Lamborghini Caloreclima iXinox 24C Troubleshooting guide

cod. 3541N452EN — Rev. 03 - 03/2020
iXinox24C
INSTRUCTIONS FOR USE, INSTALLATION AND MAINTENANCE

iXinox24C
2EN
B
The CE marking certifies that the products meet the essential requirements of the rele-
vant directives in force.
The declaration of conformity may be requested from the manufacturer.
COUNTRIES OF DESTINATION: -
This symbol indicates “CAUTION” and is placed next to all safety warnings. Strictly follow these instructions in order to avoid
danger and damage to persons, animals and things
This symbols calls attention to a note or important notice.
This symbol, which is used on the product, packaging or documents, means that at the end of its useful life, this product must
not be collected, recycled or disposed of together with domestic waste.
Improper management of electric or electronic waste can lead to the leakage of hazardous substances contained in the pro-
duct. For the purpose of preventing damage to health or the environment, users are kindly asked to separate this equipment
from other types of waste and to ask for it to be dealt with by the municipal waste service or dealer under the conditions and
according to the methods set down in national and international laws transposing the Directive 2012/19/EU.
Separate waste collection and recycling of unused equipment helps to save natural resources and to guarantee that this waste
is processed in a manner that is safe for health and the environment.
For more information about how to collect electric and electronic equipment and appliances, please contact your local Council
or Public Authority competent to issue the relevant permits.
cod. 3541N452EN - Rev. 03 - 03/2020
• Read the warnings in this instruction booklet ca-
refully since they provide important information
on safe installation, use and maintenance.
• This instruction booklet is an integral and essen-
tial part of the product and must be kept with
care by the user for future reference.
• If the unit is sold or transferred to another owner
or if it is to be moved, always make sure the
booklet stays with the boiler so that it can be
consulted by the new owner and/or installer.
• Installation and maintenance must be carried
out by professionally qualified personnel, accor-
ding to current regulations and the manufactu-
rer's instructions.
• Incorrect installation or inadequate maintenan-
ce can result in damage or injury. The manufac-
turer declines any liability for damage caused by
errors in installation and use or by failure to fol-
low the instructions provided.
• Before carrying out any cleaning or maintenan-
ce operation, disconnect the unit from the power
supply using the system switch and/or the spe-
cial cut-off devices.
• In case of a fault and/or poor operation, deacti-
vate the unit and do not try to repair it or directly
intervene. Contact professionally qualified per-
sonnel. Any repair/replacement of the products
must only be carried out by qualified personnel
using genuine parts. Failure to comply with the
above can compromise the safety of the unit.
• Periodic maintenance performed by qualified
personnel is essential in order to ensure proper
operation of the unit.
• This unit must only be used for its intended pur-
pose. Any other use is deemed improper and
therefore hazardous.
• After unpacking, check the good condition of the
contents. The packing materials are potentially
hazardous and must not be left within the reach
of children.
• The unit can be used by children aged at least 8
years and by persons with reduced physical,
sensory or mental capabilities, or lacking expe-
rience or the necessary knowledge, only if un-
der supervision or they have received
instructions on its safe use and the related risks.
Children must not play with the unit. Cleaning
and maintenance intended to be done by the
user can be carried out by children aged at least
8 years only if under supervision.
• In case of doubt, do notuse the unit. Contact the
supplier.
• The unit and its accessories must be appropria-
telydisposed of incompliancewithcurrent regu-
lations.
• The images given in this manual are a simplified
representation of the product. In this represen-
tation there may be slight and insignificant diffe-
rences with respect to the product supplied.

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1 Operating instructions ............................................................................................................4
1.1 Introduction.............................................................................................................................................4
1.2 Control panel..........................................................................................................................................4
1.3 Connection to the power supply, switching on and off ...........................................................................5
1.4 Adjustments............................................................................................................................................6
2 Installation..............................................................................................................................10
2.1 General Instructions .............................................................................................................................10
2.2 Place of installation ..............................................................................................................................10
2.3 Plumbing connections ..........................................................................................................................10
2.4 Gas connection ....................................................................................................................................12
2.5 Electrical connections...........................................................................................................................12
2.6 Fume ducts...........................................................................................................................................14
2.7 Condensate drain connection...............................................................................................................20
3 Service and maintenance......................................................................................................21
3.1 Adjustments..........................................................................................................................................21
3.2 Commissioning.....................................................................................................................................32
3.3 Maintenance.........................................................................................................................................33
3.4 Troubleshooting....................................................................................................................................42
4 Technical data and characteristics......................................................................................45
4.1 Dimensions and connections ...............................................................................................................45
4.2 General view ........................................................................................................................................47
4.3 Hydraulic circuit....................................................................................................................................47
4.4 Technical data table .............................................................................................................................48
4.5 Diagrams..............................................................................................................................................50
4.6 Wiring diagram .....................................................................................................................................50

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1. Operating instructions
1.1 Introduction
Dear Customer,
iXinox 24 C is a high-efficiency, low emissions premix condensing heat generator with heat exchanger in s/steel
and incorporated DHW production, using natural gas or LPG and equipped with a microprocessor control system.
The sealed chamber unit is suitable for indoor installation or outdoors in a partially protected place (according to EN
15502) with temperatures to -5°C (-15°C with optional frost protection kit).
1.2 Control panel
fig. 1- Control panel
Panel legend fig. 1
1DHW temperature setting decrease button
2DHW temperature setting increase button
3Heating system temperature setting decrease
button
4Heating system temperature setting increase
button
5Display
6"Sliding Temperature” Menu - Reset button
7Mode selection button: “Winter”, “Summer”,
“Unit OFF”, “ECO”, “COMFORT”
8Eco (Economy) or Comfort mode
9DHW mode
10 Summer mode
12 Multifunction (flashing during exchanger protec-
tion function)
13 Heating
14a Burner lit (flashing during calibration function
and self-diagnosis phases)
14b Appears when a fault has occurred causing the
unit to shut down. To restore unit operation,
press the RESET button (detail 6)
17 External sensor detected (with optional external
probe)
Indication during operation
Heating
A heating demand (generated by the Room Thermo-
stat or Remote Timer Control) is indicated by activa-
tion of the radiator.
The display (detail 12 - fig. 1) shows the actual heating
delivery temperature and, during heating standby ti-
me, the message “d2”.fig. 2
Domestic hot water (DHW)
A DHW demand (generated by drawing hot water) is
indicated by activation of the faucet.
The display (detail 12 - fig. 1) shows the actual DHW
outlet temperature and, during DHW standby time, the
message “d1“.
fig. 3
9
4
1712
8510
3
2
1
14b14a 6713

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Comfort
A Comfort demand (reinstatement of temperature inside the boiler) is indicated by flashing of the Comfort symbol. The
display (detail 12 - fig. 1) shows the actual temperature of the water in the boiler.
Fault
In case of a fault (see cap. 3.4 "Troubleshooting") the display shows the fault code (detail 12 - fig. 1) and during safety
pause times the messages “d3” and “d4”.
1.3 Connection to the power supply, switching on and off
Boiler not electrically powered
B
To avoid damage caused by free-
zing during long idle periods in
winter, it is advisable to drain all
the water from the boiler.
fig. 4- Boiler not electrically powered
Boiler electrically powered
Switch on the power to the boiler.
•During the first 5 seconds the display shows the card software version (fig. 5).
•For the following 20 seconds the display will show FH which identifies the heating system air venting cycle with the fan
running (fig. 6).
•In the next 280 seconds, the venting cycle continues with the fan off (fig. 7).
•Open the gas valve ahead of the boiler
•When the message Fh disappears, the boiler is ready to operate automatically whenever domestic hot water is drawn
or in case of a room thermostat demand
Turning the boiler off and on
To switch modes, press the winter/summer/off button, for about 1 second, in the order indicated in fig. 8.
A = Winter Mode
B = Summer Mode
C = Off Mode
To turn the boiler off, press the winter/summer/off button (detail 7 - fig. 1) repeatedly until the display shows dashes.
fig. 8- Turning the boiler off
fig. 5- Switching on / Software version fig. 6- Vent with fan on fig. 7- Vent with fan off
ABC

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When the boiler is turned off, the circuit board is still
powered. Domestic hot water and heating are disa-
bled. The frost protection system remains activated.
To relight the boiler, press the winter/summer/off
button (detail 7 - fig. 1) twice.
fig. 9
The boiler will be immediately ready in Winter and DHW mode.
B
The frost protection system does not work when the power and/or gas to the unit
are turned off. To avoid damage caused by freezing during long shutdowns in win-
ter, it is advisable to drain all water from the boiler, the DHW circuit and the heating
system water; or drain just the DHW circuit and add a suitable antifreeze to the he-
ating system, as prescribed in sez. 2.3.
NOTE - If the sun symbol does not appear on the display but the multifunction numbers are present, the boiler is
in“Winter” mode.
1.4 Adjustments
Winter/summer switchover
Press the winter/Summer/off button (detail 7 - fig. 1)
until the display shows the Summer symbol (detail 10
- fig. 1): the boiler will only deliver domestic hot water.
The frost protection system remains activated.
fig. 10
To reactivate the Winter mode, press the winter/Sum-
mer/off button (detail 7 - fig. 1) twice.
fig. 11
Heating temperature adjustment
Use the heating buttons (details 3 and 4 - fig. 1) to
adjust the temperature from a min. of 20°C to a max.
of 80°C.
fig. 12

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DHW temperature adjustment
Use the DHW buttons (detail 1 and 2 - fig. 1) to adjust
the temperature from a min. of 40°C to a max. of 55°C.
B
If little water is drawn and/or
with a high water inlet tempera-
ture, the DHW outlet tempera-
ture may differ from the set
temperature.
fig. 13
Room temperature adjustment (with optional room thermostat)
Using the room thermostat, set the temperature required in the rooms. If the room thermostat is not installed, the boiler
will keep the system at the set system delivery setpoint temperature.
Room temperature adjustment (with optional remote timer control)
Using the remote timer control, set the required temperature in the rooms. The boiler will adjust the system water ac-
cording to the required room temperature. For operation with remote timer control, please refer to the relevant instruc-
tion manual.
ECO/COMFORT selection
The unit has a function that ensures a high domestic hot water delivery speed and maximum comfort for the user. When
the device is activated (COMFORT mode), the water contained in the boiler is kept hot, therefore ensuring immediate
availability of hot water on opening the faucet, without waiting times.
The device can be deactivated by the user (ECO mode) by pressing the winter/summer/off button (detail 7 - fig. 1) for
5 seconds. In ECO mode the display activates the ECO symbol (detail 12 - fig. 1). To activate the COMFORT mode,
press the winter/summer/off button again (detail 7 - fig. 1) for 5 seconds.
Sliding Temperature
When the external probe (optional) is installed, the boiler adjustment system works with "Sliding Temperature". In this
mode, the heating system temperature is regulated according to weather conditions, to ensure high comfort and energy
efficiency throughout the year. In particular, as the outside temperature increases the system delivery temperature de-
creases according to a specific "compensation curve".
With the Sliding Temperature adjustment, the temperature set with the heating buttons (details 3 and 4 - fig. 1) becomes
the maximum system delivery temperature. It is advisable to set a maximum value to allow system adjustment throu-
ghout its useful operating range.
The boiler must be adjusted at the time of installation by qualified personnel. However, the user can make any further
adjustments necessary to optimize comfort levels.
Compensation curve and curve offset
Press the reset button (detail 6 - fig. 1) for 5 seconds to access the “Sliding temperature” menu; the display shows “CU”
flashing.
Use the DHW buttons (detail 1 - fig. 1) to adjust the desired curve from 1 to 10 according to the characteristic (fig. 14).
By setting the curve to 0, the sliding temperature adjustment is disabled.
Press the heating buttons (detail 3 - fig. 1) to access parallel curve offset; the display shows “OF” flashing. Use the DHW
buttons (detail 1 - fig. 1) to adjust parallel curve offset according to the characteristic (fig. 15).
Press the heating buttons (detail 3 - fig. 1) to access the menu “shutdown for external temperature”; the display shows
"SH"flashing. Use the DHW buttons (detail 1 - fig. 1) to adjust the shutdown external temperature. If set to 0 the function
is disabled; the range varies from 1 to 40°C. Lighting occurs when the external probe temperature is 2°C lower than the
set temperature.

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Press the reset button (detail 6 - fig. 1) again for 5 seconds to exit the "Sliding Temperature" menu.
If the room temperature is lower than the required value, it is advisable to set a higher order curve and vice versa. Pro-
ceed by increasing or decreasing in steps of one and check the result in the room.
Adjustments from Remote Timer Control
A
If the boiler is connected to the Remote Timer Control (optional), the previously described adjustments are ma-
naged as described in tabella 1.
Table 1
fig. 14- Compensation curves
fig. 15- Example of compensation parallel
curve offset
Heating temperature adjustment Adjustment can be made from the Remote Timer Control menu and the boiler control
panel.
DHW temperature adjustment Adjustment can be made from the Remote Timer Control menu and the boiler control
panel.
Summer/Winter Switchover Summer mode has priority over a possible Remote Timer Control heating demand.
Eco/Comfort selection
On disabling DHW from the Remote Timer Control menu, the boiler selects Economy
mode. In this condition, the eco/comfort button on the boiler panel is disabled.
By enabling DHW from the Remote Timer Control menu, the boiler selects Comfort mode.
In this condition it is possible select one of the two modes on the boiler panel.
Sliding Temperature You can make all the adjustments by using the remote timer control.
20
30
40
50
60
70
80
90
85
20 10 0 -10 -20
1
2
3
4
5
68910 7
20
30
40
50
60
70
80
90
85
20
30
40
50
60
70
80
90
85
1
2
3
4
5
6
8910 7
1
2
3
4
568910 7
OFFSET = 20
OFFSET = 40

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System water pressure adjustment
The filling pressure read on the boiler water gauge
(detail 2 - fig. 16) with system cold must be approx 1.0
bar. If the system pressure falls below minimum va-
lues, the boiler stops and fault F37 is displayed. Pull
out the filling knob (detail 1 - fig. 16) and turn it anti-
clockwise to return it to the initial value. Always close
it afterwards.
Once the system pressure is restored, the boiler will
activate the 300-second air venting cycle indicated on
the display by Fh.
To prevent boiler shutdown, it is advisable to periodi-
cally check the pressure on the gauge with system
cold. In case of a pressure below 0.8 bar, it is advisa-
ble to restore it.
fig. 16- Filling knob
System draining
The drain faucet ring nut is located under the safety
valve inside the boiler.
To drain the system, turn the ring (ref. 1 - fig. 17) coun-
ter-clockwise to open the faucet. Do not use any tools;
use hands only.
To drain only the water in the boiler, first close the
shut-off valves between the system and boiler before
turning the ring.
fig. 17- Safety valve with drain faucet
AB
1
12
1

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2. Installation
2.1 General Instructions
BOILER INSTALLATION MUST ONLY BE PERFORMED BY QUALIFIED PERSONNEL, IN ACCORDANCE WITH
ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE PROVISIONS OF CURRENTLAW, THE PRE-
SCRIPTIONS OF NATIONAL AND LOCAL STANDARDS AND THE RULES OF PROPER WORKMANSHIP.
2.2 Place of installation
B
The combustion circuit is sealed with respect to the place of installation and
therefore the unit can be installed in any room except in a garage. The place
of installation must be sufficiently ventilated to prevent the creation of dan-
gerous conditions in case of even small gas leaks. Otherwise there may be
a risk of suffocation and intoxication or explosion and fire. This safety pre-
caution is required by EEC Directive No. 2009/142 for all gas units, including
so-called sealed chamber units.
The unit is designed to operate in a partially protected place, with a minimum temperature of -5°C. If provided with the
special antifreeze kit, it can be used with a minimum temperature down to -15°C. The boiler must be installed in a shel-
tered place, for instance under the slope of a roof, inside a balcony or in a protected recess.
The place of installation must be free of flammable materials, objects and dusts or corrosive gases.
The boiler is arranged for wall mounting and comes as standard with a hooking bracket. Wall fixing must ensure stable
and effective support for the generator.
A
If the unit is enclosed in a cabinet or mounted alongside, there must be sufficient space for removing the casing
and for normal maintenance activities
2.3 Plumbing connections
Important
B
The safety valve outlet must be connected to a funnel or collection pipe to prevent
water spurting onto the floor in case of overpressure in the heating circuit. Othe-
rwise, if the discharge valve cuts in and floods the room, the boiler manufacturer
cannot be held liable.
B
Before installation, flush all the pipes of the system thoroughly to remove any resi-
duals or impurities that could affect proper operation of the unit.
In case of replacement of generators in existing installations, the system must be
completely emptied and cleaned of any sludge and pollutants. For that purpose
only use suitable guaranteed products for heating systems (see next section), that
do not harm metals, plastics or rubber. The manufacturer declines any liability
for damage caused to the generator by failure to properly clean the system.
Make the connections to the respective points (see fig. 57, fig. 58 and fig. 59) and to the symbols given on the unit.

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Plumbing kit (optional)
A kit of fittings (code 012043W0) for the hydraulic con-
nection of the boiler to the wall is available on request.
fig. 18- Plumbing kit
Antifreeze system, antifreeze fluids, additives and inhibitors
When necessary, antifreeze fluids, additives and inhibitors can be used only if the manufacturer of such fluids or addi-
tives guarantees that they are suitable and do not cause damage to the exchanger or other components and/or mate-
rials of the boiler and system. Do not use generic antifreeze fluids, additives or inhibitors that are not specific for use in
heating systems and compatible with the materials of the boiler and system.
System water characteristics
B
iXinox 24 C boilers are suitable for installation in heating systems with non-signifi-
cant entry of oxygen (ref. systems "case I" EN14868). A physical separator (e.g.
plate heat exchanger) must be provided in systems with continuous entry of oxy-
gen (e.g. underfloor systems without antidiffusion pipes or open vessel), or inter-
mittent (less than 20% of system water content).
The water within a heating system must have the characteristics required by UNI
8065, and comply with laws and regulations in force and the provisions of
EN14868 (protection of metallic materials against corrosion).
Thefillingwater(firstfilling and subsequentreplenishment) must be clear, with har-
dness below 15°F and treated with suitable chemical conditioners against the ini-
tiation of corrosion, that are not aggressive on metals and plastics, do not develop
gases and, in low-temperature systems, do not cause proliferation of bacterial or
microbial masses.
The water in the system must be periodically checked (at least twice a year during
the season when the systems are used, as required by UNI8065) and have: pos-
sibly a clear appearance, hardness below 15°F for new systems or 20°F for exi-
sting systems, pH above 7 and below 8.5, iron content (Fe) below 0.5 mg/l, copper
content (Cu) below 0.1 mg/l, chloride content below 50mg/l, electrical conductivity
below 200 µs/cm, and must contain chemical conditioners in a concentration suf-
ficient to protect the system for at least one year. Bacterial or microbial loads must
not be present in low temperature systems.
Only use conditioners, additives, inhibitors and antifreeze liquids declared by the
producer suitable for use in heating systems and that do not cause damage to the
heat exchanger or other components and/or materials of the boiler and system.
Chemical conditioners must ensure complete deoxygenation of the water, contain
specific protection for yellow metals (copper and its alloys), anti-fouling agents for

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scale, neutral pH stabilizers and, in low-temperature systems, specific biocides for
use in heating systems.
Recommended chemical conditioners:
SENTINEL X100 and SENTINEL X200
FERNOX F1 and FERNOX F3
The unit is equipped with a frost protection system that activates the boiler in hea-
ting mode when the system delivery water temperature falls below 6°C. The device
is not active if the power and/or gas supply to the unit is turned off. If necessary,
for system protection use a suitable antifreeze liquid that meets the same require-
ments as set out above and provided for by Standard UNI 8065.
In the presence of adequate chemical/physical system and feed water treatments
and related high cyclicity controls able to ensure the required parameters, for indu-
strial process applications theproductcan be installed in open-vessel systems with
vessel hydrostatic height able to ensure compliance with the minimum operating
pressure indicated in the product technical specifications.
The presence of deposits on the boiler exchange surfaces due to non-com-
pliance with the above requirements will involve non-recognition of the war-
ranty.
Frost protection kit for outdoor installation (optional - 013022X0)
In case of installation outdoors in a partially protected place, for temperatures below -5°C and down to -15°C, the boiler
must be fitted with the special frost protection kit. For proper installation, please refer to the instructions in the kit.
2.4 Gas connection
B
Before making the connection, ensure that the unit is arranged for operation
with the type of fuel available.
The gas must be connected to the corresponding union (see fig. 57) in con-
formity with current regulations, with a rigid metal pipe or with a continuous
flexible s/steel tube, installing a gas cock between the system and boiler.
Make sure that all the gas connections are tight. Otherwise there may be a
risk of fire, explosion or suffocation.
2.5 Electrical connections
IMPORTANT
B
BEFORE CARRYING OUT ANY OPERATION THAT REQUIRES REMOVING
THE CASING, DISCONNECT THE BOILER FROM THE ELECTRIC MAINS
WITH THE MAIN SWITCH.
NEVER TOUCH THE ELECTRICAL COMPONENTS OR CONTACTS WITH THE
MAIN SWITCH TURNED ON! DANGER OF ELECTRIC SHOCK WITH RISK OF
INJURY OR DEATH!
B
The unit must be connected to an efficient grounding system in accordance with ap-
plicable safety regulations. Have the efficiency and suitability of the grounding sy-
stem checked by professionally qualified personnel; the Manufacturer declines any
liability for damage caused by failure to earth the system.

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The boiler is prewired and provided with a three-pole cable, without a plug, for con-
nection to the electric line. The connections to the grid must be made with a per-
manent connection and equipped with a bipolar switch whose contacts have a
minimum opening of at least 3 mm, interposing fuses of max. 3A between the boi-
ler and the line. Make sure to respect the polarities (LINE: brown wire / NEUTRAL:
blue wire / GROUND: yellow-green wire) in the connections to the electric line.
B
The unit's supply cable MUST NOT BE REPLACED BY THE USER. If the cable
gets damaged, turn the unit off and have the cable replaced only by profes-
sionally qualified personnel. In case of replacement, only use cable “HAR H05
VV-F” 3x0.75 mm2 with max. external diameter of 8 mm.
Room thermostat (optional)
B
ATTENTION: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE CON-
TACTS. CONNECTING 230V TO THE ROOM THERMOSTAT TERMINALS
WILL PERMANENTLY DAMAGE THE PCB.
When connecting a time control or timer, do not take the power supply for such de-
vices from their cutoff contacts. Their power supply must be via a direct connection
from the grid or with batteries, depending on the kind of device.
Accessing the electrical terminal block and fuse
Remove the front panel ( *** 'Opening the front panel' on page 33 ***) to access the terminal block (M) and fuse (F) by
proceeding as follows (fig. 19 and fig. 20). The terminals indicated in fig. 20 must be with voltage-free contacts
(not 230V). The arrangement of the terminals for the various connections is also given in the wiring diagram in fig. 63.
fig. 19
fig. 20
F
M
72
139
123456
138
A
LN

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Variable output relay LC32 card (optional - 043011X0)
The variable output relay LC32 consists of a small card with a changeover of free contacts (closed means contact
between C and NO). Operation is managed by the software.
For installation, carefully follow the instructions provided in the kit package and on the wiring diagram of fig. 63.
To use the desired function, refer to the tabella 2.
Table 2- Settings LC32
ON/OFF (A fig. 20) configuration
Table 3- Switch A setting
2.6 Fume ducts
B
THE BOILER MUST BE INSTALLED IN PLACES THAT MEET THE FUNDAMEN-
TAL REQUIREMENTS FOR VENTILATION. OTHERWISE THERE IS A DAN-
GER OF SUFFOCATION OR INTOXICATION.
READ THE INSTALLATION AND MAINTENANCE INSTRUCTIONS BEFORE
INSTALLING THE UNIT.
ALSO FOLLOW THE DESIGN INSTRUCTIONS.
IN CASE OF PRESSURES ABOVE 200 Pa INSIDE THE FUME EXHAUST PI-
PES, CLASS "H1” FLUES MUST BE USED.
Parameter b07 Function LC32 Action LC32
0Manages a secondary gas valve (default) The contacts are closed when the gas valve (in the boiler) is
powered
1Use as an alarm output (warning light comes on) The contacts are closed when there is an error condition
(generic)
2Manages a water loading valve The contacts are closed until the water pressure in the hea- ting circuit is restored to the normal level (after manual or
automatic topping up)
3Manages a solar 3-way valve The contacts are closed when the DHW mode is active
Manages a Legionella pump (only with b01=2) The contacts are closed when the Legionella protection is
running
4Manages a second heating pump The contacts are closed when the heating mode is active
5Use as an alarm output (warning light goes off) The contacts are opened when there is an error condition
(generic)
6Indicates ignition of the burner The contacts are closed when the flame is present
7Manages the trap heater The contacts are closed when the frost protection mode is
active
DHW configuration Parameter b06
b01 = 1 o 3
b06=0 Contact open disables DHW and re-enables it if closed.
b06=1 Contact open disables heating and displays F50. Contact closed enables heating.
b06=2 The contact acts as a room thermostat.
b06=3 Contact open displays F51 and the boiler continues to operate.
It is used as an alarm.
b06=4 The contact acts as a limit thermostat, if open it displays F53 and turns off the request.
b01 = 2 o 4
b06=0 Contact open puts the boiler in ECO mode.
Contact closed puts the boiler in COMFORT mode.
b06=1 Contact open disables heating and displays F50.
Contact closed enables heating.
b06=2 The contact acts as a room thermostat
b06=3 Contact open displays F51 and the boiler continues to operate.
It is used as an alarm.
b06=4 The contact acts as a limit thermostat, if open it displays F53 and turns off the request.

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Important
The unit is “type C” with sealed chamber and forced draught; the air inlet and fume outlet must be connected to one of
the following extraction/suction systems. Before installation, check and carefully observe the above prescriptions. Also,
comply with the provisions concerning the positioning of wall and/or roof terminals and the minimum distances from win-
dows, walls, vents, etc.
Installation type C10
In case of flues under pressure in a collective flue, before installation and at subsequent maintenance operations, close
the fume discharge duct coming from the flue. OTHERWISE THERE IS DANGER OF SUFFOCATION DUE TO PRO-
DUCTS OF COMBUSTION ESCAPING INTO THE BOILER ROOM.
Installation of the boiler according to type C10 must be carried out by specialist personnel doing the calcula-
tions required by current regulations in compliance with the maximum positive pressure of the flue and the boi-
ler.
Connection with coaxial pipes
fig. 21 - Examples of connection with coaxial pipes ( = Air / = Fumes)
For coaxial connection, fit the unit with one of the following starting accessories. For the wall hole dimensions, refer to
the figure on the cover. Any horizontal sections of the fume exhaust must be kept sloping slightly towards the boiler, to
prevent possible condensate from flowing back towards the outside and causing dripping.
fig. 22- Starting accessories for coaxial ducts
Table 4- Max. length coaxial ducts
Coaxial 60/100 Coaxial 80/125
Max. permissible length (horizontal) 7 m 28 m
Max. permissible length (vertical) 8 m
Reduction factor 90° bend 1 m 0.5 m
Reduction factor 45° bend 0.5 m 0.25 m
C
1X
C
1X
C
3X
C
3X
C
3X
C
1X
041006X0 041084X0041083X0
Ø 80
Ø 127
120
147
Ø 100
Ø 60
Ø 60
Ø 100

iXinox24C
16 EN
cod. 3541N452EN - Rev. 03 - 03/2020
Connection with separate pipes
fig. 23- Examples of connection with separate pipes ( = Air / = Fumes)
Table 5 - Typology
For the connection of separate ducts, fit the unit with the following starting accessory:
fig. 24- Starting accessory for separate ducts
Before installation, make sure the maximum permissible length has not been exceeded, by means of a simple calcula-
tion:
1.Establish the layout of the system of split flues, including accessories and outlet terminals.
2.Consult tabella 7 and identify the losses in m
eq
(equivalent meters) of every component, according to the installation
position.
3.Check that the sum total of losses is less than or equal to the maximum permissible length in tabella 6.
Table 6- Max. length separate ducts
Type Description
C1X Wall horizontal exhaust and intake. The inlet/outlet terminals must be concentric or close enough to be undergo similar wind
conditions (within 50 cm)
C3X Roof vertical exhaust and intake. Inlet/outlet terminals like for C12
C5X Wall or roof exhaust and intake separate or in any case in areas with different pressures. The exhaust and intake must not be
positioned on opposite walls.
C6X Intake and exhaust with separately certified pipes (EN 1856/1)
B2X Intake from installation room and wall or roof exhaust
IMPORTANT - THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION
Max. permissible length 80 m
eq
C5x
C
3x
B 2x
C 1x
max 50 cm
80
100
80
60
cod. 041082X0

iXinox24C
17EN
cod. 3541N452EN - Rev. 03 - 03/2020
Table 7- Accessories
Losses in m
eq
Air
intake Fume exhaust
Vertical Horizontal
Ø 80
PIPE 1 m M/F 1KWMA83W 1.0 1.6 2.0
BEND 45° M/F 1KWMA65W 1.2 1.8
90° M/F 1KWMA01W 1.5 2.0
PIPE SECTION with test point 1KWMA70W 0.3 0.3
TERMINAL air, wall 1KWMA85A 2.0 -
fumes, wall with antiwind 1KWMA86A - 5.0
FLUE Split air/fumes 80/80 010027X0 - 12.0
Fume outlet only Ø80 010026X0 +
1KWMA86U -4.0
Ø 60
PIPE 1 m M/F 1KWMA89W 6.0
BEND 90° M/F 1KWMA88W 4.5
REDUCTION 80/60 041050X0 5.0
TERMINAL fumes, wall with antiwind 1KWMA90A 7.0
Ø 50
PIPE 1 m M/F 041086X0 12
BEND 90° M/F 041085X0 9
REDUCTION 80/50 041087X0 10
ATTENTION: CONSIDER THE HIGH PRESSURE LOSSES OF Ø50 and Ø60 ACCESSORIES; USE
THEM ONLY IF NECESSARY AND AT THE LAST FUME EXHAUST SECTION.

iXinox24C
18 EN
cod. 3541N452EN - Rev. 03 - 03/2020
Use of Ø50 and Ø60 flexible pipe (for ducting only)
The chart includes the starting accessories code 041087X0 for Ø50 and code 041050X0 for Ø60.
Up to 4 m. of Ø80 mm flue can be used between the boiler and the passage with reduced width (Ø50 or Ø60), and up
to 4 m. of Ø80 mm flue on the intake (with max. length of Ø50 and Ø60 flues).
To use this width, follow the instructions below.
Access the SC menu (follow the instructions given in par. “"Sc" - Combustion Control Parameters Menu” on page 29)
and bring the parameter SC04 to a value corresponding to the length of the flue used.
fig. 26- Chart for flue parameter choice
fig. 25
A = Ø50 - 28 m MAX
Ø60 - 78 m MAX
max 4 m
Ø80
max 4 m
Ø80
A
m
SC04
0 1020304050607080
12
10
8
6
4
2
0
13
FLEX Ø50
FLEX Ø60

iXinox24C
19EN
cod. 3541N452EN - Rev. 03 - 03/2020
Connection to collective flues
fig. 27- Examples of connection to collective flues ( = Air / = Fumes)
fig. 28- Connection examples - system C10 and C11 ( = Air / = Fumes)
C 8X C 2X
C 4X
C93C93
C 11
C 11
C 10
C 10

iXinox24C
20 EN
cod. 3541N452EN - Rev. 03 - 03/2020
Table 8- Typology
If the iXinox 24 C boiler is to be connected to a collective flue or a single flue with natural draught, the flue or chimney
must be expressly designed by professionally qualified technical personnel in conformity with the current regulations
and be suitable for sealed chamber units equipped with fan.
ONLY FOR THE ITALIAN MARKET
According to Art. 5 Para. 2,. f) and g) of Min. Decree 37/08, gas systems, chimneys, flues and smoke systems
with a capacity of over 50 kW and in any case all multiple flues installed in Italy must be designed by a Profes-
sional registered in the appropriate professional registers.
Backflow preventer valve
The iXinox 24 C boiler is fitted as standard with a clapet non-return valve (backflow preventer) therefore it can be con-
nected, only if running on G20 gas, to collective flues in positive pressure.
In case of C10 type boiler installation, apply the white adhesive label (included in the document envelope ac-
companying the unit) on the FRONT CASING IN A CLEARLY VISIBLE PLACE.
After installation, check the tightness of the gas circuit and fumes.
OTHERWISE THERE IS A DANGER OF SUFFOCATION DUE TO THE EMISSION OF COMBUSTION FUMES.
2.7 Condensate drain connection
IMPORTANT
The boiler has an internal trap for draining condensate. Install the hose “B” by pressing it into place. Before commis-
sioning, fill the trap with approx. 0.5 L of water and connect the hose to the disposal system.
Drains connected to the drainage system must be resistant to acidic condensate.
If the condensate drain is not connected to the waste water drainage system, a neutralizer must be installed.
B
ATTENTION: THE UNIT MUST NEVER BE OPERATED WITH THE TRAP EMP-
TY!
OTHERWISE THERE IS A DANGER OF SUFFOCATION DUE TO THE EMIS-
SION OF COMBUSTION FUMES.
THE CONDENSATE DRAIN MUST BE CONNECTED TO THE DRAINAGE SY-
STEM IN SUCH A WAY THAT THE LIQUID CONTAINED CANNOT FREEZE.
fig. 29- Condensate drain connection
Type Description
C10 Unit connected through its ducts to a system of common flue pipes under pressure obtained in the structure
C11 Unit connected through its ducts to a system of common flue pipes under pressure
C2X Intake and exhaust in common flue (intake and exhaust in same flue)
C4X Intake and exhaust in common and separate flues, but undergoing similar wind conditions
C8X Exhaust in single or common flue and wall intake
B3X Intake from installation room by means of concentric duct (that encloses the exhaust) and exhaust in common flue with natural
draft
IMPORTANT- THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION
C93 Exhaust to a vertical terminal and intake from existing flue.
0,5lt
B