Immergas HERCULES SOLAR 26 2 ErP Operating instructions

HERCULES
SOLAR 26 2 ErP
Instruction and
recommendation booklet IE
*1.037974ENG*

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 prior notice.
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 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
site, environment protection, injury prevention), it is necessary to comply with the provisions specied in the regulations in force and principles of good practice.
In compliance with 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.
For further information regarding legislative and statutory provisions relative to the installation of gas heat generators, consult the Immergas site at the
following address: www.immergas.com
Mauro Guareschi
Research & Development Director
Signature:
CE DECLARATION OF CONFORMITY
(according to ISO/IEC 17050-1)
e company IMMERGAS S.p.A., with registered oce in via Cisa Ligure 95 42041 Brescello (RE) whose design, manufacturing, and aer sale assistance
processes comply with the requirements of standard UNI EN ISO 9001:2008,
DECLARES that:
e boiler model Hercules Solar 26 2 ErP complies with European Directives and Delegated European Regulations listed below:
“Eco-design” Directive 2009/125/EC, “Energy labelling” Directive 2010/30/EC, EU Regulation 811/2013, EU Regulation 813/2013, “Gas Appliance” Direc-
tive 2009/142/EC, “Electromagnetic Compatibility” Directive 2004/108/EC, “Performance” Directive 92/42/EC and “Low Voltage” Directive 2006/95/EC.

INDEX
USER page INSTALLER page MAINTENANCE TECHNICIAN page
1 Установка котла .......................................5
1.1 Указания по технике безопасности
при монтаже......................................................5
1.2 Основные размеры....................................6
1.3 Подключение к газовой магистрали
(Категория устройства II2H3B/P)...............7
1.4 Подключение к гидравлической
системе..........................................................7
1.5 Solar circuit hydraulic connection. ..........7
1.6 Electrical connection. ................................8
1.7 Remote controls and room chrono-
thermostats (Optional). .............................8
1.8 External temperature
probe (Optional). ........................................9
1.9 Immergas ue systems. ...........................10
1.10 Tables of resistance factors
and equivalent lengths. ............................10
1.11 Installation of boiler type B with open
chamber and fan assisted (optional). .....12
1.12 Concentric horizontal kit installation. ... 13
1.13 Concentric vertical kit installation. ........ 14
1.14 Separator kit installation. .........................15
1.15 Adaptor C9 kit installation. .................... 16
1.16 Ducting of ues or technical slots. .........17
1.17 Conguration type B, open chamber
and fan assisted for indoors. ....................17
1.18 Flue gas exhaust to ue/chimney. ........... 17
1.19 Flues, chimneys, chimney
pots and terminals. ...................................18
1.20 Central heating circuit lling. .................18
1.21 Condensate trap lling. ............................18
1.22 Gas system start-up. .................................18
1.23 Solar circuit start-up. ................................18
1.24 Solar circuit lling. ...................................18
1.25 Boiler start up (ignition). ......................... 19
1.26 DHW mixing valve. ..................................19
1.27 Circulation pump......................................19
1.28 Solar circuit circulation pump. ...............21
1.29 Main circulation unit components. ........ 22
1.30 Domestic hot water storage tank unit. ... 23
1.31 Kits available on request. .........................23
1.32 Boiler components. ...................................24
2 Use and maintenance instructions .........25
2.1 Cleaning and maintenance. ..................... 25
2.2 General warnings. .....................................25
2.3 Control panel.............................................25
2.4 Description of functioning states ..........26
2.5 Using the boiler. ........................................ 26
2.6 Troubleshooting. .......................................28
2.7 Parameters and information menu. .......30
2.8 Boiler shutdown. .......................................31
2.9 Restore central heating
system pressure. ........................................31
2.10 System drainage. ......................................31
2.11 Storage tank draining. .............................. 31
2.12 Anti-freeze protection. ............................. 31
2.13 Case cleaning. ............................................31
2.14 Decommissioning. .................................... 31
3 Boiler start-up (initial check) .................. 32
3.1 Hydraulic diagram. ...................................32
3.2 Wiring diagram. ........................................33
3.3 Troubleshooting. .......................................33
3.4 Converting the boiler
to other types of gas. .................................34
3.5 Calibration of number of fan revs. .........34
3.6 Adjustment of the air-gas ratio. ..............34
3.7 Checks following conversion
to another type of gas. .............................. 34
3.8 Programming the P.C.B. ............................ 35
3.9 "Chimney sweep function" ......................37
3.10 Pump anti-block function. ......................37
3.11 three-way anti-block function. ...............37
3.12 Radiators antifreeze function. ................37
3.13 Periodical P.C.B. self-check. ....................37
3.14 Automatic vent function. ......................... 37
3.15 Yearly appliance check
and maintenance. ...................................... 38
3.16 Casing removal. ........................................39
3.17 Variable heat output. ................................43
3.18 Combustion parameters. .........................43
3.19 Technical data. .......................................... 44
3.20 Key for Data nameplate. ..........................45
3.21 Technical parameters for mixed
boilers (in compliance
with Regulation 813/2013). .....................46
3.22 Product data sheet (in compliance
with Regulation 811/203). .......................46
3.23 Parameters for lling in the
assembly sheet. .......................................... 47

5
INSTALLERUSERMAINTENANCE TECHNICIAN
1 BOILER INSTALLATION
1.1 INSTALLATION
RECOMMENDATIONS.
e Hercules Solar 26 2 ErP boiler has been de-
signed uniquely for oor-installation, for heating
and production of DHW in domestic and similar
uses, with the possibility of coupling to a solar
panel system.
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
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
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.
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 40 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 in places with a re risk is pro-
hibited (for example: garages, closed parking
stalls), gas appliances 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 (for the features of the technical
compartments, see the technical standards 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 peo-
ple, animals, things.
N.B.: before starting the solar system, the solar
collector must be covered to protect the ab-
sorber from overheating and the operator from
scalding. e solar circuit must only be lled
when the hydraulic system has been completely
assembled and cannot be started before it has
been possible to eliminate the heat generated by
the solar collector.
Attention: to size the solar system, contact a
qualied heating engineer.

6
1-1
INSTALLERUSERMAINTENANCE TECHNICIAN
1.2 MAIN DIMENSIONS.
Key:
RP - Return to solar panels G 3/4”
MP - Flow from solar panels G 3/4”
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 inlet G 3/4”
RC - Recirculation G 3/4” (optional)
SC - Condensate drain (min. internal diameter Ø 13 mm)

7
INSTALLERUSERMAINTENANCE TECHNICIAN
1.3 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 1/2”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
name plate). If different, the appliance must
be converted for operation 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 accord-
ing to the type used in the boiler, which must
comply with the technical standards in force, as
insucient levels can reduce generator output
and cause malfunctions. Ensure correct gas cock
connection. e gas supply pipe must be suitably
dimensioned according to current regulations
in order to guarantee correct gas ow rate to the
burner even in conditions of maximum genera-
tor 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 BOILER 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 chemical treatment of the thermal 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., lime 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: Immergas declines all liability in the
event of damage caused by the inclusion of auto-
matic lling that is not its own brand.
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.
1.5 SOLAR CIRCUIT HYDRAULIC
CONNECTION.
Attention: when installing the solar circuit (pipes
and ttings), only use suitable materials that
withstand high temperatures.
e pump unit allows you to connect the storage
tank to the solar collector, making the water cir-
culate according to the request of the control unit.
N.B.: the pipes for connection to the solar col-
lector must be ordered separately.
- Every time the solar system is emptied, the
system must be rinsed well with running water.
- e circulation unit is not designed for use in
direct contact with swimming pool water.
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. 1.21). Also, comply
with national and local regulations on discharg-
ing waste waters.

8
1-2
CAVO ALIMENTAZIONE
CAVO SONDA SOLARE
CAVO COMANDO REMOTO
1-3
INSTALLERUSERMAINTENANCE TECHNICIAN
1.6 ELECTRICAL CONNECTION.
e “Hercules Solar 26 2 ErP” boiler has an
IPX5D protection rating for the entire appliance.
Electrical safety of the appliance is reached only
when it is correctly connected to an ecient
earthing system as specied by current safety
standards.
Attention: Immergas S.p.A. disclaims any li-
ability for damage or physical injury caused
by failure to connect the boiler to an ecient
earthing system or failure to comply with the
reference standards.
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. 1-3).
In the event of mains fuse replacement on the
P.C.B., use a 3.15A quick-blow fuse. For the main
power supply to the appliance, never use adapt-
ers, multiple sockets or extension leads.
Solar panels electrical connection. Only use an
appropriately sized cable to make the connec-
tions. Making them follow the same route as the
power supply cable (in the relevant pipe), make
the connections on the control panel on clamps
45 and 46, eliminating the resistance R15 (Fig.
1-2). Connect the supplied probe on the solar
panel and position it in the relevant seat.
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.
1.7 REMOTE CONTROLS AND ROOM
CHRONO-THERMOSTATS
(OPTIONAL).
The boiler is prepared for the application of
room chrono-thermostats or remote controls,
which are available as optional kits. All Immergas
chrono-thermostats are connected with 2 wires
only. Carefully read the user and assembly in-
structions contained in the accessory kit.
• On/O digital Immergas chrono-thermostat
(Fig. 1-3). 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 temperature).
- 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 availa-
ble: Comando Amico Remoto remote controlV2
(CARV2) (Fig. 1-4) and Super Comando Amico
Remoto remote control (Super CAR) (Fig. 1-5)
both with a climate chrono-thermostat opera-
tion. In addition to the functions described in
the previous point, the chrono-thermostat
panels enable the user to control all the im-
portant information regarding operation of
the appliance 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 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.
REMOTE CONTROL CABLE
SOLAR PROBE CABLE
POWER SUPPLY CABLE
Relay (Optional)
DIM (Op-
tional) Super CAR (Optional)

9
1-6 1-7
45
31
58
1-4 1-5
INSTALLERUSERMAINTENANCE TECHNICIAN
1.8 EXTERNAL TEMPERATURE PROBE
(OPTIONAL).
e boiler is designed for the application of the
external temperature probe (Fig. 1-6), which is
available as an optional kit. Refer to the relative
instruction 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. 1-7). 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.
EXTERNAL PROBE
Correction law of the ow temperature depending on the external tem-
perature and user adjustment of the central heating temperature.
Comando Amico Remoto remote control V2 (CARV2)
On/O digital chrono-thermostat.
Super Comando Amico Remoto remote control
(Super CAR)

10
(A)
(B)
1-8
INSTALLERUSERMAINTENANCE TECHNICIAN
1.10 TABLES OF RESISTANCE FACTORS
AND EQUIVALENT LENGTHS.
1.9 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 device and
fumes extraction system made of plastic, as
required 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. 1-8):
- 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.
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

11
INSTALLERUSERMAINTENANCE 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

12
X4
1-9
INSTALLERUSERMAINTENANCE TECHNICIAN
1.11 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.
The technical regulations in force must be
respected.
Max. length of exhaust duct. e ue pipe (both
vertical or horizontal) can be extended to a max.
length of 30 linear metres.

13
C13
1-111-10
C13
1-12
C13 C13
1-13
1
2
3
456
5
4
3
1
2
INSTALLERUSERMAINTENANCE TECHNICIAN
1.12 CONCENTRIC HORIZONTAL KIT
INSTALLATION.
Type C configuration, sealed chamber and
fan assisted.
e installation of this terminal is governed by
the applicable technical standards and subse-
quent amendments, that enables wall ue exhaust
for condensing boilers with low NOx in the cases
provided. e position of the terminal (in terms
of distances from openings, overlooking build-
ings, oor, etc.) must be in compliance with the
regulations in force.
is terminal is connected directly to the outside
of the building for air intake and ue exhaust. e
horizontal kit can be installed with the rear, right
side, le side or front outlet. For installation with
frontal outlet, one must use the xing plate and
a concentric bend coupling in order to ensure
sucient space to carry out the tests required
by law upon commissioning.
• External grid. Both the Ø 60/100 and Ø 80/125
intake/exhaust terminal, if 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. 1-10): 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.
1-11). 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. 1-12): 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.
1-13). 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

14
C33
C33
C33
C33
1-15
1-17
1-16
1
2
3
4
5
6
7
1-14
7
46
5
1
2
3
INSTALLERUSERMAINTENANCE 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)
1.13 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 out-
side 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. 1-14): 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. 1-15).
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. 1-16): 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
Ø 80/125 concentric terminal pipe with the male
side (smooth) to the female side of the adapter (1)
(with lip gaskets) up to the end stop; making sure
that the wall sealing plate (3) has been tted, this
will ensure sealing and joining of the elements
making up the kit.
• Extensions for vertical kit Ø 80/125 (Fig. 1-17).
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 32000 mm

15
C83
1-20
C43
1-19
1-18
1
4
79
556
7
8
3
2
S
A
C53* - C83
INSTALLERUSERMAINTENANCE TECHNICIAN
1.14 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 fumes to exit
from the chimney or ue through divided ue
exhaust and air intake pipes. Combustion prod-
ucts 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. 1-18): 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. 1-19). 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.
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. 1-20).
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)
* to er complete C53 conguration also provide for a roof discharge termi-
nal.
Minimum slope 1.5 %

16
12
3
3
3
4567
689
A
10
11
12
12
1-22
1-21
A
B
A
C
INSTALLERUSERMAINTENANCE TECHNICIAN
1.15 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. 1-22).
- (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. 1-23), 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. 1-23).
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. 1-21).
- 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gu-
rations other than that described (Fig. 1-23)
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. 1-23) 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.
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

17
X
C93
1-23 1-24
C53
INSTALLERUSERMAINTENANCE TECHNICIAN
1.16 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. 1-24). 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 provisions in force.
- 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 exible
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 connect-
ing 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 ex-
haust, two 90° Ø 80 bends on the boiler outlet.
1.17 CONFIGURATION TYPE B, OPEN
CHAMBER AND FAN ASSISTED FOR
INDOORS.
e appliance can be installed inside buildings
in 23 or B53 mode; in this case, all technical rules
and national and local regulations in force, must
be complied with.
For installation the suitable kit must be used,
referred to in paragraph 1.11.
1.18 FLUE GAS 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
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 at-
tached. Multiple and combined ues must be
specially designed according to the calculation
method and requirements of the standards in
force, by professionally qualied technical sta.
Chimney or ue sections for connection of the
ue exhaust pipe must comply with requisites of
technical standards in force.

18
INSTALLERUSERMAINTENANCE TECHNICIAN
1.19 FLUES, CHIMNEYS, CHIMNEY POTS
AND TERMINALS.
e ues, chimneys and chimney pots for the
evacuation of combustion products must be in
compliance with applicable technical standards.
Chimneys and roof-installed exhaust terminals
must comply 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.
1.20 CENTRAL HEATING CIRCUIT
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.
1.21 CONDENSATE TRAP FILLING.
On rst lighting of the boiler, ue gas may come
out the condensate drain; aer a few minutes’
operation check that this no longer occurs. is
means that the drain trap is lled with conden-
sate to the correct level preventing the passage
of ue gas.
1.22 GAS SYSTEM START-UP.
To start up the system, refer to the technical
standard in force: is 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 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.
1.23 SOLAR CIRCUIT START-UP.
Preliminary checks. Before lling the hydraulic
circuit and starting the system, carry out the
following checks:
- ensure that the declaration of conformity of
installation of the solar system is supplied with
the appliance;
- check the functionality of the safety devices,
particularly:
- safety valve (6 bar)
- expansion vessel
- thermostatic mixing valve
- make sure there are no leaks in the hydraulic
circuit;
- make sure there is an air vent valve positioned
in the highest point of the circuit above the
manifold and that it is operational.
If even only a single safety check oers a negative
result, do not commission the system.
Expansion vessel factory-set pressure of the
solar circuit hydraulic unit.
To compensate the high temperatures that
can be reached by the liquid in the circuit and
therefore its dilation, an expansion vessel has
been envisioned that has sucient capacity to
perform this task.
e expansion vessels are supplied pre-loaded
at 2.5 bar. It is therefore necessary to deate
them and reload them at the pressure required
for the circuit.
e expansion vessel must be charged to:
1.5 bar + 0.1 bar for every metre of the water
column.
“metre of the water column” means the vertical
distance that is present between the expansion
vessel and the solar manifold.
Example:
e circulation unit is found on the ground oor
and the solar manifold is found on the roof at a
hypothetical height of 6 m, the distance to be
calculated is:
6 m x 0.1 bar = 0.6 bar
therefore the expansion vessel must be charged
to:
1.5 + 0.6 = 2.1 bar
Hydraulic unit safety valve.
ere is a safety valve present on the hydraulic
unit that protects the system from an excessive
increase in pressure. is valve intervenes by
discharging the liquid contained in the circuit
when the pressure reaches 6 bar.
If the safety valve intervenes and therefore part of
the liquid contained in the circuit is lost, it must
be re-integrated.
1.24 SOLAR CIRCUIT FILLING.
N.B.: If errors occur during installation, opera-
tion and maintenance, due to non compliance
with the technical laws in force, standards or in-
structions contained in this manual (or however
supplied by the manufacturer), the manufacturer
accepts no contractual and extra-contractual
liability for any damages and the appliance war-
ranty is invalidated.
e system can only be lled when:
- any operational residues have been eliminated
that may cause obstructions and deteriorate the
features of the glycol over time;
- any presence of water in the system has been
eliminated, which could otherwise cause dam-
age to the system in winter;
- the absence of leaks has been veried by checks
using air;
- the storage tank unit has been lled;
- the expansion vessel has been charged accord-
ing to system requirements.
e system must be lled only using the glycol
supplied by Immergas via an automatic pump.
e system must be lled with vent valve closed.
Proceed as follows to ll the system:
1 connect the ow pipe of the automatic pump
to the tting of the lling valve (9 Fig. 1-29)
located under the pump and open the valve.
2 connect the return pipe of the automatic pump
to the tting of the draining valve (8 Fig. 1-29)
and open the draining valve.
3 e ow-rate regulator screw (11 Fig. 1-29)
must be orientated horizontally to ensure the
closure of the integrated ball valve. Open the
ball valve with thermometer (2 Fig. 1-29) above
the pump.
4 ll the lling pump tank with the amount of
glycol necessary plus a minimum amount to
be le on the bottom of the tank in order to
prevent air circulating inside the circuit.
5 e lling stage must have a minimum dura-
tion of 20 ÷ 25 minutes. is time is required
to completely remove all air from the circuit.
Every now and again open the ow rate regula-
tor adjustment screw in order to eliminate air
from inside (vertical position).
6 Eliminate any air in the solar circuit preferably
using the so-called "pressure shot" method,
which consists in raising the lling pressure of
the circuit followed by a quick opening of the
return valve (8 Fig. 1-29). is method allows
air to be expelled from the circuit.
7 Close the lling cock and switch the lling
pump o, open the regulator screw of the ow
rate regulator (notch in vertical position).
8 Leave the circuit pressurised. Any pressure
drop indicates a leak in the system.
9 Set the functioning pressure in the circuit
at 1.5 bar + 0.1 bar for every metre in the
distance between the solar manifold and the
expansion vessel (practically, set the same
pressure between expansion vessel and system).
N.B.: Do not exceed 2.5 bar.

19
INSTALLERUSERMAINTENANCE TECHNICIAN
10 Switch the solar pump on at a maximum
speed and make it run for at least 15 minutes.
11 Disconnect the lling pump and close the
ttings using the relevant screw caps.
12 Open the ball valve above the pump com-
pletely.
Do not ll the system in conditions with strong
insolation and with the manifolds at high
temperatures.
Make sure that all air bubbles have been com-
pletely eliminated.
Solar circuit vent.
Any air present in the system must be bled:
- on start-up (aer lling);
- if necessary, e.g. in the case of breakdown.
Attention: danger of burns from the liquid
contained in the collectors.
1.25 BOILER START UP (IGNITION).
In order to issue the Declaration of Conformity
required by the laws in force, one must full
the following requirements to commission the
boiler (the operations listed below must only
be performed by qualied personnel and in the
presence of professionals only):
- 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. 3.17);
- 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/exhaust concentric ter-
minal (if tted) is not blocked.
e boiler must not be started up even if only
one of the checks should be negative.
N.B.: only upon completing commissioning by
an installer, may an authorised rm carry out an
initial inspection of the boiler, which is required to
activate the Immergas warranty. e test certicate
and warranty is issued to the user.
1.26 DHW MIXING VALVE.
e thermostatic mixing valve mixes the cold
water with the hot water and via an internal wax
element, sensitive to the temperature, automati-
cally controls the temperature of the mixed water
set by the user.
N.B.: for excellent management of the tempera-
tures, the mixing valve must be set by the installer
at a safety temperature required by the user. e
outlet temperature of the domestic hot water
can also depend on the value set on the boiler,
however, the upper limit temperature value of
the domestic hot water is always determined by
the position of the mixing valve: knob position 1
= 42°C, 2 = 48°C, 3 = 54°C, 4 = 60°C (standard)
(the values indicated refer to a storage tank with
water at 70°C).
Any release of the three-way mixing valve. If
aer a long period of inactivity the three-way
mixing valve is blocked, it is necessary to act
manually on the knob positioned on the top of
the same in a way to release the shutter of the
valve itself.
1.27 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 “Pump sp.” in the
“Congurations” boiler menu must be changed.
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 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 (∆P-V)
P 2 upper (∆P-V) green
C 3 lower (∆P-C) - H=3 m
C 4 upper (∆P-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-
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) - Con-
stant curve (orange LED). The 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.

20
1-26A
1-26B
AB
C
D
E
F
G
H
1-25
INSTALLERUSERMAINTENANCE TECHNICIAN
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)
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
MAX
MIN