Opera - Central heating boiler FERROLI - Free user manual and instructions

USER MANUAL Opera FERROLI

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• ouuov;v7;b7-v--ul-;m-l;m|obm-7;t-7oĺB The CE marking certifies that the products meet the essential requirements of the rele- vant directives in force. The declaration of conformity may be requested from the manufacturer. COUNTRIES OF DESTINATION: IT - ES - RU This symbol indicates “CAUTION” and is placed next to all safety warnings. Strictly follow these instructions in order to avoid danger and damage to persons, animals and things This symbols calls attention to a note or important notice. This symbol, which is used on the product, packaging or documents, means that at the end of its useful life, this product must not be collected, recycled or disposed of together with domestic waste. Improper management of electric or electronic waste can lead to the leakage of hazardous substances contained in the pro- duct. For the purpose of preventing damage to health or the environment, users are kindly asked to separate this equipment from other types of waste and to ask for it to be dealt with by the municipal waste service or dealer under the conditions and according to the methods set down in national and international laws transposing the Directive 2012/19/EU. Separate waste collection and recycling of unused equipment helps to save natural resources and to guarantee that this waste is processed in a manner that is safe for health and the environment. For more information about how to collect electric and electronic equipment and appliances, please contact your local Council or Public Authority competent to issue the relevant permits. OPERA 139EN cod. 3541R966 - Rev. 00 - 01/2024
• Read the warnings in this instruction booklet carefully since they provide important information on safe installation, use and maintenance.

• This instruction booklet is an integral and essen- tial part of the product and must be kept with care by the user for future reference.

• If the unit is sold or transferred to another owner or if it is to be moved, always make sure the booklet stays with the boiler so that it can be con- sulted by the new owner and/or installer.

• Installation and maintenance must be carried out by professionally qualified personnel, according to current regulations and the manufacturer's in- structions.

• Incorrect installation or inadequate maintenance can result in damage or injury. The manufacturer declines any liability for damage caused by errors in installation and use or by failure to follow the in- structions provided.

• Before carrying out any cleaning or maintenance operation, disconnect the unit from the power supply using the system switch and/or the special cut-off devices.

• In case of a fault and/or poor operation, deacti- vate the unit and do not try to repair it or directly intervene. Contact professionally qualified per- sonnel. Any repair/replacement of the products must only be carried out by qualified personnel using genuine parts. Failure to comply with the above can compromise the safety of the unit.

• Periodic maintenance performed by qualified personnel is essential in order to ensure proper operation of the unit.

• This unit must only be used for its intended pur- pose. Any other use is deemed improper and therefore hazardous.

• After unpacking, check the good condition of the contents. The packing materials are potentially hazardous and must not be left within the reach of children.

• The unit can be used by children aged at least 8 years and by persons with reduced physical, sen- sory or mental capabilities, or lacking experience or the necessary knowledge, only if under super- vision or they have received instructions on its safe use and the related risks. Children must not play with the unit. Cleaning and maintenance in- tended to be done by the user can be carried out by children aged at least 8 years only if under su- pervision.

• In case of doubt, do not use the unit. Contact the supplier.

• The unit and its accessories must be appropriate- ly disposed of in compliance with current regula- tions.

• The images given in this manual are a simplified representation of the product. In this representa- tion there may be slight and insignificant differ- ences with respect to the product supplied.OPERA

Dear Customer, Thank you for choosing OPERA, a floor-standing boiler FERROLI featuring advanced design, cutting-edge technology, high reliability and quality construction. Please read this manual carefully, as it provides important information on safe installation, use and maintenance. OPERA is a high efficiency, low emissions premix condensing heat generator for heating, running on natural gas or LPG and equipped with a microprocessor control system. The boiler body consists of a patented helical tube stainless-steel exchanger and a steel premix burner, equipped with electronic ignition with ionization flame control, modulating speed fan and modulating gas valve. OPERA is a heat generator arranged to operate alone or in cascade FERROLI supplies on request all the hydraulic accessories and smoke manifolds for the connection of 2 or 3 units in cascade in configurations of 70 + 70 kW to 450 + 450 + 450 kW.

fig. 1 - Control panel Legend 1 = Contextual button 12 = Contextual button 23 = Contextual button 34 = Dot matrix display (example main screen)5 = Menu navigation button6 = Confirm/menu access button7 = Menu navigation button8 = Automatic/Manual Heating/DHW button9 = Summer/Winter mode selection button10 = Economy/Comfort mode selection button11 = Menu exit button12 = Main menu button13 = Home button (back to main screen)14 = Main switch

SOPERA 142 EN cod. 3541R966 - Rev. 00 - 01/2024 Contextual button The contextual buttons (details 1, 2, 3 - fig. 1) are grey, with no screen print, and take on a different meaning depending on the menu selected. It is essential to observe the indication provided by the display (icons and text). In fig. 1 for exam- ple, using the contextual button 2 (detail 2 - fig. 1) it is possible access unit information such as: temperature of sensors, work power, etc. Direct buttons The direct buttons (details 8, 9, 10 - fig. 1) always have the same function. Menu/navigation buttons The menu/navigation buttons (details 5, 6, 7, 11, 12, 13 - fig. 1) are used to navigate among the various menus imple- mented in the control panel. Menu structure From the Home page, press the main Menu button (detail 12 - fig. 1). fig. 2 Access the "User" menu by pressing contextual button 1 (detail 1 - fig. 2). Then use the "menu navigation" buttons to access the different levels described in the following table. USER MENUHEATING Adjustment TempSee fig. 13 Reduction Adjustment TempSee fig. 14Sliding Temperature Curva1See fig. 28 Offset1See fig. 29 Heating Off External TempSee page 152 Curva2 Offset2 Time Program menuSee “Time programming” on page 147DOMESTIC HOT WATER Adjustment TempSee fig. 15 Reduction Adjustment TempSee fig. 16 Legionella See “Legionella programming (with optional hot water tank installed)” on page 150 Time ProgramSee “Time programming” on page 147VACATION FUNCTIONSee “Holiday Function” on page 151 USER TECHNICIAN MENU

12OPERA 143EN cod. 3541R966 - Rev. 00 - 01/2024 Indication during operation Heating A heating request (generated by Room Thermostat or Remote Timer Control or 0-10 Vdc signal is indicated by activa- tion of the circulating pump and by the hot air above the radiator (fig. 3). DHW circuit (with optional hot water tank installed) A hot water tank heating request is indicated by activation of the droplet under the faucet (fig. 5 and fig. 6). MAINTENANCE Test Mode Test Mode See fig. 64 Gas Type Selection See fig. 63 Cascade Test Mode See “CASCADE TEST mode activation” on page 179 Service Information See “Service Information” on page 151 Service Intervention Date See “Service Intervention Date” on page 151 SETTINGS Language See fig. 8 Unit of measure

Date setting See fig. 9 Time setting See fig. 10 "Heating only/Double circulating pump” configuration fig. 3 "Circulating pump and 3-way valve” configuration fig. 4 "Double circulating pump” configuration fig. 5 "Circulating pump and 3-way valve” configuration fig. 6 Thursday 9 Jan. 2014 11:25:4023°C -- Thursday 9 Jan. 2014 11:25:4023°C 32°C Thursday 9 Jan. 2014 11:28:2223°C 32°C Thursday 9 Jan. 2014 11:29:2723°C 32°COPERA 144 EN cod. 3541R966 - Rev. 00 - 01/2024 Exclude hot water tank (economy) Hot water tank temperature maintaining/heating can be excluded by the user. If excluded, domestic hot water will not be delivered. The hot water tank can be deactivated by the user (ECO mode) by pressing the eco/comfort button (detail 10 - fig. 1). In ECO mode the display activates the symbol . To activate COMFORT mode, press the eco/comfort button (de- tail 10 - fig. 1) again. fig. 7- Economy Information From the main screen (Home), press the contextual button 2 (detail 2 - fig. 1). Then use the "Menu Navigation" buttons to display the following values: Thursday 9 Jan. 2014 11:30:4323°C 32°C Heating demand OT means OpenTherm control demand TA means room thermostat demand 0-10Vdc means 0-10Vdc signal demand TA2 means second room thermostat demand Heating circulating pump ON/OFF Heating 3-way valve ON/OFF DHW 3-way valve ON/OFF Standby time ON/OFF T Delta protection ON/OFF Flame Supervisor ON/OFF Heating sensor1 °C Heating sensor2 °C Return sensor °C DHW sensor °C External probe °C Fume sensor °C Cascade heating sensor °C Fan frequency Hz Burner load % System water pressure 1.4bar = ON, 0.0 bar = OFF Modulating circulating pump % Cascade modulating circulating pump % Ionisation current uA Input 0-10Vdc Vdc Heating adjustment temperature Setpoint (°C) Power level adjustment 0-10Vdc Setpoint (%)OPERA 145EN cod. 3541R966 - Rev. 00 - 01/2024

1.3 Lighting and shutdown

Boiler lighting Press the On/Off button (detail 14 - fig. 1).By pressing contextual button 1 it is possible to choo-se the desired language and confirm it with the “OK”button.By pressing contextual button 3 it is possible to inte-rrupt the FH mode.If neither of the two choices described above is made,continue as follows.• For the following 300 seconds the display will showFH which identifies the heating system air ventingcycle.• The display also shows the firmware version of thecards.• Open the gas cock ahead of the boiler.• When the message FH disappears, the boiler isready to operate automatically in case of a roomthermostat request.fig. 8- Boiler lighting Settings Contrast adjustment To adjust the display contrast, press the contextual button 2 and the OK button together. Then press the button ref. 5 of fig. 1 to increase the contrast or the button ref. 7 of fig. 1 to decrease it. Date and Time Adjustment Reach the screen shown in fig. 9, navigating in themenu and following the path "USER MENU “Set-tings” "Date Setting”. Press navigation buttons 5and 7 to select the value and modify it with contextualbuttons 1 and 2. Confirm with the OK button.fig. 9- Date AdjustmentReach the screen shown in fig. 10, navigating in themenu and following the path "USER MENU “Set-tings” "Time Setting". Press navigation buttons 5and 7 to select the value and modify it with contextualbuttons 1 and 2. Confirm with the OK button.fig. 10- Time Adjustment Display v.01Burner Controller 1 v.01 to confirmSet date 24 / 09

to confirm Set time 15 : 59 to select

2OPERA 146 EN cod. 3541R966 - Rev. 00 - 01/2024 Boiler shutdown From the main screen/Home, press the contextual bu-tton and confirm with the button .When the boiler is turned off, the PCB is still powered.Domestic hot water (with optional hot water tank insta-lled) and heating operation are disabled. The frost pro-tection system remains on.To relight the boiler, press the contextual button again The boiler will be immediately ready to operate whe-never domestic hot water is drawn (with optional hotwater tank installed) or in case of a room thermostatrequest.To completely disconnect the unit from the power su-pply, press the button detail 14 fig. 1.fig. 11- Turning the boiler off

The frost protection system does not work when the power and/or gas to the unit are turned off. To avoid damage caused by freezing during long shutdowns in win- ter, it is advisable to drain all water from the boiler, the DHW circuit and the heating system water; or drain just the DHW circuit and add a suitable antifreeze to the heating system, as prescribed in sec. 2.3.

Summer/Winter Switchover Press the button (detail 9 - fig. 1) for 1 second.The display activates the Summer symbol. The hea-ting function is deactivated while possible DHW pro-duction remains active (with optional external hotwater tank). The frost protection system remains on.To deactivate Summer mode, press the button (detail 9 - fig. 1) again for 1 second.fig. 12- Summer Heating temperature adjustment Access the “Adjustment Temp” menu to vary thetemperature from a minimum of Tmin to a maximumof TMax. Confirm with the OK button.

The boiler comes with the time program not activated. Therefore, if requested, this is the setpoint value. fig. 13 Thursday 9 Jan. 2014 00:15:60 Thursday 9 Jan. 2014 11:33:03 23°C 32°C CH setpoint to confirm 80OPERA 147EN cod. 3541R966 - Rev. 00 - 01/2024Heating temperature reductionAccess the “Reduction Adjustment Temp” menu tovary the temperature from a minimum of 0°C to amaximum of 50°. Confirm with the OK button. This parameter is used only if time program-ming is activated. See *** 'Time program-ming' on page 147 ***fig. 14DHW temperature adjustment (with optional hot water tank installed)Access the “Adjustment Temp” menu to vary thetemperature from a minimum of 10°C to a maximum of65°C. Confirm with the OK button.

The boiler comes with the time program not activated. Therefore, if requested, this is the setpoint value. fig. 15DHW temperature reduction (with optional hot water tank installed)Access the “Reduction Adjustment Temp” menu tovary the temperature from a minimum of 0°C to amaximum of 50°C. Confirm with the OK button. This parameter is used only if time program-ming is activated. See *** 'Time program-ming' on page 147 ***fig. 16Time programmingTime programming is done in the same way both for heating and for DHW; the two programs are independent. To program Heating, access the “Time Program” menu by following the path “USER MENU “HEATING” “Time Program”. To program DHW, access the “Time Program” menu by following the path “USER MENU “DOMESTIC HOT WATER” “Time Program”. CH setpoint reductionto confirm

to confirmCH setpoint

to confirmDHW setpoint reduction 25OPERA 148 EN cod. 3541R966 - Rev. 00 - 01/2024 Choose the type of programming to carry out and follow that described below.Select the day (fig. 17) or the interval of days to program (fig. 18) and confirm with the OK button. The program is weekly: this means that 6 independent time bands can be set for each day of the week (fig. 19); 4 options can be chosen for each time band:

• ON. In case of a Heating/DHW request, the boiler works at the set Heating/DHW Adjustment Temperature (fig. 13/ fig. 15).

• In case of a Heating/DHW request, the boiler works at the Reduced Adjustment Temperature. The Reduced tem- perature is obtained by subtracting the Reduction Adjustment Temperature (fig. 14/fig. 16) value from the set Hea- ting/DHW Adjustment Temperature (fig. 13/fig. 15).

• OFF. In case of a heating/DHW request, the boiler will not activate the Heating/DHW mode.

The boiler comes with the time program not activated. In fact, every day will be programmed from 00:00 to 24:00h in ON mode (fig. 19). First, set the start time of the first time band (fig. 19) using contextual buttons 1 and 2. fig. 19 Press navigation button 7 to go to the end time of the first time band (fig. 20) and set it to the desired value using contextual buttons 1 and 2. fig. 20 fig. 17 fig. 18 to confirmScheduler SetTuesdayWednesdayThursdayFridaySaturdaySundayMonday-SundayMonday

to confirmScheduler SetThursdayFridaySundayMonday-SundayMonday-FridaySaturday-SundayWednesdaySaturday

to confirm Scheduler Set

to confirm Scheduler Set

2OPERA 149EN cod. 3541R966 - Rev. 00 - 01/2024 Press navigation button 7 and use contextual buttons 1 and 2 to set the work mode during the first time band (fig. 21) fig. 21 Then, press navigation button 7 to set (if necessary) the subsequent time bands (fig. 22, fig. 23 and fig. 24). fig. 22 fig. 23 fig. 24 When the day has been programmed, press the OK button; the item “Save & Exit” will automatically be se- lected (fig. 25). Use navigation buttons 5 and 7 to mo- dify the previous settings or press OK to confirm: in this case the display will return to showing the day (fig. 17) or the interval of days to be programmed (fig. 18). The same procedure can then be followed to complete the desired weekly program. To program the following day in the same way, select “Copy to next day” and press OK to confirm (fig. 25). fig. 25 to confirmScheduler Set

to confirmScheduler Set

to confirmScheduler Set

to confirmScheduler Set

to confirmScheduler Set

The two Heating and DHW hourly programs are independent even in case of Reset to factory value. Legionella programming (with optional hot water tank installed) To enable the Anti-Legionella Function it is necessary to set parameter P23, within the "TECHNICAL MENU”, to ON. To program the function it is necessary to access the “Legionella” menu via the path “USER MENU” “DOMESTIC HOT WATER” “Legionella”.In this menu it is possible to set the following options:

• Anti-Legionella day. Defines the day of the week during which the function will be activated. The function can only be activated once a week.
• Anti-Legionella time of day. Defines the start time of the function.

• Anti-Legionella duration. Defines the duration (in minutes) of the function.

• Anti-Legionella Adjustment Temp. Defines the DHW Adjustment temperature during the function.

• In ECO mode the function is not active.

• The Anti-Legionella Function will only be active if the boiler is set to “Automa- tic” mode” ( ) and only in the time bands set to ON or to “Reduced tem- perature” ( ). Otherwise, in the time bands set to OFF, the function will not be activated, even if set.

• In vacation mode ( ) the Anti-Legionella Function is active.

• If the Anti-Legionella Func- tion is not carried out correct- ly, the message shown in fig. 27 is displayed. Even in the presence of this message, the boiler will continue to operate correctly. fig. 27- Message Anti-legionella function not completed

If a circulating pump is installed in the system, for water circulation during the Anti-Legionella Function, pa- rameter b08 must be set to 1. In this way the contact between terminals 9-10 (ref. 300 - fig. 95, fig. 96 and fig. 97) closes when the function is activated. to confirmScheduler SetTuesdayWednesdeyThursdayFridaySaturdaySundayMonday-SundayMonday

• Holiday end date. The display can activate two types of icons:

• - The Holiday function is programmed but not yet active.

• - The Holiday function is in progress. The boiler will behave as if Summer mode and Economy mode were active (with optional hot water tank installed). The frost protection and Legionella functions will remain active (if activated). Service Intervention Date This informs when the alert of programmed maintenance by the technician will be activated. It does not represent an alarm or a fault but just a notice. After that date, whenever the Main menu is accessed, the boiler will activate a screen indicating that programmed maintenance is due. Service Information This information shows the telephone number to contact in case of assistance (if programmed by the technician). Room temperature adjustment (with optional room thermostat) Using the room thermostat, set the temperature required in the rooms. Room temperature adjustment (with optional remote timer control) Using the remote timer control, set the temperature desired in the rooms. The boiler unit will set the system water ac- cording to the required room temperature. For information on the remote timer control, please refer to its user's manual. Sliding Temperature When the external probe (optional) is installed, the relevant external temperature symbol is activated on the control pa- nel display. The boiler control system works with "Sliding Temperature". In this mode, the heating system temperature is regulated according to weather conditions, to ensure high comfort and energy efficiency throughout the year. In par- ticular, as the outside temperature increases the system flow temperature decreases according to a specific "compen- sation curve". With Sliding Temperature adjustment, the "Heating adjustment" temperature becomes the maximum system flow tem- perature. It is advisable to set a maximum value to allow system adjustment throughout its useful operating range. The boiler must be adjusted at the time of installation by qualified personnel. The user can still make further adjustments for better comfort. Compensation curve and curve offset Access the Sliding Temperature menu. Adjust the desired curve from 1 to 10 according to the characte- ristic (fig. 30) via the parameter “Curve1” and confirm with the OK button. By setting the curve to 0, the sliding temperature ad- justment is disabled. fig. 28- Compensation curve OTC Curve 1to confirm 1OPERA 152 EN cod. 3541R966 - Rev. 00 - 01/2024Adjust the parallel offset of the curves from 20 to 60 °C(fig. 31), via the parameter “Offset1” and confirm withthe OK button.fig. 29- Parallel curve offset If the room temperature is lower than the desired value, it is advisable to set a higher order curve and vice versa. Pro- ceed by increasing or decreasing in steps of one and check the result in the room.fig. 30- Compensation curvesfig. 31- Example of compensation parallel curve offset

This parameter is used only if the time programming has been activated. See *** 'Time programming' on page 147 *** Outside Temperature Heating OFF Access the “Out Temp Heat Off” to activate the function: between 7°C and 30°C. If activated, this function will deactivate the heating demand whenever the temperature measured by the external probe is higher than the programmed value. The heating demand will be reactivated as soon as the temperature measured by the external probe is lower than the programmed value. OTC Offset 1to confirm

OFFSET = 20 OFFSET = 60OPERA 153EN cod. 3541R966 - Rev. 00 - 01/2024 Adjustments from remote timer control

If the boiler is connected to the Remote Timer Control (optional), the previously described adjustments are managed as described in table 1. Table 1 System water pressure adjustment The filling pressure with the system cold must beapprox. 1.0 bar. If the system pressure falls to valuesbelow minimum, the boiler card will activate fault 37and the number of the module (fig. 32). Once the system pressure is restored, theboiler will activate the 300-second air ventingcycle indicated on the display by FH.fig. 32- Module 1 insufficient system pressure fault Heating temperature adjustment Adjustment can be made from the Remote Timer Control menu and the boiler control panel. DHW temperature adjustment (with optional hot water tank installed)Adjustment can be made from the Remote Timer Control menu and the boiler control panel. Summer/Winter Switchover Summer mode has priority over a possible Remote Timer Control heating request. Eco/Comfort selection (with optional hot water tank installed)On disabling DHW from the Remote Timer Control menu, the boiler selects Economy mode. In this condition, the button detail 10 - fig. 1 on the boiler panel, is disabled. By enabling DHW from the Remote Timer Control menu, the boiler selects Comfort mode. In this condition, use the button detail 10 - fig. 1 on the boiler panel to select one of the two modes. Sliding Temperature Both the Remote Timer Control and the boiler card manage the Sliding Temperature adjust- ment: between the two, the Sliding Temperature of the boiler card has priority. Nr:37 Src:1OPERA 154 ENcod. 3541R966 - Rev. 00 - 01/2024

2.1 General Instructions

THE BOILER MUST ONLY BE INSTALLED BY QUALIFIED PERSONNEL, IN COMPLIANCE WITH ALL THE INS-TRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE CURRENT PROVISIONS OF LAW, THE NATIONAL ANDLOCAL REGULATIONS, AND THE RULES OF PROPER WORKMANSHIP.For Switzerland, the following installation regulations and directives must be applied:• SVGW - gas principles G1: installation Gas• EKAS - Form. 1942: liquid gas directive, part 2• Cantonal laws and regulations (e.g. fire safety regulations)OPERA is a heat generator arranged to operate alone or in cascade (bank). FERROLI supplies on request all the hydraulic accessories and smoke manifolds for the connection of 2 or 3 units in cascade in configurations of 70 + 70 kW to 450 + 450 + 450 kW. When OPERA generators are installed in cascade with the accessories foreseen by FERROLI, all the requirements of current laws and regulations applicable to such "equivalent” generator of total thermal capacity must be met. In particu- lar the place of installation, safety devices and fume exhaust system must be adequate for the total heating capacity of the bank of units. The instructions given in this manual concern both the single unit and the connection in cascade. For further information regarding installation of the generators in cascade, refer to the specific manual supplied with the cas- cade connection kits.

The boiler electronics are equipped with management functions for a cascade of up to 6 units. To create cas- cade systems with more than three units without using the accessories foreseen by FERROLI, suitably sized hydraulic/gas manifolds must be arranged, complete with all the safety devices required by current regulations, as well as individual fume exhausts or fume manifolds appropriately sized by a qualified technician.

2.2 Place of installation

The generator must be installed in a suitable room with ventilation openings towards the outside in conformity with cu- rrent regulations. If there are several burners or exhausters that can work together in the same room, the ventilation openings must be sized for simultaneous operation of all the units. The place of installation must be free of flammable materials or objects, corrosive gases, powders or volatile substances. The room must be dry and not exposed to rain, snow or frost. For positioning, leave sufficient room around the unit for normal maintenance operations. In particular, check that the burner door can open freely.

2.3 Plumbing connections

The heating capacity of the unit must be previously established by calculating the building's heat requirement according to current regulations. The system must be provided with all the components for correct and regular operation. In par- ticular, provide for all the protection and safety devices required by current regulations for the complete modular gene- rator. They must be installed on the hot water circuit flow piping, immediately after the last module, within a distance of not more than 0.5 m. and with no shutoff devices in between. The unit is not supplied with an expansion tank or safety valve; their connection must therefore be carried out by the Installer. This unit can operate correctly also with a minimum flow rate of 0 l/h and does not require post-circulation to eliminate the thermal inertia. With reference to par. “3.3. R3F file R edition 2009” the post-circulation time prescribed by the manufacturer is therefore equal to 0 seconds.

The safety valve outlet must be connected to a funnel or collection pipe to prevent water spurting onto the floor in case of overpressure in the heating circuit. Otherwise, if the discharge valve cuts in and floods the room, the boiler manufac- turer cannot be held liable.Do not use the water system pipes to ground electrical appliances.

Before installation, flush all the pipes of the system thoroughly to remove any residuals or impurities that could affect proper operation of the unit. Use chemical conditioners suitable for the purpose; i.e. able to remove from the walls and bottom of the pipes and the various components of the system, sludge, metalOPERA 155EN cod. 3541R966 - Rev. 00 - 01/2024 oxides and, in low temperature systems, also biomass, with just the circulation of the water, with system hot and/or cold. The products used must not be corrosive and/or aggressive for metals and plastics and must not significantly alter the natu- ral pH of the water.

Also, a filter must be installed on the system return piping to prevent impurities or sludge from the system clogging and damaging the heat generators. The filter must be installed when replacing generators in existing systems. The ma- nufacturer declines any liability for damage caused to the generator by failure to install or inadequate installation of this filter. Carry out the relevant connections according to the diagram in sec. 4.1 and the symbols on the unit. Table 2- SIZE OF CONNECTIONS In case of installation in bank, the water circuit of each boiler must be fitted with a motor-operated shutoff valve (contro- lled by the unit, see wiring diagram fig. 95) that prevents reverse circulation with the boiler not working. A single safety valve must also be provided for each boiler in accordance with the requirements of “file R”. The following optional kits are available for this purpose:

If the distribution system adjustment is independent of the electronics of the generators, the creation of a bypass between the flow manifold and that of the system return is advisable in order to protect the circulating pumps. System water characteristics Before installing the OPERA generator, the new or existing system must be properly cleaned in order to eliminate ins- tallation residues, solvents, sludge and contaminants in general that may compromise the effectiveness of the protective conditioning treatments. Use neutral cleaning products that do not attack metals, rubber and plastic parts of the gene- rator/system. Empty, wash and recharge the system in compliance with the following instructions. A dirty system will not guarantee the life of the generator over time, even with the use of protective conditioners.

OPERA boilers are suitable for installation in heating systems with non-significant entry of oxygen (ref. systems "case I” EN14868). A physical separator (e.g. plate heat exchanger) must be provided in systems with continuous entry of oxygen (e.g. underfloor systems without anti-diffusion pipes or open vessel), or frequent (fre- quent water replenishment). The water in a heating system must be treated in compliance with the laws and re- gulations in force, have the characteristics required by UNI 8065, and comply with the provisions of EN14868 (protection of metallic materials against corrosion). The filling water (first filling and subsequent replenishments) must be potable, clear, with hardness under the values indicated in the table below and treated and conditioned with chemical conditioners declared suitable by the maker (see following list), in order to prevent encrustations, corrosive or aggressive phenomena on the metals and plastics of the generator and system, the formation of gas, and the proliferation of bacterial or microbial masses in low temperature systems. MODEL 70 125

320 450System flow 1” 1/4 threaded 1” 1/4 threaded 2” threaded DN65 flanged DN65 flangedMain system return / LOW TEMPERATURE 1” 1/4 threaded 1” 1/4 threaded 2” threaded DN65 flanged DN65 flangedGas inlet 3/4” threaded 1” threaded 1” threaded 1” 1/4 threaded 1” 1/2 threadedOPERA 156 EN cod. 3541R966 - Rev. 00 - 01/2024 The water contained in the system, as well as the replenishment water, must be checked periodically (at every start-up of the system, after any non-scheduled intervention such as, for example, replacement of the generator or other system components, as well as at least once a year during mandatory routine maintenance operations as required by UNI 8065). The water must have a clear appearance and respect the limits given in the following table.

• In the presence of conditioners, the limit increases to 1200 µS/cm. In case of differing values or difficult verification of values with conventional analysis/testing procedures, contact the company for additional evaluations. The conditions of the feed water to be treated can vary even significantly depending on the geographical areas where the systems are located. Chemical conditioners deoxygenating, anti-scaling, corrosion inhibiting, anti-bacterial, anti-algae, frost protection, PH correction products, etc., must also be suitable for the materials of the generator and system. They must be put in the system respecting the quantity indicated by the supplier of the chemical product and verified in their concentration.

A chemical conditioner in insufficient concentration will not be able to ensure the required protection. Always check the product concentration each time it is added and cyclically, at least once a year, using qualified technical personnel such as our authorized tech- nical assistance network. Table 3- Chemical conditioners declared suitable and available at our network of Authorized Tech- nical Assistance Centers The unit is equipped with a frost protection system that activates the boiler in heating mode when the system delivery water temperature falls below 6°C. The device is not active if the power and/or gas supply to the unit is turned off. If necessary, for system protection use a suitable anti-freeze liquid that meets the same requirements as set out above and provided for by UNI 8065. In the presence of adequate chemical/physical system and feed water treatments and related high cyclicity controls able to ensure the required parameters, for industrial process applications the product can be installed in open-vessel sys- tems with vessel hydrostatic height able to ensure compliance with the minimum operating pressure indicated in the product technical specifications. To ensure the reliability and correct operation of the boilers, always install a mechanical filter in the loading circuit and, in the system, a dirt separator (possibly magnetic) and a deaerator as required by the UNI 8065 as well as a volumetric meter on the system replenishment line. EXISTING SYSTEM NEW SYSTEMWATER PARAMETERTotal filling water hardness (°f) <10 <10Total system water hardness (°f) <15 <10PH 7 < Ph < 8.5Copper Cu (mg/l) Cu < 0.5 mg/lIron Fe (mg/l) Fe < 0.5 mg/lChlorides (mg/l) Cl < 50 mg/lConductivity (µS/cm) < 600 µS/cm*Sulfates < 100 mg/lNitrates < 100 mg/lDescription Sentinel type alternative products LIFE PLUS/B - MOLY - MOLY K Molybdenum-based corrosion inhibitor X100 LIFE DUE Noise reduction/anti-scaling maintenance X200 BIO KILL Biocidal anti-algae X700 PROGLI Propylene frost protection X500 Products with equivalent characteristics may be usedOPERA 157EN cod. 3541R966 - Rev. 00 - 01/2024

Failure to comply with the provisions of this paragraph, "System water fea- tures", will involve non-recognition of the warranty and damage due to such shortcomings. Combustion chamber maintenance To ensure the efficiency and reliability of the generator over time, it is very important to contact our authorized technical assistance service, at least once a year, for routine maintenance operations and also for checking the combustion chamber and, if necessary, its cleaning. In this regard we recommend the use of the following products, checked and tested on our exchangers and available at our Authorized Technical Assistance Centers. Table 4- Products declared suitable and available at our network of Authorized Technical Assistan- ce Centers Given the aggressiveness of the chemical products for combustion chambers, always rely only and exclusively on qua- lified personnel and make safe the sensitive elements, such as the electrodes, insulating materials, etc., that could be- come damaged by direct contact with the product. Rinse well after each heat exchanger cleaning process (product application time 15-20 minutes) and repeat the operation as required.

Irrespective of the chemical products used, always make use of qualified technical personnel such as our authorized technical assistance network and manage the technological fluids according to the applicable local laws, rules and regulations. DescriptionBIO INF Liquid product for cleaning steel combustion chambersProducts with equivalent characteristics may be usedOPERA 158 EN cod. 3541R966 - Rev. 00 - 01/2024 Hydraulic circuit examples In the examples described below, the checking/change of some parameters may be required. To do this it is necessary to access the Technical menu. From the Home page, press the main Menu button (detail 12 - fig. 1). Access the "Technical" menu by pressing contextual button 2 (detail 2 - fig. 1). fig. 33 Enter the code "4 1 8" with contextual buttons 1 and 2. Confirm each number with the OK button. fig. 34 Access the Parameters menu by pressing the OK button. fig. 35 Access the "Configuration Menu" or "System Type Menu" according to the parameter to be modified as given in each hydraulic circuit example. fig. 36 USER TECHNICIAN MENU

to confirmTechnician menu 0 X X to select

to confirm Type Menu

to confirm Configuration Menu

PoOPERA 159EN cod. 3541R966 - Rev. 00 - 01/2024 Two direct heating circuits - Schematic diagram fig. 37 - Electrical connections After installation, carry out the necessary electrical connections as shown in the wiring diagram. Then configure the controller as described in the specific section. fig. 38 Legend (fig. 37 and fig. 38) 72 1st zone (direct) room thermostat 72b 2nd zone (direct) room thermostat 138 External probe 307 1st zone (direct) circulating pump 306 2nd zone (direct) circulating pump a 1st zone (direct) b 2nd zone (direct) M Flow R Return I* ISPESL safety devices (when required - not su- pplied) To manage the sliding temperature it is necessary to purchase the external probe accessory code 013018X0

72BOPERA 160 EN cod. 3541R966 - Rev. 00 - 01/2024 - Parameters Each system requires a different parameterisation. Follow the access procedure given below. “System Type Menu” Change parameter P.01 of the “System Type Menu” to 4. Change parameter P.09 of the “System Type Menu” to 1. - Optional features In addition to the electrical connections of the previous figure (necessary for this system configuration) there are options that do not require settings. fig. 39 Legend (fig. 39) 139 Remote control: it can be installed instead of 72 to manage the request of the 1st zone (direct) 300 Burner on indication (voltage-free contact output): the example shows the connection of a 230 Vac hour meter 301 Fault indication (voltage-free contact output): the example shows the connection of a 230Vac lamp 302 Remote reset input (230Vac): the example shows the connection of a double-pole switch at 230Vac, allowing the resetting of a block type fault 357 Fault indication (230Vac): the example shows the connection of a 230Vac lamp

TOPERA 161EN cod. 3541R966 - Rev. 00 - 01/2024 One direct heating circuit and one DHW circuit with circulating pump - Schematic diagram fig. 40 - Electrical connections After installation, carry out the necessary electrical connections as shown in the wiring diagram. Then configure the controller as described in the specific section. fig. 41 Legend (fig. 40 and fig. 41) 72 1st zone (direct) room thermostat 130 Hot water tank circulating pump 138 External probe 155 Hot water tank probe 300 Anti-Legionella circulating pump 306 1st zone (direct) circulating pump a 1st zone (direct) b Hot water tank circuit M Flow R Return I* ISPESL safety devices (when required - not su- pplied) To manage the sliding temperature it is necessary to purchase the external probe accessory code 013018X0 If a hot water tank probe (not supplied) is used, it is necessary to purchase the NTC probe acces- sory code 1KWMA11W (2 mt.) or code 043005X0 (5 mt.) If a hot water tank thermostat (not supplied) is used, it is necessary to purchase the accessory kit code 013017X0 (to be connected in place of the Hot Water Tank Probe)

306OPERA 162 EN cod. 3541R966 - Rev. 00 - 01/2024 - Parameters Each system requires a different parameterisation. Follow the access procedure given below. “Service Menu” Check/change parameter b02 of the “Transparent Parameters Menu” to 8 (for models 70, 125 and 320) and to 5 (for model 220) Check/change parameter b08 of the “Transparent Parameters Menu” to 1 “System Type Menu” Change parameter P.09 of the “System Type Menu” to 1. - Optional features In addition to the electrical connections of the previous figure (necessary for this system configuration) there are options that do not require settings. fig. 42 Legend (fig. 42) 139 Remote control: it can be installed instead of 72 to manage the request of the 1st zone (direct) 301 Fault indication (voltage-free contact output): the example shows the connection of a 230Vac lamp 302 Remote reset input (230Vac): the example shows the connection of a double-pole switch at 230Vac, allowing the resetting of a block type fault 357 Fault indication (230Vac): the example shows the connection of a 230Vac lamp

LNOPERA 163EN cod. 3541R966 - Rev. 00 - 01/2024 A direct heating circuit and a DHW circuit with diverter valve (3-wire) - Schematic diagram Use diverter valves with 3 wires: OPENING PHASE 230V - CLOSING PHASE 230V - NEUTRAL with switching times (from fully closed to fully open) not exceeding 90 seconds fig. 43 Legend (fig. 43 and fig. 44) 32 Heating circulating pump 72 1st zone (direct) room thermostat 138 External probe 155 Hot water tank probe 348 3-way valve (3-wire)

a 1st zone (direct) b Hot water tank circuit M Flow R Return I* ISPESL safety devices (When required - Not su- pplied) b a

LIANI 348OPERA 164 EN cod. 3541R966 - Rev. 00 - 01/2024 - Electrical connections After installation, carry out the necessary electrical connections as shown in the wiring diagram. Then configure the controller as described in the specific section.

To avoid damaging the board, it is advisable to use external relays to control the 3-way valve, as indicated in fig. 44. To manage the sliding temperature it is necessary to purchase the external probe accessory code 013018X0 If a hot water tank probe (not supplied) is used, it is necessary to purchase the NTC probe accessory code 1KWMA11W (2 mt.) or code 043005X0 (5 mt.) If a hot water tank thermostat (not supplied) is used, it is necessary to purchase the accessory kit code 013017X0 (to be connected in place of the Hot Water Tank Probe) fig. 44 - Parameters Each system requires a different parameterisation. Follow the access procedure given below. “Service Menu” Check/change parameter b02 of the “Transparent Parameters Menu” to 9 (for models 70, 125 and 320) and to 6 (for model 220).

13 14 15OPERA 165EN cod. 3541R966 - Rev. 00 - 01/2024 - Optional features In addition to the electrical connections of the previous figure (necessary for this system configuration) there are options that do not require settings. fig. 45 Legend (fig. 45) 139 Remote control: it can be installed instead of 72 to manage the request of the 1st zone (di- rect) 300 Burner on indication (voltage-free contact output): the example shows the connection of a 230Vac hour meter 301 Fault indication (voltage-free contact output): the example shows the connection of a 230Vac lamp 302 Remote reset input (230Vac): the example shows the connection of a double-pole swit- ch at 230Vac, allowing the resetting of a block type fault 357 Fault indication (230Vac): the example shows the connection of a 230Vac lamp

J2 J1 J3 TOPERA 166 EN cod. 3541R966 - Rev. 00 - 01/2024 Two mixed heating circuits, one direct heating circuit and one DHW circuit with circulating pump - Schematic diagram fig. 46 Legend (fig. 46 and fig. 47) THETA+Central temperature control unit and cascade manager ZM KM-OTModule for cascade management and communication between the generator and the THETA+ unit via Open Therm RS-L Room unit RFF Room probe ZM T2B-GLTInterface with BMS systems BMS Building Management System a Low temperature mixed zone b Low temperature mixed zone c High temperature direct zone d DHW production with double coil storage CS Solar circulating pump S1 Solar field flow sensor (PT 1000) S2 Storage tank temperature probe (supplied as standard with THETA+) INAILINAIL safety devices branch. 56 Expansion vessel 130 DHW storage tank filling pump 138 138 External probe (supplied as standard with THETA+) 155 Storage tank probe (supplied as standard with THETA+) 298 System flow manifold probe (supplied as standard with THETA+) 315 a/bMotorized mixer valve 317 a/bSafety thermostat 318 a/b/cHeating system circulating pump 319 a/bMixed zone flow probe (supplied as standard with THETA+) 319b 318b 317b 315b 318c LIANI M M 319a 318a 317a 315a

OpenThermKM-OTOPERA 167EN cod. 3541R966 - Rev. 00 - 01/2024 - Electrical connections After installation, carry out the necessary electrical connections as shown in the wiring diagram. Then configure the controller as described in the specific section. fig. 47

FUSE 5X20 ZM KM-OTOPERA 168 EN cod. 3541R966 - Rev. 00 - 01/2024 - Parameters To parameterize the "THETA+" thermoregulation, consult the manual supplied with the kit. - Optional features In addition to the electrical connections of the previous figure (necessary for this system configuration) there are options that do not require settings. Legend (fig. 48) 301 Fault indication (voltage-free contact output): the example shows the connection of a 230Vac lamp 302 Remote reset input (230Vac): the example shows the connection of a double-pole switch at 230Vac, allowing the resetting of a block type fault 357 Fault indication (230Vac): the example shows the connection of a 230Vac lamp fig. 48

NLOPERA 169EN cod. 3541R966 - Rev. 00 - 01/2024 Generators in cascade: a direct heating circuit and a DHW circuit with circulating pump Schematic diagram The boiler electronics can manage up to a maximum of 6 modules. 3 are given in the example. fig. 49 Legend (fig. 49 and fig. 50) 72 1st zone (direct) room thermostat 130 Hot water tank circulating pump 138 External probe 155 Hot water tank probe 298 Cascade temperature sensor 300MMASTER boiler motorized butterfly valve

306 1st zone (direct) circulating pump a 1st zone (direct) b Hot water tank circuit M Flow R Return I* ISPESL safety devices (when required - not su- pplied)

• To manage the sliding temperature it is necessary to purchase the external probe accessory code 013018X0

• If a hot water tank probe (not supplied) is used, it is necessary to purchase the NTC probe accessory code 1KWMA11W (2 mt.) or code 043005X0 (5 mt.)

• If a hot water tank thermostat (not supplied) is used, it is necessary to purchase the accessory kit code 013017X0 (to be connected in place of the Hot Water Tank Probe)

SLAVE 1 SLAVE 2OPERA 171EN cod. 3541R966 - Rev. 00 - 01/2024 - Optional features In addition to the electrical connections of the previous figure (necessary for this system configuration) there are options that do not require settings. fig. 51- MASTERfig. 52- SLAVE Legend (fig. 51 and fig. 52) 139 Remote control: it can be installed instead of 72 to manage the request of the 1st zone (direct) 302 Remote reset input (230Vac): the example shows the connection of a double-pole switch at 230Vac, allowing the resetting of a block type fault 357 Fault indication (230Vac): the example shows the connection of a 230Vac lamp MASTER

Before making the connection, make sure the unit is arranged for operation with the type of fuel available and carefully clean all the pipes of the gas system to re- move any residues that could affect proper functioning of the boiler. The gas must be connected to the relevant connection (see fig. 74, fig. 77, fig. 80, fig. 81 and fig. 84) in conformity with the current regulations, using a continuous-surface stainless steel hose, placing a gas cock between the system and the boiler. To allow easy opening of the burner door during periodic maintenance, the last section of the connec-tion between the system and the unit must have a continuous-surface stainless steel hose.fig. 53 Make sure that all gas connections are tight. The capacity of the gas meter must be sufficient for the simultaneous use of all units connected to it. The diameter of the gas pipe leaving the boiler is not decisive for choosing the diameter of the pipe between the unit and the meter; it must be chosen according to its length and pressure losses, in conformity with the current regulations.

Do not use the gas pipes to earth electrical appliances. In case of connection in cascade, make sure to install a fuel shutoff valve externally with respect to the modules.

2.5 Electrical connections

Connection to the electrical grid

The unit's electrical safety is only guaranteed when correctly connected to an effi- cient earthing system executed according to current safety standards. Have the efficiency and suitability of the earthing system checked by professionally qualified personnel. The manufacturer is not responsible for any damage caused by failure to earth the system. Also make sure that the electrical system is adequate for the maximum power absorbed by the unit, as specified on the boiler dataplate. The boiler is prewired and provided with a Y-cable and plug for connection to the electricity line. The connections to the grid must be made with a permanent connection and equipped with a bipolar switch whose contacts have a minimum opening of at least 3 mm, interposing fuses of max. 3A between the boiler and the line. It is important to respect the polarities (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-green wire) in making connections to the electrical line. During installation or when changing the power cable, the earth wire must be left 2 cm longer than the others.

The user must never change the unit's power cable. If the cable gets damaged, switch off the unit and have it changed solely by professionally qualified personnel.OPERA 173EN cod. 3541R966 - Rev. 00 - 01/2024 If changing the electric power cable, use solely “HAR H05 VV-F” 3x0.75 mm2 ca- ble with a maximum outside diameter of 8 mm. Room thermostat (optional)

CAUTION: The room thermostat must have clean contacts. CONNECTING 230 V. TO THE TERMINALS OF THE ROOM THERMOSTAT WILL IRREPARABLY DA- MAGE THE ELECTRONIC CARD. When connecting a remote timer control or a timer switch, do not take the power supply for these devices from their cut-out contacts. Their power supply must be taken with a direct connection from the mains or with batteries, depending on the kind of device. External probe (optional) Connect the probe to its respective terminals. The maximum permissible length of the boiler – external probe connection electric cable is 50 m. A common 2-core cable can be used. The external probe should preferably be installed on the North, North-West wall or on the wall with most of the main living room. The probe must never be exposed to the sun in the early morning, and in general, as far as possible, it must not receive direct solar radiation; if necessary, it must be protected. In any case, the probe must never be mounted near windows, doors, ventilation openings, flues or heat sources that could affect the reading. fig. 54- Positioning of external probe not recommendedOPERA 174 EN cod. 3541R966 - Rev. 00 - 01/2024 Accessing the electrical terminal block The electrical terminal block is located in the back of the boiler. Make the electrical connections as shown in the wiring diagram on fig. 95 and run the cables through the special cable glands.fig. 55- Electrical terminal block

Maximum applicable loads:

• Heating circulating pump: 230Vac 0.8A max, = 0.6

• 3-way valve: 230 Vac, 0.8 A max, = 0.6 for max 1 minute, 0.4 A continuous

• Alarm: 230 Vac, 0.8 A max, = 0.6 For connection in cascade NOTE: The boiler electronics can manage up to a maximum of 6 modules.

1. Connect the modules as shown in fig. 56 (example with 3 modules)

fig. 56- Cascade connectionA 1st ModuleB 2nd ModuleC 3rd Module2. Carry out all the electrical connections (terminals 1 to 30) on module no.1

3. On the remaining modules, connect only the power supply and, if necessary, the contacts relevant to: burner on

(300), fault contact (301) and remote reset input (302). Remove the jumper relevant to: Room Thermostat (72)/Remote Timer Control (139). 4. Switch on the power to the entire cascade5. After the "FH" procedure, check correct operation of the cascade:• Module 1: MASTER icon• Module 2: SLAVE icon• Module 3: SLAVE iconIf this does not occur, disconnect the power and check the wiring in fig. 56. .

ABCOPERA 175EN cod. 3541R966 - Rev. 00 - 01/2024 Settings All adjustments must be made on all the modules, whereas Time Programming must be set only on Module 1. Possible faults If the electrical connection of a module is disconnected for any reason, module 1 will activate fault F70. If the electrical connection of a module is disconnected for any reason, the next module will activate fault F71.

Important The unit is a B23-type with combustion air drawn from the place of installation, and fume exhaust by means of a fan (operation with flue pressurised), and must be connected to one of the discharge systems indicated below. Before pro- ceeding with installation, check and carefully comply with the local regulations and provisions. Also, comply with the provisions on the positioning of wall and/or roof terminals and the minimum distances from windows, walls, ventilation openings, etc.Manifold, ducts and flue must be suitably sized, desig-ned and made in compliance with the current regula-tions. They must be made of suitable materials, i.e.resistant to heat and corrosion, smooth on the insideand tight. In particular, joints must be condensate pro-of. Also, provide for adequate condensate drainagepoints, connected to a trap to prevent the condensateformed in the flues from running into the generators. Connection To calculate the maximum length of the fume ducts,refer to the maximum available head indicated intable 5.

Before making the flue connec- tion fill the condensate trap with approx. 0.5 liters of water through the flue connections. fig. 57- Fume outlet Table 5- Maximum flue pipe length Model“70” Ø 80 Model“125”Ø 100Models“160”“220”Ø 160Models“320”“450”Ø 200Maximum flue head 200 Pa 200 Pa 200 Pa 200 PaOPERA 176 EN cod. 3541R966 - Rev. 00 - 01/2024

2.7 Condensate drain connection

The boiler has a trap to drain condensate. Proceed as follows for assembly.

ATTENTION: The unit must never be operated with the trap empty! fig. 58- Condensate drain connection Neutralizer kit The following condensate neutralizer kits are available on request:code 051000X0 up to 320 kW code 051001X0 up to 320 kW (con pompa di rilancio)code 051002X0 up to 1500 kWcode 051003X0 up to 1500 kW (con pompa di rilancio) Connect these neutralizers directly to the boiler outlet without putting the trap in between. The trap function is carried out by the neutralizer.OPERA 177EN cod. 3541R966 - Rev. 00 - 01/2024

3. Service and maintenance

All adjustment, conversion, commissioning and maintenance operations described below must only be carried out by Qua- lified Personnel (meeting the professional technical requirements of current regulations) such as the personnel of the Local After-Sales Technical Service. FERROLI declines any liability for damage and/or injury caused by unqualified and unauthorized persons tampering with the unit.

Gas conversionThe unit can run on natural gas or LPG and is factory-set for use with one of these two gases, as clearly shown on the packing and on the data plate. Whenever a different gas to that for which the unit is set has to be used, the special conversion kit will be required, proceeding as follows:1. Disconnect the power supply to the boiler.2. Remove the panels.3. Detach the electrical connections from the gas valve controller.

4. Undo the fastening screws “E” and remove the gas valve.

5. Replace the gas nozzle “F”, positioning it inside the gasket “G”. with that contained in the conversion kit. Refit the parts and check tightness.fig. 59- Model OPERA 70fig. 60- Model OPERA 125 and OPERA 160fig. 61- Model OPERA 220fig. 62- Model OPERA 320 and OPERA 450

FOPERA 178 EN cod. 3541R966 - Rev. 00 - 01/20246. Modify the parameter for the type of gas as described below. Reach the screen shown in fig. 63, navigating in the menu and following the path "USER MENU Maintenance Test Mode Gas Type Selection”. Press the contextual buttons 1 and 2 to select the type of gas. Confirm with the OK button.fig. 63 - Gas type selection7. Apply the label, contained in the conversion kit, near the data plate.8. Using a combustion analyzer connected to the boiler fume outlet, make sure the CO content in the fumes, with the boiler operating at max. and min. output, complies with that given in the technical data table for the corresponding type of gas. TEST mode activation Reach the screen shown in fig. 64, navigating the following menu path: "USER MENU Maintenance Test Mode Test mode”. The boiler will light, gradually reaching the maximum heating power (Range Rated) set as described in the next section. The display will show the actual heating power and that set.fig. 64 - Test mode (example heating power = 80%)Press the contextual buttons 1 and 2 to increase the maximum power.To deactivate the TEST mode, press the contextual button 3.The TEST mode is automatically disabled in any case after 15 minutes.

After activating test mode, to exit the TEST make sure to deactivate the function, only by pressing the contex- tual button "Stop Test”.DO NOT TURN OFF THE BOILER ELECTRICALLY DURING THE TEST. If that happens, when the power is switched on again the system does not recognise deactivation of the TEST, and starts working as though still in TEST mode and not as in a normal heating demand. TECNICO Gas Type to confirm NAT LPG Save CH max Installer Test Mode Stop Test

12% 80% RANGE RATED CURRENTOPERA 179EN cod. 3541R966 - Rev. 00 - 01/2024 Heating Capacity Adjustment (RANGE RATED)

This is a “RANGE RATED” boiler (according to EN 483) and can be adjusted to the system's thermal requi- rement by setting the maximum heating capacity for operation in heating mode, as follows:• Put the boiler in TEST mode (see sec. 3.1).

• Press the contextual buttons 1 and 2 to increase or decrease the heating capacity (minimum = 00 - maximum = 100). See the diagram “Heating Capacity Adjustment” (fig. 65).
• By pressing the OK button (detail 6 - fig. 1) the maximum heating capacity will remain that just set. Exit TEST mode (see sec. 3.1). After setting the desired heating capacity, write the value on the sticker provided and place it on the boiler under the data plate. For subsequent checks and adjustments, refer to the set value.

THE HEATING CAPACITY ADJUSTMENT THUS MADE ENSURES THE EFFICIENCY VALUES DECLA-RED AT cap. 4.3 "Technical data table" Heating capacity adjustment diagram A = kW - B = Electronic Board Parameter fig. 65 CASCADE TEST mode activation This function allows all the modules connected in cascade (RANGE RATED) to be activated at the same heating power. From the Master boiler panel (identifiable by the icon ), reach the screen shown in fig. 66, navigating the following menu path: "USER MENU Maintenance Test Mode Test mode”.The modules will light, reaching the maximum heating power (Range Rated) gradually.The display will show the actual heating power (fig. 66 - example with two modules).• 5% = Actual heating power• 1/2 = Modules lit/Modules connectedfig. 66 - Cascade TEST mode (example with two modules)Press the contextual buttons 1 and 2 to increase the maximum power of all modules.To deactivate the CASCADE TEST mode, press the contextual button 3.The CASCADE TEST mode is disabled automatically in any case after 15 minutes.

After activating test mode, to exit the TEST make sure to deactivate the function, only by pressing the contex- tual button "Stop Test”.

Cascade Test Mode Stop Test 2/2 14%OPERA 180 EN cod. 3541R966 - Rev. 00 - 01/2024 DO NOT TURN OFF THE BOILER ELECTRICALLY DURING THE TEST. If that happens, when the power is switched on again the system does not recognise deactivation of the TEST, and starts working as though still in TEST mode and not as in a normal heating demand. TECHNICAL MENU ONLY QUALIFIED PERSONNEL CAN ACCESS THE SERVICE MENU AND MODIFY PARAMETERS. The Technical Menu can only be accessed after entering the code 4 1 8. It is valid for 15 minutes. Configuration - Parameters Menu 16 parameters are available, indicated by the letter “b”, which are not modifiable from Remote Timer Control. Table 6- Parameters - Configuration Notes 1. Parameters with more than one description vary their function and/or range in relation to the setting of the parameter given in brackets.

2. Parameters with more than one description are reset to the default value if the parameter given in brackets is mo-

dified. Parameter Description Range

b01 Gas type selection Natural Gas/LPG Natural gas Natural gas Natural gas Natural gas Natural gas Natural gas b02 Boiler type selection 1 ÷ 6 = Not used 7 = Heating only 8 = Combi with storage tank with double pump 9 = Combi with storage tank with diverter valve

b03 System water pressure protection selection 0 = Pressure switch 1 = Flow switch 1 sec 2 = Flow switch 3 sec 3 = Flow switch 5 sec 4 = Flow switch 10 sec 5 = Pressure transducer

= No F43, 1-15 = 1-15°C/second

P30 Heating hysteresis after ignition 6-30°C 10 10 10 10 10 10 P31 Timer for heating hysteresis after ignition 0-180 seconds 60 60 60 60 60 60OPERA 182 EN cod. 3541R966 - Rev. 00 - 01/2024 System Type - Parameters Menu 23 parameters are available, indicated by the letter “P.” which are not modifiable from Remote Timer Control. Notes

1. * These parameters are active only when several systems are connected in cascade.

2. ** These parameters are active only when the system operates with input 0-10Vdc.

P. 0 1 Heating request selection

= Normal heating request

= Request from remote control with external on-off ena- bling

= 0-10V signal request with temperature control with external on-off enabling

= 0-10V signal request with external on-off enabling

= Control of 2 climatic curves with remote control-room thermostat and second room thermostat

= Control of 2 climatic curves with remote control-room thermostat and second room thermostat

P. 0 2 Cascade sensor selection

= Enabled OFF OFF OFF OFF OFF OFF P. 11 3-way valve selection 2/3 = 2 or 3 wires

= Enabled OFF OFF OFF OFF OFF OFF P. 2 3 Continuous comfort Slave boiler (AX5200SQ) OFF = Disabled,

= Enabled OFF OFF OFF OFF OFF OFFOPERA 183EN cod. 3541R966 - Rev. 00 - 01/2024

Checks to be done at first lighting, and after all maintenance operations that invol- ved disconnection from the systems or work on safety devices or parts of the boiler: Before lighting the boiler

• Open any on-off valves between the boiler and the systems.
• Check the tightness of the gas system, proceeding with caution and using a soap and water solution to detect any leaks in connections.• Check correct prefilling of the expansion tank (ref. sec. 4.3).
• Fill the water system and make sure all air contained in the boiler and the system has been vented, by opening the air vent valve on the boiler and any vent valves on the system. • Fill the condensate trap and check correct connection of the condensate elimination system.• Make sure there are no water leaks in the system, DHW circuits, connections or boiler.
• Check correct connection of the electrical system and efficiency of the earthing system
• Make sure the gas pressure value for heating is that required.• Make sure there are no flammable liquids or materials in the immediate vicinity of the boiler

IF THE ABOVE INSTRUCTIONS ARE NOT OBSERVED THERE MAY BE RISK OF SUFFOCATION OR POISONING DUE TO GAS OR FUMES ESCAPING; DANGER OF FIRE OR EXPLOSION. ALSO, THERE MAY BE A RISK OF ELEC- TRIC SHOCK OR FLOODING THE ROOM. Checks during operation

• Turn the unit on as described in sec. 1.3.• Make sure the fuel circuit and water systems are tight.• Check the efficiency of the flue and air-fume ducts while the boiler is working.• Check the correct tightness and functionality of the condensate elimination system and trap.
• Make sure the water is circulating properly between the boiler and the systems.
• Make sure the gas valve modulates correctly in the heating and domestic hot water production phases.
• Check proper boiler lighting by doing several tests, turning it on and off with the room thermostat or remote control.
• Using a combustion analyser connected to the boiler fume outlet, check that the CO content in the fumes, with the boiler operating at max. and min. output, corresponds to that given in the technical data table for the corresponding type of gas.
• Make sure the fuel consumption indicated on the meter matches that given in the technical data table on sec. 4.3.

• Check the correct programming of the parameters and carry out any necessary customization (compensation curve, power, temperatures, etc.).OPERA 184 EN cod. 3541R966 - Rev. 00 - 01/2024

Periodical inspection To ensure proper operation of the unit, it is necessary to have an annual inspection carried out by qualified personnel, providing for the following:• heat exchanger check and cleaning with suitable products if dirty or clogged• check and possible cleaning of burner (do not use chemical products or wire brushes)

IMPORTANT: after cleaning the burner, be sure to position it by aligning the flange joint weld with the cen- ter of the peephole hole (see fig. 67).fig. 67 - Alignment of the burner• check and cleaning of electrodes, which must be free of deposits and properly positioned• seal and gasket check (burner, sealed chamber, etc.)• check and cleaning of sludge remover filters and system filters• check, cleaning and filling of condensate drain traps• check of wiring, contacts, electrical actuators• check and cleaning of generator air inlets and boiler room air intakes• check and cleaning of fume evacuation duct-manifold-flue system.• expansion tank check and prefilling

• check of correct and stable system water pressure, ensuring conformity with the required working pressure.

The use of automatic filling systems for reinstatement of operating conditions must provide for adequate treatment of the water (ref. *** 'System water charac- teristics' on page 155 ***)

• check of heating system water chemical and physical parameters (ref. *** 'System water characteristics' on page 155 ***)• water and gas system tightness check
• check of correct and stable gas supply pressure to plant (20 mbar for operation with natural gas); any fluctuations or pressure drops below the declared value can create malfunctioning and stops with need for manual resetting.

• burner ignition and control and safety device check (gas valve, flowmeter, thermostats, etc.)
• circulating pump check, freeing when necessary• fume analysis and check of combustion parameters

The casing, control panel and aesthetic parts of the boiler can be cleaned with a soft damp cloth, possibly soaked in soapy water. All abrasive detergents and solvents should be avoided.OPERA 185EN cod. 3541R966 - Rev. 00 - 01/2024 Burner door opening To access the burner observe the following instructions.

• Open the burner door and block it with the support brackets (fig. 71). ONE for models OPERA 70 and 125. TWO for models OPERA 160, 220, 320 and 450. fig. 71OPERA 187EN cod. 3541R966 - Rev. 00 - 01/2024To close it, repeat these operations in reverse order.

Carefully tighten the nuts (fig. 72). 6 for models OPERA 70 and 125. 8 for models OPERA 160, 220, 320 and 450. When finished check the perfect tightness of the gas circuit. fig. 72

Diagnostics The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault, the display lights up indicating the fault code and, in case of cascade connection, the module number.

• There are faults that cause permanent shutdowns which can be reset by pressing the OK button for one second or with the RESET button on the remote timer control (optional) if installed. If the boiler fails to restart after resetting, it is necessary to eliminate the fault first.
• Other faults cause temporary shutdowns which are automatically reset as soon as the value returns within the boiler's normal working range. Table of faults Table 8- List of faults Fault code Fault Possible cause Cure01 No burner ignitionNo gasCheck the regular gas flow to the boiler and that the air has been eliminated from the pipesIgnition/detection electrode faultCheck the wiring of the electrode and that it is correctly positioned and free of any depositsFaulty gas valveCheck the gas valve and replace it if neces- sary Insufficient gas supply pressure Check the gas supply pressureTrap blocked Check the trap and clean it if necessary Flame present signal with burner offElectrode fault Check the ionization electrode wiringCard fault Check the cardOPERA 188 EN cod. 3541R966 - Rev. 00 - 01/2024

Overtemperature pro- tection intervention No water circulation in the system Check the circulating pump Air in the system Vent the system

Fume extraction duct safety device inter- vention Fault 07 generated 3 times in the last 24 hours See fault 07

Fan protection inter- vention Fault 15 generated for 1 hour consecutive See fault 15

No flame after ignition phase (6 times in 4 minutes) Ionization electrode fault Check the position of the ionization electrode and replace it if necessary Flame unstable Check the burner Gas valve Offset fault Check the Offset adjustment at minimum power air/fume ducts obstructed Remove the obstruction from the flue, fume extraction ducts, air inlet and terminals Trap blocked Check the trap and clean it if necessary

High fume tempera- ture Exchanger dirty Clean the exchanger Exchanger deteriorated Check the integrity of exchanger Sensor does not indicate the correct temperature Check the fume sensor or replace it

Heating sensor 1 (flow) overtempera- ture indication (Viewable only in History Menu) insufficient system water circulation check water circulation

Heating sensor 1 (flow) fault Sensor damaged Check the wiring or replace the sensorWiring shorted Wiring disconnected 11 Return sensor fault Sensor damaged Check the wiring or replace the sensorWiring shorted Wiring disconnected 12 DHW sensor fault Sensor damaged Check the wiring or replace the sensorWiring shorted Wiring disconnected 13 Fume sensor fault Sensor damaged Check the wiring or replace the sensorWiring shorted Wiring disconnected

Heating sensor 2 (Safety) fault Sensor damaged Check the wiring or replace the sensorWiring shorted Wiring disconnected 15 Fan fault No 230V power supply Check the 3-pin connector wiring Tachometric signal interrupted Check the 5-pin connector wiring Fan damaged Check the fan

RESET button on controller on gas valve, fault. RESET button on controller fitted on gas valve blocked or faulty. Check the RESET button and replace the con- troller on the gas valve if necessary.

Faulty mains fre- quency Electric mains trouble Check the electrical system

Pressure switch con- tact open Low system pressure Check the system water pressure 39 External probe fault Probe damaged or wiring shorted Check the wiring or replace the sensor Probe disconnected after activating the sliding temperature Reconnect the external probe or disable the sliding temperature

No +/-1°C variation of flow sensor Flow sensor disconnected from pipe Check the correct positioning and operation of flow sensor

Protection for tempe- rature difference > 21° between flow sensor and safety sensor Insufficient circulation in boiler Check boiler/system water circulation Incorrect flow sensor position Check the integrity of sensor

Protection for tempe- rature difference > 18° between flow sensor and safety sensor Insufficient circulation in boiler Check boiler/system water circulation Check the integrity of flow and safety sensor 61 Controller fault Controller internal error Check the ground connection and replace the controller if necessary.

No communication between controller and gas valve Controller not connected Connect the controller to the gas valve Valve damaged Replace the valve

No communication between controller and display Wiring disconnected Check the wiring of the 6 wires between con- troller and display Fault code Fault Possible cause CureOPERA 190 EN cod. 3541R966 - Rev. 00 - 01/2024

4. Technical data and characteristics

Legend of figures cap. 4 "Technical data and characteristics" 7 Gas inlet 10 System flow 16 Fan 32 Heating circulating pump (not supplied) 36 Automatic air vent 44 Gas valve 72 Room thermostat (not supplied) 72b Second room thermostat (not supplied) 81 Ignition electrode 82 Detection electrode 95 3-way valve - 2 wires (not supplied) A = Heating phase B = Neutral 98 Switch 114 Water pressure switch 130 DHW circulating pump (not supplied) 138 External probe (not supplied) 139 Remote timer control (not supplied) 154 Condensate drain pipe 155 Hot water tank temperature probe (not supplied) 186 Return sensor 188 Ignition/Ionization electrode 191 Fume temperature sensor 220 Ignition card 256 Modulating heating circulating pump signal 275 Heating system drain cock 278 Double sensor (Safety + Heating) 298 Cascade temperature sensor (not supplied) 299 Input 0-10 Vdc 300 Burner lit contact (voltage-free contact) 301 Fault contact (voltage-free contact) 302 Remote reset input (230 Volt) 306 Heating system circulating pump (not supplied) 307 Heating system second circulating pump (not supplied) 321 Low temperature return 346 High temperature return 348 3-way valve - 3 wires (not supplied) A = Heating phase B = Neutral C = DHW phase 357 Faulty contact (230 Vac) 361 Cascade connection of next module 362 Cascade connection of previous module 363 MODBUS communicationOPERA 191ENcod. 3541R966 - Rev. 00 - 01/2024

4.1 Dimensions, connections and main components

Views for the model 70fig. 73- Frontfig. 74- Rearfig. 75- Top

Ø200OPERA 195EN cod. 3541R966 - Rev. 00 - 01/2024 Views for the model 450 fig. 86- Front view model 450fig. 87- Rear view model 450fig. 88- Top view model 450

The column on the right gives the abbreviation used on the data plate. These boilers can work correctly with a minimum flow rate of 0 liters/h.

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ATTENTION: Remove the jumper on the terminal block before connecting the room thermostat or remote timer control. ATTENTION: To connect the 3-way valve (terminals 13 - 14 - 15), refer to the diagrams of fig. 92 and fig. 93. fig. 92- Connection of the 3-way valve with 2 wiresfig. 93- Connection of the 3-way valve with 3 wires ATTENTION: In case of instability in the reading of the 0-10V signal by the electronic controller, it is advisable to connect the signal reference to ground, and insert a 10K resistor in parallel, as per fig. 94. fig. 94-

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