Immergas HERCULES SOLAR 26 2 ErP Operating instructions

HERCULES
SOLAR 26 2 ERP
Instruction and
recommendation booklet IE
*1.037974ENG*
STD.002104/002

STD.002104/002

e manufacturer declines all liability due to printing or transcription errors, reserving the right to make any modications to its technical and com-
mercial 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.
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 an authorised company,
which has specic technical expertise in the system sector, as required by 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 an authorised company. 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.
STD.002104/002

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 Boiler hydraulic connection......................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
1.10Tables of resistance factors
and equivalent lengths. ............................10
1.11 Installation of boiler type B with open
chamber and fan assisted (optional). .....12
1.12Concentric horizontal kit installation....13
1.13Concentric vertical kit installation.........14
1.14Separator kit installation..........................15
1.15Adaptor C9 kit installation. ....................16
1.16Ducting of ues or technical slots. .........17
1.17 Conguration type B, open chamber
and fan assisted for indoors.....................17
1.18Flue gas exhaust to ue/chimney............17
1.19Flues, chimneys, chimney
pots and terminals....................................18
1.20Central heating circuit lling..................18
1.21Condensate trap lling.............................18
1.22Gas system start-up. .................................18
1.23Solar circuit start-up.................................18
1.24Solar circuit lling. ...................................18
1.25Boiler start up (ignition)..........................19
1.26DHW mixing valve...................................19
1.27Circulation pump......................................19
1.28Solar circuit circulation pump. ...............21
1.29Main circulation unit components.........22
1.30Domestic hot water storage tank unit....23
1.31Kits available on request. .........................23
1.32Boiler 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
2.11Storage tank draining...............................31
2.12Anti-freeze protection..............................31
2.13Case cleaning.............................................31
2.14Decommissioning.....................................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
3.11three-way anti-block function. ...............37
3.12 Radiators antifreeze function. ................37
3.13 Periodical P.C.B. self-check.....................37
3.14Automatic vent function..........................37
3.15Yearly appliance check
and maintenance.......................................38
3.16Casing removal. ........................................39
3.17Variable heat output. ................................43
3.18Combustion parameters. .........................43
3.19 Technical data...........................................44
3.20Key for Data nameplate. ..........................45
3.21Technical parameters for mixed
boilers (in compliance
with Regulation 813/2013)......................46
3.22Product data sheet (in compliance
with Regulation 811/2013)......................46
3.23Parameters for lling in the
assembly sheet...........................................47
STD.002104/002

5
INSTALLERUSERMAINTENANCE TECHNICIAN
1BOILER 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.
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 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 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 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.
STD.002104/002

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)
STD.002104/002

7
INSTALLERUSERMAINTENANCE 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 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: 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.
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.
STD.002104/002

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: the manufacturer declines any re-
sponsibility for damage or physical injury caused
by failure to connect the boiler to an ecient
earth system or failure to comply with the refer-
ence 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 (Fig. 1-4
and 1-5). All Immergas chrono-thermostats are
connected with 2 wires only. Carefully read the
user and assembly instructions contained in the
accessory kit.
• On/O digital 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 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 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.
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)
STD.002104/002

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.
STD.002104/002

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 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. 1-8):
- 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
STD.002104/002