Immergas AVIO 24 2 ERP Instruction Booklet And Warning
Instruction booklet and
*1.038455ENG*
warning
IE
AVIO 24 2 ERP
Installer
User
Maintenance Technician
Wall-hung boiler with storage
tank, open chamber (type B)
and natural draught
e European regulation 813/2013 provides that
this boiler can be installed only to replace similar
equipment connected to existing branched
multiple ues.
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.
For any interventions or routine maintenance contact Authorised Centres: these have original spare parts and boast of specic preparation directly from the
manufacturer.
General recommendations
All Immergas products are protected with suitable transport packaging.
e material must be stored in dry premises and protected against weathering.
e instruction book is an integral and important part of the product and must be consigned to the user also in the case of transfer of ownership.
It must be kept well and consulted carefully, as all of the warnings supply important indications for safety in the 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. Instal-
lation 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 specic technical expertise in the system sector, as required by Law.
Improper installation or assembly of Immergas appliance and/or components, accessories, kit and devices can cause unexpected problems to persons, animals
and objects. Read the provided product instructions carefully in order to install the product correctly
Maintenance must be carried out by skilled technical sta. e 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 must be considered improper and therefore dangerous.
In the case of errors during installation, running and maintenance due to the failure to comply with the technical laws in force, standards or the 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 oce in via Cisa Ligure 95 42041 Brescello (RE), declares that the design, manufacturing and aer-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.
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 Installation of the boiler ...........................5
1.1 Installation recommendations. ................5
1.2 Main dimensions. ......................................5
1.5 Gas attachment. .........................................6
1.6 Hydraulic attachment. .............................. 6
1.7 Electrical connection. ............................... 6
1.3 Antifreeze protection. ...............................6
1.4 Boiler connection unit. ............................. 6
1.8 Remote controls and room
chronothermostats (optional). ................ 7
1.9 External probe (optional). ........................7
1.10 Ventilation of the rooms...........................8
1.11 Evacuation of combustion products:
ue duct and branched multiple ues ... 8
1.12 Flue exhaust control device. .....................8
1.13 System lling. ............................................. 8
1.14 Gas system start-up. ..................................8
1.15 Start-up of the boiler (ignition). ..............8
1.16 Domestic hot water boiler device............8
1.17 Circulation pump. .....................................9
1.18 Kits available on request. ........................ 10
1.19 Boiler components. .................................11
USER page INSTALLATOR page MAINTENANCE page
2 Instructions for use and maintenance ..12
2.1 Cleaning and maintenance. ...................12
2.2 Ventilation of the rooms.........................12
2.3 General warnings .................................... 12
2.4 Control panel. ..........................................12
2.5 Ignition of the boiler. ..............................13
2.6 Fault and anomaly signals. ..................... 13
2.7 Boiler shutdown. .....................................14
2.8 Restoring heating system pressure. .......14
2.9 Draining the system. ...............................14
2.10 Draining the boiler. .................................14
2.11 Anti-freeze protection. ...........................14
2.12 Case cleaning. .......................................... 14
2.13 Decomissioning. ......................................14
3 Boiler commissioning
(initial check) ...........................................15
3.1 Hydraulic layout. .....................................15
3.2 Wiring diagram. ......................................16
3.3 Troubleshooting. .....................................16
3.4 Converting the boiler to
other types of gas. ....................................17
3.5 Checks following conversion to
another type of gas. .................................17
3.6 Possible adjustments of the gas valve. ..17
3.7 Programming the circuit board.............17
3.8 Automatic slow ignition function with
timed ramp delivery. ............................... 18
3.9 “Chimney sweep” function. ...................18
3.10 Pump anti-block function. .....................19
3.11 ree-way anti-block system. ................19
3.12 Radiator anti-freeze function. ...............19
3.13 Electronic card periodical self-check. ..19
3.14 Yearly appliance check and
maintenance. ............................................19
3.15 Casing removal. .......................................19
3.16 Variable heat power. ................................20
3.17 Combustion parameters. ........................20
3.18 Technical data. .........................................21
3.19 Data plate key. ..........................................22
3.20 Technical parameters for combination
boilers (in compliance with
Regulation 813/2013). ............................23
3.21 Product che (in compliance with
Regulation 811/2013). ............................23
3.22 Parameters for lling in
the package che. ....................................24
INSTALLATION OF THE
1
BOILER
1.1 INSTALLATION RECOMMENDATIONS.
e Avio 24 2 ErP boiler has been designed for
wall mounted installation only, for heating 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
(always in safety, efficiency and comfortable
INSTALLATORUSER
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 possible replacement
with equivalent appliances and/or 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.
Attention: Immergas 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 (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 sufficient space for normal servicing;
therefore it is advisable to leave a 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 fume removal connections.
At least 60 cm must be le below the boiler
in order to guarantee replacement of the
magnesium anode.
MAINTENANCE TECHNICIAN
It is just as important that the intake grids are
not obstructed.
Keep all flammable 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 (if not conveyed away
by a draining funnel), or 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 a malfunction, fault or incorrect
operation, turn the appliance o and contact
an authorised company (e.g. the Authorised
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:
- installation of these boilers in bedrooms,
studio ats and bathrooms, or in premises
where there are wood red heaters (or by
solid fuels in general) and in premises next
to or connected to them, is subject to the
regulatory/legislative provisions in force in
the country.
- installation in places with a fire risk is
prohibited (for example: underground car
parks, garages), potentially dangerous places,
gas appliances and relative ue ducts.
- installation is prohibited on the vertical
projection of cooking hobs;
- installation is forbidden in places/rooms
that constitute public areas of apartment
buildings, internal stairways or other
escape routes (e.g. landings, entrance halls,
etc.) unless otherwise provided by local
regulations;
- install ation is also forbidden in places/rooms
that constitute public areas of apartment
buildings such as cellars, entrance halls, attics,
los, etc., unless otherwise provided for by
local regulations 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 damaging for the components of the appliance and
jeopardise functioning.
1.2 MAIN DIMENSIONS.
Height
(mm)
900 580 380
GAS PLANT
G R M AC AF
1/2” 3/4” 3/4” 1/2” 1/2”
Width
(mm)
ATTACHMENTS
Depth
(mm)
DOMESTIC
HOT WATER
YES NO
1-1
- ey must also be installed in an environment in which the temperature cannot fall
below 0°C. They must not be exposed to
atmospheric agents.
- is natural draught boiler can be connected
only to a multiple branched ue served by
a variety of users in existing buildings. e
boiler takes the combustion air directly from
the installation room and is equipped with
draught-breaker/anti-wind device. Due to
lower eciency, any other use of this boiler
must be avoided as it would lead to greater
consumption and higher operating costs.
Important: 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
1-2
Key:
G - Gas supply
R - System return
M - System delivery
RC - Domestic hot water re-circ.
AC - Domestic hot water outlet
AF - Domestic cold water inlet
V - Electric attachment
4
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.
These boilers are used to heat water to below
boiling temperature in atmospheric pressure.
ey must be connected to a heating system
and hot water circuit suited to their performance
and capacity.
Anti-Legionella thermal treatment of the Immergas storage tank (which can be activated
through the specic function present on the set
thermoregulation systems): during this phase,
the water temperature inside the storage tank exceeds 60 °C resulting in burns hazards. Keep this
DHW treatment under control (and inform the
users), to prevent unexpected damage to persons,
animals and objects. If required, a thermostatic
valve must be installed at the DHW outlet to
prevent burns.
1.3 ANTIFREEZE PROTECTION.
Minimum temperature -5°C. e boiler comes
standard with an anti-freeze function that activates the pump and burner when the system
water temperature in the boiler falls below 4°C.
e antifreeze function is only guaranteed if:
- the boiler is correctly connected to gas and
electricity power supply circuits;
- the boiler is powered constantly;
- the boiler is on and not in Stand-by;
- the boiler is not in ignition failure block (Par.
2.7);
- the boiler essential components are not faulty.
In these conditions the boiler is protected against
freezing to an ambient temperature of -5°C.
N.B.: if the boiler is installed in places where
the temperature falls below 0°C the domestic
hot water and central heating attachment pipes
must be insulated.
e water in the storage tank unit is not protected
against freezing when the boiler is switched o.
1.4 BOILER CONNECTION UNIT.
e connection unit consisting of all the necessary parts to perform the hydraulic and gas
system connections of the appliance comes as
standard with the boiler.
1.5 GAS ATTACHMENT.
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 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). It is also important to check the dynamic
pressure of the mains (methane or LPG) used
to supply the boiler, which must comply with
the technical standards in force, as insucient
levels may reduce generator output and cause
discomfort to the user. Ensure correct gas cock
connection. e gas supply pipe must be suitably
dimensioned according to current regulations
in order to guarantee correct gas ow to the
boiler even in conditions of max. generator
output and to guarantee appliance efficiency
(technical specications). e coupling system
must conform to technical standards in force..
Combustible gas quality. e appliance has been
designed to operate with gas free of impurities;
otherwise it is advisable to fit special filters
upstream from the appliance to restore the
purity of the gas.
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.
1.6 HYDRAULIC ATTACHMENT.
Important: In order not to void the 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 treatment of the water of the heating and
water system is required, in compliance with the
technical standards in force, in order to protect
the system and the appliance from deposits (e.g.
limescale), slurry or other hazardous deposits.
Water connections must be made in a rational
way. The boiler safety valve outlet must be
connected to a discharge funnel. Otherwise, the
manufacturer 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
automatic lling that is not of its own brand.
In order to meet the system requirements
established by the technical regulation in force
in relation to the 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.
Important: to preserve the life and eciency of the
domestic hot water exchanger it is recommended
to install the “polyphosphate proportioner” kit in
the presence of water whose characteristics can
give rise to scale deposits.
1.7 ELECTRICAL CONNECTION.
The “Avio 24 2 ErP” boiler has an IPX4D
protection rating for the entire appliance.
Electrical safety of the unit is reached when it
is correctly connected to an ecient earthing
system as specied by current safety standards.
Important: Immergas S.p.A. declines any
responsibility for damage or physical injury
caused by failure to connect the boiler to an
ecient earthing 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
leads.
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 connection; , this network
must also have a multi-pole circuit breaker with
class III over-voltage category. When replacing
the power supply cable, contact a qualified
rm (e.g. the Authorised Aer-Sales Technical
Assistance Service).
e power cable must be laid as shown.
In the event of mains fuse replacement on the
control card, use a 3.15A quick-blow fuse. For
the main power supply to the appliance, never
use adapters, multiple sockets or extension leads.
INSTALLATORUSER
MAINTENANCE TECHNICIAN
5
INSTALLATORUSER
1-3 1-4
45
*
58
31
1-5 1-6
1.8 REMOTE CONTROLS AND
ROOM CHRONOTHERMOSTATS
OPTIONAL.
e boiler is prepared for application of room
chronothermostats and external probe. ese
Immergas components are available as separate
kits to the boiler and are supplied on request.
All Immergas chronothermostats are connected
with 2 wires only. Carefully read the user and
assembly instructions contained in the accessory
kit.
• On/O digital 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 operation (with adjustable tempera-
MAINTENANCE TECHNICIAN
ture).
- automatic operation (with set programme).
- forced automatic operation (momentarily
changing the temperature of the automatic
programme).
e chronothermostat is powered by two 1.5V
LR 6 type alkaline batteries.
• ere are two types of Remote Friend Con-
trolV2 (CARV2) (Fig. 1-3) and Mini Digital
Remote Control (Mini CRD) (Fig. 1-4) both
with room chronothermostat functioning.
In addition to the functions described in the
previous point, the control panel enables the
user to keep under control and within reach
all the important information regarding operation of the appliance and the heating system
with the ability to easily act on previously set
parameters, with no need to go to where the appliance is installed. e panel is provided with
self-diagnosis to display any boiler functioning
anomalies. The 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 remote control is
fed directly by the boiler by means of the same 2
wires used for the transmission of data between
boiler and device.
Important: If the system is subdivided into zones
using the relevant kit. the CARV2 must be used
with its climate thermostat function disabled, i.e.
it must be set to On/O mode. e Mini CRD
cannot be used for plants divided into zones.
Electrical connection of the Remote Friend
ControlV2, chronothermostat On/O (Optional) or Mini . e operations described below
must be performed after having removed the
voltage from the appliance. e eventual ther-
mostat or On/O room chronothermostat must
be connected to terminals 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
electronic adjustment card would be damaged.
e eventual Remote Friend ControlV2 must be
connected by means of terminals IN+ and IN- to
terminals 42 and 43, eliminating jumper X40
on the terminal board (in the boiler) respecting
polarity (Fig. 3-2). Connection with the wrong
polarity prevents functioning, but without
damaging the Remote Friend ControlV2. Any
Digital Remote Control must be connected to
terminals 40 e 41 eliminating jumper X40 on
the P.C.B. (in the boiler), (Fig. 3-2). e boiler
works with the parameters set on the Remote
Friend ControlV2 only if the boiler main selector is turned to Domestic/Remote Control
( ). e boiler can only be connected to one
remote control.
Important: If the Remote Friend ControlV2,
Mini Digital Remote Control or any other On/O
chronothermostat is used arrange two separate
lines in compliance with current regulations
regarding electrical systems. Boiler pipes must
never be used to earth the electric or telephone
lines. Ensure elimination of this risk before making the boiler electrical connections.
1.9 EXTERNAL PROBE OPTIONAL.
• External temperature probe (Fig. 1-5).
Refer to the relevant instruction sheet for
positioning the external probe.
This sensor can be connected directly to
the boiler electrical system and allows the
max. system delivery temperature to be
automatically decreased when the outside
temperature increases, in order to adjust the
heat supplied to the system according to the
change in external temperature. e external
probe always operates when connected,
regardless of the presence or type of room
chronothermostat used. The correlation
between system delivery temperature and
outside temperature is determined by the
position of the knob on the boiler control
panel according to the curves shown in the
diagram (Fig. 1-6). e external probe electrical
connection must be made on clamps 38 and 39
on the boiler circuit board (Fig. 3-2).
* (Fig. 1-6) Position of the heating temperature
user adjustment.
6
1.10 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 holes in the walls of the room to
ventilate that go 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 ow is also allowed
indirectly by air intake from adjoining rooms. For
further information relative to ventilation of the
rooms follow that envisioned in the regulation.
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.
1.11 EVACUATION OF COMBUSTION
PRODUCTS: FLUE DUCT AND
BRANCHED MULTIPLE FLUES
e European regulation 813/2013 provides that
this boiler can be installed only to replace similar equipment connected to existing branched
multiple ues.
Connection to branched multiple ues.
Fitting the appliances to a branched multiple ues
takes place by means of ue ducts.
In the event of ttings with pre-existing ues,
these must be in safe and ecient status and 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 current technical regulations.
1.12 FLUE EXHAUST CONTROL DEVICE.
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.
1.13 SYSTEM FILLING.
Once the boiler is connected, proceed with system lling via the lling 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 built-in automatic venting valve
on the circulator. Check if the cap is loose. Open
the radiator air vent valves.
Close vent valves only when water is delivered.
Close the lling valve when the boiler pressure
gauge indicates approx. 1.2 bar.
N.B.: During these operations, turn on the circulating pump at intervals by means of the main
selector switch on the control panel.
1.14 GAS SYSTEM STARTUP.
To start up the system, make reference to the
Standard.
In particular, for new gas systems:
- open windows and doors;
- avoid presence of sparks or naked ames;
- bleed all air from pipelines;
- check that the internal system is properly sealed
according to specications.
1.15 STARTUP OF THE BOILER
IGNITION.
To commission the boiler (the operations listed
below must only be performed by a qualied rm
and without any unauthorised persons):
- check that the internal system is properly sealed
according to the specications set forth by
technical regulations in force;
- ensure 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 on the boiler and ensure 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 is engaged in the
event of gas supply failure and check activation
time;
- check activation of the main circuit-breaker
selector upstream from the boiler and on the
unit.
e boiler must not be started up in the event of
failure to comply with any of the above.
1.16 DOMESTIC HOT WATER BOILER
DEVICE.
e Avio 24 2 ERP boiler is the accumulation
type with a capacity of 45 litres. It contains a large
coiled stainless steel heat exchanger pipe, which
allows to notably reduce hot water production
times. ese boilers built with stainless steel
casing and bottoms, guarantee long duration.
e assembly concepts and welding (T.I.G.) are
implemented to the minimum detail to ensure
maximum reliability.
e lower inspection ange ensures practical
control of the boiler and the coiled heat exchanger and easy internal cleaning.
e domestic water attachments are found on the
ange cover (cold inlet and hot outlet) and also
the magnesium anode holder cap, including the
latter, supplied as standard for internal protection
of the boiler from possible corrosion.
N.B.: every year a skilled technician (e.g. Authorised Aer-sales Service), must check the eciency
of the boiler’s Magnesium Anode. e boiler is
prepared for introduction of the domestic water
re-circulation connection.
INSTALLATORUSER
MAINTENANCE TECHNICIAN
7
1.17 CIRCULATION PUMP.
e boiler is supplied with circulator tted with
speed regulator.
ese settings are suitable for most systems.
In fact, the pump is equipped with electronic
control to set advanced functions. For proper operation one must select the most suitable type of
operation for the system and select a speed in the
available range, with a focus on energy savings.
By-pass Regulation (part. 21 Fig. 1-10). e
boiler is supplied with by-pass closed by 1.5 turns
with respect to all open.
INSTALLATORUSER
If necessary, the by-pass can be regulated to
system requirements from minimum (by-pass
closed) to maximum (by-pass open). Adjust
using a at head screwdriver, turn clockwise to
open the by-pass; turn anti-clockwise to close it.
Display of operation status. During normal
operation the status LED (2) is on green, the four
yellow LEDs (3) indicate circulator absorption
according to the following table:
Circulating pump LED Absorption
G Y Y Y Y
On On O O O
G Y Y Y Y
On On On O O
G Y Y Y Y
On On On On O
0 ÷ 25 %
25 ÷ 50 %
50 ÷ 75 %
Circulating pump LED Description
G Y Y Y Y
On On On O O
G Y Y Y Y
On On On On O
G Y Y Y Y
On On On On On
G Y Y Y Y
On On On O On
Constant curve: the circulator operates maintaining constant speed.
Do not use
Constant curve
speed 2
Constant curve
speed 3 (default)
Constant curve
speed 4
1-7
Key:
1 - Function selection button
2 - Green (G) / red (R) LED
3 - 4 yellow LEDs (Y)
Selection button lock. e button has a feature
that locks its operation to prevent accidental
modications, to lock the control panel it is
necessary to press button (1) longer than 10
seconds (during which the current conguration
ashes), the active lock is signalled by all LEDs of
the control panel ashing. To unlock the button
press again longer than 10 seconds.
Real time diagnostics: in the event of malfunction the LEDs provide information on the
circulator operation status, see table (Fig. 1-8):
G Y Y Y Y
On On On On On
Selection of operating mode. To see the current
operation mode it is sucient to press button
(1) once.
To change operation mode press the button
for between 2 to 10 seconds until the current
conguration ashing, each time the button is
pressed all possible functions are scrolled cyclically. Aer a few seconds without doing any
operation the circulator memorises the selected
mode and goes back to operation display.
Attention: e circulator has various built-in
MAINTENANCE TECHNICIAN
operation modes, however the constant curve
operation mode must be selected according to
the following table.
75 ÷ 100 %
8
1-8
Circulating pump LED
(rst red LED)
R Y Y Y Y
On O O O On
R Y Y Y Y
On O O On O
Description Diagnostics Remedy
Circulator pump blocked
Abnormal situation (the circulator
continues operating).
low power supply voltage
Wait for the circulator to make auto-
The circulator pump cannot restart
automatically due to an anomaly
Voltage o range Check power supply
matic release attempts or manually
release the motor sha acting on the
screw in the centre of the head.
If the anomaly persists replace the
circulator.
INSTALLATORUSER
R Y Y Y Y
On O On O O
Total head available to the plant.
A2
Total head (kPa)
Electrical fault
(Circulator pump blocked)
Capacity (l/h)
e circulator is locked due to power
supply too low or serious malfunction
A4
A3
V4
V2 V3
Check the power supply, if the anomaly
persists replace the circulator
1-9
Key:
V2 = Total head available to the system with
pump at speed 2
V3 = Total head available to the system with
pump at speed 3
V4 = Total head available to the system with
pump at speed 4
A2 = Power absorbed by the pump at speed 2
A3 = Power absorbed by the pump at speed 3
A4 = Power absorbed by the pump at speed 4
Circulator pump absorbed power (W)
1.18 KITS AVAILABLE ON REQUEST.
• Kit of system shuto valves (on request). e
boiler is designed for installation of system
shuto valves to be placed on delivery and
return pipes of the connection assembly. is
kit is particularly useful for maintenance as
it allows the boiler to be drained separately
without having to empty the entire system.
• System zone Kit (on request). If the heating
system is to be divided into several zones (max.
three), in order to interlock them with separate
adjustments and to keep water ow rate high
for each zone, Immergas supplies zone system
kits by request.
• Polyphosphate batching kit (on request). e
polyphosphate dispenser Reduces the formation of lime-scale and preserves the original
heat exchange and domestic hot production
water conditions. e boiler is prepared for
application of the polyphosphate dispenser kit.
e above kits are supplied complete with instructions for assembly and use.
MAINTENANCE TECHNICIAN
9
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