Immergas MAGIS HERCULES ERP Installation and operation manual

MAGIS HERCULES
ERP
IE
Instruction and
recommendation booklet
*1.038684ENG*

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.
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cation 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 9001:2008.
For further details on the product CE marking, request a copy of the Declaration of Conformity from the manufacturer, specifying the appliance model
and the language of the country.

INDEX
USER pageINSTALLER page MAINTENANCE TECHNICIAN page
1 Boiler installation .......................................5
1.1 Installation recommendations. .................5
1.2 Main boiler dimensions.............................6
1.3 Main dimensions of the remote zone
control. .........................................................7
1.4 Gas connection. ..........................................7
1.5 Boiler hydraulic connection......................7
1.6 Solar circuit hydraulic connection. .......... 7
1.7 Electric connection.....................................8
1.8 Programmable room thermostats
(Optional)....................................................9
1.9 External temperature probe (Optional)...9
1.10Humidity temperature probes (optional).9
1.11Immergas ue systems. ............................10
1.12Tables of resistance factors and equivalent
lengths........................................................10
1.13Installation of boiler type B with open
chamber and fan assisted (optional). .....12
1.14Concentric horizontal kit installation....13
1.15Concentric vertical kit installation.........14
1.16Separator kit installation..........................15
1.17Adaptor C9 kit installation. ....................16
1.18Ducting of ues or technical slots. .........17
1.19Conguration type B, open chamber and
fan assisted for indoors. ...........................17
1.20Flue exhaust to ue/chimney. .................17
1.21Flues, chimneys, chimney pots and
terminals. ...................................................18
1.22Central heating / cooling circuit lling..18
1.23Condensate trap lling.............................18
1.24Gas system start-up. .................................18
1.25Solar circuit start-up.................................18
1.26Solar circuit lling. ...................................18
1.27Boiler start up (ignition)..........................19
1.28DHW mixing valve...................................19
1.29Hot water storage tank.............................19
1.30Circulation pump......................................20
1.31Solar circulation unit components.........22
1.32Kits available on request. .........................22
1.33Boiler components....................................23
2 Use and maintenance instructions.........24
2.1 Cleaning and maintenance......................24
2.2 General warnings......................................24
2.3 Remote zone control - control panel......25
2.4 Boiler control panel..................................25
2.5 Description of functioning states ...........26
2.6 Using the boiler.........................................26
2.7 Boiler parameters and information
menu...........................................................27
2.8 Use of the remote zone control...............28
2.9 Troubleshooting........................................32
2.10Boiler shutdown........................................34
2.11Restoring central heating system
pressure. .....................................................34
2.12Emptying the system and the storage
tank.............................................................34
2.13Anti-freeze protection..............................34
2.14Case cleaning.............................................34
2.15Decommissioning.....................................34
3 Boiler commissioning (initial check).....35
3.1 Hydraulic diagram....................................36
3.2 Installation example Hydraulic
Diagram . ...................................................37
3.3 Wiring diagram - boiler circuit...............38
3.4 Troubleshooting........................................40
3.5 Converting the boiler
to other types of gas..................................40
3.6 Calibration of number of fan revs. .........40
3.7 Adjustment of the air-gas ratio. ..............40
3.8 Checks following conversion to another
type of gas. .................................................41
3.9 Programming the boiler P.C.B................41
3.10Programming the boiler remote
control. ......................................................43
3.11Programming the remote zone control
parameters. ...............................................46
3.12‘’Chimney sweep’’ function......................47
3.13Pump anti-lock function. ........................47
3.14three-way anti-lock function...................47
3.15Radiators anti-freeze function. ...............47
3.16Boiler control panel electronic board
periodic self-check....................................47
3.17Automatic vent function..........................47
3.18Yearly appliance check and
maintenance. .............................................47
3.19Casing removal. ........................................48
3.20Boiler separation.......................................54
3.21Variable heat output. ................................58
3.22Combustion parameters. .........................58
3.23TECHNICAL DATA................................59
3.24Key for Data nameplate. ..........................60
3.25Technical parameters for combination
boilers (in compliance with Regulation
813/2013)...................................................61
3.26Product che (in compliance with
Regulation 811/2013)...............................61
3.27Parameters for lling in
the package che.......................................62

5
INSTALLERUSER
MAINTENANCE TECHNICIAN
1BOILER INSTALLATION
1.1 INSTALLATION
RECOMMENDATIONS.
The Magis Hercules ErP boiler is designed
solely for base installations, it is predisposed to
be coupled with a solar panel system and with
the Immergas heat pump.
The electronics allow to manage the three
systems, with which it produces domestic hot
water for household and similar purposes, room
heating and cooling (cooling is performed by the
heat pump only).
In the event the unit is installed in damp places,
one must provide an insulation system under-
neath it, to insulate it from the ground.
e place of installation of the appliance and
relative Immergas accessories must have suitable
features (technical and structural) such to allow
(always in safety, efficiency and comfortable
conditions):
- installation (according to the provisions of the
technical legislation and technical regulations);
- maintenance operations (including scheduled,
periodic, routine and special maintenance);
- removal (to outdoors in the place for loading
and transporting the appliances and compo-
nents) as well as their eventual replacement
with appliances and/or equivalent components.
By varying the type of installation the classica-
tion of the boiler also varies, precisely:
- Type B23 or B53 boiler if installed using the rel-
evant terminal for air intake directly from the
room in which the boiler has been installed.
- Type C boiler if installed using concentric
pipes or other types of pipes envisioned for
sealed chamber boilers for air intake and expul-
sion of ue gases.
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.
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.
- In the event of installing a heat pump to
integrate the gas appliance, the installation
company must also be in possession of the
requirements of the legislation in force on en-
vironmental protection relating to uorinated
greenhouse gasses.

6
1-1
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.2 MAIN BOILER DIMENSIONS.
Key:
RP - Return to solar panels G 3/4”
MP - Flow from solar panels G 3/4”
RB3 - Zone 3 low temperature system return G 1” (optional)
MB3 - Zone 3 low temperature system ow G 1” (optional)
RB2 - Zone 2 low temperature system return G 1”
MB2 - Zone 2 low temperature system ow G 1”
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)
MHT - Flow from heat pump G 3/4”
RHT - Return to heat pump G 3/4”
V - Electrical connection
SC - Condensate drain (min. internal diameter Ø13 mm)

7
1-2
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.3 MAIN DIMENSIONS OF THE REMOTE ZONE CONTROL.
1.4 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.
1.5 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.
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. 1.23). Also, comply
with national and local regulations on discharg-
ing waste waters.
1.6 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.:
- e pipes for connection to the solar collector
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.

8
1-4
CAVO ALIMENTAZIONE
CALDAIA
CAVO COMANDO REMOTO
DI ZONA
CAVO SONDA SOLARE
CAVO POMPA DI CALORE
1-3
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.7 ELECTRIC CONNECTION.
The electrical connection operations must be
performed aer having disconnected the power
from the appliance.
e “Magis Hercules ErP” boiler has an IPX5D
protection rating for the entire appliance. Electri-
cal 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. declines any respon-
sibility for damage or physical injury caused by
failure to connect the boiler to an ecient earth
system or failure to comply with the reference
standards.
Also ensure that the electrical installation cor-
responds to maximum absorbed power speci-
cations as shown on the boiler data nameplate.
Boilers are supplied complete with an “X” type
power cable without plug.
e power supply cable must be connected to
a 230V ±10% / 50Hz mains supply respecting
L-N polarity and the earth connection on
this network must also feature a multi-pole
circuit breaker of class III overvoltage category.
When replacing the power supply cable, contact
a qualied rm (e.g. the Authorised Aer-Sales
Technical Assistance Service).
e power cable must be laid as shown (Fig. 1-3).
e boiler is equipped with two fuses: one 3.15A
230 V fast fuse and one 315 mA 24 V fuse for the
low voltage circuit, within the system manager
unit. Furthermore, an additional 3.15A 230 V fast
fuse is envisaged on the electronic board inside
the boiler control panel.
For the main power supply to the appliance,
never use adapters, multiple sockets or exten-
sion leads.
Make the various connections in the relevant
system manager box.
• Remote zone control connection. Make the
data connection to the boiler using a suitably
sized 3-pole cable, connecting it to the termi-
nals T-, T+, GND (Fig. 1-4) and making it fol-
low the relevant path and making it follow the
relevant path as shown in the gure (1-3). e
remote zone control is powered independently
from the boiler at 230 V and for the connection
use a 2-pole cable.
• Solar panels electric connection. To make the
connection, only use a suitably sized electric
cable, making it cross the same path as the
power cable (in the predisposed pipe), make
the connections on terminals 45 and 46, elimi-
nating resistance R15 (Fig. 1-4). Connect the
supplied probe on the solar panel and position
it in the relevant seat.
•Heat pump electrical connection. e boiler
can be combined with an Immergas heat pump
which must be connected to the boiler on
terminals T- and T+ as shown in the wiring
diagram (Fig. 1-4). e heat pump is powered
independently by the boiler at 230 V.
Congure the boiler parameters as indicated in
paragraph “circuit board programming” (Par.
3.9).
• Important: it is mandatory to prepare separate
lines with dierent supply voltage; it is essential
to separate the low voltage connections from
the 230 V ones. All boiler pipes must never be
used for earthing the electrical or telephone
system. Ensure elimination of this risk before
making the boiler electrical connections.
• Installation with system operating at low
direct temperature (zone 1). e boiler can
power a low temperature system directly by
conguring the remote zone control adequate-
ly. In this situation it is good practice to insert
a relevant safety kit (optional) made up from
a thermostat (with adjustable temperature).
Execute connection to terminal boards 14
and 15, eliminating the jumper (Fig. 1-4). e
thermostat must be positioned on the system
ow pipe zone 1 (MA1) at a distance of at least
2 metres from the boiler.
Attention: in the event the safety thermostat
intervenes, the boiler is switched o until the
normal operating conditions are restored.
• Photovoltaic system installation. Connecting
the boiler to a photovoltaic system enhances
use of the heat pump when the photovoltaic
panels are operating. Connect to clamps 61
and 62.
Key:
F1 - Main phase fuse, (3.15 A F)
L-N - Main supply voltage
VG - Low voltage outlet
VGO - Low voltage outlet
61 - 62 - Photovoltaic inlet (62 = GND)
40-1 - 41 - Zone 1 room thermostat (41 = GND)
40-2 - 41 - Zone 1 room thermostat (41 = GND)
14 - 15 - System On/O (14(24) = GND)
22 - Sensor kit = temperature
23 - Sensor kit = humidity
24 - Sensor kit = GND
25 - Sensor kit = +Vdc (for humidity probe)
29-1 - 30-1 - Zone 1 dehumidication control
29-2 - 30-2 - Zone 2 dehumidication control
31-2 - 32-2 - Zone 2 air conditioning control
HEAT PUMP CABLE
SOLAR PROBE CABLE
REMOTE ZONE CONTROL
CABLE
BOILER POWER CABLE
System ON/
OFF
Zone 2 TA
(optional)
Zone 1 TA
(optional)
Dehumidier
(optional)
Dehumidier
(optional)
Zone 2
Zone 1
Room
humidity
temperature
sensor
(optional)
Main zone
remote
control
Zone
remote
control
(optional)

9
1-7 1-8
45
31
58
1-5 1-6
30
127
80
83
22 22
40 40
INSTALLERUSER
MAINTENANCE TECHNICIAN
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.
MAX
MIN
MAX
MIN
1.8 PROGRAMMABLE ROOM
THERMOSTATS OPTIONAL.
For the additional zones the boiler is predisposed
for the application of additional zone controls, or
alternatively the extra zones can be managed via
digital On/O chrono-thermostats.
• On/O digital Immergas chrono-thermostat
(Fig. 1-5). 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.
On/O chrono-thermostat electric connection
(Optional). Any On/O room chrono-thermo-
stat must be connected to clamps 40-1 - 41 and
40-2 - 41, eliminating the jumper (Fig. 1-4). Make
sure that the On/O thermostat contact is of the
“clean” type, i.e. independent of the mains supply,
otherwise the P.C.B. would be damaged.
Attention: the jumpers on clamps 40-1 - 41 and
40-2 - 41 must only be eliminated if there is an
On/O digital chrono-thermostat.
1.9 EXTERNAL TEMPERATURE PROBE
OPTIONAL.
In the event the external probe on the heat
pump is not positioned in a suitable manner
for the adjustment of the system temperatures
(for example exposure to the South or directly
exposed to the sun) it is possible to connect a
replacement Immergas external probe (Fig. 1-7)
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 de-
creased when the external temperature increases,
in order to adjust the heat supplied to the system
according to the change in external temperature.
In presence of the additional external probe, one
must disable the external probe tted on the heat
pump as indicated in the paragraph "electronic
board programming" (Par. 3.10).
e electric connection of the external probe
must be made on clamps 38 and 39 on the system
manager box (Fig. 1-4).
1.10 HUMIDITY TEMPERATURE PROBES
OPTIONAL.
In the event the thermal system needs to man-
age the humidity and the relative dew point,
one must install a humidity temperature probe
that is available as an optional kit (Fig. 1-6). e
probe only manages the humidity parameter and
controls the ow temperature during the cooling
stage, therefore heating and cooling requests
must always be managed by an On/O room
chrono-thermostat. e probe can be connected
directly to the electric system of the boiler. e
electric connection of the external probe must be
made on clamps 24 ÷ 25 on the system manager
box (Fig. 1-4).

10
(A)
(B)
1-9
INSTALLERUSER
MAINTENANCE TECHNICIAN
1.12 TABLES OF RESISTANCE FACTORS
AND EQUIVALENT LENGTHS.
TYPE OF DUCT
Resistance
Factor
(R)
Equivalent length
in m of concentric
pipe Ø 80/125
Concentric pipe Ø 80/125 m 1 2.1 1
Concentric bend 90° Ø 80/125 3.0 1.4
Concentric bend 45° Ø 80/125 2.1 1
Terminal complete with concentric
horizontal intake-exhaust Ø 80/125 2.8 1.3
Terminal complete with concentric
vertical intake-exhaust Ø 80/125 3.6 1.7
Concentric bend 90° Ø 80/125 with
inspection 3.4 1.6
Stub pipe with inspection Ø 80/125 3.4 1.6
1.11 IMMERGAS FLUE SYSTEMS.
Immergas supplies various solutions separately
from the boilers regarding the installation of air
intake terminals and ue extraction, which are
fundamental for boiler operation.
Attention: the boiler must be installed 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. 1-9):
- 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.