Immergas EOLO MYTHOS DOM 10 1E Product manual

EOLO MYTHOS
DOM 10-18-24 1E
Instructions and
warning book
*1.041321ENG*

Product not intended for EU countries.
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 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 warnings
All Immergas products are protected with suitable transport packaging.
e material must be stored in a dry place protected from the weather.
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 at the work
site, environmental 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 an agreed
company, intended as a company 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 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.

MAINTENANCE TECHNICIAN pageINSTALLER page USER page
INDEX
1 Boiler installation......................................5
1.1 Installation recommendations.................5
1.2 Main dimensions.......................................6
1.3 Antifreeze protection................................6
1.4 Gas connection..........................................7
1.5 Hydraulic connection...............................7
1.6 Electrical connection................................7
1.7 Remote controls and room chrono-
thermostats (Optional).............................8
1.8 Flue systems...............................................8
1.9 Tables of resistance factors and equivalent
lengths.......................................................10
1.10 Cover kit installation. .............................11
1.11 Concentric horizontal kit installation. .12
1.12 Concentric vertical Kit installation.......13
1.13 Separator kit installation........................14
1.14 Ducting of ues or technical slots.........16
1.15 Conguration type B22, open chamber
and forced draught for indoors.............16
1.16 Flue exhaust to ue/chimney.................16
1.17 Flues, chimneys and chimney caps.......16
1.18 Water treatment system lling. .............16
1.19 System lling............................................16
1.20 Gas system start-up.................................16
1.21 Boiler start up (ignition). .......................17
1.22 Circulation pump....................................17
1.23 Kits available on request.........................17
1.24 Boiler components..................................18
2 Instructions for use and maintenance..19
2.1 Cleaning and maintenance. ...................19
2.2 General warnings....................................19
2.3 Control panel...........................................19
2.4 Fault and anomaly signals......................20
2.5 Information Menu. .................................22
2.6 Resetting the anomaly history. ..............22
2.7 Boiler shutdown. .....................................22
2.8 Restore central heating system pressure.. 22
2.9 Draining the system................................22
2.10 Antifreeze protection..............................22
2.11 Case cleaning. ..........................................22
2.12 Decommissioning...................................22
3 Commissioning the boiler
(initial check)...........................................23
3.1 Hydraulic diagram. .................................23
3.2 Wiring diagram.......................................24
3.3 Troubleshooting. .....................................24
3.4 Converting the boiler to other types of
gas..............................................................24
3.5 Checks following conversion to another
type of gas.................................................25
3.6 Gas valve calibration...............................25
3.7 Programming the P.C.B..........................26
3.8 „Chimney sweep” function. ...................27
3.9 Heating Timer..........................................27
3.10 ree-way anti-block system.................27
3.11 Pump anti-block function......................27
3.12 Radiators antifreeze function. ...............27
3.13 P.C.B. periodical self-check....................27
3.14 Casing removal........................................28
3.15 Yearly appliance check and maintenance. .29
3.16 Variable heat output................................29
3.17 Combustion parameters.........................31
3.18 Technical data..........................................32
3.19 Key for data nameplate...........................33

5
1-1
INSTALLERUSER
MAINTENANCE TECHNICIAN
NOYES
In the event of malfunctions, faults or incorrect
operation, turn the appliance o and contact an
authorised company (e.g. the Authorised 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:
- installation of gas appliances, ue exhaust
pipes and combustion air intake pipes is
forbidden in places with a fire risk (for
example: 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: wall mounting of the boiler must
guarantee stable and ecient support for the
generator.
e plugs (standard supply) are to be used only in
conjunction with the mounting brackets or xing
template to x the appliance to the wall; they only
ensure adequate support if inserted correctly
(according to technical standards) in walls made
of solid or semi-hollow brick or block. In the
case of walls made from hollow brick or block,
partitions with limited static properties, or in any
case walls other than those indicated, a static test
must be carried out to ensure adequate mount.
Note: the hex head screws supplied in the
blister pack are to be used exclusively to x the
relative mounting bracket to the wall.
ese boilers are used to heat water to below
boiling temperature in atmospheric pressure.
ey must be connected to a central heating
system and domestic hot water circuit suited to
their performance and capacity.
ey cannot be connected directly to low-tem-
perature systems.
1BOILER INSTALLATION.
1.1 INSTALLATION
RECOMMENDATIONS.
e Eolo Mythos Dom 10-18-24 1E boiler has
been designed for wall mounted installation only,
for 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 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 and special maintenance);
- 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. 1-1).
By varying the type of installation the classicati-
on of the boiler also varies, precisely:
- Type B22 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 fumes.
Only professionally enabled companies are
authorised to install Immergas gas appliances.
Attention: the manufacturer declines all liability
for damages caused by boilers removed from
other systems or for any non-conformities of
such equipment.
Installation must be carried out according to
regulation standards, current legislation and in
compliance with local technical regulations and
the required technical procedures.
Before installing the appliance, ensure that it
is delivered in perfect condition; if in doubt,
contact the supplier immediately. Packing ma-
terials (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; it is therefore
recommended to leave at least 45 cm between
the upper part of the boiler and the ceiling and
a gap of 3 cm between the boiler casing and the
vertical sides of the cabinet. Keep all ammable
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 not conveyed away by a
draining funnel), or if there are leaks from the
hydraulic connections; otherwise, the manufac-
turer 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.

6
1-2
INSTALLERUSER
MAINTENANCE TECHNICIAN
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) 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
electricity power supply circuits;
- the boiler is powered constantly;
- the boiler is not in “o” mode;
- the boiler is not in anomaly conditions (Para-
graph 2.4);
- 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.
Note: 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.
1.3 ANTIFREEZE PROTECTION.
Minimum temperature -5°C. e boiler comes
standard with an antifreeze function that activa-
tes 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.
Warning: the excessive use of glycol could jeo-
pardise the proper functioning of the appliance.
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).
1.2 MAIN DIMENSIONS.
Height (mm) Width (mm) Depth (mm)
756 440 240
CONNECTIONS
GAS DOMESTIC
HOT WATER SYSTEM
GAC (*) AF R M
3/4” 1/2” 1/2” 3/4” 3/4”
Key:
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic cold water inlet
R - System return
M - System ow
V - Electrical connection
Note: connection group (optional)
(*) Please note: connection to the boiler - only with ring nut with
sealing gasket.

7
1-3
CAVO ALIMENTAZIONE
INSTALLERUSER
MAINTENANCE TECHNICIAN
POWER CABLE
1.6 ELECTRICAL CONNECTION.
e “Eolo Mythos Dom 10-18-24 1E” boiler
has an IPX5D protection rating for the entire
appliance. Electrical safety of the appliance is
reached only when it is correctly connected to an
ecient earthing system as specied by current
safety standards.
Attention: the manufacturer declines any res-
ponsibility for damage or physical injury caused
by failure to connect the boiler to an ecient
earth system or failure to comply with the refe-
rence standards.
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 overvol-
tage category. When replacing the power supply
cable, contact a qualied rm (e.g. the Autho-
rised Aer-Sales Technical Assistance Service).
e power cable must be laid as shown (Fig. 1-3).
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.
1.5 HYDRAULIC CONNECTION.
Attention: in order not to void the heat primary
exchanger warranty, before making the boiler
connections, carefully clean the heating system
(pipes, radiators, etc.) with special pickling or
de-scaling products to remove any deposits that
could compromise correct boiler operation.
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 1.18.
Hydraulic connections must be made in a
rational way using the couplings on the boiler
template. e boiler safety valve outlet must be
connected to a draining funnel. Otherwise, the
manufacturer declines any responsibility in case
of ooding if the drain valve cuts in.
Attention: the manufacturer declines all liability
in the event of damage caused by the installation
of an automatic lling system.
Attention: to preserve the duration of appliance
eciency features, in the presence of water whose
features can lead to the deposit of lime scale,
installation of the “polyphosphate dispenser” kit
is recommended.
1.4 GAS CONNECTION.
Our boilers are designed to operate with methane
gas (G20) or 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 converted for ope-
ration with the other type of gas (see converting
appliance for other gas types). e dynamic gas
supply (methane or LPG) pressure must also be
checked according to the type used in the boiler,
which must be in compliance, as insucient
levels can reduce generator output and cause
malfunctions.
Ensure correct gas cock connection. e gas
supply pipe must be suitably dimensioned
according to current regulations in order to gu-
arantee correct gas ow rate to the burner even
in conditions of maximum generator output and
to guarantee appliance eciency (technical spe-
ci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.

8
1-4 1-5
INSTALLERUSER
MAINTENANCE TECHNICIAN
seal) to the end stop on the previously installed
element in order to ensure sealing eciency of
the coupling.
Attention: if the exhaust terminal and/or
concentric extension pipe needs shortening,
consider that the internal duct must always
protrude by 5 mm with respect to the external
duct.
• Note: for safety purposes, do not obstruct the
boiler intake/exhaust terminal, even tempora-
rily.
• Note: during the installation of the horizontal
pipes one must maintain a minimum inclina-
tion of the pipes of 3% towards the boiler and
a section clamp with gusset must be installed
every 3 metres for non-insulated pipes and one
every 2 metres for insulated pipes.
Diaphragm installation. For proper boiler
operation a diaphragm must be installed on the
outlet of the sealed chamber and before the intake
and exhaust pipe (Fig. 1-6).
e appropriate diaphragm is chosen based on
type of pipe and its maximum extension: this
calculation can be made using the tables below:
Note: the diaphragms are supplied together with
the boiler.
Important: if the CARV2 remote control 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 eli-
mination of this risk before making the boiler
electrical connections.
1.8 FLUE SYSTEMS.
e manufacturer suggests the use of your own
ue installation by supplying various solutions
separately from the boilers regarding the instal-
lation of air intake terminals and ue exhaust,
which are fundamental for boiler operation.
Attention: the boiler must only be installed
together with an original Immergas air intake
and ue gas exhaust system, except for the C6
conguration, in compliance with the stan-
dards in force. is system can be identied by
an identication mark and special distinctive
marking bearing the note " not for condensing
boilers".
e ue exhaust pipes must not be in contact with
or be near to ammable materials. Moreover,
they must not pass through buildings or walls
made of ammable material.
• Resistance factors and equivalent lengths. Each
ue component has a Resistance Factor based
on experimental tests and specied in the table
below. e Resistance Factor for individual
components is independent from the type of
boiler on which it is installed and has a dimen-
sionless size. It is however, conditioned by the
temperature of the uids that pass through the
pipe and therefore, varies according to applica-
tions for air intake or ue exhaust. Each single
component has a resistance corresponding to
a certain length in metres of pipe of the same
diameter; the so-called equivalent length,
can be obtained from the ratio between the
relative Resistance Factors. All boilers have an
experimentally obtainable maximum Resistance
Factor equal to 100. e maximum Resistance
Factor allowed corresponds to the resistance
encountered with the maximum allowed pipe
length for each type of Terminal Kit. This
information allows calculations to be made to
verify the possibility of setting up various ue
congurations.
Note: to dimension the ue ducting using commer-
cial components, refer to the table of combustion
parameters (Paragraph 3.17).
• Positioning of double lip seals. For correct
positioning of lip seals on elbows and exten-
sions, follow the assembly direction shown in
the gure (Fig. 1-5).
• Coupling extension pipes and concentric
elbows. To install push-tting extensions with
other elements of the ue, proceed as follows:
Install the concentric pipe or elbow with the
male side (smooth) on the female side (with lip
1.7 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. 1-4)
All Immergas chrono-thermostats are connec-
ted with 2 wires only. Carefully read the user
and assembly instructions contained in the
accessory kit.
• On/O digital chrono-thermostat. e chro-
no-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 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 controlV2
(CARV2). In addition to the functions described
in the previous point, the control panel enables
the user to control all the important informati-
on regarding operation of the appliance and the
heating system with the opportunity to easily
intervene on the previously set parameters, wi-
thout having to go to where the appliance is ins-
talled. e panel is provided with self-diagnosis
to display any boiler functioning anomalies.
e 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.
CARV2 or chrono-thermostat On/O electric
connection (Optional). e operations described
below must be performed aer having removed
the voltage from the appliance. Any On/O room
chrono-thermostat must be connected to clamps
40 and 41 eliminating jumper X40 (Fig. 3-2).
Make sure that the On/O thermostat contact is
of the “clean” type, i.e. independent of the mains
voltage, otherwise the P.C.B. would be damaged.
Any CARV2 must be connected to clamps 40 and
41 eliminating jumper X40 on the circuit board,
paying attention not to invert the polarity in the
connections (Fig. 3-2). Connection with the
wrong polarity prevents functioning, but without
damaging the CARV2 The boiler can only be
connected to one remote control.

9
1-6
1-7
1
2
3
4
INSTALLERUSER
MAINTENANCE TECHNICIAN
Diaphragm
(***) Extension in metres
Ø 80 horizontal pipe
with two bends
exhaust intake
--- Ø 45 From 0 to 10
15 blade
(ref. 3
g. 1-6)
Ø 45 Exceeding 10 up to 18
Diaphragm
(***) Extension in metres
Ø 80 vertical pipe
without bends
exhaust intake
--- Ø 45 From 0 to 15
15 blade
(ref. 3
g. 1-6)
Ø 45 Exceeding 15 up to 23
(*) ese maximum extension values are considered
intake with 1 metre of exhaust pipe.
(**)ese maximum extension values are considered
exhaust with 1 metre of intake pipe.
(***)ese maximum extension values are considered
exhaust with 16 metres of intake pipe.
Attention: only for installations with divided
terminals 80/80 it is necessary to remove the
plug located under the sealed chamber, as
shown in the Fig. 1-7).
Diaphragm Duct length in metres
Ø 60/100 horizontal
Ø 87 (ref. 2
g. 1-6) From 0.35 to 1.5
Ø 85 (ref. 1
g. 1-6) From 1.5 to 3.0
Diaphragm Duct length in metres
Ø 60/100 vertical
Ø 87 (ref. 2
g. 1-6) From 0.35 to 3.7
Ø 85 (ref. 1
g. 1-6) From 3.7 to 4.7
Diaphragm Duct length in metres
Ø 80/125 horizontal
Ø 87 (ref. 2
g. 1-6) From 0.35 to 4.6
Ø 85 (ref. 1
g. 1-6) From 4.6 to 7.4
Diaphragm Duct length in metres
Ø 80/125 vertical
Ø 87 (ref. 2
g. 1-6) From 0.35 to 9.5
Ø 85 (ref. 1
g. 1-6) From 9.5 to 12.2
Diaphragm (*) Extension in metres
Ø 80 horizontal pipe
with two bends
exhaust intake
--- Ø 45 From 0 to 28
15 blade
(ref. 3
g. 1-6)
Ø 45 Exceeding 28 up to 35
Diaphragm (*) Extension in metres
Ø 80 vertical pipe
without bends
exhaust intake
--- Ø 45 From 0 to 33
15 blade
(ref. 3
g. 1-6)
Ø 45 Exceeding 33 up to 40
Diaphragm (**) Extension in metres
Ø 80 horizontal pipe
with two bends
exhaust intake
--- Ø 45 From 0 to 27
Diaphragm (**) Extension in metres
Ø 80 vertical pipe
without bends
exhaust intake
--- Ø 45 From 0 to 27
Key:
1 - Concentric ue intake diaphragm Ø 85
2 - Concentric ue intake diaphragm Ø 87
3 - Divided ue discharge diaphragm 15 mm
blade
4 - Divided ue intake diaphragm Ø 45
VIEW FROM UNDERNEATH

10
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.9 TABLES OF RESISTANCE FACTORS
AND EQUIVALENT LENGTHS.
TYPE OF DUCT
Resistance
Factor
(R)
Equivalent length
in m of concentric pipe
Ø 60/100
Equivalent length
in m of concentric pipe
Ø 80/125
Equivalent length
in
m of pipe
Ø 80
Concentric pipe Ø 60/100 m 1 Intake and
Exhaust 16.5 m 1 m 2.8 Intake m 7.1
Exhaust m 5.5
Concentric bend 90° Ø 60/100 Intake and
Exhaust 21 m 1.3 m 3.5 Intake m 9.1
Exhaust m 7.0
Concentric bend 45° Ø 60/100 Intake and
Exhaust 16.5 m 1 m 2.8 Intake m 7.1
Exhaust m 5.5
Terminal complete with intake-exhaust
horizontal concentric Ø 60/100 Intake and
Exhaust 46 m 2.8 m 7.6
Intake m 20
Exhaust m 15
Intake-exhaust terminal
horizontal concentric Ø 60/100 Intake and
Exhaust 32 m 1.9 m 5.3 Intake m 14
Exhaust m 10.6
Intake-exhaust terminal
vertical concentric Ø 60/100 Intake and
Exhaust 41.7 m 2.5 m 7
Intake m 18
Exhaust 14
Concentric pipe 80/125 Ø m 1 Intake and
Exhaust 6 m 0.4 1.0 m Intake m 2.6
Exhaust m 2.0
Concentric bend 90° 80/125 Ø Intake and
Exhaust 7.5 m 0.5 m 1.3 Intake m 3.3
Exhaust m 2.5
Concentric bend 45° Ø 80/125 Intake and
Exhaust 6 m 0.4 1.0 m Intake m 2.6
Exhaust m 2.0
Terminal complete with intake-exhaust
vertical concentric Ø 80/125 Intake and
Exhaust 33 m 2.0 m 5.5
Intake m 14.3
Exhaust m 11.0
Intake-exhaust terminal
vertical concentric Ø 80/125 Intake and
Exhaust 26.5 m 1.6 m 4.4 Intake m 11.5
Exhaust m 8.8
Terminal complete with intake-exhaust
horizontal concentric Ø 80/125 Intake and
Exhaust 39 m 2.3 m 6.5
Intake m 16.9
Exhaust m 13
Intake-exhaust terminal
horizontal concentric Ø 80/125 Intake and
Exhaust 34 m 2.0 m 5.6 Intake m 14.8
Exhaust m 11.3
Concentric adapter from Ø 60/100
to Ø 80/125 with condensate trap Intake and
Exhaust 13 m 0.8 m 2.2 Intake m 5.6
Exhaust m 4.3
Concentric adapter from
Ø 60/100 to Ø 80/125 Intake and
Exhaust 2 m 0.1 m 0.3 Intake m 0.8
Exhaust m 0.6
Pipe Ø 80 m 1 (with and without insu-
lation) Intake 2.3 m 0.1 m 0.4 Intake m 1.0
Exhaust 3 m 0.2 m 0.5 Exhaust m 1.0
Complete intake terminal Ø 80 m 1
(with or without insulation) Intake 5 m 0.3 m 0.8 Intake m 2.2
Intake terminal Ø 80
Exhaust terminal Ø 80 Intake 3 m 0.2 m 0.5 Intake m 1.3
Exhaust 2.5 m 0.1 m 0.4 Exhaust m 0.8
Bend 90° Ø 80 Intake 5 m 0.3 m 0.8 Intake m 2.2
Exhaust 6.5 m 0.4 m 1.1 Exhaust m 2.1
Bend 45° Ø 80 Intake 3 m 0.2 m 0.5 Intake m 1.3
Exhaust 4 m 0.2 m 0.6 Exhaust m 1.3
Divided parallel Ø 80
from Ø 60/100 to Ø 80/80 Intake and
Exhaust 8.8 m 0.5 m 1.5 Intake m 3.8
Exhaust m 2.9

11
1-8
1-9 1-10
INSTALLERUSER
MAINTENANCE TECHNICIAN
e cover kit includes:
N°1 Heat moulded cover
N°1 Gasket clamping plate
N°1 Gasket
N°1 Gasket clamp
e terminal kit includes:
N°1 Gasket
N°1 Exhaust ange Ø 80
N°1 Bend 90° Ø 80
N°1 Exhaust pipe Ø 80
N°1 Wall sealing plate
1.10 COVER KIT INSTALLATION.
• Conguration type B, open chamber and fan
assisted.
Using the special cover kit one can achieve
direct air intake (Fig. 1-8) and ue gas exhaust
in a single chimney or directly outside. In this
conguration the boiler is classied as type B22.
With this conguration:
- air intake takes place directly from the room
in which the appliance is installed;
- the ue gas exhaust must be connected to its
own individual ue or channelled directly into
the external atmosphere.
The technical regulations in force must be
respected.
• Cover kit assembly (Fig. 1-9). Remove the
two plugs and the gaskets present from the two
lateral holes with respect to the central one.
Install the Ø 80 outlet ange on the central hole
of the boiler, taking care to insert the gasket
supplied with the kit and tighten by means of
the screws provided. Install the upper cover,
xing it using the 4 screws present in the kit,
positioning the relevant gaskets. Engage the 90°
Ø 80 bend with the male end (smooth) in the
female end (with lip seal) of the Ø 80 ange unit
until it stops. Introduce the gasket, making it
run along the bend. Fix it using the 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
terminal into the female end of the bend 90° Ø
80, making sure that the relevant wall sealing
plate is already tted; this will ensure hold and
joining of the elements making up the kit.
Max. length of exhaust duct. The flue pipe
(vertical or horizontal) can be extended to a
max. length of 12 linear metres, using insulated
pipes (Fig. 1-25). To prevent problems of ue
gas condensate in the exhaust pipe Ø 80, due to
ue gas cooling through the wall, the length of
the pipe (not insulated) must be limited to just
5 m (Fig. 1-22).

12
C12
1-11 1-12
1-13
C12 C12
1-14
C12
5
4
3
1
2
1
2
3
45
6
INSTALLERUSER
MAINTENANCE TECHNICIAN
• Extensions for Ø 60/100 horizontal kit
(Fig. 1-12). e kit with this conguration can
be extended up to a max. horizontal length of
3 m including the terminal with grid and ex-
cluding the concentric bend leaving the boiler.
is conguration corresponds to a resistance
factor of 100. In this case the special extensions
must be requested.
Note: when the boiler is installed in areas where
very cold temperatures can be reached, a special
anti-freeze kit is available that can be installed as
an alternative to the standard kit.
Horizontal intake - exhaust kits Ø 80/125. Kit
assembly (Fig. 1-13): install the bend with ange
(2) onto the central hole of the boiler inserting
the gasket (1) and tighten using the screws inclu-
ded in the kit. Fit the male end (smooth) of the
adapter (3) up to the end stop on the female side
of the bend (2) (with lip seal). Fit the Ø 80/125
(4) concentric terminal pipe with the male end
(smooth) to the female end of the adapter (3)
(with lip gasket) up to the end stop; making
sure that the internal and external wall sealing
plates have been tted; this will ensure sealing
and joining of the elements making up the kit.
• Extensions for Ø 80/125 horizontal kit
(Fig. 1-14). e kit with this conguration
can be extended up to a maximum length of
7.3 m, including the terminal with grid and
excluding the concentric bend leaving the
boiler and the adapter Ø 60/100 in Ø 80/125.
is conguration corresponds to a resistance
factor of 100. In this case the special extensions
must be requested.
1.11 CONCENTRIC HORIZONTAL KIT
INSTALLATION.
Type C configuration, sealed chamber and
fan assisted.
e position of the terminal (in terms of distan-
ces 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 gas 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 properly installed,
is pleasant to look at on the outside of the buil-
ding. Make sure that the external silicone wall
sealing plate is properly inserted in the wall.
Horizontal intake - exhaust kit Ø 60/100. Kit
assembly (Fig. 1-11): install the bend with ange
(2) onto the central hole of the boiler inserting
the gasket (1) and tighten using the screws in-
cluded in the kit. Couple the concentric terminal
pipe Ø 60/100 (3) with the male end (smooth)
into the female end (with lip seals) of the bend
(2) up to the stop, making sure that the internal
and external wall sealing plate have been tted,
this will ensure sealing and joining of the kit
elements.
e kit includes:
N° 1 - Gasket (1)
N° 1 - Concentric bend Ø 60/100 (2)
N° 1 - Adapter Ø 80/125 (3)
N° 1 - Concentric intake-exhaust terminal Ø 80/125 (4)
N° 1 - Internal wall sealing plate (5)
N° 1 - External wall sealing plate (6)
e kit includes:
N° 1 - Gasket (1)
N° 1 - Concentric bend Ø 60/100 (2)
N° 1 - Int./exhaust concentric terminal Ø 60/100 (3)
N° 1 - Internal wall sealing plate (4)
N° 1 - External wall sealing plate (5)

13
C32
C32
C32
C32
1-16
1-18
1-17
1-15
1
2
3
6
4
7
5
1
2
3
6
8
4
7
5
INSTALLERUSER
MAINTENANCE TECHNICIAN
max. 45%
max. 45%
MAXIMUM LENGTH 12200 mm MAXIMUM LENGTH 4700 mm
tile and insert the intake-exhaust pipe (7). Fit the
Ø 80/125 concentric terminal pipe with the male
side (smooth) to the female side of the adapter (1)
(with lip gaskets) up to the end stop; making sure
that the wall sealing plate (3) has been tted, this
will ensure sealing and joining of the elements
making up the kit.
• Extensions for vertical kit Ø 80/125 (Fig. 1-18).
e kit with this conguration can be extended
up to a max. length of 12.2 m including the ter-
minal. If additional components are assembled,
the length equivalent to the maximum allowed
must be subtracted. In this case specic exten-
sions must be requested.
xed half-shell (7) and insert the intake-exhaust
pipe (6). Fit the Ø 80/125 concentric terminal
pipe with the male end (6) (smooth) to the female
end of the adapter (3) (with lip gasket) up to the
end stop; making sure that the wall sealing plate
(4) has been tted, this will ensure sealing and
joining of the elements making up the kit.
• Extensions for vertical kit Ø 60/100 (Fig. 1-16).
e kit with this conguration can be exten-
ded to a max. straight vertical length of 4.7 m,
including the terminal. This configuration
corresponds to a resistance factor of 100. In
this case specic extensions must be requested.
Vertical kit with aluminium tile Ø 80/125. Kit
assembly (Fig. 1-17): to install the kit Ø 80/125
one must use the anged adapter kit in order
to install the ue system Ø 80/125. Install the
anged adaptor (2) on the central hole of the
boiler, positioning gasket (1) with the circular
projections downwards in contact with the boiler
ange, and tighten using the screws 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 o.
Position the xed half-shell (5) on the aluminium
1.12 CONCENTRIC VERTICAL KIT
INSTALLATION.
Type C configuration, sealed chamber and
fan assisted.
Concentric vertical intake and exhaust kit. is
vertical terminal is connected directly to the
outside of the building for air intake and ue
gas exhaust.
NOTE: 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) must always be observed.
Vertical kit with aluminium tile Ø 60/100.
To use this kit one must use the xing plate kit
60/100 (sold separately).
Kit assembly (Fig. 1-15): install the concentric
ange (2) on the central hole of the boiler inser-
ting the gasket (1) and tighten using the screws in
the kit. Fit the male end (smooth) of the adapter
(3) into the female end of the concentric ange
(2). Imitation aluminium tile installation. Repla-
ce the tile with the aluminium sheet (5), shaping
it to ensure that rainwater runs o. Position the
e kit includes:
N° 1 - Gasket (1)
N° 1 - Female concentric ange (2)
N° 1 - Adapter
Ø 80/125 (3)
N° 1 - Concentric intake-exhaust
pipe Ø 80/125 (4)
N° 1 - Wall sealing plate (5)
N° 1 - Aluminium tile (6)
N° 1 - Fixed half-shell (7)
N° 1 - Mobile half-shell (8)
e xing plate kit includes:
N° 1 - Gasket (1)
N° 1 - Female concentric ange (2)
e Kit includes:
N° 1 - Concentric intake-exhaust pipe Ø
60/100 (3)
N° 1 - Wall sealing plate (4)
N° 1 - Aluminium tile (5)
N° 1 - Fixed half-shell (6)
N° 1 - Mobile half-shell (7)

14
1-19
C42
C52 1-20
1-22
C82
1-21
1
810
66
7
3
2
S
A
4
5
89
C82
INSTALLERUSER
MAINTENANCE TECHNICIAN
max. 45%
pipe and Immergas insulated “Blue Series” ue
kits must be used.
tallation requests a development of the ue to the
discharge that exceeds the recommended 12 m,
due consideration must be given to the formation
of condensate that could take place inside the
Attention: the boiler is designed to evacuate
the combustion products up to a maximum
extension of 27 linear metres from the exhaust,
with 1 m plus 90° bend at the intake. If the ins-
e kit includes:
N°1 - Exhaust gasket (1)
N°1 - Flange gasket (2)
N°1 - Female intake ange (3)
N°1 - Female exhaust ange (4)
N°1 - Anti-pulse plate (5)
N°2 - 90° bends Ø 80 (6)
N°1 - Intake terminal Ø 80 (7)
N°2 - Internal wall sealing plates (8)
N°1 - External wall sealing plate (9)
N°1 - Exhaust pipe Ø 80 (10)
Maximum usable lengths
(including intake terminal with grill and two 90° bends)
NON-INSULATED PIPE INSULATED PIPE
Drain (metres) Intake (metres) Drain (metres) Intake (metres)
1 36.0* 6 29.5*
2 34.5* 7 28.0*
3 33.0* 8 26.5*
4 32.0* 9 25.5*
5 30.5* 10 24.0*
* e air intake pipe can be increased to 2.5 metres if the exhaust bend is
eliminated, 2 metres if the air intake bend is eliminated, 4.5 metres elimi-
nating both bends.
11 22.5*
12 21.5*
• e gure (Fig. 1-21) shows the conguration
with vertical exhaust and horizontal intake.
• Extensions for separator kit Ø 80/80. e max.
vertical straight length (without bends) usable
for Ø 80 intake and exhaust pipes is 41 metres
of which 40 intake and 1 exhaust. is total
length corresponds to a resistance factor of 100.
e total usable length obtained by summing
the Ø 80 intake and exhaust pipe lengths can
reach, as a maximum, the values provided
in the following table. If mixed accessories or
components are used, the maximum extension
can be calculated by using a resistance factor
for each component or its equivalent length.
e sum of these resistance factors must not
exceed 100.
eds) and replace it with the ange (3), positioning
the gasket (2) already present in the boiler and
tighten using the supplied self-threading screws.
Fit the male end (smooth) to the bends (6) in the
female end of the anges (3 and 4). Fit the intake
terminal (7) with the male section (smooth)
in the female section of the bend (6) up to the
stop, ensuring that the internal and external wall
sealing plates are tted. Fit the exhaust pipe (10)
with the male end (smooth) in the female end of
the bend (6) up to the stop, making sure that the
internal wall sealing plate has been tted, this will
ensure sealing and joining of the kit elements.
• Installation clearances (Fig. 1-20). e mini-
mum installation clearance measurements of
the Ø 80/80 separator terminal kit have been
stated in some limit conditions.
1.13 SEPARATOR KIT INSTALLATION.
Type C configuration, sealed chamber and
fan assisted.
This kit allows air to come in from outside
the building and the exhaust to exit from the
chimney, ue or intubated duct through divided
ue exhaust and air intake pipes. Combustion
products are expelled from pipe (S). Air is taken
in through pipe (A) for combustion. Both ducts
can be routed in any direction.
Separator kit Ø 80/80. Kit assembly (Fig. 1-19):
install the ange (4) on the central hole of the
boiler inserting the gasket (1) and tighten using
the hex head and at tip screws contained in the
kit, insert the anti-pulse plate up to the stop (5).
Remove the at ange present in the lateral hole
with respect to the central one (according to ne-

15
C82
1-24
1-25
C82
C82
1-23
1
911
12 6
8
3
2
S
A
4
5
910
7
INSTALLERUSER
MAINTENANCE TECHNICIAN
pipe is very long (over 5 m). e entire intake
pipe is insulated to prevent moist air in the
place where the boiler is installed, in contact
with the pipe cooled by air entering from the
outside. e entire exhaust pipe, except the
elbow leaving the splitter is insulated to reduce
heat loss from the pipe, thus preventing the
formation of fume condensate.
Note.: when installing the insulated pipes, a
section clamp with gusset must be installed
every 2 metres.
e kit includes:
N°1 - Exhaust gasket (1)
N°1 - Flange gasket (2)
N°1 - Female intake ange (3)
N°1 - Female exhaust ange (4)
N°1 - Anti-pulse plate (5)
N°1 - Bend 90° Ø 80 (6)
N°1 - Pipe closure cap (7)
N°1 - Intake terminal Ø 80 insulated (8)
N°2 - Internal wall sealing plates (9)
N° 1 - External wall sealing plate (10)
N°1 - Discharge pipe Ø 80 insulated (11)
N°1 - Concentric bend 90° Ø 80/125 (12)
• Insulation of separator terminal kit. Whenever
there are ue gas condensate problems in the
exhaust pipes or on the external surface of the
intake pipes, on request Immergas supplies
insulated intake-exhaust pipes. Insulation
my be necessary on the exhaust pipe, due to
excessive loss of temperature of the ue gas
on their route. Insulation may be necessary
on the intake pipe as the air entering (if very
cold) may cause the outside of the pipe to fall
below the dew point of the environmental air.
e gures (Fig. 1-24 ÷ 1-25) illustrate dierent
applications of insulated pipes.
Insulated pipes are formed of a Ø 80 internal
concentric pipe and a Ø 125 external pipe with
static air space. It is not technically possible
to start with both Ø 80 elbows insulated, as
clearances will not allow it. However starting
with an insulated elbow is possible by choosing
either the intake or exhaust pipe. When starting
with the insulated intake bend it must be enga-
ged on its ange until it is taken up to end stop
on the ue gas exhaust ange, a situation that
takes the two intake ue gas exhaust outlets to
the same height.
• Temperature loss in insulated ue ducting. To
prevent problems of ue gas condensate in the
insulated exhaust pipe Ø 80, due to ue gas coo-
ling through the wall, the length of the pipe must
be limited to 12 metres. e gure (Fig. 1-25)
illustrates a typical insulation application in
which the intake pipe is short and the exhaust
• Temperature loss in ue pipes (Fig. 1-22). To
prevent problems of ue gas condensate in the
exhaust pipe Ø 80, due to fume cooling through
the wall, the length of the exhaust pipe must be
limited to just 5 m. If longer distances must be
covered, use Ø 80 pipes with insulation (see
insulated separator kit Ø 80/80 chapter).
Insulated separator kit Ø 80/80. Kit assembly
(Fig. 1-23): install the ange (4) on the central
hole of the boiler inserting the gasket (1) and
tighten using the hex head and at tip screws
contained in the kit, insert the anti-pulse plate up
to the stop (5). Remove the at ange contained
in the side hole with respect to the central one
(as needed) and replace it with the ange (3),
positioning the gasket (2) already present in the
boiler and tighten using the supplied self-threa-
dingscrews with tip. Insert and slide cap (7) onto
bend (6) from the male side (smooth), and join
bends (6) with the male side (smooth) in the
female side of ange (3). Fit bend (12) with the
male side (smooth) into the female side of an-
ge (4). Fit the male end (smooth) of the intake
terminal (8) up to the stop on the female end
of the bend (6), making sure you have already
inserted the wall sealing plates (9 and 10) that
ensure correct installation between pipe and
wall, then x the closing cap (7) on the terminal
(8). Join the exhaust pipe (11) with the male side
(smooth) in the female side of the bend (12) to
the end stop, ensuring that the wall sealing plate
(9) is already inserted for correct installation
between the pipe and ue.

16
INSTALLERUSER
MAINTENANCE TECHNICIAN
- Should you be required to provide for water tre-
atment, this should be carried out by comple-
tely desalinating the lling water. As opposed
to the complete soening process, desalinating
the water completely not only removes harde-
ning agents (Ca, Mg), but also eliminates all
other minerals to reduce water-lling conduc-
tivity up to 10 microsiemens/cm. Given its low
conductivity, desalinated water does not only
prevent the formation of lime scale, but also
serves as protection against corrosion.
- Insert a suitable inhibitor / passivator (for
example Cillit HS 23 Combi, Fernox MB-1,
Betz Deaborn Sentinel X100, Copal Salaman-
der System Inhibitor); if required, also insert
appropriate antifreeze (such as for example
Cillit CC45).
- Check the electrical conductivity of the water,
which should be 600 µs/cm or less.
- To prevent corrosion, the water system's PH
should be between 7 and 8.5.
- Check the maximum content of chlorides,
which should be less than 250 mg/l.
Note: for quantities and methods of use of
water-treatment products, refer to the instructi-
ons provided by their manufacturer.
1.19 SYSTEM FILLING.
Once the boiler is connected, proceed with sys-
tem lling via the lling cock (Fig. 2-2).
Filling is performed at low speed to ensure rele-
ase of air bubbles in the water via the boiler and
central heating system vents.
e boiler has a built-in automatic venting valve
on the circulator. Check if the cap is loose. Open the
radiator vent valves.
Close radiator vent valves when only water escapes
from them.
Close the lling valve when the boiler pressure
gauge indicates approx. 1.2 bar.
Note:during theseoperations turn on thecirculation
pump at intervals, by means of the stand-by button
located on the control panel. Vent the circulation
pump by loosening the front cap and keeping the
motor running.
Screw the cap back on aer the operation.
1.20 GAS SYSTEM STARTUP.
To start up the system, make reference to the
Standard:
In particular, for new gas systems:
- open windows and doors;
- avoid presence of sparks or naked ames;
- bleed all air from pipelines;
- check that the internal system is properly sealed
according to the regulations in force.
1.17 FLUES, CHIMNEYS AND CHIMNEY
CAPS.
e ues, chimneys and chimney caps for the
evacuation of combustion products must be in
compliance with applicable standards. Chimneys
and roof-installed exhaust terminals must com-
ply with the outlet height and with the distance
from technical volumes set forth by the technical
standards in force.
Positioning the wall ue exhaust terminals. e
wall ue exhaust terminals must:
- be installed on external perimeter walls of the
building;
- be positioned according to the minimum dis-
tances specied in current technical standards.
Combustion products exhaust of natural
draught or fan assisted appliances in open-
top closed environments. In spaces closed on
all sides with open tops (ventilation pits, cour-
tyards etc.), direct combustion product exhaust
is allowed for natural draught or fan assisted gas
appliances with a heat input range from 4 to 35
kW, provided the conditions as per the current
technical standards are respected.
1.18 WATER TREATMENT SYSTEM
FILLING.
As already mentioned in the previous paragra-
phs, a treatment of the thermal and domestic
system water is required, in compliance with the
local standards in force.
e parameters that inuence the duration and
proper operation of the heat exchanger are the
water's PH, hardness, conductivity, and oxygen,
together with the system's processing residues
(any welding residues), any oil present and cor-
rosion products that can, in turn, cause damage
to the heat exchanger.
To prevent this:
- Before installation on new systems as well as
old ones, clean the system with clean water to
eliminate solid residues contained therein.
- Clean the system with a chemical treatment:
- clean the old and the new system using a
suitable cleaner (e.g. Idraclean Caldt5, Cillit
HS 23 RS, Fernox Superoc, Betz Deaborn
Sentinel X300/X400, Salamander System
Cleaner) combined with thorough washing.
- Check the maximum hardness and amount of
lling water; if the contents and hardness of the
water are less than 15°F, no specic treatment
is required; otherwise, to limit the content
of calcium carbonate, you must provide for
water-lling treatment.
- For lling, you are not allowed to use water
soened with the use of ionic-exchange resins
or distilled water.
1.14 DUCTING OF FLUES OR
TECHNICAL SLOTS.
Ducting is an operation through which by in-
serting one or more relevant pipes, one achieves
a system for the evacuation of the combustion
products of a gas appliance, consisting in the
combination of an existing or new ducting pipe
with a chimney, ue or technical slot (also in new
buildings). Ducting requires ducts declared to
be suitable for the purpose by the manufacturer,
following the installation and user instructions,
provided by the manufacturer and the require-
ments of the regulations in force.
1.15 CONFIGURATION TYPE B22,
OPEN CHAMBER AND FORCED
DRAUGHT FOR INDOORS.
e appliance can be installed inside buildings in
B22 mode; in this eventuality, all technical rules
and national and local regulations in force, must
be complied with.
- Type B open chamber boilers must not be
installed in places where commercial, artisan
or industrial activities take place, which use
products that may develop volatile vapours
or substances (e.g. acid vapours, glues, paints,
solvents, combustibles, etc.), as well as dusts
(e.g. dust deriving from the working of wood,
coal nes, cement, etc.), which may be dama-
ging for the components of the appliance and
jeopardise functioning.
- in B22 conguration, unless otherwise provided
for by local regulations in force: 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 of appliances in B22 congura-
tion is only recommended in places that are not
lived in and which are permanently ventilated.
To install them one must use the cover kit whose
installation is referred to in Paragraph 1.10.
1.16 FLUE EXHAUST TO FLUE/CHIMNEY.
Flue exhaust does not necessarily have to be con-
nected to a branched type traditional ue. e ue
exhaust, for boiler clots installed in C conguration,
can be connected to a special LAS type multiple
ue. For B22 congurations, exhaust is only allo-
wed into individual chimney or directly into the
external atmosphere via a relevant terminal, unless
otherwise provided by local regulations. Multiple
and combined ues must be specially designed
according to the calculation method and requ-
irements of the technical standards in force, by
a professionally qualied company. Chimney or
ue sections for connection of the ue exhaust
pipe must comply with requisites of technical
standards in force.

17
A
B
1-26
C
D
INSTALLERUSER
MAINTENANCE TECHNICIAN
Head (kPa)
Flow rate (l/h)
Head (m H2O)
A = Head available to the system at maximum
speed with by-pass excluded.
B = Head available to the system at maximum
speed with by-pass inserted.
C = Head available to the system at second
speed with by-pass excluded.
D = Head available to the system at second
speed with by-pass inserted.
1.23 KITS AVAILABLE ON REQUEST.
• Connection unit kit (on request). e kit in-
cludes pipes, ttings and cocks (including gas
cock), to carry out all connections to the boiler
system.
• System cut-off valve kits with or without
inspectionable lter (on request) e boiler is
designed for installation of system interception
cocks to be placed on ow and return pipes
of the connection assembly. is kit is very
useful for maintenance because it allows to
empty just the boiler without having to empty
the entire system. Moreover, the version with
lter preserves the functioning characteristics
of the boiler thanks to its inspectionable lter.
• Polyphosphate dispenser kit (on request). e
polyphosphate dispenser reduces the formation
of lime-scale and preserves the original heat
exchange and domestic hot water production
conditions. e boiler is prepared for applicati-
on of the polyphosphate dispenser kit.
e above-mentioned kits are supplied complete
with instructions for assembly and use.
1.22 CIRCULATION PUMP.
e Eolo Mythos Dom 10-18-24 1E series boilers
are supplied with a built-in circulation pump
with three-position electric speed control. e
boiler does not operate correctly with the cir-
culation pump on rst speed. To ensure optimal
boiler operation, in the case of new systems
(single pipe and module) it is recommended to
use the pump at maximum speed. e circulation
pump is already tted with a condenser.
Pump release. If, aer a prolonged period of
inactivity, the circulation pump is blocked,
unscrew the front cap and turn the motor sha
using a screwdriver. Take great care during this
operation to avoid damage to the motor.
By-pass adjustment (det.23 Fig. 1-27). If ne-
cessary, the by-pass can be adjusted according to
system requirements from a minimum (by-pass
excluded) to a maximum (by-pass inserted)
represented by the graph (Fig. 1-26). Make the
adjustment using a at head screwdriver, turn
clockwise and insert the by-pass; by turning it
anti-clockwise it is excluded.
1.21 BOILER START UP IGNITION.
To commission the boiler (the operations listed
below must only be performed by a qualied rm
and without any unauthorised persons):
- check that the internal system is properly
sealed according to the regulations in force;
- ensure that the type of gas used corresponds
to boiler settings;
- check that there are external factors that may
cause the formation of fuel pockets;
- switch the boiler on and ensure correct igniti-
on;
- make sure that the gas ow rate and relevant
pressure values comply with those given in the
manual (Paragraph 3.16);
- ensure that the safety device is engaged in the
event of gas supply failure and check activation
time;
- check activation of the main switch located
upstream from the boiler;
- check that the intake and/or exhaust terminals
(if tted) are not blocked.
e boiler must not be started up even if only
one of the checks should be negative.
Head available to the system.

18
1-27
INSTALLERUSER
MAINTENANCE TECHNICIAN
14 - Primary heat exchanger
15 - System expansion vessel
16 - Burner
17 - System pressure switch
18 - Air vent valve
19 - Boiler pump
20 - D.H.W. heat exchanger
21 - Safety thermostat
22 - 3-way valve (motorised)
23 - Adjustable by-pass
24 - 3 bar safety valve
25 - System draining tting
26 - System lling valve
Note: connection group (optional)
Key:
1 - Sample points (air A) - (ue gases F)
2 - Sealed chamber
3 - Fan
4 - Combustion chamber
5 - Ignition and detection electrodes
6 - D.H.W. ow switch
7 - Gas valve
8 - D.H.W. probe
9 - Positive signal pressure point
10 - Negative signal pressure point
11 - Flue pressure switch
12 - Flue hood
13 - Flow probe
1.24 BOILER COMPONENTS.

19
2-1
INSTALLERUSER
MAINTENANCE TECHNICIAN
10 - Unit of measurement
11 - Heating mode
12 - Winter
13 - Summer
14 - Output eciency
15 - Flame presence
5 - Key (+) to increase the system water
temperature
6 - Key (-) to reduce the system water
temperature
7 - Boiler manometer
8 - Domestic hot water function
9 - Temperature and error code display
Key:
1 - Reset Button
2 - Stand-by / Summer / Winter button
3 - Key (+) used to increase the
DHW temperature setting.
4 - Key (-) used to decrease the
DHW temperature setting.
2.3 CONTROL PANEL.
In the case of work or maintenance to structures
near ducting or devices for ue extraction and the
relative accessories, switch o the appliance and
on completion of the operations make sure that
an authorised company veries the eciency of
the ducting or the devices.
Never clean the appliance or connected parts
with easily ammable substances.
Never leave containers or ammable substances
in the same environment as the appliance.
• Attention: using any components that use
electrical power requires some fundamental
rules to be observed:
- do not touch the appliance with wet or moist
parts of the body; do not touch it when bare-
foot.
- never pull electrical cables or leave the applian-
ce exposed to atmospheric agents (rain, sunli-
ght, etc.);
- the appliance power cable must not be replaced
by the user;
- if the cable is damaged, switch o the appliance
and solely contact an authorised company to
replace it;
- if the appliance is not to be used for a certain
period, disconnect the main power switch
upstream of the appliance.
2INSTRUCTIONS FOR USE AND MAINTENANCE.
2.1 CLEANING AND MAINTENANCE.
Attention: to preserve the boiler's integrity and
keep the safety features, performance and relia-
bility which distinguish it unchanged over time,
maintenance operations must be carried out on a
yearly basis in compliance with that stated in the
“annual check and maintenance of the appliance”
section, in compliance with national, regional, or
local standards in force.
2.2 GENERAL WARNINGS.
Never expose the wall-mounted boiler to direct
vapours from cooking hobs.
Use of the boiler by unskilled persons or children
is strictly prohibited.
Do not touch the ue gas exhaust terminal (if pre-
sent) due to the high temperatures it can reach;
For safety purposes, check that the air intake/
ue exhaust terminals (if tted) are not blocked.
If temporary shutdown of the boiler is required,
proceed as follows:
a) drain the heating system if anti-freeze is not
used;
b) shut-o all electrical, water and gas supplies.

20
INSTALLERUSER
MAINTENANCE TECHNICIAN
Ignition of the boiler. Before ignition make sure
the heating system is lled with water and that the
manometer (7) indicates a pressure of 1 ÷ 1.2 bar.
- Open the gas cock upstream from the boiler.
- Press key (2) and set the boiler on Summer ( )
or Winter ( ).
Note: the button (2) must be pressed and held
for the time required to switch from the Stand-
by ( ), Summer ( ) or Winter ( ) function.
Attention: aer each switch the button must
in any case be released to switch to the next
function.
When in summer position ( ) the domestic
hot water temperature is adjusted with the
buttons (3-4).
When the winter position is selected ( ) the
system water temperature is adjusted with the
buttons (5-6), whilst the domestic hot water
temperature is adjusted using the buttons (3-4),
by pressing (+) to increase and (-) to reduce the
temperature.
From this moment the boiler functions automa-
tically. With no demand for heat (central heating
or domestic hot water production) the boiler goes
to “standby” function, equivalent to the boiler
being powered without presence of ame. Each
time the boiler ignites, the relative ame present
symbol is displayed (15).
2.4 FAULT AND ANOMALY SIGNALS.
In case of an anomaly, the letter "E" appears on
the display alternately with the relevant error
code occurred. e error codes are listed in the
following table.
Error
Code Anomaly signalled Cause Boiler status / Solution
01 No ignition block
In the event of request of room central heating or domestic hot
water production, the boiler does not switch on within the preset
time. Upon appliance commissioning or aer extended downtime,
it may be necessary to eliminate the block.
Press the Reset button (1).
02
Safety thermostat
block (over-tempe-
rature)
During normal operation, if a fault causes excessive overheating
internally, the boiler goes into overheating block. Press the Reset button (1).
03 Flue safety thermostat
anomaly Incorrect setting of parameter P14 (Paragraph 3.7).
Set parameter P14 according to the type of
boiler in use. If necessary, press the Reset
button (1).
05 Flow probe anomaly e board detects an anomaly on the ow NTC probe. e boiler does not start (1).
06 Domestic hot water
probe anomaly
e board detects an anomaly on the domestic hot water NTC
probe. In this case the antifreeze function is also inhibited
In this case the boiler continues to produce
domestic hot water but not with optimal
performance (1).
10 Insucient system
pressure
Water pressure inside the central heating circuit that is sucient to
guarantee the correct operation of the boiler is not detected.
Check on the boiler pressure gauge (1)
that the system pressure is between 1÷1.2
bar and restore the correct pressure if
necessary.
11 Flue pressure switch
anomaly is occurs in case of a fault in the ue pressure switch or the fan. If normal conditions are restored the boiler restarts without having to be reset (1).
20 Parasite ame block - is occurs in the event of a leak on the detection circuit
or anomaly in the ame control unit. Press the Reset button (1).
24 Push button control
panel anomaly e board detects an anomaly on the pushbutton panel. If normal conditions are restored the boiler restarts without having to be reset (1).
(1) If the shutdown or fault persists, contact an authorised company (e.g. Authorised Technical Aer-Sales Service).