mixture,
layering of the mixture components may occur
during the period of storage in the tanks. is
can cause a variation in the heating power of
the mixture delivered to the appliance, with
subsequent change in its performance.
Hydraulic connection.
Important: In order not to void the warranty
before making the boiler connections, carefully
clean the heating system (pipes, radiators, etc.)
with special pickling or de-scaling products to
remove any deposits that could compromise
correct boiler operation.
In compliance with Standards in force it is man-
datory to treat the water in the heating system
chemically in order to protect the system and
appliance from deposits of lime scale.
Hydraulic connections must be made in a
rational way using the couplings on the boiler
template. e boiler safety valves outlet must be
connected to a draining funnel. Otherwise, the
manufacturer declines any responsibility in case
of ooding if the drain valve cuts in.
Important: to preserve the duration of appliance
eciency features, in the presence of water whose
features can lead to the deposit of lime scale,
installation of the “polyphosphate dispenser” kit
is recommended. On the basis of the Standards in
force, it is mandatory to treat the water with over
25 French degrees in the heating circuit and over
15 French degrees for DHW using conditioning
chemicals for powers < 100 kW or with soeners
for powers > 100 kW.
Electrical connection: e “Maior Eolo” boiler
has an IPX5D protection rating for the entire
appliance. Electrical safety of the unit is reached
when it is correctly connected to an ecient
earthing system as specied by current safety
standards.
Important: Immergas S.p.A. declines any
responsibility for damage or physical injury
caused by failure to connect the boiler to an
ecient earth system or failure to comply with
the reference standards.
Also ensure that the electrical installation corre-
sponds to maximum absorbed power specications
as shown on the boiler data-plate. Boilers are sup-
plied complete with an “X” type power cable without
plug. e power supply cable must be connected to
a 230V ±10% / 50Hz mains supply respecting L-N
polarity and earth connection . is network
must also have a multi-pole circuit breaker with
class III over-voltage category. When replacing the
power supply cable, contact a qualied technician
(e.g. the Immergas Aer-Sales Technical Assistance
Service). e power cable must be laid as shown.
In the event of mains fuses replacement on the
connection board, use a 3.15A quick-blow fuses.
For the main power supply to the appliance,
never use adapters, multiple sockets or exten-
sion leads.

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Important: if the system is subdivided into zones
using the relevant kit. the CARV2 must be used
with its climate thermostat function disabled, i.e.
it must be set to On/O mode.
Comando Amico Remoto remote controlV2or
On/Off chrono-thermostat electrical con-
nections (Optional). e operations described
below must be performed aer having removed
the voltage from the appliance. Any thermostat
or On/O environment chrono-thermostat must
be connected to clamps 40 and 41 eliminating
jumper X40 (Fig. 3-2). Make sure that the On/
O thermostat contact is of the “clean” type, i.e.
independent of the mains supply, otherwise the
electronic adjustment card would be damaged.
Any Comando Amico Remoto remote controlV2
must be connected to clamps 40 and 41 elimi-
nating jumper X40 on the circuit board, paying
attention not to invert the connections (Fig. 3-2).
Important: if the Comando Amico Remoto
remote controlV2 or any other On/O chrono-
thermostat is used arrange two separate lines in
compliance with current regulations regarding
electrical systems. No boiler pipes must ever be
used to earth the electric system or telephone li-
nes. Ensure elimination of this risk before making
the boiler electrical connections.
1.6 EXTERNAL PROBE OPTIONAL.
e boiler is prepared for the application of the
external probe (Fig. 1-7), which is available as
an optional kit.
e probe can be connected directly to the boiler
electrical system and allows the max. system
ow temperature to be automatically decreased
when the external temperature increases, in
order to adjust the heat supplied to the system
according to the change in external temperature.
e external probe always acts when connected
independently from the presence or type of room
thermostat used. e correlation between system
ow temperature and external temperature is de-
termined by the position of the selector switch on
the boiler control panel according to the curves
shown in the diagram (Fig. 1-8). e electric con-
nection of the external probe must be made on
clamps 38 and 39 on the boiler P.C.B. (Fig. 3-2).
1.5 REMOTE CONTROLS AND
ROOM CHRONOTHERMOSTATS
OPTIONAL.
e boiler is prepared for the application of room
chrono-thermostats or remote controls, which
are available as optional kits.
All Immergas chrono-thermostats are connec-
ted with 2 wires only. Carefully read the user
and assembly instructions contained in the
accessory kit.
• On/O digital chrono-thermostat (Fig. 1-5).
e chrono-thermostat allows:
- to set two room temperature values: one for
day (comfort temperature) and one for night
(lower temperature);
- to set up to four on/o dierential weekly
programs;
- to select the required operating mode from
the various possible alternatives:
• permanent functioning in comfort temp;
• permanent functioning in reduced temp;
• permanent functioning in adjustable anti-
freeze temp.
e chrono-thermostat is powered by two 1.5V
LR 6 type alkaline batteries.
• Comando Amico Remoto Remote Control De-
viceV2 (CARV2) with climate chrono-thermostat
function. In addition to the functions described
in the previous point, the CAR panelV2 enables
the user to control all the important infor-
mation regarding operation of the appliance
and the heating system with the opportunity
of easily intervening on the previously set
parameters without having to go to the place
where the appliance is installed. e panel is
provided with self-diagnosis to display any
boiler functioning anomalies. e climate chro-
no-thermostat incorporated into the remote
panel enables the system ow temperature to
be adjusted to the actual needs of the room
being heated, in order to obtain the desired
room temperature with extreme precision and
therefore with evident saving in running costs.
e chrono-thermostat is fed directly by the
boiler by means of the same 2wires used for
the transmission of data between boiler and
chrono-thermostat.
45
31
58
Fig. 1-8
Fig. 1-7
On/O digital chrono-thermostat. Comando Amico Remoto remote controlV2 (CARV2)
Fig. 1-6
Fig. 1-5
POSITION OF THE CENTRAL HEATING
TEMPERATURE USER ADJUSTMENT
TM (°C)
TE (°C)
FLOW T.
TE (°C)

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1.7 IMMERGAS FLUE SYSTEMS.
Immergas supplies various solutions separately
from the boiler regarding the installation of air
intake terminals and ue extraction, which are
fundamental for boiler operation.
Important: e boiler must only be installed
together with an original Immergas air intake
and ue gas exhaust system. is system can be
identied by an identication mark and special
distinctive marking bearing the note: “not for
condensing boilers”.
e ue exhaust pipes must not be in contact with
or be near to ammable materials. Moreover,
they must not pass through buildings or walls
made of ammable material.
See following paragraphs for the detailed descrip-
tion of the kits available.
Positioning of double lip seals. For correct
positioning of lip seals on elbows and extensions,
follow the direction of assembly given in gure
(Fig. 1-9).
• Resistance factors and equivalent lengths. Each
ue extraction system component has a Resi-
stance Factor based on experimental tests and
specied in the table below. e resistance factor
for individual components is independent from
the type of boiler on which it is installed or the
actual dimensions. It is, however, conditioned
by the temperature of the uids that pass throu-
gh the pipe and therefore varies according to
applications for air intake or ue exhaust. Each
single component has a resistance corresponding
to a certain length in metres of pipe of the same
diameter; the so-called equivalent length, obtained
from the ration between the relative Resistance
Factors. All boilers have an experimentally obtaina-
ble maximum Resistance Factor equal to 100. e
maximum Resistance Factor allowed corresponds
to the resistance encountered with the maximum
allowed pipe length for each type of Terminal
Kit. is information enables calculations to be
made in order to verify the possibility of various
congurations of ue extraction systems.
1.8 INSTALLAZIONE ALL’ESTERNO
IN LUOGO PARZIALMENTE
PROTETTO.
N.B.: a partially protected area is one in which the
appliance is not exposed to the direct action of the
weather (rain, snow, hail, etc..).
• Conguration type B, open chamber and fan
assisted.
The relevant terminal must be used for this
conguration (present in the intake kit for the
installation in question), which must be placed
on the central hole of the boiler (Fig. 1-12). Air
intake takes place directly from the environment
in which the boiler is installed and ue exhaust
in individual ue or to the outside.
In this conguration the boiler is classied as
type B22.
With this conguration:
- air intake takes place directly from the environ-
ment in which the boiler is installed and only
functions in permanently ventilated rooms;
- the ue exhaust must be connected to its own
individual ue or channelled directly into the
external atmosphere.
The technical regulations in force must be
respected.
Flue gas separator adjustment. For correct
functioning of the boiler in conguration with
direct intake it is necessary to regulate the ue
gas shutter according to that stated in the relative
tables (Fig. 1-14).
• Cover kit assembly (Fig. 1-11). Remove the
two plugs and the gaskets present from the two
lateral holes with respect to the central one. Now
cover the right intake hole using the relevant
plate, xing it onto the le side using the two
supplied screws. Install the Ø80 outlet ange on
the central hole of the boiler, taking care to insert
the gasket supplied with the kit and tighten by
means of the screws provided. Install the upper
cover, xing it using the 4 screws present in the
kit, positioning the relevant gaskets. Engage the
90° Ø80 bend with the male end (smooth) in
the female end (with lip seal) of the Ø80 ange
unit until it stops. Introduce the gasket, making
it run along the bend. Fix it using the sheet steel
plate and tighten by means of the straps present
in the kit, making sure to block the 4 gasket
aps. Fit the male end (smooth) of the exhaust
terminal into the female end of the bend 90°
Ø80, making sure that the relevant wall sealing
plate is already tted; this will ensure hold and
joining of the elements making up the kit.
• Coupling of extension pipes. To install push-
tting extensions with other elements of the
ue extraction elements assembly, proceed as
follows: Install the pipe or elbow with the male
side (smooth) in the female section (with lip
seal) to the stop on the previously installed
element. is will ensure sealing eciency of
the coupling.
Max. length of exhaust duct. The flue pipe
(vertical or horizontal) can be extended to a
max. length of 12 m straight route, using insulated
pipes (Fig. 1-31). To prevent problems of ue gas
condensate in the exhaust pipe Ø 80, due to ue
gas cooling through the wall, the length of the
pipe (not insulated) must be limited to just 5 m.
Example of installation with direct vertical
terminal in partially protected location. When
the vertical terminal for direct discharge of com-
bustion products is used, a minimum gap of 300
mm must be le between the terminal and the
balcony above. e height A + B (always with
respect to the balcony above), must be equal to
or greater than 2000 mm. (Fig. 1-13).
• Configuration without cover kit (boiler
typeC).
By leaving the side plugs tted, it is possible to
install the appliance externally, in partially co-
vered places, without the cover kit. Installation
takes place using the Ø60/100 and Ø80/125
concentric horizontal intake/ exhaust kits. Refer
to the paragraph relative to indoor installation.
In this conguration the top cover kit guarantees
additional protection for the boiler. It is recom-
mended but not compulsory.
Fig. 1-9 Fig. 1-10

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Fig. 1-12
Fig. 1-13
Fig. 1-11
Fig. 1-14
Fig. 1-15
Flue gas separator adjustment. For correct fun-
ctioning of the boiler it is necessary to regulate
the ue gas shutter positioned on the air/ue gas
sample points (Fig. 1-14).
Adjustment is carried out by loosening the
front retainer screw and moving the indicator
to the correct position, aligning its value to the
horizontal reference. Once adjustment has been
performed, tighten the screw to x the separator.
Appropriate adjustment takes place on the basis
of the type of pipe and its extension: this calcula-
tion can be carried out using the relevant tables.
Intake diaphragm installation. For correct boi-
ler functioning with Ø80 separator kits and drain
measuring > 1 m a diaphragm must be installed
on the sealed chamber intake hole and before
the intake pipe (Fig. 1-15). e choice of suitable
diaphragm takes place on the basis of the type of
pipe and its maximum extension: this calculation
can be carried out using the following tables:
N.B.: the diaphragms are supplied together with
the boiler.
DIAPHRAGM
e cover kit includes:
N° 1 Heat moulded cover
N° 1 Gasket clamping plate
N° 1 Gasket
N° 1 Gasket clamp
N° 1 N°1 Intake hole covering
plate
e terminal kit includes:
N° 1 Gasket
N° 1 Exhaust ange Ø80
N° 1 Bend 90° Ø80
N° 1 Exhaust pipe Ø80
N° 1 Wall sealing plate
VERTICAL TERMINAL KIT FOR
DIRECT DRAINING
INTAKE COVER KIT

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Shutter regulation table
Maior Eolo 24 4E.
Shutter regulation table
Maior Eolo 28 4E.
Shutter regulation table
Maior Eolo 32 4E.
Flue gas shutter notch
Type of installation
(duct length in metres)
1 3 4 5 6 10
Ø60/100 horizontal concentric kit - - Da 0 a 0,5 Da 0,5 a 1,5 - Da 1,5 a 3,0
Ø60/100 vertical concentric kit - - Da 0 a 2,2 Da 2,2 a 3,7 - Da 3,7 a 4,7
Ø80/125 horizontal concentric kit - - Da 0 a 0,5 Da 0,5 a 4,6 - Da 4,6 a 7,4
Ø80/125 vertical concentric kit - - Da 0 a 5,4 Da 5,4 a 9,5 - Da 9,5 a 12,2
Ø80 vertical separator kit without bends *Da 0 a 20 *Da 20 a 40 **Da 0 a 22 - - **Da 22 a 32
Ø80 horizontal separator kit with two bend *Da 0 a 16 *Da 16 a 35 **Da 0 a 17 - - **Da 17 a 28
Direct intake kit and Ø80 drain in B22 conguration - - Da 0 a 1 - Da 1 a 12 -
* ese maximum extension values are considered intake with 1 metre drain pipe
** ese maximum extension values are considered in draining with 1 metre intake pipe and Ø44 diaphragm on the intake hole.
Type of installation
(duct length in metres)
2 4 7 10
Ø60/100 horizontal concentric kit - Da 0 a 0,5 Da 0,5 a 1,5 Da 1,5 a 3,0
Ø60/100 vertical concentric kit - Da 0 a 2,2 Da 2,2 a 3,7 Da 3,7 a 4,7
Ø80/125 horizontal concentric kit - Da 0 a 0,5 Da 0,5 a 4,6 Da 4,6 a 7,4
Ø80/125 vertical concentric kit - Da 0 a 5,4 Da 5,4 a 9,5 Da 9,5 a 12,2
Ø80 vertical separator kit without bends *Da 0 a 20 *Da 20 a 40 **Da 0 a 22 ** Da 22 a 32
Ø80 horizontal separator kit with two bend *Da 0 a 16 *Da 16 a 35 **Da 0 a 17 ** Da 17 a 28
Direct intake kit and Ø80 drain in B22 conguration Da 0 a 1 - Da 1 a 12 -
* ese maximum extension values are considered intake with 1 metre drain pipe
** ese maximum extension values are considered in draining with 1 metre intake pipe and Ø 50 diaphragm on the intake hole.
Type of installation
(duct length in metres)
3 4 5 6 10
Ø60/100 horizontal concentric kit - - Da 0 a 0,5 Da 0,5 a 1,5 Da 1,5 a 3,0
Ø60/100 vertical concentric kit - - Da 0 a 2,2 Da 2,2 a 3,7 Da 3,7 a 4,7
Ø80/125 horizontal concentric kit - - Da 0 a 0,5 Da 0,5 a 4,6 Da 4,6 a 7,4
Ø80/125 vertical concentric kit - - Da 0 a 5,4 Da 5,4 a 9,5 Da 9,5 a 12,2
Ø80 vertical separator kit without bends *Da 0 a 20 *Da 20 a 40 **Da 0 a 22 - **Da 22 a 32
Ø80 horizontal separator kit with two bend *Da 0 a 16 *Da 16 a 35 **Da 0 a 17 - **Da 17 a 28
Direct intake kit and Ø80 drain in B22 conguration - Da 0 a 1 - Da 1 a 12 -
* ese maximum extension values are considered intake with 1 metre drain pipe
** ese maximum extension values are considered in draining with 1 metre intake pipe and Ø 50 diaphragm on the intake hole.

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Tables of Resistance Factors and Equivalent Lengths.
DUCT TYPE
Resistance
Factor
(R)
Equivalent
length in m of
concentric pipe
Ø60/100
Equivalent
length in m of concentric
pipe
Ø80/125
Equivalent
length
in m of pipe
Ø80
Concentric pipe Ø60/100 m 1 Intake and
Exhaust 16,5 m 1 m 2,8 Intake m 7,1
Exhaust m 5,5
Concentric bend 90° Ø60/100 Intake and
Exhaust 21 m 1,3 m 3,5 Intake m 9,1
Exhaust m 7,0
Concentric bend 45° Ø60/100 Intake and
Exhaust 16,5 m 1 m 2,8 Intake m 7,1
Exhaust m 5,5
Terminal complete with concentric
horizontal intake-exhaust Ø60/100 Intake and
Exhaust 46 m 2,8 m 7,6
Intake m 20
Exhaust m 15
Terminal complete with horizontal
intake-exhaust Ø60/100 Intake and
Exhaust 32 m 1,9 m 5,3 Intake m 14
Exhaust m 10,6
Terminal complete with concentric vertical
intake-exhaust Ø60/100 Intake and
Exhaust 41,7 m 2,5 m 7
Intake m 18
Exhaust 14
Concentric pipe Ø80/125 m 1 Intake and
Exhaust 6 m 0,4 m 1,0 Intake m 2,6
Exhaust m 2,0
Concentric bend 90° Ø80/125 Intake and
Exhaust 7,5 m 0,5 m 1,3 Intake m 3,3
Exhaust m 2,5
Concentric bend 45° Ø80/125 Intake and
Exhaust 6 m 0,4 m 1,0 Intake m 2,6
Exhaust m 2,0
Terminal complete with intake-exhaust
vertical concentric Ø80/125 Intake and
Exhaust 33 m 2,0 m 5,5
Intake m 14,3
Exhaust m 11,0
Terminal complete with concentric vertical
intake-exhaust Ø80/125 Intake and
Exhaust 26,5 m 1,6 m 4,4
Intake m 11,5
Exhaust m 8,8
Terminal complete with concentric
horizontal intake-exhaust Ø80/125 Intake and
Exhaust 39 m 2,3 m 6,5
Intake m 16,9
Exhaust m 13
Terminal complete with horizontal
intake-exhaust Ø80/125 Intake and
Exhaust 34 m 2,0 m 5,6
Intake m 14,8
Exhaust m 11,3
Concentric adapter from Ø60/100
to Ø80/125 with condensate trap Intake and
Exhaust 13 m 0,8 m 2,2 Intake m 5,6
Exhaust m 4,3
Concentric adapter from Ø60/100
to Ø80/125 Intake and
Exhaust 2 m 0,1 m 0,3 Intake m 0,8
Exhaust m 0,6
Pipe Ø80 m 1 (with and without insula-
tion) Intake 2,3 m 0,1 m 0,4 Intake m 1,0
Exhaust 3 m 0,2 m 0,5 Exhaust m 1,0
Complete air intake terminal Ø80
m 1 (with or without insulation) Intake 5 m 0,3 m 0,8 Intake m 2,2
Intake terminal Ø80
Exhaust terminal Ø80
Intake 3 m 0,2 m 0,5 Intake m 1,3
Exhaust 2,5 m 0,1 m 0,4 Exhaust m 0,8
Bend 90° Ø80 Intake 5 m 0,3 m 0,8 Intake m 2,2
Exhaust 6,5 m 0,4 m 1,1 Exhaust m 2,1
Bend 45° Ø80 Intake 3 m 0,2 m 0,5 Intake m 1,3
Exhaust 4 m 0,2 m 0,6 Exhaust m 1,3
Parallel split Ø80 from
Ø60/100 to Ø80/80 Intake and
Exhaust 8,8 m 0,5 m 1,5 Intake m 3,8
Exhaust m 2,9

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C12
1.9 INDOOR INSTALLATION.
• Type C conguration, sealed chamber and
fan assisted.
Horizontal intake - exhaust kit Ø60/100. Kit
assembly (Fig. 1-16): install the bend with ange
(2) onto the central hole of the boiler inserting
the gasket (1) and tighten using the screws in the
kit. Couple the terminal pipe (3) with the male
end (smooth) into the female end of the bend
(with lip seals) up to the stop; making sure that
the internal wall sealing plate and external wall
sealing plate have been tted, this will ensure
sealing and joining of the elements making up
the kit.
Note: when the boiler is installed in areas where
very rigid temperatures can be reached, a special
anti-freeze kit is available that can be installed as
an alternative to the standard kit.
• Coupling extension pipes and concentric
elbows Ø60/100. To snap-t extensions with
other elements of the ue extraction elements,
operate as follows engage the concentric pipe
or elbow with the male side (smooth) on the
female section (with lip seal) up to the stop
on the previously installed element. is will
ensure sealing and joining of the elements
correctly.
e Ø60/100 horizontal intake/exhaust kit can
be installed with the rear, right side, le side and
front outlet.
• Application with rear outlet (Fig. 1-17). e
970 mm pipe length enables routing through
a maximum thickness of 710 mm. Normally
the terminal must be shortened. Calculate
the distance by adding the following values:
Part thickness + internal projection + exter-
nal projection. e minimum indispensable
projection values are given in the gure.
• Application with side outlet (Fig. 1-18); Using
the horizontal intake-exhaust kit, without the
special extensions, enables routing through
a wall thickness of 724 mm with the le side
outlet and 646 with the right side outlet.
• Extensions for horizontal kit. e horizontal
intake-exhaust kit Ø60/100 can be extended
up to a max. horizontal distance of 3,000 mm
including the terminal with grid and excluding
the concentric bend leaving the boiler. is
conguration corresponds to a resistance factor
of 100. In these cases the special extensions
must be requested.
Connection with N°1 extension (Fig. 1-19).
Max. distance between vertical boiler axis and
external wall is 1855mm.
Connection with N°2 extensions (Fig. 1-20).
Max. distance between vertical boiler axis and
external wall is 2805mm.
Horizontal intake-exhaust kit Ø80/125. Kit
assembly (Fig. 1-21): install the bend with ange
(2) onto the central hole of the boiler inserting
the gasket (1) and tighten using the screws in the
kit. Fit the male end (smooth) of the adapter (3)
up to the stop on the female end of the bend (2)
(with lip seal). Fit the Ø80/125 (4) concentric
terminal pipe with the male end (smooth) to the
female end of the adapter (3) (with lip gasket) up
to the stop; making sure that the internal wall
sealing plate and external wall sealing plate have
been tted, this will ensure sealing and joining
of the elements making up the kit.
• Coupling extension pipes and concentric elbows
Ø80/125. To snap-t extensions with other ele-
ments of the ue extraction elements, operate as
follows engage the concentric pipe or elbow with
the male side (smooth) on the female section
(with lip seal) up to the stop on the previously
installed element. is will ensure sealing and
joining of the elements correctly.
Important: if the exhaust terminal and/or exten-
sion concentric pipe needs shortening, consider
that the internal pipe must always protrude by
5mm with respect to the external pipe.
Normally the Ø80/125 horizontal intake-exhaust
kit is used if particularly long extensions are re-
quired; the Ø80/125 kit can be installed with the
rear, right side, le side or front outlet.
• Extensions for horizontal kit. e Ø 80/125
horizontal intake-exhaust kit can be extended
up to a max. horizontal distance of 7,300 mm
including the terminal with grid and excluding
the concentric bend leaving the boiler and the
adapter Ø60/100 in Ø80/125 (Fig. 1-22). is
conguration corresponds to a resistance factor
of 100. In these cases the special extensions
must be requested.
N.B.: when installing the ducts, a section clamp
with pin must be installed every 3 metres.
• External grill. N.B.: for safety purposes, do not
even temporarily obstruct the boiler intake/
exhaust terminal.
Fig. 1-16
C12
C12 C12
C12
Fig. 1-17
Fig. 1-19
Fig. 1-20
Fig. 1-18
1
3
2
45
e kit includes:
N°1 - Gasket (1)
N°1 - Concentric bend 90° (2)
N°1 - Intake-exhaust concentric pipe
Ø60/100 (3)
N°1 - Internal white wall sealing plate (4)
N°1 - External grey wall sealing plate (5)

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C32
Fig. 1-25Fig. 1-24
C32
Fig. 1-21
C12
Fig. 1-22
Vertical kit with aluminium tile Ø80/125. Kit
assembly (Fig. 1-24): install the concentric ange
(2) on the central hole of the boiler inserting the
gasket (1) and tighten using the screws in the
kit. Fit the male end (smooth) of the adapter (3)
into the female end of the concentric ange (2).
Imitation aluminium tile installation. Replace the
tile with the aluminium sheet (5), shaping it to
ensure that rainwater runs o. Position the xed
half-shell (7) and insert the intake-exhaust pipe
(6). Fit the Ø80/125 concentric terminal pipe
with the male end (6) (smooth) to the female
end of the adapter (3) (with lip gasket) up to the
stop; making sure that the wall sealing plate has
been tted, this will ensure sealing and joining
of the elements making up the kit.
• Coupling extension pipes and concentric
elbows. To install push-fitting extensions
with other elements of the flue extraction
elements assembly, proceed as follows: engage
the concentric pipe or elbow with the male
side (smooth) on the female section (with lip
seal) up to the stop on the previously installed
element. is will ensure sealing and joining
of the elements correctly.
Important: if the exhaust terminal and/or exten-
sion concentric pipe needs shortening, consider
that the internal pipe must always protrude by
5mm with respect to the external pipe.
is specic terminal enables ue exhaust and
air intake, necessary for combustion, in a vertical
direction.
N.B.: e Ø80/125 vertical kit with aluminium
tile enables installation on terraces and roofs
with a maximum slope of 45% (25°) and the
height between the terminal cap and half-shell
(374mm) must always be respected.
e vertical kit with this conguration can be
extended up to a maximum of 12,200 mm vertical
rectilinear, with the terminal included (Fig. 1-25).
is conguration corresponds to a resistance
factor of 100. In this case the special extensions
must be requested.
The terminal Ø 60/100 can also be used for
vertical exhaust, in conjunction with concentric
flange code 3.011141 (sold separately). The
height between the terminal cap and half-shell
(374mm) must always be respected.
e vertical kit with this conguration can be
extended up to a maximum of 4,700 mm vertical
rectilinear, with the terminal included (Fig. 1-25).
Separator kit Ø80/80. e Ø80/80 separator kit,
allows separation of the exhaust ues and air intake
pipes according to the diagram shown in the gure .
Combustion products are expelled from pipe (S).
Air is taken in through pipe (A) for combustion.
e intake pipe (A) can be installed either on the
right or le hand side of the central exhaust pipe
(S). Both ducts can be routed in any direction.
• Kit assembly (Fig. 1-26): install ange (4) on the
central hole of the boiler, tting gasket (1) and
tighten with the at-tipped hex screws included
in the kit. Remove the at ange present in the
lateral hole with respect to the central one (ac-
cording to needs) and replace it with the ange
(3), positioning the gasket (2) already present in
the boiler and tighten using the supplied self-
threading screws. Fit the male end (smooth) to
the bends (5) in the female end of the anges
(3 and 4). Fit the intake terminal (6) with the
male section (smooth) in the female section of
the bend (5) up to the stop, ensuring that the
internal and external wall sealing plates are
tted. Fit the exhaust pipe (9) with the male end
(smooth) to the female end of the bend (5) up
to the stop; making sure that the internal wall
sealing plate has been tted, this will ensure
sealing and joining of the elements making up
the kit.
e kit includes:
N°1 - Gasket (1)
N°1 - Female concentric ange
(2)
N°1 - Adapter Ø60/100
for Ø80/125 (3)
N°1 - Wall sealing plate (4)
N°1 - Aluminium tile (5)
N°1 - Concentric intake-
exhaust terminal
Ø80/125 (6)
N°1 - Fixed half-shell (7)
N°1 - Mobile half-shell (8)
1
3
2
56
4
1
2
3
4
6
5
7
8
e kit includes:
N°1 - Gasket (1)
N°1 - Concentric bend Ø60/100 (2)
N°1 - Adapter Ø60/100 for Ø80/125 (3)
N°1 - Int./exhaust concentric terminal
Ø80/125 (4)
N°1 - Internal white wall sealing plate (5)
N°1 - External grey wall sealing plate (6)
C12
MAXIMUM LENGTH 12200 mm
MAXIMUM LENGTH 4,700 mm

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• Extension pipes and elbows push-ttings. To
install push-tting extensions with other ele-
ments of the ue extraction elements assembly,
proceed as follows: engage the pipe or elbow
with the male side (smooth) in the female
section (with lip seal) up to the stop on the
previously installed element. is will ensure
sealing eciency of the coupling.
• Installation clearances. Figure 1-26 gives the
min. installation space dimensions of the
Ø 80/80 separator terminal kit in limited
conditions.
• Figure 1-27 shows the conguration with ver-
tical exhaust and horizontal intake.
• Extensions for the separator kit Ø80/80. e
max. vertical straight length (without bends)
that can be used for Ø80 intake and exhaust
pipes is 41 metres of which 40 intake and 1
exhaust. The total length corresponds to a
resistance factor of 100. e total usable length
obtained by adding the length of the intake and
exhaust pipes Ø80, must not exceed the values
stated in the following table. If mixed accesso-
ries or components are used (e.g. changing from
a separator Ø80/80 to a concentric pipe), the
maximum extension can be calculated by using
a resistance factor for each component or the
equivalent length. e sum of these resistance
factors must not exceed 100.
• Temperature loss in flue ducts. To prevent
problems of ue gas condensate in the exhaust
pipe Ø80, due to ue gas cooling through the
wall, the length of the pipe must be limited to
just 5 m. (Fig. 1-29). If longer distances must
be covered, use Ø80 pipes with insulation (see
insulated separator kit Ø80/80 chapter).
N.B.: when installing the Ø80 ducts, a section
clamp with pin must be installed every 3metres.
C82
Fig. 1-26
C42
C52
Fig. 1-27
Fig. 1-29
C82
Fig. 1-28
Maximum usable lengths
(including intake terminal with grill and two 90° bends)
NON-INSULATED PIPE CONDOTTO COIBENTATO
Drain (metres) Intake (metres) Drain (metres) Intake (metres)
1 36,0* 6 29,5*
2 34,5* 7 28,0*
3 33,0* 8 26,5*
4 32,0* 9 25,5*
5 30,5* 10 24,0*
* e air intake pipe can be increased to 2.5 metres if the exhaust bend is eli-
minated, 2 metres if the air intake bend is eliminated, 4.5 metres eliminating
both bends.
11 22,5*
12 21,5*
4
6
5
1
3
2
78
5
9
7A
S
e kit includes:
N°1 - Exhaust gasket (1)
N°1 - Female intake ange (3)
N°1 - Flange seal (2)
N°1 - Female exhaust ange (4)
N°2 - 90° bend Ø 80 (5)
N°1 - Intake terminal Ø 80 (6)
N°2 - Internal white wall sealing plates (7)
N°1 - External grey wall sealing plate (8)
N°1 - Exhaust pipe Ø 80 (9)

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Insulated separator kit Ø80/80. Kit assembly
(Fig. 1-30): install ange (4) on the central hole
of the boiler, tting gasket (1) and tighten with
the at-tipped hex screws included in the kit.
Remove the at ange present in the lateral hole
with respect to the central one (according to ne-
eds) and replace it with the ange (3), positioning
the gasket (2) already present in the boiler and
tighten using the supplied self-threading screws.
Insert and slide cap (6) onto bend (5) from the
male side (smooth), and join bends (5) with the
male side (smooth) in the female side of ange
(3). Fit bend (11) with the male side (smooth)
into the female side of ange (4). Fit the male
end (smooth) of the intake terminal (7) up to the
stop on the female end of the bend (5), making
sure you have already inserted the wall sealing
plates (8 and 9) that ensure correct installation
between pipe and wall, then x the closing cap
(6) on the terminal (7). Join the exhaust pipe (10)
with the male side (smooth) in the female side
of the bend (11) to the end stop, ensuring that
the wall sealing plate (8) is already inserted for
correct installation between the pipe and ue.
• Coupling extension pipes and elbows. To snap-
t extensions with other elements of the ue gas
extraction elements, operate as follows: engage
the concentric pipe or elbow with the male
side (smooth) on the female section (with lip
seal) up to the stop on the previously installed
element. is will ensure sealing and joining
of the elements correctly.
• Insulation of separator terminal kit. Whenever
there are ue gas condensate problems in the
exhaust pipes or on the external surface of the
intake pipes, on request Immergas supplies
insulated intake-exhaust pipes. Insulation
may be necessary on the exhaust pipe, due to
excessive loss of temperature of the ue gas on
their route. Insulation may be necessary on
the intake pipe as the air entering (if very cold)
may cause the outside of the pipe to fall below
the dew point of the environmental air. e
gures (Fig. 1-31 and 1-32) illustrate dierent
applications of insulated pipes.
Insulated pipes are formed of a Ø80 internal
concentric pipe and a Ø125 external pipe with
static air space. It is not technically possible
to start with both Ø 80 elbows insulated, as
clearances will not allow it. However starting
with an insulated elbow is possible by choosing
either the intake or exhaust pipe. When star-
ting with the insulated intake bend it must be
engaged on its ange until it is taken up to stop
on the ue gas exhaust ange, a situation that
takes the two intake ue gas exhaust outlets to
the same height.
• Temperature loss in insulated ue ducting.
To prevent problems of ue gas condensate in
the exhaust pipe Ø80, due to ue gas cooling
through the wall, the length of the pipe must be
limited to 12 m. e gure (Fig. 1-32) illustrates
a typical insulation application in which the
intake pipe is short and the exhaust pipe is
very long (over 5 m). e entire intake pipe is
insulated to prevent moist air in the place where
the boiler is installed, in contact with the pipe
cooled by air entering from the outside. e
entire exhaust pipe, except the elbow leaving
the splitter is insulated to reduce heat loss from
the pipe, thus preventing the formation of ue
gas condensate.
N.B.: When installing the insulated pipes, a
section clamp with pin must be installed every
2 metres.
• Conguration type B, open chamber and fan
assisted.
When using type B installation conguration
indoors, it is compulsory to install the relative up-
per cover kit along with the ue gas discharge kit.
e air intake comes directly from the area where
the boiler is installed and from the ue exhaust
in each single ue or directly from outdoors.
e boiler in this conguration, following the
assembly instructions stated in the par. 1.8 is
classied as type B.
With this conguration:
- air intake takes place directly from the environ-
ment in which the boiler is installed and only
functions in permanently ventilated rooms.
- e ue exhaust must be connected to its own
individual ue or channelled directly into the
external atmosphere.
- Type B open chamber boilers must not be
installed in places where commercial, artisan
or industrial activities take place, which use
products that may develop volatile vapours
or substances (e.g. acid vapours, glues, paints,
solvents, combustibles, etc.), as well as dusts
(e.g. dust deriving from the working of wood,
coal nes, cement, etc.), which may be dama-
ging for the components of the appliance and
jeopardise functioning.
On installation indoors in type B conguration
it is mandatory to install the relevant top cover
kit along with the ue gas exhaust kit.
The technical regulations in force must be
respected.
C82
Fig. 1-31
Fig. 1-32
C82
C82
Fig. 1-30
e kit includes:
N°1 - Exhaust gasket (1)
N°1 - Flange seal (2)
N°1 - Female intake ange (3)
N°1 - Female exhaust ange (4)
N°1 - Bend 90° Ø 80 (5)
N°1 - Pipe closure cap (6)
N°1 - Intake terminal Ø 80 insulated (7)
N°2 - Internal white wall sealing plates (8)
N°1 - External grey wall sealing plate (9)
N°1 - Discharge pipe Ø 80 insulated (10)
N°1 - Concentric bend 90° Ø 80/125 (11)
5
4
1
3
2
5678
8
10 11 9
S
A

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1.10 FLUE EXHAUST TO FLUE/CHIMNEY.
Flue gas exhaust does not necessarily have to be
connected to a branched type traditional ue.
e ue exhaust can be connected to a special
LAS type multiple ue. Multiple and combined
ues must be specially designed according to
the calculation method and requirements of the
standards, by professionally qualied technical
sta. Chimney or ue sections for connection
of the exhaust pipe must comply with requisites
of technical standards in force.
1.11 DUCTING OF EXISTING FLUES.
With a specic “ducting system” it is possible to
reuse existing ues, chimneys and technical ope-
nings to discharge the boiler ue gases. Ducting
requires the use of ducts declared to be suitable
for the purpose by the manufacturer. Follow the
installation and user instructions provided by the
manufacturer and the requirements of standards.
1.12 FLUES, CHIMNEYS AND CHIMNEY
CAPS.
e ues, chimneys and chimney caps for the
evacuation of combustion products must be in
compliance with applicable standards.
Positioning the draught terminals. e draught
terminals must:
- be installed on external perimeter walls of the
building;
- be positioned according to the minimum di-
stances specied in current technical standards.
Combustion products exhaust of fan assisted
appliances in open-top closed environments.
In spaces closed on all sides with open tops
(ventilation pits, courtyards etc.), direct ue gas
exhaust is allowed for natural or forced draught
gas appliances with a heating power range from
4 to 35 kW, provided the conditions as per the
current technical standards are respected.
1.13 SYSTEM FILLING.
Once the boiler is connected, proceed with sy-
stem lling via the lling valve (Fig. 2-2).
Filling is performed at low speed to ensure rele-
ase of air bubbles in the water via the boiler and
heating system vents.
e boiler has a built-in automatic venting valve
on the pump. Check if the cap is loose.
Open the radiator air vent valves. Close radiator
vent valves only when water escapes from them.
Close the lling valve when the boiler manometer
indicates approx. 1.2 bar.
N.B.: during these operations turn on the
circulation pump at intervals, by means of the
stand-by/summer winter button (2) positioned
on the control panel. Vent the circulation pump
by loosening the front cap and keeping the motor
running.
Tighten the cap aer the operation.
1.14 GAS SYSTEM STARTUP.
To start up the system proceed as follows:
- open windows and doors;
- avoid presence of sparks or naked ames;
- bleed all air from pipelines;
- check that the internal system is properly sealed
according to specications.
1.15 BOILER STARTUP IGNITION.
For issue of the envisioned Declaration of Con-
formity, the following must be performed for
boiler start-up:
- check that the internal system is properly sealed
according to specications;
- make sure that the type of gas used corresponds
to boiler settings;
- switch the boiler on and check correct ignition;
- make sure that the gas ow rate and relevant
pressure values comply with those given in the
manual (par. 3.18);
- ensure that the safety device is engaged in the
event of gas supply failure and check activation
time;
- check activation of the main switch located
upstream from the boiler;
- check that the intake/exhaust concentric ter-
minal (if tted) is not blocked.
e boiler must not be started up even if only
one of the checks should be negative.
N.B.: the boiler preliminary check must be carried
out by a qualied technician. e conventional
boiler warranty is valid as of the date of testing.
e test certicate and warranty is issued to the
user.

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Total head available to the system.
Fig. 1-33
A = Head available to the system at
maximum speed with by-pass
excluded.
B = Head available to the system at
maximum speed with by-pass
inserted.
C = Head available to the system
at second speed with by-pass
excluded.
D = Head available to the system
at second speed with by-pass
inserted.
1.16 CIRCULATION PUMP.
e boilers are supplied with a built-in circula-
tion pump with 3-position electric speed control.
e boiler does not operate correctly with the
circulation pump on rst speed. To ensure opti-
mal boiler operation, in the case of new systems
(single pipe and module) it is recommended to
use the pump at maximum speed. e pump is
already tted with a condenser.
Pump release. If, aer a prolonged period of
inactivity, the circulation pump is blocked,
unscrew the front cap and turn the motor sha
using a screwdriver. Take great care during this
operation to avoid damage to the motor.
By-pass regulation (part. 25 Fig. 1-34). If neces-
sary, the by-pass can be regulated according to
system requirements from a minimum (by-pass
excluded) to a maximum (by-pass inserted)
represented by the graphics (Fig. 1-33). Make
the regulation using a at head screwdriver, turn
clockwise and insert the by-pass, anti-clockwise
it is excluded.
A
B
C
D
Maior Eolo 24 4 E
Maior Eolo 28 4 E
Maior Eolo 32 4 E
A
A
B
B
C
C
D
D
Head (kPa)Head (kPa)
Head (m H2O)Head (m H2O)Head (m H2O)
Flow rate (l/h)
Flow rate (l/h)
Flow rate (l/h)
Head (kPa)

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Fig. 1- 34
Key:
1 - Sample points (air A) - (ue gas F)
2 - Sealed Chamber
3 - Fan
4 - Combustion chamber
5 - Domestic hot water ow switch
6 - Gas valve
7 - Domestic hot water probe
8 - System lling valve
9 - Positive signal pressure point
10 - Negative signal pressure point
11 - Flue pressure switch
12 - Delivery probe
13 - Flue hood
14 - Safety thermostat
15 - Primary heat exchanger
16 - Ignition and detection electrodes
17 - System expansion vessel
18 - Aqua Celeris
19 - Burner
1.17 KITS AVAILABLE ON REQUEST.
• System shut o valves kit. e boiler is designed
for installation of system interception cocks
to be placed on ow and return pipes of the
connection assembly. is kit is particularly
useful for maintenance as it allows the boiler to
be drained separately without having to empty
the entire system.
• System zone control unit Kit. If the central he-
ating system is to be divided into several zones
(max. three) in order to interlock them with
separate adjustments and to keep water ow
rate high for each zone, Immergas supplies zone
system kits on request.
• Polyphosphate dispenser kit. e polyphosphate
dispenser reduces the formation of lime-scale
and preserves the original heat exchange and
domestic hot water production conditions.
e boiler is prepared for application of the
polyphosphate dispenser kit.
• Cover kit. For outdoor installations, in partially
protected areas and with direct air intake, the
top protection cover must be tted for a correct
functioning of the boiler and to protect it from
storms (Fig. 1-8). For indoor installations, type
B conguration, a suitable top protection cover
coupled with the ue exhaust kit must be tted.
• Anti freeze kit with resistance (on request). If
the boiler is installed in a place where the tem-
perature falls below -5°C and in the event there
is no gas, the appliance can freeze. To prevent
freezing of the domestic hot water system, an
anti freeze kit with an electrical resistance can be
tted from the relative cable and from a control
thermostat.
e above-mentioned kits are supplied complete
with instructions for assembly and use.
1.18 BOILER COMPONENTS.
20 - System pressure switch
21 - Vent valve
22 - Boiler pump
23 - Plate heat exchanger
24 - ree-way valve (motorised)
25 - System draining valve
26 - By-pass
27 - 3 bar safety valve
N.B.: connection group (optional)

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2.3 CONTROL PANEL.
Fig. 2-1
Key:
1 - Central heating temperature selector
2 - Domestic hot water temperature selec-
tor
3 - On/Stand-by/O Button
4 - Summer/Winter Button
5 - Reset button
6 - Boost Button for Aqua Celeris activa-
tion
7 - Functioning in summer mode
8 - Boiler in Stand-by mode
9 - Functioning in winter mode
10 - Boiler in block does not require release
via “RESET” button
11 - Flame presence symbol and relative
power scale
12 - Functioning room central heating phase
active
13 - Solar function active
14 - Presence of anomalies
15 - Chimney sweep function in progress
16 - Functioning production phase active
17 - Domestic hot water temperature set
18 - Boiler connected to remote controlV2
(optional)
19 - Functioning with external temperature
probe active (optional)
20 - Aqua Celeris Function active
21 - Central heating temperature set
22 - Boiler manometer
2  USER INSTRUCTIONS FOR USE
AND MAINTENANCE
2.1 CLEANING AND MAINTENANCE.
Important: the heating systems must undergo
periodical maintenance (regarding this, see the
section dedicated to the technician, relative to
“yearly control and maintenance of the applian-
ce”) and regular checks of energy efficiency
in compliance with national, regional or local
provisions in force. is ensures that the optimal
safety, performance and operation characteristics
of the boiler remain unchanged over time.
We recommend stipulating a yearly cleaning and
maintenance contract with your zone technician.
2.2 GENERAL WARNINGS.
Never expose the wall-mounted boiler to direct
vapours from a cooking surface.
Use of the boiler by unskilled persons or children
is strictly prohibited.
Do not touch the ue gas exhaust terminal (if pre-
sent) due to the high temperatures it can reach;
For safety purposes, check that the concentric
air intake/flue exhaust terminal (if fitted), is
not blocked.
If temporary shutdown of the boiler is required,
proceed as follows:
a) drain the water system if anti-freeze is not
used;
b) shut-o all electrical, water and gas supplies.
In the case of work or maintenance to structures
located in the vicinity of ducting or devices for ue
extraction and relative accessories, switch o the
appliance and on completion of operations ensure
that a qualied technician checks eciency of the
ducting or other devices.
Never clean the appliance or connected parts
with easily ammable substances.
Never leave containers or ammable substances
in the same environment as the appliance.
• Attention: the use of components that employ
electrical power requires some fundamental
rules to be observed:
- do not touch the appliance with wet or moist
parts of the body; do not touch when barefoot;
- never pull electrical cables or leave the ap-
pliance exposed to atmospheric agents (rain,
sunlight, etc.);
- the appliance power cable must not be replaced
by the user;
- in the event of damage to the cable, switch o
the appliance and contact exclusively qualied
sta for replacement;
- if the appliance is not to be used for a certain
period, disconnect the main power switch.

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2.4 USING THE BOILER.
Before ignition, make sure the heating system
is lled with water and that the manometer (2)
indicates a pressure of 1 ÷ 1.2 bar.
- Open the gas cock upstream from the boiler.
- Press the button (3) until the display switches
on. At this point, the boiler goes to the state
previous to switch-o (O).
- If the boiler is in stand-by, press the button (3)
again to activate it. If this is not the case, go to
the next point.
- Press key (4) in sequence and select the summer
( ) or winter ( ) position of the boiler..
• Summer ( ): in this mode the boiler fun-
ctions only to produce the DHW, the tempe-
rature is set via the selector (2) and the relative
temperature is shown on the display via the
indicator (17).
During a request for DHW the indicator (16)
switches on. On ignition of the burner, the a-
me presence indicator (11) with relative power
scale switches on and indicator (17) shows the
instant output temperature from the primary
heat exchanger.
• Winter ( ): in this mode the boiler fun-
ctions both for producing domestic hot water
and heating the environment. e temperature
of the DHW is always regulated via the selector
(2), the heating temperature is regulated via
selector (1) and the relative temperature is
shown on the display via the indicator (21).
During a request for CH the indicator (12)
switches on. On ignition of the burner, the a-
me presence indicator (11) with relative power
scale switches on and indicator (21) shows the
instant output temperature from the primary
heat exchanger. In the central heating phase, if
the temperature of the water contained in the
system is sucient to heat the radiators, the
boiler can only function with the activation of
the boiler pump (indicator 12 on).
From this moment the boiler functions auto-
matically. With no demand for heat (heating
or domestic hot water production) the boiler
goes to “standby” function, equivalent to the
boiler being powered without presence of ame.
Each time the burner ignites, the relative ame
present symbol is displayed (11) with relative
power scale.
• Operation with Comando Amico Remoto
remote controlV2 (CARV2) (Optional). If the
CARV2 is connected, the ( ), symbol will
appear on the display. e boiler regulation pa-
rameters can be set via the CARV2 control panel
and the reset button (5) remains active on the
boiler control panel, along with the switch-o
button (3) (“o” mode only) and the display
where the functioning state is shown.
Important: if the boiler is put into “o” mode
on the CARV2 the “CON” connection error
symbol will appear on the CAR. e CARV2 is
however powered constantly so as not to loose
memorised programs.
• Solar functioning ( ). This function is
activated automatically id the boiler detects a
probe on the DHW inlet or if the “Solar ignition
delay” parameter is more than 0 seconds.
During a withdrawal, if the outlet water is hot
enough, the boiler doe not switch on, the DHW
withdrawal symbol ( ) appears on the
display along with the ashing solar function
symbol ( ).
When the water supplied by the solar system
is at a temperature lower than that at which
the boiler is set, the boiler switches on. At this
point, the solar function symbol will stay on
without ashing.
• Aqua Celeris Function ( ). By pressing
button “BOOST (6)” the Aqua Celeris function
is activated, which is marked by the switch-on
of the symbol (20) on the display. e enabled
function keeps the water contained in the
minim storage tank always hot, thus guaran-
teeing an almost instantaneous distribution of
domestic hot water.
• Functioning with optional external probe
( ). In the case of a system with optional
external probe, the boiler ow temperature
for room central heating is managed by the
external probe depending on the external
temperature measured (Par. 1.6). The flow
temperature can be modied by selecting the
functioning curve via selector (1), selecting a
value from “0 to 9” (Fig. 1-8).
With external probe present, the relative
symbol will appear on the display (19). In the
central heating phase, if the temperature of the
water contained in the system is sucient to
heat the radiators, the boiler can only function
with the activation of the pump.
• “Stand-by” mode. Press button (3) until the
( ), ymbol appears. The boiler remains
active from this moment and the anti-freeze
function, pump anti-block function and 3-way
and signalling of any anomalies is guaranteed.
N.B.: in these conditions the boiler is conside-
red still live.
• “O” mode. By holding the button (3) down
for 8 seconds, the display switches-o and the
boiler is o completely. e safety functions are
not guaranteed in this mode.
N.B.: in these conditions the boiler is consi-
dered still live even if there are no functions
active.
• Display functioning. e display lights up
during the use of the control panel or if the
burner is ignited, aer 15 seconds inactivity, the
brightness drops until just the active symbols
are displayed. e lighting mode can be varied
via parameter P2 in the circuit board customi-
sation menu.
2.5 TROUBLESHOOTING.
In the event of an anomaly, it is signalled via the
ashing indicator (14) and ashing of the relative
error code (21) according to the following table.
Anomaly signalled Code displayed
(ashing)
No ignition block 01
Safety thermostat block
(over-temperature),
ame control anomaly
02
Fan anomaly 03
Flow probe anomaly 05
Domestic hot water probe
anomaly 06
Maximum N° of reset 08
Insucient system pressure 10
Flue pressure switch failure 11
Conguration error 15
Parasite ame 20
Push button control panel
anomaly 24
Insucient circulation 27
Loss of remote control commu-
nication. 31
Low power supply voltage 37
Loss of ame signal 38
Block due to loss of continuous
ame signal 43
Block for maximum time, partial
gas valve opening 44
Ignition block. e boiler ignites automatically
with each demand for room heating or hot
water production. If this does not occur within
10 seconds, the boiler goes into ignition block
(code 01). To eliminate “ignition block” the Reset
button (5) must be pressed. On commissioning
or aer extended inactivity it may be necessary
to eliminate the “ignition block”. If this pheno-
menon occurs frequently, contact a qualied
technician for assistance (e.g. Immergas Aer-
Sales Technical Assistance Service).
Overtemperature thermostat block. During
normal functioning, if a fault causes excessive
overheating internally, the boiler goes into over-
temperature block (code 02). Aer allowing to
cool, eliminate the “overtemperature block” by
pressing the Reset key (5). If this phenomenon
occurs frequently, contact a qualied technician
for assistance (e.g. Immergas Aer-Sales Tech-
nical Assistance Service).
Fan anomaly. is occurs if the fan is blocked
or if the intake or drain pipes are obstructed.
If normal conditions are restored the boiler
restarts without having to be reset. If this ano-
maly persists, contact a qualied technician for
assistance (e.g. Immergas Aer-Sales Technical
Assistance Service).
Delivery probe anomaly. If the board detects
an anomaly on the delivery probe (code 05), the
boiler will not start; contact a qualied technician
for assistance (e.g. Immergas Aer-Sales Techni-
cal Assistance Service).
Domestic hot water probe anomaly. If the board
detects an anomaly on the domestic hot water
NTC probe, the boiler signals the anomaly. In this
case the boiler continues to produce domestic
hot water but not with optimal performance.
Moreover, the DHW anti-freeze function is
prevented and an a

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Fig. 2-2
Maximum N° of reset. To eliminate any “ano-
maly” the Reset button (5) must be pressed. e
Anomaly can be reset 5 times consecutively,
aer which the function in inhibited for at least
one hour. One attempt is gained every hour for
a maximum of 5 attempts.
Insucient system pressure. Water pressure
inside the heating system (code 10), sucient to
guarantee the correct functioning of the boiler,
is not detected. Check that the system pressure
is between 1÷1.2 bar.
Flue gas pressure switch failure. It occurs in the
case of an error on the circuit board that gives
consent for fan start-up incorrectly or in the
case of ue-gas pressure switch fault (code11).
If normal conditions are restored the boiler
restarts without having to be reset. If this ano-
maly persists, contact a qualied technician for
assistance (e.g. Immergas Aer-Sales Technical
Assistance Service).
Conguration error. If the board detects an
anomaly or incongruency on the electric wiring,
the boiler will not start. If normal conditions are
restored the boiler restarts without having to be
reset. If this anomaly persists, contact a qualied
technician for assistance (e.g. Immergas Aer-
Sales Technical Assistance Service).
Parasite ame. is occurs in case of a leak on
the detection circuit or anomaly in the ame
control unit. (code 20), try to reset the boiler.
If the anomaly continues contact a qualified
technician (e.g. Immergas Aer-Sales Technical
Assistance Service).
Push button control panel anomaly. is occurs
when the circuit board detects an anomaly on the
push button control panel. If normal conditions
are restored the boiler restarts without having
to be reset. If this anomaly persists, contact a
qualied technician for assistance (e.g. Immergas
Aer-Sales Technical Assistance Service).
Insucient circulation. is occurs if the boiler
overheats due to insucient water circulating in
the primary circuit (code 27); the causes can be:
- low circulation; check that no interception
devices are closed on the central heating circuit
and that the system is free of air (deaerated);
- pump blocked; free the pump.
If this phenomenon occurs frequently, contact a
qualied technician for assistance (e.g. Immergas
Aer-Sales Technical Assistance Service).
Loss of Remote Control communication.
is occurs 1 minute aer communication loss
between the boiler and the remote control (code
31). To reset the error code, remove and re-apply
voltage to the boiler. If this phenomenon occurs
frequently, contact a qualied technician for
assistance (e.g. Immergas Aer-Sales Technical
Assistance Service).
Low power supply voltage. This occurs when
the power supply voltage is lower than the
allowed limits for the correct functioning of
the boiler. If normal conditions are restored,
the boiler re-starts without having to be reset.
If this phenomenon occurs frequently, con-
tact a qualified technician for assistance (e.g.
Immergas After-Sales Technical Assistance
Service).
Loss of flame signal. This occurs when the
boiler is ignited correctly and the burner flame
switches off unexpectedly; a new attempt at
ignition is performed and if normal conditions
are restored, the boiler does not have to be
reset. If this phenomenon occurs frequently,
contact a qualified technician for assistance
(e.g. Immergas After-Sales Technical Assi-
stance Service).
Block due to loss of continuous flame signal
This occurs if the “Flame signal loss” error
occurs 6 times consecutively in 8.5 minutes
(38)”. To eliminate the block, the Reset button
(5) must be pressed. If this phenomenon occurs
frequently, contact a qualified technician for
assistance (e.g. Immergas After-Sales Technical
Assistance Service).
Block for maximum time, gas valve opening.
is occurs if the gas valve remains open for
a time longer than that envisioned for normal
functioning, without the boiler switching on.
To eliminate the block, the Reset button (5)
must be pressed. If this phenomenon occurs
frequently, contact a qualied technician for
assistance (e.g. Immergas Aer-Sales Technical
Assistance Service).
2.6 BOILER SHUTDOWN
For complete boiler switch-o, press the “o”
button, disconnect the onmipolar switch outside
of the boiler and close the gas cock upstream
from the appliance. Never leave the boiler
switched on if le unused for prolonged periods.
2.7 RESTORE CENTRAL HEATING
SYSTEM PRESSURE.
Periodically check the system water pressure.
e boiler pressure gauge should read a pressure
between 1 and 1.2 bar.
If the pressure is below 1 bar (with the circuit cool)
restore normal pressure via the cock located in the
lower part of the boiler (Fig. 2-2).
N.B.: close the cock aer the operation.
If pressure values reach around 3 bar the safety
valve may be activated.
In this case contact a professional technician
for assistance.
In the event of frequent pressure drops, contact
qualified staff for assistance to eliminate the
possible system leakage.
2.8 SYSTEM DRAINING.
To drain the boiler, use the special draining
valve (Fig. 2-2)
Before draining, ensure that the lling valve is
closed.
2.9 ANTIFREEZE PROTECTION.
The boiler has an anti-freeze function that
switches on automatically when the temperature
falls below 4°C (standard protection to minimum
temperature of -5°C). In order to guarantee the
integrity of the appliance and the domestic hot
water heating system in zones where the tem-
perature falls below zero, we recommend the
central heating system is protected using anti-
freeze liquid and installation of the Immergas
Anti-freeze Kit in the boiler (Par. 1.3). In the
case of prolonged inactivity (second case), we
also recommend that:
- disconnect the electric power supply;
- the central heating circuit and boiler domestic
hot water circuit must be drained. In systems
that are drained frequently, lling must be car-
ried out with suitably treated water to eliminate
hardness that can cause lime-scale.
2.10 CASE CLEANING.
Use damp cloths and neutral detergent to clean
the boiler casing. Never use abrasive or powder
detergents.
2.11 DECOMMISSIONING.
In the event of permanent shutdown of the boiler,
contact professional sta for the procedures and
ensure that the electrical, water and gas supply
lines are shut o and disconnected.
BOTTOM VIEW
FILLING VALVE
DRAINING
VALVE

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3  TECHNICIAN BOILER
STARTUP
INITIAL CHECK
To commission the boiler:
- ensure that the declaration of conformity of
installation is supplied with the appliance;
- make sure that the type of gas used corresponds
to boiler settings;
- check connection to a 230V-50Hz power
mains, correct L-N polarity and the earthing
connection;
- make sure the central heating system is lled
with water and that the manometer indicates
a pressure of 1÷1.2 bar.
- make sure the air valve cap is open and that the
system is well deaerated;
- switch the boiler on and check correct ignition;
- make sure the gas maximum, intermediate
and minimum ow rate and pressure values
correspond to those given in the handbook,
(Par. 3.18);
- check activation of the safety device in the event
of no gas, as well as the relative activation time;
- check activation of the main switch located
upstream from the boiler;
- check that the intake and/or exhaust terminals
are not blocked;
- check activation of the “no air” safety pressure
switch;
- ensure activation of all adjustment devices;
- seal the gas ow rate regulation devices (if
settings are modied);
- check the production of domestic hot water;
3.1 HYDRAULIC DIAGRAM.
Fig. 3-1
- check sealing eciency of water circuits;
- check ventilation and/or aeration of the instal-
lation room where provided.
If any checks/inspection give negative results, do
not start the boiler.
Key:
1 - Domestic hot water ow switch
2 - System lling valve
3 - Flow limiter
4 - Domestic hot water probe
5 - Aqua Celeris Resistance
6 - Gas valve
7 - Aqua Celeris
8 - System expansion vessel
9 - Burner
10 - Primary heat exchanger
11 - Flue hood
12 - Sealed Chamber
13 - Flue pressure switch
14 - Fan
15 - Delivery probe
16 - Safety thermostat
17 - Vent valve
18 - Boiler pump
19 - System draining valve
20 - System pressure switch
21 - Plate heat exchanger
22 - ree-way valve (motorised)
23 - By-pass
24 - 3 bar safety valve
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic hot water inlet
R - System return
M - System ow

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3.2 WIRING DIAGRAM.
Fig. 3-2
Remote control: the boiler is set-up for the appli-
cation of the Comando Amico Remoto remote
controlV2 (CARV2) which must be connected
to clamps 41 and 44 of the X15 connector on
the P.C.B. respecting polarity and eliminating
jumper X40.
Room thermostat: the boiler is designed to use
the Room ermostat (S20). Connect it to clamps
40 – 41 eliminating jumper X40.
e X5 connector is also used for the connection
with three relay board (optional) by removing the
connection to the relay board.
e connector X6 is for connection to a personal
computer.
e connector X8 is used for soware updating
operations.
3.3 TROUBLESHOOTING.
N.B.: Maintenance must be carried out by a
qualied technician (e.g. Immergas Technical
Aer-Sales Assistance Service).
- Smell of gas. Caused by leakage from gas circuit
pipelines. Check sealing eciency of gas intake
circuit.
- e fan works but ignition discharge does not
occur on the burner ramp. e fan may start
but the safety air pressure switch does not
switch the contact over. Make sure:
1) the intake/exhaust duct is not too long (over
allowed length).
2) the intake/exhaust duct is not partially blo-
cked (on the exhaust or intake side).
3) the diaphragm of the ue exhaust is adequate
for the length of the intake-exhaust duct.
4) that the sealed chamber is kept in good con-
ditions.
5) the fan power supply voltage is not less than
196 V.
- Irregular combustion (red or yellow ame).
is may be caused by: dirty burner, incorrect
combustion parameters, intake - exhaust ter-
minal not correctly installed. Clean the above
components and ensure correct installation of
the terminal.
- Frequent interventions of the over heating
safety thermostat. It can depend on reduced
water pressure in the boiler, little circulation
in the heating system, the blocked pump or
an anomaly of the boiler P.C.B. Check on the
manometer that the system pressure is within
established limits. Check that radiator valves
are not all closed.
- Presence of air in the system. Check ope-
ning of the hood of the special air vent valve
(Fig.1-34). Make sure the system pressure and
expansion vessel pre-charge values are within
the set limits; the factory-set pressure value
for the expansion vessel must be 1.0 bar, and
system pressure between 1 and 1.2 bar.
- Ignition block see par. 2.5 and 1.4 (electric
connection).
6 7 7
10
5
6
7
1
2
11
4
3
7
8
6
9
6
7
6
12
8
12
8
11
11
8 8
11 13 13 14 14 15 15 14 14
8 8
6
7
Key:
A9 - P.C.B. to a relay
B1 - Flow probe
B2 - Domestic hot water probe
B4 - External probe (optional)
B9 - DHW inlet probe (optional)
CARV2 - Comando Amico Remoto remote control Version 2
(optional)
DS1 - Display
E3 - Ignition and detection electrodes
E4 - Safety thermostat
E11 - Aqua Celeris Resistance
F1 - Phase fuse
M1 - Boiler pump
M20 - Fan
M30 - ree-way valve
R5 - Domestic hot water temperature
trimmer
R6 - Central heating temperature
trimmer
S2 - Selector switch functioning
S3 - Reset block keys
S4 - Domestic hot water ow switch
S5 - System pressure switch
S6 - Flue gas pressure switch
S20 - Room thermostat (optional)
S32 - Boost Button (Aqua Celeris activation)
S31 - On/Stand-by/O Button
T1 - Switch-on transformer
T2 - Boiler board transformer
X40 - Room thermostat jumper
Y1 - Gas valve
Y2 - Gas valve modulator
U1 - Rectier inside the gas valve
connector (Only available on Ho-
neywell gas valves)
1 - Anti-freeze kit (optional)
2 - 230 Vac 50 Hz power supply
3 - N.B.: e user interface is on the
welding side of the boiler board
4 - Zones control unit (optional)
5 - Yellow/Green
6 - Brown
7 - Blue
8 - Black
9 - Domestic hot water
10 - Central heating
11 - Red
12 - Orange
13 - White
14 - Grey
15 - Green

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3.5 PROGRAMMING THE P.C.B.
e boiler is prepared for possible programming of
several operation parameters. By modifying these
parameters as described below, the boiler can be
adapted according to specic needs.
To access the programming phase, press the
“Summer/Winter” (4) and “Reset” (5) buttons
simultaneously for 8 seconds.
once the menu has been accessed, it is possible
to scroll through the three sub-manus present
(s, p, t) by pressing the “Summer/Winter” (4)
button for 2 seconds.
Id
Parameter
(ref. 17)
Parameter Description Range
(ref. 21 Fig. 2-1)
Default
S0 Minimum CH
output
e boiler also has electronic modulation that adapts the boiler potentiality to the eective
heating demand of the house. en the boiler works normally in a variable gas pressure
eld between the minimum heating power and the maximum heating power depending
on the system’s heating load.
N.B.: the boiler is produced and calibrated in the central heating phase at nominal output.
Approximately 10 minutes are needed to reach the nominal heat output changeable using
parameter (S1).
N.B.: the selection of the “Minimum heating power” and “Maximum heating power”
parameters, in the presence of a heating request, allows switch-on of the boiler and po-
wer supply of the modulator with current equal to the value of the respective set value.
0 - 60 % 35
S1 Maximum CH
output 0 - 99 % 99
S2 Gas type selec-
tion
e setting of this function is used to adjust the boiler in order to function with the
correct type of gas
nG - Methane
lG - LPG
Ci - China
e same
as the type
of gas being
used
S3 Boiler type
Establishes the boiler type and its functioning mode
0 = combi
1 = 24 kW storage tank
2 = 28 kW storage tank
3 = 32kW storage tank
0 - 3 0
S4 Ignition
power Establishes the power at which the boiler must switch on 0 - 50 % 30
Use the “DHW regulator” selector (2), to select
the parameter and rotate the “CH regulator”
(1) to modify the value according to the range
available.
With the menu active on the indicator (17) the
parameter n° is displayed while indicator (21)
displays the parameter value.
Press the “Reset” button (5) for 2 seconds to
memorise the variation of the parameters
Memorisation is displayed by the ashing indi-
cators (17 and 21).
Exit the programming phase by waiting for
2minutes or by pressing the, press the “Summer/
Winter” (4) and “Reset” (5) buttons simultaneou-
sly for 5 seconds.
3.4 INFORMATION MENU.
Pressing the “Summer/Winter” button (4) for 4
seconds, the “Information menu” is activated,
which allows to display some boiler functioning
parameters.
Press the “Reset” button (5) to scroll the various
parameters.
To exit the menu, press the “Summer/Winter”
button (4) again for 4 seconds or wait for 120
seconds.
With the menu active on the indicator (17) the
parameter n° is displayed while indicator (21)
displays the parameter value.
Id
Parameter
(ref. 17)
Description
d1 Displays the ame signal (uA)
d2 Displays the primary exchanger output instant heating ow temperature
d3 Displays the instant output temperature from the DHW exchanger
d4 Displays the temperature set for the central heating set (if remote control is present)
d5 Displays the temperature set for the DHW set (if remote control is present)
d6
Displays the external temperature
(if external probe present)
If the temperature is below zero, the value is displayed ashing.
d7 Display the temperature of the inlet DHW.