Immergas Victrix Tera 28 1 User manual

VICTRIX TERA
28 1 - 32 1
Instantaneously wall-hung boilers
condensation module
sealed chamber (type C)
and fan assisted
or
open chamber (type B)
and fan assisted
IE
Instruction booklet and
warning
Installer
User
Maintenance Technician
*1.040295ENG*

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.
Dear Customer,
Our compliments 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 a qualied aer-sales service, prepared and updated to guarantee constant eciency of your boiler. Read the following pages carefully:
you will be able to draw useful suggestions regarding the correct use of the appliance. By respecting these suggestions, you will no doubt be satised with your
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 recommendations
All Immergas products are protected with suitable transport packaging.
e material must be stored in a dry place and protected from weathering.
e instruction book is an integral and essential part of the product and must also 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.
is instructions manual provides technical information for installing Immergas boilers. As for the other issues related to boiler installation (e.g. safety in the work
site, environment protection, injury prevention), it is necessary to comply with the provisions specied in the regulations in force and principles of good practice.
In compliance with the 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 appliance and/or Immergas components, accessories, kit and devices can cause unexpected problems to people, animals
and objects. Read the instructions provided with the product carefully to ensure proper installation.
Maintenance must be carried out by authorised technical personnel. e Authorised Aer-sales Service 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 damages and
the appliance warranty is invalidated.
e company IMMERGAS S.p.A., with registered oce in via Cisa Ligure 95 42041 Brescello (RE), declares that the design, manufacturing and aer-sales
assistance processes comply with the requirements of standard UNI EN ISO 9001:2008.
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.

INDEX
USER................................................... pageINSTALLER............................................. page MAINTENANCE TECHNICIAN........ page
1 Boiler installation. ......................................5
1.1 Installation recommendations..................5
1.2 Main dimensions. .......................................6
1.3 Antifreeze protection. ................................6
1.4 Installation inside a recessed frame
(Optional)....................................................7
1.5 Boiler connection unit. ..............................8
1.6 Gas connection. ..........................................8
1.7 Hydraulic connection.................................8
1.8 Electrical connection:.................................9
1.9 Remote controls and room chrono-
thermostats (Optional). .............................9
1.10External temperature probe (Optional).10
1.11Immergas ue systems.............................11
1.12Tables of resistance factors and
equivalent lengths.....................................11
1.13Outdoor installation in partially
protected area............................................13
1.14Internal installation using a recessed
frame with direct air intake.....................14
1.15Concentric horizontal kit installation....15
1.16Concentric vertical Kit installation........16
1.17Separator kit installation..........................17
1.18Adaptor C9 kit installation. ....................18
1.19Ducting of ues or technical slots. .........19
1.20Conguration type B, open chamber
and fan assisted for indoors.....................19
1.21Flue exhaust to ue/chimney. .................19
1.22Flues, chimneys and chimney caps. .......20
1.23Water treatment system lling................20
1.24System lling. ............................................20
1.25Filling the condensate drain trap............20
1.26Gas system start-up. .................................21
1.27Boiler start-up (Ignition).........................21
1.28Circulation pump......................................21
1.29Boiler components....................................23
1.30Kits available on request. .........................23
2 Use and maintenance instructions.........24
2.1 Cleaning and maintenance......................24
2.2 General warnings......................................24
2.3 Control panel.............................................24
2.4 Using the boiler.........................................25
2.5 Fault and anomaly signals. ......................26
2.6 Information Menu....................................28
2.7 Boiler shutdown........................................28
2.8 Restore central heating system pressure 28
2.9 Draining the system. ................................28
2.10Antifreeze protection. ..............................28
2.11Case cleaning.............................................28
2.12Decommissioning.....................................28
3 Boiler start-up (Initial check)..................29
3.1 Boiler Hydraulic diagram........................29
3.2 Wiring diagram.........................................30
3.3 Troubleshooting........................................31
3.4 Converting the boiler to other types of
gas. ..............................................................31
3.5 Calibration of number of fan revs. .........31
3.6 Adjustment of the air-gas ratio. ..............31
3.7 Checks following conversion to
another type of gas....................................32
3.8 Programming the P.C.B. ..........................33
3.9 Password-protected special functions....37
3.10Screed heater function.............................37
3.11Automatic vent function (dI)..................37
3.12Flue installation (Fu)................................37
3.13Maintenance function (MA)...................37
3.14"Chimney sweep function"......................38
3.15Solar panels coupling function. ..............38
3.16Pump anti-block function. ......................38
3.17ree-way anti-block system ..................38
3.18Radiators antifreeze function..................38
3.19Yearly appliance check and
maintenance. .............................................38
3.20Casing removal. ........................................39
3.21Variable heat output. ................................41
3.22Combustion parameters. .........................42
3.23Technical data. ..........................................43
3.24Variable heat output. ................................44
3.25Combustion parameters. .........................45
3.26Technical data. ..........................................46
3.27Key for Data nameplate. ..........................47
3.28Technical parameters for combination
boilers (in compliance with Regulation
813/2013)...................................................48
3.29Product che (in compliance with
Regulation 811/2013)...............................49
3.30Parameters for lling the package che. 50

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INSTALLERUSERMAINTENANCE TECHNICIAN
1BOILER INSTALLATION.
1.1 INSTALLATION
RECOMMENDATIONS.
e Victrix Tera boiler has been designed for
wall mounted installation only;for central heat-
ing 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 al-
low for (always in safe, ecient and comfortable
conditions):
- installation (according to the provisions of
technical legislation and technical regulations);
- maintenance operations (including scheduled,
periodic, routine, special);
- removal (to outdoors in the place for loading
and transporting the appliances and com-
ponents) as well as the eventual replacement
of those 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ca-
tion 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 enabled companies are
authorised to install Immergas gas appliances.
Installation must be carried out according to
regulation standards, current legislation and in
compliance with local technical regulations and
the required technical procedures.
Important: the manufacturer declines all liability
for damages caused by boilers removed from
other systems or for any non-conformities of
such equipment.
Before installing the appliance, ensure that it is
delivered in perfect condition;if in doubt, contact
the supplier immediately. Packing materials (sta-
ples, nails, plastic bags, polystyrene foam, etc.)
constitute a hazard and must be kept out of the
reach of children. If the appliance is installed in-
side 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. Keep all amma-
ble objects away from the appliance (paper, rags,
plastic, polystyrene, etc.).
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 connec-
tions;otherwise, the manufacturer cannot be
held responsible 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 company (e.g. the Tech-
nical Assistance centre, which has specically
trained sta and original spare parts). Do not
attempt to modify or repair the appliance alone.
Failure to comply with the above implies personal
responsibility and invalidates the warranty.
•Installation Standards:
- this boiler can be installed outdoors in a
partially protected area. A partially protected
area is one in which the boiler 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.
- 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 is prohibited on the vertical
projection of the cooking surface.
- Installation is forbidden in places/rooms
that constitute public areas of apartment
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 apartment
buildings such as cellars, entrance halls, attics,
los, etc., unless otherwise provided for by
local regulations in force.
Attention: installing the wall recessed frame
kit must guarantee the boiler stable, ecient
support. e recessed frame kit ensures ap-
propriate 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.
Attention: wall mounting of the boiler must
guarantee stable and ecient support for the
generator.
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 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 mount.
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 performance and capacity.
YES NO

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INSTALLERUSERMAINTENANCE TECHNICIAN
1.2 MAIN DIMENSIONS.
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 DOMESTIC
HOT WATER SYSTEM
GAC AF R M
3/4” 1/2” 1/2” 3/4” 3/4”
1.3 ANTIFREEZE PROTECTION.
Minimum temperature -5°C. e boiler comes
standard with an antifreeze function that ac-
tivates the pump and burner when the system
water temperature in the boiler falls below 4°C.
In these conditions the boiler is protected against
freezing to an ambient 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 can freeze.
To prevent the risk of freezing follow the instruc-
tions below:
- protect the central heating circuit from freezing
by inserting a good-quality antifreeze liquid
into this circuit, which is specially suited for
central heating systems and which is manu-
facturer guaranteed not to cause damage to
the heat exchanger or other components of
the boiler. e antifreeze liquid must not be
harmful to one's health. e instructions of the
manufacturer of this liquid must be followed
scrupulously regarding the percentage neces-
sary with respect to the minimum temperature
at which the system must be kept.
Attention: the excessive use of glycol could
jeopardise the proper functioning of the ap-
pliance.
An aqueous solution must be made with poten-
tial pollution class of water 2 (EN 1717:2002 or
local standards in force).
e materials used for the central heating circuit
of Immergas boilers withstand ethylene and
propylene glycol based antifreeze liquids (if the
mixtures are prepared perfectly).
For life and possible disposal, follow the sup-
plier's instructions.
- Protect the domestic hot water circuit against
freezing by using an accessory that is supplied
on request (antifreeze kit) comprising two
electric heating elements, the relevant wiring
and a control thermostat (carefully read the
installation instructions contained in the ac-
cessory 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 elec-
tricity power supply circuits;
- the boiler is powered constantly;
- the boiler is not in “o” mode.
- the boiler is not in anomaly conditions (Parag.
2.5);
- the essential components of the boiler and/or
antifreeze kit are not faulty.
e warranty does not cover damage due to inter-
ruption of the electrical power supply and failure
to comply with that stated on the previous page.
N.B.: if the boiler is installed in places where
the temperature falls below 0°C the domestic
hot water and central heating attachment pipes
must be insulated.

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3
3
1
4
2
2
1
4
5
6
5
6
5
4
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INSTALLERUSERMAINTENANCE TECHNICIAN
1.4 INSTALLATION INSIDE A
RECESSED FRAME OPTIONAL.
e boiler is designed for installation inside the
Immergas recessed 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. 3).
- Hang the boiler (4) to the bracket (2) (Fig. 4).
- Block the boiler (4) by mounting the brackets
(5) and xing them with their screws (6) (Fig.
5).
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.

8
1
2
3
G
V
AC
AF
R
SC
M
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INSTALLERUSERMAINTENANCE TECHNICIAN
Key:
V - Electrical connection
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic hot water inlet
SC - Condensate drain (minimum internal diame-
ter 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
1.5 BOILER CONNECTION UNIT.
e connection unit consisting of all the nec-
essary parts to perform the hydraulic and gas
system connections of the appliance comes as
optional kit, perform the connections respecting
the arrangement of Fig. 6 based on the type of
installation to be made.
1.6 GAS CONNECTION.
Our boilers are designed to operate with methane
gas (G20) and LPG. Supply pipes must be the
same as or larger than the 3/4”G boiler tting.
Before connecting the gas line, carefully clean
inside all the fuel feed system pipes to remove
any residue that could impair boiler eciency.
Also make sure the gas corresponds to that for
which the boiler is prepared (see boiler data
nameplate). If dierent, the boiler must be con-
verted for operation with the other type of gas
(see converting appliance for other gas types). It
is also important to check the dynamic 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 gen-
erator output and cause discomfort to the user.
Ensure correct gas cock connection. 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 spec-
ications). e coupling system must conform to
standards in force.
Fuel gas quality. e appliance was designed to
operate with combustible gas free of impurities;
otherwise it is advisable to fit special filters
upstream of the appliance to restore the purity
of the fuel.
Storage tanks (in case of supply from LPG
depot).
- New LPG storage tanks may contain residual
inert gases (nitrogen) that degrade the mixture
delivered to the appliance casing functioning
anomalies.
- Due to the composition of the LPG mixture,
layering of the mixture components may occur
during the period of storage in the tanks. is
can cause a variation in the heating power of
the mixture delivered to the appliance, with
subsequent change in its performance.
1.7 HYDRAULIC CONNECTION.
Attention: in order not to void the condensa-
tion module warranty, before making the boiler
connections, carefully wash 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 tech-
nical 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 Paragraph 1.23.
Water 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 es-
tablished by EN 1717 in terms of pollution of
drinking water, we recommend installing the
IMMERGAS anti-backow kit to be used up-
stream 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
boiler's primary circuit (C.H. circuit), as dened
in standard EN 1717.
Attention: to preserve the duration and the e-
ciency features of the appliance, in the presence
of water whose features can lead to the deposit of
scale, installation of the “polyphosphate dispenser”
kit is recommended.
3 bar safety valve. Discharge of the safety valve
has been conveyed to the condensate drain trap
outlet. Consequently, in the event of valve in-
tervention, the discharged liquid will end up in
the sewer system through the drain pipe of the
condensate drain trap.
In any case the lower part of the appliance is
tted with a drain tting (Ref. 3 Fig. 6) with the
relative closure cap to check for the presence of
liquid in the discharge circuit and to check the
intervention of the 3 bar safety valve.
Condensate drain. To drain the condensate pro-
duced by the appliance, it is necessary to connect
to the drainage system by means of acid conden-
sate resistant pipes, with an internal Øof 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 condensate can be correctly re-
moved. Aer rst ignition, check that the drain
trap is lled with condensate (Para. 1.25). 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 com-
pliance with the parameters established by the
legislation in force.

9
b
2
3
d
a
1
c
2
8
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INSTALLERUSERMAINTENANCE TECHNICIAN
1.8 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
responsibility for damage or physical injury
caused by failure to connect the boiler to an
ecient earth system or failure to comply with
the reference standards.
•Open the control panel connections compart-
ment (Fig. 7).
To carry out electrical connections, all you have
to do is open the connections compartment as
follows (Fig. 7):
- Disassemble the cover (Fig. 53).
- Disassemble the cover (b)
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 cor-
responds to maximum absorbed power speci-
cations as shown on the boiler data nameplate.
Boilers are supplied complete with an “X” type
power cable without plug. e power supply
cable must be connected to a 230V ±10%/
50Hz mains supply respecting L-N polarity and
earth connection;this network must also
have a multi-pole circuit breaker with class III
overvoltage category.
To protect from possible dispersions of DC volt-
age, it is necessary to provide a type A dierential
safety device.
When replacing the power supply cable, con-
tact a qualied company (e.g. the Authorised
Aer-Sales Technical Assistance Service). e
power cable must be laid as shown (Fig. 6).
In the event of mains fuse replacement on the
P.C.B., use a 3.15A quick-blow 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.
3.8). In this situation it is good practice to insert
a relevant safety kit (optional) made up from a
thermostat (with adjustable temperature). e
thermostat must be positioned on the system
ow pipe at a distance of at least 2 metres from
the boiler.
1.9 REMOTE CONTROLS AND
ROOM CHRONOTHERMOSTATS
OPTIONAL.
e boiler is prepared for the application of room
chrono-thermostats or remote controls, which
are available as optional kits (Fig. 8).
All Immergas chrono-thermostats are connected
with 2 wires only. Carefully read the user and
assembly instructions contained in the acces-
sory kit.
•On/O Immergas digital chrono-thermostat.
e chrono-thermostat allows:
- set two room temperature value: one for day
(comfort temperature) and one for night
(reduced temperature);
- set a weekly programme with four daily
switch on and switch o times;
- selecting the required function mode from
the various possible alternatives:
•manual operation (with adjustable tempera-
ture).
•automatic operation (with set programme).
•forced automatic operation (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 De-
vice 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 informa-
tion regarding operation of the appliance and
the heating system with the opportunity to
easily intervene on the previously set parame-
ters, without having to go to where the appli-
ance is installed. e panel is provided with
self-diagnosis to display any boiler functioning
anomalies. The climate chrono-thermostat
incorporated into the remote panel enables
the system ow temperature to be adjusted to
the actual needs of the room being heated, in
order to obtain the desired room temperature
with extreme precision and therefore with
evident saving in running costs. e 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/Ochrono-thermostat electrical con-
nections (Optional). e operations described
below must be performed aer having removed
the voltage from the appliance. Any thermostat
or On/O environment chrono-thermostat must
be connected to clamps 44/40 and 41 eliminating
jumper X40 (Fig. 38). Make sure that the On/
O thermostat contact is of the “clean” type, 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 clamps 44/40 and 41 eliminating jumper X40
on the P.C:B., paying attention not to invert the
polarity in the connections (Fig. 38). e boiler
can only be connected to one remote control.
Important: if the Comando Amico Remo-
to Remote Control V2 or any other On/Off
chrono-thermostat is used, arrange two separate
lines in compliance with current regulations
regarding electrical systems. No boiler pipes
must ever be used to earth the electric system or
telephone lines. Ensure elimination of this risk
before making the boiler electrical connections.

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INSTALLERUSERMAINTENANCE TECHNICIAN
EXTERNAL PROBE
Correction law of the ow temperature depending on the external temperature
and user adjustments of the central heating temperature.
1.10 EXTERNAL TEMPERATURE PROBE
OPTIONAL.
e boiler is designed for the application of the
external temperature probe (Fig. 9), which is
available as an optional kit. Refer to the relative
instruction sheet for positioning of the external
probe.
e probe can be connected directly to the boiler
electrical system and allows the max. system ow
temperature to be automatically decreased when
the external temperature increases, in order to
adjust the heat supplied to the system according
to the change in external temperature. e ex-
ternal probe always operates when connected,
regardless of the presence or type of room
chrono-thermostat used and can work in combi-
nation 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. 10). e
electric connection of the external probe must be
made on clamps 38 and 39 on the terminal board
in the boiler control panel (Fig. 38).
Position of the central heating temperature
user adjustment