Victrix Zeus 25

Instructions and
recommendations
IE VICTRIX ZEUS
Installer 25
User
Maintenance technician
*1.042022ENG*
INDEX
Dear Customer,.................................................................................. 3 2.7 Boiler shutdown.................................................................. 40
General recommendations............................................................... 3 2.8 Restore central heating system pressure.......................... 40
Safety symbols used........................................................................... 5 2.9 Draining the system........................................................... 40
Personal protective equipment........................................................ 5 2.10 Draining the domestic hot water circuit.......................... 40
2.11 Storage tank draining......................................................... 41
1 Boiler installation................................................................. 6 2.12 Antifreeze protection......................................................... 41
1.1 Installation recommendations............................................ 6 2.13 Cleaning the case................................................................ 41
1.2 Main dimensions.................................................................. 9 2.14 Decommissioning............................................................... 41
1.3 Minimum installation distances......................................... 9 2.15 Gas system not used for periods over 12 months........... 41
1.4 Antifreeze protection......................................................... 10
1.5 Boiler connection unit....................................................... 11 3 Instructions for maintenance and initial check.............. 42
1.6 Gas connection................................................................... 11 3.1 General warnings................................................................ 42
1.7 Hydraulic connection......................................................... 12 3.2 Initial check......................................................................... 42
1.8 Electrical connection.......................................................... 13 3.3 Yearly appliance check and maintenance........................ 43
1.9 Remote controls and room chrono-thermostats 3.4 Hydraulic Diagram............................................................. 44
(Optional)............................................................................ 13 3.5 Wiring diagram................................................................... 45
1.10 External temperature probe (Optional)........................... 14 3.6 Removable memory........................................................... 46
1.11 Immergas flue systems....................................................... 15 3.7 Troubleshooting.................................................................. 46
1.12 Tables of resistance factors and equivalent lengths of 3.8 Converting the boiler to other types of gas..................... 47
“green range” flue system components............................ 16 3.9 Checks following conversion to another type of gas...... 47
1.13 Outdoor installation in partially protected area............. 18 3.10 Calibration type involving the replacement of a
1.14 Concentric horizontal kit installation.............................. 20 component........................................................................... 48
1.15 Concentric vertical Kit installation.................................. 21 3.11 Complete calibration function.......................................... 48
1.16 Separator kit installation.................................................... 22 3.12 CO2 adjustment.................................................................. 49
1.17 Adaptor C9 kit installation................................................ 24 3.13 Fast calibration.................................................................... 49
1.18 Ducting of flues or technical slots.................................... 26 3.14 Flue test................................................................................ 50
1.19 Configuration type B, open chamber and fan assisted for 3.15 Programming the P.C.B..................................................... 50
indoors................................................................................. 26 3.16 "Chimney sweep” function................................................ 54
1.20 Flue exhaust to flue/chimney............................................ 27 3.17 Pump anti-block function................................................. 54
1.21 Flues, chimneys and chimney caps.................................. 27 3.18 Three-way anti-block system............................................ 54
1.22 Water treatment system filling.......................................... 28 3.19 Radiators antifreeze function............................................ 54
1.23 System filling....................................................................... 28 3.20 Periodical P.C.B. self-check............................................... 54
1.24 Filling the condensate drain trap...................................... 28 3.21 Automatic vent function.................................................... 54
1.25 Gas system start-up............................................................ 28 3.22 Casing removal................................................................... 55
1.26 Boiler start-up (Ignition)................................................... 29
1.27 Circulation pump................................................................ 30 4 Technical data..................................................................... 57
1.28 Kits available on request.................................................... 31 4.1 Variable heat output........................................................... 57
1.29 Boiler components.............................................................. 32 4.2 Combustion parameters.................................................... 57
4.3 Technical data table............................................................ 58
2 Instructions for use and maintenance.............................. 33 4.4 Key for Data nameplate..................................................... 59
2.1 General warnings................................................................ 33 4.5 Technical parameters for combination boilers
2.2 Cleaning and maintenance................................................ 35 (in compliance with Regulation 813/2013)..................... 60
2.3 Control panel....................................................................... 35 4.6 Product fiche
2.4 Using the boiler................................................................... 36 (in compliance with Regulation 811/2013)..................... 61
2.5 Fault and anomaly signals................................................. 37 4.7 Parameters for filling in the package fiche...................... 62
2.6 Information Menu.............................................................. 40
3
Dear Customer,
Our compliments for having chosen a top-quality Immergas product, able to ensure well-being and safety for a long period of time. As an
Immergas Customer, you can also count on a qualified after-sales service, prepared and updated to guarantee constant efficiency of your
boiler. Read the following pages carefully: you will be able to draw useful tips on the correct use of the device, compliance of which will
confirm your satisfaction with the Immergas product.
For assistance and routine maintenance, contact Authorised Immergas Service Centres: they have original spare parts and are specifically
trained directly by the manufacturer.
GENERAL RECOMMENDATIONS
This book contains important information for the:
Installer (section 1);
User (section 2);
Maintenance Technician (section 3).
• The user must carefully read the instructions in the specific section (section 2).
• The user must limit operations on the appliance only to those explicitly allowed in the specific section.
• The appliance must be installed by qualified and professionally trained personnel.
• The instruction booklet is an integral and essential part of the product and must be given to the new user in the case of transfer or
succession of ownership.
• It must be stored with care and consulted carefully, as all of the warnings provide important safety indications for installation, use
and maintenance stages.
• In compliance with the legislation in force, the systems must be designed by qualified professionals, within the dimensional limits
established by the Law. Installation and maintenance must be performed in compliance with the regulations in force, according to
the manufacturer's instructions and by professionally qualified staff, meaning staff with specific technical skills in the plant sector,
as provided for by Law.
• Improper installation or assembly of the Immergas device and/or components, accessories, kits and devices can cause unexpected
problems for people, animals and objects. Read the instructions provided with the product carefully to ensure proper installation.
• This instructions manual provides technical information for installing Immergas products. As for the other issues related to the
installation of products (e.g. safety at the workplace, environmental protection, accident prevention), it is necessary to comply with
the provisions of the standards in force and the principles of good practice.
• All Immergas products are protected with suitable transport packaging.
• The material must be stored in a dry place protected from the weather.
• Damaged products must not be installed.
• Maintenance must be carried out by skilled technical staff. For example, the Authorised Immergas Service Centre that represents a
guarantee of qualifications and professionalism.
• The device must only be destined for the use for which it has been expressly declared. Any other use will be considered improper
and therefore potentially dangerous.
• If errors occur during installation, operation and maintenance, due to non-compliance with technical laws in force, standards or
instructions contained in this booklet (or however supplied by the manufacturer), the manufacturer is excluded from any contractual
and extra-contractual liability for any damages and the device warranty is invalidated.
The company IMMERGAS S.p.A., with registered office in via Cisa Ligure 95 42041 Brescello (RE), declares that the design, manu-
facturing and after-sales assistance processes comply with the requirements of standard UNI EN ISO 9001:2015.
For further details on the product CE marking, request a copy of the Declaration of Conformity from the manufacturer, specifying the
appliance model and the language of the country.
The manufacturer declines all liability due to printing or transcription errors, reserving the right to make any modifications to its
technical and commercial documents without forewarning.
4
SAFETY SYMBOLS USED.
GENERIC HAZARD
Strictly follow all of the indications next to the pictogram. Failure to follow the indications can generate hazard situa-
tions resulting in possible harm to the health of the operator and user in general.
ELECTRICAL HAZARD
Strictly follow all of the indications next to the pictogram. The symbol indicates the appliance’s electrical components
or, in this manual, identifies actions that can cause an electrical hazard.
MOVING PARTS
The symbol indicates the appliance’s moving components that can cause hazards.
HOT SURFACES
The symbol indicates the appliance’s very hot components that can cause burns.
SHARP SURFACES
The symbol indicates the appliance’s components or parts that can cause cuts if touched.
EARTH TERMINAL CONNECTION

The symbol identifies the appliance’s earth terminal connection point.
READ AND UNDERSTAND THE INSTRUCTIONS

Read and understand the appliance’s instructions before performing any operation, carefully following the indications
provided.
INFORMATION
Indicates useful tips or additional information.
RECOVERABLE OR RECYCLABLE MATERIAL
The user must not dispose of the appliance at the end of its service life as municipal waste, but send it to appropri-
ate collection centres.
PERSONAL PROTECTIVE EQUIPMENT.
SAFETY GLOVES
SAFETY GOGGLES
SAFETY FOOTWEAR
5
1 BOILER INSTALLATION.

1.1 INSTALLATION RECOMMENDATIONS.
ATTENTION:
INSTALLER
operators who install and service the

appliance must wear the personal pro-
tective equipment required by applica-
ble law.
SI
YES NO 1
The Victrix Zeus 25 boiler has been designed for wall ATTENTION:
mounted installation only; for heating and production
of domestic hot water for domestic use and similar
it is not permitted to install boilers that
purposes. are removed and decommissioned from
The place of installation of the appliance and relative other systems. The manufacturer declines all
Immergas accessories must have suitable features
liability for damages caused by boilers removed
USER
(technical and structural), such as to allow for (always in safe,

efficient and comfortable conditions): from other systems or for any non-conformities
- installation (according to the provisions of technical legislation of such equipment.
and technical regulations);
- maintenance operations (including scheduled, periodic, rou- ATTENTION:
tine and special maintenance); check the environmental operating
- removal (to outdoors in the place for loading and transporting conditions of all parts relevant to in-
the appliances and components) as well as the eventual replace-
ment of those with appliances and/or equivalent components. stallation, referring to the values shown in the
technical data table in this booklet.
MAINTENANCE TECHNICIAN
The wall surface must be smooth, without any protrusions or

recesses enabling access to the rear part. They are not designed
to be installed on plinths or floors (Fig. 1).
By varying the type of installation the classification of the boiler
ATTENTION:
also varies, precisely:
Installation of the Victrix Zeus 25 boiler
- Type B23 or B53 boiler if installed using the relevant terminal
for air intake directly from the room in which the boiler has when powered by LPG must comply with
been installed. the rules regarding gases with a greater density
- Type C boiler if installed using concentric pipes or other types than air (remember, as an example, that it is
of pipes envisioned for the sealed chamber boiler for intake of prohibited to install plants powered with the
air and expulsion of flue gas.
above-mentioned gas in rooms where the floor
Only professionally enabled companies are authorised to install
Immergas gas appliances. is at a lower quota than the country level).
Installation must be carried out according to regulation stand-
ards, current legislation and in compliance with local technical
regulations and the required technical procedures.
ATTENTION:
if installing a kit or servicing the ap-
pliance, always empty the system’s
domestic hot water circuit first so as not to
compromise the appliance’s electrical safety
(see Par. 2.9 and 2.10).
6
Before installing the appliance, ensure that it is de- Installation Standards:
livered in perfect condition; if in doubt, contact the
supplier immediately. Packing materials (staples, nails, - this boiler can be installed outdoors in
plastic bags, polystyrene foam, etc.) constitute a hazard a partially protected area. A partially
and must be kept out of the reach of children. protected area is one in which the boiler is
INSTALLER
If the appliance is installed inside or between cabinets, not exposed to the direct action of the weather
ensure sufficient space for normal servicing; therefore it is
advisable to leave clearance of at least 3 cm between the boiler
(rain, snow, hail, etc.).
casing and the vertical sides of the cabinet. Leave adequate This type of installation is only possible when
space above the boiler for possible water and flue removal permitted by the laws in force in the appliance's
connections (Fig. 3).
country of destination.
- Installation of gas appliances, flue exhaust
It is just as important that the intake grids and exhaust pipes and combustion air intake pipes is for-
terminals are not obstructed. bidden in places with a fire risk (for example:
It is recommended to check that no flue gas recircula- garages, closed parking stalls), and in poten-
tion is found in the air sample points (0.5% maximum tially dangerous places.
permitted CO2).
Keep all flammable objects away from the appliance
USER
(paper, rags, plastic, polystyrene, etc.).
The minimum distance for exhaust pipes from flam-
mable materials must be at least 25 cm.
Do not place household appliances underneath the boiler as they - Installation is prohibited on the verti-
could be damaged if the safety valve intervenes, if the drain trap
cal projection of the cooking surface.
is blocked, or if there are leaks from the hydraulic connections;
otherwise, the manufacturer cannot be held responsible for any - Installation is forbidden in places/
damage caused to the household appliances. rooms that constitute public areas of apart-
For the aforementioned reasons, we recommend not placing ment buildings, internal stairways or other
furnishings, furniture, etc. under the boiler.
escape routes (e.g. floor landings, entrance
In the event of malfunctions, faults or incorrect operation,
turn the appliance off immediately and contact an authorised
halls, etc.).
company (e.g. the Immergas Technical Assistance centre, which - Installation is also forbidden in places/rooms
has specifically trained staff and original spare parts). Do not that constitute public areas of apartment
attempt to modify or repair the appliance alone.
Any modification to the appliance that is not explicitly indicated buildings such as cellars, entrance halls, at-
in this section of the booklet is forbidden. tics, lofts, etc., unless otherwise provided for
by local regulations in force.
- These boilers are not suitable for installation
on walls made of combustible material.
N.B.: wall mounting of the boiler must guarantee

stable and efficient support for the boiler. The plugs
(standard supply) are only to be used to fix the boiler
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.
7
These boilers are used to heat water to below boiling ATTENTION:
temperature in atmospheric pressure.
They must be connected to a central heating system
- Type B open chamber boilers must
and domestic hot water circuit suited to their perfor- not be installed in places where com-
mance and capacity. mercial, artisan or industrial activities take
INSTALLER
place, which use products that may develop

Risk of damage due to corrosion caused by unsuitable volatile vapours or substances (e.g. acid va-
combustion air and environment. pours, glues, paints, solvents, combustibles,
Spray, solvents, chlorine-based detergents, paints, glue, etc.), as well as dusts (e.g. dust deriving from
ammonium compounds, powders and similar cause the working of wood, coal fines, cement, etc.),
product and flue duct corrosion.
which may be damaging for the components
- Check that combustion air power supply is free from
chlorine, sulphur, powders, etc. of the appliance and jeopardise functioning.
- Make sure that no chemical substances are stored in the place - Unless otherwise provided for by local regula-
of installation. tions in force, configurations B23 and B53: the
- If you want to install the product in beauty salons, paint boilers must not be installed in bedrooms,
workshops, carpenter’s shop, cleaning companies or
similar, choose a separate installation area that ensures bathrooms or bedsits. They must neither be
combustion air supply that is free from chemical substances. installed in rooms containing solid fuel heat
USER
- Make sure the combustion air is not fed from chimneys that were generators nor in rooms communicating with
used with gas boilers or other heating devices. In fact, these may said rooms.
cause an accumulation of soot in the chimney.
- The installation rooms must be permanently
ventilated, in compliance with the local regu-
lations in force (at least 6 cm2 for every kW
of installed heat input, except in the event of
Risk of material damage after using sprays and liquids
to search for leaks
any increases needed for electro-mechanical
Leak sprays and liquids clog the reference hole P.Ref vacuum cleaners or other devices that could
(Part. 5 Fig. 37) of the gas valve, damaging it irreparably. put the installation room under vacuum).
During installation and maintenance, do not use spray - Installation of appliances in B23 and B53 con-
or liquids in the upper area of the gas valve (side referring to the
electric connections)
figuration is recommended in non-residential
premises and which are permanently ventilated.
Filling the condensate drain trap.

On first lighting of the boiler, flue gas may
come out the condensate drain; after a
few minutes’ operation check that this no longer
occurs. This means that the trap is filled with ATTENTION:
condensate to the correct level preventing the Failure to comply with the above implies
passage of combustion products. personal responsibility and invalidates
the warranty.
8
1.2 MAIN DIMENSIONS.
Key:
INSTALLER
V - Electrical connection
G - Gas supply
SC - Condensate drain (minimum
internal diameter Ø 13 mm)
R - System return
M - System flow
RC - Domestic hot water pump
(optional)
AC - Domestic hot water outlet
AF - Domestic hot water inlet
Height Width Depth

(mm) (mm) (mm)
900 580 410
TEMPLATE CONNECTIONS
DOMESTIC
USER
GAS HOT SYSTEM
WATER
G AC AF R M
1/2” 1/2” 1/2” 3/4” 3/4”
1.3 MINIMUM INSTALLATION DISTANCES.
Key:
A - 450 mm
B - 350 mm
C - 30 mm
D - 30 mm
E - 350 mm
9
1.4 ANTIFREEZE PROTECTION.
Minimum temperature -15°C. If the boiler is installed
in a place where the temperature drops below 0°C, the
appliance can freeze.
To prevent the risk of freezing follow the instructions
INSTALLER
below:
- protect the central heating circuit from freezing by inserting a
good-quality antifreeze liquid into this circuit, which is special-
ly suited for central heating systems and which is manufacturer
guaranteed not to cause damage to the heat exchanger or other
components of the boiler. The antifreeze liquid must not be
harmful to one's health. The instructions of the manufacturer
of this liquid must be followed scrupulously regarding the per-
centage necessary with respect to the minimum temperature
at which the system must be kept.
N.B.: the excessive use of glycol could jeopardise the proper
functioning of the appliance.
An aqueous solution must be made with potential pollution
class of water 2 (EN 1717:2002).
The materials used for the central heating circuit of Immergas
boilers resist ethylene and propylene glycol based antifreeze
USER
liquids (if the mixtures are prepared perfectly).

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 (antifreeze kit) com-
prising two electric heating elements, the relevant wiring and a
control thermostat (carefully read the installation instructions
contained in the accessory kit pack).
In these conditions the boiler is protected against freezing to
temperature of -15°C.
Boiler antifreeze protection (both -5°C and -15°C) is thus en-

sured only if:
- the boiler is correctly connected to gas and electricity power
supply circuits;
- the boiler is powered constantly;
- the boiler is not in “off ” mode;
- the boiler is not in anomaly conditions (Par. 2.5);
- the essential components of the boiler and/or antifreeze kit are
not faulty.
The warranty does not cover damage due to interruption of the
electrical power supply and failure to comply with that stated
on the previous page.
Note: if the boiler is installed in places where the temperature
falls below 0°C the domestic hot water and central heating
attachment pipes and the condensate drain pipe must be
insulated.
Note: the antifreeze systems described in this chapter are
only to protect the boiler. The presence of these functions and
devices does not exclude the possibility of parts of the system
or domestic hot water circuit outside the boiler from freezing.
10
1.5 BOILER CONNECTION UNIT.
The connection unit consisting of all the necessary parts to per- According to local regulations in force,
form the hydraulic and gas system connections of the appliance make sure that a gas cock is installed
comes as a standard supply. Perform the connections respecting upstream of each connection between
the layout of (Fig. 4) based on the type of installation to be made.
the appliance and the gas system. This cock,
INSTALLER
1.6 GAS CONNECTION. if supplied by the appliance’s manufacturer,
Our boilers are designed to operate with methane gas (G20) and can be directly connected to the appliance
L.P.G. Supply pipes must be the same as or larger than the 3/4”G
(i.e. downstream from the pipes connecting
boiler fitting.
the system to the appliance), according to the
ATTENTION: manufacturer’s instructions.
Before connecting the gas line, carefully The Immergas connection unit, which is a
clean inside all the fuel feed system pipes standard supply, also includes the gas cock,
to remove any residue that could impair boiler whose installation instructions are provided
efficiency. Also make sure the gas corresponds in the kit.
to that for which the boiler is prepared (see In any case, make sure the gas cock is con-
boiler data nameplate). If different, the boiler nected properly.
must be converted for operation with the other
type of gas (see converting appliance for other
USER
The gas supply pipe must be suitably dimensioned according to
gas types). It is also important to check the dy- current regulations in order to guarantee correct gas flow rate to
namic pressure of the mains (methane or LPG) the burner even in conditions of maximum generator output and
used to supply the boiler, which must comply to guarantee appliance efficiency (technical specifications). The
coupling system must conform to standards in force (EN 1775).
with EN 437 and its attachment, as insufficient
levels may reduce generator output and cause ATTENTION:
discomfort to the user. the appliance is designed to operate with
fuel gas free from impurities; otherwise
it is advisable to fit special filters upstream of
the appliance to restore the purity of the fuel.
The kit includes:

N°2 - 3/4” telescopic fittings (R-M)
N°1 - 1/2” telescopic fitting (AC)
N°1 - 1/2” gas cock (G)
N°1 - 1/2” ball valve (AF)
N°2 - Ø18 copper bends
N°2 - Ø14 copper bends
N°1 - Pipe Ø 18
N°2 - adjustable expansion bolts
N°2 - boiler support hooks
Gaskets and seal O-Ring
R
G SC Key:
V M
RC V - Electrical connection 230V-50Hz
AC G - 1/2” gas supply
AF SC - Condensate draining
R - 3/4” system return
M - 3/4” System flow
RC - 1/2” domestic hot water recirculation
AC - 1/2” domestic hot water outlet CAVO
POWER
AF - 1/2” domestic hot water inlet ALIMENTAZIONE
CABLE
4 5
11
Storage tanks (in case of supply from LPG depot).
- New LPG storage tanks may contain residual inert gases (nitro- ATTENTION:
gen) that degrade the mixture delivered to the appliance casing the manufacturer declines all liability
functioning anomalies.
in the event of damage caused by the
- Due to the composition of the LPG mixture, layering of the
installation of an automatic filling system.
INSTALLER
mixture components may occur during the period of storage in

the tanks. This can cause a variation in the calorific value of the
In order to meet the system requirements established by EN 1717
mixture delivered to the appliance, with subsequent change in
in terms of pollution of drinking water, we recommend installing
its performance.
the IMMERGAS anti-backflow kit to be used upstream of the cold
water inlet connection of the boiler. We also recommend using a
1.7 HYDRAULIC CONNECTION. category 1, 2 or 3 heat transfer fluid (ex: water + glycol) in the boil-
In order not to void the condensation module war- er's primary circuit (C.H. circuit), as defined in standard EN 1717.
ranty before making the boiler connections, carefully To preserve the duration of appliance efficiency fea-
clean the heating system (pipes, radiators, etc.) with tures, in the presence of water whose features can
special pickling or descaling products to remove lead to the deposit of lime scale, installation of the
any deposits that could compromise correct boiler “polyphosphate dispenser” kit is recommended .
operation.
3 bar safety valve.
A treatment of the heating and water system water is required, Safety valve (Part. 5 Fig. 32) discharge must always be conveyed
in compliance with the technical standards in force, in order to through a draining funnel. Consequently, in the event of valve
USER
protect the system and the appliance from deposits (e.g. scale), intervention, the discharged liquid will end up in the sewer system.
slurry or other hazardous deposits. In order not to void the heat
exchanger warranty, you are required to comply with what has Condensate drain.
been prescribed in (Par. 1.22. To drain the condensate produced by the appliance, it is necessary
to connect to the drainage system by means of acid condensate
Water connections must be made in a rational way using the resistant pipes, with an internal Ø of at least 13 mm. The system
couplings on the boiler template. connecting the appliance to the drainage system must be carried
out in such a way as to prevent occlusion and freezing of the liquid
contained in it. Before appliance ignition, ensure that the con-
densate can be correctly removed. After first ignition, check that
the drain trap is filled with condensate (Para. 1.24). Also, comply
with national and local regulations on discharging waste waters.
In the event condensate is not discharged into the wastewater
drainage system, a condensate neutraliser must be installed to
ensure compliance with the parameters established by the legisla-
tion in force.
12
1.8 ELECTRICAL CONNECTION. To protect from possible dispersions of DC voltage, it is necessary
The appliance has an IPX5D protection degree; electrical safety of to provide a type A differential safety device.
the appliance is achieved only when it is connected properly to an If the power supply cable is damaged, it must be replaced by a
efficient earthing system, as specified by current safety standards. special cable or assembly, which are only available from the manu-
facturer or its After-sales Service. It is recommended to contact
ATTENTION:
INSTALLER
a qualified company (e.g. the Immergas Authorised After-Sales
the manufacturer declines any respon- Technical Assistance Service) for replacement to avoid a hazard.
sibility for damage or physical injury The power cable must be laid as shown (Fig. 5).
If the network fuse on the connection terminal block needs re-
caused by failure to connect the boiler placing, this must also be done by qualified personnel: use a 3.15
to an efficient earthing system or failure A fast fuse.
to comply with the IEC reference standards. For the main power supply to the appliance, never use adapters,
multiple sockets or extension leads.
• Open the control panel connections compartment (Fig. 6). Installation with system operating at direct low temperature.
To carry out electrical connections, all you have to do is open The boiler can directly supply a low-temperature system by setting
the connections compartment as follows. the flow temperature adjustment range “t0” and “t1” (Par. 3.15). In
- Remove the front panel (Fig. 49). this situation it is good practice to insert a relevant safety kit (op-
tional) made up from a thermostat (with adjustable temperature).
- Remove the cover (Ref. b Fig. 6).
Execute connection to terminal boards 14 and 15, eliminating
1) Loosen the two screws (a). jumper X70 (Fig. 36). The thermostat must be positioned on the
2) Press the two hooks on the cover (b). system flow pipe at a distance of at least 2 metres from the boiler.
USER
3) Remove the cover (b) from the control panel (c).
- At this point, it is possible to access the terminal board (d). 1.9 REMOTE CONTROLS AND ROOM CHRONO-
THERMOSTATS (OPTIONAL).
Also ensure that the electrical installation corresponds to maxi- The boiler is prepared for the application of room chrono-
mum absorbed power specifications as shown on the boiler data thermostats or remote controls, which are available as optional
nameplate. Boilers are supplied complete with an “X” type power kits (Fig. 7).
cable without plug. All Immergas chrono-thermostats are connected with 2 wires
only. Carefully read the user and assembly instructions contained
ATTENTION:
in the accessory kit.
The power supply cable must be con-
nected to a 230V ±10% / 50Hz mains
supply respecting L-N polarity and
earth connection; this network must
also have a multi-pole circuit breaker
with class III overvoltage category in
compliance with installation regulations.
1 3
b
1
a a
6 7
13
Comando Amico Remoto Remote Control V2 or On/Off
ATTENTION: chrono-thermostat electrical connections (Optional). The oper-
disconnect power to the appliance be- ations described below must be performed after having removed
fore any electrical connection. the voltage from the appliance. Any thermostat or On/Off en-
vironment chrono-thermostat must be connected to clamps 40
INSTALLER
and 41 eliminating jumper X40 (Fig. 36). Make sure that the On/
• On/Off Immergas digital chrono-thermostat. Off thermostat contact is of the “clean” type, i.e. independent of
The chrono-thermostat allows: the mains voltage, otherwise the P.C.B. would be damaged. Any
- set two room temperature value: one for day (comfort temper- Comando Amico Remoto remote control V2 must be connected
ature) and one for night (reduced temperature); to terminals 44 and 41, eliminating jumper X40 on the P.C.B.
- set a weekly programme with four daily switch on and switch (Fig. 36).
off times; If the Comando Amico Remoto remote control V2 or
- selecting the required function mode from the various possible any other On/Off chrono-thermostat is used arrange
alternatives: two separate lines in compliance with current regu-
• manual mode (with adjustable temperature). lations regarding electrical systems. No boiler pipes
• automatic mode (with set programme). must ever be used to earth the electric system or telephone
• forced automatic mode (momentarily changing the temperature lines. Ensure elimination of this risk before making the boiler
of the automatic programme). electrical connections.
The chrono-thermostat is powered by two 1.5V LR 6 type alkaline
batteries;
• Comando Amico Remoto Remote Control Device V2 (CARV2) 1.10 EXTERNAL TEMPERATURE PROBE (OPTIONAL).
USER
with climate chrono-thermostat function. The boiler is designed for the application of the external tempera-
In addition to the functions described in the previous point, ture probe (Fig. 8), which is available as an optional kit. Refer to
the CARV2 panel enables the user to control all the important the relative instruction sheet for positioning of the external probe.
information regarding operation of the appliance and the heating The probe can be connected directly to the boiler electrical system
system with the opportunity to easily intervene on the previously and allows the max. system flow temperature to be automatically
set parameters, without having to go to where the appliance is decreased when the external temperature increases, in order to
installed. The panel is provided with self-diagnosis to display adjust the heat supplied to the system according to the change in
any boiler functioning anomalies. The climate chrono-thermo- external temperature. The external probe always operates when
stat incorporated into the remote panel enables the system flow connected, regardless of the presence or type of room chrono-
temperature to be adjusted to the actual needs of the room being thermostat used and can work in combination with Immergas
heated, in order to obtain the desired room temperature with chrono-thermostats. The correlation between system flow tem-
extreme precision and therefore with evident saving in running perature and external temperature is determined by the position of
costs. The CARV2 is fed directly by the boiler by means of the the central heating selector switch on the boiler control panel (or
same 2 wires used for the transmission of data between the boiler on the CARV2 control panel if connected to the boiler) according to
and device. the curves shown in the diagram (Fig. 9). The electric connection
of the external probe must be made on clamps 38 and 39 on the
If the system is divided into zones using the relevant terminal board in the boiler control panel (Fig. 36).
kit, the CARV2 must be used with its climate thermostat
function disabled, i.e. it must be set to On/Off mode.
EXTERNAL PROBE
Correction law of the flow temperature depending on the external
45 temperature and user adjustment of the central heating temperature.
Position of the central heating user

adjustment
58
TM (°C)
MAX.
31 MIN
8 9
14
1.11 IMMERGAS FLUE SYSTEMS.
Immergas supplies various solutions separately from the boilers (A)
regarding the installation of air intake terminals and flue exhaust,
which are fundamental for boiler operation.
ATTENTION:
INSTALLER
the boiler must be installed exclusive-
ly with an original Immergas “Green
Range” inspectionable air intake system and
flue gas extraction system made of plastic,
(B)
with the exception of the C6 configuration, as 10
required by the regulations in force and by the
• Positioning the gaskets (black) for “green range” flue systems.
product’s approval. Position the gasket correctly (for bends and extensions) (Fig. 10):
This flue can be identified by an identification - gasket (A) with notches, to use for bends;
mark and special distinctive marking bearing - gasket (B) without notches, to use for extensions.
the note "only for condensation boilers". N.B.: if necessary, to ease the push-fitting, spread the elements
with commonly-used talc.
The plastic pipes cannot be installed outdoors, • Extension pipes and concentric elbows push-fittings.
for tracts longer than 40 cm, without suitable
USER
To install push-fitting extensions with other elements of the flue
protection from UV rays and other atmos- extraction elements assembly, proceed as follows: Install the con-
pheric agents. centric pipe or elbow with the male side (smooth) on the female
side (with lip seal) to the end stop on the previously installed
element in order to ensure sealing efficiency of the coupling.
• Resistance factors and equivalent lengths.
Each flue component has a Resistance Factor based on experi- N.B.: if the exhaust terminal and/or extension concentric pipe
mental tests and specified in the table below. The Resistance needs shortening, consider that the internal duct must always
Factor for individual components is independent from the type protrude by 5 mm with respect to the external duct.
of boiler on which it is installed and has a dimensionless size. It N.B.: for safety purposes, do not obstruct the boiler intake/
is however, conditioned by the temperature of the fluids that pass exhaust terminal, even temporarily.
through the pipe and therefore, varies according to applications
The various parts of the flue system must be checked
for air intake or flue exhaust. Each single component has a resist-
to ensure that they have been laid in such a way as
ance corresponding to a certain length in metres of pipe of the
to prevent the coupled parts from detaching, in par-
same diameter; the so-called equivalent length, can be obtained
ticular, the flue exhaust duct in the Ø80 separator kit
from the ratio between the relative Resistance Factors.
configuration. Should the aforesaid condition not be
All boilers have an experimentally obtainable maximum Resist-
adequately guaranteed, it will be necessary to use the
ance Factor equal to 100.
special clamp ring nut clip kit.
The maximum Resistance Factor allowed corresponds to the
resistance encountered with the maximum allowed pipe length N.B.: when installing horizontal pipes, a minimum inclination
for each type of Terminal Kit. This information allows calcula- of 3% towards the boiler must be maintained, and a section clip
tions to be made to verify the possibility of setting up various with pin must be installed every 3 metres.
flue configurations.
Note: to dimension the flue ducting using commercial compo-
nents, refer to the table of combustion parameters (Paragraph 4.2).
15
1.12 TABLES OF RESISTANCE FACTORS AND EQUIVALENT LENGTHS OF “GREEN RANGE” FLUE SYSTEM
COMPONENTS.
Resistance Length
TYPE OF DUCT Factor in m of concentric pipe
(R) Ø 80/125
INSTALLER
Concentric pipe 80/125 Ø m 1 2.1 1
90° concentric bend Ø 80/125 3.0 1.4
Concentric bend 45° Ø 80/125 2.1 1
Terminal complete with concentric horizontal intake-exhaust

2.8 1.3
Ø 80/125
Terminal complete with concentric vertical intake-exhaust

3.6 1.7
Ø 80/125
90° concentric bend Ø 80/125 with inspection 3.4 1.6

USER
Stub pipe with inspection Ø 80/125 3.4 1.6

16
Resistance Length Length Length Length
TYPE OF DUCT Factor in m of concen- in metres in metres in m of concen-
(R) tric pipe Ø 60/100 of a Ø 80 pipe of a Ø 60 pipe tric pipe Ø 80/125
INSTALLER
Concentric pipe Ø 60/100 Intake and Intake m 7.3
m1 Exhaust m 1.9 m 3.0
m1 Exhaust 6.4 Exhaust m 5.3
Intake and Intake m 9.4
90° concentric bend Ø 60/100 m 1.3 Exhaust m 2.5 m 3.9
Exhaust 8.2 Exhaust m 6.8
Concentric bend 45° Ø Intake and Intake m 7.3
m1 Exhaust m 1.9 m 3.0
60/100 Exhaust 6.4 Exhaust m 5.3
Terminal complete with Intake m 17.2
Intake and
concentric horizontal intake- m 2.3 Exhaust m 4.5 m 7.1
Exhaust 15 Exhaust m 12.5
exhaust Ø 60/100
Concentric horizontal intake- Intake and Intake m 11.5
m 1.5 Exhaust m 3.0 4.7 m
exhaust terminal Ø 60/100 Exhaust 10 Exhaust m 8.3
Terminal complete with Intake m 18.7
Intake and
concentric vertical intake- m 2.5 Exhaust m 4.9 m 7.7
exhaust Ø 60/100
USER
Intake m 10.3
Concentric vertical intake- Intake and
1.4 m Exhaust m 2.7 m 4.3
exhaust terminal Ø 60/100 Exhaust 9 Exhaust m 7.5
Intake 0.87 m 0.1 Intake m 1.0 m 0.4

Pipe Ø 80 m 1 Exhaust m 0.4
Exhaust 1.2 m 0.2 Exhaust m 1.0 m 0.5
Complete intake terminal Ø
Intake 3 m 0.5 Intake m 3.4 Exhaust m 0.9 1.4 m
80 m 1
Intake terminal Ø 80 Intake 2.2 m 0.35 Intake m 2.5 m1

Exhaust m 0.6
Exhaust terminal Ø 80

Bend 90° Ø 80 Exhaust m 0.8

Bend 45° Ø 80 Exhaust m 0.5
Exhaust 1.6 m 0.25 Exhaust m 1.3 0.7
Intake 3.8
Pipe Ø 60 m 1 for ducting Exhaust 3.3 m 0.5 Exhaust m 1.0 m 1.5
Exhaust 2.7
Bend 90° Ø 60 for ducting Intake 4.0
Exhaust 2.9
Intake and Intake m 3.0
Reduction Ø 80/60 m 0.4 Exhaust m 0.8 m 1.2
Intake m 14
Terminal complete with
exhaust Exhaust 12.2 m 1.9 Exhaust m 3.7 m 5.8
vertical Ø 60 for ducting Exhaust m 10.1
17
1.13 OUTDOOR INSTALLATION IN PARTIALLY Max. length of exhaust duct.
PROTECTED AREA. The flue pipe (both vertical or horizontal) can be extended to a
max. length of 30 linear metres.
A partially protected location is a place where the
appliance is not exposed to the direct effects of the Coupling of extension pipes.
weather (rain, snow, hail, etc.). To install push-fitting extensions with other elements of the flue,
INSTALLER
proceed as follows: Couple the pipe or elbow with the male side
If the appliance is installed in a place where the am- (smooth) in the female side (with lip seal) to the end stop on the
bient temperature drops below 0°C, use the optional previously installed element. This will ensure sealing efficiency
antifreeze kit, checking the ambient operating tem- of the coupling.
perature range shown in the technical data table in Configuration without cover kit in a partially protected location
this instruction booklet. (type C boiler).
By leaving the side plugs fitted it is possible to install the appliance
Configuration type B, open chamber and fan assisted. externally without the cover kit. Installation takes place using the
(B23 or B53). Ø60/100 and Ø 80/125 concentric intake/ exhaust kits. Refer to
Using the special coverage kit one can achieve direct air intake the paragraph on indoor installation. In this configuration the up-
(Fig. 11) and flue gas exhaust in a single chimney or directly per cover kit guarantees additional protection for the boiler. It is
outside. In this configuration it is possible to install the boiler recommended but not compulsory. The Ø 80/80 separating device
in a partially protected place. In this configuration the boiler is cannot be used in this configuration (coupled with the cover kit).
classified as type B.
With this configuration:
- air intake takes place directly from the environment in which
USER
the appliance is installed (external);

- the flue gas exhaust must be connected to its own single chimney
(B23) or ducted directly outside via a vertical terminal for direct
exhaust (B53) or via an Immergas ducting system (B53).
The technical regulations in force must be respected.
Kit assembly (Fig. 12).
By leaving the side plugs fitted it is possible to install the appliance
externally without the cover kit. Installation takes place using the
Ø60/100 and Ø 80/125 concentric intake/ exhaust kits. Refer to
the paragraph on indoor installation. In this configuration the up-

per cover kit guarantees additional protection for the boiler. It is
recommended but not compulsory. The Ø 80/80 separating device
cannot be used in this configuration (coupled with the cover kit).
18
11 12
The cover kit includes:
INSTALLER
N° 1 Thermoformed cover
N°1 Gasket clamping plate
N°1 Gasket
N°1 Gasket tightening clip
N°1 Intake hole covering plate
The terminal kit includes:

N° 1 Gasket
N° 1 Exhaust flange Ø 80
N° 1 Bend 90° Ø 80
N° 1 Exhaust pipe Ø 80
N° 1 Wall sealing plate
USER
13
19
1.14 CONCENTRIC HORIZONTAL KIT INSTALLATION. • Extensions for Ø 60/100 horizontal kit (Fig. 15).
• Type C configuration, sealed chamber and fan assisted. The kit with this configuration can be extended up to a max.
The position of the terminal (in terms of distances from openings, horizontal length of 12.9 m including the terminal with grid and
overlooking buildings, floor, etc.) must be in compliance with the excluding the concentric bend leaving the boiler. This configura-
regulations in force. tion corresponds to a resistance factor of 100. In this case the
INSTALLER
special extensions must be requested.

This terminal is connected directly to the outside of the build-
ing for air intake and flue gas exhaust. The horizontal kit can Immergas also provides a Ø 60/100 simplified terminal, which in
be installed with the rear, right side, left side or front outlet. For combination with its extension kits allows you to reach a maxi-
installation with frontal outlet, one must use the fixing plate and mum extension of 11.9 metres.
a concentric bend coupling in order to ensure sufficient space to Horizontal intake-exhaust kit Ø 80/125. Kit Assembly
carry out the tests required by law upon commissioning. (Fig. 16):
• External grid. to install the kit Ø 80/125 one must use the flanged adapter kit
Both the Ø 60/100 and Ø 80/125 intake/exhaust terminal, if in order to install the flue system Ø 80/125. Install the flanged
properly installed, is pleasant to look at on the outside of the adaptor (2) on the central hole of the boiler, positioning gasket
building. Make sure that the external silicone wall sealing plate (1) with the circular projections downwards in contact with the
is properly inserted in the wall. boiler flange, and tighten using the screws contained in the kit.
Engage the bend (3) with the male side (smooth) to the end stop
ATTENTION: on the adapter (1). Fit the Ø 80/125 (5) concentric terminal pipe
for correct functioning of the system with the male side (smooth) to the female side of the bend (4)
(with lip seals) up to the end stop; making sure that the internal
the terminal with grid must be in- (6) and external wall sealing plate (7) have been fitted, this will
USER
stalled correctly ensuring that, the "high" ensure sealing and joining of the elements making up the kit.
indication present on the terminal is respect-
ed on installation.
Horizontal intake-exhaust kit Ø 60/100. Kit Assembly
(Fig. 14):
install the bend with flange (2) on the central hole of the boiler,
positioning gasket (1) with the circular projections downwards in
contact with the boiler flange, and tighten using the screws present
in the kit. Fit the Ø 60/100 (3) concentric terminal pipe with the
C13
male side (smooth) to the female side of the bend (2) up to the
end stop; making sure that the internal and external wall sealing
plate have been fitted, this will ensure sealing and joining of the
elements making up the kit.
15
C13 C13
3
2 4
2 5
1 3 6
4 1
5
The adaptor kit includes:
N° 1 - Gasket (1)
N° 1 - Adapter Ø 80/125 (2)
The kit includes: The Kit Ø 80/125 includes:

N° 1 - Gasket (1) N° 1 - Concentric bend Ø 80/125 at 87° (3)
N° 1 - Concentric bend Ø 60/100 (2) N° 1 - Concentric intake-exhaust terminal Ø 80/125 (4)
N° 1 - Int./exhaust concentric terminal Ø 60/100 (3) N° 1 - Internal wall sealing plate (5)
N° 1 - Internal wall sealing plate (4) N° 1 - External wall sealing plate (6)
N° 1 - External wall sealing plate (5) The remaining kit components must not be used
14 16
20
C13 Vertical kit with aluminium tile Ø 60/100.
Kit assembly (Fig. 18):
install the concentric flange (2) on the central hole of the boiler,
positioning gasket (1) with the circular projections downwards
in contact with the boiler flange, and tighten using the screws
INSTALLER
contained in the kit.
Installation of the fake aluminium tile: replace the tiles with the
aluminium sheet (4), shaping it to ensure that rainwater runs off.
Position the fixed half-shell (6) on the aluminium tile and insert
the intake-exhaust pipe (5). Fit the Ø 60/100 concentric terminal
17
pipe with the male side (5) (smooth) into the flange (2) up to the
end stop; making sure that the wall sealing plate has been fitted
• Extensions for Ø 80/125 horizontal kit (Fig. 17). (3), this will ensure sealing and joining of the elements making
The kit with this configuration can be extended up to a max. up the kit.
length of 32 m, including the terminal with grid and excluding
NOTE: when the boiler is installed in areas where very cold tem-
the concentric bend leaving the boiler. If additional components
peratures can be reached, a special anti-freeze kit is available that
are assembled, the length equivalent to the maximum allowed
can be installed as an alternative to the standard kit.
must be subtracted. In this case the special extensions must be
requested. • Extensions for vertical kit Ø 60/100 (Fig. 19).
The kit with this configuration can be extended to a max. straight
vertical length of 14.4 m, including the terminal. This configura-
1.15 CONCENTRIC VERTICAL KIT INSTALLATION.
tion corresponds to a resistance factor of 100. In this case specific
USER
• Type C configuration, sealed chamber and fan assisted.
extensions must be requested.
Concentric vertical intake and exhaust kit. This vertical terminal
is connected directly to the outside of the building for air intake
and flue gas exhaust.
N.B.: the vertical kit with aluminium tile enables installation on terraces
and roofs with a maximum slope of 45% (approx 25°) and the height
between the terminal cap and half-shell (374 mm for Ø 60/100 and 260
mm for Ø 80/125) must always be observed.
C33 C33
5
7
4 6
MAX. LENGTH 14400 mm)
Max.
3
45%
The Kit includes:

N° 1 - Gasket (1)
N° 1 - Female concentric flange (2)
N° 1 - Wall sealing plate (3)
N° 1 - Aluminium tile (4)
N° 1 - Int./exhaust concentric pipe Ø 60/100 (5)
N° 1 - Fixed half-shell (6)
N° 1 - Mobile half-shell (7)
18 19
21
Vertical kit with aluminium tile Ø 80/125. • Extensions for vertical kit Ø 80/125 (Fig. 21).
Kit assembly (Fig. 20): The kit with this configuration can be extended up to a max.
to install the kit Ø 80/125 one must use the flanged adapter kit length of 32 m including the terminal. If additional components
in order to install the flue system Ø 80/125. Install the flanged are assembled, the length equivalent to the maximum allowed
adaptor (2) on the central hole of the boiler, positioning gasket must be subtracted. In this case specific extensions must be
INSTALLER
(1) with the circular projections downwards in contact with the requested.
boiler flange, and tighten using the screws contained in the kit.
Installation of the fake aluminium tile: replace the tiles with the
1.16 SEPARATOR KIT INSTALLATION.
aluminium sheet (4), shaping it to ensure that rainwater runs off.
Type C configuration, sealed chamber and fan assisted.
Position the fixed half-shell (5) on the aluminium tile and insert
the intake-exhaust pipe (7). Fit the Ø 80/125 concentric terminal • Separator kit Ø 80/80.
pipe with the male side (smooth) to the female side of the adapter This kit allows air to come in from outside the building and the
(1) (with lip gaskets) up to the end stop; making sure that the wall exhaust to exit from the chimney, flue or intubated duct through
sealing plate (3) has been fitted, this will ensure sealing and joining divided flue exhaust and air intake pipes. Combustion products
of the elements making up the kit. are expelled from pipe (S) (in plastic, so as to resist acid con-
densate). Air is taken in through duct (A) for combustion (this
is also in plastic). The intake pipe (A) can be installed either on
the right or left hand side of the central exhaust pipe (S). Both
C33 ducts can be routed in any direction.
• Kit assembly (Fig. 22):
install flange (4) on the central hole of the boiler, positioning
7
gasket (1) with the circular projections downwards in contact
USER
6 with the boiler flange, and tighten using the hex screws with
flat tip contained in the kit. Remove the flat flange present in
5 the lateral hole with respect to the central one (according to
needs) and replace it with the flange (3), positioning the gasket
4 (2) already present in the boiler and tighten using the supplied
self-threading screws. Fit the male side (smooth) to the bends (5)
in the female side of the flanges (3 and 4). Fit the intake terminal
(6) with the male side (smooth) in the female side of the bend
3
(5) up to the end stop, ensuring that the internal and external
The adaptor kit includes: wall sealing plates are fitted. Fit the exhaust pipe (9) with the
2
N° 1 - Gasket (1) male end (smooth) to the female end of the bend (5) up to the
N° 1 - Adapter
1
Ø 80/125 (2)
The Kit Ø 80/125 includes: C53* - C83

N° 1 - Wall sealing plate (3)
5 5 6
N° 1 - Aluminium tile (4)
7
N° 1 - Fixed half-shell (5) 8
N° 1 - Mobile half-shell (6) 7 S
9
N° 1 - Concentric intake-exhaust terminal Ø 80/125 (7)
The remaining kit components must not be used
20 4 A
3
1
C33 2
The kit includes:

N° 1 - Exhaust gasket (1)
N° 1 - Flange gasket (2)
Max. 32000 mm
N° 1 - Female intake flange (3)

N° 1 - Female exhaust flange (4)
Max.
N° 2 - Bend 90° Ø 80 (5)

N° 1 - Intake terminal Ø 80 (6)
45%
N° 2 - Internal wall sealing plates (7)

N° 1 - External wall sealing plate (8)
N° 1 - Exhaust pipe Ø 80 (9)
* to complete C53 configuration, also provide for a “green

range” roof discharge terminal.
The configuration on walls opposite the building is not allowed.
21 22
22
end stop; making sure that the internal wall sealing plate has
been fitted, this will ensure sealing and joining of the elements
making up the kit.
• Installation clearances (Fig. 23).
The minimum installation clearance measurements of the Ø
INSTALLER
80/80 separator terminal kit have been stated in some limit
conditions.
• Extensions for separator kit Ø 80/80.
The maximum vertical straight length (without bends) that
can be used for Ø 80 intake and exhaust pipes is 41 metres, re-
gardless from whether they are used for intake or exhaust. The
maximum horizontal straight length (with bend in suction and
in exhaust) that can be used for Ø 80 intake and exhaust pipes
is 36 metres, regardless from whether they are used for intake
or exhaust. Please note the type of installation C43 must be done
with a natural draught flue.
N.B.: to favour the removal of possible condensate forming in the
exhaust pipe, tilt the pipes towards the boiler with a minimum
slope of 1.5% (Fig. 24).
USER
C43
23 MAINTENANCE TECHNICIAN
C83
80 mm
Minimum slope 1.5%
24
23
1.17 ADAPTOR C9 KIT INSTALLATION. Kit Assembly.
This kit allows an Immergas boiler to be installed in "C93" configu- - Mount the components of kit "C9" on the door (A) of the ducting
ration, with combustion air intake directly from the shaft where system (Fig. 26).
the flue gas exhaust is, obtained by means of a ducting system. - (Version Ø 125 only) mount the flanged adaptor (11) interposing
System composition. the concentric gasket (10) on the boiler, fitting it with the screws
INSTALLER
The system must be combined with the following components (12).

(sold separately) to be functional and complete: - Mount the ducting system as described in the relative instruc-
- kit C93 Ø 100 or Ø125 version; tions sheet.
- rigid ducting Ø 60 and Ø 80 and flexible Ø 50 and Ø 80 kit; - Calculate the distances between the boiler drain and the bend
of the ducting system.
- flue exhaust kit Ø 60/100 or Ø 80/125 configured according to
the installation and type of boiler. - Prepare the boiler flue system, making sure that the internal pipe
of the concentric kit is fitted up to the end stop in the ducting
system curve (Quota "X" Fig. 27), whereas the external pipe must
reach the end stop of the adapter (1).
N.B.: to encourage the removal of possible condensate forming in the
exhaust pipe, tilt the pipes towards the boiler with a minimum slope of
1.5%.
- Mount the cover (A) complete with adaptor (1) and caps (6) on
the wall and assemble the flue system to the ducting system.
N.B.: (version Ø 125 only) before assembly check the gaskets are in the
right position. In the event component lubrication (already carried out
USER
A A by the manufacturer) is not sufficient, remove the residual lubricant

B C using a dry cloth, then to ease fitting coat the parts with common or
industrial talc.
Ducting Once all components have been assembled properly, the exhaust
Ø 60 Rigid and fumes will be expelled via the ducting system; the combustion
Ø 50 Flexible SHAFT SHAFT
air for normal boiler operation will be aspirated directly by the
(A) mm (B) mm (C) mm
shaft (Fig. 27).
66 106 126
Ducting
Ø 80 Rigid SHAFT SHAFT

86 126 146
Ducting
Ø 80 Flexible SHAFT SHAFT
90 130 150
25
Kit composition: Installation drawings key:

Ref. Qty Description Unique identification of the component
1 1 Door adaptor Ø 100 or Ø 125
1 in the kit
2 1 Door gasket made of neoprene Identification of the component not sup-
3 4 Screws 4.2 x 9 AF
A plied in this kit
4 1 Hex headed screw M6 x 20 2
1
5 1 Flat nylon washer M6 3
6 2 Door hole closure metal-sheet plate plug
7 1 Plug gasket made of neoprene
8 1 Toothed washer M6 A
9 1 Nut M6
12
10 1 (kit 80/125) Concentric gasket Ø 60-100
3
11 1 (kit 80/125) Flanged adapter Ø 80-125
8 9
12 4 (kit 80/125) Hex headed screws M4 x 16 slotted 3 6
- 1 (kit 80/125) Bag of lubricating talc
12 7
6
Supplied separately: 4
5
Ref. Qty Description 11
A 1 Ducting kit door 10
26
24
Technical data.
- The dimensions of the shafts must ensure a minimum gap be-
tween the outer wall of the smoke duct and the inner wall of the
shaft: 30 mm for circular section shafts and 20 mm in the event
of a square section shaft (Fig. 24).
INSTALLER
- Maximum 2 changes of direction are allowed on the vertical
section of the flue system with a maximum clearance angle of
30° with respect to the vertical.
- The maximum vertical extension using a Ø 60 ducting system is
13 m, the maximum extension includes 1 bend Ø 60/10 at 90°,
1 m of horizontal pipe 60/100, 1 90° ducted bend Ø 60 and the
roof terminal for ducting.
To determine the C93 flue system in configurations other than
that described (Fig. 26) one must consider that 1 metre of ducted
pipe according to the indications described has a resistance factor
equal to 4.9.
- The maximum vertical extension using a Ø 80 ducting system
is 28 m, the maximum extension includes 1 adapter 60/100 to
80/125, 1 87° bend Ø 80/125, 1 m of horizontal pipe 80/125, 1
90° ducted bend Ø 80 and the roof terminal for ducting.
USER
To determine the C93 flue system in configurations other than
that described (Fig. 26) one must consider the following head
losses:
- 1 m of concentric pipe Ø 80/125 = 1 m of ducted pipe;
- 1 87° bend = 1.4 m of ducted pipe;
Consequently one must subtract the equivalent length of the
part added to the 28 m available.
C93
27
25
1.18 DUCTING OF FLUES OR TECHNICAL SLOTS. - The maximum length specified by the manufacturer must be
Ducting is an operation through which by inserting one or respected; in this regard:
more relevant pipes, one achieves a system for the evacua- - The max. possible length of the Ø 60 flexible ducting vertical
tion of the combustion products of a gas appliance, consist- section is equal to 22 m. This length is obtained considering the
ing in the combination of an existing or new ducting pipe complete Ø 80 exhaust terminal, 1m of Ø 80 pipe in exhaust,
INSTALLER
with a chimney, flue or technical slot (also in new buildings) two 90° Ø 80 bends at boiler outlet.
(Fig. 28). Ducting requires ducts declared to be suitable for the
- The max. possible length of the Ø 80 flexible ducting vertical
purpose by the manufacturer, following the installation and user
section is equal to 18 m. This length is obtained considering the
instructions, provided by the manufacturer and the requirements
Ø80 complete exhaust terminal, 1m of Ø 80 pipe in exhaust, two
of the regulations in force.
90° Ø 80 bends at boiler outlet for connecting to the ducting
Immergas ducting system. system and two direction changes of the flexible hose inside
The Ø 60 rigid, Ø50 and Ø 80 flexible and Ø80 rigid “Green Range” the chimney/technical slot.
ducting systems must only be used for domestic use and with Im- - The max. possible length of the Ø 80 flexible ducting vertical
mergas condensing boilers. section is equal to 30 m. This length is obtained considering the
In any case, ducting operations must respect the provisions complete Ø 80 exhaust terminal, 1m of Ø 80 pipe in exhaust,
contained in the standard and in current technical regulations; two 90° Ø 80 bends at boiler outlet.
in particular, the declaration of conformity must be compiled You can also install an additional Ø50 flexible ducting system
at the end of work and on commissioning of the ducted system. the specifications of which are found on the relevant instructions
The instructions in the project or technical report must likewise sheet inside the kit.
be followed, in cases provided for by the standard and current
1.19 CONFIGURATION TYPE B, OPEN CHAMBER AND
USER
technical regulations. To guarantee reliability and operation over

time of the ducting system, make sure: FAN ASSISTED FOR INDOORS.
- it is used in average atmospheric and environmental conditions, The appliance can be installed inside buildings in B23 or B53 mode;
according to current regulations (absence of combustion prod- in this case, all technical rules and national and local regulations
ucts, dusts or gases that can alter the normal thermophysical or in force, must be complied with.
chemical conditions; existence of temperatures coming within For installation the cover kit must be used, referred to in Par. 1.13.
the standard range of daily variation, etc.).
- Installation and maintenance must be performed according to
the indications supplied by the manufacturer included with the
“green range” ducting system chosen and in compliance with
the regulations in force.
C53
28
26
1.20 FLUE EXHAUST TO FLUE/CHIMNEY. Positioning the wall flue exhaust terminals.
Flue exhaust does not necessarily have to be connected to a branched The wall flue exhaust terminals must:
type traditional flue for type B appliances with natural draught (CCR). - be installed on external perimeter walls of the building;
The flue exhaust, for boiler clots installed in C configuration, can be
- be positioned according to the minimum distances specified in
connected to a special LAS type multiple flue. For B23 configurations,
current technical standards.
INSTALLER
exhaust is only allowed into individual chimney or directly into the
external atmosphere via a suitable terminal, unless otherwise provided Combustion products exhaust of natural draught or fan assisted
for by local regulations in force. The multiple flues and the combined appliances in open-top closed environments.
flues must also only be connected to type C appliances of the same In spaces closed on all sides with open tops (ventilation pits,
type (condensation), having nominal heat inputs that do not differ by courtyards etc.), direct combustion product exhaust is allowed for
more than 30% less with respect to the maximum that can be attached natural draught or fan assisted gas appliances with a heat input
and powered by the same fuel. The thermo-fluid dynamic features range from 4 to 35 kW, provided the conditions as per the current
(flue flow rate, % of carbon dioxide, % humidity etc.) of the applianc- technical standards are respected.
es attached to the same multiple flues or combined flues, must not
differ by more than 10% with respect to the average boiler attached.
Multiple and combined flues must be specially designed according to
the calculation method and requirements of the standards (such as
UNI EN 13384), by professionally qualified technical staff. Chimney
or flue sections for connection of the flue exhaust pipe must comply
with requisites of technical standards in force. It is possible to replace
a type C conventional device with one provided with condensation
only, if the derogation conditions established by the regulations in
USER
force have been verified.
1.21 FLUES, CHIMNEYS AND CHIMNEY CAPS.

The flues, chimneys and chimney caps for the evacuation of com-
bustion products must be in compliance with applicable standards.
Chimneys and roof-installed exhaust terminals must comply with
the outlet height and with the distance from technical volumes
set forth by the technical standards in force.
29
27
1.22 WATER TREATMENT SYSTEM FILLING.
As already mentioned in the previous paragraphs, a
treatment of the thermal and domestic system water
System water litres

is required, in compliance with the local standards
in force.
INSTALLER
The parameters that influence the duration and prop-

er operation of the heat exchanger are the water's PH, total
hardness, conductivity, and oxygen, together with the system's
processing residues (any welding residues), any oil present and
corrosion products that can, in turn, cause damage to the heat
exchanger. Water total hardness °F
In order to prevent this from happening, you are recommended
to: N.B.: the graph refers to the entire life cycle of the system. There-
- Before installation on new systems as well as old ones, clean the fore, also consider scheduled and unscheduled maintenance,
system with clean water to eliminate solid residues contained which involves emptying and filling the said system.
therein
30
- Clean the system with a chemical treatment:
- Clean the new system with a suitable cleaning device (for
example Sentinel X300, Fernox Cleaner F3 or Jenaqua 300) 1.23 SYSTEM FILLING.
combined with thorough washing. Once the boiler is connected, proceed with system filling via the
USER
- Clean the old system with a suitable cleaning device (for ex- filling cock (Part. 1 Fig. 32). Filling is performed at low speed to
ample Sentinel X400 or X800, Fernox Cleaner F3 or Jenaqua ensure release of air bubbles in the water via the boiler and central
400) combined with thorough washing. heating system vents.
- Check the maximum total hardness and quantity of filling The boiler has a built-in automatic vent valve on the pump. Check if the
water referring to the graphics (Fig. 30); if the contents and cap is loose. Then open the radiator vent valves.
hardness of the water are below the indicated curve, no specific Close radiator vent valves when only water escapes from them.
treatment is required; otherwise, to limit the content of calcium Close the filling valve when the boiler pressure gauge indicates
carbonate, you must provide for water-filling treatment. approx. 1.2 bar.
- Should you be required to provide for water treatment, this N.B.: during these operations, enable the automatic vent func-
should be carried out by completely desalinating the filling tions on the boiler.
water. As opposed to the complete softening process, desalinat-
ing the water completely not only removes hardening agents 1.24 FILLING THE CONDENSATE DRAIN TRAP.
(Ca, Mg), but also eliminates all other minerals to reduce On first lighting of the boiler, flue gas may come out the conden-
water-filling conductivity up to 10 microsiemens/cm. Given its sate drain; after a few minutes’ operation check that this no longer
low conductivity, desalinated water does not only prevent the occurs. This means that the drain trap is filled with condensate to
formation of lime scale, but also serves as protection against the correct level preventing the passage of flue gas.
corrosion.
1.25 GAS SYSTEM START-UP.
- Insert a suitable inhibitor / passivator (for example Sentinel
To start up the system, refer to the technical standards in force.
X100, Fernox Protector F1, or Jenaqua 100); if required, also
In particular, for new gas systems:
insert appropriate antifreeze (such as for example Sentinel
- open windows and doors;
X500, Fernox Alphi 11 or Jenaqua 500).
- avoid presence of sparks or naked flames;
- Check electrical conduction of the water, which should be
higher than 2000 µs/cm in the case of treated water and lower - bleed all air from pipelines;
than 600 µs/cm in the case of non-treated water. - ensure the internal system is properly sealed according to the
- To prevent corrosion, the water system's PH should be between specifications set forth by technical regulations in force.
6.5 and 8.5.
- Check the maximum content of chlorides, which should be
less than 250 mg/l.
N.B.: for quantities and methods of use of water-treatment
products, refer to the instructions provided by their manu-
facturer.
28
1.26 BOILER START-UP (IGNITION).
To commission the boiler (the operations listed below must only be
performed by qualified personnel and in the presence of staff only):
- check that the internal system is properly sealed according to
the specifications set forth by regulations in force;
INSTALLER
- ensure that the type of gas used corresponds to the boiler settings
(the type of gas appears on the display on first electrical power supply,
or by checking the relative parameter “G”);
- check that there is no air in the gas pipe;
- check connection to a 230V-50Hz power mains, correct L-N polarity
and the earthing connection;
- check that the intake/exhaust terminals are not obstructed and
that they are installed properly;
- check that the drain trap is full and that it prevents any passage
of flue gas into the room;
- check that there are no external factors that may cause the formation
of fuel pockets;
- perform the flue test and, if needed, set the correct value of the
parameter “F0” (Par. 3.14);
USER
- activate the quick calibration function (Par. 3.13);
- switch the boiler on and ensure correct ignition;
- make sure that the gas flow rate and relevant pressure values
comply with those given in the manual (Par. 4.1);
- ensure that the safety device intervenes in the event of gas supply
failure and check the relative intervention time;
- check the intervention of the main switch located upstream from
the boiler and in the boiler.
The system must not be started up if even only one of the checks
should be negative.
29
1.27 CIRCULATION PUMP. Pump release. If after a long period of inactivity, the circulator
During central heating mode, the Auto and Fixed operating modes is blocked, adjust the screw in the centre of the head in order
are available. to manually release the motor shaft. Take great care during this
• Auto (A5 = 0): automatic circulator pump speed and proportion- operation to avoid damage to the motor.
al head: The automatic circulator pump speed varies according By-pass Regulation (Part. 3 Fig.32).
INSTALLER
to the power emitted by the burner; the greater the power, the The boiler leaves the factory with the bypass open.
greater the speed. Moreover, within the parameter, one can If necessary, the bypass can be regulated to system requirements
also adjust the circulator pump operating range by setting the from minimum (bypass closed) to maximum (bypass open). Ad-
maximum speed “A3” parameter (adjustable from 6 to 9) and just using a flat-head screwdriver. Turning clockwise opens the
the “A4” minimum speed parameter (adjustable from 6 to the bypass and anticlockwise closes it.
max. set speed).
• ∆T Constant (A5 = 5 ÷ 25 K): the pump speed varies to maintain
the ∆T constant between the system flow and return according
to set value K (A5 = 15 Default).
• Fixed (6 ÷ 9): by setting parameters “A3” and “A4” at the same
value, the pump operates at constant speed.
N.B.: for the boiler to work properly, it is not allowed to drop
below the minimum value indicated above.
In domestic hot water mode, the circulator pump always runs at
full speed.
USER
Total head available to the system.

Speed
9
Circulator pump absorbed power (W)

A
Head (kPa)
Speed 9
C
D
Spe B
ed
6
Flow rate (l/h)
A+B = Head available with bypass closed

B = Head available with bypass open
C+D = Power absorbed by the pump with bypass closed (dotted area)
D = Power absorbed by the pump with bypass open (dotted area)
31
30
1.28 KITS AVAILABLE ON REQUEST. • Relay board (on request). The boiler is prepared for the instal-
• System cut-off valve kits with or without inspectionable filter lation of a relay board that allows to increase the features of the
(on request). The boiler is designed for installation of system appliance and therefore functioning possibilities.
interception cocks to be placed on flow and return pipes of the • Cover kit (on request). If installed outdoors in a partially pro-
connection assembly. This kit is very useful for maintenance tected place with direct air intake, it is compulsory to mount the
INSTALLER
because it allows to empty just the boiler without having to empty appropriate top protective cover for the correct functioning of
the entire system. Moreover, the version with filter preserves the the boiler and to protect it from adverse weather conditions.
functioning characteristics of the boiler thanks to its inspection-
• Cycloidal filter kit (on request). The magnetic cycloidal filter is
able filter.
able to detect the ferrous residues present in the system's water.
• System zone control unit kit (on request). If the central heating Thanks to the two cocks in the kit, it facilitates maintenance by
system is to be divided into several zones (max. three), in order cleaning the filter without having to empty the circuit.
to interlock them with separate adjustments and to keep water
The above-mentioned kits are supplied complete with instructions
flow rate high for each zone, Immergas supplies zone system kits
for assembly and use.
by request.
• Polyphosphate dispenser kit (on request). The polyphosphate
dispenser reduces the formation of lime-scale and preserves the
original heat exchange and domestic hot water production condi-
tions. The boiler is prepared for application of the polyphosphate
dispenser kit.
N.B.: this is a type of chemical conditioning treatment for do-
mestic hot water, if provided for by current regulations.
USER
31
1.29 BOILER COMPONENTS.
INSTALLER
USER
Key: 11 - Air / gas manifold 19 - Fan

1 - Filling valve system 12 - Flue probe 20 - Air / gas mixer
2 - Draining valve system 13 - Flue gas sample points 21 - Gas nozzle
3 - Bypass (air A) - (flue gas F) 22 - D.H.W. probe
4 - 3-way valve (motorised) 14 - Domestic hot water 23 - Air vent valve
5 - 3 bar safety valve expansion vessel 24 - Stainless steel storage tank
6 - Gas valve 15 - System expansion vessel 25 - System pressure switch
7 - Boiler pump 16 - Condensation module 26 - Condensate drain trap
8 - Air intake pipe 17 - Burner 27 - Control panel
9 - Flow probe 18 - Ignition/detection 28 - 8 bar safety valve
10 - Return probe electrodes 29 - Storage tank draining fitting
32
32
2 INSTRUCTIONS

MAINTENANCE.
FOR USE AND • Do not open or tamper with the appli-
ance.
2.1 GENERAL WARNINGS. • Do not take apart or tamper with the
ATTENTION: intake and exhaust pipes.
INSTALLER
• Never expose the wall-mounted boiler • Only use the user interface devices listed in
to direct vapours from a cooking sur- this section of the booklet.
face. • Do not climb on the appliance, do not use
• The device can be used by children at least 8 the appliance as a supporting surface.
years old as well as by persons with reduced
physical, sensory or mental capabilities, or
lack of experience or required knowledge, ATTENTION:
provided that they are under surveillance, The use of components involving use of
or after they have been instructed relating electrical power requires some funda-
to the safe use and have understood the po- mental rules to be observed such as:
tential dangers. Children must not play with - do not touch the appliance with wet or moist
the appliance. Cleaning and maintenance parts of the body; do not touch when bare-
USER
destined to be performed by the user can not foot;
be carried out by unsupervised children. - never pull electrical cables or leave the ap-
• For safety purposes, check that the air in- pliance exposed to atmospheric agents (rain,
take/flue exhaust terminals (if fitted) are not sunlight, etc.);
blocked. - if the power cable is damaged, it must be
• If temporary shutdown of the boiler is re- replaced by a cable or special assembly by
quired, proceed as follows: contacting a qualified company (e.g. the Im-
a) drain the heating system if antifreeze is mergas Authorised After-Sales Technical As-
not used; sistance Service) for its replacement to avoid
b) shut-off all electrical, water and gas sup- a hazard.
plies. - if the appliance is not to be used for a certain
• In the case of work or maintenance to period, disconnect the main power switch.
structures located in the vicinity of ducting
or devices for flue extraction and relative
accessories, switch off the appliance and
on completion of operations ensure that a
qualified technician checks efficiency of the ATTENTION:
ducting or other devices. water at a temperature of more than 50
• Never clean the appliance or connected parts °C can cause serious burns. Always check
with easily flammable substances. the water temperature before any use.
• Never leave containers or flammable sub-
stances in the same environment as the ap- The temperatures indicated by the display have a toler-
pliance. ance of +/- 3°C due to environmental conditions that
cannot be blamed on the boiler.
33
ATTENTION: ATTENTION:
if you smell gas in the building: if you smell burning or see smoke
- close the gas meter interception device coming out of the appliance, switch it
or the main interception device; off, disconnect the power, close the main gas
INSTALLER
- if possible, close the gas interception cock on cock, open the windows and call an authorised
the product; company (e.g. Authorised After-Sales Service).
- if possible, open doors and windows wide and
create an air current;
- do not use open flames (e.g. lighters, match- ATTENTION:
es); At the end of its service life, the appli-
- do not smoke; ance must not be disposed of like nor-
- do not use electrical switches, plugs, door mal household waste nor abandoned
bells, telephones or intercom devices in the in the environment, but must be removed by a
building; professionally authorised company as required
- call an authorised company (e.g. Authorised by current legislation. Contact the manufactur-
er for disposal instructions.
USER
After-Sales Service).
34
2.2 CLEANING AND MAINTENANCE.
To preserve the boiler's integrity and keep the safety
features, performance and reliability, which distin-
guish it, unchanged over time, you must execute
maintenance operations on a yearly basis in com-
INSTALLER
pliance with what is stated in the relative point at
“annual check and maintenance of the appliance”, in
compliance with national, regional, or local standards in force.
Annual maintenance is essential to validate the conventional
warranty of Immergas.
USER
2.3 CONTROL PANEL.
Key:
1 - Domestic hot water temperature 9 - Blocked boiler, it needs to be un- 14 - Temperature indicator, boiler info and
selector blocked by pressing the “RESET” error codes
2 - Reset Button button 15 - Boiler in Stand-by mode
3 - Summer/Winter Button 10 - Flame presence symbol and relative 16 - Presence of external connected devices
4 - Central heating temperature selector output scale 17 - Not used on this model
5 - Information buttons 11 - Operation in summer mode 18 - Operation with external temperature
6 - Off/Stand-by/On Button 12 - Operation in winter mode probe active (optional)
7 - Boiler manometer 13 - Room central heating mode function- 19 - Boiler connected to remote control V2
8 - DHW production phase function ac- ing active (optional)
tive 20 - Not used on this model
33
35
2.4 USING THE BOILER. “Off ” mode. By holding the button ( ) down for 8 seconds,
Before ignition make sure the heating system is filled with water only the central point remains lit on the display, and all boiler
and that the manometer (7) indicates a pressure of 1 ÷ 1.2 bar. functions are disabled. The safety functions are not guaranteed
- Open the gas cock upstream from the boiler. in this mode.
- Press the button ( ) until the display switches on. At this point,
ATTENTION:
INSTALLER
the boiler goes to the state previous to switch-off.

- If the boiler is on “Stand-by”, press ( ) again to enable it, oth- in “Stand-by” and “Off ” mode, the
erwise go to the next point. boiler is still powered.
- Then press the button ( ) in sequence and set the boiler in
• “Automatic vent” mode. When the function is enabled, every
the summer ( ) or winter ( ) position. time the boiler is electrically powered, the system automatic
• Summer ( ): in this mode the boiler only works to produce vent function is activated (lasting 8 minutes). This function is
DHW; the temperature is set via the selector (1) and the relative displayed via a countdown signalled by the indicator (14). During
temperature is shown on the display via the indicator (14). this period the DHW and CH functions are not active.
• Winter ( ): in this mode the boiler works both for producing The “automatic vent” function can be annulled by pressing the
domestic hot water and for central heating. The temperature of “ ” button.
the DHW is always regulated via the selector (1), the heating • Display operation. The display lights up while the control
temperature is regulated via selector (4) and the relative tem- panel is being used; after a set inactivity period, the brightness
perature is shown on the display via the indicator (14). decreases. The lighting mode can be varied via parameter t8 in
From this moment the boiler functions automatically. With no the P.C.B. programming menu.
USER
demand for heat (central heating or domestic hot water produc-

tion) the boiler goes to “standby” function, equivalent to the boiler
being powered without presence of flame. Each time the burner
ignites, the relative symbol ( ) is displayed.
• Operation with Comando Amico Remoto remote control V2
(CARV2) (Optional). If the CARV2 is connected, the ( )
symbol will appear on the display. The boiler regulation pa-
rameters can be set via the CARV2 control panel and the
button remains active on the boiler control panel, along with
( ) for switch-off (“off ” mode only) and the display where the
functioning state is shown.
Caution: if the boiler is switched “off ” the CARV2 will display
the connection error symbol “ERR>CM”, the CARV2 is however
powered constantly so as not to lose the stored programs.
• Operation with optional external probe ( ). In the case of a
system with optional external probe, the boiler flow temperature
for room central heating is managed by the external probe de-
pending on the external temperature measured (Par. 1.10). The
flow temperature can be modified by selecting the functioning
curve via the selector switch (4) (or on the CARV2 control panel,
if connected to the boiler) selecting a value from “0 to 9”.
With external probe present, the relative symbol ( ) will
appear on the display. In the central heating mode, if the tem-
perature of the water contained in the system is sufficient to heat
the radiators, the boiler can only function with the activation of
the pump.
• Standby mode. Press button (6) until the ( ) symbol 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.
36
2.5 FAULT AND ANOMALY SIGNALS.
The boiler signals any anomalies using a code shown on the boiler
display (14) according to the following table:
Error
Anomaly signalled Cause Boiler status / Solution
Code
INSTALLER
In the event of request of room central heating or domestic
No ignition hot water production, the boiler does not switch on within the
01 Press the Reset button (1)
ignition preset time. Upon appliance commissioning or after extended
downtime, it may be necessary to eliminate the block.
Safety thermostat func-
During normal operation, if a fault causes excessive overheating
02 tion block (NTC flow/ Press the Reset button (1)
internally, the boiler goes into overheating block.
return overheating)
Flue safety thermostat During normal operation, if a fault causes excessive flue gas
block overheating, the boiler blocks
The P.C.B. detects a fault on the gas valve supply. Check its con-
Contacts resistance
04 nection. (the anomaly is detected and displayed only in the event Press the Reset button (1)
block
of a request).
Storage tank probe
05 The board detects an anomaly on the flow NTC probe. The boiler does not start (1)
flow
The anomaly can be reset 5 times consecu-
tively, after which the function in inhibited
for at least one hour. One attempt is gained
USER
08 Maximum N° of resets Number of allowed resets already performed.
every hour for a maximum of 5 attempts.
By switching the appliance on and off
again, the 5 attempts are re-acquired.
Check on the boiler pressure gauge that the
Insufficient system Water pressure inside the central heating circuit that is sufficient
10 system pressure is between 1÷1.2 bar and
pressure to guarantee the correct operation of the boiler is not detected.
restore the correct pressure if necessary.
If normal conditions are restored the
If the board detects an anomaly or incongruity on the boiler restarts without having to be re-
15 Configuration error
electric wiring, the boiler will not start. set. Check that the boiler is configured
correctly (1)
16 Fan anomaly This occurs if the fan has a mechanical or electrical fault. Press the Reset button (1)
This occurs in the event of a leak on the detection circuit or
20 Parasite flame block Press the Reset button (1)
anomaly in the flame control unit.
If normal conditions are restored the
Push button control
24 The board detects an anomaly on the pushbutton panel. boiler restarts without having to be reset
panel anomaly
(1).
29 Flue probe anomaly The board detects an anomaly on the flue probe The boiler does not start (1)
Disconnect and reconnect the power to the
boiler. If the Remote Control is still not
This occurs if an incompatible remote control is connected, or detected on re-starting, the boiler will
Loss of remote control
31 if communication between the boiler and the remote control switch to local operating mode, i.e. using
communication
is lost. the controls on the control panel. In this
case the "Central Heating" (1) function
cannot be activated.
Communication between the various components is interrupted
IMG Bus The boiler does not satisfy the room heat-
36 due to an anomaly on the boiler control unit, on the zone control
communication loss ing requests (1)
unit (optional) or on the IMG Bus.
Low power supply This occurs when the power supply voltage is lower than the If normal conditions are restored the boiler
37
voltage allowed limits for the correct boiler operation. restarts without having to be reset (1)
This occurs when the boiler is ignited correctly and the burner
flame switches off unexpectedly; a new attempt at ignition is If normal conditions are restored the boiler
38 Loss of flame signal
performed and if normal conditions are restored, the boiler restarts without having to be reset (1) (2)
does not have to be reset.
Press the Reset button, before restart-
Block due to loss of This occurs if the ''Flame signal loss'' error occurs many times
43 ing, the boiler will run a post-ventilation
flame signal in a row within a preset period (38).
cycle. (1)
(1) If the shutdown or fault persists, contact an authorised company (e.g. Authorised Technical After-Sales Service)
(2) The anomaly can only be verified in the list of errors in the “Information” menu
37
Error
Code
Block due to exceeding
This occurs if the gas valve remains open for longer than re-
storage tank
44 quired for normal operation, without Press the Reset button (1)
maximum opening time
the boiler switching on.
INSTALLER
close to gas valve

Low temperature During normal operation, if an anomaly causes excessive In this case, after suitable cooling, it is
46 thermostat triggered overheating of the flow temperature in low temperature possible to reset the thermostat (see
(optional) conditions, the boiler blocks. relative instructions sheet). (1).
Should flue high temperature be detected, the boiler reduces
47 Burner power limitation (1)
power supplied so as not to damage it.
If there is no communication between the boiler and Wireless
Check operation of the Wireless CAR,
CAR Wireless commu- version CAR, an anomaly is signalled. From this moment, it is
51 check the battery charge (refer to the rela-
nication failure only possible to control the system by means of the control panel
tive instructions booklet).
of the boiler itself.
Main supply voltage
59 The board detects a main supply voltage frequency anomaly The boiler does not start (1)
frequency block
Try to unblock the pump as described in
The pump is stopped due to one of the following causes: the relative section. If normal conditions
60 Anomaly pump blocked
Impeller blocked, electrical fault are restored the boiler restarts without
having to be reset (1)
Vent the pump and the central heating cir-
USER
61 Air in circulator Air is detected inside the pump; the pump cannot work cuit. If normal conditions are restored the
boiler restarts without having to be reset (1)
Missing calibration is detected by the P.C.B. It may occur in the
Complete calibration
62 event the P.C.B. is replaced or if the parameters are altered in The boiler does not start (1)
required
the air / gas section, thus requiring “complete calibration”.
The P.C.B. detects that some parameters have been altered, thus
72 Fast calibration required The boiler does not start (1)
requiring “fast calibration”.
The board detects an anomaly in the temperature readings
High flow probe and If normal conditions are restored the
of the NTC flow probes; the causes may be: faulty probe,
73 safety flow probe devia- boiler restarts without having to be
tion detected. incorrect position, poor system circulation, or clogging of

reset (1)
the water side primary heat exchanger.
Safety flow
74 The board detects an anomaly on the NTC safety flow probe The boiler does not start (1)
probe anomaly
Combustion
77 Out of range current is detected on the gas valve The boiler does not start (1)
control anomaly
Combustion control
78 High current on the gas valve is detected The boiler does not start (1)
anomaly
Combustion
79 Reduced current on the gas valve is detected The boiler does not start (1)
control anomaly
P.C.B. This occurs in the event of malfunctions of the P.C.B. that controls
malfunction block the valve.
Combustion anomaly -
A low supply pressure is detected on the gas line. As a result the If normal conditions are restored the boiler
84 power reduction in
appliance power is limited and the anomaly is reported. restarts without having to be reset (1) (2)
progress
A malfunction of one of the components that controls the gas
87 Block - gas valve control The boiler does not start (1)
valve has been detected
A malfunction of one of the components that controls the gas
88 Block - gas valve control The boiler does not start (1)
valve has been detected
The flame is unstable due to: presence of flue gas recircula-
Combustion signal
89 tion, wind, unstable gas pressure, unstable fan speed, or due to The boiler keeps working (1) (2)
unstable
system malfunction
Combustion signal The combustion signal is beyond the adjustment range required
90 The boiler keeps working (1) (2)
beyond limit for an extended period of time
The board has exhausted all possible actions in order to obtain
91 Incorrect ignition block Press the Reset button (1)
optimal ignition of the burner
The system has exhausted all possible corrections of the num-
92 Fan revs correction limit The boiler keeps working (1) (2)
ber of fan revs
38
Error
Code
Combustion signal The combustion signal is beyond the adjustment range required
93 The boiler keeps working (1) (2)
beyond limit for a limited period of time.
A problem is detected on the combustion control, which may
If normal conditions are restored the boiler
INSTALLER
94 Combustion anomaly be due to: gas low pressure, flue recirculation, defective gas
restarts without having to be reset (1) (2)
valve or P.C.B.
Combustion signal
95 The system detects a discontinuous combustion signal. The boiler keeps working (1) (2)
discontinuous
The boiler does not start (1)
This occurs in the event an obstruction is detected in the flue
96 Clogged flue If normal conditions are restored the boiler
system.
restarts without having to be reset
Block - maximum no. of The maximum number of software errors possible has been
software errors reached.
99 General block A boiler anomaly has been detected Press the Reset button (1)
USER
39
2.6 INFORMATION MENU.
By pressing the button “ “, the “Information menu” is ac-
tivated for at least 1 second, displaying some boiler operating
parameters.
Press the " " button (4) to scroll the various parameters.
INSTALLER
To exit the menu, press the “ ” button up to the end of the list,
or by pressing the “ ” button or by waiting for 15 minutes.
With the menu active, the indicator (14) will alternately show
the indication of the parameter via the letter “d” plus the num-
ber of the parameter that is being displayed and the value of the
parameter itself.
Id
Description
Parameter
d 0.0 Not used
d 0.1 Displays the combustion signal
d 0.2 Displays the primary heat exchanger output instant heating flow temperature
d 0.3 Displays the instant storage tank unit temperature
d 0.4 Displays the values set for central heating set
d 0.5 Displays the values set for DHW set
Displays the external environment temperature (if optional external probe present)
USER
d 0.6
If the temperature is below zero, the value is displayed flashing.
d 0.7 Displays the temperature read on the flue probe (probe 1)
d 0.8 Displays the system return water temperature.
Displays the list of the last five anomalies.
d 09 (to scroll the list, turn the CH temperature selector (4)). Turning the selector changes the set central heating and the boiler
can be switched off.
Anomaly list reset. Once “d 1.0” is displayed, press the Reset button; deletion is confirmed via the “88” symbols flashing for
d 1.0
two seconds.
d 1.1 Displays the temperature read on the safety flow probe
d 1.2 Displays the pump operating speed
d 1.3 Not used

d 1.4 Displays the pump flow rate (lh/100)
d 1.5 Displays the fan operating speed (rpm/100)
d 1.6 Displays the temperature read on the flue probe (probe 2)
2.7 BOILER SHUTDOWN. 2.9 DRAINING THE SYSTEM.

Switch the boiler off by putting it in “off ” mode, disconnect the To drain the boiler, use the special draining valve (Fig. 34).
onmipolar switch outside of the boiler and close the gas cock Before draining, ensure that the filling cock is closed.
upstream from the appliance. Never leave the boiler switched on
if left unused for prolonged periods. ATTENTION:
if glycol was input in the system’s circuit,
2.8 RESTORE CENTRAL HEATING SYSTEM
make sure it is discharged into the waste
PRESSURE.
Periodically check the system water pressure. The boiler pressure water system, pursuant to regulation EN 1717.
gauge should read a value of between 1 and 1.2 bar.
If the pressure falls below 1 bar (with the circuit cold) restore normal 2.10 DRAINING THE DOMESTIC HOT WATER
pressure via the valve located at the bottom of the boiler (Fig. 34). CIRCUIT.
N.B.: close the valve after the operation. To do this, always close the domestic cold water inlet upstream
If pressure values reach around 3 bar the safety valve may be of the appliance.
activated. Open any domestic hot water tap to discharge the pressure from
In this case, remove water from a radiator air vent valve until a the circuit.
pressure of 1 bar is achieved, or ask for assistance from profes-
sionally qualified personnel.
In the event of frequent pressure drops, contact qualified staff for
assistance to eliminate the possible system leakage.
40
2.11 STORAGE TANK DRAINING. 2.13 CLEANING THE CASE.
To drain the storage tank, use the special draining valve (Fig. 34). Use damp cloths and neutral detergent to clean the boiler casing.
Never use abrasive or powder detergents.
N.B.: before performing this operation, close the boil-
er cold water inlet valve and open any DHW system 2.14 DECOMMISSIONING.
hot water valve in order to let air into the storage tank.
INSTALLER
In the event of permanent shutdown of the boiler, contact profes-
sional staff for the procedures and ensure that the electrical, water
and gas supply lines are shut off and disconnected.
2.12 ANTIFREEZE PROTECTION. 2.15 GAS SYSTEM NOT USED FOR PERIODS OVER 12
The boiler has an antifreeze function that switches the burner on MONTHS.
automatically when the temperature falls below 4°C (standard The current regulation provides that gas systems not used for
protection to minimum temperature of 0°C). All information over 12 months must be checked prior to being used again, as per
relative to the antifreeze protection is stated in (Par. 1.4). In order regulations in force, by professionally qualified staff.
to guarantee the integrity of the appliance and the domestic hot If the inspection is successful, the boiler can be recommissioned
water heating system in zones where the temperature falls below according to the instructions specified in point 3 herein.
zero, we recommend the central heating system is protected using
anti-freeze liquid and installation of the Immergas Antifreeze Kit
in the boiler. In the case of prolonged inactivity (second case), we
also recommend that:
- the electric power supply is disconnected;
- the heating circuit and boiler domestic water circuit must be
USER
drained. In systems that are drained frequently, filling must be
carried out with suitably treated water to eliminate hardness that
can cause lime-scale.
BOTTOM VIEW
SYSTEM FILLING VALVE
STORAGE TANK DRAINING

FITTING
SYSTEM DRAINING FITTING
GAS COCK COLD WATER INLET COCK
34
41
3 INSTRUCTIONS
FOR
MAINTENANCE AND
3.2 INITIAL CHECK.
To commission the boiler:
INITIAL CHECK. - ensure that the type of gas used corresponds to the
boiler settings (the type of gas appears on the display
INSTALLER
on first electrical supply voltage, or by checking the

3.1 GENERAL WARNINGS. relative parameter “G”);
ATTENTION: - check connection to a 230V-50Hz power mains, correct L-N
polarity and the earthing connection;
operators who install and service the
- make sure the central heating system is filled with water and
appliance must wear the personal pro- that the boiler manometer indicates a pressure of 1÷1.2 bar;
tective equipment (PPE) required by - switch the boiler on and ensure correct ignition;
applicable law. - check the proper calibration of the number of fan revolutions;
- check the CO2 flow rate in the flue:
Note: the list of possible PPE is not
- maximum
complete as they are indicated by the - intermediate
employer. - minimum
the values must comply with what is indicated in the relative
tables (Par. 3.3);
- check activation of the safety device in the event of no gas, as
USER
ATTENTION: well as the relative activation time;

before performing any maintenance oper- - check activation of the main switch located upstream of the
boiler;
ation, make sure:
- check that the intake and/or exhaust terminals are not
- you have disconnected the power to the blocked;
appliance; - ensure activation of all adjustment devices;
- seal the gas flow rate regulation devices (if settings are mod-
- you have closed the gas cock; ified);
- you have discharged the pressure from the - ensure production of domestic hot water;
system and domestic hot water circuit. - ensure sealing efficiency of water circuits;
- check ventilation and/or aeration of the installation room
Risk of material damage after using sprays and liquids to search where provided.
for leaks. Even if just one single safety check provides a negative result,
Leak sprays and liquids clog the reference hole P.Ref (Part. 5 Fig. do not commission the system.
37) of the gas valve, damaging it irreparably.
During installation and maintenance, do not use spray or liquids
in the upper area of the gas valve (side referring to the electric
connections)
Supply of spare parts.

The device’s warranty shall be rendered null and void
if unapproved or unsuitable parts are used for main-
tenance or repairs. These will also compromise the
product’s compliance, and the said product may no
longer be valid and fail to meet the current regulations.
With regard to the above, only use Immergas original spare parts
when replacing parts.
If additional documentation needs to be consulted for

extraordinary maintenance, contact the Authorised
After-Sales Service.
42
3.3 YEARLY APPLIANCE CHECK AND - Check correct lighting and operation.
MAINTENANCE. - Check the CO2 by using the chimney sweep func-
The following checks and maintenance should be tion at the three reference heat outputs, using the
performed at least once a year to ensure operation, parameters in the table below. Should values out of
safety and efficiency of the appliance over time. the indicated tolerance range be detected, check the
INSTALLER
- Clean the flue side of the heat exchanger. integrity of the ignition / detection electrode and, if
- Clean the main burner. required, change it, also changing the relative gasket. At this
- Check the correct positioning, integrity and cleanliness of the point, activate the “complete calibration” function.
detection and ignition electrode; remove any oxide present. - Check correct operation of control and adjustment devices and
- If deposits are detected in the combustion chamber they must in particular:
be removed and the heat exchanger coils must be cleaned using - system regulation probes intervention;
nylon or broomcorn brushes; it is forbidden to use brushes - domestic hot water control thermostat intervention.
made of metal or other materials that may damage the com- - Check sealing efficiency of gas circuit and the internal system.
bustion chamber. It is also forbidden to use alkaline or acid - Check the intervention of the device against no gas ionisation
detergents. flame control. Intervention time must be less than 10 seconds.
- Check the integrity of the insulating panels inside the combus-
tion chamber and if damaged replace them. CO2 at interme-
CO2 at nominal CO2 at minimum
- Visually check for water leaks or oxidation from/on con- output
diate
output
nections and traces of condensate residues inside the sealed output
chamber. G 20 9.20% ± 0.5 9.00% ± 0.5 9.00% ± 0.5
USER
- Check the contents of the condensate drain trap. G 31 10.20% ± 0.5 10.00% ± 0.5 10.00% ± 0.5
- Check that there are no material residues in the condensate
drain siphon clogging the condensate passage; also check that In addition to yearly maintenance, one must also check the
the entire condensate drainage circuit is clear and efficient. energy efficiency of the thermal system, with frequency and
In the event of obstructions (dirt, sediment, etc.) with conse- procedures that comply with the indications of the technical
quent leakage of condensate in the combustion chamber, one regulations in force.
must replace the insulating panels.
- Check that the burner and gas manifold seal gaskets are intact
and perfectly efficient, otherwise replace them. In any case the
gaskets must be replaced at least every two years, regardless of
their state of wear.
- Check that the burner is intact, that it has no deformations or
cuts and that it is properly fixed to the combustion chamber
lid; otherwise it must be replaced.
- Visually check that the water safety drain valve is not blocked.
- Check that, after discharging the system pressure and bringing
it to zero (read on boiler pressure gauge), the expansion vessel
pressure is at 1.0 bar.
- Check that the system static pressure (with system cold and
after refilling the system by means of the filling valve) is be-
tween 1 and 1.2 bar.
- Check visually that the safety and control devices have not
been tampered with and/or shorted, in particular:
- Check the condition and integrity of the electrical system and
in particular:
- electrical power cables must be inside the fairleads;
- there must be no traces of blackening or burning.
43
3.4 HYDRAULIC DIAGRAM.
INSTALLER
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic hot water inlet
SC - Condensate drain
M - System flow
R - System return
USER
Key:
1 - Gas valve 12 - Flue sample point 23 - 3-way valve (motorised)
2 - Condensate drain trap 13 - Air sample point 24 - Domestic hot water expansion vessel
3 - 3 bar safety valve 14 - Burner 25 - D.H.W. probe
4 - System draining cock 15 - Air / gas manifold 26 - Stainless steel coil for storage tank
5 - System expansion vessel 16 - Flow probes 27 - 8 bar safety valve
6 - Air / gas mixer 17 - Air intake pipe 28 - Cold water inlet non-return valve
7 - Fan 18 - Air vent valve 29 - Storage tank draining valve
8 - Return probe 19 - Boiler pump 30 - System filling cock
9 - Ignition/detection electrode 20 - System pressure switch 31 - Bypass
10 - Flue probe 21 - Stainless steel storage tank
11 - Flue hood 22 - Magnesium anode
35
44
3.5 WIRING DIAGRAM.
signal state
Power supply Connections
230 Vac 230 V
50Hz
Low voltage connections

(optional)
Key:
A19 - Removable memory
M20 - Fan Colour code key:
B1 - Flow probe
M30 - Three-way motor stepper BK - Black
B2 - Storage tank probe
S5 - System pressure switch BL - Blue
B4 - External probe (optional)
S20 - Room thermostat (optional) BR - Brown
B5 - Return probe
R5 - DHW temperature trimmer G - Green
B24 - Safety flow probe
R6 - C.H. temperature trimmer GY - Grey
B27 - Double flue probe sensor
T1 - Boiler P.C.B. transformer OR - Orange
CARV2 - Comando Amico RemotoV2 remote control
T2 - Ignition transformer P - Purple
(optional)
X40 - Room thermostat jumper PK - Pink
E3 - Ignition and detection electrode
X70 - Safety thermostat (low temperature) jumper R - Red
M1 - Boiler pump
Y1 - Gas valve W - White
Y - Yellow
Y/G - Yellow/Green
36
45
MAINTENANCE TECHNICIAN USER INSTALLER
Any room thermostat or ON-OFF must be connected to clamps - Non-optimal ignition of first ignitions of the burner. Even
40 and 41 eliminating jumper X40. if the burner is perfectly calibrated, first ignition of the burner
Any CARV2 must be connected to terminals 44 and 41 complying (after calibration) can be sub-optimal; the system automatically
with the polarity and eliminating jumper X40. regulates ignition until it finds optimal ignition of the said burner.
The connector X5 is used for the connection to the relay board. - Frequent trips of the overheating safety device thermostat
INSTALLER
function. It can depend on the lack of water in the boiler, little

The connector X6 is for connection to a personal computer.
water circulation in the system (or blocked pump, see Par. 1.27).
The connector X8 is used for software updating operations. Check on the pressure gauge that the system pressure is within
established limits. Check that the radiator valves are not closed
3.6 REMOVABLE MEMORY. and also the functionality of the pump.
The P.C.B. is equipped with a removable memory (Ref. 2 Fig. - Siphon blocked. This may be caused by dirt or combustion
38), which records all operation parameters and system custo- products deposited inside. Check that there are no residues of
misations. material blocking the flow of condensate.
Should the P.C.B. be replaced, you can use the memory of the
replaced board again, so it is not necessary to reconfigure the - Heat exchanger blocked. This may be caused by the drain trap
appliance. being blocked. Check that there are no residues of material
blocking the flow of condensate.
ATTENTION: - Noise due to air in the system. Check opening of the special air
replacing the memory must be carried vent valve cap (Part. 23 Fig. 32). Make sure the system pressure
and expansion vessel pre-charge values are within the set limits.
out after disconnecting all electrical The factory-set pressure values of the expansion vessel must be
connection of the P.C.B. 1.0 bar, the value of system pressure must be between 1 and 1.2
USER
bar.
3.7 TROUBLESHOOTING. - Noise due to air inside the condensation module. Use the manual
Maintenance operations must be carried out by an air vent valve (Part. 23 Fig. 32) to eliminate any air present in the
authorised company (e.g. Authorised After-Sales condensation module. When the operation has been performed,
Technical Assistance Service). close the manual vent valve.
- Poor production of D.H.W. If a drop in performance is detected
- Smell of gas. Caused by leakage from gas circuit pipelines. Check during supply of D.H.W., it is possible that the condensation
sealing efficiency of gas intake circuit. module or D.H.W. heat exchanger is clogged. In this case, contact
Immergas After-Sales Assistance Service that has procedures to
- Repeated ignition blocks. No gas, check the presence of pressure

in the network and that the gas adduction cock is open. clean the module or D.H.W. heat exchanger.
- Irregular combustion or noisiness. It may be caused by: a
dirty burner, incorrect combustion parameters, intake-exhaust
terminal not correctly installed. Check the above components.
SGV 100 B&P GAS valve P.C.B.
1
Key:
1 - Gas valve outlet pressure 2
point
2 - Coil 5
3 - Wiring connector
4 - Gas valve inlet pressure 3
point
5 - P. Ref.
4
Key:
1 - Fuse 3.15 AF
2 - Removable memory
37 (A19) 38
46
3.8 CONVERTING THE BOILER TO OTHER
TYPES OF GAS.
The gas conversion operation must be carried out by
an authorised company (e.g. Authorised Technical
After-Sales Service).
INSTALLER
To convert to another type of gas the following oper-
ations are required:
- Select, via programming menu “G”, the type of gas by
selecting “nG” for methane gas and “LG” for LPG gas.
(Par. 3.15).
- Carry out complete calibration (Par. 3.11); during the pro-
cedure check and, if necessary, correct the CO2 value.
- Upon completing the conversion, apply the sticker regarding
the modified gas content onto the data nameplate in the con-
nection box.
These adjustments must be made with reference to the type of
gas used, following that given in the table (Par. 4.1).
3.9 CHECKS FOLLOWING CONVERSION TO

ANOTHER TYPE OF GAS.
USER
After having made sure that the conversion is complete and that
the calibration has been successful, you must make sure that:
- there is no flame in the combustion chamber;
- the burner flame is not too high or low and that it is stable (does
not detach from burner);
- the pressure testers used for calibration are perfectly closed and
there are no leaks from the gas circuit.
Maintenance operations must be carried out by an
authorised company (e.g. Authorised After-Sales
Technical Assistance Service).
47
3.10 CALIBRATION TYPE INVOLVING THE In order to access the complete calibration stage, you must switch
REPLACEMENT OF A COMPONENT. the boiler on, set the DHW selector in the “6 o'clock” position
When performing extraordinary maintenance on the boiler, and the heating selector in the “9 o'clock” position, (Fig. 39) and
involving the replacement of a component, such as the P.C.B. (if press the “ ” button for about 8 seconds until the “chimney
the removable memory is not put into the replacement board) or sweep” function is activated; then press the “ ” button within
INSTALLER
components in the air, gas and flame control circuits, the boiler 3 seconds. If the temperature read from the storage tank during
will need to be calibrated. this phase is below 60 °C, the boiler can be switched on. Follow
Select the type of calibration to be carried out according to the the operations described
table below. to start calibration.
If the energy produced in
Replaced the central heating circuit
Type of calibration required
component needs to be discharged,
Gas valve Quick calibration turn the selector to 0 after
Fan Quick calibration the calibration function is
Burner
Complete calibration with CO2 39 enabled.
check
Complete calibration with CO2 • Nominal heat output: with the function active, the boiler carries
Ignition/detection electrodes
check out the procedures required to calibrate the appliance at the
nominal heat output.
Restore the parameters as de-
P.C.B. scribed in the paragraph "P.C.B. At this stage, the display features flashing icons: “ ”, “ ”,
(New virgin P.C.B. without re- programming"
USER
movable memory recovery) Complete calibration with CO2 “ ” and the operating temperature alternated with the current
check operating heat output (99%);
once the parameters are
P.C.B. detected and stabilised,
(Recovery of the removable the frame of the flame
No calibration required.
memory with the boiler param- presence symbol will start
eters set from the replaced board)
flashing ( ) (this
3.11 COMPLETE CALIBRATION FUNCTION. procedure may last a few
N.B.: before carrying out complete calibration, ensure that all minutes), meaning that
40 the nominal heat output
the requirements indicated in Par. 1.23 and 1.24 have been met.
parameters have been set.
In the event of anomaly “62” or “72” (Par. 2.5) the boiler cancels
It is only possible to correct the CO2 (Par. 3.12) value after the
any requests by itself.
flame presence ( ) frame flashes, or switch to the next
N.B.:During the various calibration stages, the CO2 value can be heat output parameter by pressing the “ ” button.
checked and possibly corrected as described in (Par.3 12.
• Intermediate heat output ignition: once the nominal heat
The energy produced is dissipated via the heating circuit; al- output calibration is confirmed, the boiler is calibrated with the
ternatively, the energy can be released from the DHW circuit by intermediate heat output (or ignition heat output).
opening any hot water tap.
At this stage, the display features flashing icons: “ ”, “ ”,
ATTENTION: “ ” and the operating temperature alternated with the current
in this case the only active temperature operating heat output (typically 41% but variable according to
control is the flow probe that limits the the boiler model);
maximum temperature exiting the boiler at detected and stabilised, the
90°C, therefore be careful not to get burned. frame of the flame pres-
ence symbol ( )
- The calibration procedure involves various stages: will start flashing, mea-
- nominal heat output calibration; ning that the intermedia-
- intermediate heat output ignition calibration; te heat output parameters
41 have been set.
- minimum heat output calibration;
It is only possible to correct the CO2 (Par. 3.12) value after the
- calibration self-check.
flame presence ( ) frame flashes, or switch to the next
Each calibration procedure, if carried out without altering the heat output parameter by pressing the “ ” button.
parameters, lasts 5 minutes at the most, after which it switches
automatically to the next parameter until the calibration process
is complete.
48
• Minimum heat output: after having calibrated the boiler with 3.13 FAST CALIBRATION.
the intermediate heat output, it is calibrated with the minimum This function allows you to calibrate the boiler automatically
heat output. without requiring or giving the possibility to alter the parameters.
Typically “fast calibration” is used after having set the type of flue
At this stage, the display features flashing icons: “ ”, “ ”,
in menu “F”, which once altered causes anomaly “72”.
INSTALLER
“ ” and the operating temperature alternated with the current
N.B.: before performing quick calibration, ensure that all the
operating heat output (0%);
requirements indicated in (Par. 1.23 and 1.24.
detected and stabilised, the N.B.: to access this function it is crucial that there are no active
frame of the flame pres- requests for central heating or DHW production.
ence symbol ( ) In the event of anomaly “62” or “72” (Par. 2.5) the boiler cancels
will start flashing, mea- any requests by itself.
ning that the minimum
The energy produced is dissipated via the heating circuit; al-
42 heat output parameters ternatively, the energy can be released from the DHW circuit by
have been set.
opening any hot water tap.
If is only possible to correct the CO2 (Par. 3.12) value after the
flame presence frame ( ) flashes, or exit the calibration ATTENTION:
phase by pressing “ ”. in this case the only active temperature
• Calibration self-check: once calibration operations are complete, control is the flow probe that limits the
the boiler runs a self-check for about one minute. During this
maximum temperature exiting the boiler at
check, the boiler can run at different powers and it is not possible
USER
to apply modifications to the operating parameters or to delete 90°C, therefore be careful not to get burned.
the operation in progress. Moreover, it is important not to cut
the boiler's power. In order to access the fast calibration stage, set the DHW selec-
tor in the “6 o'clock” position and the heating selector in the “9
3.12 CO2 ADJUSTMENT. o'clock” position, (Fig. 44) and press the “ ” button for
During complete calibration (Par. 3.11), you can modify the about 8 seconds until the “chimney sweep” function is activated;
values of CO2. then press the “ ” button within 3 seconds. If the temperature
read from the storage tank during this phase is below 60 °C, the
To have an exact value of CO2 in the flue, the technician must
boiler can be switched on.
insert the sampling probe to the bottom of the sample point, then
If the energy produced in
check that the CO2 value is that specified in the table (Par. 3.3). If
the central heating circuit
otherwise, change the value as described hereunder:
is to be discharged, turn
- during calibration, when the frame of the flame presence starts the selector to “0” after
flashing ( ) (indicating the correct acquisition of the the calibration function is
parameters) it is possible to alter the CO2 value by pressing the enabled.
“ ” button. 44 Once the quick calibra-
At this stage, the display tion function is active, the boiler sequentially carries out the
features flashing icons: procedures required to calibrate the appliance with the nominal,
“ ”, “ ”, “ ”, intermediate and minimum heat output values.
“ ”, “ ” and At this stage, the display
display of the operating features flashing icons:
temperature is alternated “ ”, “ ”, “ ” and
43 with the set combustion.
“ ” and the operating
- To increase the combustion setting, press button “ ”; to de- temperature will be dis-
crease it, press the “ ”. As the combustion setting increases, played, alternated with
the CO2 value decreases and vice-versa. 45 the current operating
- Once the parameter has been altered wait for the value to be saved heat output.
(displayed via the frame of the flame presence symbol flashing The calibration stages (nominal, intermediate and minimum) pro-
). gress automatically and you must wait until calibration is complete.
- To confirm the set value press ” ”.
49
3.14 FLUE TEST. 3.15 PROGRAMMING THE P.C.B.
To define the value to set in the ”flue length” “F0” parameter, detect The boiler is prepared for possible programming of several operation
the parameters during the “flue test”. parameters. By modifying these parameters as described below, the
boiler can be adapted according to specific needs.
N.B.: before performing the test, ensure that the
condensate drain trap has been filled correctly and To access the program-
INSTALLER
check that there are no obstructions in the air intake ming stage, set the DHW
circuit and flue exhaust and that the sealed chamber is selector in the “6 o'clock”
perfectly closed and the flue has already been installed. position and the heating
selector in the “9 o'clock”
Once the test has been carried out properly, note the detected value position and press the
in the relevant table, in order to have it available for future checks. “ ” and “ ”
47
To activate this mode, the (Fig. 47)buttons
boiler must be in “stand- for about 8 seconds.Once the programming mode has been ac-
by” mode, which is visible cessed, scroll through the five menus (G, P, t, A, F) by pressing the
w h e n t h e “ ” button for 1 second.
( ) symbol appears.
Use the ''D.H.W. regulator'' selector to select the parameter (within
the same sub-menu and when several parameters are available)
46
and turn the ''C.H. regulator'' selector to alter the value.
Press the " " button (3) for 1 second to memorise the vari-
N.B.: if the boiler is connected to the CARV2 the “stand-by” func- ation of the parameters.
USER
tion can only be activated via the remote control panel. Memorisation is represented via "88" on the indicator (Ref. 14 Fig.
To activate the function, press the buttons “ ” and 14 Fig. 33) for 2 seconds.
“ ” simultaneously until function activation, which is displayed Exit the programming mode by waiting for 15 minutes or by press-
by indicating the fan operation speed (in hundreds of revs) and
ing the “ ” and “ ” buttons at the same time.
ignition of the flashing “D.H.W.” ( ) and “central heating”
( ) symbols. ATTENTION:
The appliance remains in this mode for a maximum period of 15 if necessary the default values relating
minutes, keeping the fan speed constant.
to parameters “S” and “P0 ÷ P2” can be
This function ends once 15 minutes have elapsed, or by discon- altered by temporarily modifying the type of
necting supply voltage to the boiler, or by pressing the “ ” button
for approximately 8 seconds.
gas (parameter “G”) and by restoring it accord-
Check the ΔP between the two pressure test outlets (Ref. 13 Fig.
ing to the actual operating conditions (wait
32) according to the values shown in the tables below: for approximately 10 seconds between the gas
Victrix Zeus 25
change and the when it is restored).
Parameter F0 Pressure The restored values will be those relating to the type of boiler set
0 < 90 Pa in parameters “n” and “F”.
At the end of this operation, anomaly “E62” will appear and com-
1 90 ÷ 120 Pa
plete calibration will be required.
2 120 ÷ 150 Pa - Menu “G”. This menu is reserved for the air-gas control settings
Value detected on first check and it features two sub-menus (n and S), relating to fan and gas
valve control settings. Every time these parameters are altered,
N.B.: examinations are carried out by sealing the holes provided
the complete calibration function must be activated (Par. 3.11).
to analyse the flues, making them pneumatically sealed.
N.B.: should there be a boiler malfunction, you can carry out a
flue test to check that there are no obstructions in the flue system.
Different values to those indicated in the previous tables indicate
a flue system malfunction, especially a flue system with excessive
load losses or obstructed system.
50
In order to access parameters “n” and “S” press the “ ”
button sequentially. In order to exit this part of the menu and
access other parts (categories P, t, A, F) press the “ ” button.
- IL. The “IL” gas type is not used; to exit, press “ ”. If the
INSTALLER
“IL” GAS is memorised, you must memorise the correct type
of GAS again.
Id Customised
Parameter Description Range Default
Parameter value
Defines operation with methane gas nG
G Gas type Defines operation with LPG gas LG nG
Not used IL
In the event of an alteration, anomaly “E62” appears and complete calibration is required.
Id Customised
Parameter value
n Boiler model Define the boiler model 0÷n 16
Caution: only use the parameter relating to the boiler installed.
USER
Id Customised
Parameter value
The P.C.B. defines the operating mode and the boiler output accord- 750 ÷ 1700
S0 Min output 1150
ing to the combination of several parameters. The proper operating rpm
output of the appliance is defined according to the combination of S0 ÷ 6900
S1 Max output the parameters of menus “n” and “F”. 3200
rpm
For this reason it is recommended not to alter the parameters of
this menu in order not to compromise the proper operation of the 2000 ÷ 4500
S2 Ignition output 6200
boiler. rpm
Id Customised
Parameter value
Defines the maximum heat output percentage of the boiler during
P0 DHW max 0 - 99 % 99%
the D.H.W. phase compared to the maximum heat output available
Defines the minimum heat output percentage of the boiler compared
P1 Min output 0 - P2 0%
to the minimum heat output available
Central heating Defines the maximum heat output percentage of the boiler during the
P2 0 - 99% 80%
max central heating mode compared to the maximum heat output available
The boiler is set-up for functioning with the relay board (optional),
which can be configured
0 = Off
1 = Main zone control
Relay 1 2 =General alarm
P3 0-7 1
(optional) 3 = CH mode active
4 = External gas valve power supply
5 = (Do not use on this boiler model)
0 = Off
1 =General alarm
Relay 2 2 = CH phase mode
P4 0-7 0
(optional) 3 = External gas valve power supply
4 = Secondary zone control (from TA on relay board contact)
5 = Heat pump
51
0 = Off
1 = Chiller remote activation
2 =General alarm
Relay 3 3 = CH mode active
INSTALLER
P5 0-9 0
(optional) 4 = External gas valve power supply
5 = heat pump
6 = Storage tank activation with recirculation
7 = Main zone control
9 = (Do not use on this boiler model).
The pump can function in two ways.
0 intermittent: in winter "mode" the circulator is managed by
Pump the room thermostat or by the remote control
P6 0-1 0
functioning
1 continuous: in "winter" mode the circulator is always powered
and is therefore always in operation
If the reading of the external probe is not correct it is possible
to correct it in order to compensate any environmental factors.
External probe
P7 (Over the value of +9 the display shows “CE”, which enables -9 ÷ 9 K 0
correction
an external control function of the boiler for coupling of the
same with a system supervisor)
USER
P8 - Not used on this boiler model - -
Central heating
t0 set point mini- Defines the minimum flow temperature. 20 ÷ 50 °C 25
mum temperature
Central heating
(t0+5) ÷ 85
t1 set point maxi- Defines the maximum flow temperature. 85
°C
mum temperature
Defines the flow temperature during the storage tank central

heating phase
D.H.W. 0: Flow temperature = Set DHW + 25°C
t2 0-3 1
thermostat 1: Flow temperature depends on the boiler’s power
2: Flow temperature = 1.1*Set DHW + 6°C
3: Flow temperature = 85°C
t3 Solar delay timing Not used - -
In winter mode the boiler, at the end of a domestic hot water
request, is ready to switch to central heating mode if there is
Domestic hot 0 - 100 sec-
an active request. Timing sets a time period in which the boiler
t4 water priority onds 2
timing waits before changing the operating mode, in order to quickly (step 10 sec)
and comfortably satisfy an additional request for domestic
hot water.
0 - 600 sec-
Central heating The boiler has an electronic timer, which prevents the burner from
t5 onds 18
ignitions timer igniting too often in central heating mode
(step 10 sec)
0 - 840
Central heating In central heating mode, the boiler performs an ignition ramp
t6 seconds 18
ramp timer in order to reach the maximum output set (step 10 sec)
CH ignition delay The boiler is set to switch-on immediately after a request. In the 0 - 600 sec-
t7 from TA and CR event of particular systems (e.g. area systems with motorised onds 0
request thermostatic valves etc.) it may be necessary to delay ignition (step 10 sec)
52
Establishes the display lighting mode.
0 Automatic: the display lights up during use and dims after 15
seconds of inactivity. In the event of an anomaly the display
t8 Display lighting flashes. 0-2 0
1 Low: the display is always lit with low intensity
INSTALLER
2 High: the display is always lit with high intensity.
Establishes what the indicator displays 14 (Fig. 33).
"Summer" mode:
0: the indicator is always off
1: pump active displays the flow temperature,
pump off the indicator is off
t9 Display 0-1 1
"Winter" mode:
0: always displays the value set on the CH selector
1: pump active displays the flow temperature,
pump off always displays the value set on the CH selector
USER
Id Customised
Parameter value
Set
A0 Hydraulic model Defines the type of hydraulics in the boiler 2
2
A1 - Not used on this boiler model - 0
Model Set
A2 Defines the type of circulator in the boiler 3
Pump 3
Maximum pump
A3 Sets the maximum pump operating speed 1÷9 9
speed
Minimum pump
A4 Sets the minimum pump operating speed 1 ÷ A3 6
speed
Sets the pump operating mode
Pump operating - DELTA T = 0: proportional head (see (Parag. 1.27)
A5 0 ÷ 25 15
mode
- DELTA T = 5 ÷ 25 K: ∆T constant (Parag. 1.27)
Sets the activation mode of the automatic vent at each new
electric powering phase of the boiler.
This function lasts 8 minutes, and is displayed via a countdown
signalled by the special indicator (Ref. 14 Fig. 33). During this
period the DHW and CH functions are not active. The “automatic
vent” function can be annulled by pressing the “ ” button.
Ignition phase 1: the automatic vent is enabled at each new electric power
A7 0-1 1
automatic vent
supply.
0: the automatic vent is enabled only at the first electric power
supply after having set the parameter to “0”; once the func-
tion has ended, or is interrupted by pressing the “ ”
button, it will not be enabled again unless the parameter is
set to “1”.
Id Customised
Parameter value
Length
F0 Defines the length of the flue (Par. 3.14) 0-2 0
flue
F1 - Not used on this boiler model - 0
In the event of an alteration, anomaly “E72” appears and fast calibration is required.
53
3.16 "CHIMNEY SWEEP” FUNCTION. 3.19 RADIATORS ANTIFREEZE FUNCTION.
When activated, this function forces the boiler to variable output If the system return water is below 4°C, the boiler starts up until
for 15 minutes. reaching 42°C.
In this state all adjustments are excluded and only the safety
thermostat and the limit thermostat remain active. To activate the 3.20 PERIODICAL P.C.B. SELF-CHECK.
INSTALLER
chimney sweep function, press the “ ” button until activation During functioning in central heating mode or with boiler in
of the function in the absence of DHW requests. standby, the function activates every 18 hours after the last boiler
check/power supply. In case of functioning in domestic hot water
Its activation on the boiler display is confirmed by indicators “ ”
mode the self-check starts within 10 minutes after the end of the
and “ ”flashing at the same time, while on the CARV2 (optional) withdrawing in progress, for duration of approx. 10 seconds.
it is reported as “ERR>07”.
N.B.: during self-check, the boiler remains off.
This function allows the technician to check the combustion
parameters. 3.21 AUTOMATIC VENT FUNCTION.
Once the function is activated, it is possible to select whether to In the case of new central heating systems and in particular mode
make the chick in CH status or DHW status by opening any hot for floor systems, it is very important that deaeration is performed
water cock and regulating the power by turning the "CH regula- correctly. The function consists of the cyclic activation of the
tion" selector (6). pump (100 s ON, 20 s OFF) and the 3-way valve (120 s D.H.W.,
The central heating or DHW operating mode is displayed by the 120 s C.H.).
relative symbols or . The function is activated in two different ways:
After the checks, deactivate the function switching the boiler off - at each new boiler power supply, based on the setting of param-
and then on again. eter “A7”;
USER
Attention: the boiler needs a certain amount of time to stabilise - by pressing buttons “ ” and “ ” at the same time for 5
itself before carrying out a combustion parameters check. It is thus seconds with boiler in stand-by.
necessary to wait for the boiler to carry out a self-diagnosis test, N.B.: if the boiler is connected to the CARV2 the “stand-by”
which is signalled by the ( ) flashing symbol. Once the symbol function can only be activated via the remote control panel.
stops flashing, it is possible to check the combustion parameters.
In the first case, the function has duration of 8 minutes and it
can be interrupted by pressing the “ ” button (18). In the
3.17 PUMP ANTI-BLOCK FUNCTION. second case it has duration of 18 hours and it can be interrupted
The boiler has a function that starts the pump at least once every by simply switching the boiler on.
24 hours for the duration of 30 seconds in order to reduce the
Activation of the function is signalled by the countdown shown

risk of the pump becoming blocked due to prolonged inactivity.
on the indicator (Ref. 14 Fig. 33).
3.18 THREE-WAY ANTI-BLOCK SYSTEM.
Both in “domestic hot water” and in “domestic hot water-central
heating” phase the boiler is equipped with a function that starts the
three-way motorised group 24 hours after it was last in operation,
running it for a full cycle so as to reduce the risk of the three-way
group becoming blocked due to prolonged inactivity.
54
3.22 CASING REMOVAL. • Front (Fig. 50).
To facilitate boiler maintenance the casing can be completely 6) Loosen the two screws (g).
removed as follows:
7) Pull the front (f) slightly towards you.
• Lower grid (Fig. 48).
8) Release the front (f) from the bracket (h) by pushing upwards
1) Loosen the two screws (a).
and towards you.
INSTALLER
2) remove the grid (b).
• Front panel (Fig. 49).
3) Remove the cover caps (c) and loosen screws (d).
4) Loosen the two screws (e) secured under the hinges.
5) Pull the front panel (f) towards you and release it from its lower
seat.
USER
2
3
2 d
c
4 5
e 3
d 4
f
c
b e
a
1
a
48 49
1
8
8
h
7
f
7
g 6
50
55
• Control panel (Fig. 51). • Sides (Fig. 52).
9) Loosen the fixing screws (i) from the front panel. 12) Unscrew the side (k) fastening screws (l).
10) Press the hooks on the side of the control panel. 13) Remove the sides by extracting them from their rear seat (Ref.
11) Tilt the control panel (j) towards you. X).
INSTALLER
10
9
11
10
i
9
j
i
USER
10
10
51
Ref.
Rif.XX
12 X
l X
X
12
13
l
13
X X
12 k
12 k
52
56
4 TECHNICAL DATA.

4.1 VARIABLE HEAT OUTPUT.

N.B.: the power data in the table has been obtained with intake-
exhaust pipe measuring 0.5 m in length. Gas flow rates refer to
net calorific value below a temperature of 15°C and at a pressure
of 1013 mbar.
METHANE PROPANE
(G20) (G31)
HEAT GAS FLOW RATE GAS FLOW RATE
MODULATION MODULATION
THERMAL BURNER BURNER
(kW) (kcal/h) (%) (m3/h) (%) (kg/h) (g/s)
25.0 21500 99 2.74 99 2.01 0.56
24.0 20640 96 2.63 96 1.93 0.54
23.0 19780 D.H.W. 92 2.52 92 1.85 0.51
22.0 18920 88 2.41 88 1.77 0.49
21.0 18060 84 2.30 84 1.69 0.47
20.0 17200 80 2.19 80 1.61 0.45
19.0 16340 76 2.08 76 1.53 0.42
18.0 15480 72 1.97 72 1.45 0.40
17.0 14620 68 1.86 68 1.37 0.38
16.0 13760 63 1.75 63 1.29 0.36
15.0 12900 59 1.64 59 1.21 0.34
14.0 12040 54 1.53 54 1.13 0.31
13.0 11180 HEAT. 50 1.42 50 1.05 0.29
12.0 10320 45 1.32 45 0.97 0.27
+
11.0 9460 40 1.21 40 0.89 0.25
10.0 8600 D.H.W. 35 1.10 35 0.81 0.22
9.0 7740 30 0.99 30 0.73 0.20
8.0 6880 25 0.88 25 0.65 0.18
7.0 6020 20 0.77 20 0.56 0.16
6.0 5160 15 0.66 15 0.48 0.13
5.0 4300 10 0.55 10 0.40 0.11
4.0 3440 4 0.44 4 0.32 0.09
3.5 3010 1 0.39 1 0.28 0.08
4.2 COMBUSTION PARAMETERS.

G20 G31
Supply pressure mbar (mm H2O) 20 (204) 37 (377)
Gas nozzle diameter mm 5.0 5.0
Flue flow rate at nominal DHW/heat output kg/h (g/s) 42 (11.67) - 34 (9.44) 43 (11.94) - 35 (9.72)
Flue flow rate at min heat output kg/h (g/s) 6 (1.67) 6 (1.67)
9.20 / 9.00 / 9.00 10.20 / 10.00 / 10.00
CO2 at Q. Nom./Acc./Min. %
(± 0.2) (± 0.2)
CO with 0% O2 at Nom./Min. Q. ppm 240 / 7 263 / 7
NOX with 0% O2 at Nom./Min. Q. mg/kWh 72 / 27 39 / 34
Flue temperature at nominal output °C 63 63
Flue temperature at minimum output °C 54 54
Max air combustion temperature °C 50 50
Intake / exhaust available head F0 = 0 Pa 68 68
Combustion parameters: measuring conditions of useful efficiency

(flow temperature/return temperature= 80 / 60 °C), ambient tem-
perature reference = 15°C.
57
4.3 TECHNICAL DATA TABLE.
Domestic hot water nominal heat input kW (kcal/h) 25.9 (22280)
Central heating nominal heat input kW (kcal/h) 20.7 (17800)
Minimum heat input kW (kcal/h) 3.6 (3135)
Domestic hot water nominal heat output (useful) kW (kcal/h) 25.0 (21500)
Central heating nominal heat output (useful) kW (kcal/h) 20.0 (17200)
Minimum heat output (useful) kW (kcal/h) 3.5 (3010)
*Effective thermal efficiency 80/60 Nom./Min. % 96,6 / 96.0
*Effective thermal efficiency 50/30 Nom./Min. % -
*Effective thermal efficiency 40/30 Nom./Min. % -
Casing losses with burner On/Off (80-60°C) % 0.73 - 0.9
Chimney losses with burner On/Off (80-60°C) % 0.04 - 2.6
Central heating circuit max. operating pressure bar (MPa) 3.0 (0.3)
Maximum heating temperature °C 90
Adjustable central heating temperature (min. operating field) °C 20 - 50
Adjustable central heating temperature (max. operating field) °C 25 - 85
Central heating System expansion vessel total volume l 5.8
Central heating expansion tank pre-charge bar (MPa) 1.0 (0.1)
Total volume domestic hot water expansion vessel l 1.5
Domestic hot water expansion vessel pre-charge bar (MPa) 2.5 (0.25)
Appliance water content l 4.7
Head available with 1000 l/h flow rate kPa (m H2O) 26.31 (2.68)
Hot water production useful heat output kW (kcal/h) 25.0 (21500)
Domestic hot water adjustable temperature °C 10 - 60
Domestic hot water circuit min. pressure (dynamic) bar (MPa) 0.3 (0.03)
Domestic hot water circuit max. operating pressure bar (MPa) 8.0 (0.8)
Flow rate capacity in continuous duty (∆T 30°C) l/min 12.0
Weight of full boiler kg 105.4
Weight of empty boiler kg 57.6
Electrical connection V/Hz 230 / 50
Nominal power absorption A 0.65
Installed electric power W 88
Pump absorbed power W 43
EEI value - ≤ 0.20 - Part. 3
Fan power absorbed power W 33
Equipment electrical system protection - IPX5D
Max temperature of combustion products °C 75
Max. flue overheating temperature °C 120
Ambient operating temperature range °C -0 ÷ + 40
Ambient operating temperature range with optional antifreeze kit °C -15 ÷ + 40
NOX class - 6
Weighted NOX mg/kWh 39
Weighted CO mg/kWh 21
Type of appliance II 2H3P
C13 - C13x - C33 - C33x - C43 - C43x - C53 - C63 - C83 - C93 -
Category
C93x- B23 - B33 - B53
- The data relating to domestic hot water performance refer to

a dynamic inlet pressure of 2 bar and an inlet temperature of
15°C; the values are measured immediately at the boiler outlet,
considering that to obtain the data declared, mixing with cold
water is required.
- * Efficiencies refer to the net calorific value.
- The weighted NOx value refer to the net calorific value.
58
4.4 KEY FOR DATA NAMEPLATE.
Md Cod. Md
Sr N° CHK Cod. PIN
Type
Qnw/Qn min. Qnw/Qn max. Pn min. Pn max.
PMS PMW D TM
NOx Class
CONDENSING
Note: the technical data is provided on the data nameplate on the boiler
ENG
Md Model
Cod. Md Model code
Sr N° Serial Number
CHK Check
Cod. PIN PIN code
Type Type of installation
(ref. CEN TR 1749)
Qnw min. Minimum DHW heat input
Qn min. Central heating minimum heat input
Qnw max. DHW maximum heat input
Qn max. Central heating maximum heat input
Pn min. Minimum heat output
Pn max. Maximum heat output
PMS Maximum system pressure
PMW Maximum domestic hot water pressure
D Specific flow rate
TM Maximum operating temperature
NOx Class NOx Class
CONDENSING Condensing boiler
59
4.5 TECHNICAL PARAMETERS FOR COMBINATION BOILERS (IN COMPLIANCE WITH REGULATION 813/2013).
The efficiencies and NOx values in the following tables refer to the gross calorific value.
Model/s: Victrix Zeus 25
Condensing Boilers: YES
Low temperature boiler: NO
Boiler type B1: NO
Co-generation appliance for central heating: NO Fitted with supplementary heating system: NO
Mixed heating appliance: YES
Element Symbol Value Unit Element Symbol Value Unit
Seasonal energy efficiency of central
Nominal heat output Pn 20 kW ηs 91 %
heating
For central heating only and combination boilers: useful heat output For central heating only and combination boilers: useful efficiency
At nominal heat output in high tempera- At nominal heat output in high tem-
P4 20.0 kW η4 87.0 %
ture mode (*) perature mode (*)
At 30% of nominal heat output in a low At 30% of nominal heat output in a low
P1 6.6 kW η1 95.7 %
temperature mode (**) temperature mode (**)
Auxiliary electricity consumption Other items
At full load elmax 0.018 kW Heat loss in standby Pstby 0.104 kW
At partial load elmin 0.013 kW Ignition burner energy consumption Pign 0.000 kW
mg /
In standby mode PSB 0.005 kW Emissions of nitrogen oxides NOX 35
kWh
For mixed central heating appliances
Domestic hot water production ef-
Stated load profile XL ηWH 80 %
ficiency
Daily electrical power consumption Qelec 0.200 kWh Daily gas consumption Qfuel 22.023 kWh
Contact information IMMERGAS S.p.A. VIA CISA LIGURE, 95 - 42041 BRESCELLO (RE) ITALY
(*) High temperature mode means 60°C on return and 80°C on flow.
(**) Low temperature mode for condensation Boilers means 30°C , for low temperature boilers 37°C and for other appliances 50°C of return
temperature.
60
4.6 PRODUCT FICHE (IN COMPLIANCE WITH REGULATION 811/2013).
Victrix Zeus 25
Parameter value
Annual energy consumption for the central heating
37 GJ
mode (QHE)
Annual electricity consumption for the domestic hot
44 kWh
VICTRIX ZEUS 25
water function (AEC)
Annual fuel consumption for the domestic hot water
18 GJ
XL function (AFC)
Seasonal space heating energy efficiency (ηs) 91 %
A++ A A Water heating energy efficiency ( ηwh) 80 %
A+
B
A A
B C
C D
D E
E
F
F
G G
20
52 dB kW
2015 811/2013
For proper installation of the device, refer to chapter 1 of this

booklet (for the installer) and current installation regulations.
For proper maintenance refer to chapter 3 of this booklet (for
the maintenance technician) and adhere to the frequencies and
methods set out herein.
61
4.7 PARAMETERS FOR FILLING IN THE PACKAGE The remaining values must be obtained from the technical data
FICHE. sheets of the products used to make up the assembly (e.g. solar
In case you should wish to install an assembly, starting from the devices, integration heat pumps, temperature controllers).
Victrix Zeus 25 boiler, use the assembly charts in (Fig. 55 and 58). Use board (Fig. 55) for “assemblies” related to the central heating
To complete it properly, fill the relevant spaces (as shown in the mode (e.g.: boiler + temperature controller).
package fiche facsimile (Fig. 53 and 56) with the values shown in Use board (Fig. 58) for “assemblies” related to the domestic hot
tables (Fig. 54 and 57). water function (e.g.: boiler + solar thermal system).
Facsimile for filling in the package fiche for room central heating systems.
1
Seasonal central heating energy efficiency of the boiler
‘I’ %
Temperature control Class I = 1 %, Class II = 2 %, 2
From temperature Class III = 1.5 %, Class IV = 2 %,
Class V = 3 %, Class VI = 4 %, + %
control board Class VII = 3.5 %, Class VIII = 5 %
Supplementary boiler Seasonal central heating energy efficiency
(in %)
From boiler board 3
( - ‘I’ ) x 0.1 = ± %
Solar contribution Classification of the
From the board of the solar device tank
Efficiency of the A* = 0.95, A = 0.91,
Dimensions of the Volume of the
manifold (in %) B = 0.86, C = 0.83,
manifold (in m2) tank (in m3)
D-G = 0.81 4
( ‘III’ x + ‘IV’ x ) x (0.9 x ( / 100) x = + %
Supplementary heat pump Seasonal central heating energy efficiency
From the heat pump (in %) 5
board
( - ‘I’ ) x ‘II’ = + %
Solar contribution and supplementary heat pump
4 5 6
Select the lowest
value 0.5 x O 0.5 x = - %
7
Seasonal central heating energy efficiency of the set
%
Seasonal central heating energy efficiency class of the set
G F E D C B A A+ A++ A+++
< 30 % ≥ 30 % ≥ 34 % ≥ 36 % ≥ 75 % ≥ 82 % ≥ 90 % ≥ 98 % ≥ 125 %≥ 150 %
Boiler and supplementary heat pump installed with low temperature heat emitters
at 35 °C?
7
From the board of the heat
pump
+ ( 50 x ‘II’ ) =
%
The energy efficiency of the set of products indicated in this sheet may not reflect the actual
energy efficiency after installation since such efficiency is affected by additional factors,
such as the heat loss in the distribution system and the size of the products compared to
the size and features of the building.
53
62
Parameters for filling in the assembly chart.
Parameter Victrix Zeus 25

‘I’ 91
‘II’ *
‘III’ 1.34
‘IV’ 0.52

* to be established by means of table 5 of Regulation 811/2013 in case of “assembly” includ-
ing a heat pump to integrate the boiler. In this case the boiler must be considered as the
main appliance of the assembly. 54
Room central heating system package fiche.
1
Seasonal central heating energy efficiency of the boiler ____ %
Temperature control Class I = 1 %, Class II = 2 %, 2
From temperature Class III = 1.5 %, Class IV = 2 %,
Class V = 3 %, Class VI = 4 %, + %
control board Class VII = 3.5 %, Class VIII = 5 %
Supplementary boiler Seasonal central heating energy efficiency
(in %)
From boiler board 3
( - ______ ) x 0.1 = ± %
Solar contribution Classification of the
From the board of the solar device tank
Efficiency of the A* = 0.95, A = 0.91,
Dimensions of the Volume of the
manifold (in %) B = 0.86, C = 0.83,
manifold (in m2) tank (in m3)
D-G = 0.81 4
( ____ x + ____ x ) x (0.9 x ( / 100) x = + %
Supplementary heat pump Seasonal central heating energy efficiency
From the heat pump (in %) 5
board
( - _____ ) x _______ = + %
Solar contribution and supplementary heat pump
4 5 6
Select the lowest
value 0.5 x O 0.5 x = - %
7
Seasonal central heating energy efficiency of the set
%
Seasonal central heating energy efficiency class of the set
< 30 % ≥ 30 % ≥ 34 % ≥ 36 % ≥ 75 % ≥ 82 % ≥ 90 % ≥ 98 % ≥ 125 %≥ 150 %
Boiler and supplementary heat pump installed with low temperature heat emitters
at 35 °C?
7
From the board of the heat
pump
+ ( 50 x ______ ) =
%

55
63
Facsimile for filling in the domestic hot water production system package fiche.
Water heating energy efficiency of combination boiler 1

‘I’ %
Stated load profile:
Solar contribution
From the board of the solar device
Auxiliary electricity
2
( 1.1 x ‘I’ - 10 % ) x ‘II’ - ‘III’ - ‘I’ = + %
3
Water heating energy efficiency of the assembly in
average climate conditions %
Water heating energy efficiency class of the assembly in average climate conditions
M < 27 % ≥ 27 % ≥ 30 % ≥ 33 % ≥ 36 % ≥ 39 % ≥ 65 % ≥ 100 % ≥ 130 % ≥ 163 %
L < 27 % ≥ 27 % ≥ 30 % ≥ 34 % ≥ 37 % ≥ 50 % ≥ 75 % ≥ 115 % ≥ 150 % ≥ 188 %
XL < 27 % ≥ 27 % ≥ 30 % ≥ 35 % ≥ 38 % ≥ 55 % ≥ 80 % ≥ 123 % ≥ 160 % ≥ 200 %
XXL < 28 % ≥ 28 % ≥ 32 % ≥ 36 % ≥ 40 % ≥ 60 % ≥ 85 % ≥ 131 % ≥ 170 % ≥ 213 %
Water heating energy efficiency class in colder and hotter climate conditions
3 2
Colder: - 0.2 x =
%
3 2
Hotter: + 0.4 x = %
56
64
Parameters for filling in the DHW package fiche.
Parameter Victrix Zeus 25

‘I’ 82
‘II’ *
‘III’ *

* to be determined according to Regulation 811/2013 and transient calculation
methods as per Notice of the European Community no. 207/2014.
57
Domestic hot water production system package fiche.
Water heating energy efficiency of combination boiler 1

_____ %
Stated load profile:
Solar contribution
From the board of the solar device
Auxiliary electricity
2
( 1.1 x _____ - 10 % ) x _____ - ____ - ______ = + %
3
Water heating energy efficiency of the assembly in
average climate conditions %
Water heating energy efficiency class of the assembly in average climate conditions
M < 27 % ≥ 27 % ≥ 30 % ≥ 33 % ≥ 36 % ≥ 39 % ≥ 65 % ≥ 100 % ≥ 130 % ≥ 163 %
L < 27 % ≥ 27 % ≥ 30 % ≥ 34 % ≥ 37 % ≥ 50 % ≥ 75 % ≥ 115 % ≥ 150 % ≥ 188 %
XL < 27 % ≥ 27 % ≥ 30 % ≥ 35 % ≥ 38 % ≥ 55 % ≥ 80 % ≥ 123 % ≥ 160 % ≥ 200 %
XXL < 28 % ≥ 28 % ≥ 32 % ≥ 36 % ≥ 40 % ≥ 60 % ≥ 85 % ≥ 131 % ≥ 170 % ≥ 213 %
Water heating energy efficiency class in colder and hotter climate conditions
3 2
Colder: - 0.2 x =
%
3 2
Hotter: + 0.4 x = %

58
65
66
67
Immergas S.p.A.
Fax 0522.680617
Tel. 0522.689011
immergas.com
42041 Brescello (RE) - Italy
Certified company ISO 9001

This instruction booklet is made of ecological paper Cod. 1.042022ENG - rev. ST.003654/001 - 02/19 - Inglese per IRLANDA (IE)

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Instructions and

EARTH TERMINAL CONNECTION

READ AND UNDERSTAND THE INSTRUCTIONS

RECOVERABLE OR RECYCLABLE MATERIAL

PERSONAL PROTECTIVE EQUIPMENT.

1.1 INSTALLATION RECOMMENDATIONS.

operators who install and service the

(technical and structural), such as to allow for (always in safe,

The wall surface must be smooth, without any protrusions or

N.B.: wall mounting of the boiler must guarantee

place, which use products that may develop

Filling the condensate drain trap.

Height Width Depth

liquids (if the mixtures are prepared perfectly).

Boiler antifreeze protection (both -5°C and -15°C) is thus en-

The kit includes:

mixture components may occur during the period of storage in

Position of the central heating user

Concentric pipe 80/125 Ø m 1 2.1 1

90° concentric bend Ø 80/125 3.0 1.4

Concentric bend 45° Ø 80/125 2.1 1

Terminal complete with concentric horizontal intake-exhaust

Terminal complete with concentric vertical intake-exhaust

90° concentric bend Ø 80/125 with inspection 3.4 1.6

Stub pipe with inspection Ø 80/125 3.4 1.6

Intake 0.87 m 0.1 Intake m 1.0 m 0.4

Intake terminal Ø 80 Intake 2.2 m 0.35 Intake m 2.5 m1

Intake 1.9 m 0.3 Intake m 2.2 m 0.9

Intake 1.2 m 0.2 Intake m 1.4 m 0.5

the appliance is installed (external);

the paragraph on indoor installation. In this configuration the up-

The cover kit includes:

The terminal kit includes:

special extensions must be requested.

The kit includes: The Kit Ø 80/125 includes:

The Kit includes:

The Kit Ø 80/125 includes: C53* - C83

The kit includes:

N° 1 - Female intake flange (3)

N° 2 - Bend 90° Ø 80 (5)

N° 2 - Internal wall sealing plates (7)

* to complete C53 configuration, also provide for a “green

Minimum slope 1.5%

The system must be combined with the following components (12).

A A by the manufacturer) is not sufficient, remove the residual lubricant

Ø 80 Rigid SHAFT SHAFT

Kit composition: Installation drawings key:

technical regulations. To guarantee reliability and operation over

the regulations in force.

1.21 FLUES, CHIMNEYS AND CHIMNEY CAPS.

System water litres

The parameters that influence the duration and prop-

Total head available to the system.

Circulator pump absorbed power (W)

Flow rate (l/h)

A+B = Head available with bypass closed

Key: 11 - Air / gas manifold 19 - Fan

the boiler goes to the state previous to switch-off.

demand for heat (central heating or domestic hot water produc-

Intake terminal Ø 80 Intake 2.2 m 0.35 Intake m 2.5 m1