Immergas Victrix Tera 28 1 Product manual

VICTRIX TERA
28 1 - 32 1 - 38 1
IE
Instructions and warnings
Installer
User
Maintenance technician
*1.040295ENG*

Dear Customer,................................................................................. 3
General warnings ............................................................................. 3
Safety symbols used.......................................................................... 4
Personal protective equipment....................................................... 4
1 Boiler installation................................................................. 5
1.1 Installation recommendations. .......................................... 5
1.2 Main dimensions. ................................................................ 8
1.3 Minimum installation distances........................................ 8
1.4 Antifreeze protection. ......................................................... 9
1.5 Installation inside the recessed frame (Optional). ........ 10
1.6 Boiler connection unit. ..................................................... 11
1.7 Gas connection. ................................................................. 11
1.8 Hydraulic connection........................................................ 12
1.9 Electrical connection......................................................... 13
1.10 Remote controls and room chrono-thermostats
(Optional). .......................................................................... 13
1.11 External temperature probe (Optional).......................... 14
1.12 Immergas ue systems. ..................................................... 15
1.13 Tables of resistance factors and equivalent lengths
“GREEN SERIES”............................................................... 16
1.14 Outdoor installation in partially protected area............ 18
1.15 Internal installation using a recessed frame with direct
air intake. ............................................................................ 20
1.16 Concentric horizontal kit installation............................. 20
1.17 Concentric vertical Kit installation. ................................ 21
1.18 Separator kit installation................................................... 23
1.19 Adaptor C9 kit installation............................................... 24
1.20 Ducting of ues or technical slots. .................................. 26
1.21 Conguration type B, open chamber and fan assisted for
indoors. ............................................................................... 26
1.22 Flue exhaust to ue/chimney............................................ 26
1.23 Flues, chimneys, chimney pots and terminals............... 27
1.24 Water treatment system lling......................................... 27
1.25 System lling. ..................................................................... 28
1.26 Filling the condensate drain trap..................................... 28
1.27 Gas system start-up. .......................................................... 28
1.28 Boiler start-up (Ignition).................................................. 28
1.29 Circulation pump............................................................... 28
1.30 Boiler components............................................................. 31
1.31 Kits available on request. .................................................. 31
2 Instructions for use and maintenance............................. 32
2.1 General warnings............................................................... 32
2.2 Cleaning and maintenance............................................... 34
2.3 Control panel...................................................................... 34
2.4 Using the boiler. ................................................................. 35
2.5 Fault and anomaly signals. ............................................... 36
2.6 Information Menu. ............................................................ 38
2.7 Boiler shutdown................................................................. 39
2.8 Restore central heating system pressure......................... 39
2.9 Draining the system. ......................................................... 39
2.10 Draining the domestic hot water circuit......................... 39
2.11 Antifreeze protection. ....................................................... 39
2.12 Cleaning the case. .............................................................. 39
2.13 Decommissioning.............................................................. 39
2.14 Gas system not used for periods over 12 months.......... 39
3 Instructions for maintenance and initial check............. 40
3.1 General warnings............................................................... 40
3.2 Initial check. ....................................................................... 40
3.3 Yearly appliance check and maintenance. ...................... 41
3.4 Boiler Hydraulic diagram................................................. 42
3.5 Wiring diagram.................................................................. 43
3.6 Possible problems and their causes. ................................ 44
3.7 Converting the boiler to other types of gas.................... 44
3.8 Calibration of fan speed.................................................... 45
3.9 Adjustment of the air-gas ratio. ....................................... 45
3.10 Checks following conversion to another type of gas..... 45
3.11 Programming the P.C.B. ................................................... 46
3.12 Password-protected special functions............................. 50
3.13 Screed heater function. ..................................................... 50
3.14 Automatic vent function (dl). .......................................... 50
3.15 Flue installation (Fu)......................................................... 50
3.16 Maintenance function (MA)............................................ 51
3.17 "Chimney sweep” function............................................... 51
3.18 Solar panels coupling function. ....................................... 51
3.19 Pump anti-block function. ............................................... 51
3.20 3-way anti-block system. .................................................. 51
3.21 Radiators antifreeze function........................................... 51
3.22 Casing removal................................................................... 52
4 Technical data..................................................................... 54
4.1 Variable heat output. ......................................................... 54
4.2 Combustion parameters. .................................................. 55
4.3 Technical data..................................................................... 56
4.4 Key for Data nameplate..................................................... 57
4.5 Technical parameters for combination boilers
(in compliance with Regulation 813/2013).................... 58
4.6 Product che
(in compliance with Regulation 811/2013).................... 60
4.7 Parameters for lling in the package che. .................... 62
CONTENTS

e manufacturer declines all liability due to printing or transcription errors, reserving the right to make any modications to its
technical and commercial documents without forewarning.
e company IMMERGAS S.p.A., with registered oce in via Cisa Ligure 95 42041 Brescello (RE), declares that the design, manu-
facturing and aer-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.
Dear Customer,
Congratulations for having chosen a top-quality Immergas product, able to assure well-being and safety for a long period of time. As an
Immergas Customer, you can also count on an Authorised Aer-Sales centre, prepared and updated to guarantee constant eciency of
your boiler. Read the following pages carefully: you will be able to draw useful tips on the proper use of the device, compliance with which
will conrm your satisfaction with the Immergas product.
For any assistance and scheduled maintenance please contact Authorised Aer-Sales centres: they have original spare parts and are
specically trained by the manufacturer.
GENERAL WARNINGS
is book contains important information for the:
Installer (section 1);
User (section 2);
Maintenance Technician (section 3).
• e user must carefully read the instructions in the specic section (section 2).
• e user must limit operations on the appliance only to those explicitly allowed in the specic section.
• e appliance must be installed by qualied and professionally trained personnel.
• e 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 legislation in force, the systems must be designed by qualied 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 qualied sta, intended as sta with specic technical skills in the system
sector, as envisioned by the Law.
• Improper installation or assembly of the Immergas appliance 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.
• is 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.
• e 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 sta that represents a guarantee of qualications and professionalism.
• e appliance 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 book (or however supplied by the manufacturer), the manufacturer is excluded from any contractual
and extra-contractual liability for any damage and the appliance warranty is invalidated.

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. e symbol indicates the appliance’s electrical components
or, in this manual, identies actions that can cause an electrical hazard.
MOVING PARTS
e symbol indicates the appliance’s moving components that can cause hazards.
HOT SURFACES
e symbol indicates the appliance’s very hot components that can cause burns.
SHARP SURFACES
e symbol indicates the appliance’s components or parts that can cause cuts if touched.
EARTH TERMINAL CONNECTION
e symbol identies 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.
SAFETY GLOVES
PERSONAL PROTECTIVE EQUIPMENT.
SAFETY GOGGLES
SAFETY FOOTWEAR
e user must not dispose of the appliance at the end of its service life as municipal waste, but send it to appro-
priate collection centres.

1
SI NO
INSTALLERUSER
MAINTENANCE TECHNICIAN
5
1BOILER INSTALLATION.
1.1 INSTALLATION RECOMMENDATIONS.
ATTENTION:
operators who install and service the
appliance must wear the personal
protective equipment required by ap-
plicable law.
e Victrix Tera boiler has been designed for wall
mounted installation only; for central heating and
production of domestic hot water for domestic use
and similar purposes.
e place of installation of the appliance and relative
Immergas accessories must have suitable features
(technical and structural), such as to allow for (always in safe,
ecient and comfortable conditions):
- installation (according to the provisions of technical legisla-
tion and technical regulations);
- maintenance operations (including scheduled, periodic,
routine and special maintenance);
- removal (outdoors in the place for loading and transporting
the appliances and components) as well as their eventual
replacement with appliances and/or equivalent components.
e wall surface must be smooth, without any protrusions or
recesses enabling access to the rear part. ey are not designed
to be installed on plinths or oors (Fig. 1).
By varying the type of installation the classication of the boiler
also varies, precisely:
- Type B23 or B53 boiler if installed using the relevant terminal
for air intake directly from the room in which the boiler has
been installed.
- Type C boiler if installed using concentric pipes or other types
of pipes envisioned for the sealed chamber boiler for intake
of air and expulsion of ue gas.
Only professionally qualied companies are authorised to
install Immergas gas appliances.
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:
It is not permitted to install boilers that
are removed and decommissioned from
other systems. e manufacturer declines all
liability for damage caused by boilers removed
from other systems or for any non-conformi-
ties of such equipment.
ATTENTION:
check the environmental operating
conditions of all parts relevant to in-
stallation, referring to the values shown in the
technical data table in this booklet.
ATTENTION:
Installation of the Victrix Tera boiler
when powered by LPG must comply
with the rules regarding gases with a greater
density than air (remember, as an example,
that it is prohibited to install plants powered
with the above-mentioned gas in rooms where
the oor is at a lower quota than the country
level).
ATTENTION:
if installing a kit or servicing the ap-
pliance, always empty the system’s
domestic hot water circuit rst so as not to
compromise the appliance’s electrical safety
(Par. 2.10).
YES NO

INSTALLERUSER
MAINTENANCE TECHNICIAN
6
Before installing the appliance, ensure it has been
delivered in perfect condition; if in doubt, contact
the supplier immediately. Packing materials (staples,
nails, plastic bags, polystyrene foam, etc.) constitute a
hazard and must be kept out of the reach of children.
If the appliance is installed inside or between cabinets, ensure
sucient space for normal servicing; therefore it is advisable to
leave clearance of at least 3 cm between the boiler casing and
the vertical sides of the cabinet. Leave adequate space above the
boiler for possible water and ue removal connections (Fig. 3).
It is just as important that the intake grids and exhaust
terminals are not obstructed.
It is recommended to check that no ue gas recircula-
tion is found in the air sample points (0.5% maximum
permitted CO2).
Keep all ammable objects away from the appliance (paper,
rags, plastic, polystyrene, etc.).
e minimum distance for exhaust pipes from ammable
materials must be at least 25 cm.
Do not place household appliances underneath the boiler as
they could be damaged if the safety valve intervenes, if the
drain trap is blocked, or if there are leaks from the hydraulic
connections; otherwise, the manufacturer cannot be held re-
sponsible for any damage caused to the household appliances.
For the aforementioned reasons, we recommend not placing
furnishings, furniture, etc. under the boiler.
In the event of malfunctions, faults or incorrect operation, turn
the appliance o immediately and contact an authorised com-
pany (e.g. the Authorised Technical Assistance centre, which
has specically trained sta and original spare parts). Do not
attempt to modify or repair the appliance alone.
Any modication to the appliance that is not explicitly indicated
in this section of the booklet is forbidden.
Installation Standards:
- this boiler can be installed out-
doors in a partially protected area.
A partially protected area is one in which
the boiler is not exposed to the direct ac-
tion of the weather (rain, snow, hail, etc.).
This type of installation is only possible
when permitted by the laws in force in the
appliance's country of destination.
- Installation of gas appliances, ue exhaust
pipes and combustion air intake pipes is
forbidden in places with a re risk (for ex-
ample: garages, closed parking stalls), and
in potentially dangerous places.
- Installation on the vertical projection
of cooking hobs is forbidden.
- Installation is forbidden in places/
rooms that constitute public areas of apart-
ment buildings, internal stairways or other
escape routes (e.g. oor landings, entrance
halls, etc.).
- Installation is also forbidden in places/
rooms that constitute public areas of apart-
ment buildings such as cellars, entrance
halls, attics, lofts, etc., unless otherwise
provided for by local regulations in force.
- ese boilers are not suitable for installation
on walls made of combustible material.
N.B.: installing the wall recessed frame kit must guar-
antee the boiler stable, ecient support. e recessed
frame kit ensures appropriate support only if installed
correctly (according to the rules of good practice),
following the instructions on its instructions leaet.
e recessed frame for the boiler is not a supporting
structure and must not replace the wall removed. It is necessary
to position the boiler inside the wall. For safety reasons against
any leaks it is necessary to plaster the boiler housing in the brick
wall.

INSTALLERUSER
MAINTENANCE TECHNICIAN
7
N.B.: wall mounting of the boiler must guarantee
stable and ecient support for the boiler. e
plugs (standard supply) are only to be used to x
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 of hollow bricks or
blocks, partitions with limited static properties, or in any case
walls other than those indicated, a static test must be carried
out on the mounting system.
ese boilers are used to heat water to below boiling
temperature in atmospheric pressure.
ey must be connected to a central heating system
and domestic hot water circuit suited to their perfor-
mance and capacity.
Risk of damage due to corrosion caused by unsuitable
combustion air and environment.
Spray, solvents, chlorine-based detergents, paints, glue,
ammonium compounds, powders and similar cause
product and ue duct corrosion.
- Check that combustion air power supply is free from
chlorine, sulphur, powders, etc.
- Make sure that no chemical substances are stored in the place
of installation.
- If you want to install the product in beauty salons, paint
workshops, carpenter’s shop, cleaning companies or
similar, choose a separate installation area that ensures
combustion air supply that is free from chemical substances.
- Make sure the combustion air is not fed from chimneys that
were used with gas boilers or other heating devices. In fact, these
may cause an accumulation of soot in the chimney.
Risk of material damage aer using sprays and liquids
to search for leaks
Leak sprays and liquids clog the reference hole (P1-Fig.
40) 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)
Filling the condensate drain trap.
On rst lighting of the boiler, ue gas may
come out from the condensate drain; af-
ter a few minutes’ operation, check that this no
longer occurs.
is means that the drain trap is lled with
condensate to the correct level preventing the
passage of ue gas.
ATTENTION:
-Type B open chamber boilers must not
be installed in places where commer-
cial, artisan or industrial activities take place,
which use products that may develop volatile
vapours or substances (e.g. acid vapours,
glues, paints, solvents, combustibles, etc.),
as well as dusts (e.g. dust deriving from the
working of wood, coal nes, cement, etc.),
which may be harmful for the components
of the appliance and jeopardise operation.
-Unless otherwise provided for by local reg-
ulations in force, congurations B23 and B53:
the boilers must not be installed in bedrooms,
bathrooms or bedsits. ey must neither be
installed in rooms containing solid fuel heat
generators nor in rooms communicating with
said rooms.
-e installation rooms must be permanently
ventilated, in compliance with the local reg-
ulations in force (at least 6 cm2for every kW
of installed heat input, except in the event of
any increases needed for electro-mechanical
vacuum cleaners or other devices that could
put the installation room under vacuum).
-Installation of appliances in B23 and B53
conguration is recommended in non-resi-
dential premises and which are permanently
ventilated.
ATTENTION:
Failure to comply with the above implies
personal responsibility and invalidates
the warranty.

2
3
INSTALLERUSER
MAINTENANCE TECHNICIAN
8
1.2 MAIN DIMENSIONS.
Key:
A - 450 mm
B - 350 mm
C - 30 mm
D - 30 mm
E - 350 mm
1.3 MINIMUM INSTALLATION DISTANCES.
Key:
V - Electrical connection
G - Gas supply
AC - Domestic hot water outlet
ACV - Solar valve kit DHW inlet (optional)
AF - Domestic hot water inlet
SC - Condensate drain (minimum internal diameter Ø 13 mm)
M - System ow
R - System return
Height
(mm)
Width
(mm)
Depth
(mm)
748 440 256
CONNECTIONS
GAS
WATER
DOMESTIC
CW
SYSTEM
GAC AF R M
3/4” 1/2” 1/2” 3/4” 3/4”

INSTALLERUSER
MAINTENANCE TECHNICIAN
9
1.4 ANTIFREEZE PROTECTION.
Minimum temperature –5 °C.
e boiler comes standard with an antifreeze function
that activates the pump and burner when the system
water temperature drops below 4°C.
In these conditions the boiler is protected against freez-
ing down to a temperature of -5°C.
Minimum temperature –15 °C.
If the boiler is installed in a place where the temperature drops
below -5°C, the appliance may freeze.
To prevent the risk of freezing follow the instructions below:
- protect the central heating circuit from freezing by inserting
a good-quality antifreeze liquid, which is specially suited for
central heating systems and which is manufacturer guaranteed
against damage to the heat exchanger or other components.
e antifreeze liquid must not be harmful to one's health. e
instructions of the manufacturer of the liquid must be strictly
followed regarding the necessary percentage with respect to
the minimum temperature provided for.
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).
- e central heating circuit of Immergas boilers are made from
materials that resist wear caused by ethylene and propylene
glycol based antifreeze liquids (if the mixtures are prepared
perfectly).
- For life and possible disposal, follow the manufacturer's in-
structions of liquid.
- Protect the domestic hot water circuit against freezing by
using an accessory that is supplied on request (anti-freeze
kit) comprising two electric heating elements, the relevant
cables and a control thermostat (carefully read and follow 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
ensured only if:
- the boiler is correctly connected to gas and electricity power
supply circuits;
- the boiler is powered constantly;
- the boiler is not in “o” mode;
- the boiler is not in anomaly conditions (Paragraph 2.5);
- the essential components of the boiler and/or antifreeze kit
are not faulty.
e warranty does not cover damage due to interruption of the
electrical power supply and failure to comply with that stated
on the previous page.
N.B.: if the boiler is installed in places where the
temperature drops below 0°C, the domestic hot
water and central heating attachment pipes must
be insulated.
Note: the antifreeze systems described in this chap-
ter are only to protect the boiler. e 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.

4
6
5
1
2
3
3
1
4
2
2
1
4
5
6
5
6
INSTALLERUSER
MAINTENANCE TECHNICIAN
10
1.5 INSTALLATION INSIDE THE RECESSED FRAME
OPTIONAL.
e boiler is designed for installation inside the Immergas re-
cessed frame (supplied as optional). e necessary parts for this
type of installation (brackets) must also be purchased separately
as optional kit.
To install proceed as follows:
- Install the bracket (2) inside the recessed frame xing it with the
screws (3) in the pre-drilled holes (Fig. 4).
- Hang the boiler (4) to the bracket (2) (Fig. 5).
- Block the boiler (4) by mounting the brackets (5) and xing them
with their screws (6) (Fig. 6).
e brackets (5) used to centre the boiler on the frame and hold
it in place stop against the frame (1) so do not require xing to
the frame itself.

1
2
3
G
V
AC
AF
R
SC
M
7
INSTALLERUSER
MAINTENANCE TECHNICIAN
11
1.6 BOILER CONNECTION UNIT.
e connection unit consisting of all the necessary parts to per-
form the hydraulic and gas system connections of the appliance
comes as optional kit, perform the connections respecting the
arrangement of Fig. 7 based on the type of installation to be made.
1.7 GAS CONNECTION.
Our boilers are designed to operate with methane gas (G20) and
L.P.G. Supply pipes must be the same as or larger than the 3/4”G
boiler tting.
ATTENTION:
Before connecting the gas line, carefully
clean inside all the fuel feed system pipes
to remove any residue that could impair boiler
eciency. Also make sure the gas corresponds
to that for which the boiler is prepared (see
boiler data nameplate). If dierent, the boiler
must be converted for operation with the other
type of gas (see converting appliance for other
gas types). It is also important to check the dy-
namic pressure of the mains (methane or LPG)
used to supply the boiler, which must comply
with EN 437 and its attachment, as insucient
levels may reduce generator output and cause
discomfort to the user.
Ensure correct gas cock connection.
Key:
V - Electrical connection
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic hot water inlet
SC - Condensate drain
(minimum internal diameter Ø 13 mm)
M - System ow
R - System return
1 - System lling valve
2 - System draining valve
3 - 3 bar safety valve drain tting signal
According to local regulations in force,
make sure that a gas cock is installed
upstream of each connection between
the appliance and the gas system. is cock,
if supplied by the appliance’s manufacturer,
can be directly connected to the appliance
(i.e. downstream from the pipes connecting
the system to the appliance), according to the
manufacturer’s instructions.
e Immergas connection unit, supplied as
an optional kit, also includes the gas cock,
whose installation instructions are provided
in the kit.
In any case, make sure the gas cock is connect-
ed properly.
e gas supply pipe must be suitably dimensioned according to
current regulations in order to guarantee correct gas ow rate to
the burner even in conditions of maximum generator output and
to guarantee appliance eciency (technical specications). e
coupling system must conform to standards in force (EN 1775).
ATTENTION:
the appliance is designed to operate with
fuel gas free from impurities; otherwise
it is advisable to t special lters upstream of
the appliance to restore the purity of the fuel.

INSTALLERUSER
MAINTENANCE TECHNICIAN
12
Storage tanks (in case of supply from LPG depot).
- New LPG storage tanks may contain residual inert gases (nitro-
gen) that degrade the mixture delivered to the appliance casing
functioning anomalies.
- Due to the composition of the LPG mixture, layering of the
mixture components may occur during the period of storage in
the tanks. is can cause a variation in the caloric value of the
mixture delivered to the appliance, with subsequent change in
its performance.
1.8 HYDRAULIC CONNECTION.
In order not to void the condensation module war-
ranty, before making the boiler connections, carefully
clean the heating system (pipes, radiators, etc.) with
special pickling or descaling products to remove
any deposits that could compromise correct boiler
operation.
A treatment of the heating and water system water is required,
in compliance with the technical standards in force, in order to
protect the system and the appliance from deposits (e.g. scale),
slurry or other hazardous deposits. In order not to void the heat
exchanger warranty, you are required to comply with what has
been prescribed in (Par. 1.24).
Hydraulic connections must be made in a rational way using the
couplings on the boiler template.
ATTENTION:
the manufacturer declines all liability
in the event of damage caused by the
installation of an automatic lling system.
In order to meet the system requirements established by EN 1717
in terms of pollution of drinking water, we recommend installing
the IMMERGAS anti-backow kit to be used upstream of the cold
water inlet connection of the boiler. We also recommend using a
category 1, 2 or 3 heat transfer uid (ex: water + glycol) in the boil-
er's primary circuit (CH circuit), as dened in standard EN 1717.
To preserve the duration of appliance eciency fea-
tures, in the presence of water whose features can
lead to the deposit of lime scale, installation of the
“polyphosphate dispenser” kit is recommended .
3 bar safety valve.
Safety valve (Part. 3 Fig. 7) discharge must always be conveyed
through a draining funnel. Consequently, in the event of valve
intervention, the discharged liquid will end up in the sewer system.
Condensate drain.
To drain the condensate produced by the appliance, it is necessary
to connect to the drainage system by means of acid condensate
resistant pipes, with an internal Ø of at least 13 mm. e system
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. Aer rst ignition, check that
the drain trap is lled with condensate (Para. 1.26). 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 legis-
lation in force.

9
b
2
3
d
a
1
c
2
8
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MAINTENANCE TECHNICIAN
13
1.9 ELECTRICAL CONNECTION.
e appliance has an IPX5D protection degree; electrical safety of
the appliance is achieved only when it is connected properly to an
ecient earthing system, as specied by current safety standards.
ATTENTION:
the manufacturer declines any respon-
sibility for damage or physical injury
caused by failure to connect the boiler
to an ecient earthing system or failure
to comply with the reference standards.
•Open the control panel connections compartment (Fig. 8).
To carry out electrical connections, all you have to do is open the
connections compartment as follows:
- Disassemble the cover (Fig. 54).
- Disassemble the cover (b) as follows:
1. Loosen the screw (a).
2. Press the two hooks on the connections compartment
cover.
3. Remove the cover (b) from the control panel (c).
- At this point, it is possible to access the terminal board (d).
Also ensure that the electrical installation corresponds to maxi-
mum absorbed power specications, as shown on the boiler data
nameplate. Boilers are supplied with a special “X” type power
cable without plug.
ATTENTION:
the power supply cable must be connect-
ed to a 230V ±10% / 50Hz mains supply
respecting L-N polarity and earth con-
nection ; this network must also have
a multi-pole circuit breaker with class III
overvoltage category in compliance with
installation regulations.
To protect from possible dispersions of DC voltage, it is necessary
to provide a type A dierential safety device.
If the power cable is damaged, contact a qualied company (e.g.
the Authorised Aer-Sales Technical Assistance Service) for its
replacement to avoid a hazard.
e power cable must be laid as shown (Fig. 7).
If the network fuse on the P.C.B. needs replacing, this must also
be done by qualied personnel: use a 3.15 A fast fuse.
For the main power supply to the appliance, never use adapters,
multiple sockets or extension leads.
Installation with system operating at direct low temperature.
e boiler can directly supply a low-temperature system by setting
the ow temperature adjustment range “t0” and “t1” (Par. 3.11).
In this situation it is good practice to insert a relevant safety kit
(optional) made up from a thermostat (with adjustable tempera-
ture). e thermostat must be positioned on the system ow pipe
at a distance of at least 2 metres from the boiler.
1.10 REMOTE CONTROLS AND ROOM CHRONO
THERMOSTATS OPTIONAL.
e boiler is prepared for the application of room chrono-ther-
mostats or remote controls, which are available as optional kits
(Fig. 9).
All Immergas chrono-thermostats are connected with 2 wires
only. Carefully read the user and assembly instructions contained
in the accessory kit.
ATTENTION:
disconnect power to the appliance be-
fore any electrical connection.

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EXTERNAL PROBE
Correction law of the ow temperature depending on the external temperature and
user adjustment of the central heating temperature.
• On/O Immergas digital chrono-thermostat.
e chrono-thermostat allows:
- set two room temperature values: one for day (comfort tem-
perature) and one for night (reduced temperature);
- set a weekly programme with four daily switch on and switch
o times;
- select the required operating mode from the various possible
alternatives:
• manual mode (with adjustable temperature);
• automatic mode (with set programme);
• forced automatic mode (momentarily changing the temperature
of the automatic programme).
e chrono-thermostat is powered by two 1.5V LR 6 type alkaline
batteries;
•Comando Amico Remoto Remote Control Device V2 (CARV2)
with climate chrono-thermostat function.
In addition to the functions described in the previous point,
the CARV2 panel enables the user to control all the important
information regarding operation of the appliance and the heating
system with the opportunity to easily intervene on the previously
set parameters, without having to go to where the appliance is
installed. e panel is provided with self-diagnosis to display
any boiler functioning anomalies. e climate chrono-thermo-
stat incorporated into the remote panel enables the system ow
temperature to be adjusted to the actual needs of the room being
heated, in order to obtain the desired room temperature with
extreme precision and therefore with evident saving in running
costs. e CARV2 is fed directly by the boiler by means of the
same 2 wires used for the transmission of data between the boiler
and device.
Comando Amico Remoto Remote Control V2 or On/Off
chrono-thermostat electrical connections (Optional). e op-
erations described below must be performed aer having removed
the voltage from the appliance. Any thermostat or On/O environ-
ment chrono-thermostat must be connected to clamps 44/40 and
41 eliminating jumper X40 (Fig. 39). Make sure that the On/O
thermostat contact is “dry”, i.e. independent of the mains voltage,
otherwise the P.C.B. would be damaged. Any Comando Amico
Remoto remote control V2 must be connected to terminals 44/40
and 41, eliminating jumper X40 on the P.C.B. ( Fig. 39). e boiler
can only be connected to one remote control.
If the Comando Amico Remoto remote control V2 or
any other On/O chrono-thermostat is used arrange
two separate lines in compliance with current regu-
lations regarding electrical systems. No boiler pipes
must ever be used to earth the electric system or telephone
lines. Ensure elimination of this risk before making the boiler
electrical connections.
1.11 EXTERNAL TEMPERATURE PROBE OPTIONAL.
e boiler is designed for the application of the external tempera-
ture probe (Fig. 10), which is available as an optional kit. Refer to
the relative instruction sheet for positioning of the external probe.
The probe can be connected directly to the boiler electrical
system and allows the max. system ow temperature to be au-
tomatically decreased when the external temperature increases,
in order to adjust the heat supplied to the system according to
the change in external temperature. e external probe always
operates when connected, regardless of the presence or type of
room chrono-thermostat used and can work in combination with
Immergas chrono-thermostats. e correlation between system
ow temperature and external temperature is determined by the
position of the central heating selector switch on the boiler control
panel (or on the CARV2 control panel if connected to the boiler)
according to the curves shown in the diagram (Fig. 11). e elec-
tric connection of the external probe must be made on clamps 38
and 39 on the terminal board in the boiler control panel (Fig. 39).
Position of the central heating
temperature user adjustment

12
(A)
(B)
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1.12 IMMERGAS FLUE SYSTEMS.
Immergas supplies various solutions separately from the boilers
regarding the installation of air intake terminals and ue exhaust,
which are fundamental for boiler operation.
ATTENTION:
the boiler must be installed exclusive-
ly with an original Immergas “Green
Range” inspectionable air intake system and
ue gas extraction system made of plastic,
with the exception of the C6 conguration, as
required by the regulations in force and by the
product’s approval.
is ue can be identied by an identication
mark and special distinctive marking bearing
the note "only for condensation boilers".
e plastic pipes cannot be installed outdoors,
for tracts longer than 40 cm, without suitable
protection from UV rays and other atmos-
pheric agents.
• Resistance factors and equivalent lengths.
Each ue component has a Resistance Factor based on exper-
imental tests and specied in the table below. e Resistance
Factor for individual components is independent from the type
of boiler on which it is installed and has a dimensionless size. It
is however, conditioned by the temperature of the uids that pass
through the pipe and therefore, varies according to applications
for air intake or ue exhaust. Each single component has a resist-
ance corresponding to a certain length in metres of pipe of the
same diameter; the so-called equivalent length, can be obtained
from the ratio between the relative Resistance Factors.
All boilers have an experimentally obtainable maximum Re-
sistance Factor equal to 100.
e maximum Resistance Factor allowed corresponds to the
resistance encountered with the maximum allowed pipe length
for each type of Terminal Kit. is information allows calcula-
tions to be made to verify the possibility of setting up various
ue congurations.
Note: to dimension the ue ducting using commercial compo-
nents, refer to the table of combustion parameters (Paragraph 4.2).
• Positioning the gaskets (black) for “green range” ue systems.
Position the gasket correctly (for bends and extensions) (Fig. 12):
- gasket (A) with notches, to use for bends;
- gasket (B) without notches, to use for extensions.
N.B.: if necessary, to ease the push-tting, spread the elements
with commonly-used talc.
• Coupling extension pipes and concentric elbows.
To install snap-t extensions with other elements of the ue
extraction elements assembly, follows: Fit the concentric 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 eciency of the coupling.
N.B.:if the exhaust terminal and/or extension concentric pipe
needs shortening, consider that the internal duct must always
protrude by 5 mm with respect to the external duct.
N.B.: for safety purposes, do not obstruct the boiler intake/
exhaust terminal, even temporarily.
e various parts of the ue system must be checked
to ensure that they have been laid in such a way as
to prevent the coupled parts from detaching, in par-
ticular, the ue exhaust duct in the Ø80 separator kit
conguration. Should the aforesaid condition not be
adequately guaranteed, it will be necessary to use the
special clamp ring nut clip kit.
N.B.: when installing horizontal pipes, a minimum inclination of
3% towards the boiler must be maintained, and a section clamp
with plug must be installed every 3 metres.
• Installation inside the recessed frame. In this mode, install the
ue according to your needs using the appropriate pre-sections
in the frame to exit from its clearances.

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1.13 TABLES OF RESISTANCE FACTORS AND EQUIVALENT LENGTHS “GREEN SERIES”.
TYPE OF DUCT
Resistance
Resistance
(R)
Length
in m of concentric pipe
Ø 80/125
Concentric pipe 80/125 Ø m 1 2.1 1
Ø 80/125 90° concentric bend 3.0 1.4
Ø 80/125 45° concentric bend 2.1 1
Terminal complete with concentric horizontal intake-exhaust
Ø 80/125 2.8 1.3
Terminal complete with concentric vertical intake-exhaust
Ø 80/125 3.6 1.7
90° concentric bend Ø 80/125 with inspection 3.4 1.6
Stub pipe with inspection Ø 80/125 3.4 1.6

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MAINTENANCE TECHNICIAN
17
TYPE OF DUCT
Resistance
Factor
(R)
Length
in metres of
concentric pipe Ø
60/100
Length
in metres
of a Ø 80 pipe
Length
in metres
of a Ø 60 pipe
Length
in metres of
concentric pipe
Ø 80/125
Concentric pipe
Ø 60/100 m 1
Intake and
Exhaust 6.4 m 1 Intake m 7.3 Exhaust m 1.9 m 3.0
Exhaust m 5.3
Ø 60/100 90° concentric
bend
Intake and
Exhaust 8.2 m 1.3 Intake m 9.4 Exhaust m 2.5 m 3.9
Exhaust m 6.8
Ø 60/100 45° concentric
bend
Intake and
Exhaust 6.4 m 1 Intake m 7.3 Exhaust m 1.9 m 3.0
Exhaust m 5.3
Terminal complete with con-
centric horizontal intake-ex-
haust Ø 60/100
Intake and
Exhaust 15 m 2.3
Intake m 17.2
Exhaust m 4.5 m 7.1
Exhaust m 12.5
Intake terminal -
horizontal concentric exhaust
Ø 60/100
Intake and
Exhaust 10 m 1.5
Intake m 11.5
Exhaust m 3.0 4.7 m
Exhaust m 8.3
Complete intake terminal -
vertical concentric exhaust
Ø 60/100
Intake and
Exhaust 16.3 m 2.5
Intake m 18.7
Exhaust m 4.9 m 7.7
Exhaust m 13.6
Concentric vertical
intake-exhaust terminal
Ø 60/100
Intake and
Exhaust 9 1.4 m
Intake m 10.3
Exhaust m 2.7 m 4.3
Exhaust m 7.5
Pipe Ø 80 m 1 Intake 0.87 m 0.1 Intake m 1.0 Exhaust m 0.4
m 0.4
m 0.5
Exhaust 1.2 m 0.2 Exhaust m 1.0
Complete terminal
intake Ø 80 m 1 Intake 3 m 0.5 Intake m 3.4 Exhaust m 0.9 1.4 m
Intake terminal Ø 80
Exhaust terminal Ø 80
Intake 2.2 m 0.35 Intake m 2.5 Exhaust m 0.6
m 1
m 0.9
Exhaust 1.9 m 0.3 Exhaust m 1.6
Ø 80 90° bend Intake 1.9 m 0.3 Intake m 2.2 Exhaust m 0.8
m 0.9
m 1.2
Exhaust 2.6 m 0.4 Exhaust m 2.1
Ø 80 45° bend Intake 1.2 m 0.2 Intake m 1.4 Exhaust m 0.5
m 0.5
0.7
Exhaust 1.6 m 0.25 Exhaust m 1.3
Pipe Ø 60 m 1
for ducting Exhaust 3.3 m 0.5 Intake m 3.8 Exhaust m 1.0 m 1.5
Exhaust m 2.7
Ø 60 90° bend
for ducting Exhaust 3.5 m 0.55
Intake m 4.0
Exhaust m 1.1 m 1.6
Exhaust m 2.9
Reduction Ø 80/60 Intake and
Exhaust 2.6 m 0.4 Intake m 3.0 Exhaust m 0.8 m 1.2
Exhaust m 2.1
Terminal complete with ver-
tical exhaust Ø60 for ducting Exhaust 12.2 m 1.9
Intake m 14
Exhaust m 3.7 m 5.8
Exhaust m 10.1

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MAINTENANCE TECHNICIAN
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1.14 OUTDOOR INSTALLATION IN PARTIALLY
PROTECTED AREA.
A partially protected area is one in which the appliance
is not exposed to the direct action of the weather (rain,
snow, hail, etc.).
is type of installation is only possible
when permitted by the laws in force in
the appliance's country of destination.
If the appliance is installed in a place where the
ambient temperature drops below -5 °C, use the op-
tional antifreeze kit, checking the ambient operating
temperature range shown in the technical data table
in this instruction booklet.
Configuration type B, open chamber and fan assisted
(B23 or B53).
Using the special cover kit one can achieve direct air intake (Fig.
13) and ue exhaust in a single chimney or directly outside. In this
conguration it is possible to install the boiler in a partially pro-
tected place. In this conguration the boiler is classied as type B.
With this conguration:
- air intake takes place directly from the environment in which
the appliance is installed (external);
- the ue 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).
e technical regulations in force must be respected.
Cover kit assembly (Fig. 14).
Remove the two plugs from the lateral intake holes. Now cover
the le intake hole using the relevant plate, xing it onto the right
side using the 2 previously-removed screws. Install the Ø 80 outlet
ange on the central hole of the boiler, taking care to insert the
gasket supplied with the kit and tighten by means of the screws
provided. Install the upper cover, xing it using the 4 screws
present in the kit, positioning the relevant gaskets.
ATTENTION:
the diaphragm in the Victrix Tera 28
model in the kit, must necessarily be
inserted in the Ø 80 ange, ensuring it stops.
Engage the 90° Ø 80 bend with the male end (smooth) in the
female end (with lip seal) of the Ø 80 ange unit to the end stop.
Introduce the gasket, making it run along the bend. Fix it using
the metal sheet plate and tighten by means of the clips present in
the kit, making sure to block the 4 gasket aps. Fit the male end
(smooth) of the exhaust pipe into the female end of the 90° Ø 80
bend, making sure that the relevant wall sealing plate is already
tted; this will ensure hold and joining of the elements making
up the kit.
Max. length of exhaust pipe.
e exhaust pipe (both vertical or horizontal) can be extended to
a max. length of 30 linear metres.
Coupling of extension pipes.
To install push-tting extensions with other elements of the
ue, proceed as follows: Fit the pipe or elbow with the male side
(smooth) in the female side (with lip seal) to the end stop on the
previously installed element. is will ensure sealing eciency
of the coupling.
Conguration without cover kit in a partially protected location
(type C boiler).
By leaving the side plugs tted 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 conguration the
top cover kit guarantees additional protection for the boiler. It is
recommended but not compulsory. e Ø 80/80 separating device
cannot be used in this conguration (coupled with the cover kit).

13
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e cover kit includes:
N° 1 ermoformed cover
N°1 Gasket clamping plate
N°1 Gasket
N°1 Gasket tightening clip
N°1 Intake hole covering plate
N°1 Diaphragm (for Victrix Tera 28 only)
e terminal kit includes:
N° 1 Gasket
N° 1 Exhaust ange Ø 80
N° 1 Ø 80 90° bend
N° 1 Exhaust pipe Ø 80
N° 1 Wall sealing plate

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1.15 INTERNAL INSTALLATION USING A RECESSED
FRAME WITH DIRECT AIR INTAKE.
•Conguration type B, open chamber and fan assisted.
Using a kit separator, one can achieve direct air intake (Fig. 17)
and ue exhaust in a single chimney or directly outside. In this
conguration the boiler is classied as type B23.
With this conguration:
- air intake takes place directly from the environment in which
the appliance is installed (the recessed frame is ventilated), and
only functions in permanently ventilated rooms;
- the ue exhaust must be connected to its own individual chimney
or channelled directly into the external atmosphere.
e technical regulations in force must be respected.
Separator kit installation (Fig. 16)
Install the discharge ange on the central hole of the boiler, posi-
tioning the relative gasket with the circular projections downwards
in contact with the boiler ange, and tighten using the hex screws
with at tip contained in the kit. Remove the at ange present
in the lateral hole with respect to the central one (according to
needs) and replace it with the intake ange, positioning its gas-
ket already present in the boiler and tighten using the supplied
self-threading screws. Fit the male side (smooth) to the bends in
the female side of the anges.
e intake bend must face the rear side of the boiler.
Fit the exhaust pipe with the male side (smooth) to the female
side of the bend up to the end stop, making sure that the internal
wall sealing plate has been tted and connecting the required ue
according to personal requirements.
Max. length of exhaust pipe.
e exhaust pipe (both vertical or horizontal) can be extended to
a max. length of 30 linear metres.
1.16 CONCENTRIC HORIZONTAL KIT INSTALLATION.
•Type C conguration, sealed chamber and fan assisted.
e position of the terminal (in terms of distances from openings,
overlooking buildings, oor, etc.) must be in compliance with the
regulations in force.
is terminal is connected directly to the outside of the building
for air intake and ue exhaust. e horizontal kit can be installed
with the rear, right side, le side or front outlet. For installation
with frontal outlet, one must use the xing plate and a concentric
bend coupling in order to ensure sucient space to carry out the
tests required by law upon commissioning.
•External grid.
Both the Ø 60/100 and Ø 80/125 intake/exhaust terminal, if prop-
erly installed, is pleasant to look at on the outside of the building.
Make sure that the external silicone wall sealing plate is properly
inserted in the wall.
ATTENTION:
for correct functioning of the system
the terminal with grid must be in-
stalled correctly ensuring that, the "high"
indication present on the terminal is respect-
ed on installation.