Immergas Hercules Condensing 26 3 ErP Operating instructions

HERCULES
CONDENSING
26 3 - 32 3 ERP
Instruction and
recommendation booklet IE
*1.037970ENG*

e manufacturer declines all liability due to printing or transcription errors, reserving the right to make any modications to its technical and commercial
documents without forewarning.
Dear Customer,
Our compliments for having chosen a top-quality Immergas product, able to assure well-being and safety for a long period of time. As an Immergas customer
you can also count on a qualied aer-sales service, prepared and updated to guarantee constant eciency of your boiler. Read the following pages carefully: you
will be able to draw useful suggestions regarding the correct use of the appliance, the respect of which, will conrm your satisfaction for the Immergas product..
For assistance and scheduled maintenance contact Authorised Aer-Sales centres: they have original spare parts and are specically trained directly by the
manufacturer.
General recommendations
All Immergas products are protected with suitable transport packaging.
e material must be stored in dry environments protected against 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 instructions manual provides technical information for installing Immergas boilers. As for the other issues related to boiler installation (e.g. safety in the work
place, environment protection, injury prevention), it is necessary to comply with the provisions of the regulations in force and principles of good workmanship.
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 the Immergas appliance and/or components, accessories, kit and devices can cause unexpected problems to people, animals
and objects. Read the instructions provided with the product carefully to ensure a proper installation.
Maintenance must be carried out by skilled technical sta. e Authorised Aer-sales Service represents a guarantee of qualications and professionalism.
e appliance must only be destined for the use for which it has been expressly declared. Any other use will be considered improper and therefore potentially
dangerous.
If errors occur during installation, operation and maintenance, due to non compliance with technical laws in force, standards or instructions contained in this
book (or however supplied by the manufacturer), the manufacturer is excluded from any contractual and extra-contractual liability for any damages and the
appliance warranty is invalidated.
e company IMMERGAS S.p.A., with registered oce in via Cisa Ligure 95 42041 Brescello (RE), declares that the design, manufacturing and aer-sales
assistance processes comply with the requirements of standard UNI EN ISO 9001:2015.
For further details on the product CE marking, request a copy of the Declaration of Conformity from the manufacturer, specifying the appliance model
and the language of the country.

INDEX
USER pageINSTALLER page MAINTENANCE TECHNICIAN page
1 Boiler installation .......................................5
1.1 Installation recommendations..................5
1.2 Main dimensions. ......................................6
1.3 Gas connection. ..........................................7
1.4 Hydraulic connection.................................7
1.5 Electrical connection. ................................7
1.6 Remote controls and room chrono-
thermostats (Optional). .............................8
1.7 External temperature
probe (Optional).........................................8
1.8 Immergas ue systems..............................9
1.9 Tables of resistance factors
and equivalent lengths. ..............................9
1.10 Installation of boiler type B with open
chamber and fan assisted (optional). .....11
1.11Concentric horizontal kit installation....12
1.12Concentric vertical kit installation.........13
1.13Separator kit installation..........................14
1.14Adaptor C9 kit installation. ....................15
1.15Ducting of ues or technical slots. .........16
1.16 Conguration type B, open chamber
and fan assisted for indoors.....................16
1.17Flue exhaust to ue/chimney. .................16
1.18Flues, chimneys, chimney
pots and terminals....................................17
1.19System lling. ............................................17
1.20Condensate trap lling.............................17
1.21Gas system start-up. .................................17
1.22Boiler start up (ignition)..........................17
1.23Circulation pump......................................18
1.24Domestic hot water storage tank unit....19
1.25Kits available on request. .........................19
1.26Boiler components....................................20
2 Use and maintenance instructions.........21
2.1 Cleaning and maintenance......................21
2.2 General warnings......................................21
2.3 Control panel.............................................21
2.4 Description of functioning states ..........22
2.5 Using the boiler. ........................................23
2.6 Troubleshooting........................................24
2.7 Boiler shutdown........................................25
2.8 Restore central heating
system pressure. ........................................25
2.9 System draining. ......................................25
2.10Cylinder draining. ....................................25
2.11Antifreeze protection. ..............................25
2.12Case cleaning.............................................26
2.13Decommissioning.....................................26
2.14Parameters and information menu. .......26
3 Boiler commissioning
(initial check) ............................................28
3.1 Plumbing diagram....................................28
3.2 Wiring diagram.........................................29
3.3 Troubleshooting........................................30
3.4 Converting the boiler
to other types of gas..................................31
3.5 Calibration of number of fan revs. .........31
3.6 Adjustment of the air-gas ratio. ..............31
3.7 Checks following conversion
to another type of gas...............................31
3.8 Programming the P.C.B. ..........................32
3.9 “Chimney sweep function”......................34
3.10Pump anti-block function. ......................34
3.11three-way anti-block function. ...............34
3.12Radiators antifreeze function..................34
3.13P.C.B. periodic self-check. .......................34
3.14Automatic vent function..........................34
3.15Solar panels coupling function. ..............34
3.16Yearly appliance check
and maintenance.......................................35
3.17Casing removal. ........................................36
3.18Variable heat output. ................................38
3.19Combustion parameters. .........................39
3.20Technical data. ..........................................40
3.21Key for Data nameplate. ..........................41
3.22Technical parameters for mixed
boilers (in compliance with
Regulation 813/2013)...............................42
3.23Product data sheet (in compliance
with Regulation 811/2013)......................43
3.24Parameters for lling in
the assembly sheet. ...................................44

5
INSTALLERUSER
MAINTENANCE TECHNICIAN
1BOILER INSTALLATION
1.1 INSTALLATION
RECOMMENDATIONS.
e Hercules Condensing ErP boiler has been
designed for wall mounted installation only; for
heating and production of domestic hot water for
household use and similar purposes.
In the event the unit is installed in damp places,
one must provide an insulation system under-
neath it, to insulate it from the ground.
e place of installation of the appliance and
relative Immergas accessories must have suitable
features (technical and structural) such to allow
(always in safety, efficiency and comfortable
conditions):
- installation (according to the provisions of the
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 compo-
nents) as well as their eventual replacement
with appliances and/or equivalent components.
By varying the type of installation the classica-
tion of the boiler also varies, precisely:
- Type B23 or B53 boiler if installed using the rel-
evant 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
sealed chamber boilers for air intake and expul-
sion of ue gas.
Note: appliance classication is provided in the
depictions of the various installation solutions
shown on the following pages.
Only professionally enabled companies are
authorised to install Immergas gas appliances.
Installation must be carried out according to
regulation standards, current legislation and in
compliance with local technical regulations and
the required technical procedures.
Attention: the manufacturer declines all liability
for damages caused by boilers removed from
other systems or for any non-conformities of
such equipment.
Before installing the appliance, ensure that it is
delivered in perfect condition; if in doubt, contact
the supplier immediately. Packing materials (sta-
ples, nails, plastic bags, polystyrene foam, etc.)
constitute a hazard and must be kept out of the
reach of children. If the appliance is installed in-
side or between cabinets, ensure sucient space
for normal servicing; therefore it is advisable to
leave clearance of at least 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 ue connections. Keep all ammable
objects away from the appliance (paper, rags,
plastic, polystyrene, etc.).
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 regulations:
- Installation of gas appliances, ue exhaust
pipes and combustion air intake pipes is
forbidden in places with a re risk (for ex-
ample: garages, closed parking stalls), and
in potentially dangerous places.
- Installation is forbidden in places/rooms that
constitute public areas of apartment build-
ings, 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, at-
tics, los, etc., unless otherwise provided for
by local regulations in force.
Attention: these 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 must be
installed in rooms where the temperature can-
not fall below 0°C and must not be exposed to
atmospheric agents.
"Anti-legionella" heat treatment of the Immergas
storage tank (activated by the specic function
present on the predisposed thermoregulatory
systems): during this stage, the temperature of
the water inside the storage tank exceeds 60°C
with a relative risk of burns. Keep this domestic
water treatment under control (and inform
the users) to prevent unforeseeable damage
to people, animals, things. If required install a
thermostatic valve on the domestic hot water
outlet to prevent scalding.

1-1
6
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.2 MAIN DIMENSIONS.
Key:
RZ3 - Zone 3 high temperature system return G 3/4” (optional)
MZ3 - Zone 3 high temperature system ow G 3/4” (optional)
RZ2 - Zone 2 high temperature system return G 3/4” (optional)
MZ2 - Zone 2 high temperature system ow G 3/4” (optional)
RZ2 - Zone 2 low temperature system return G 1” (optional)
MZ2 - Zone 2 low temperature system ow G 1” (optional)
RZ1 - Zone 1 low temperature system return G 1” (optional)
MZ1 - Zone 1 low temperature system ow G 1” (optional)
RZ1 - Zone 1 high temperature system return G 3/4”
MZ1 - Zone 1 high temperature system ow G 3/4”
G - Gas supply G 1/2”
AC - DHW output G 3/4”
AF - DHW inlet G 3/4”
RC - Recirculation G 3/4” (optional)
RP - Return to solar panels G 3/4” (optional)
MP - Flow from solar panels G 3/4” (optional)
SC - Condensate drain (minimum internal diameter Ø 13 mm)

CAVO ALIMENTAZIONE
1-2
7
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.3 GAS CONNECTION.
Our boilers are designed to operate with methane
gas (G20) and LPG. Supply pipes must be the
same as or larger than the 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 name plate). If
dierent, the appliance must be converted for op-
eration 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 comply with the technical standards
in force, as insucient levels can reduce gen-
erator output and cause malfunctions. Ensure
correct gas cock connection. The gas supply
pipe must be suitably dimensioned according to
current regulations in order to guarantee correct
gas ow rate to the burner even in conditions of
maximum generator output and to guarantee
appliance eciency (technical specications).
e coupling system must conform to technical
standards in force.
Fuel gas quality. e appliance was designed
to operate with combustible gas free of impuri-
ties; otherwise it is advisable to t special lters
upstream of the appliance to restore the purity
of the fuel.
Storage tanks (in case of supply from LPG
depot).
- New LPG storage tanks may contain residual
inert gases (nitrogen) that degrade the mixture
delivered to the appliance casing functioning
anomalies.
- Due to the composition of the LPG mixture,
layering of the mixture components may occur
during the period of storage in the tanks. is
can cause a variation in the heating power of
the mixture delivered to the appliance, with
subsequent change in its performance.
1.4 HYDRAULIC CONNECTION.
Attention: in order not to void the condensa-
tion module warranty, before making the boiler
connections, carefully wash the heating system
(pipes, radiators, etc.) with special pickling or
descaling products to remove any deposits that
could compromise correct boiler operation.
A treatment of the heating and water system wa-
ter is required, in compliance with the technical
standards in force, in order to protect the system
and the appliance from deposits (e.g. scale),
slurry or other hazardous deposits.
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 manufactur-
er 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.
In order to meet the system requirements es-
tablished by the technical regulation in force in
relation to the pollution of drinking water, we
recommend installing the IMMERGAS anti-
backow kit to be used upstream of the cold
water inlet connection of the boiler. It is also
recommended that the heat transfer uid (e.g.
water + glycol) entered in the primary circuit
of the boiler (heating circuit), complies with the
local regulations in force.
Attention: to preserve the duration and the ef-
ciency features of the appliance, in the presence
of water whose features can lead to the deposit of
scale, installation of the “polyphosphate dispenser”
kit is recommended.
Condensate drain. To drain the condensate
produced by the appliance, it is necessary to
connect to the drainage system by means of acid
condensate resistant pipes, with an internal Ø of
at least 13 mm. e system connecting the appli-
ance to the drainage system must be carried out
in such a way as to prevent freezing of the liquid
contained in it. Before appliance ignition, ensure
that the condensate can be correctly removed.
Aer rst ignition, check that the drain trap is
lled with condensate (para. 1.20). Also, comply
with national and local regulations on discharg-
ing waste waters.
In the event condensate is not discharged into
the wastewater drainage system, a condensate
neutraliser must be installed to ensure compli-
ance with the parameters established by the
legislation in force.
1.5 ELECTRICAL CONNECTION.
e 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 cur-
rent safety standards.
Attention: the manufacturer declines any
responsibility for damage or physical injury
caused by failure to connect the boiler to an
ecient earth system or failure to comply with
the reference standards.
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 the earth connection on
this network must also feature a multi-pole
circuit breaker of class III overvoltage category.
When replacing the power supply cable, contact
a qualied rm (e.g. the Authorised Aer-Sales
Technical Assistance Service).
e power cable must be laid as shown (Fig. 1-2).
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 adapt-
ers, multiple sockets or extension leads.
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 delivery tempera-
ture adjustment range “P66/A” and “P66/B”. In
this situation 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 temperature 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.
SUPPLY VOLTAGE CABLE

1-5 1-6
1-3 1-4
45
31
58
8
INSTALLERUSER
MAINTENANCE TECHNICIAN
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 chrono-thermostat is fed
directly by the boiler by means of the same 2
wires used for transmitting data between boiler
and device.
Important: if the system is subdivided into areas
using the relevant kit, the CAR V2 and the Super
CAR must be used with its climate thermostat
function disabled, i.e. it must be set to On/O
mode.
CAR V2, Super CAR or On/O chrono-ther-
mostat electrical connection (Optional). e
operations described below must be performed
aer having removed the voltage from the appli-
ance. 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 CAR V2 or Super
CAR must be connected by means of terminals
IN+ and IN- to terminals 42 and 43 on the
P.C.B. (in the 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. No boiler pipes
must ever be used to earth the electric system or
telephone lines. Ensure elimination of this risk
before making the boiler electrical connections.
TM-MAX/MIN = Selected ow
temp. range.
TE = External temperature.
EXTERNAL PROBE
Correction law of the ow temperature depending on the external tem-
perature and user adjustments of the central heating temperature.
1.7 EXTERNAL TEMPERATURE PROBE
OPTIONAL.
e boiler is designed for the application of the
Room ermostat (Fig. 1-5) which is available
as an optional kit. Refer to the relative instruc-
tion sheet to position the external probe. e
probe can be connected directly to the boiler
electrical system and allows the max. system
ow temperature to be automatically decreased
when the external temperature increases, in
order to adjust the heat supplied to the system
according to the change in external tempera-
ture. e external probe always operates when
connected, regardless of the presence or type of
room chrono-thermostat used and can work in
combination with Immergas timer thermostats.
e correlation between system ow temperature
and external temperature is determined by the
parameters set in menu “M5” under item “P66”
according to the curves represented in the dia-
gram (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).
1.6 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. 1-3 and 1-4).
All Immergas chrono-thermostats are connected
with 2 wires only. Carefully read the user and
assembly instructions contained in the acces-
sory kit.
• On/O digital Immergas chrono-thermostat.
e chrono-thermostat allows:
- set two room temperature value: one for
daytime (comfort temperature) and one for
night-time (reduced temperature);
- set a weekly program with four daily switch
on and switch o times;
- select the required operating mode from the
various possible alternatives:
- manual mode (with adjustable tempera-
ture).
- automatic mode (with set program).
- forced automatic mode (momentarily
changing the temperature of the automatic
program).
e chrono-thermostat is powered by two 1.5V
LR 6 type alkaline batteries.
• ere are two types of remote controls avail-
able: Comando Amico Remoto remote con-
trolV2 (CARV2) and Super Comando Amico
Remoto remote control (Super CAR) both
with a climate chrono-thermostat operation.
In addition to the functions described in the
previous point, the chrono-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.

(A)
(B)
1-7
9
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 80/125
Concentric pipe Ø 80/125 m 1 2.1 1
Concentric bend 90° Ø 80/125 3.0 1.4
Concentric bend 45° Ø 80/125 2.1 1
Terminal complete with concentric
horizontal intake-exhaust Ø 80/125 2.8 1.3
Terminal complete with concentric
vertical intake-exhaust Ø 80/125 3.6 1.7
Concentric bend 90° Ø 80/125 with
inspection 3.4 1.6
Stub pipe with inspection Ø 80/125 3.4 1.6
1.8 IMMERGAS FLUE SYSTEMS.
Immergas supplies various solutions separately
from the boilers regarding the installation of
air intake terminals and ue exhaust, which are
fundamental for boiler operation.
Attention: the boiler must be installed ex-
clusively with an original Immergas “Green
Range” inspectionable air intake system and
fumes extraction system made of plastic, with
the exception of the C6 conguration, as re-
quired by the regulations in force.
e plastic pipes cannot be installed outdoors,
for tracts longer than 40 cm, without suitable
protection from UV rays and other atmos-
pheric agents.
is system can be identied by an identica-
tion 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 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.
• Positioning the gaskets (black) for “green
range” ue systems. Position the gasket cor-
rectly (for bends and extensions) (Fig. 1-7):
- gasket (A) with notches, to use for bends;
- gasket (B) without notches, to use for exten-
sions;
N.B.: if component lubrication (already car-
ried out by the manufacturer) is not sucient,
remove the residual lubricant using a dry cloth,
then to ease tting coat the parts with talc, sup-
plied in the kit.
• 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
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.
• N.B.: for safety purposes, do not obstruct the
boiler intake/exhaust terminal, even temporar-
ily.
• N.B.: when installing horizontal pipes, a mini-
mum inclination of 3% must be maintained and
a section clip with pin must be installed every
3 metres.

10
INSTALLERUSER
MAINTENANCE TECHNICIAN
TYPE OF DUCT
Resistance
Factor
(R)
Equivalent length
in m of concentric
pipe Ø 60/100
Equivalent
length in metres
of pipe Ø 80
Equivalent length
in metres of pipe
Ø 60
Equivalent length
in m of concentric
pipe Ø 80/125
Concentric pipe Ø 60/100
m 1
Intake and
Exhaust 6.4 m 1 Intake m 7.3 Exhaust m 1.9 m 3.0
Exhaust m 5.3
Concentric bend 90° Ø
60/100
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° Ø
60/100
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 Ø 60/100
Intake and
Exhaust 15 m 2.3
Intake m 17.2
Exhaust m 4.5 m 7.1
Exhaust m 12.5
Concentric horizontal
intake- exhaust terminal
Ø 60/100
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 Ø 60/100
Intake and
Exhaust 16.3 m 2.5
Intake m 18.7
Exhaust m 4.9 m 7.7
Exhaust m 13.6
Concentric vertical intake-
exhaust terminal Ø 60/100
Intake and
Exhaust 9 m 1.4
Intake m 10.3
Exhaust m 2.7 m 4.3
Exhaust m 7.5
Pipe Ø 80 m 1 Intake 0.87 m 0.1 Intake m 1.0 Exhaust m 0.4 m 0.4
m 0.5
Exhaust 1.2 m 0.2 Exhaust m 1.0
Complete intake terminal
Ø 80 m 1 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° Ø 80 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° Ø 80 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° Ø 60 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 Ø 60 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
11
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.10 INSTALLATION OF BOILER TYPE B
WITH OPEN CHAMBER AND FAN
ASSISTED OPTIONAL.
In this conguration the relevant terminal must
be used (present in the intake kit for the installa-
tion 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 chimney or to the out-
side. e boiler in this conguration, following
the assembly instructions stated on the relative
instruction sheet, is classied as type B23 or B53
(according to the applicable regulations).
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 gas exhaust must be connected to its
own individual ue or ducted 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,
solvents, combustibles, etc.), as well as dusts
(e.g. dust deriving from the processing of
wood, coal dust, cement, etc.), which may be
harmful for the components of the appliance
and jeopardise operation;
- in B23 and B53 conguration, the boilers must
not be installed in bedrooms, bathrooms or in
studio ats;
- installation of appliances in B23 or B53 congura-
tion is recommended in non-residential prem-
ises and which are permanently ventilated.
e following technical regulations in force must
therefore be adhered to.
Max. length of exhaust duct. e ue pipe (both
vertical or horizontal) can be extended to a max.
length of 30 linear metres.

C13
1-10
1-9
C13
1-11
C13 C13
1-12
1
2
3
456
5
4
3
1
2
12
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.11 CONCENTRIC HORIZONTAL KIT
INSTALLATION.
Type C configuration, sealed chamber and
fan assisted.
e position of the terminal (in terms of dis-
tances from openings, overlooking buildings,
floor, etc.) must be in compliance with the
regulations in force.
is terminal is connected directly to the outside
of the building for air intake and ue exhaust. e
horizontal kit can be installed with the rear, right
side, le side or front outlet. For installation with
frontal outlet, one must use the xing plate and
a concentric bend coupling in order to ensure
sucient space to carry out the tests required
by law upon commissioning.
• External grid. Both the Ø 60/100 and Ø 80/125
intake/exhaust terminal, if properly installed, is
pleasant to look at on the outside of the build-
ing. Make sure that the external silicone wall
sealing plate is properly inserted in the wall.
N.B.: for proper system operation the terminal
with grid must be installed correctly ensuring
that, the "high" indication on the terminal is
observed during installation.
Horizontal intake-exhaust kit Ø 60/100 Kit
assembly (Fig. 1-9): install the bend with ange
(2) on the central hole of the boiler, positioning
gasket (1) with the circular projections down-
wards in contact with the boiler flange, and
tighten using the screws supplied with the kit. Fit
the Ø 60/100 (3) concentric terminal pipe with
the male side (smooth) to the female side of the
bend (2) up to the end stop; making sure that the
internal and external wall sealing plate have been
tted, this will ensure sealing and joining of the
elements making up the kit.
• Extensions for Ø 60/100 horizontal kit (Fig.
1-10). e kit with this conguration can be
extended up to a max. 12.9 horizontal m in-
cluding the terminal with grid and excluding
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.
Immergas also provides a Ø 60/100 simplied
terminal, which in combination with its exten-
sion kits allows you to reach a maximum exten-
sion of 11.9 metres.
Horizontal intake-exhaust kit Ø 80/125 Kit
assembly (Fig. 1-11): 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 supplied with
the kit. Engage the bend (3) with the male side
(smooth) to the end stop on the adapter (1). Fit
the Ø 80/125 (5) concentric terminal pipe with
the male side (smooth) to the female side of the
bend (4) (with lip seals) up to the end top; making
sure that the internal (6) and external wall sealing
plate (7) have been tted, this will ensure sealing
and joining of the elements making up the kit.
• Extensions for horizontal kit Ø 80/125 (Fig.
1-12). e kit with this conguration can be
extended up to a max. length of 32 m, includ-
ing the terminal with grid and excluding the
concentric bend leaving the boiler. If addi-
tional components are assembled, the length
equivalent to the maximum allowed must be
subtracted. In this case the special extensions
must be requested.
e adaptor kit includes:
N° 1 - Gasket (1)
N° 1 - Adaptor Ø 80/125 (2)
e Kit Ø 80/125 includes:
N° 1 - Concentric bend Ø 80/125 a 87° (3)
N° 1 - Int./exhaust concentric terminal Ø
80/125 (4)
N° 1 - Internal wall sealing plate (5)
N° 1 - External wall sealing plate (6)
e remaining kit components must not
be used
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)
Max 12900 mm
Max 32000 mm
Max 31956 mm
Max 12790 mm

C33
C33
C33
C33
1-14
1-16
1-15
1
2
3
4
5
6
7
1-13
7
46
5
1
2
3
13
INSTALLERUSER
MAINTENANCE TECHNICIAN
e adaptor kit includes:
N° 1 - Gasket (1)
N° 1 - Adaptor Ø 80/125 (2)
e Kit Ø 80/125 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 Ø 80/125 (7)
e remaining kit components
must not be used
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 Ø
60/100 (5)
N° 1 - Fixed half-shell (6)
N° 1 - Mobile half-shell (7)
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
exhaust.
N.B.: the vertical kit with aluminium tile enables
installation on terraces and roofs with a maxi-
mum slope of 45% (approx 25°) and the height
between the terminal cap and half-shell (374 mm
for Ø 60/100 and 260 mm for Ø 80/125) must
always be observed.
Vertical kit with aluminium tile Ø 60/100.
Kit assembly (Fig. 1-13): install the concentric
ange (2) on the central hole of the boiler, posi-
tioning gasket (1) with the circular projections
downwards in contact with the boiler ange, and
tighten using the screws supplied with 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 (6) on the aluminium tile and in-
sert 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.
Note: when the boiler is installed in areas where
very rigid temperatures can be reached, a special
anti-freeze kit is available that can be installed as
an alternative to the standard kit.
• Extensions for vertical kit Ø 60/100 (Fig. 1-14).
e kit with this conguration can be extended
to a max. straight vertical length of 14.4 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. 1-15): 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 supplied
with 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
tile and insert the intake-exhaust pipe (7). Fit the
80/125 Ø concentric terminal pipe with the male
end (6) (smooth) to the female end of the adapter
(1) (with lip gasket) up to the 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. 1-16).
e kit with this conguration can be extended
up to a max. length of 32 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.
Max 45%
Max 14400 mm
Max 45%
Max 32000 mm

C83
1-19
C43 C53* - C83 1-181-17
1
4
79
556
7
8
3
2
S
A
14
INSTALLERUSER
MAINTENANCE TECHNICIAN
e kit includes:
N° 1 - Exhaust gasket (1)
N° 1 - Flange seal gasket (2)
N° 1 - Female intake ange (3)
N° 1 - Female drain ange (4)
N° 2 - Bend 90° Ø 80 (5)
N° 1 - Intake terminal Ø 80 (6)
N° 2 - Internal wall sealing plates (7)
N° 1 - External wall sealing plate (8)
N° 1 - Drain pipe Ø 80 (9)
1.13 SEPARATOR KIT INSTALLATION.
Type C configuration, sealed chamber and
fan assisted.
Separator kit Ø 80/80. is 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)
(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 ange (4) 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 hex screws with at tip supplied with 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 side (smooth) to
the bends (5) in the female side of the anges (3
and 4). Fit the intake terminal (6) with the male
side (smooth) in the female side of the bend (5)
up to the end stop, ensuring that the internal
and external wall sealing plates are tted. Fit the
exhaust pipe (9) with the male side (smooth)
to the female side of the bend (5) up to the end
stop; making sure that the internal wall sealing
plate has been tted, this will ensure sealing and
joining of the elements making up the kit.
• Installation clearances (Fig. 1-18). e mini-
mum installation clearance measurements of
the Ø 80/80 separator terminal kit have been
stated in some limit conditions.
• Extensions for separator kit Ø 80/80. The
maximum vertical straight length (without
bends) that can be used for Ø 80 intake and
exhaust pipes is 41 metres, regardless from
whether they are used for intake or exhaust.
e maximum horizontal straight length (with
bend in suction and in exhaust) that can be
used for Ø 80 intake and exhaust pipes is 36
metres, regardless from whether they are used
for intake or exhaust. Please note the type of
installation C43 must be done with a natural
draught ue.
N.B.: to favour the removal of possible conden-
sate forming in the exhaust pipe, tilt the pipes
towards the boiler with a minimum slope of
1.5% (Fig. 1-19).
* to er complete C53 conguration also provide for a roof discharge terminal.
e conguration on walls opposite the building is not allowed.
Minimum slope 1.5 %

12
3
3
3
4567
689
A
10
11
12
12
1-21
1-20
A
B
A
C
15
INSTALLERUSER
MAINTENANCE TECHNICIAN
Kit composition:
Ref. Qty Description
1 1 Door adaptor Ø 100 or Ø 125
2 1 Door gasket made of neoprene
3 4 Screws 4.2 x 9 AF
4 1 Hex headed screw M6 x 20
5 1 Flat nylon washer M6
6 2 Door hole closure metal-sheet plate
plug
7 1 Plug gasket made of neoprene
8 1 Toothed washer M6
9 1 Nut M6
10 1 (kit 80/125) Concentric gasket Ø 60-100
11 1 (kit 80/125) Flanged adapter Ø 80-125)
12 4 (kit 80/125) Hex headed screws M4 x 16 slotted
- 1 (kit 80/125) Bag of lubricating talc
Installation drawings key:
Unique identication of the component in
the kit
Identication of the component not supplied
in this kit
1
A
Supplied separately:
Ref. Qty Description
A 1 Ducting kit door
Rigid Ø 80
ducting (A)
mm
SHAFT
(B) mm
SHAFT
(C) mm
86 126 146
Flexible Ø 80
ducting (A)
mm
SHAFT
(B) mm
SHAFT
(C) mm
90 130 150
Rigid Ø 60
ducting (A)
mm
SHAFT
(B) mm
SHAFT
(C) mm
66 106 126
1.14 ADAPTOR C9 KIT INSTALLATION.
is kit allows an Immergas boiler to be installed
in "C93" conguration, with combustion air intake
directly from the sha where the ue gas exhaust
is, obtained by means of a ducting system.
System composition.
e system must be combined with the following
components (sold separately) to be functional
and complete:
- kit C93 Ø 100 or Ø125 version
- ducting kit Ø 60 or Ø 80
- fumes exhaust kit Ø 60/100 or Ø 80/125 con-
gured according to the installation and type
of boiler.
Kit Assembly.
- Mount the components of kit "C9" on the door
(A) of the ducting system (Fig. 1-21).
- (Version Ø 125 only) mount the anged adap-
tor (11) interposing the concentric gasket (10)
on the boiler, tting it with the screws (12).
- Mount the ducting system as described in the
relative instructions sheet.
- Calculate the distances between the boiler drain
and the bend of the ducting system.
- Prepare the boiler ue system, making sure that
the internal pipe of the concentric kit is tted
properly in the bend of the ducting system
(quota "X" g. 1-22), while the external pipe
must be tted on the adaptor until it stops (1).
N.B.: to encourage the removal of possible
condensate forming in the exhaust pipe, tilt
the pipes towards the boiler with a minimum
slope of 1.5%.
- Mount the cover (A) complete with adaptor (1)
and caps (6) on the wall and assemble the ue
system to the ducting system.
N.B.: (version Ø 125 only) before assembly
check the gaskets are in the right position. In
the event component lubrication (already car-
ried out by the manufacturer) is not sucient,
remove the residual lubricant using a dry cloth,
then to ease tting coat the parts with common
or industrial talc.
Once all components have been assembled prop-
erly, the exhaust fumes will be expelled via the
ducting system; the combustion air for normal
boiler operation will be aspirated directly by the
sha (Fig. 1-22).
Technical data.
- e dimensions of the shas must ensure a
minimum gap between the outer wall of the
smoke duct and the inner wall of the sha: 30
mm for circular section shas and 20 mm in
the event of a square section sha (Fig. 1-20).
- Maximum 2 changes of direction are allowed
on the vertical section of the ue system with
a maximum clearance angle of 30° with respect
to the vertical.
- e maximum vertical extension using a Ø 60
ducting system is 13 m, the maximum exten-
sion includes 1 bend Ø 60/10 at 90°, 1 m of
horizontal pipe 60/100, 1 90° ducted bend Ø
60 and the roof terminal for ducting.
To determine the C93 ue system in congura-
tions other than that described (Fig. 1-22)
one must consider that 1 metre of ducted pipe
according to the indications described has a
resistance factor equal to 4.9.
- e maximum vertical extension using a Ø 80
ducting system is 28 m, the maximum exten-
sion includes 1 adapter 60/100 to 80/125, 1 87°
bend Ø 80/125, 1 m of horizontal pipe 80/125,
1 90° ducted bend Ø 80 and the roof terminal
for ducting.
To determine the C93 ue system in congura-
tions other than that described (Fig. 1-22) one
must consider the following pressure drops:
- 1 m of concentric pipe Ø 80/125 = 1 m of
ducted pipe;
- 1 87° bend = 1.4 m of ducted pipe;
Consequently one must subtract the equivalent
length of the part added to the 28 m available.

1-23
C53
C93
X
1-22
16
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.15 DUCTING OF FLUES OR
TECHNICAL SLOTS.
Ducting is an operation through which, via
the introduction of one or more relevant pipes,
one achieves a system 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
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 in force.
Immergas ducting system. e Ø 60 rigid and Ø
80 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 environ-
mental conditions, according to current regula-
tions (absence of fumes, 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 per-
formed according to the indications supplied
by the manufacturer and in compliance with
the regulations in force.
- e maximum length specied by the manu-
facturer must be respected in this regard:
- e max. possible length of the Ø 60 exible
ducting vertical section is equal to 22 m. is
length is obtained considering the complete
Ø 80 exhaust terminal, 1m of Ø 80 pipe in
exhaust, two 90° Ø 80 bends at boiler outlet.
- e max. possible length of the Ø 80 ex-
ible ducting vertical section is equal to 30
m. is length is obtained considering the
complete exhaust terminal, 1m of Ø 80 pipe
in exhaust, two 90° Ø 80 bends at boiler outlet
for connecting to the ducting system and two
direction changes of the exible hose inside
the chimney/technical slot.
- e maximum possible length of the Ø 80
rigid ducting vertical section is equal to 30
m. is length is obtained considering the
complete Ø 80 exhaust terminal, 1m of Ø 80
pipe in exhaust, two 90° Ø 80 bends on the
boiler outlet.
1.16 CONFIGURATION TYPE B, OPEN
CHAMBER AND FAN ASSISTED FOR
INDOORS.
e appliance can be installed inside buildings
in B23 or B53 mode; in this case, 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 harm-
ful for the components of the appliance and
jeopardise operation.
- in B23 and B53 conguration the boilers must not
be installed in bedrooms, bathrooms or bedsits,
unless otherwise provided for by local regula-
tions in force. ey must neither be installed
in rooms containing solid fuel heat generators
nor in rooms communicating with said rooms.
- e installation of appliances in B23 and B53
congurations are only recommended in places
that are not lived in and which are permanently
ventilated.
For installation the suitable kit must be used,
referred to in paragraph 1.10.
1.17 FLUE EXHAUST TO FLUE/CHIMNEY.
e ue 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 chimney
or directly into the external atmosphere via a
suitable terminal, unless otherwise provided
for by local regulations in force. 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. The thermo-fluid 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
technical standards in force, by a professionally
qualied company. Chimney or ue sections for
connection of the exhaust pipe must comply with
requisites of technical standards in force.

17
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.18 FLUES, CHIMNEYS, CHIMNEY
POTS AND TERMINALS.
e ues, chimneys and chimney pots 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, court-
yards 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.
1.19 SYSTEM FILLING.
Once the boiler is connected, proceed with sys-
tem lling via the lling cock (Fig. 2-8). Filling
is performed at low speed to ensure release of air
bubbles in the water via the boiler and central
heating system vents.
e pump may be noisy on start-up due to the
presence of air. is noise should stop aer a
few minutes of functioning and however aer
having correctly bled the air contained in the
hydraulic circuit.
e boiler incorporates an automatic vent valve
positioned on the boiler pump and one posi-
tioned on the hydraulic manifold. Make sure
that the hoods are loosened. Open the radiator
vent valves.
Close radiator vent valves when only water
escapes from them.
Close the lling cock when the boiler pressure
gauge indicates approx. 1.2 bar.
N.B.: during these operations, turn on the circu-
lating pump at intervals using the main switch
on the control panel. Vent the circulation pump
by loosening the front cap and keeping the motor
running and assuring that the liquid that escapes
cannot cause injury/damage to persons/objects.
Tighten the cap aer the operation.
Attention: to carry out the lling procedure
correctly, activate the "automatic vent" function,
see paragraph 3.14.
1.20 CONDENSATE TRAP FILLING.
On rst lighting of the boiler combustion prod-
ucts 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.
1.21 GAS SYSTEM STARTUP.
To start up the system, refer to the technical
standard in force.
In particular, for new gas systems:
- open windows and doors;
- avoid presence of sparks or open ames;
- bleed all air from the pipelines;
- check that the internal system is properly sealed
according to the specications set forth by
technical regulations in force.
1.22 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 specications set forth by
technical regulations in force;
- make sure 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 check 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 intervenes in the
event of gas supply failure and check the relative
intervention time;
- check the intervention of the main switch
located upstream from the boiler and in the
boiler;
- 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.

1-24A
1-24B
AB
C
D
E
F
G
H
18
INSTALLERUSER
MAINTENANCE TECHNICIAN
pipe installations. Any noise of the water ow
in the pipes, valves and radiators is eliminated
by reducing the head. Optimal conditions for
thermal comfort and acoustic well-being.
Programs C (3 lower 4 upper ) (P-C) -
Constant curve (orange LED). e circulator
pump maintains the pressure level (head)
constant as the system heat demand decreases
(ow rate reduction). With these settings, the
circulator 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.
Real time diagnostics: a lit LED (in various
colours) provides information regarding the
pump operating status, see g. 1-25
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
switches o).
- Close the system ow and return and let the
pump cool down.
- Empty the system circuit via the relative cock.
- Remove the motor and clean the impeller.
- Once unblocked, remount the motor.
- Fill the primary circuit; restore boiler power
and set the desired curve.
Attention: there is a burns hazard due to high
uid temperature and pressure. Burns hazard
from coming in contact.
1.23 CIRCULATION PUMP.
Boilers in the “Hercules Condensing ErP” series
are supplied with 2 types of circulating pumps.
Set operation modes according to one's installa-
tion requirements.
• Boiler circulator pump. e circulating pump
is not equipped with speed selector. To change
operation mode, parameter “P57” in the “M5”
boiler menu must be changed.
• Zone 1 circulator pump. e pump is ideal for
the requirements of each central heating system
in a domestic and residential environment.
In fact, the pump is equipped with electronic
control that allows to set advanced functions.
Adjustments. Turn the selector and set it on
the desired curve to adjust the circulator pump.
Program LED
P 1 lower (ΔP-V)
P 2 upper (ΔP-V) green
C 3 lower (ΔP-C) - H=3 m
C 4 upper (ΔP-C) - H=4 m orange
Min - Max blue
Program P (1 lower 2 upper ) (P-V) - Pro-
portional curve (green LED). This allows
the pressure level (head) to be proportionally
reduced as the system heat demand decreases
(flow rate reduction). Thanks to this func-
tion, the electric power consumption of the
circulator pump is reduced further: the energy
(power) used by the pump decreases according
to the pressure level and ow rate. With this
setting, the pump guarantees optimal perfor-
mance in most heating systems, thereby being
particularly suitable in single-pipe and two-
Key:
C = Head available to the system with circula-
tor pump selector in position C4 (standard
setting)
D = Head available to the system with circula-
tor pump selector in position C3
E = Head available to the system with circula-
tor pump selector in position P2
F = Circulator pump power with selector in
position C4 (standard setting)
G = Circulator pump power with selector in
position C3
H = Circulator pump power with selector in
position P2
Head available to the direct zone system xed speed.
Head available to the direct zone system proportional or constant speed.
Key:
A = Available head
B = Power absorbed by the circulator
pump (dotted area)
Circulator pump absorbed power (W)Circulator pump absorbed power (W)
Flow rate (l/h)
Flow rate (l/h)
Head (kPa)Head (kPa)
MAX
MIN

1-26
1-25
19
INSTALLERUSER
MAINTENANCE TECHNICIAN
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, ensure the lling
valve is closed. Close the cold water inlet valve
and open any domestic hot water cock. 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 cylinder
outwards on the relevant guides. Work in reverse
order to assemble the storage tank unit.
N.B.: have the eciency of the storage tank Mag-
nesium Anode checked annually by a qualied
rm. e storage tank unit is prepared for intro-
duction of the domestic hot water pump tting.
1.25 KITS AVAILABLE ON REQUEST.
• Recirculation kit (on request). The 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
inserted on the storage unit kit and the indica-
tion of the pump kit attachment is envisioned
on the installation template.
• System cut-off valves kit (on request). The
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 forma-
tion of lime-scale and preserves the original
heat exchange and domestic hot water pro-
duction 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 demand). If solar panels
are to be used for the production of domestic
hot water, Immergas supplies the solar panels
kit on demand.
• 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.
1.24 DOMESTIC HOT WATER STORAGE
TANK UNIT.
e “Hercules Condensing ErP” boiler is the
accumulation type with a capacity of 120 litres.
It contains large coiled stainless steel heat ex-
changer pipes, which allow to notably reduce
hot water production times. ese storage tank
units constructed with stainless steel casing and
bottoms, guarantee long duration through time.
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 hot water connections are placed
on the ange cover (cold inlet and hot outlet)
along with the Magnesium Anode support cap
including the same, supplied as standard for
internal protection of the storage tank unit from
possible corrosion.
Circulating pump
LED Description Diagnostics Remedy
LED steady on Pump
noisy
Insucient system pressure, circulating pump
in cavitation Restore correct thermal circuit pressure
Presence of foreign matter in the impeller Remove the motor and clean the impeller
Flashing white LED Noises during cir-
culation of the heat
transfer uid
Presence of air in the system Vent the system
LED steady on Flow rate too high Reduce rotation speed
LED o e circulator does
not work
Power outage Ensure the boiler is correctly powered, ensure
the circulator is correctly powered
Faulty circulating pump Replace the circulating pump
Red LED Rotor seized Remove the motor and clean the impeller
Insucient power supply voltage Check boiler power supply voltage
System draining valveStorage tank draining valve

1-27
20
INSTALLERUSER
MAINTENANCE TECHNICIAN
33 - Zones management electrical connec-
tion box (optional)
34 - Hydraulic manifold
35 - System expansion vessel
36 - Flow probe
37 - Safety thermostat
38 - Manifold draining valve
39 - System pressure switch (absolute)
40 - Boiler Circulator
41 - Sealed Chamber
42 - Gas valve
43 - Storage tank unit return one-way valve
44 - System draining valve
1.26 BOILER COMPONENTS.
Key
1 - Stainless steel storage tank unit
2 - DHW recirculation pump (optional)
3 - ree-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 - Flue probe
11 - Condensation module
12 - Burner
13 - Ignition electrode
14 - Detection electrode
15 - Venturi
16 - Gas nozzle
17 - Fan
18 - Cold water inlet cock
19 - 8 bar safety valve
20 - Air intake pipe
21 - 3 bar safety valve
22 - D.H.W. expansion vessel
23 - System lling valve
24 - Condensate drain trap
25 - Polyphosphate dispenser (optional)
26 - Domestic hot water probe
27 - Storage tank unit draining valve
28 - Sample points (air A) - (ue gas F)
29 - Positive signal pressure point
30 - Negative signal pressure point
31 - Manual air vent valve
32 - Vent valve