Immergas NIKE MYTHOS 24 2 E Instruction And Warning Book
Instruction and
*1.038789ENG*
warning book
IE
NIKE MYTHOS
24 2 E
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 qualied aer-sales service, prepared and updated to guarantee constant eciency 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 conrm your satisfaction for the Immergas product.
Contact our area authorised aer-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 Immergas Aer-Sales centres: they have original spare parts and are specically 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 specied in the regulations in force and principles of good practice.
In compliance with legislation in force, the systems must be designed by qualied 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 qualied
sta, intending sta with specic 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 Immergas Authorised Aer-sales Service represents a guarantee of qualications 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
Immergas S.p.A. declines all liability due to printing or transcription errors, reserving the right to make any modications to its technical and commercial
documents without forewarning.
INDEX
1 Boiler installation ...................................... 4
1.1 Installation recommendations. ................4
1.2 Main dimensions. ......................................5
1.3 Connections (Optional). .......................... 5
1.4 Remote controls and room chrono-
thermostats (Optional). ............................ 6
1.5 Ventilation of the rooms...........................7
1.6 Flue ducts. .................................................. 7
1.7 Flues/Chimneys. ........................................7
1.8 System lling. ............................................. 7
1.9 Gas system start-up. ..................................7
1.10 Boiler commissioning (ignition). ................8
1.11 Circulation pump. .....................................8
1.12 Kits available on request. .......................... 8
1.13 Boiler components. ...................................9
USER page INSTALLER page MAINTENANCE TECHNICIAN page
2 Instructions for use and maintenance ..10
2.1 Cleaning and maintenance. ...................10
2.2 Ventilation of the rooms.........................10
2.3 General warnings. ................................... 10
2.4 Control panel. ..........................................10
2.5 Troubleshooting. .....................................11
2.6 Restoring central heating system
pressure. .................................................... 11
2.7 System draining. .....................................11
2.8 Anti-freeze protection. ...........................12
2.9 Case cleaning. .......................................... 12
2.10 Decommissioning. ..................................12
3 Boiler commissioning
(initial check) ...........................................13
3.1 Hydraulic diagram. .................................13
3.2 Wiring diagram. ......................................14
3.3 Troubleshooting. .....................................14
3.4 Converting the boiler to other types of
gas. ............................................................. 15
3.5 Checks following conversion to another
type of gas. ................................................ 15
3.6 Possible adjustments. ..............................15
3.7 Programming the P.C.B. .........................15
3.8 Automatic slow ignition function with
timed ramp delivery. ............................... 16
3.9 "Chimney sweep function". ...................16
3.10 Heating Timer. .........................................16
3.11 Pump anti-block function. .....................16
3.12 Radiators anti-freeze function. ..............16
3.13 P.C.B. periodical self-check. ...................16
3.14 Casing removal. .......................................17
3.15 Yearly appliance check
and maintenance. ....................................18
3.16 Variable heat output. ...............................18
3.17 Combustion parameters. ........................19
3.18 Technical data. .........................................19
3.19 Data plate key. ..........................................20
BOILER
1
INSTALLATION
1.1 INSTALLATION RECOMMENDATIONS.
e Nike Mythos 24 2E boiler has been designed
for wall mounted installation only, for heating
environments and production of domestic hot
water for domestic use and similar purposes.
e place of installation of the appliance and
relative Immergas accessories must have suitable
features (technical and structural) such to allow
INSTALLERUSER
(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 components) as well as their eventual
replacement with appliances and/or equivalent
components.
e wall surface must be smooth, without any
protrusions or recesses enabling access to the
rear part. ey are not designed to be installed
on plinths or oors (Fig. 1-1).
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 (staples, nails, plastic bags, polystyrene
foam, etc.) constitute a hazard and must be kept
out of the reach of children. If the appliance
is installed inside or between cabinets, ensure
sucient space for normal servicing; therefore
it is advisable to leave clearance of at least 3
cm between the boiler casing and the vertical
sides of the cabinet. Leave adequate space above
the boiler for possible water and ue removal
connections. It is just as important that the intake
grids are not obstructed. Keep all ammable
objects away from the appliance (paper, rags,
plastic, polystyrene, etc.). Do not place household
appliances underneath the boiler as they could
be damaged if the safety valve intervenes with
an obstructed conveying system (the safety valve
must be conveyed away by a draining funnel), or
MAINTENANCE TECHNICIAN
if there are leaks from the hydraulic connections;
on the contrary, the manufacturer cannot be
held responsible for any damage caused to the
household appliances.
For the aforementioned reasons, we recommend
not placing furnishings, furniture, etc. under
the boiler.
In the event of malfunctions, faults or incorrect
operation, turn the appliance o immediately
and contact an authorised company (e.g. the
Immergas Technical Assistance centre, which
has specically 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:
- these boilers cannot be installed in bedrooms,
studio ats and bathrooms. ey also cannot
be installed in rooms with wood (or solid
fuel) burning heat generators and in adjacent
and communicating rooms;
- installation in places with a fire risk is
prohibited (for example: garages, closed
parking stalls), gas appliances and relative ue
ducts, ue exhaust pipes and combustion air
intake pipes;
- installation is prohibited on the vertical
projection of cooking hobs;
- installation is also prohibited in places/
environments that constitute common parts
of oce condominiums such as stairs, cellars,
entrance halls, attics, los, 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);
- type B open chamber boilers must not be
installed in places where commercial, artisan
or industrial activities take place, which use
products that may develop volatile vapours
or substances (e.g. acid vapours, glues, paints,
solvents, combustibles, etc.), as well as dusts
(e.g. dust deriving from the working of
wood, coal nes, cement, etc.), which may be
harmful for the components of the appliance
and jeopardise operation;
- they must also be installed in rooms where
the temperature cannot fall below 0°C and
must not be exposed to weathering.
Attention: wall mounting of the boiler must
guarantee stable and ecient support for the
generator.
e plugs (standard supply) are to be used only in
conjunction with the mounting brackets or xing
template to x the appliance to the wall; they only
ensure adequate support if inserted correctly
(according to technical standards) in walls made
of solid or semi-hollow brick or block. In the
case of walls made from hollow brick or block,
partitions with limited static properties, or in any
case walls other than those indicated, a static test
must be carried out to ensure adequate support.
N.B.: the hex head screws supplied in the blister
pack are to be used exclusively to x the relative
mounting bracket to the wall.
ese boilers are used to heat water to below
boiling temperature in atmospheric pressure.
ey must be connected to a central heating
system and hot water circuit suited to their
performance and capacity.
YES NO
Fig. 1-1
4
1.2 MAIN DIMENSIONS.
Key:
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic cold water inlet
R - System return
M - System ow
V - Electrical connection
N.B.: connection group (optional)
Fig. 1-2
Height
(mm)
751 440 240
GAS
G AC AF R M
3/4” 1/2” 1/2” 3/4” 3/4”
Width (mm) Depth (mm)
CONNECTIONS
DOMESTIC
WATER
SYSTEM
1.3 CONNECTIONS OPTIONAL.
Gas connection (Appliance category II
Our boilers are designed to operate with methane
gas (G20) or LPG. Supply pipes must be the same
as or larger than the 3/4”G boiler tting. Before
connecting the gas line, carefully clean inside
all the fuel feed system pipes to remove any
residue that could impair boiler eciency. Also
make sure the gas corresponds to that for which
the boiler is prepared (see boiler data-plate).
If dierent, 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 according to the type
used in the boiler, which must comply with the
regulations in force, as insucient levels can
reduce generator output and cause malfunctions.
Ensure correct gas cock connection by following
the mounting instructions illustrated in the
figure. The gas supply pipe must be suitably
dimensioned according to current regulations
in order to guarantee correct gas ow to the
burner even in conditions of maximum generator
output and to guarantee appliance efficiency
(technical specications). e coupling system
must conform to standards.
Fuel gas quality. The appliance has been
designed to operate with combustible gas free of
impurities; 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.
2H3+
).
INSTALLERUSER
MAINTENANCE TECHNICIAN
5
Hydraulic connection.
Attention: in order not to void the heat primary
exchanger warranty, before making the boiler
connections, carefully clean the heating system
(pipes, radiators, etc.) with special pickling or
de-scaling products to remove any deposits that
could compromise correct boiler operation.
A chemical treatment of the thermal system
water is required, in compliance with the
technical standards in force, in order to protect
the system and the appliance from deposits (e.g.,
INSTALLERUSER
limescale), slurry or other hazardous deposits.
Water connections must be made in a rational way
using the couplings on the boiler template. e
boiler safety valve outlet must be connected to an
appropriate drain. Otherwise, the manufacturer
declines any responsibility in case of ooding if
the drain valve cuts in.
In order to meet the system requirements
established by the regulations in terms of
pollution of drinking water, we recommend
installing the IMMERGAS anti-backow 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 of appliance
eciency features, in the presence of water whose
features can lead to the deposit of lime scale,
installation of the “polyphosphate dispenser” kit
is recommended.
Electrical connection. e Nike Mythos 24 2E
boiler has an IPX4D protection rating for the
entire appliance. Electrical safety of the appliance
is reached only when it is correctly connected
to an ecient earthing system as specied by
current safety standards.
Attention: Immergas S.p.A. declines any
responsibility for damage or physical injury
caused by failure to connect the boiler to an
ecient earth system or failure to comply with
the reference standards.
Also ensure that the electrical installation
corresponds to maximum absorbed power
specications as shown on the boiler data-plate.
Boilers are supplied complete with an “X” type
power cable without plug. e power supply
cable must be connected to a 230V ±10% / 50Hz
mains supply respecting L-N polarity and earth
MAINTENANCE TECHNICIAN
connection; , this network must also have a
multi-pole circuit breaker with class III overvoltage category.
When replacing the power supply cable, contact a
qualied company (e.g. the Immergas Authorised
Aer-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 2A quick-blow fuse. For the main power
supply to the appliance, never use adapters,
multiple sockets or extension leads.
1.4 REMOTE CONTROLS AND
ROOM CHRONOTHERMOSTATS
OPTIONAL.
e boiler is prepared for the application of room
chrono-thermostats or remote controls, which
are available as optional kits. (Fig. 1-4)
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
nighttime (lower temperature);
- set a weekly programme 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 programme);
- forced automatic mode (momentarily
changing the temperature of the automatic
programme).
e chrono-thermostat is powered by two 1.5V
LR 6 type alkaline batteries.
• Comando Amico Remoto Remote Control
Device V2 (CARV2) with climate chronothermostat function. In addition to the
functions described in the previous point, the
CARV2 panel enables the user to control all the
important information regarding operation
of the appliance and the heating system with
the opportunity to easily intervene on the
previously set parameters, without having
to go to 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 the transmission of data between
boiler and chrono-thermostat.
CARV2 or chrono-thermostat On/O electric
connection (Optional). e operations described
below must be performed aer having removed
the voltage from the appliance. 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
supply, otherwise the P.C.B. would be damaged.
Any CARV2 must be connected to clamps 40 and
41 eliminating jumper X40 on the circuit board,
paying attention not to invert the polarity in the
connections (Fig. 3-2). 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 CARV2 remote control 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.
POWER SUPPLY CABLE
CAVO ALIMENTAZIONE
Fig. 1-3
Fig. 1-4
6
1.5 VENTILATION OF THE ROOMS.
In the room in which the boiler is installed it is
necessary that at least as much air ows as that
requested for by normal combustion of the gas
and ventilation of the room. Natural air ow must
take place directly through:
- permanent openings in the walls of the room
to be ventilated that lead towards the outside;
- ventilation pipes, individual or branched type.
e air used for ventilation must be withdrawn
directly from outside, in an area away from
sources of pollution. Natural air flow is also
allowed indirectly by air intake from adjoining
rooms. For further information relative to
ventilation of the rooms follow that indicated
by the standards in force and the following
modications and integrations.
Evacuation of foul air. In the rooms where
the gas appliances are installed it may also be
necessary, as well as the intake of combustion
agent air, to evacuate foul air, with consequent
intake of a further equal amount of clean air. is
must be realised respecting the provisions of the
technical regulations in force.
1.6 FLUE DUCTS.
e gas appliances with attachment for the ue
gas discharge pipe must have direct connection
to chimneys or safely ecient ues.
The combustion products can be discharged
directly outside only if these are missing, as long
as the standard regulations for the ue terminal
are respected as well as the existing laws.
Connection to chimneys or flues. The
connection of the appliances to a chimney or
ue takes place by means of ue ducts.
In the event of ttings with pre-existing ues, these
must be perfectly clean because the detachment
of any waste from the walls during functioning,
could block the passage of ue gases, thus causing
extremely dangerous situations for the user.
e ue ducts must be connected to the chimney
or ue in the same room in which the appliance
is installed or, at most, in the adjoining room and
must comply with the requirements indicated by
the regulation.
1.7 FLUES/CHIMNEYS.
For the appliances with natural draught
individual chimneys and branched flues can
be used.
Individual chimneys. e individual ues must
be dimensioned with respect to the standard
in force.
Branched ues. In buildings with lots of oors,
branched flues can be used for the natural
draught evacuation of combustion products. New
ues must be designed following the calculation
method and provisions of the regulation.
Chimney caps. A chimney cap is a device
crowning an individual chimney or collective
branched flue. The device facilitates the
dispersion of combustion products, even with
bad weather, and prevents the deposit of foreign
bodies.
It must meet the standard requirements
e outlet quota, corresponding to the top of the
chimney/ue, independently of any caps, must
be out of the “backow area”, in order to prevent
the formation of counter-pressures that impede
the free discharge of the combustion products
into the atmosphere. It is therefore necessary
to use the minimum heights indicated in the
gures stated in the regulation, depending on
the slope of the roof.
Direct exhaust outside. e natural draught
appliances, envisioned to be connected to a
chimney or a ue, can discharge the combustion
products directly to the outside, through a
pipe passing through the perimeter walls of
the building. In this case discharge takes place
through an exhaust ue, which is connected to
a draught terminal at the outside.
Exhaust flue. The exhaust flue must be in
compliance with the same requisites listed for
the ue ducts, with further provisions stated in
the regulation in force.
Positioning the exhaust terminals. e exhaust
terminals must:
- be installed on external perimeter walls of the
building;
- be positioned according to the minimum
distances specified in current technical
standards.
Fume exhaust of forced draught appliances
in closed open-top environments. In spaces
closed on all sides with open tops (ventilation
pits, courtyards etc.), direct flue gas exhaust
is allowed for natural or forced draught gas
appliances with a heating power range from 4 to
35 kW, provided the conditions as per the current
technical standards are respected.
Important: it is prohibited to put the fumes
exhaust control device out of order voluntarily.
Every piece of this device must be replaced using
original spare parts if they have deteriorated. In
the case of repeated interventions of the fumes
exhaust control device, check the fumes exhaust
ue and the ventilation of the room in which the
boiler is located.
1.8 SYSTEM FILLING.
Once the boiler is connected, proceed with
system filling via the filling valve (Fig. 2-2).
Filling is performed at low speed to ensure
release of air bubbles in the water via the boiler
and heating system vents. e boiler has a builtin automatic venting valve on the circulator.
Open the radiator vent valves. Close radiator
vent valves when only water escapes from them.
Close the lling valve when the boiler manometer
indicates approx. 1.2 bar.
N.B.: during these operations start up the
circulation pump at intervals, acting on the main
switch positioned on the control panel. Vent the
circulation pump by loosening the front cap and
keeping the motor running.
Tighten the cap aer the operation.
1.9 GAS SYSTEM STARTUP.
To start up the system, make reference to the
Standard: is divides the systems and therefore
the start-up operations into three categories: new
systems, modied 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 specications.
INSTALLERUSER
MAINTENANCE TECHNICIAN
7
1.10 BOILER COMMISSIONING
IGNITION.
In order to issue the Declaration of Conformity
required by the regulations in force, one must
comply with the following requirements to
commission the boiler (the operations listed
below must only be performed by qualified
personnel and in the presence of sta only):
- check that the internal system is properly sealed
according to the regulations in force;
- make sure that the type of gas used corresponds
to boiler settings;
INSTALLERUSER
- check that there are no 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. 3.16);
- check the correct ventilation of the rooms;
- check the existing draught during normal
functioning of the appliance, e.g. a draught
gauge positioned at the exit of the appliance
combustion products;
- check that there is no backow of combustion
products into the room, even during
functioning of fans;
- ensure that the safety device intervenes in the
event of gas supply failure and check the relative
intervention time;
- check activation of the main switch located
upstream of the boiler.
e boiler must not be started up even if only
one of the checks should be negative.
N.B.: the preliminary boiler check must be carried
out by an authorised company. e standard boiler
warranty is valid from the date of inspection.
e test certicate and warranty is issued to the
us er.
1.11 CIRCULATION PUMP.
The Nike Mythos 24 2E series boilers are
supplied with a built-in circulation pump with
three-position electric speed control. e boiler
does not operate correctly with the circulation
pump on rst speed. To ensure optimal boiler
operation, in the case of new systems (single
pipe and module) it is recommended to use the
pump at maximum speed. e circulation pump
is already tted with a capacitor.
Pump release. If, aer a prolonged period of
inactivity, the circulation pump is blocked,
unscrew the front cap and turn the motor sha
using a screwdriver. Take great care during this
operation to avoid damage to the motor.
By-pass regulation (part. 16 Fig. 1-6). If
necessary, the by-pass can be adjusted according
to system requirements from a minimum (bypass excluded) to a maximum (by-pass inserted)
represented by the graph (Fig. 1-5). Make the
adjustment using a at head screwdriver, turn
clockwise and insert the by-pass; by turning it
anti-clockwise it is excluded.
1.12 KITS AVAILABLE ON REQUEST.
• Connection unit kit (on request). The kit
includes pipes, ttings and cocks (including
gas cock), to carry out all connections to the
boiler system
• System shut o valves kit. e boiler is designed
for installation of system interception cocks
to be placed on ow and return pipes of the
connection assembly. is kit is particularly
useful for maintenance as it allows to drain just
the boiler without having to empty the entire
system.
• Polyphosphate dispenser kit. e polyphosphate
dispenser reduces the formation of lime-scale
and preserves the original heat exchange and
domestic hot water production conditions.
e boiler is prepared for application of the
polyphosphate dispenser kit.
e above-mentioned kits are supplied complete
with instructions for assembly and use.
MAINTENANCE TECHNICIAN
Head available to the system.
Head (kPa)
A
B
C
D
Flow rate (l/h)
A = Head available to the system at maximum
speed with by-pass excluded
B = Head available to the system at maximum
speed with by-pass inserted
C = Head available to the system at second
O)
2
Head (m H
speed with by-pass excluded
D = Head available to the system at second
speed with by-pass inserted
Fig. 1-5
8
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