Immergas Hercules Condensing 26 2 E User manual

HERCULES
Condensing
26 2 E - 32 2 I
*1.032972IE*
Instruction booklet and
warning IE

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, the respect of which, will conrm your satisfaction
for the Immergas product. Contact our area authorised aer-sales centre as soon as possible to request commissioning. Our technician will verify the
correct functioning conditions; he will perform the necessary calibrations and will demonstrate the correct use of the generator. For any interventions or
routine maintenance contact Immergas Authorised Centres: these have original spare parts and boast of specic preparation directly from the manufacturer.
General recommendations
All Immergas products are protected with packaging suitable for transport. e material must be stored in dry environments and protected from bad weather.
e instruction book is an integral and essential part of the product and must be consigned to the new user also 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 instruction booklet contains technical information on how installing Immergas boilers. For other issues related to installation of boilers (i.e.: safety in
work sites, environment protection, injury prevention), comply with the laws in force and technical standards. In compliance with legislation in force, the
systems must be designed by qualied professionals, within the dimensional limits established by the Law. Installation and maintenance must be performed in
compliance with the regulations in force, according to the manufacturer’s instructions and by professionally qualied sta, intending sta with specic technical
skills in the plant sector, as envisioned by the Law. Improper installation or assembly of Immergas appliance and/or components, accessories, kit and devices
can cause unexpected problems to persons, animals and objects. Read the provided product instructions carefully in order to install the product correctly.
Maintenance must be carried out by skilled technical sta. e Immergas Authorised Aer-sales Service represents a guarantee of qualications and profes-
sionalism. 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.
For further information regarding legislative and statutory provisions relative to the installation of gas heat generators, consult the Immergas site at the fol-
lowing address: www.immergas.com
INDICE
USER pag.
Immergas S.p.A. 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.
INSTALLATOR pag. MAINTENANCE pag.
DECLARATION OF CONFORMITY
For the purpose and eect of the Gas Appliance Directive 2009/142/CE, EMC Directive 2004/108/CE, Boiler Eciency Directive 92/42/CE and Low
Voltage Directive 2006/95/CE.
e Manufacturer: Immergas S.p.A. v. Cisa Ligure n° 95 42041 Brescello (RE)
DECLARES THAT: the Immergas boiler model: Hercules Condensing 26 2 E - 32 2 I
is in compliance with the same European Community Directives Signature:
Mauro Guareschi
Research & Development Director
1 Boiler installation. ................................................3
1.1 Installation recommendations. ..........................3
1.2 Main dimensions. ................................................3
1.3 Attachments. ........................................................................4
1.4 Remote controls and room timer thermostats
(optional). .............................................................5
1.5 External temperature probe (optional). ............5
1.6 Immergas ue systems. .......................................6
1.7 Tables of resistance factors and equivalent
lengths. ..................................................................6
1.8 Installation of boiler type b23open chamber
and fan (assisted). ................................................8
1.9 Horizontal concentric kit installation. ..............9
1.10 Vertical concentric kit installation. .................10
1.11 Separator kit installation. ..................................11
1.12 Adapter kit installation c9. ...............................12
1.13 Ducting of ues or technical slots. ..................13
1.14 Conguration type b23 open chamber and
forced draught for inside...................................13
1.15 Flue exhaust to ue/chimney. ...........................13
1.16 Flues, chimneys, chimney caps and
terminals. ............................................................14
1.17 System lling. .....................................................14
1.18 Filling the condensate trap. ..............................14
1.19 Gas system start-up. ..........................................14
1.20 Boiler start up (ignition). ..................................14
1.21 Domestic hot water storage tank unit. ............15
1.22 Kits available on request. ..................................15
1.23 Circulation pump. Version ‘1’ ..........................16
1.24 Circulation pump. Version ‘2’ ..........................16
1.25 Boiler components. ............................................18
2 User and maintenance instructions. ................19
2.1 Cleaning and maintenance. ..............................19
2.2 General warnings. ..............................................19
2.3 Control panel. .....................................................19
2.4 Description of functioning states. ...................20
2.5 Using the boiler. .................................................20
2.6 Fault and anomaly signals.................................21
2.7 Boiler shutdown. ................................................23
2.8 Restore central heating system pressure. ........23
2.9 System draining..................................................23
2.10 Draining the boiler. ...........................................23
2.11 Anti-freeze protection. ......................................23
2.12 Case cleaning. .....................................................23
2.13 Decommissioning. .............................................23
2.14 Parameters and information menu. ................24
3 Boiler start-up (initial check). ..........................25
3.1 Hydraulic diagram. ............................................25
3.2 Wiring diagram. .................................................26
3.3 Troubleshooting. ................................................26
3.4 Converting the boiler to other types of gas. ...26
3.5 Calibration of number of fan revs. ..................27
3.6 Adjustment of the air-gas ratio. .......................27
3.7 Checks following conversion to another
type of gas. ..........................................................27
3.8 Programming the P.C.B. ...................................28
3.9 “Chimney sweep function”. ...............................32
3.10 Pump anti-block function. ...............................32
3.11 ree-way anti-block function.........................32
3.12 Radiators anti-freeze function. ........................32
3.13 P.C.B. Periodical self-check. .............................32
3.14 Automatic vent function. ..................................32
3.15 Solar panels coupling function. .......................32
3.16 Yearly appliance check and maintenance. ......32
3.17 Casing removal. ..................................................32
3.18 Variable heat output. .........................................34
3.19 Combustion parameters. ..................................35
3.20 Technical data. ....................................................36

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INSTALLATORUSERMAINTENANCE
1 BOILER INSTALLATION.
1.1 INSTALLATION
RECOMMENDATIONS.
e Hercules Condensing boiler has been de-
signed uniquely for oor-installation, for the
heating of rooms for domestic use and similar.
In the event the appliance is installed in humid
environments, an insulation system must be
provided underneath from the laying surface.
e installation site and relative Immergas ac-
cessories must have suitable characteristics (both
technical and structural), in order to allow (al-
ways in safe, eciency and easiness conditions):
- installation (according to the legislation and
technical standards in force);
- maintenance operations (including those
scheduled, periodical, ordinary and special);
- removal (to the outdoors in a place suitable
for loading and transporting appliances and
components) as well as any replacement with
equivalent appliances and/or components.
By varying the type of installation the classica-
tion of the boiler also varies, precisely:
- Type B boiler23 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 qualied heating/plumbing
technicians are authorised to install Immergas
gas appliances.
Installation must be carried out according to the
standards, current legislation and in compliance
with local technical 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 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 30 cm on the right of
the boiler in order to open the lateral hatch and a
space of 3 cm between the remaining sides of the
boiler and the sides of the cabinet. Leave adequate
space above the boiler for possible water and
fume removal connections. Keep all ammable
objects away from the appliance (paper, rags,
plastic, polystyrene, etc.).
1.2 MAIN DIMENSIONS.
Key
RA3 - Zone 3 high temperature system
return G 3/4” (optional)
MA3 - Zone 3 high temperature system ow
G 3/4” (optional)
RA2 - Zone 2 high temperature system
return G 3/4” (optional)
MA2 - Zone 2 high temperature system ow
G 3/4” (optional)
RB2 - Zone 2 low temperature system
return G 1” (optional)
MB2 - Zone 2 low temperature system ow
G 1” (optional)
RB1 - Zone 1 low temperature system
return G 1” (optional)
MB1 - Zone 1 low temperature system ow
G 1” (optional)
RA1 - Zone 1 high temperature system
return G 3/4”
MA1 - Zone 1 high temperature system
ow G 3/4”
G - Gas supply G 1/2”
AC - DHW output G 3/4”
AF - DHW input G 3/4”
RC - Recirculation G 3/4” (optional)
RP - Solar panels return G 3/4” (optional)
MP - Solar panels ow G 3/4” (optional)
SC - Condensate drain (minimum
internal diameter Ø 13 mm)
In the event of malfunctions, faults or incorrect
operation, turn the appliance o immediately and
contact a qualied technician (e.g. the Immergas
Technical Assistance centre, which has specical-
ly 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 in places with a re risk is pro-
hibited (for example: garages, box), gas ap-
pliances and relative ue ducts, ue exhaust
pipes and combustion air intake pipes.
- Installation is also prohibited in places/en-
vironments that constitute common parts of
oce condominiums such as stairs, cellars,
entrance halls, attics, los, escape routes,
etc. if they are not located inside technical
compartments under the responsibility of
each individual building and only accessible
to the user.
Important: these boilers are used to heat water
to below boiling temperature in atmospheric
pressure.ey must be connected to a central
heating system and hot water circuit suited to
their performance and capacity. ey must be
installed in rooms where the temperature can-
not fall below 0°C and must not be exposed to
atmospheric agents.

CAVO ALIMENTAZIONE
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INSTALLATORUSERMAINTENANCE
Anti-Legionella thermal treatment of the Im-
mergas storage tank (which can be activated
through the specic function present on the set
thermoregulation systems): during this phase,
the water temperature inside the storage tank ex-
ceeds 60 °C resulting in burns hazards. Keep this
DHW treatment under control (and inform the
users), to prevent unexpected damage to persons,
animals and objects. If required, a thermostatic
valve must be installed at the DHW outlet to
prevent burns.
1.3 ATTACHMENTS.
Gas connection (Appliance category II2H3B/P).
Our boilers are designed to operate with methane
gas (G20) and LPG. Supply pipes must be the
same as or larger than the 3/4”G boiler tting.
Before connecting the gas line, carefully clean
inside all the fuel feed system pipes to remove any
residue that could impair boiler eciency. Also
make sure the gas corresponds to that for which
the boiler is prepared (see boiler data-plate). If
dierent, the appliance must be converted for
operation with the other type of gas (see conver-
ting appliance for other gas types). e dynamic
gas supply (methane or LPG) pressure must also
be checked according to the type used in the
boiler, as insucient levels can reduce generator
output and cause malfunctions. Ensure correct
gas cock connection.
e gas supply pipe must be suitably dimensio-
ned according to current regulations in order to
guarantee correct gas ow to the burner even in
conditions of maximum generator output and to
guarantee appliance eciency (technical speci-
cations). e coupling system must conform
to standards.
Fuel gas quality. e appliance has been desig-
ned to operate with gas free of impurities; other-
wise it is advisable to t special lters upstream
from the appliance to restore the purity of the gas.
Storage tanks (in case of supply from LPG
depot).
- New LPG storage tanks may contain residual
inert gases (nitrogen) that degrade the mixture
delivered to the appliance causing functioning
anomalies.
- Due to the composition of the LPG mixture,
layering of the mixture components may occur
during the period of storage in the tanks. is
can cause a variation in the heating power of
the mixture delivered to the appliance, with
subsequent change in its performance.
Hydraulic connection.
Important: in order not to void the warranty
before making the boiler connections, carefully
clean the heating system (pipes, radiators, etc.)
with special pickling or de-scaling products to
remove any deposits that could compromise
correct boiler operation.
In compliance with Standards in force it is man-
datory to treat the water in the heating system
chemically in order to protect the system and
appliance from deposits of lime scale.
Water connections must be made in a rational
way using the couplings on the boiler template.
e boiler safety valves outlet must be connected
to a draining funnel. Otherwise, the manufactu-
rer declines any responsibility in case of ooding
if the drain valve cuts in.
Important: to preserve the duration of appliance
eciency features, in the presence of water whose
features can lead to the deposit of lime scale,
installation of the “polyphosphate dispenser” kit
is recommended. On the basis of the Standards in
force, it is mandatory to treat the water with over
25 French degrees in the heating circuit and over
15 French degrees for DHW using conditioning
chemicals for powers < 100 kW or with soeners
for powers > 100 kW.
Condensate drain. To drain the condensate
produced by the appliance, it is necessary to
connect to the drainage system by means of acid
condensate resistant pipes having an internal dia-
meter of at least 13 mm. e system connecting
the appliance to the drainage system must be
carried out in such a way as to prevent freezing of
the liquid contained in it. Before appliance start-
up, ensure that the condensate can be correctly
removed. Also, comply with national and local
regulations on discharging waste waters.
Electrical connection: e “Hercules Conden-
sing” 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 efficient earthing system as
specied by current safety standards.
Important: Immergas S.p.A. declines any re-
sponsibility for damage or physical injury caused
by the failure to connect the boiler to an ecient
earthing system or failure to comply with the
reference standards.
Also ensure that the electrical installation corre-
sponds to maximum absorbed power specica-
tions as shown on the boiler data-plate.
e 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 over-voltage category. When replacing
the power supply cable, contact a qualied tech-
nician (e.g. the Immergas Aer-Sales Technical
Assistance Service).
e power cable must be laid as shown.
In the event of mains fuse replacement on the
control card, use a 3.15A quick-blow fuse. For
the main power supply to the appliance, never
POWER SUPPLY CABLE

45
31
58
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1-3 1-4
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INSTALLATORUSERMAINTENANCE
EXTERNAL PROBE:
Correction law of the ow temperature depending on the external tem-
perature and user adjustments of the central heating temperature.
use adapters, multiple sockets or extension leads.
1.4 REMOTE CONTROLS AND
ROOM TIMER THERMOSTATS
OPTIONAL.
e boiler is prepared for the application of room
timer thermostats or remote controls, which are
available as optional kits.
All Immergas timer thermostats are connected
with 2 wires only. Carefully read the user and
assembly instructions contained in the acces-
sory kit.
• On/O digital timer thermostat (Fig. 1-3). e
timer thermostat allows:
- to set two room temperature values: one for
day (comfort temperature) and one for night
(lower temperature);
- to set up to four on/o dierential weekly
programs;
- to select the required operating mode from
the various possible alternatives:
• permanent functioning in comfort temp.
• permanent functioning in reduced temp.
• permanent functioning in adjustable anti-
freeze temp.
e timer thermostat is powered by two 1.5V
LR 6 type alkaline batteries;
• ere are two types of remote controls availa-
ble: Comando Amico Remoto remote controlV2
(CARV2) (Fig. 1-3) and Super Comando Amico
Remoto remote control (Super CAR) (Fig. 1-4)
both with room timer thermostat functioning.
In addition to the functions described in the
previous point, the timer thermostat panels
enable the user to control all the important
information regarding operation of the ap-
pliance and the central heating system with
the opportunity of easily intervening on the
previously set parameters without having to go
to the place where the appliance is installed. e
panel is provided with self-diagnosis to display
any boiler functioning anomalies. e climate
timer 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 timer thermostat is fed directly by
the boiler by means of the same 2 wires used
for the transmission of data between boiler and
timer thermostat.
Important: if the system is subdivided into
zones using the relevant kit the CARV2 and the
Super CAR must be used with its climate ther-
mostat function disabled, i.e. it must be set to
On/O mode.
CARV2, Super CAR or On/O timer thermostat
electrical connection (Optional). e operations
described below must be performed aer having
removed the voltage from the appliance. e even-
tual On/O environment timer thermostat must
be connected to clamps 40 and 41 eliminating
jumper X40 (Fig. 3-2). Make sure that the On/
O thermostat contact is of the “clean” type, i.e.
independent of the mains supply, otherwise the
electronic adjustment card would be damaged.
Any CARV2 or Super CAR must be connected
by means of terminals IN+ and IN- to terminals
42 and 43 on the P.C.B. (in boiler), eliminating
jumper X40 and respecting polarity (Fig. 3-2).
Connection with the wrong polarity prevents
functioning, but without damaging the CARV2
e boiler can only be connected to one remote
control.
Important: if the Comando Amico Remoto
remote controlV2 is used, arrange two separate
lines in compliance with current regulations
regarding electrical systems. Boiler pipes must
never be used to earth the electric or telephone
lines. Ensure elimination of this risk before ma-
king the boiler electrical connections.
Installation with system operating at direct
low temperature. e boiler can directly feed a
low temperature system by acting on parameter
“P66” (Par. 3.8) and setting the ow temperature
adjustment range“P66/A” and “P66/B”. In this si-
tuation it is good practice to insert a safety device
in series with the power supply and boiler. is
device is made up from a thermostat with a tem-
perature limit of 60°C. e thermostat must be
positioned on the system ow pipe at a distance
of at least 2 metres from the boiler.
1.5 EXTERNAL TEMPERATURE PROBE
OPTIONAL.
e boiler is prepared for the application of the
external probe (Fig. 1-5), which is available as an
optional kit. e probe can be connected directly
to the boiler electrical system and allows the
max. system ow temperature to be automati-
cally decreased when the external temperature
increases, in order to adjust the heat supplied to
the system according to the change in external
temperature. e external probe always operates
when connected, regardless of the presence or
type of room timer thermostat used and can
work in combination with Immergas timer
thermostats. e correlation between system
ow temperature and external temperature is
determined by the parameters set in menu “M5”
under “P66” according to the curves represented
in the diagram (Fig. 1-6). e electric connection
of the external probe must be made on clamps 38
and 39 on the boiler P.C.B. (Fig. 3-2).
TM-MAX/MIN = Selected ow
temp. range.
TE = External temperature.
On/O digital timer thermostat.
Comando Amico Remoto remote controlV2 (CARV2)Super Comando Amico Remoto remote control
(Super CAR)

(A)
(B)
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INSTALLATORUSERMAINTENANCE
1.6 IMMERGAS FLUE SYSTEMS.
Immergas supplies various solutions separately
from the boilers regarding the installation of air
intake terminals and ue extraction, which are
fundamental for boiler operation.
Attention: the boiler must be installed
exclusively with an original Immergas “Green
Range” air intake and fume extraction system
in plastic, as envisioned by Standard in force.
e plastic pipes cannot be installed outdoors,
for tracts longer than 40 cm, without suitable
protection from UV rays and other atmospheric
agents.
This system can be identified by an
identification mark and special distinctive
marking bearing the note: “only for condensing
boilers”.
• Resistance factors and equivalent lengths.
Each ue component has a Resistance Factor
based on experimental tests and specified
in the table below. e Resistance Factor for
individual components is independent from
the type of boiler on which it is installed
and has a dimensionless size. It is however,
conditioned by the temperature of the uids
that pass through the pipe and therefore,
varies according to applications for air intake
or ue exhaust. Each single component has a
resistance corresponding to a certain length
in metres of pipe of the same diameter; the
so-called equivalent length, obtained from the
ratio between the relative Resistance Factors.
All boilers have an experimentally obtainable
maximum Resistance Factor equal to 100.
The maximum Resistance Factor allowed
corresponds to the resistance encountered with
the maximum allowed pipe length for each
type of Terminal Kit. is information allows
calculations to be made to verify the possibility
of setting up various ue congurations.
• Positioning of the gaskets (black) for “green
range” ue extraction systems. Position the
gasket correctly (for bends and extensions)
(Fig. 1-7):
- gasket (A) with notches, to use for bends;
- gasket (B) without notches, to use for
extensions.
N.B.: if component lubrication (already carried
out by the manufacturer) is not sufficient,
remove the residual lubricant using a dry cloth,
then to ease tting spread the elements with
common or industrial talc.
• 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 section
(with lip 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
extension concentric pipe needs shortening,
consider that the internal duct must always
protrude by 5 mm with respect to the external
duct.
• N.B.: for safety purposes, do not obstruct
the boiler intake-exhaust terminal, even
temporarily.
• N.B.: when installing horizontal pipes,
a minimum inclination of 3% must be
maintained and a section clamp with pin must
be installed every 3 metres.
1.7 TABLES OF RESISTANCE FACTORS
AND EQUIVALENT LENGTHS.
TYPE OF DUCT
Resistance
Factor
(R)
Equivalent
length in m of
concentric pipe
Ø80/125
Concentric pipe Ø80/125 m 1 2.1 1
Concentric bend 90° Ø80/125 3.0 1.4
Concentric bend 45° Ø80/125 2.1 1
Terminal complete with concentric
horizontal intake-exhaust Ø80/125 2.8 1.3
Terminal complete with concentric
vertical intake-exhaust Ø80/125 3.6 1.7
Concentric bend 90° Ø80/125 with
inspection 3.4 1.6
Stub pipe with inspection Ø80/125 3.4 1.6

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INSTALLATORUSERMAINTENANCE
TYPE OF DUCT
Resistance
Factor
(R)
Equivalent
length in m of
concentric pipe
Ø60/100
Equivalent
length in metres
of pipe Ø80
Equivalent
length in metres
of pipe Ø60
Equivalent
length in m of
concentric pipe
Ø80/125
Concentric pipe Ø60/100
m 1
Intake and
Exhaust 6.4 m 1 Intake m 7.3 Exhaust m 1.9 m 3.0
Exhaust m 5.3
Concentric bend 90°
Ø60/100
Intake and
Exhaust 8.2 m 1.3 Intake m 9.4 Exhaust m 2.5 m 3.9
Exhaust m 6.8
Concentric bend 45°
Ø60/100
Intake and
Exhaust 6.4 m 1 Intake m 7.3 Exhaust m 1.9 m 3.0
Exhaust m 5.3
Terminal complete with
concentric horizontal
intake-exhaust Ø60/100
Intake and
Exhaust 15 m 2.3
Intake m 17.2
Exhaust m 4.5 m 7.1
Exhaust m 12.5
Concentric horizontal
intake- exhaust terminal
Ø60/100
Intake and
Exhaust 10 m 1.5 Intake m 11.5 Exhaust m 3.0 m 4.7
Exhaust m 8.3
Terminal complete with
concentric vertical intake-
exhaust Ø60/100
Intake and
Exhaust 16.3 m 2.5
Intake m 18.7
Exhaust m 4.9 m 7.7
Exhaust m 13.6
Concentric vertical intake-
exhaust terminal Ø60/100
Intake and
Exhaust 9 m 1.4
Intake m 10.3
Exhaust m 2.7 m 4.3
Exhaust m 7.5
Pipe Ø80, 1 m Intake 0.87 m 0.1 Intake m 1.0 Exhaust m 0.4 m 0.4
m 0.5
Exhaust 1.2 m 0.2 Exhaust m 1.0
Complete intake terminal
Ø80, 1 m Intake 3 m 0.5 Intake m 3.4 Exhaust m 0.9 m 1.4
Intake terminal Ø 80
Exhaust terminal Ø 80
Intake 2.2 m 0.35 Intake m 2.5 Exhaust m 0.6 m 1
m 0.9
Exhaust 1.9 m 0.3 Exhaust m 1.6
Bend 90° Ø80 Intake 1.9 m 0.3 Intake m 2.2 Exhaust m 0.8 m 0.9
m 1.2
Exhaust 2.6 m 0.4 Exhaust m 2.1
Bend 45° Ø80 Intake 1.2 m 0.2 Intake m 1.4 Exhaust m 0.5 m 0.5
0.7
Exhaust 1.6 m 0.25 Exhaust m 1.3
Pipe Ø60 m 1 for ducting Exhaust 3.3 m 0.5 Intake 3.8 Exhaust m 1.0 m 1.5
Exhaust 2.7
Bend 90° Ø60 for ducting Exhaust 3.5 m 0.55 Intake 4.0 Exhaust m 1.1 m 1.6
Exhaust 2.9
Reduction Ø80/60 Intake and
Exhaust 2.6 m 0.4 Intake m 3.0 Exhaust m 0.8 m 1.2
Exhaust m 2.1
Terminal complete with
exhaust vertical Ø60 for
ducting
Exhaust 12.2 m 1.9
Intake m 14
Exhaust m 3.7 m 5.8
Exhaust m 10.1

X4
1-8
8 - IE
INSTALLATORUSERMAINTENANCE
1.8 INSTALLATION OF BOILER TYPE
B23OPEN CHAMBER AND FAN
ASSISTED.
In this conguration the relevant terminal “1”
must be used (present in the appropriate intake
kit for the installation in question) to be placed
on the intake hole above the sealed chamber
(Fig. 1-8). Air intake takes place directly from the
environment and ue exhaust in individual ue
or to the outside. e boiler in this conguration,
following the assembly instructions stated on the
relative instruction sheet, is classied as type B23.
With this conguration:
- air intake takes place directly from the environ-
ment in which the boiler is installed and only
functions in permanently ventilated rooms;
- the ue exhaust must be connected to its own
individual ue or channelled directly into the
external atmosphere.
- 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, sol-
vents, combustibles, etc.), as well as dusts (e.g.
dust deriving from the working of wood, coal
nes, cement, etc.). ese may be damaging for
the components of the appliance and jeopardise
functioning.
The technical regulations in force must be
respected.
Max. length of exhaust duct. The flue pipe
(vertical or horizontal) can be extended to a max.
length of 30 straight metres.

1
2
3
45
6
5
4
3
1
2
1-10
1-9
1-11 1-12
C13
C13
C13 C13
9 - IE
INSTALLATORUSERMAINTENANCE
1.9 HORIZONTAL CONCENTRIC KIT
INSTALLATION.
Type C configuration, sealed chamber and
fan assisted.
Horizontal intake - exhaust kit Ø 60/100.
Assembly kit (Fig. 1-9): install the bend with
ange (2) on the most internal hole of the boiler,
placing the gasket (1) (which does not require
lubrication); positioning it with the circular
projections downwards in contact with the boiler
ange and tighten using the screws present in the
kit. Fit the Ø 60/100 (3) concentric terminal pipe
with the male end (smooth) to the female end
of the bend (2) up to the 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 horizontal kit Ø60/100
(Fig. 1-10). e kit with this conguration
can be extended up to a max. horizontal
distance of 12.9 m including the terminal with
grid and excluding the concentric bend leaving
the boiler. is conguration corresponds to
a resistance factor of 100. In these cases the
special extensions must be requested.
Horizontal intake - exhaust kit Ø80/125. Kit
assembly (Fig. 1-11): for the installation of kit
Ø80/125 the anged adapter kit must be used to
be able to install the ue system Ø80/125. Install
the anged adapter (2) on the most internal hole
of the boiler, positioning the gasket (1) (which
does not require lubrication) with the circular
projections downwards in contact with the boiler
ange and tighten using the screws present in
the kit. Engage the bend (3) with the male side
(smooth) until it is fully home on the adapter (1).
Fit the Ø80/125 (5) concentric terminal pipe with
the male end (smooth) to the female end of the
bend (4) (with lip seal) up to the stop; making
sure that the internal (6) and external wall sealing
plates (7) have been tted, this will ensure sealing
and joining of the elements making up the kit.
• Extensions for horizontal kit Ø80/125
(Fig. 1-12). e kit with this conguration
can be extended up to a max. distance of 32 m
including the terminal with grid and excluding
the concentric bend leaving the boiler. If
additional components are assembled, the
length equivalent to the maximum allowed
must be subtracted. In this case the special
extensions must be requested.
• External grid. N.B.: for correct functioning
of the system the terminal with grid must be
installed correctly ensuring that, the "high"
indication present on the terminal is respected
on installation.
e kit includes:
N° 1 - Gasket (1)
N° 1 - Concentric bend Ø60/100 (2)
N° 1 - Concentric intake-exhaust terminal Ø60/100 (3)
N° 1 - Internal wall sealing plate (4)
N° 1 - External wall sealing plate (5)
e adapter Kit includes:
N° 1 - Gasket (1)
N° 1 - Adapter
Ø80/125 (2)
e Kit Ø80/125 includes:
N° 1 - Concentric bend Ø80/125 at 87° (3)
N° 1 - Concentric intake-exhaust terminal
Ø80/125 (4)
N° 1 - Internal wall sealing plate (5)
N° 1 - External wall sealing plate (6)
e remaining components of the kit are not
to be used

1
2
3
4
5
6
7
7
46
5
1
2
3
1-141-13
1-161-15
C33
C33
C33
C33
10 - IE
INSTALLATORUSERMAINTENANCE
1.10 VERTICAL CONCENTRIC KIT
INSTALLATION.
Type C configuration, sealed chamber and
fan assisted.
Vertical concentric of intake and exhaust kit.
is terminal enables the air intake and the ue
exhausts to be directly emitted outside the house
in a vertical direction.
N.B.: the vertical kit with aluminium tile
enables installation on terraces and roofs with
a maximum slope of 45% (approximately 25°)
and the height between the terminal cap and
half-shell (374 mm for Ø60/100 and 260 mm for
Ø80/125) must always be respected.
Vertical kit with aluminium tile Ø 60/100.
Kit assembly (Fig. 1-13): install the concentric
ange (2) on the most internal hole of the boi-
ler, positioning the gasket (1) (which does not
require lubrication); with the circular projections
downwards in contact with the boiler ange and
tighten using the screws present in the kit.
Imitation aluminium tile installation: replace the
tile with the aluminium sheet (4), shaping it to
ensure that rainwater runs o. Position the xed
half-shell (6) and insert the intake-exhaust pipe
(5). Fit the Ø 60/100 (3) concentric terminal pipe
with the male end (5) (smooth) into the ange (2)
up to the stop; making sure that the wall sealing
plate has been tted (3), this will ensure sealing
and joining of the elements making up the kit.
• Extensions for vertical kit Ø60/100 (Fig. 1-14).
The vertical kit with this configuration
can be extended to a max. straight vertical
length of 14.4 m including the terminal. is
conguration corresponds to a resistance factor
of 100. In this case the special extensions must
be requested.
Vertical kit with aluminium tile Ø80/125.
Kit assembly (Fig. 1-15): for the installation of kit
Ø80/125 the anged adapter kit must be used to
be able to install the ue system Ø80/125. Install
the anged adapter (2) on the internal hole of the
boiler, positioning the gasket (1) (which does not
require lubrication) with the circular projections
downwards in contact with the boiler ange
and tighten using the screws preset in the kit.
Imitation aluminium tile installation: replace
the tile with the aluminium sheet (4), shaping
it to ensure that rainwater runs o. Position
the xed half-shell (5) on the aluminium tile
and insert the intake-exhaust pipe (7). Fit the
Ø80/125 concentric terminal pipe with the male
end (smooth) to the female end of the adapter
(1) (with lip gasket) up to the stop; making sure
that the wall sealing plate has been tted (3), this
will ensure sealing and joining of the elements
making up the kit.
• Extensions for vertical kit Ø80/125 (Fig. 1-16).
e vertical kit with this conguration can be
extended to a max. length of 32 m including
the terminal. If additional components are
assembled, the length equivalent to the
maximum allowed must be subtracted. In this
case specic extensions must be requested.
e kit includes:
N° 1 - Gasket (1)
N° 1 - Female concentric ange (2)
N° 1 - Wall sealing plate (3)
N° 1 - Aluminium tile (4)
N° 1 - Int./exhaust concentric pipe
Ø60/100 (5)
N° 1 - Fixed half-shell (6)
N° 1 - Mobile half-shell (7)
e adapter Kit includes:
N° 1 - Gasket (1)
N° 1 - Adapter
Ø80/125 (2)
e Kit Ø80/125 includes:
N° 1 - Wall sealing plate (3)
N° 1 - Aluminium tile (4)
N° 1 - Fixed half-shell (5)
N° 1 - Mobile half-shell (6)
N° 1 - Int./exhaust concentric
pipe Ø80/125 (7)
e remaining components of the
kit are not to be used

1
4
79
556
7
8
3
2
S
A
1-19
1-181-17
C83
C43C53
11 - IE
INSTALLATORUSERMAINTENANCE
minimum slope 1.5%
1.11 SEPARATOR KIT INSTALLATION.
Type C configuration, sealed chamber and
fan assisted.
Separator kit Ø80/80. is kit allows the air
intake from outside the home and the flue
exhaust into a chimney or ue by means of the
separation of the ue exhaust pipes and air intake.
Combustion products are expelled from pipe (S)
(in plastic, so as to resist acid condensate). Air is
taken in through duct (A) for combustion (this
is also in plastic). e intake pipe (A) can be
installed either on the right or le hand side of
the central exhaust pipe (S). Both ducts can be
routed in any direction.
• Kit assembly (Fig. 1-17): install the flange
(4) on the most internal hole of the boiler,
positioning the gasket (1) (which does
not require lubrication), with the circular
projections downwards in contact with the
boiler ange and tighten using the hex screws
with at end present in the kit. Remove the
at ange present in the most external hole
and replace it with the ange (3), positioning
the gasket (2) already present in the boiler
and tighten using the supplied self-threading
screws. Fit the male end (smooth) to the bends
(5) in the female end of the anges (3 and 4).
Fit the intake terminal (6) with the male section
(smooth) in the female section of the bend (5)
up to the stop, ensuring that the internal and
external wall sealing plates are tted. Fit the
exhaust pipe (9) with the male end (smooth)
to the female end of the bend (5) up to the stop;
making sure that the internal wall sealing plate
has been tted. is will ensure sealing and
joining of the elements making up the kit.
• Installation clearance (Fig. 1-18). e minimum
installation clearance measurements of the
Ø80/80 separator terminal kit have been stated
in some limit conditions.
• Extensions for Ø80/80 separator kit. The
maximum vertical straight length (without
bends) that can be used or Ø80 intake and
exhaust pipes is 41 metres, independently to
whether they are used for intake or exhaust.
e maximum horizontal straight length (with
bend in suction and in exhaust) that can be
used or Ø80 intake and exhaust pipes is 36
metres independently to whether they are used
for intake or exhaust.
N.B.: to favour the removal of possible condensate
forming in the exhaust pipe, tilt the pipes towards
the boilers with a min. slope of 1.5%. (Fig. 1-19).
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° 2 - Bend 90° Ø80 (5)
N° 1 - Intake terminal Ø80 (6)
N° 2 - Internal wall sealing plates (7)
N° 1 - External wall sealing plate (8)
N° 1 - Exhaust pipe Ø80 (9)

12
3
3
3
4567
689
A
10
11
12
12
A
B
A
C
1-21
1-20
12 - IE
INSTALLATORUSERMAINTENANCE
1.12 ADAPTER KIT INSTALLATION C9.
e current kit allows for the installation of one
Immergas boiler in conguration "C93", carrying
out the combustion air intake directly from the
air sha where the ue exhausts are carried out
by means of a ducting system.
System composition.
e kit must be combined with the following
components (sold separately) to be functional
and complete:
- kit C93 version Ø100 or Ø125
- ducting kit Ø60 or Ø80
- flue exhaust kit Ø60/100 o Ø80/125
conguration based on the installation and
the type of boiler.
Kit assembly.
- Assemble the components of kit "C9" on door
(A) of the ducting system (Fig. 1-21).
- (Only version Ø125) install the adapter ange
(11) positioning the concentric gasket (10) on
the boiler and tighten using the screws in the
kit (12).
- Carry out the ducting system assembly as
described in the relative instructions sheet.
- Calculate the distance between the boiler
exhaust and the ducting system bend.
- Prepare the boiler ue by calculating that the
internal pipe of the concentric kit must engage
until the end stop in the ducting system bend
(quota "X" g. 1-22).
N.B.: to favour the removal of possible
condensate forming in the exhaust pipe, tilt
the pipes towards the boiler with a min. slope
of 1.5%.
- Assemble the lid (A) complete with adapter (1)
and wall plugs (6) and assemble the ue to the
ducting system.
N.B.: (only version Ø125) before assembling
check that the positioning of the gaskets is
correct. In the case the components lubrication
(already carried out by the manufacturer) is not
sucient, remove the residual lubricant using a
dry cloth, then to ease tting spread the elements
with common or industrial talc.
Once all the components are assembled correctly
the ue exhausts will be expelled by the ducting
systems, for the normal operation of the boiler
the combustion air will take in the air directly
from the air sha (Fig. 1-22).
Technical data.
- e dimensions of the air shas must guarantee
an minimum gap between the external wall of
the ue pipe and the internal wall of the air
sha: 30 mm per circular section air shas and
20 mm in the case of squared section air sha
(Fig. 1-20).
- On the vertical section of the ue a maximum
of 2 changes of direction with a maximum angle
of incidence of 30° with respect to the vertical.
- The maximum vertical extension using a
ducting system of Ø60 is 13 m, the maximum
extension includes 1 bend Ø60/10 at 90°, 1 m
of pipe 60/100 in horizontal, 1 bend 90° Ø60
ducted and the roof terminal for ducting.
For the determination of the ue system C93 in
dierent congurations than those previously
described (Fig. 1-22) it is necessary to consider
that 1 metre of ducted pipe according to the
indications described, has a resistance factor
equal to 4.9.
- The maximum vertical extension using a
ducting system of Ø80 is 28 m, the maximum
extension includes 1 adapter from 60/100 to
80/125, 1 m bend Ø80/125 to 87°, 1 m of pipe
80/125 in horizontal, 1 bend 90° Ø80 ducted
and the roof terminal for ducting.
For the determination of the ue system C93 in
dierent congurations than those previously
described (Fig. 1-22) it is necessary to consider
the following head loss:
- 1 m of pipe Ø1 m concentric duct Ø80/125
= 1 m of ducted pipe;
- 1 bend at 87° = 1.4 m of dusted pipe.
As a consequence it is necessary to subtract the
equivalent length of the added part to the 28 m
available.
Kit composition:
Ref. Qty Description
1 1 Door adapter Ø100 or Ø125
2 1 Door gasket in neoprene
3 4 Screws 4.2 x 9 AF
4 1 Screw TE M6 x 20
5 1 Flat washer in nylon M6
6 2 Door hole closure steel cap
7 1 Neoprene cap gasket
8 1 Toothed washer M6
9 1 Nut M6
10 1 (kit 80/125) Concentric gasket Ø60/-100
11 1 (kit 80/125) Flanged adapter Ø80/-125
12 4 (kit 80/125) Screws TE M4 x 16 at head screwdriver
- 1 (kit 80/125) Lubricant talc bag
Installation drawings key:
Unmistakeable component identification
present in the kit
Identication component not supplied with
this kit
1
A
Rigid Ø80
Ducting
(A) mm
AIR
SHAFT
(B) mm
AIR
SHAFT
(C) mm
86 126 146
Flexible Ø80
Ducting
(A) mm
AIR
SHAFT
(B) mm
AIR
SHAFT
(C) mm
90 130 150
Rigid Ø60
Ducting
(A) mm
AIR
SHAFT
(B) mm
AIR
SHAFT
(C) mm
66 106 126
Supplied separately:
Ref. Qty Description
A 1 Ducting kit door

X
1-23
1-22
C83
C93
13 - IE
INSTALLATORUSERMAINTENANCE
1.13 DUCTING OF FLUES OR
TECHNICAL SLOTS.
Ducting is an operation through which by the
introduction of one or more relevant pipes,
a system is realised for the evacuation of the
combustion products of a gas appliance made
up from the coupling of an existing or new
ducting pipe with a chimney, ue or technical
slot (also in new buildings) (Fig. 1-23). Ducting
requires the use of ducts declared to be suitable
for the purpose by the manufacturer, following
the installation and user instructions, provided
by the manufacturer and the requirements of
the standards.
Immergas ducting system. e Ø60 rigid and
Ø80 exible “Green Range” ducting systems must
only be used for domestic use and with Immergas
condensing boilers.
In any case, ducting operations must respect
the provisions contained in the standard and in
current technical regulations; in particular, the
declaration of conformity must be compiled at
the end of work and on commissioning of the
ducted system. e instructions in the project
or technical report must likewise be followed, in
cases provided for by the standard and current
technical regulations. e system or components
of the system have a technical life complying with
current standards, provided that:
- it is used in average atmospheric and
environmental conditions, according to
current regulations (absence of combustion
products, dusts or gases that can alter the
normal thermophysical or chemical conditions;
existence of temperatures coming within the
standard range of daily variation, etc.).
- Installation and maintenance must be
performed according to the indications
supplied by the manufacturer and in
compliance with the provisions in force.
- e max. possible length of the Ø60 exible
ducting vertical section is equal to 22 m. is
length is obtained considering the complete
Ø80 exhaust terminal, 1m of Ø80 pipe in
exhaust, two 90° Ø80 bends at boiler outlet.
- e max. possible length of the Ø80 exible
ducting vertical section is equal to 30 m.
This length is obtained considering the
complete exhaust terminal, 1m of Ø80 pipe
in exhaust, two 90° Ø80 bends at boiler outlet
for connecting to the ducting system and two
direction changes of the exible tube inside the
ue/technical slot.
- e max. possible length of the Ø60 exible
ducting vertical section is equal to 30 m. is
length is obtained considering the complete
Ø80 exhaust terminal, 1m of Ø80 pipe in
exhaust, two 90° Ø80 bends at boiler outlet.
1.14 CONFIGURATION TYPE B23
OPEN CHAMBER AND FORCED
DRAUGHT FOR INSIDE.
e appliance can be installed inside buildings in
B23 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
damaging for the components of the appliance
and jeopardise functioning.
- In type B23 conguration, the boilers must not
be installed in bedrooms, bathrooms or in
bedsitters.
- The installation of appliances in B2 3
conguration is only recommended outdoors
(in a partially protected place) or in places that
are not lived in and which are permanently
ventilated.
For the installation it is necessary to use the cover
kit found in paragraph 1.9.
1.15 FLUE EXHAUST TO FLUE/CHIMNEY.
Flue exhaust does not necessarily have to be
connected to a branched type traditional ue.
e ue exhaust, for boiler clots installed in C
configuration, can be connected to a special
LAS type multiple ue. For B23 congurations,
exhaust is only allowed into individual flue
or directly into the external atmosphere via a
relevant terminal. e multiple ues and the
combined ues must also only be connected to
type C appliances of the same type (condensing),
having nominal heat inputs that do not dier by
more than 30% less with respect to the maximum
that can be attached and powered by the same
fuel. e thermo-uid dynamic features (ue
ow rate, % of carbon dioxide, % humidity etc...)
of the appliances attached to the same multiple
ues or combined ues, must not dier by more
than 10% with respect to the average boiler
attached. Multiple and combined ues must be
specially designed according to the calculation
method and requirements of the standards, by
professionally qualied technical sta. Chimney
or ue sections for connection of the exhaust
pipe must comply with requisites of technical
standards in force.

14 - IE
INSTALLATORUSERMAINTENANCE
1.16 FLUES, CHIMNEYS, CHIMNEY CAPS
AND TERMINALS.
e ues, chimneys and chimney caps for the
evacuation of combustion products must be in
compliance with standards in force. e chimney
caps and the roof exhaust terminals must respect
the outlet quotas and the distance of the foreseen
technical volumes from the current technical
regulations.
Positioning the wall exhaust terminals. e
exhaust terminals must:
- be installed on external perimeter walls of the
building;
- be positioned according to the minimum
distances specified in current technical
standards.
Combustion products exhaust of natural or
fan assisted appliances in open-top closed
environments. In spaces closed on all sides
with open tops (ventilation pits, air shafts,
courtyards etc.), direct ue exhaust is allowed
for conventional or fan assisted draught gas
appliances with a heating power range from 4 to
35 kW, provided the conditions as per the current
technical standards are respected.
1.17 SYSTEM FILLING.
Once the boiler is connected, proceed with
system lling via the lling valve (Fig. 1-27 and
2-8). Filling is performed at low speed to ensure
release of air bubbles in the water via the boiler
and heating system vents.
e boiler has a built-in automatic venting valve
on the circulator. Check if the cap is loose. Open the
radiator air vent valves.
Close radiator vent valves when only water
escapes from them.
Close the lling valve when the boiler manometer
indicates approx. 1.2 bar.
N.B.: during these operations start/up the
circulation pump at intervals, acting on the main
switch positioned on the control panel. Vent the
circulation pump by loosening the front cap and
keeping the motor running. Re-tighten the cap
aer the operation.
1.18 FILLING THE CONDENSATE TRAP.
On first lighting of the boiler combustion
products may come out the condensate drain;
aer a few minutes’ operation check that this no
longer occurs. is means that the trap is lled
with condensate to the correct level preventing
the passage of combustion products.
1.19 GAS SYSTEM STARTUP.
To start up the system, refer to the current
regulations. This divides the systems and
therefore the start-up operations into three
categories: new systems, modied systems, re-
activated systems.
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 specications.
1.20 BOILER START UP IGNITION.
For issue of the Declaration of Conformity
provided for by Italian Law, the following must
be performed for boiler start-up:
- check that the internal system is properly sealed
according to specications;
- ensure that the type of gas used corresponds to
boiler settings;
- switch the boiler on and ensure correct ignition;
- make sure that the gas ow rate and relevant
pressure values comply with those given in the
manual ( Par. 3.18);
- ensure that the safety device is engaged in the
event of gas supply failure and check activation
time;
- check activation of the main switch located
upstream from the boiler and in the boiler;
- check that the concentric intake-exhaust
terminal (if tted) is not blocked.
e boiler must not be started up even if only
one of the checks should be negative.
N.B.: the boiler preliminary check must be carried
out by a qualied technician. e boiler warranty
is valid as of the date of testing.
e test certicate and warranty is issued to the
user.

1-24
15 - IE
INSTALLATORUSERMAINTENANCE
1.21 DOMESTIC HOT WATER STORAGE
TANK UNIT.
e “Hercules Condensing” boiler is the accumu-
lation type with a capacity of 120 litres. It contains
large coiled stainless steel heat exchanger pipes,
which allow to notably reduce hot water produc-
tion times. ese boilers built with stainless steel
casing and bottoms, guarantee long duration.
e assembly concepts and welding (T.I.G.) are
implemented to the minimum detail to ensure
maximum reliability.
e upper inspection ange ensures practical
control of the storage tank unit and the coiled
heat exchanger and easy internal cleaning.
e domestic water attachments are found on the
ange cover (cold inlet and hot outlet) and also
the magnesium anode holder cap, including the
latter, supplied as standard for internal protection
of the boiler from possible corrosion.
Storage tank unit disassembly. To disassemble
the storage tank unit, empty the boiler system
by acting on the relevant drain tting. Before
carrying out this operation, make sure that the
lling valve is closed. Close the cold water inlet
valve and open any domestic hot water valve.
Loosen the nuts on the system ow and return
pipes (3) and the cold inlet and hot outlet nuts
present on the storage tank unit (1). Loosen the
bracket xing screws (2) Remove the screws
(4) with the relative retainer brackets and slide
the storage tank unit outwards on the relevant
guides. Work in reverse order to assemble the
storage tank unit.
N.B.: every year a skilled technician (e.g.
Immergas Authorised After-sales Service),
must check the eciency of the storage tank
unit Magnesium Anode. e storage tank unit
is prepared for introduction of the domestic hot
water pump tting.
1.22 KITS AVAILABLE ON REQUEST.
• Pump kit (on request). e boiler storage tank
unit is prepared for application of the pump
kit. Immergas supplies a series of ttings and
attachments that allow connection between
the storage tank unit and domestic hot water
system. e pump probe tting is already inser-
ted on the storage unit kit and the indication of
the pump kit attachment is envisioned on the
installation template.
• System shut-o valves kit (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 particularly useful for maintenance as
it allows the boiler to be drained separately
without having to empty the entire system.
• 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 application
of the polyphosphate dispenser kit.
• Zone pumps kit (on request). If the central
heating system is to be divided into several
zones (max. three) in order to interlock them
with separate adjustments and to keep water
ow rate high for each zone, Immergas supplies
zone pump kits on request.
• Low temperature kit (on request). If the central
heating system is to be divided into high tem-
perature zones (radiators) and low temperature
zones (oor plants) in order to interlock them
with separate adjustments and to keep water
ow rate high for each zone, Immergas supplies
the low temperature kit on request.
• Solar panels kit (on request). If solar panels are
to be used for the production of domestic hot
water, on request Immergas supplies the solar
panels kit.
• Low temperature safety thermostat kit. With
the boiler functioning in direct low tempera-
ture (no control downstream from the boiler),
to prevent problems to the low temperature
system a safety thermostat must be inserted
onto the ow pipe.
e above-mentioned kits are supplied complete
with instructions for assembly and use.
STORAGE TANK UNIT DRAINING VALVE
SYSTEM DRAINING VALVE

16 - IE
INSTALLATORUSERMAINTENANCE
1.23 CIRCULATION PUMP.
VERSION ‘1’ FIG. 125
e “Hercules Condensing” range boilers are
supplied with 2 types of pump, both with variable
speed adjuster.
ese settings are suitable for most systems.
• Boiler pump. It has 3-position electric speed
control. e boiler does not operate correctly
with the circulation pump in rst speed. For
optimal boiler functioning of the boiler, use
the pump at maximum speed (max. head).
e circulation pump is already tted with a
capacitor.
Pump release. If the pump should be blocked
aer a long period of inactivity, it must be re-
leased. Loosen the front cap, making sure that
the liquid that escapes cannot cause injury/
damage to persons/objects and turn the mo-
tor sha very carefully using a screwdriver so
as not to damage the latter. Once the pump is
released, close the vent cap.
• Zone 1 pump. The pump is ideal for the
requirements of each heating system in a do-
mestic and residential environment. In fact, the
pump is equipped with electronic control that
allows the advanced functions to be set.
Programme P (P-V) - Proportional curve
(Green LED). is allows the pressure level
(head) to be proportionally reduced as the
system heat demand decreases (ow rate reduc-
tion). anks to this function, the electrical
consumption of the pump will be all the more
reduced: the energy (power) used by the pump
decreases together with the pressure level and
ow rate. With this setting, the pump guar-
antees optimal performance in most heating
systems, thereby being particularly suitable
in single-pipe and two-pipe installations. Any
noise of the water ow in the pipes, valves and
radiators is eliminated by reducing the head.
Optimum conditions for thermal comfort and
acoustic well-being.
Programs C3 and C4 (P-C) - Constant curve
(White or Orange LED). e pump maintains
the pressure level (head) constant as the system
heat demand decreases (ow rate reduction).
With these settings, the pump is suitable for
all oor systems where all the circuits must be
balanced for the same drop in head.
MIN-MAX Program (Blue LED). e pump
is distinguished by adjustable operating curves
by positioning the selector in any point between
the Min and Max positions, thereby satisfying
any installation requirement (from a simple
single-pipe to more modern and sophisticated
systems) and always guarantee optimum per-
formance. e precise working point can be
selected in the entire eld of use by gradually
adjusting the speed.
Adjustments. Turn the selector and set it on
the desired curve to adjust the pump.
Diagnostics in real time: a bright LED (in
various colours) provides information regard-
ing the pump operating status.
Program LED
P (ΔP-V) green
C3 (ΔP-C) - H=3 m white
C4 (ΔP-C) - H=4 m orange
Min - Max blue
ATTENTION! e pump is
blocked but still live. red
Possible pump release. e pump block is
indicated by a xed red LED switching on. Turn
the selector up to the MAX position, discon-
nect and reconnect the power to restart the
automatic release process. e pump will then
activate the procedure that will last a maximum
of 15 minutes and the LED will ash upon each
restart. It then turns blue for a few seconds and
goes back to red if the attempt to restart is not
successful. Once the process is complete, set
the selector back to the desired curve and if
the problem has not bee resolved, perform the
manual release procedure as described below.
- Disconnect the power to the boiler (the LED
goes o).
- Close the system ow and return and let the
pump cool down.
- Empty the system circuit via the relative valve.
- Remove the motor and clean the impeller.
- Once the release is complete, remount the
motor.
- Fill the primary circuit; restore the power of
the boiler and set the desired curve.
Important: there lies a burns hazard in the
presence of high uid temperature and pres-
sure. Burns hazard from coming in contact.
1.24 CIRCULATION PUMP.
VERSION ‘2’ FIG. 126
e “Hercules Condensing kW” range boilers
are supplied with 2 types of pump, both with
variable speed adjuster.
ese settings are suitable for most systems.
• Boiler pump. It has 3-position electric speed
control. e boiler does not operate correctly
with the circulation pump in rst speed. For
optimal boiler functioning, it is advised to use
the pump at maximum speed (max. head). e
pump is already tted with a condenser.
Pump release. If the pump should be blocked
aer a long period of inactivity, it must be rele-
ased. Loosen the front cap, making sure that the
liquid that escapes cannot cause injury/damage
to persons/objects and turn the motor sha
very carefully using a screwdriver so as not to
damage the latter. Once the pump is released,
close the vent cap.
• Zone 1 pump. The speed selector switch is
factory-set in the position marked with a dot.
Whenever performance is insufficient, pro-
gressively increase the value set. If performance
should be excessive or noise occurs due to the
speed of the circulating uid, reduce the speed
progressively. Modify pump performance (head)
by turning the potentiometer on the pump using
a at screwdriver.
Diagnostics. e pump is equipped with a LED
indicator that supplies information regarding the
functioning status of the same.
- Green light: indicates correct functioning.
- Flashing green light: the LED indicates that the
pump is modulating its performance during a
setting change.
- Red light: the pump is blocked.
Pump release. If the pump should be blocked
aer a long period of inactivity (Red LED on),
it must be released. Turn the speed selector
switch positioned on the pump at will to start
the automatic release process (Flashing green
LED), repeat the operation several times. If
the problem persists, remove the power supply
from the boiler, leave the pump to cool, loosen
the front cap, making sure that the liquid that
escapes cannot cause injury/damage to persons/
objects and turn the motor sha very carefully
using a screwdriver so as not to damage the
latter. Once the pump is released, close the vent
cap and re-set the selector switch in the correct
position.

A
B
C
D
E
F
G
H
I
L
A
B
C
1-25
1-26
17 - IE
INSTALLATORUSERMAINTENANCE
Total head available to the system.
Version ‘1’
A = Head available to the system with zone pump at maximum speed
B = Head available to the system with zone pump at minimum speed
C = Pump power at maximum speed
D = Pump power at minimum speed
Power (W)
Flow rate (l/h)
Head (kPa)
E = Head available to the system with pump selector in position C4 (standard setting)
F = Head available to the system with pump selector in position P
G = Head available to the system with pump selector in position C3
H = Pump power with selector in position C4 (standard setting)
I = Pump power with selector in position P
L = Pump power with selector in position C3
Power (W)
Flow rate (l/h)
Head (kPa)
A = Available head in the system with zone circulator speed set to maximum
B = Available head in the system with zone circulator speed set to 4,5
C = Available head in the system with zone circulator speed set to 3
Head (m H2O)
Flow rate (l/h)
Head (kPa)
Total head available to the system.
Version ‘2’

1-27
18 - IE
INSTALLATORUSERMAINTENANCE
1.25 BOILER COMPONENTS.
Key
1 - Stainless steel storage tank
2 - DHW recirculation pump (optional)
3 - 3-way valve (motorised)
4 - Zone 1 one-way valve
5 - Zone 1 pump
6 - Safety thermostat (Low temperature)
(optional)
7 - Flow probe (Low temperature) (optional)
8 - Zone 2 pump (optional)
9 - Mixing valve (optional)
10 - Condensation module
11 - Flue safety thermostat
12 - Burner
13 - Ignition electrode
14 - Detection electrode
15 - Venturi
16 - Gas nozzle
17 - Fan
18 - Domestic water inlet cock
19 - 8 bar safety valve
20 - Air intake pipe
21 - 3 bar safety valve
22 - Domestic hot water expansion vessel
23 - System lling valve
24 - Condensate drain trap
25 - Polyphosphate dispenser (optional)
26 - Domestic hot water probe
27 - Storage tank draining valve
28 - Sample points (air A) - (ue gases F)
29 - Positive signal pressure point
30 - Negative signal pressure point
31 - Manual air vent valve
32 - Air vent valve
33 - Zones management electrical
connection box (optional)
34 - Hydraulic manifold
35 - System expansion vessel
36 - Flow probe
37 - Safety thermostat
38 - Collector draining valve
39 - System pressure switch (absolute)
40 - Boiler Pump
41 - Sealed chamber
42 - Gas valve
43 - System draining valve

2-1
19 - IE
INSTALLATORUSERMAINTENANCE
2 USER AND MAINTENANCE INSTRUCTIONS.
2.1 CLEANING AND MAINTENANCE.
Important: the heating plants must undergo
periodical maintenance (regarding this, see in
the section dedicated to the technician, relative
to “yearly control and maintenance of the ap-
pliance”) and regular checks of energy eciency
in compliance with national, regional or local
provisions in force.
is ensures that the optimal safety, performance
and operation characteristics of the boiler remain
unchanged over time.
We recommend stipulating a yearly cleaning and
maintenance contract with your zone technician.
2.2 GENERAL WARNINGS.
Never expose the suspended boiler to direct
vapours from a cooking surface.
Use of the boiler by unskilled persons or children
is strictly prohibited.
For safety purposes, check that the concentric
air intake/flue exhaust terminal (if fitted), is
not blocked.
If temporary shutdown of the boiler is required,
proceed as follows:
a) drain the water system if anti-freeze is not
used;
b) shut-o all electrical, water and gas supplies.
In the case of work or maintenance to structures
located in the vicinity of ducting or devices for
ue extraction and relative accessories, switch o
the appliance and on completion of operations
ensure that a qualied technician checks ecien-
cy of the ducting or other devices.
Never clean the appliance or connected parts
with highly ammable substances.
Never leave containers and ammable substances
in the same environment as the appliance.
• Attention: the use of components that employ
electrical power requires some fundamental
rules to be observed:
- do not touch the appliance with wet or moist
parts of the body; do not touch when barefo-
ot;
- never pull electrical cables or leave the ap-
pliance exposed to atmospheric agents (rain,
sunlight, etc..);
- the appliance power cable must not be repla-
ced by the user;
- in the event of damage to the cable, switch o
the appliance and only contact qualied sta
for replacement;
- if the appliance is not to be used for a certain
period, disconnect the main power switch.
N.B.: the temperatures indicated by the display
have a tolerance of +/- 3°C due to environmental
conditions that cannot be blamed on the boiler.
Key
- Stand-by - On Button
A - Summer ( ) and winter ( ) functioning mode selection button
B - DHW priority button ( )
C - (RESET) /menu exit (ESC) reset button
D - Menu entry button (MENU)/ data conrmation (OK)
1 - Domestic hot water temperature selector switch
2 - Domestic hot water temperature set
3 - Central heating temperature selector switch
4 - Central heating temperature set
2.3 CONTROL PANEL.
5 - Presence of anomalies
6 - Display of boiler functioning
status
8 - Flame presence symbol and
relative power scale
9 and 7 - Primary heat exchanger output
water temperature
10 - Boiler in stand-by
11 - Boiler connected to remote
control (Optional)
12 - Functioning in summer mode
13 - Anti-freeze function in progress
14 - Functioning in winter mode
15 - Domestic hot water priority
functioning active
16 - Presence of external connected
devices
17 - Display of menu items
18 - Functioning with external
temperature probe active
19 - Display of data conrmation or
menu access
20 and 7 - External temperature display
with external probe connected
(optional)
21 - Display of reset or exit menu
request
22 - Chimney sweep function
in progress
23 - Boiler manometer
24 - Multi-function display

2-2
2-3
2-4
2-5
20 - IE
INSTALLATORUSERMAINTENANCE
2.4 DESCRIPTION OF FUNCTIONING
STATES.
Below nd a list of boiler functioning states that
appear on the multifunction display (24) by me-
ans of the indicator (6) with a brief description.
Refer to the instruction book for a complete
explanation.
2.5 USING THE BOILER.
Before ignition make sure the central heating sy-
stem is lled with water and that the manometer
(23) indicates a pressure of 1 - 1.2 bar;
Open the gas cock upstream from the boiler.
With the boiler o, only the stand-by symbol
(10) appears on the display. By pressing the ( )
button the boiler switches on.
Once the boiler is on, by pressing button “A”
repeatedly, the functioning mode changes and
pass alternatively from summer functioning
mode ( ) and winter functioning mode ( ).
• Summer ( ): in this mode the boiler fun-
ctions only to heat domestic hot water. e
temperature is set using the selector switch
(1) and the relative temperature is shown on
the display (24) by means of the indicator (2)
and the “SET” indication appears (Fig. 2-2). By
turning the selector switch (1) in a clockwise
direction the temperature increases and in an
anti-clockwise direction it decreases.
During the heating of the domestic hot water
“DHW ON” appears on the display (24) on
the status indicator (6) and at the same time
as burner ignition the ame presence indicator
switches on (8) with relative power scale and
the indicator (9 and 7) with the instantaneous
outlet temperature from the primary heat
exchanger.
• Winter ( ): in this mode the boiler functions
both for heating domestic hot water and hea-
ting the environment. e temperature of the
domestic hot water is always adjusted using
the selector switch (1), the central heating tem-
perature is adjusted using the selector switch
(3) and the relative temperature is shown on
the display (24) using the indicator (4) and
the “SET” indication appears (Fig. 2-4). By
turning the selector switch (3) in a clockwise
direction the temperature increases and in an
anti-clockwise direction it decreases.
During the request for central heating “CH
ON” appears on the display (24) on the status
indicator (6) and at the same time as burner
ignition the ame presence indicator switches
on (8) with relative power scale and the indi-
cator (9 and 7) with the instantaneous outlet
temperature from the primary heat exchanger.
In the central heating phase, if the temperature
of the water contained in the plant is sucient
to heat the radiators, the boiler can only fun-
ction with the activation of the boiler pump.
Adjustment of domestic hot water
Functioning in Summer mode with domestic
hot water heating.
Adjustment of the system ow temperature
Winter functioning mode with room central
heating
Display (6) Description of functioning states
SUMMER Summer functioning mode without request in progress.
Boiler in stand-by for domestic hot water request.
WINTER Winter functioning mode without request in progress.
Boiler in stand-by for domestic hot water or central heating request.
DHW ON Domestic hot water mode in progress.
Boiler functioning, domestic hot water heating in progress.
CH ON Central heating mode in progress.
Boiler functioning, central heating in progress.
F3 Anti-freeze mode in progress.
Boiler functioning to restore the minimum safety temperature against boiler freezing.
CAR OFF Remote Control (Optional) o.
DHW OFF
With domestic hot water priority disabled (indicator 15 o), the boiler only functions
in room central heating mode for duration of 1 hour, however keeping the domestic hot
water at minimum temperature (20°C), aer which the boiler goes back to the normal
functioning, previously set.
In the case of use with Super CAR in concomitance with the functioning period in redu-
ced D.H.W. Timer mode, DHW OFF will appear on the display and indicators 15 and 2
switch o (see Super CAR instructions manual).
F4
Postventilation in progress.
Fan in function aer a request for domestic hot water or central heating in order to
evacuate residual fumes.
F5
Postcirculation in progress.
Pump in function aer a request for domestic hot water or central heating in order to cool
the primary circuit.
P33
With Remote Control (Optional) or environment thermostat (TA) (Optional) in block,
the boiler functions all the same in central heating mode. (Can be activated through the
“Customisation” menu. It allows to activate the central heating even if the Remote Control
or TA are out of order).
STOP
Reset attempts nished
Wait for 1 hour to re-acquire 1 attempt.
(See Ignition block).
ERR xx Anomaly present with relative error code.
e boiler does not work. (see troubleshooting paragraph).
SET During the rotation of the domestic hot water temperature selector switch (1 Fig. 2-1)
view the state of the adjustment of the domestic hot water temperature in progress.
SET During rotation of the central heating selector switch (3 Fig. 2-1) the adjustment status of
the boiler ow temperature for central heating is displayed.
SET
In presence of the external probe (optional) replace the “SET” item.
e value that appears is the correction of the ow temperature with respect to the
functioning curve set by the external probe. See OFFSET on external probe graphics (Fig.
1-6).
F8
System deaeration in progress.
During this phase, which lasts 18 hours, the boiler pump is started at pre-established
intervals, thus allowing deaeration of the central heating system.
F9
Only in the case of use with Super CAR, does it allow to activate the anti-legionella fun-
ction, which takes the temperature of the water in the storage tank to 65°C for 15 minutes.
(see Super CAR instruction manual).