Lamborghini Caloreclima ALMA 24 MBS W TOP Product manual

24 MBS W TOP
28 MBS W TOP
32 MBS W TOP
LIBRETTO DI INSTALLAZIONE E MANUTENZIONE
INSTALLATION AND MAINTENANCE MANUAL
MANUAL DE INSTALACIÓN Y MANTENIMIENTO
CALDAIA MURALE A GAS CON BOLLITORE AD ACCUMULO - ALTO RENDIMENTO - MODULANTE
WALL-MOUNTED GAS BOILER WITH STORAGE WATER HEATER - HIGH EFFICIENCY - MODULATING
CALDERA MURAL DE GAS CON INTERCAMBIADOR DE ACUMULACIÓN - ALTO RENDIMIENTO - MODULANTE
PREGASI CONSEGNARE
L’INSERTO”LIBRETTO D’USO”
AL SIG. UTENTE
PLEASE MAKE SURE THAT THE
“USE MANUAL” IS HANDED
OVER THE USER
LOS ROGAMOS QUE
ENTREGUEN EL “MANUAL DE
USO” AL SR. USUARIO

- 44 -
LAMBORGHINI CALOR S.p.A.
Dott. Felice Bo’
(General Manager)
________________________________
CONFORMITY
The ALMA MBS W TOP boilers are in conformity with:
• Gas Directive 90/396/EEC
• Efficiency Directive 92/42/EEC (✫✫✫)
• Electromagnetic Compatibility Directive 89/336/EEC
• Low Voltage Directive 73/23/EEC.
For the production serial number, refer to the technical data plate of the boiler.
0694
Congratulations...
... on your excellent choice.
Thank you for choosing our products.
LAMBORGHINI CALORECLIMA is daily committed to seeking innovative technical solutions to satisfy every need.
Constant presence of our products on the Italian and international markets is assured by a widespread network
of Agents and Dealers assisted by “LAMBORGHINI SERVICE” (Technical Service) who assures qualified service
and maintenance of the boiler.
WARRANTY
The ALMA MBS W TOP boilers enjoy a SPECIFIC WARRANTY as of the date of validation by your local Technical
Service.
We therefore invite you to timely contact the above mentioned Technical Service, who will set up the boiler FREE OF
CHARGE on the conditions specified in the WARRANTY CERTIFICATE provided with the boiler, which we suggest you
read carefully.

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ENGLISH
CONTENTS
GENERAL
SAFETY WARNINGS AND RULES Page 46
DESCRIPTION “ 47
OPTIONAL ACCESSORIES “ 47
MAIN COMPONENT STRUCTURE “ 48
DIMENSIONS “ 49
CIRCULATOR “ 49
TEChNICAL DATA “ 50
SANITARY hOT WATER PERFORMANCE “ 50
IDENTIFICATION “ 53
hYDRAULIC CIRCUIT “ 54
CONTROL PANEL “ 55
DISPLAY “ 56
PARAMETER PROGRAMMING “ 57
DESCRIPTION OF OPERATION AND FUNCTIONS “ 58
WIRING DIAGRAMS “ 63
INSTALLATION
PRODUCT RECEIPT Page 65
hANDLING “ 65
hYDRAULIC CONNECTION “ 66
INSTALLATION “ 67
TURNING ON “ 68
FLUE GAS EXhAUST CONNECTION “ 69
ELECTRICAL CONNECTIONS “ 73
TURNING OFF “ 75
ChECKS AND ADJUSTMENTS “ 76
OPERATION WITh DIFFERENT TYPES OF GAS “ 80
MAINTENANCE
MAINTENANCE “ 82
CONTENTS

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GENERAL
SAFETY WARNINGS AND RULES
•The instruction manuals provided form an integral part of the boiler and consequently must be carefully kept and must
ALWAYS accompany the boiler, even in the case of transfer to another owner or user or transfer to another system. In
the event of damage or loss, request another copy from your local Technical Service.
•After unpacking, check the integrity and completeness of the supply, and if anything does not correspond, contact the
Agency which sold you the boiler.
•The boiler must be installed by a qualified company in accordance with Law 46 of 5 March 1990. After installation this
company issues a declaration of conformity as proof of workmanlike installation, i.e. in compliance with the current
regulations and instructions provided by the manufacturer in the instruction manual that accompanies the boiler.
•The boiler may only be used for the purpose for which it was designed as specified by the manufacturer. The manu-
facturer cannot be contractually or extra-contractually be held responsible for damage caused by persons, animals or
things, or installation, adjustment and maintenance errors, or improper use.
•In the event of water leaks, disconnect the boiler from the electrical power supply, cut off the water supply and promptly
notify Technical Service or professionally qualified personnel.
•Periodically check that the operating pressure of the hydraulic system is between 1 and 1.5 bar. If otherwise, contact
Technical Service or professionally qualified personnel.
•It is recommended to service and clean the boiler at least once a year. These operations must be carried out
exclusively by professionally qualified and authorised personnel.
PROHIBITIONS
•DO NOT allow children or incapable and unassisted persons to make adjustments.
•DO NOT activate electrical devices or equipment such as switches, electrical appliances, etc. if you can smell fuel or
unburnt fuels. In this case:
- air the room by opening the doors and windows
- close the fuel cut-off device
- promptly have Technical Service or professionally qualified personnel intervene.
•DO NOT touch the boiler if you are barefoot and parts of your body are wet.
•DO NOT carry out any technical or cleaning operation before having disconnected the boiler from the electrical power
supply by positioning the main switch on OFF.
•DO NOT modify the safety or adjustment devices without the authorisation and instructions from the boiler manufacturer.
•DO NOT pull, detach or twist electrical cables leading from the boiler, even if they are disconnected from the electrical
power supply.
•DO NOT tap or reduce the size of the vents of the room where the boiler is installed. The vents are essential for proper
combustion.
•DO NOT leave flammable containers and substances in the room where the boiler is installed.
•DO NOT litter the packaging material and keep it away from children as it is a potential hazard. It must be disposed of
in accordance with current legislation.

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GENERAL
ENGLISH
DESCRIPTION
The boilers operate fully automatically and the gas flow is controlled by an electronic control unit with the following cha-
racteristics:
- continuous modulation on both circuits
- possibility of adjusting the heat output
- possibility of adjusting slow ignition.
The models are equipped with:
- no-water pressure switch
- full safety thermostat
- high-efficiency flue gas exchanger.
ALMA 24-28-32 MBS W TOP
Sealed chamber boiler suitable for heating and production of sanitary hot water.
It is equipped with an electronic control unit for automatic ignition and ionising electrode flame control. For reasons of safety,
the efficiency of the electric fan is controlled by a pressure switch. The flue gas exhaust may essentially be made up of:
- A pipe concentric to the air intake pipe
- A split pipe for flue gas exhaust and combustion air intake.
WARNINGS
•Intervention of the safety devices indicates a potentially hazardous malfunction, therefore, immediately contact Technical
Service.
•Only Technical Service may replace the safety devices, exclusively using original components of the manufacturer.
Refer to the spare parts catalogue provided with the boiler. After any repair, check proper functioning of the boiler.
•THE BOILER MAY NOT, EVEN TEMPORARILY, BE STARTED IF THE SAFETY DEVICES ARE NOT FUNCTIONING
OR HAVE BEEN TAMPERED WITH.
OPTIONAL ACCESSORIES
The ALMA MBS W TOP boilers may be equipped with the following accessories to be ordered separately (see price list):
•Flue gas exhaust accessories
•Hydraulic connection kit
•Natural gas to LPG conversion kit
•LPG to natural gas conversion kit
•Fitting template kit
•Remote control kit
•External sensor kit

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GENERAL
MAIN COMPONENT STRUCTURE
1Sanitary water expansion tank
2Water heater sensor
3Heating expansion tank.
4Delivery sensor
5Circulator
63-way electric valve
7Safety flow switch
8Modulating coil
9Gas valve
10 Sanitary water unit
- 8 bar safety valve
- Flow regulator
- Check valve
- Inspection filter
11 Stainless steel water heater
12 Flue gas pressure switch
13 Flue gas fan
14 Flue gas exchanger
15 Full safety thermostat
16 Ignition electrode
17 Control electrodes
18 Burner
19 Automatic bypass
20 Combustion test ports
ALMA MBS W TOP

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GENERAL
ENGLISH
DIMENSIONS mm
Ø 80 split
Ø 80 intake
Ø 100 concentric
Flow rate (l/h)
Output (mbar)
CIRCULATOR
Output/head available to the system
Minimum safety flow switch activation ∆P 1,2 m.

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GENERAL
TECHNICAL DATA
SANITARY HOT WATER PERFORMANCE
Continuous delivery without flow limiter ∆T=30°C 11,4 l/min
Continuous delivery with flow limiter 12 l/min
Peak draw in the first 10 min. 157
Sanitary water pressure 8 bar
DESCRIPTION ALMA 24 MBS W TOP
Fuel G20 G30 G31
Gas supply pressure (nominal) 20 28-30 37 mbar
Boiler category II2H3+
Type of boiler B22 - C12 - C32 - C42 - C52 - C62 - C82
Nominal heating power (Qn) maximum 26 kW
minimum 12,1 kW
Useful nominal output (Pn) maximum 24,36 kW
minimum 10,68 kW
Max/min useful efficiency at Pn 93,7/88,3 %
Useful efficiency at 30% of Pn 90,7 %
Flue gas temperature (∆T) at Pn max 105 107 106 °C
Flue gas temperature (∆T) at Pn min 87 78 92 °C
Flue gas mass flow rate at Pn max 0,009 0,009 0,010 kg/s
Flue gas mass flow rate at Pn min 0,004 0,004 0,004 kg/s
CO2at Pn max 7,6 9 8,8 %
CO2at Pn min 3,5 3,46 3,45 %
CO at Pn max (0% of O2) 46,5 134 116 mg/kWh
CO at Pn min (0% of O2) 50,5 116 113 mg/kWh
NOx at Pn max (0% of O2) 268 379 374 mg/kWh
NOx at Pn min (0% of O2) 210 232 233 mg/kWh
Class NOx 2
Maximum permitted temperature 90 °C
Maximum permitted pressure for heating circuit 3 bar
Boiler water content 2 l
Water heater water content 50 l
Electrical power supply 230~50 V~Hz
Electrical power absorbed 140 W
Degree of electrical protection X4D IP
Heating expansion tank volume 8 l
Heating expansion tank preload 1 bar
Stack loss with burner on at Pn max 5,45 %
Stack loss with burner off 0,1 %
Mantle loss at Pn max 0,85 %
∆p minimum at air pressure switch 0,9 mbar
Noise 46 dB
Energy efficiency marking (EEC 92/42) ★ ★ ★
DESCRIPTION ALMA 24 MBS W TOP

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GENERAL
ENGLISH
SANITARY HOT WATER PERFORMANCE
Continuous delivery without flow limiter ∆T=30°C 13,3 l/min
Continuous delivery with flow limiter - l/min
Peak draw in the first 10 min. 172
Sanitary water pressure 8 bar
DESCRIPTION ALMA 28 MBS W TOP
Fuel G20 G30 G31
Gas supply pressure (nominal) 20 28-30 37 mbar
Boiler category II2H3+
Type of boiler B22 - C12 - C32 - C42 - C52 - C62 - C82
Nominal heating power (Qn) maximum 30.4 kW
minimum 14.2 kW
Useful nominal output (Pn) maximum 28.45 kW
minimum 12.6 kW
Max/min useful efficiency at Pn 93.6/88.7 %
Useful efficiency at 30% of Pn 90.9 %
Flue gas temperature (∆T) at Pn max 107.5 110 107 °C
Flue gas temperature (∆T) at Pn min 89.5 92 91 °C
Flue gas mass flow rate at Pn max 0.011 0.011 0.011 kg/s
Flue gas mass flow rate at Pn min 0.004 0.004 0.004 kg/s
CO2 at Pn max 7.8 9.24 8.75 %
CO2 at Pn min 3.36 4 3.9 %
CO at Pn max (0% of O2) 69 139 86 mg/kWh
CO at Pn min (0% of O2) 61 100 100 mg/kWh
NOx at Pn max (0% of O2) 338 412 404 mg/kWh
NOx at Pn min (0% of O2) 173 219 219 mg/kWh
Class NOx 2
Maximum permitted temperature 90 °C
Maximum permitted pressure for heating circuit 3 bar
Boiler water content 2 l
Water heater water content 50 l
Electrical power supply 230~50 V~Hz
Electrical power absorbed 153 W
Degree of electrical protection X4D IP
Heating expansion tank volume 8 l
Heating expansion tank preload 1 bar
Stack loss with burner on at Pn max 5.6 %
Stack loss with burner off 0.1 %
Mantle loss at Pn max 0.8 %
∆p minimum at air pressure switch 1.8 mbar
Noise 47 dB
Energy efficiency marking (EEC 92/42) ★ ★ ★
DESCRIPTION ALMA 28 MBS W TOP

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GENERAL
SANITARY HOT WATER PERFORMANCE
Continuous delivery without flow limiter ∆T=30°C 15,2 l/min
Continuous delivery with flow limiter - l/min
Peak draw in the first 10 min. 192
Sanitary water pressure 8 bar
DESCRIPTION ALMA 32 MBS W TOP
Fuel G20 G30 G31
Gas supply pressure (nominal) 20 28-30 37 mbar
Boiler category II2H3+
Type of boiler B22 - C12 - C32 - C42 - C52 - C62 - C82
Nominal heating power (Qn) maximum 34.5 kW
minimum 14 kW
Useful nominal output (Pn) maximum 32.4 kW
minimum 12.19 kW
Max/min useful efficiency at Pn 93.7/87.1 %
Useful efficiency at 30% of Pn 90.7 %
Flue gas temperature (∆T) at Pn max 99 101 103 °C
Flue gas temperature (∆T) at Pn min 83.5 87 88 °C
Flue gas mass flow rate at Pn max 0.012 0.013 0.013 kg/s
Flue gas mass flow rate at Pn min 0.004 0.005 0.005 kg/s
CO2 at Pn max 7.46 8.22 7.71 %
CO2 at Pn min 2.84 3.2 3.3 %
CO at Pn max (0% of O2) 61.5 156 98 mg/kWh
CO at Pn min (0% of O2) 86.7 235 207 mg/kWh
NOx at Pn max (0% of O2) 219 290 281 mg/kWh
NOx at Pn min (0% of O2) 190 165 162 mg/kWh
Class NOx 2
Maximum permitted temperature 90 °C
Maximum permitted pressure for heating circuit 3 bar
Boiler water content 2 l
Water heater water content 50 l
Electrical power supply 230~50 V~Hz
Electrical power absorbed 155 W
Degree of electrical protection X4D IP
Heating expansion tank volume 8 l
Heating expansion tank preload 1 bar
Stack loss with burner on at Pn max 5.5 %
Stack loss with burner off 0.1 %
Mantle loss at Pn max 0.8 %
∆p minimum at air pressure switch 1.88 mbar
Noise 47 dB
Energy efficiency marking (EEC 92/42) ★ ★ ★
DESCRIPTION ALMA 32 MBS W TOP

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GENERAL
ENGLISH
IDENTIFICATION
The ALMA boiler is identifiable by the labels on the packaging and the TECHNICAL DATA PLATE found inside the boiler
as shown in the figure.
WARNING
•Tampering with, removing, missing identification plates or anything else that does not allow certain identification of the
product makes any installation and maintenance operation difficult.

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GENERAL
HYDRAULIC CIRCUIT
ASanitary hot water outlet
BSanitary cold water inlet
CGas
DSystem return
ESystem delivery
1Magnesium anode
2Water heater sensor
3Water heater
4Ignition electrode
5Control electrode
6Exchanger
7Fan
8Flue gas pressure switch
9Thermometer
10 Delivery sensor
11 Full safety thermostat
12 Return sensor
13 Burner
14 Expansion tank
15 Automatic air escape valve
16 Circulator
17 Heating safety valve
18 Safety flow switch
19 Filling cock
20 3-way electric valve
21 Modulating coil
22 Gas valve
23 Pressure outlet
24 Sanitary water safety valve
25 Non-return valve
26 Sanitary water expansion tank
27 Flow regulator
28 Discharge cock
29 Vent cock

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GENERAL
ENGLISH
CONTROL PANEL
The ALMA boilers are equipped with the instruments shown below.
DBoiler status display
P1 Boiler function selection button (Summer/Winter - ON/OFF)
P2 Cyclic function selection
P3 Heating temperature increase button
P4 Heating temperature decrease button
P5 Sanitary water temperature increase button
P6 Sanitary water temperature decrease button
The display shows 3 digits and some symbols that indicate the boiler operating mode.
The symbols and their functions are indicated in the table below:
During normal operation the heating delivery temperature is displayed in °C.
In the event of a display failure, the system continues functioning with the previous settings.
Symbol Name
Cock
Radiator
Flame
Temperature
Locked flame
Winter
Summer
Curves (K factor)
Arrows
Letter t
Fixed: boiler in sanitary water mode
Fixed: boiler in heating mode
Flashing: burner on in maintenance function
Fixed: burner on
Flashing: set point curve
Fixed: external temperature display
The parameter displayed is a temperature
Boiler locked
Boiler in winter mode
Boiler in summer mode
Communication with remote control
Test function active
Meaning

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GENERAL
BUTTON FUNCTION SYMBOL
DISPLAY
Pressing the button for 3 seconds the following functions are displayed:
Summer ----> Winter
Holding the button pressed down for 3 seconds the boiler switches off.
Pressing the button the following information is cyclically displayed:
Sanitary water temperature
Heating temperature
Return to main menu.
With external sensor (optional):
Sanitary water temperature
Heating temperature
External temperature display
K parameter value display
Return to main menu
The info window is displayed for a maximum of 15 seconds if no button is pressed and
then returns to the main view.
Holding the button pressed down for 10 seconds the “Test” function is accessed.
Upon activation, the display is reset for a few seconds after which heating is activated
at full power for 15 minutes with the temperature set to 85°C.
When this function is active, the sanitary water mode is disabled.
The function is deactivated (OFF) by holding the button P1 pressed down or after 15
minutes if no button is pressed.
With remote control (optional):
The presence of the remote control is indicated on the display with the symbols shown
on the side.
Pressing the button the heating temperature is increased (max 83°C). If the external
sensor is present, see the functions on page 61.
Pressing the button the heating temperature is decreased (min. 30°C). If the external
sensor is present, see the functions on page 61.
Pressing the button the sanitary water temperature is increased (max 60°C).
Pressing the button the sanitary water temperature is decreased (min. 30°C).
P1
P2
P3
P4
P5
P6
Display lighting
The system provides for backlighting which is activated for 4 seconds when any one button is pressed and remains on
during display of parameter programming. A flashing signal indicates that there is a board fault.
Winter
Summer
flashing
flashing and “K”
value fixed
and
flashing
t
flashing
and
flashing
with

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GENERAL
ENGLISH
PARAMETER PROGRAMMING
Simultaneously press the buttons P2 and P3 for 10s to access the programming menu where the left digit indicates the
parameter number, and the centre and right digits the parameter value.
When the programming menu has been accessed, the left digit will blink; use the P3 and P4 buttons to change the para-
meter number, and the P5 and P6 buttons to change the value which will immediately be stored.
While changing the parameter, the system will check that the permitted limits are not exceeded.
Parameters displayed:
1Boiler model - 0 Fast with plates - 1 Bithermal - 2 Thermo+Water heater - 3 Water heater
2 Gas type selection - 0 Natural gas - 1 LPG
3 Maximum heat output: Range 0-100% (preset to 100%)
4 Heating restart timing: Range 0-20 = tmin 0-10 (preset to 4 = 2 min)
5 Ignition power: Range 0-75% (preset to natural gas 40% and LPG 35%)
6 Heating temperature adjustment range (preset to 1=30 - 83°C). Range 0=30 - 45°C (floor heating)
7 Heating pump post-circulation time setting: Range 0-20 (0-10 minutes) (Preset to 4 = 2 minutes)
8 Anti-Legionella function activation with boiler/water heater: 1 active, 0 inactive (preset to 1)
9 Do not use. (parameter not handled “--”)
0 Water heater pump post-circulation time setting: Range 0-20 (0-10 minutes) (preset to 4=2 minutes).
To exit the menu, press the P1 button or wait 20s without pressing any button.

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GENERAL
DESCRIPTION OF OPERATION AND FUNCTIONS
HEATING MODE
The heating operating mode starts if requested by the ambient thermostat and if the operating selector is set to
“WINTER”.
The circulator, fan (MBS) and switching valve are activated and, after checking that there is air flow, burner ignition is
requested.
When the “slow ignition time” from flame detection has elapsed, the burner power goes to the minimum value set and
reaches the maximum value within about 50 seconds.
The burner stops when the set heating temperature has been reached or when the ambient thermostat intervenes. The
intervention of the ambient thermostat also activates a post-circulation cycle (heating) after which the circulator is turned
off and the switching valve returns to the sanitary water position.
WATER HEATER ELECTRIC SWITCHING VALVE
The sanitary water mode with water heater starts when the water heater sensor reads a temperature lower than the “water
heater ON temperature”. The switching valve is then driven into sanitary water position and the system pump is activated,
and both remain active even at the end of the water heater request for post-circulation. In the event of concurrent requests,
the water heater is given priority and at the end the switching valve is switched to heating and water heater post-circulation
is reset.
During operation in sanitary water mode, the switching valve relay remains in rest position.
Fault Code
Failed ignition lock 01
Safety thermostat intervention lock 02
No water 03
Air pressure switch (MCS)/flue gas thermostat (MC) 05
NTC heating sensor fault 07
NTC sanitary water sensor fault 09
WARNINGS
For each operating mode one or more symbols appear on the LCD display.
In the event of a fault, the display will show a code whose meaning is summarised in the following table:
LOCK/RESET
If the boiler fails to ignite at the first attempt, there is an interventilation time and then a further two ignition attempts. For
LPG boilers only 1 ignition attempt remains active.
When this time has elapsed and ignition has failed, a non-volatile locking stop occurs (stored).
“Failed ignition lock 01” fault.
Reset the boiler by simultaneously pressing the P1 and P2 buttons. Remember that you can only reset the boiler a maximum
of 5 consecutive times both from the boiler control panel and from a remote control. After this, the boiler can only be reset:
- after 1h (1 additional reset every hour is permitted);
- by cutting the power.

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GENERAL
ENGLISH
Description
Circulator activation temperature for anti-freeze 8 °C
Circulator deactivation temperature for anti-freeze 10 °C
Burner activation temperature for anti-freez 6 °C
Anti-freeze function deactivation temperature 15 °C
Burner output during anti-freeze minimum
Post-circulation for intervention of anti-freeze function 200 s
HEATING PUMP ANTI-LOCKING FUNCTION
An anti-locking function activates the circulator for 30 seconds every 24 hours of inactivity. Following a power failure, the
first anti-locking intervention occurs after 1 hour of inactivity. The function is active even when operation is locked and
the selector is set to OFF.
SWITCHING VALVE ANTI-LOCKING FUNCTION
An anti-locking function activates the switching valve for 30 seconds every 24 hours of inactivity. Following a power
failure, the first anti-locking intervention occurs after 1 hour of inactivity. The function is active even when operation is
locked and the selector is set to OFF.
ANTI-LEGIONELLA FUNCTION
In the boiler version with water heater the anti-Legionella function can be activated/deactivated by acting on the display.
The function is activated once every two weeks (336 hours), forcing the water heater setpoint to 70°C, and is deactivated
when the water temperature in the water heater remains > 70°C for 15 min. Should a sanitary water request reduce the
temperature to a value < 70°C, the time already elapsed is stored. When the temperature once again exceeds 70°C, the
function continues from the time previously elapsed until reaching 15 min.
A timer is in any case activated when the anti-Legionella function starts and deactivates the function after a maximum time
of 30 minutes. The timer does not stop if sanitary water is drawn.
ANTI-FREEZE FUNCTION
The boiler is equipped with an anti-freeze function. When the water temperature read by the delivery sensor drops to below
the “pump activation temperature for anti-freeze”, the pump is activated to put the water back into circulation.
Should the temperature drop even further to the “burner activation temperature for anti-freeze”, also the burner will start
waiting for the delivery temperature to exceed the “anti-freeze deactivation temperature” beyond which the burner is tur-
ned off and a post-circulation cycle is activated. The function remains active even if the heating selector is set to OFF,
SUMMER and WINTER.

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GENERAL
FAN AND AIR FLOW CHECK (MBS MODELS)
If an ignition request is received, the system checks for the absence of air flow (contact open) of the flue gas pressure
switch, and if the test is passed the fan is activated. When air flow is detected (contact closed) the ignition sequence
is started.
If no air is detected for 15 seconds (e.g. fan failure) a fault is signalled and the system waits for the air detection signal.
Each time the burner is turned off, a post-ventilation cycle is run for 10 seconds.
If a new ignition request arrives during this period, the fan remains active, and if air flow is detected, the re-ignition
phase starts.
In the event of a lock with post-ventilation still in progress, a reset is permitted (the warning disappears), but the boiler can
only be restarted after the system reset time has elapsed.
At each power on/reset, the system automatically checks the type of boiler.
If there is a heat request and air is detected when the fan is off, a fault is signalled.
WATER CHECK
In the case of a boiler/water heater with switching valve, pump circulation is checked via a flow switch connected to the
same inlet as the water pressure switch and the following test cycle is activated. If there is a heat request, the circulator
is activated. If the circulation safety microswitch is switched, the ignition sequence is started. Otherwise, the circulator
continues operating for 6 minutes, after which it is alternately activated for 15s and deactivated for 45s in order to prevent
overheating the circulator. The circulator ON/OFF cycles continue until circulation is detected. If the circulator is inactive
for more than 30 minutes, the first ON cycle is extended to 6 minutes.
The failed circulation fault is displayed during the OFF periods of the circulator. It is not checked whether the circulation
safety microswitch is in short-circuit.
TEST FUNCTION
Activate the function by holding down the INFO button for 10 seconds or by acting on the parameter from the remote
control. While the function is active, the display shows the delivery temperature (blinking) and the symbol “t” while the
burner is driven at maximum power. The function is deactivated when the test function time has elapsed (15 minutes),
or by setting the boiler to OFF. A concurrent sanitary water request activates heat dissipation through the sanitary water
circuit activating the tap symbol on the display.
SENSOR FAULT
In the event of a delivery sensor fault (break or short-circuit), the burner is immediately turned off and the fault signalled.
In the case of operation in heating mode, if the burner was on, a post-circulation cycle is run.
A sensor short-circuit is detected when the resistance is less than about 200 Ohm
A sensor break is detected when the resistance values are Rntc >> 34 Kohm.
In the fast boiler model with plate exchanger, provision has been made for operation with one sensor in the event of a
fault due to failure or short-circuit of the sanitary water sensor. The fault is displayed but the boiler continues functioning
in sanitary water and heating mode.

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GENERAL
ENGLISH
HEATING MODE WITH EXTERNAL SENSOR (OPTIONAL)
Operation is the same as in normal heating mode with the difference that the delivery temperature is calculated in relation
to the external temperature read by the sensor and the K factor.
The K factor is set with the P3 and P4 buttons.
N.B.: The graphs show the temperature trend with the normal heating setpoint range.
If the heating range for a floor-mounted system were selected, the curves would fall within the temperature range for the
floor however maintaining the same “K” slope.
EXTERNAL SENSOR INSTALLATION
The external sensor, which can be requested as optional, is used to improve the operating performance of the boiler.
It must be installed on an external wall, possibly north-facing, and in any case in a position protected against sunlight
and/or other heat sources.
External temperature (°C)
System delivery (°C)
HEATING TEMPERATURE INCREASE BUTTON
HEATING TEMPERATURE DECREASE BUTTON
P3
P4

- 62 -
GENERAL
OPERATION WITH REMOTE CONTROL (OPTIONAL)
The boiler can be operated with a RC03.54 remote control.
The RC03.54 remote control is an intelligent hourly programmer complete with ambient sensor suitable for adjustment and
control of wall-mounted gas boilers for heating and production of sanitary hot water mainly for installation in residential
buildings.
With the remote control connected to the boiler, the controls are divided as follows:
Controls on control panel:
- Operating mode selector: OFF/SUMMER/WINTER
- Parameter setting menu
- Reset (see “LOCK/RESET on page 58)
The following controls are managed by the remote control:
- Sanitary water temperature setting
- Delivery temperature setting.
If communication is interrupted or the remote terminal is disconnected, the system continues operating for a certain
time with the same setting as before the interruption waiting for communication to be re-established (“communication
timeout”).
If communication is not re-established after the timeout, the system goes into normal operating mode as if the remote
control were not connected, resuming all the controls.
As well as the programming function the remote control also allows:
- Setting and displaying the parameters
1Boiler model - 0 Fast with plates - 1 Bithermal - 2 Thermo+Water heater - 3 Water heater
2Gas type selection - 0 Natural gas - 1 LPG
3Maximum heat output: Range 0-100% (preset to 100%)
4 Heating restart timing: Range 0-20 = tmin 0-10 (preset to 4 = 2 min)
5Ignition power: Range 0-75% (preset to natural gas 40% and LPG 35%)
6 Heating temperature adjustment range (preset to 1=30 - 83°C). Range 0=30 - 45°C (floor heating)
7 Heating pump post-circulation time setting: Range 0-20 (0-10 minutes)(Preset to 4 = 2 minutes)
8Anti-Legionella function activation with boiler/water heater: 1 active, 0 inactive (preset to 1)
9Activation/deactivation of the test function: 1 Active; 0 Inactive (preset to 0)
10 Do not use
- Displaying the faults (see “parameter programming” on page 57).
The K value settings described on page 61 are exclusively done from the remote control.
ELECTRICAL CONNECTION
The remote control is connected directly to the board as shown in the connection diagram.
Electrical characteristics of the communication line:
Number of wires: 2 to be connected to the TA contacts (ambient thermostat)
Cable type: bipolar (*)
Maximum line length: 50 metres
Maximum cable resistance: 2x5Ώ
Polarity: no polarity.
(*) In environments with high electrical noise, a screened or twisted cable must be used.