Baxi LUNA DUO-TEC IN+ Guide

A
en BUILT IN CONDENSING GAS WALL-HUNG BOILERS
Instructions manual for users and tters

7689490.01 (1-09/17) 2
User & Installer (en)
Dear Customer,
Our company is condent our new product will meet all your requirements. Buying one of our products guarantees all your
expectations: good performance combined with simple and rational use.
Please do not put this booklet away without reading it rst: it contains useful information for the correct and efcient use of your
product.
Our company declares that these products are marked in compliance with the essential requirements of the
following Directives:
- Gas Directive 2009/142/EC
- Efciency Directive 92/42/EEC
- Electromagnetic Compatibility Directive 2014/30/EU
- Low Voltage Directive 2014/35/EU
- Ecodesign directive 2009/125/EC
- Energy labelling directive 2010/30/EU (for boilers with Power<70kW)
- Ecodesign regulation (EU) No 813/2013
- Energy labelling regulation (EU) No 811/2013 (for boilers with Power<70kW)
Our company, constantly striving to improve the products, reserves the right to modify the details given in this documentation
at any time and without notice. These Instructions are only meant to provide consumers with use information and under no
circumstance should they be construed as a contract with a third party.
The appliance can be used by children aged 8 or over and by people with reduced
physical, sensory or mental faculties, or who do not have the required experience
or knowledge, provided they are supervised or have received instructions on using
the appliance safely and understanding its intrinsic hazards. Children must not play
with the appliance. The cleaning and maintenance operations reserved to the user
must not be performed by unsupervised children.

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User & Installer (en)
7689490.01 (1-09/17)
CONTENT
DESCRIPTION OF SYMBOLS .....................................................................................................................................................................4
SAFETY WARNINGS ....................................................................................................................................................................................4
GENERAL PRECAUTIONS .........................................................................................................................................................................5
ENERGY-SAVING TIPS ................................................................................................................................................................................5
1. COMMISSIONING THE BOILER ..................................................................................................................................................................6
1.1 SYMBOL MEANING ...............................................................................................................................................................................7
1.2 DESCRIPTION OF BUTTON (SUMMER - WINTER - HEATING ONLY - OFF) ......................................................................................7
1.3 DESCRIPTION OF BUTTON (AUTOMATIC-MANUAL-OFF) ...............................................................................................................7
1.4 ROOM AND DOMESTIC HOT WATER (D.H.W.) TEMPERATURE ADJUSTMENT .....................................................................................7
1.5 PROGRAMMING (PROGR) ..........................................................................................................................................................................7
1.6 PROGRAMMING HEATING MODE OPERATION TIMES ............................................................................................................................8
1.7 PROGRAMMING DHW MODE OPERATION TIMES ...................................................................................................................................9
1.8 ECONOMY - COMFORT FUNCTION .............................................................................................................................................9
1.9 SHOWER FUNCTION ..................................................................................................................................................................................9
1.10 TEMPERATURE VALUES MODIFICATION BY PRESSING THE BUTTON ....................................................................................10
1.11 PROGRAMMABLE SWITCHING TIME FUNCTION (BUTTON )..............................................................................................................10
2. PROLONGED SHUTDOWN. ANTI-FREEZE PROTECTION .......................................................................................................................10
3. GAS CONVERSION .....................................................................................................................................................................................11
4. TROUBLESHOOTING ..................................................................................................................................................................................11
5. SWITCHING OFF THE BOILER ...................................................................................................................................................................12
6. FILLING THE SYSTEM .................................................................................................................................................................................12
7. ROUTINE MAINTENANCE INSTRUCTIONS ...............................................................................................................................................12
INSTRUCTIONS PRIOR TO INSTALLATION ...............................................................................................................................................13
8. INSTALLING THE BOILER ...........................................................................................................................................................................13
CONTENTS OF PACK ..................................................................................................................................................................................13
8.1 RECESSED INSTALLATION OUTDOORS ...................................................................................................................................................14
8.2 WALL-MOUNTED INSTALLATION OUTDOORS IN PARTIALLY SHELTERED AREAS ..............................................................................14
8.3 WALL-MOUNTED OPEN AIR INSTALLATION OUTDOORS .......................................................................................................................15
9. FILLING THE SYSTEM .................................................................................................................................................................................15
10. INSTALLING THE DUCTS ............................................................................................................................................................................16
10.1 CONCENTRIC DUCTS .................................................................................................................................................................................17
10.2 SEPARATE DUCTS ......................................................................................................................................................................................17
SEPARATE DUCTS (TYPE B23) ..................................................................................................................................................................17
SEPARATE DUCTS WITH SHELTER KIT (TYPE B23) ................................................................................................................................17
11. ELECTRICAL CONNECTIONS .....................................................................................................................................................................18
11.1 INSTALLING THE REMOTE CONTROL ON THE WALL .............................................................................................................................19
11.2 CONNECTING TO A ZONE SYSTEM ..........................................................................................................................................................20
11.3 CONNECTING THE ROOM THERMOSTAT .................................................................................................................................................21
11.4 ACCESSORIES NOT INCLUDED IN THE SUPPLY .....................................................................................................................................21
12. SPECIAL FUNCTIONS .................................................................................................................................................................................22
12.1 INITIAL IGNITION .........................................................................................................................................................................................22
12.2 SYSTEM GAS EXTRACTION FUNCTION ...................................................................................................................................................22
12.3 CHIMNEY SWEEPER ...................................................................................................................................................................................23
12.4 COMBUSTION TEST (CO2) ..........................................................................................................................................................................23
COMBUSTION ADJUSTMENT FUNCTION (CO2%) ....................................................................................................................................23
13. GAS VALVE ...................................................................................................................................................................................................24
13.1 GAS CONVERSION METHODS ..................................................................................................................................................................24
14. BOILER INFORMATION MENU ...................................................................................................................................................................24
15. PARAMETERS SETTING .............................................................................................................................................................................25
15.1 ADJUSTING MAXIMUM HEATING POWER ................................................................................................................................................27
16. TROUBLESHOOTING SERVICE FAULTS ...................................................................................................................................................27
17. ADJUSTMENT AND SAFETY DEVICES ......................................................................................................................................................29
18. PUMP CAPACITY/ HEAD .............................................................................................................................................................................29
19. POSITIONING THE ELECTRODES .............................................................................................................................................................29
20. ANNUAL SERVICING ...................................................................................................................................................................................30
20.1 HYDRAULIC UNIT ........................................................................................................................................................................................30
20.2 CLEANING THE FILTERS ............................................................................................................................................................................30
20.3 DISMOUNTING THE WATER-WATER HEAT EXCHANGER .......................................................................................................................30
20.4 REPLACEMENT OF PARTS .........................................................................................................................................................................31
AUTOMATIC CALIBRATION FUNCTION .....................................................................................................................................................31
21. DISMANTLING, DISPOSAL AND RECYCLING ...........................................................................................................................................31
22. TECHNICAL SPECIFICATIONS ...................................................................................................................................................................32
23. TECHNICAL PARAMETERS ........................................................................................................................................................................33
24. PRODUCT FICHE .........................................................................................................................................................................................34

7689490.01 (1-09/17) 4
User & Installer (en)
DESCRIPTION OF SYMBOLS
WARNING
Risk of damage to, or malfunction of the appliance. Pay special attention to the warnings concerning
danger to people.
DANGER OF BURNS
Wait for the appliance to cool down before working on the parts exposed to heat.
DANGER - HIGH VOLTAGE
Live components - electrocution hazard.
DANGER OF FREEZING
Possible formation of ice due to low temperatures.
IMPORTANT INFORMATION
Information to read with particular care as it is useful for the correct operation of the boiler.
GENERIC PROHIBITION
It is forbidden to do/use the things indicated alongside the symbol.
SAFETY WARNINGS
SMELL OF GAS
• Switch off the boiler.
• Do not activate any electrical device (such as switching on the light).
• Put out any naked ames and open the windows.
• Call an Authorised Service Centre.
SMELL OF COMBUSTION FUMES
• Switch off the boiler.
• Open all the doors and windows to ventilate the room.
• Call an Authorised Service Centre.
FLAMMABLE MATERIAL
Do not use and/or store highly ammable material (thinners, paper, etc.) near the boiler.
SERVICING AND CLEANING THE BOILER
Switch off the boiler before working on it.
The appliance is not intended to be used by persons with reduced physical, sensory or mental capacities, or who lack
experience or knowledge, unless, through the mediation of a person responsible for their safety, they have had the benet
of supervision or of instructions on the use of the appliance.
Frost protection can be enabled only when the appliance is powered up, the supply of gas is active and the pressure in the
system is within the recommended range. All the shut-off valves of the boiler must remain open. Our company cannot accept
liability when these requirements are not observed.
There must be a gas shut-off valve at a point upstream of the appliance where it can be found and accessed with ease.

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User & Installer (en)
7689490.01 (1-09/17)
GENERAL PRECAUTIONS
This boiler has been designed to heat water to a temperature lower than boiling point at atmospheric pressure. It must be
connected to a central heating system and to a domestic hot water supply system according to its performance and power output.
Before having the boiler installed by a qualied service engineer, make sure the following operations are performed:
• Make sure that the boiler is adjusted to use the type of gas delivered by the gas supply. To do this, check the markings on the
packaging and the data label on the appliance.
• Make sure that the ue terminal draft is appropriate, that the terminal is not obstructed and that no exhaust gases from other
appliances are expelled through the same ue duct, unless the latter has been specially designed to collect exhaust gas from
more than one appliance, in compliance with current laws and regulations.
• Make sure that, if the boiler is connected to existing ue ducts, these have been thoroughly cleaned as residual products of
combustion may detach from the walls during operation and obstruct the ow of fumes.
• To ensure correct operation and maintain the warranty, observe the following precautions:
1. DHW circuit
1.1 If the water is harder than 20 °F (1 °F = 10 mg calcium carbonate per litre of water), install a polyphosphate dispenser or an
equivalent treatment system, compliant with current regulations.
1.2 Thoroughly ush the system after installation of the appliance and before use.
1.3 The materials used for the DHW circuit comply with Directive 98/83/EC.
2. Heating circuit
2.1 New system: Before installing the boiler, the system must be cleaned and ushed to eliminate residual thread-cutting swarf,
solder and any solvents, using suitable off-the-shelf non-acid and non-alkaline products that do not damage metal, plastic and
rubber parts. To protect the system from scale, use inhibitors such as SENTINEL X100 and FERNOX protector for heating circuits.
Use these products in strict compliance with the manufacturers' instructions.
2.2 Existing system: Before installing the boiler, drain the system and clean it to remove sludge and contaminants, using suitable
proprietary products. Recommended cleaning products are: SENTINEL X300 or X400 and FERNOX regenerator for heating
circuits. Use these products in strict compliance with the manufacturers' instructions. Remember that the presence of foreign
bodies in the heating system can adversely affect boiler operation (e.g. overheating and excessive noise of the heat exchanger).
Initial lighting of the boiler must be carried out by an authorised Service Engineer who must rst ensure that:
• The rated data correspond to the supply (electricity, water and gas) data.
• That the installation complies with current regulations.
• The appliance is correctly connected to the power supply and earthed.
Failure to observe the above will render the warranty null and void. Prior to commissioning, remove the protective plastic
coating from the boiler. Do not use any tools or abrasive detergents to do this as you may damage the painted surfaces.
Do not leave any packaging (plastic bags, polystyrene, etc.) within the reach of children as they are a potential source of danger.
ENERGY-SAVING TIPS
Adjustment in the heating mode
Adjust the boiler ow temperature depending on the kind of system. For systems with radiators, set a maximum heating water
ow temperature of approximately 60°C and increase this value if the required room temperature is not reached. For systems with
radiant oor panels, do not exceed the temperature indicated by the system designer. Use the External Sensor and/or Control
Panel to automatically adjust the ow temperature to atmospheric conditions or the indoor temperature. This ensures that no more
heat than that effectively necessary is produced. Adjust the room temperature without overheating the rooms. Every extra degree
centigrade means consuming approximately 6% more. Also room ambient temperature depending on how the rooms are used.
For example, the bedroom or the least used rooms can be heated to a lower temperature. Use the programmable timer and set the
night-time room temperature at approximately 5°C lower than that during the day. There is no appreciable saving to be achieved
by setting it any lower. Only in case of a prolonged absence, such as a holiday, should the temperature setpoint be lowered. Do
not cover radiators as this prevents the air from circulating correctly. Do not leave the windows partially open to ventilate the rooms
but open them completely for a short period.
Domestic hot water
Setting the domestic hot water at the required temperature without mixing it with cold water saves a lot of money. Additional
heating wastes energy and creates additional scale.
BAXI a leading European manufacturer of hi-tech boilers and heating systems, has developed
CSQ-certied quality management (ISO 9001), environmental (ISO 14001) and health and
safety (OHSAS 18001) systems. This means that BAXI S.p.A. includes among its objectives the
safeguarding of the environment, the reliability and quality of its products, and the health and
safety of its employees.
Through its organisation, the company is constantly committed to implementing and improving
these aspects in favour of customer satisfaction.

7689490.01 (1-09/17) 6
USER Section (en)
1. COMMISSIONING THE BOILER
To correctly light the boiler proceed as follows:
• Provide power supply to the boiler.
• Open the gas cock.
• Press the button (following gure) to set the gas boiler mode as described in section "DESCRIPTION OF BUTTON
(Summer - Winter - Heating only - Off)".
If summertime mode is setting , the boiler will light only during a D.H.W. demand.
• To adjust the CH and D.H.W. temperature, press the +/- respective buttons as described in section "ROOM AND DOMESTIC
HOT WATER (D.H.W.) TEMPERATURE ADJUSTMENT".
a
b
c
d
e
f
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1 2
3
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7
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1Information/Programming button 5Setting programmed operation in heating mode
Manual/Automatic/Off
2Timing function 6Economy-Comfort button
3Central Heating temperature regulation 7Enabling Summer-Winter-Heating only-Off
4Conrmation button 8Domestic Hot Water temperature regulation
aD.H.W. mode lPcb (boiler) parameters
bCH mode mBurner lighted
cStandby nFault in progress
dTiming mode oModulating ame level (boiler power level)
eManual mode pCommunication with the gas boiler in progress
fDelayed mode qReduced setpoint temperature mode
gTime format / displaying information rComfort setpoint temperature mode
hWeek days sTime switch program histogram
iBattery level

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USER Section (en)
7689490.01 (1-09/17)
1.1 SYMBOL MEANING
There are 4 power levels displayed during boiler operation, relevant to the gas boiler modulation, as shown in gure to side.
1.2 DESCRIPTION OF BUTTON (Summer - Winter - Heating only - Off)
Press this button to set the following boiler operation modes:
• SUMMER
• WINTER
• HEATING ONLY
• OFF
In SUMMER mode the symbol is shown on the display. The boiler only meets DHW demands; heating mode is not enabled
(frost protection function is enable).
In WINTER mode the symbols are shown on the display. The boiler meets DHW and heating mode demands (frost
protection function activated).
In HEATING ONLY mode the symbol is shown on the display. The boiler only meets heating mode demands (frost protection
function is enable).
If OFF is selected, neither of the two symbols is displayed. In this mode only the frost protection function is enabled and
any other demands in DHW or heating mode are not met.
1.3 DESCRIPTION OF BUTTON (AUTOMATIC-MANUAL-OFF)
By pressing this button it is possible to set one of the following Heating modes:
AUTO - MANUAL - OFF as describe below.
AUTO (displayed symbol )
The Heat request depends on the type of the “Time Programs” set (COMFORT room temperature " " or reduced room temperature
" "). See section "PROGRAMMING HEATING MODE OPERATION TIMES" to set the programming heating mode.
MANUAL (displayed symbol )
This function disables the “Time Programming” in Heating mode. Press the +/- button to set the room temperature value.
OFF (displayed symbol )
This function disables the Heating mode and the display shows the symbol (the frost protection is enabled).
1.4 ROOM AND DOMESTIC HOT WATER (D.H.W.) TEMPERATURE ADJUSTMENT
The room and D.H.W. temperature adjustment are carried out by pressing the relative +/- buttons (see gure in section
"COMMISSIONING THE BOILER").
When the burner is lighted the display shows the symbol as described in section " SYMBOL MEANING".
CENTRAL HEATING (CH)
During a CH mode, the display shows a CH symbol and the room temperature value °C.
During a temperature regulation, the display shows “AMB”.
DOMESTIC HOT WATER (D.H.W.)
During a D.H.W. request, the display shows a D.H.W. symbol and the room temperature value (°C).
During a temperature regulation, the display shows "HW SP".
if an external water tank is connected to the gas boiler, during a domestic hot water request, the display shows a symbol
and the room temperature value (°C).
1.5 PROGRAMMING (PROGR)
SETTING THE DATE-TIME
Press the IP button: the display shows (briey) the message PROGR and the time starts ashing.
If no button is pressed the function ends automatically after approx. 1 minute.
• Use the buttons +/- to set the hour;
• Press the OK button;
• Use the buttons +/- to set the minutes;
• Press the OK button;
• Use the buttons +/- to set the day of the week "Day" (1…7 corresponding to Monday…Sunday);
Press the IP button to exit DATE-TIME setting.

7689490.01 (1-09/17) 8
USER Section (en)
1.6 PROGRAMMING HEATING MODE OPERATION TIMES
To enable the function, press the button (the display shows the symbol).
Time period programming allows the setting of boiler automatic operation in heating mode in xed time slots and on xed days of
the week. Boiler operation settings can be made for single days or groups of consecutive days.
1.6.1 Single days
Four time bands (4 boiler activation and deactivation periods in heating mode even with different times from day to day) are
available for every day selected, as shown in the following table:
FACTORY SETTINGS
On 1 Of 1 On 2 Of 2 On 3 Of 3 On 4 Of 4
MONDY DAY 1 (monday)
06:00 08:00 11:00 13:00 17:00 23:00 24:00 24:00
TUEDY DAY 2 (tuesday)
WEDDY DAY 3 (wednesday)
THUDY DAY 4 (thursday)
FRIDY DAY 5 (friday)
SATDY D AY 6 (saturday)
SUNDY DAY 7 (sunday)
To set a single time band, proceed as follows:
• Press the IP button and then the button ;
• choose a day of the week (1…7) by repeatedly pressing the buttons +/- ;
• press the OK button;
• the display shows the message on 1 and the 4 digits of the time ashing, as shown in the
gure to side;
• use the buttons +/- to set the boiler lighting time;
• press the OK button;
• the display shows the message of 1 and the 4 digits of the time ashing;
• use the buttons +/- to set the boiler switching off time;
• press the OK button;
• repeat the same operations from point 4 to set the remaining three time bands;
• press the IP button to exit the function.
1Programming in HEATING MODE
2PROGRAMMED TIME BAND
09:00 - 12:00
3Day of the week: Monday
By setting the lighting time "on…" equal to the
switching off time "of…", the time band is cancelled and
the program goes to the next time slot. (ex. on1=09:00
– of1=09:00 he programme “skips” time band 1 and continues
with on2…).
1.6.2 Groups of days
This function enables the programming of 4 common boiler activation and deactivation time slots for several days or the entire
week (see the summary table below).
To set a single time band, proceed as follows:
• Press the IP button and then the button ;
• Select a GROUP of days by repeatedly pressing the buttons +/- ;
• press the OK button;
• repeat the operations described in points 4-10 of paragraph "Single days".
Summary table of available groups of days FACTORY SETTINGS
Group “MO-FR” DAY 12345 from Monday to Friday As per table in paragraph “Single
days”.
Group “SA-SU” DAY 6 7 Saturday and Sunday 07:00 – 23:00
Group “MO-SA” DAY 123456 from Monday to Saturday As per table in paragraph “Single
days”.
Group “MO-SU” DAY 1234567every day of the week As per table in paragraph “Single
days”.
3
2
1

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USER Section (en)
7689490.01 (1-09/17)
1.7 PROGRAMMING DHW MODE OPERATION TIMES
(only for boilers connected to an external heater)
This function enables the programming of four boiler DHW mode operation time slots in the
span of a week (the programmed time slots are the same for every day of the week).
To set the programming of DHW mode operation times, proceed as follows:
• Press the IP button and then the button to enter the programming (heating and
DHW modes);
• Select the DHW programme “HW PR” by repeatedly pressing the buttons +/- ;
• Press the OK button;
• Set the time slots in which you can enable DHW mode operation by repeating the operations described in points 4-10 of
paragraph "Single days" (factory setting 06:00 - 23:00).
the installer has to set “HW PR” parameter = 2, as described in section "INFORMATION AND ADVANCED SETTING MODE".
1Programming in DHW MODE
2PROGRAMMED TIME BAND
09:00 - 12:00
3Days of the week
1.8 ECONOMY - COMFORT FUNCTION
This function enables the user to set two different room temperature setpoints:
Economy / Comfort.
For more simplicity it’s better to set the COMFORT value temperature higher than the ECONOMY value temperature.
To set the required room temperature, press the button:
• the "ECONM" iwriting shows the operating in reduced room temperature mode: display shows symbol;
• the "COMFR" writing shows the operating in nominal room temperature mode: display shows symbol;
To temporary change the setting room temperature value, press +/- buttons or see section "TEMPERATURE VALUES
MODIFICATION BY PRESSING THE BUTTON".
This function could operates in automatic or in manual mode:
AUTOMATIC OPERATION (displayed symbol )
The setting room temperature depends on the time slot (section "PROGRAMMING HEATING MODE OPERATION TIMES").
Inside the time slot the room temperature is the COMFORT value, outside the time slot the room temperature is the ECONM value.
To temporary change the room temperature value (from COMFORT to ECONOMY or vice versa) press the button. This
changes has effect until the next time change over.
MANUAL OPERATION (displayed symbol )
Press button to set the gas boiler in manual operation mode.
To temporary change the room temperature value (from COMFORT to ECONOMY or vice versa) press the button. This
change has effect until the next button pressure.
1.9 SHOWER FUNCTION
The shower function ensures better hot water comfort, e.g. during a shower.
This function enables domestic hot water to be drawn at a lower temperature than the nominal temperature value.
To set or modify the max. shower function temperature value, refer to section "TEMPERATURE VALUES MODIFICATION BY
PRESSING THE BUTTON".
This function can be manually activated in the following way:
• Press one of the two buttons +/- ( ) and then the button to activate the function (the message SHOWR briey appears on
the display, followed by the message HW SS);
• press the OK button while the ow temperature and the symbol ash on the display;
• the duration of the function is 60 minutes (during this time the symbol ashes). At the end of this time the domestic hot
water temperature returns to the value of the previously set operating mode (the symbol is no longer intermittent on the
display).
Note: To disable the function before the end of the 60 minutes, proceed as follows:
• press one of the two buttons +/- ( ) and then the button ;
• press the OK button, the display shows the message "HW S^".
3
2
1
1234567
DAY
1234567
DAY

7689490.01 (1-09/17) 10
USER Section (en)
1.10 TEMPERATURE VALUES MODIFICATION BY PRESSING THE BUTTON
To modify the room temperature values, proceed as follows:
• press the IP button to enable the PROGR function;
• press the button to select the required function as described in the following table:
Function Display Description of function
COMFR The set temperature value ashes
(factory setting = 20°C) Boiler operation in heating mode at nominal temperature.
ECONM The set temperature value ashes
(factory setting = 18°C) Boiler operation in heating mode at reduced temperature.
NOFRS The set temperature value ashes
(factory setting = 5 °C)
Boiler operation in heating mode at room frost protection
temperature.
SHOWR The set temperature value ashes
(factory setting = 40°C) Boiler operation in DHW mode at DHW temperature set.
• Press the +/- button to modify the value of the selected function;
• press the IP button to exit the function.
1.11 PROGRAMMABLE SWITCHING TIME FUNCTION (BUTTON )
1.11.1 HOLIDAY PROGRAM function
It is possible to temporary shut off the timing program (section "PROGRAMMING HEATING MODE OPERATION TIMES") for a
certain period of time. During this period of time a minimum room temperature value is guaranteed (default value 5°C). To modify
this temperature value see section "TEMPERATURE VALUES MODIFICATION BY PRESSING THE BUTTON" under the
entry “NOFRS”.
To enable the function proceed as follows:
• press the button to set the function to “AUTO” (symbol );
• press the button, the display shows the writing MM 60 and the symbols ashing.
In this example the function has a period of 60 minutes.
Press the +/- buttons to set the period of the timing program with 10 minutes step. The period of time is settable from a
minimum of 10 minutes to a maximum of 45 days.
By pressing the + button after 90 minutes, the display shows HH 02:
in this case the period of time is carries out in hours from a minimum of 2 hours to a maximum of 47 hours, with 1 hour step.
By pressing the + button after 47 hours, the display shows DD 02:
in this case the period of time is carried out in days from a minimum of 2 days to a maximum of 45 days, with 1 day step.
Do not press any button after having enabled this function. By pressing some of the remote control buttons, it is possible
that the manual function is enabled by mistake (in this case the display shows the and that causes the “Holiday Program”
function shut off . In this case it is necessary to repeat the instructions described at the beginning of this section to enable
again the function.
1.11.2 PARTY function
This function allows the user to set a temporary room temperature value. The operating mode returns to a previews setting at the
end of this period of time.
To enable the function, proceed as follows:
• press the button to set the function to "MANUAL" (symbol );
• press the button, the display shows the writing MM 60 and the ashing;
• to set the period of the timing program see the section "HOLIDAY PROGRAM function".
• to modify the room temperature value, press the OK button (the display shows "AMB") then press the +/- buttons.
2. PROLONGED SHUTDOWN. ANTI-FREEZE PROTECTION
Do not drain the whole system as lling up with water again could cause unnecessary and harmful scale to build up inside the
boiler and the heating elements. If the boiler is not used during winter and is therefore exposed to the danger of frost, add some
specic anti-freeze to the water in the system (e.g.: propylene glycol coupled with corrosion and scale inhibitors). The electronic
boiler management system includes a “frost protection” function for the heating system which, when delivery temperature falls
below 5°C, lights the burner until a delivery temperature of 30°C is reached.
The function is operative if: the boiler is electrically powered, there is gas, system pressure is normal and the boiler is not
blocked.

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USER Section (en)
7689490.01 (1-09/17)
3. GAS CONVERSION
The boilers can operate both on natural gas (G20) and LPG (G31). All gas conversions must be made by the AUTHORISED
TECHNICAL SERVICE CENTRE.
4. TROUBLESHOOTING
If a fault occurs, the display shows the symbols ashing together with the <ERROR> writing.
The fault is identied by an error code followed by E letter and is not resettable.
Call an authorized Service Centre.
Description of fault Action
09 Gas valve connection error Call the Authorised Service Centre.
10 External probe sensor faulty Call the Authorised Service Centre.
12 Hydraulic differential pressure switch switching failure Call the Authorised Service Centre.
13 Hydraulic differential pressure switch contacts stuck Call the Authorised Service Centre.
15 Gas valve control error Call the Authorised Service Centre.
18 Hydraulic circuit automatic lling in progress Wait for the end of the lling cycle
19 Fault in system lling phase Press and hold down for at least 2 seconds.
20 NTC ow sensor faulty Call the Authorised Service Centre.
28 NTC fumes sensor faulty Call the Authorised Service Centre.
40 NTC return sensor faulty Call the Authorised Service Centre.
50 NTC domestic hot water sensor faulty
(only for heating-only model with storage boiler) Call the Authorised Service Centre.
53 Fumes outlet obstructed
Disconnect the boiler from the mains power supply for a few
seconds. If the fault persists, call the authorised technical
service centre
55 Electronic board not calibrated Call the Authorised Service Centre.
83…87 Communication problem between boiler board and control
unit. Probable short circuit on wiring. Call the Authorised Service Centre.
92 Fumes fault during calibration (probable fumes
recirculation) Call the Authorised Service Centre.
109 Air in boiler circuit
(temporary fault) Call the Authorised Service Centre.
110 Safety thermostat tripped due to overtemperature (pump
probably blocked or air in heating circuit). Press and hold down for at least 2 seconds.
117 Pressure in hydraulic circuit too high (> 2,7 bar) Call the Authorised Service Centre.
118 Pressure in hydraulic circuit too low Check that the pressure in the system is correct; See the
FILLING THE SYSTEM section.
125 No circulation safety trip
(control performed via a temperature sensor) Press and hold down for at least 2 seconds.
128 No ame Press and hold down for at least 2 seconds.
129 Loss of ame at ignition Call the Authorised Service Centre.
130 Fumes NTC tripped due to overtemperature Press and hold down for at least 2 seconds.
133 Ignition failure (5 attempts) Press and hold down for at least 2 seconds.
134 Gas valve blocked Press and hold down for at least 2 seconds.
135 Internal board error Press and hold down for at least 2 seconds.
154 Delivery/return probe control test Call the Authorised Service Centre.
160 Fan fault Call the Authorised Service Centre.
178 Intervention of safety thermostat for excess temperature in
low temperature system Call the Authorised Service Centre.
270 Overheating exchanger Call the Authorised Service Centre.
317 162 Call the Authorised Service Centre. Call the Authorised Service Centre.
321 163 Call the Authorised Service Centre. Call the Authorised Service Centre.
384 164 Parasite ame (internal error) Press and hold down for at least 2 seconds.
385 165 Input voltage too low Automatic reset at voltages in excess of 175V. If this fault
persists, call the Authorised Service Centre.
431 Exchanger sensor faulty Call the Authorised Service Centre.

7689490.01 (1-09/17) 12
USER Section (en)
5 reset attempts can be performed after which the boiler shuts down. Wait 15 minutes before attempting to reset the boiler
again.
5. SWITCHING OFF THE BOILER
To turn off the boiler, disconnect the electric power supply using the two-pole switch. In the “Off” operating mode the boiler stays
off but the electrical circuits remain powered and the anti-freeze function remains active.
6. FILLING THE SYSTEM
The device has an automatic lling system. For further information, refer to the section FILLING THE SYSTEM in "INSTALLER
section".
If pressure drops occur frequently, have the boiler checked by the AUTHORISED TECHNICAL SERVICE CENTRE.
7. ROUTINE MAINTENANCE INSTRUCTIONS
To keep the boiler efcient and safe, have it checked by the Authorised Service Centre at the end of every operating period.
Careful servicing ensures economical operation of the system.

13
INSTALLER Section (en)
7689490.01 (1-09/17)
INSTRUCTIONS PRIOR TO INSTALLATION
The following notes and instructions are addressed to tters to allow them to carry out trouble-free installation. Instructions for
lighting and using the boiler are contained in the ‘Instructions for Users’ section. Installation, servicing and running of domestic
gas-red systems must be performed by qualied technicians, in compliance with current regulations.
Additionally, bear in mind the following:
• When installing the unit in environments with temperatures lower than 0°C, take the necessary precautions to avoid the
formation of ice in the siphon and in the condensation drain.
• This boiler can be connected to any type of double- or single-pipe convector plate, radiator or thermoconvector. Design the
system sections as usual, though, bearing in mind the available ow-head at the plate, as shown in section 16.
• Do not leave any packaging (plastic bags, polystyrene, etc.) within the reach of children as they are a potential source of
danger.
• Initial lighting of the boiler must be carried out by an authorised Service Engineer, as indicated on the attached sheet.
Failure to observe the above will render the guarantee null and void.
ADDITIONAL PUMP WARNING
If an additional pump is used on the heating system, position it on the boiler return circuit. This will allow the correct operation of
the water pressure switch.
SOLAR WARNING
If the instantaneous (mixed) boiler is connected to a system with solar panels, the maximum temperature of the domestic hot water
entering the boiler must not exceed 60°C.
Do not leave any packaging (plastic bags, polystyrene, etc.) within the reach of children as they are a potential source of danger.
8. INSTALLING THE BOILER
The boiler can be installed in the following ways:
1. Recessed installation outdoors.
2. Wall-mounted installation outdoors in partially sheltered areas.
3. Wall-mounted open air installation outdoors.
CONTENTS OF PACK
• Template (see gure in annex "SECTION" C at the end of this manual)
• Boiler supporting bar for installation in box
• Boiler supporting bar for wall-mounted installation
• 8 mm expansion plugs and pressure screws
Fit two G3/4 taps (ow and return) on the central heating circuit; these taps make it possible to carry out important operations on
the system without draining it completely. If you are either installing the boiler on an existing system or replacing one, as well as
the above, t a settling tank under the boiler on the system return line in order to collect any deposits and scale circulating in the
system after ushing.
Do not lift the boiler exerting pressure on the plastic parts like the siphon and the ue turret.
Tighten the boiler water connections with care (maximum tightening torque 30 Nm).
Before starting up the boiler, ll the water siphon to prevent the fumes from diffusing in the room.
DIMENSIONS OF THE BOILER AND BOX
The dimensions of the boiler and box and the relative installation positions of the water connections are shown in the annex
"SECTION" C at the end of the manual.
Condensate drain point GAS inlet (G3/4”)
Safety valve drain point Cold domestic water inlet / System lling tap (G1/2”)
Heating system ow (G3/4”) Heating system return (G3/4”)
DHW ow (G1/2”) models 24 and 28 / storage boiler
(G3/4”) models 1.12 and 1.24

7689490.01 (1-09/17) 14
INSTALLER Section (en)
8.1 RECESSED INSTALLATION OUTDOORS
The appliance must be installed inside the template box which is supplied as an accessory in a separate package. The template
box must be tted into the wall in a niche created for the purpose and blocked with special rag bolts at the sides.
The useful internal depth of the template box must be a uniform 240 mm to ensure proper installation of the boiler. If it is not,
use the spacing frame kit available as an accessory.
Connect the system to the gas and water inlets on the lower bar of the template box.
After completing all masonry work, mount the boiler supporting bar on the ttings in the template box. Insert the 6 self-tapping
screws supplied with the boiler in the holes of the bar to x the latter in place. Mount the boiler on the bar at the point of the upper
holes (detail A in the gure) and make the hydraulic connections with the hoses (available as an accessory).
b
A
The safety valve MUST be connected to a drain trap at the point of the hole " " at the base of the template box to prevent this
valve from leaking.
Connect the condensate drain trap to a sump at the point of the hole " " at the bottom of the template box making sure that it
is on a continuous slope.
Avoid horizontal stretches.
After xing the boiler, connect the ue and air ducts, supplied as accessories, as described in the following sections.
8.2 WALL-MOUNTED INSTALLATION OUTDOORS IN PARTIALLY SHELTERED
AREAS
This boiler may be installed outdoor in a partially protected location. A partially protected location is a location where the boiler is
not directly exposed to weather conditions (rain, snow, hailstorm, etc.).
After deciding the exact location of the boiler, x the template to the wall. Connect the system to the gas and water inlets present
on the lower bar of the template. Make sure the rear part of the boiler (back) is as parallel as possible to the wall (otherwise, shim
the lower part). After xing the boiler to the template, connect the ue and air ducts, supplied as accessories, as described in the
following sections. Connect the siphon to a drain trap, making sure the slope is continuous. Avoid horizontal stretches.

15
INSTALLER Section (en)
7689490.01 (1-09/17)
8.3 WALL-MOUNTED OPEN AIR INSTALLATION OUTDOORS
This boiler can be installed in the open air outdoors with the shelter kit supplied as an accessory.
After deciding the exact location of the boiler, x the template to the wall. Connect the system to the gas and water inlets present
on the lower bar of the template. Make sure the rear part of the boiler (back) is as parallel as possible to the wall (otherwise, shim
the lower part).
After mounting the boiler on the wall, install the shelter kit following the procedure in the gure. Connect the ue and air ducts,
supplied as accessories, as described in the following sections.
12
3
766012101
5O
5O
9. FILLING THE SYSTEM
The initial lling procedure and resetting the pressure of the system depend on the model of the boiler:
24 -28 MODELS
INITIAL FILLING PHASE
For initial lling of the system, proceed as follows:
• remove the front panel of the boiler;
• check that the automatic air vent valve in the body of the valve of the pump is
open;
• ll the system at the tap in the hydraulic unit (detail "A" in the gure to the side);
• vent all the heating elements concerned;
• check that the pressure displayed on the pressure gauge (detail "B" in the gure
to the side) is 0.8 - 1.5 bar, with the system cold. In case of overpressure, open
the boiler drain valve;
• Close the system lling tap.
SYSTEM PRESSURE RESETTING PHASE
The pressure of the system is automatically reset whenever it drops below ~ 0.8 bar.
The pressure switch requires the lling of water. The text Err 18 is shown on the display of the Room Unit during the lling phase.
The cycle runs for a maximum of ~ 6 minutes. The text Err 19 is shown on the display of the Room Unit if the pressure is not reset
at the end of the lling cycle. The boiler begins a new lling cycle when the fault is reset.
If the fault is caused by blocking of the lling electrovalve, it is possible to proceed manually with the system lling tap.
1.12 -1.24 MODELS
INITIAL FILLING PHASE
For initial lling of the system, proceed as follows:
• remove the front panel of the boiler;
• check that the automatic air vent valve in the body of the valve of the pump is open;
• check that the lling tap in the boiler is always open. Fill the system by turning the screw on the body of the electrovalve
(turn to position "A");
• vent all the heating elements concerned;
• Check that the pressure displayed on the pressure gauge is 0.8 -1.5 bar, with the boiler cold. In case of overpressure, open
the boiler drain valve;
bis

7689490.01 (1-09/17) 16
INSTALLER Section (en)
• after lling, turn the screw back to position "C".
SYSTEM PRESSURE RESETTING PHASE
The pressure of the system is automatically reset whenever it drops below ~ 0.8 bar.
The pressure switch requires the lling of water. The text Err 18 is shown on the display of the Room Unit during the lling phase.
The cycle runs for a maximum of ~ 6 minutes. The text Err 19 is shown on the display of the Room Unit if the pressure is not reset
at the end of the lling cycle. The boiler begins a new lling cycle when the fault is reset.
If the fault is caused by blocking of the lling electrovalve, it is possible to proceed manually with the system lling tap.
For the models 24 - 28, the lling tap in the boiler (see SECTION G) must always remain closed.
For models 1.12 - 1.24, the automatic lling electrovalve is located under the circulator. Make sure to protect the electrovalve
against contact with water when opening the central screw of the circulator to release it or to check circulation.
The boiler is tted with a hydraulic pressure gauge which prevents the boiler from working if there is no water.
The internal function of the electronic board of the appliance (see the section SYSTEM GAS EXTRACTION FUNCTION) is
used to facilitate the elimination of the air inside the heating circuit when the boiler is rst installed or after maintenance
when the water is drained from the primary circuit.
Take special care when lling the heating system. In particular, open any thermostat valves in the system, ensure the water
enters slowly in order to prevent the formation of air inside the primary circuit until operating pressure is reached. Lastly,
vent any radiators in the system. BAXI declines all liability for damage deriving from the presence of air bubbles in the
primary exchanger due to the incorrect or imprecise observance of the above.
10. INSTALLING THE DUCTS
The boiler is easy and exible to install thanks to the extensive range of available accessories, as described below. The boiler
has been designed for connection to a vertical or horizontal coaxial ue-air duct. The boiler can also be used with separate ducts
using the accessory splitting kit.
WARNINGS
C13, C33 The terminals for separate ues must be tted inside a 50 cm square. Detailed
instructions are provided with the individual accessories.
C53 Do not t the ue and air duct terminals on opposite walls of the building.
C63 The pressure drop of the ducts must not exceed 100 Pa. The ducts must be certied for
this specic use and for a temperature in excess of 100°C. The ue terminal must be certied
to EN 1856-1.
C43, C83 The ue terminal or ue duct must be suitable for the purpose.
For optimal installation, the accessories supplied by the manufacturer should be used.
To optimise operating safety, make sure the ue ducts are rmly xed to the wall with
suitable brackets. The brackets must be positioned over the joints at a distance of
approximately 1 metre from one another.
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17
INSTALLER Section (en)
7689490.01 (1-09/17)
10.1 CONCENTRIC DUCTS
This type of duct is used to discharge exhaust fumes and draw combustion
air both outside the building and if a LAS ue is tted. The 90° coaxial bend
allows the boiler to be connected to a ue-air duct in any direction as it can
be rotated by 360° It can also be used as a supplementary curve combined
with a coaxial duct or a 45° curve.
If fumes are discharged outside the building, the ue-air duct must protrude
at least 18 mm from the wall to allow an aluminium weathering surround to
be tted and sealed to avoid water inltrations.
• A 90° bend reduces the total duct length by 1 metre.
• A 45° bend reduces the total duct length by 0.5 metres.
• The rst 90° bend is not included when calculating the maximum available length.
Fasten the suction pipes using two galvanised Ø 4,2 mm self tapping screws with minimum length 19 mm. If not
included with the supply, screws with the same characteristics must be sourced on the market separately.
Before securing the screws, make sure that at least 45 mm of the pipe is inserted into the gasket (see the gures in annex
"SECTION" D at the end of this manual).
Make sure there is a minimum downward slope of 5 cm per metre of duct towards the boiler.
SOME OUTLET DUCT INSTALLATION EXAMPLES AND THEIR RELATIVE MAXIMUM LENGTHS ARE SHOWN IN ANNEX
"SECTION" D AT THE END OF THIS MANUAL.
10.2 SEPARATE DUCTS
This type of installation makes it possible to discharge exhaust fumes both
outside the building and into single ue ducts. Comburent air can be drawn
in at a different location from that of the ue terminal. The accessory splitting
kit comprises a ue duct adaptor (80) (B) and an air duct adaptor (A). For the
air duct adaptor, t the screws and seals previously removed from the cap.
The 90° bend is used to connect the boiler to the inlet and outlet ducts, adapting
them to various requirements. It can also be used as a supplementary curve
combined with a duct or a 45° bend.
• A 90° bend reduces the total duct length by 0.5 metres.
• A 45° bend reduces the total duct length by 0.25 metres.
• The rst 90° bend is not included when calculating the maximum available length.
Make sure there is a minimum downward slope of 5 cm per metre of duct towards the boiler.
SOME OUTLET DUCT INSTALLATION EXAMPLES AND THEIR RELATIVE MAXIMUM LENGTHS ARE SHOWN IN ANNEX
"SECTION" D AT THE END OF THIS MANUAL.
SEPARATE DUCTS (TYPE B23)
For B23 type discharge, the comburent air is drawn out of the room where
the boiler is installed. The accessories for separate 80 mm ducts are required
for the discharge of fumes. This type of installation makes it possible to
discharge exhaust fumes both outside the building and into single ue ducts.
The accessory splitting kit comprises an 80 mm ue duct adaptor (B) and
an air duct adaptor (A). For the air duct adaptor, t the screws and seals
previously removed from the cap.
THE MAXIMUM LENGTH OF THE FLUE DUCT IS 25 m.
SEPARATE DUCTS WITH SHELTER KIT (TYPE B23)
For B23 type discharge, the comburent air is drawn out of the
room where the boiler is installed. The 60/80 mm ue duct
adaptor and the 80 mm ue ducts supplied as accessories
are required for the discharge of fumes.
THE MAXIMUM LENGTH OF THE FLUE DUCT IS 25 m.
CG_2549
AB
CG_2549
AB
CG_2549
7660859

7689490.01 (1-09/17) 18
INSTALLER Section (en)
11. ELECTRICAL CONNECTIONS
This machine is only electrically safe if it is correctly connected to an efcient earth system in compliance with current safety
regulations. Connect the boiler to a 230V single-phase earthed power supply using the supplied three-pin cable, observing correct
Live-Neutral polarity.
Use a double-pole switch with a contact separation of at least 3 mm.
When replacing the power supply cable, t a harmonised “HAR H05 VV-F” 3x0,75 mm2 cable with a maximum diameter of 8 mm.
To access the terminal block, remove the front boiler panel (xed with two screws at the bottom), turn the control box downwards
and access terminal blocks, used for the electrical connections, after removing the protective cover. The 2 A fast-blowing fuses are
incorporated in the power supply terminal block (to check and/or replace the fuse, pull out the black fuse carrier).
SEE WIRING DIAGRAM IN ANNEX "SECTION" B AT THE END OF THIS MANUAL.
Make sure that the overall rated power input of the accessories connected to the appliance is less than 2A. If it is higher, install
a relay between the accessories and the electronic board.
The connections in terminal block M1 are high voltage (230 V). Before making connections, make sure the appliance is
disconnected from the power supply. Respect the input polarity on terminal block M1: L (LINE) - N (NEUTRAL).
ACCESS TO THE BOILER CONTROL BOX
Access the boiler control box following this procedure (see gure below):
• power off the boiler;
• remove the front panel of the template box, when applicable, and of the boiler (secured with 2 screws);
• slide the control box carefully away from the side of the boiler;
• put the control box in place;
• when done, put the control box back in its original place.
CG_2484
TERMINAL BLOCK M1
(L) = Live (brown)
(N) = Neutral (light blue).
= Earth (yellow-green).
(1) (2) = contact for Room Thermostat.
Put back the jumper on terminals 1-2 of boiler terminal
block M1 if the room thermostat is not used or if the
modulating Room Unit supplied with the boiler is not
connected.
TERMINAL BLOCK M2
Terminals 1 - 2: Room Unit connection (low voltage).
Terminals 4 - 5: External Sensor connection (supplied as an
accessory).
Terminals 6 - 8: not used.
Terminal 7: ----.
Terminals 9 - 10: DHW storage boiler sensor connection (only
for mono-thermal boilers 1.12-1.24).
RELAY INTERFACE TERMINAL BLOCK (S.R.)
Terminals 1 (common) - 2 (closed) - 3 (open): potential-free contacts, and for conguration of these see parameter P04
described in the section "SETTING PARAMETERS".
Terminals 5 (common) - 6 (closed) - 7 (open): contacts 5 and 7 used to control the automatic system lling valve.
If the appliance is connected to an underoor system, install a limit thermostat to prevent the latter from overheating.
Use the relative cable grommets at the bottom of the boiler to thread the cables through to the terminal blocks.
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19
INSTALLER Section (en)
7689490.01 (1-09/17)
11.1 INSTALLING THE REMOTE CONTROL ON THE WALL
Before mounting the accessory, consult the Room Unit manual.
Proceed as follows:
• Disconnect the boiler from the mains power supply.
• Remove the jumper from the ends of the contacts 1-2 of the
terminal block M1.
• Open the Remote Control, separating the base B from the front
panel A.
• Pass the two wires from the boiler terminal block M2 through the
hole in the base B to apply to the wall.
• Connect wires 1-2 (non-polarised) of the boiler terminal block M2
to the ends of the terminal of the base B.
• Fix the base Bto the wall using the expansion plugs and screws
supplied with the accessory.
• Apply the front panel Ato the base xed to the wall, taking care
not to apply excessive force.
• Power the boiler making sure that the Remote Control lights
up.
The Room Unit controls the boiler with the exception of the Flue Cleaner Function, the Initial Start-up Function and the
Combustion Adjustment Function. The Boiler Information menu is not available on the Room Unit.
If the error code "E83" is displayed there is a communication fault between the main board and the Control Unit. Probable
short circuit on wiring. Avoid placing cables near sources of heat, high voltage and magnetic elds.
11.1.1 INSTALLER FUNCTIONS
To access the Information and Advanced Setting mode, it is necessary to press, for at least 3 seconds, the IP button;
in INFO mode the display shows "INFO".
To escape the INFO mode briey press the IP button.
In this mode press the OK button to scroll the windows; to set parameters press the +/- button.
Communications between the main board and the remote control is not immediately. In some case it may happen that the
command given through the remote control takes some time depending on the type of the transferred information.
CENTRAL HEATING (CH)
• "CH SL" Max. heating circuit setpoint, value settable with the buttons +/- . WARNING: to change the unit of measure from
°C to °F and vice versa, press the button.
• "EXT°c" Outside temperature (with external sensor connected).
• "CH O>" Maximum Heating ow temperature.
• "CH R<" Return heating temperature (unplanned).
• "CH S^" CH temperature setpoint.
• "CH MX" Maximum CH temperature setpoint.
• "CH MN" Minimum CH temperature setpoint.
DOMESTIC HOT WATER (DHW)
• "HW O>" D.H.W. ow temperature.
• "HW S^" Maximum setpoint temperature value setting. Press the +/- buttons to set the value.
• "HW MX" Maximum D.H.W. temperature setpoint.
• "HW MN" Minimum D.H.W. temperature setpoint.
ADVANCED INFORMATION
• "PWR %" Power level/modulating ame (%).
• "P BAR" Water pressure heating circuit (bar).
• "F L/M" Water ow rate (l/min).
1
9
8
7
6
5
4
3
2
10
A
B
M2
C
CG_2586

7689490.01 (1-09/17) 20
INSTALLER Section (en)
PARAMETERS SETTING
• "K REG" Central Heating setting constant (0,5...9,0 - factory setting = 3 - Refer to annex SECTION E). Press +/- . buttons
to set the value. An high value setting involves a high ow temperature. To set a correct value of the Central Heating constant
"K REG", involves the room temperature to match the CH setpoint with external temperature changes over.
• "BUILD" A parameter that takes into account the degree of building insulation (1..10 - factory setting = 5). When the outside
temperature varies, the room temperature changes at different rates, depending on the building thermal storage capacity.
An high value setting involves a heavy building structures (the room temperature will respond slower to outside temperature
variations; buildings with thick walls or with external insulation). A low value setting involves a light building structures (the room
temperature will respond quicker to outside temperature variations; buildings with a light envelope). Press +/- . buttons to
set the value.
• "YSELF" CH ow temperature auto setting function Enabled=1/Disabled=0 (factory setting = 1). With function enable, the
constant "K REG" is modied to match the room temperature comfort. This function operates with the external sensor
connected. Press +/- buttons to set the value.
• "AMBON" Room temperature inuence Enabled/Disabled (1/0). Factory setting 1. In this case, the rooms temperature
regulation it depends on the ow temperature set ("CH SL"). Press +/- buttons to set the value. Note: Refer to the
summary table of possible AMBON and MODUL combinations.
• "T ADJ" Reading correction of the remote control Room Sensor (factory setting 0.0°C). It allows correction of the Room Sensor
reading by a value ranging from -3.0°C to 3.0°C, with a resolution of 0.1°C. The value may be set using the buttons +/- . The
function is enabled only if the unit of measurement is °C.
• "MODUL" Enable/disable Modulation of ow temperature depending on the room temperature and external temperature value
(with external sensor connected). (with Room Sensor enabled). A value equal to 1 indicates enabling of delivery setpoint
modulation; a value equal to 0 indicates disabling. The above value can be modied with the buttons +/- . Note: Refer to
the summary table of possible AMBON and MODUL combinations.
Combination table between AMBON and MODUL functions.
AMBON MODUL BUTTONS FUNCTION +/-
1 1 Room temperature adjustment (modulating ow temperature)
01
With external sensor : KREG curve adjustment
Without external sensor : Calculated ow temperature adjustment
(It is advisable to set MODUL = 0)
0 0 Flow temperature adjustment
10 Room temperature adjustment (xed ow temperature)
• "HW PR": Enabling the DHW programmer (only for boilers connected to an external hot water tank). Factory setting 1.
0: Disabled.
1: Always enabled.
2: Enabled with DHW weekly program ("HW PR" refer to section "PROGRAMMING DHW MODE OPERATION TIMES").
• "NOFR": Frost protection Enabled/Disabled (1/0). Factory setting 1.
This value must be always enable (1).
• "COOL": Summer temperature control Enable/Disable (factory set = 0). By setting this parameter = 1 the function is enabled
and a new boiler operation mode “SUMMER+COOL” is available. This function is added to the ones described on section
"DESCRIPTION OF BUTTON (Summer - Winter - Heating only - Off)": SUMMER - WINTER - SUMMER+COOL - HEATING
ONLY - OFF. To enable the function, presss the button until the display shows the symbol on the right side of the hour.
The aim of this function is to enable the remote control to adjust the room temperature in summertime by controlling one or
more external cooling devices such as a condition machine. In this way, the boiler relay card enables the external condition
system when the room temperature is higher than the remote control temperature set value. When the function operates, the
display shows the symbol ashing. See the following gure and refers to the SERVICE instruction manual.
11.2 CONNECTING TO A ZONE SYSTEM
KEY TO ELECTRICAL CONNECTIONS (see diagram A in annex "SECTION" F at the end of this manual).
ZZone (1..n) EV Zone electrovalve
RRelay RT Room thermostat
The boiler can manage a zone heating system. The Room Unit (wall-mounted) can be used to control one zone while normal
ambient thermostats can be used to control the other zones.
SYSTEM CONNECTIONS
• Connect the zone 1 valve/pump to terminals 1 - 3 of the relay board terminal block inside the boiler control box.
• Connect the Ambient Thermostat contact of the other zones to terminals 1-2 of terminal block M1 (CONNECTING THE
AMBIENT THERMOSTAT section).
Check that parameter P04=02. Set parameter P10 (SETTING PARAMETERS section).