DIVAtech D LN C24 - Central heating boiler FERROLI - Free user manual and instructions

USER MANUAL DIVAtech D LN C24 FERROLI

cod. 3541P710 — Rev. 00 - 10/2018 DIVAtech D ,.#24/#32

cod. 3541P — Rev. 00 - /20

cod. 3541P711 - Rev. 00 - 12/2020

cod. 3541P711 - Rev. 00 - 12/2020

cod. 3541P711 - Rev. 00 - 12/2020

cod. 3541P711 - Rev. 00 - 12/2020 1. GENERAL WARNINGS• Carefully read and follow the instructions contained in this instruction booklet.• After boiler installation, inform the user regarding its operation and give him thismanual, which is an integral and essential part of the product and must be kept withcare for future reference.• Installation and maintenance must be carried out by professionally qualified person-nel, in compliance with the current regulations and according to the manufacturer'sinstructions. Do not carry out any operation on the sealed control parts.• Incorrect installation or inadequate maintenance can result in damage or injury. TheManufacturer declines any liability for damage due to errors in installation and use,or failure to follow the instructions.• Before carrying out any cleaning or maintenance operation, disconnect the unit fromthe electrical power supply using the switch and/or the special cut-off devices.• In case of a fault and/or poor operation, deactivate the unit and do not try to repairit or directly intervene. Contact professionally qualified personnel. Any repair/re-placement of the products must only be carried out by qualified personnel using orig-inal replacement parts. Failure to comply with the above could affect the safety ofthe unit.• This unit must only be used for its intended purpose. Any other use is deemed im-proper and therefore hazardous.• The packing materials are potentially hazardous and must not be left within thereach of children.• The unit must not be used by people (including children) with limited physical, sen-sory or mental abilities or without experience and knowledge of it, unless instructedor supervised in its use by someone responsible for their safety.• The unit and its accessories must be appropriately disposed of, in compliance withthe current regulations.• The images given in this manual are a simplified representation of the product. Inthis representation there may be slight and insignificant differences with respect tothe product supplied.2. OPERATING INSTRUCTIONS2.1 IntroductionDear Customer,DIVAtech D LN C is a high-efficiency for heating and hot water production running onnatural gas or LPG, and equipped with a microprocessor control system.2.2 Control panelPanelfig. 1 - Control panelKey of panel fig. 11 DHW temperature setting decrease button2 DHW temperature setting increase button3 Heating system temperature setting decrease button4 Heating system temperature setting increase button5 Display6 "Sliding Temperature" Menu - Summer/Winter mode selection - Reset button7 Unit On/Off - Economy/Comfort mode selection button8 DHW symbol9 DHW mode10 Summer mode11 Multifunction12 Eco (Economy) mode13 Heating14 Heating symbol 15 Burner lit and actual power level (flashing during combustion fault function) 16 Service Tool connection17 Water gaugeIndication during operationHeatingA heating demand (generated by the Room Thermostat or Remote Timer Control) is in-dicated by flashing of the hot air above the radiator on the display. The display (detail 11 - fig. 1) shows the actual heating delivery temperature and, during heating standby time, the message “d2”.Domestic hot water (DHW)A DHW demand (generated by drawing domestic hot water) is indicated by flashing ofthe hot water under the tap on the display.The display (detail 11 - fig. 1) shows the actual DHW outlet temperature and, duringDHW standby time, the message “d1“.ComfortA Comfort demand (reinstatement of temperature inside the boiler) is indicated by flash-ing of the water under the tap on the display. The display (detail 11 - fig. 1) shows theactual temperature of the water in the boiler.FaultIn case of a fault (see cap. 4.4) the display shows the fault code (detail 11 - fig. 1) and during safety pause times the messages “d3”, “d4” and “d5”. 2.3 Lighting and shutdownConnection to the power supply• During the first 5 seconds the display will also show the card software release.• Open the gas cock ahead of the boiler.• The boiler is now ready to function automatically whenever domestic hot water isdrawn or in case of a heating demand (generated by Room Thermostat or RemoteTemperature Control).Turning the boiler off and on Press the on/off button (detail 7 - fig. 1) for 5 seconds. fig. 2 - Turning the boiler offWhen the boiler is turned off, the circuit board is still powered. Domestic hot water andheating are disabled. The frost protection system remains activated. To relight the boiler, press the on/off button (detail 7 fig. 1) again for 5 seconds. fig. 3The boiler will be immediately ready to work whenever domestic hot water is drawn or incase of a heating demand (generated by the Room Thermostat or the Remote Timercontrol).

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 shutdownsin winter, it is advisable to drain all water from the boiler, the DHW circuit andthe heating system water; or drain just the DHW circuit and add a suitable an-tifreeze to the heating system, as prescribed in sec. 3.3.2.4 AdjustmentsSummer/Winter Switchover Press the summer/winter button (detail 6 - fig. 1) for 2 seconds. The display activates the Summer symbol (detail 10 - fig. 1): the boiler will only deliverdomestic hot water. The antifreeze system remains activated. To deactivate the Summer mode, press the summer/winter button (detail 6 - fig. 1) again for 2 seconds.Heating temperature adjustmentUse the heating buttons (details 3 and 4 - fig. 1) to adjust the temperature from a min. of30°C to a max. of 80°C; in any case, it is advisable not to operate the boiler below 45°C.fig. 4THE CE MARKING CERTIFIES THAT THE PRODUCTS MEET THE ESSENTIAL REQUIREMENTS OF THE RELEVANT DIRECTIVES IN FORCE.THE DECLARATION OF CONFORMITY MAY BE REQUESTED FROM THE MANUFACTURER.

cod. 3541P711 - Rev. 00 - 12/2020DHW temperature adjustmentUse the DHW buttons (details 1 and 2 - fig. 1) to adjust the temperature from a min. of40°C to a max. of 55°C.fig. 5Room temperature adjustment (with optional room thermostat)Using the room thermostat, set the temperature required in the rooms. If the room ther- mostat is not installed, the boiler will keep the system at the set system delivery setpoint temperature.Room temperature adjustment (with optional remote timer control)Using the remote timer control, set the required temperature in the rooms. The boiler willadjust the system water according to the required room temperature. For operation withremote timer control, please refer to the relevant instruction manual.ECO/COMFORT selectionThe unit has a function that ensures a high domestic hot water delivery speed and max-imum comfort for the user. When the device is activated (COMFORT mode), the watercontained in the boiler is kept hot, thereby ensuring immediate availability of hot wateron opening the tap, without waiting times. The user can deactivate the device (ECO mode) by pressing the eco/comfort button (detail 7 - fig. 1). In ECO mode the display activates the ECO symbol (detail 12 - fig. 1). To activate the COMFORT mode, press the eco/comfort button (detail 7 - fig. 1) again. Sliding TemperatureWhen the optional external probe is installed the boiler adjustment system works with"Sliding Temperature". In this mode, the heating system temperature is regulated ac-cording to weather conditions, to ensure the high comfort and energy efficiency through-out the year. In particular, as the outside temperature increases the system deliverytemperature decreases according to a specific "compensation curve".With the Sliding Temperature adjustment, the temperature set with the heating buttons(detail 3 - fig. 1) becomes the maximum system delivery temperature. It is advisable toset 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. However,the user can make any further adjustments necessary to optimise comfort levels.Compensation curve and curve offset Press the reset button (detail 6 - fig. 1) for 5 seconds to access the “Sliding temperature” menu; the display shows “CU” flashing.Use the DHW buttons (detail 1 - fig. 1) to adjust the desired curve from 1 to 10 accordingto the characteristic (fig. 6). By setting the curve to 0, the sliding temperature adjustmentis disabled.Press the heating buttons (detail 3 - fig. 1) to access parallel curve offset; the display shows “OF” flashing. Use the DHW buttons (detail 1 - fig. 1) to adjust parallel curve offset according to the characteristic (fig. 7). Press the reset button (detail 6 - fig. 1) again for 5 seconds to exit the "Sliding Temper- ature" menu.If the room temperature is lower than the required value, it is advisable to set a higherorder curve and vice versa. Proceed by increasing or decreasing in steps of one andcheck the result in the room.fig. 6 - Compensation curvesfig. 7 - Example of compensation parallel curve offsetAdjustments from Remote Timer Control If the Remote Timer Control (optional) is connected to the boiler, the above ad-justments are managed according to that given in table 1.Table. 1System water pressure adjustmentThe filling pressure read on the boiler water gauge (detail 2 - fig. 8) with system cold mustbe approx 1.0 bar. If the system pressure falls below minimum values, the boiler stops and fault F37 is displayed. Pull out the filling knob (detail 1 - fig. 8) and turn it anticlock- wise to return it to the initial value. Always close it afterwards.Once the system pressure is restored, the boiler will activate the 300-second air ventingcycle indicated on the display by Fh.To prevent boiler shutdown, it is advisable to periodically check the pressure on thegauge with system cold. In case of a pressure below 0.8 bar, it is advisable to restore it.fig. 8- Filling knobSystem drainingThe drain faucet ring nut is located under the safety valve inside the boiler.To drain the system, turn the ring (ref. 1 - fig. 9) counter-clockwise to open the faucet. Donot use any tools; use hands only.To drain only the water in the boiler, first close the shut-off valves between the systemand boiler before turning the ring.fig. 9- Safety valve with drain faucet

OFFSET = 20 OFFSET = 40 Heating temperature setting Adjustment can be made from the Remote Timer Control menu and the boiler control panel. DHW temperature adjustment Adjustment can be made from the Remote Timer Control menu and the boiler control panel. Summer/Winter Switchover Summer mode has priority over a possible Remote Timer Control heating demand. Eco/Comfort selection On disabling DHW from the Remote Timer Control menu, the boiler selects the Economy mode. In this condition, the eco/com- fort button (detail 7 - fig. 1) on the boiler panel is disabled. On enabling DHW from the Remote Timer Control menu, the boiler selects the Comfort mode. In this condition it is possible select one of the two modes with the eco/comfort button (detail 7 - fig. 1) on the boiler panel. Sliding Temperature Both the Remote Timer Control and the boiler card manage Slid- ing Temperature adjustment: the boiler card Sliding Temperature has priority.

cod. 3541P711 - Rev. 00 - 12/20203. INSTALLATION3.1 General InstructionsBOILER INSTALLATION MUST ONLY BE PERFORMED BY QUALIFIED PERSON- NEL, IN ACCORDANCE WITH ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE PROVISIONS OF CURRENT LAW, THE PRESCRIPTIONS OF NA-TIONAL AND LOCAL STANDARDS AND THE RULES OF PROPER WORKMANSHIP.3.2 Place of installation This unit is an "open chamber" type and can only be installed and oper-ated in permanently ventilated rooms. An insufficient flow of combustionair to the boiler will affect its normal operation and fume evacuation. Al-so, the fumes forming under these conditions are extremely harmful tohealth if dispersed in the domestic environment.The unit is designed to operate in a partially protected place, with a minimum tempera- ture of -5°C. If provided with the special antifreeze kit, it can be used with a minimum tem- perature down to -15°C. The boiler must be installed in a sheltered place, for instanceunder the slope of a roof, inside a balcony or in a protected recess.The place of installation must be free of flammable materials, objects and dusts or cor-rosive gases.The boiler is arranged for wall mounting and comes as standard with a hooking bracket.Wall fixing must ensure stable and effective support for the generator. If the unit is enclosed in a cabinet or mounted alongside, there must be suffi-cient space for removing the casing and for normal maintenance activities3.3 Plumbing connectionsImportant The safety valve outlet must be connected to a funnel or collection pipe to pre-vent 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 manu-facturer cannot be held liable. Before making the connection, check that the unit is arranged for operation withthe type of fuel available and carefully clean all the system pipes. Carry out the relevant connections according to the diagram in fig. 2.3 and the symbols on the unit.Note: The unit is equipped with an internal bypass in the heating circuit.Water system characteristicsIn the presence of water harder than 25° Fr (1°F = 10ppm CaCO ), use suitably treatedwater in order to avoid possible scaling in the boiler.Antifreeze system, antifreeze fluids, additives and inhibitorsWhen necessary, antifreeze fluids, additives and inhibitors can be used only if the man-ufacturer of such fluids or additives guarantees that they are suitable and do not causedamage to the exchanger or other components and/or materials of the boiler and system. Do not use generic antifreeze fluids, additives or inhibitors that are not specific for use in heating systems and compatible with the materials of the boiler and system.3.4 Gas connectionThe gas must be connected to the relevant connection (see fig. 2.3) in conformity withthe current standards, using a rigid metal pipe or a continuous surface flexible s/steeltube and installing a gas cock between the system and boiler. Make sure all the gas con-nections are tight.3.5 Electrical connectionsIMPORTANT BEFORE CARRYING OUT ANY OPERATION THAT REQUIRES REMOVINGTHE CASING, DISCONNECT THE BOILER FROM THE ELECTRIC MAINSWITH THE MAIN SWITCH.NEVER TOUCH THE ELECTRICAL COMPONENTS OR CONTACTS WITHTHE MAIN SWITCH TURNED ON! DANGER OF ELECTRIC SHOCK WITHRISK OF INJURY OR DEATH! The unit must be connected to an efficient grounding system in accordance withapplicable safety regulations. Have the efficiency and suitability of the ground-ing system checked by professionally qualified personnel; the Manufacturer de-clines any liability for damage caused by failure to earth the system.The boiler is prewired and provided with a three-pole cable, without a plug, forconnection to the electric line. The connections to the grid must be made witha permanent connection and equipped with a bipolar switch whose contactshave a minimum opening of at least 3 mm, interposing fuses of max. 3A be-tween the boiler and the line. Make sure to respect the polarities (LINE: brownwire / NEUTRAL: blue wire / GROUND: yellow-green wire) in the connectionsto the electric line.

The unit's supply cable MUST NOT BE REPLACED BY THE USER. If the ca- ble gets damaged, turn the unit off and have the cable replaced only byprofessionally qualified personnel. In case of replacement, only use cable“HAR H05 VV-F” 3x0.75 mm2 with max. external diameter of 8 mm.Room thermostat (optional) IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREECONTACTS. CONNECTING 230 V TO THE ROOM THERMOSTAT TERMI-NALS WILL PERMANENTLY DAMAGE THE ELECTRONIC BOARD.When connecting time controls or a timer, do not take the power supply forthese devices from their breaking contacts Their power supply must be bymeans of direct connection from the mains or with batteries, depending on thekind of device.Accessing the electrical terminal blockThe electrical terminal block can be accessed after removing the casing. The layout of the terminals for the various connections is also given in the wiring diagram in fig. 23. fig. 10 - Accessing the terminal block3.6 Air/fume ductsThe diameter of the flue connection pipe must not be less than that of the connection onthe anti-backflow device. Starting from the anti-backflow device it must have a verticalsection at least 50 cm long. Current standards must be complied with regarding sizingand installation of the flues and connection pipe. The boiler is also equipped with a safety device (fume thermostat) that stopsoperation of unit in case of inadequate draught of obstruction of the flue. Thisdevice must never be tampered with or deactivated.4. SERVICE AND MAINTENANCEImportant All adjustment, conversion, commissioning and maintenance operationsdescribed below must only be carried out by Qualified Personnel (meet-ing the professional technical requirements of current regulations) suchas the personnel of the Local After-Sales Technical Service.FERROLI declines any liability for damage and/or injury caused by un-qualified and unauthorized persons tampering with the unit.

cod. 3541P711 - Rev. 00 - 12/2020

MUST BE REPLACED. The unit can operate 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 gas dif- ferent from that for which the unit is arranged has to be used, the special conversion kit will be required, proceeding as follows:

1. Disconnect the boiler power supply and close the gas cock.

2. Replace the nozzles at the main burner, fitting the nozzles specified in the technical

data table in cap. 5, according to the type of gas used

3. Switch the boiler power on and open the gas cock.

4. Modify the parameter for the type of gas:

• put the boiler in standby mode

• the boiler will return to standby mode

5. Adjust the minimum and maximum pressures at the burner (ref. relevant para-

graph), setting the values given in the technical data table for the type of gas used

6. Apply the sticker contained in the conversion kit, near the data plate as proof of the

conversion. Activation of Auto-setting function for gas valve calibration THIS PROCEDURE MUST ONLY BE CARRIED OUT IN THE FOLLOWING CASES: GAS VALVE REPLACEMENT, CARD REPLACEMENT, CONVERSION FOR GAS CHANGE. The B&P Gas Valve (with integrated modulating operator) does not provide for mechan- ical calibration: the minimum and maximum power adjustments are therefore electroni- cally done via two parameters: Gas valve pre-calibration

1. Connect a pressure gauge to monitor the gas valve outlet pressure.

2. Enable the Auto-setting function (Parameter b12=1).

3. Activate the calibration procedure by pressing the heating + button and Eco/Comfort

button together for 5 seconds. The message "Au-to" immediately appears (in two successive flashes) and the burner is lit. Within 8 seconds (natural gas and LPG) the boiler finds the ignition point. The ignition point, absolute minimum current Offset (Parameter q01) and absolute maximum current Offset (Parameter q02) values are stored by the card. Gas valve calibration

1. The display will show "q02" flashing; the modulation current is forced to the pre-cal-

pressure minus 1mbar is reached on the pressure gauge. Wait 10 seconds for the pressure to stabilise.

3. Press the DHW “+” button to set the parameter “q02” until the maximum nominal

pressure is reached on the pressure gauge. Wait 10 seconds for the pressure to sta- bilise.

4. If the pressure read on the pressure gauge is different from the maximum nominal pres-

button: after each change, wait 10 seconds for the pressure to stabilise.

5. When the pressure read on the pressure gauge is equal to the maximum nominal

pressure plus 0.5mbar is reached on the pressure gauge. Wait 10 seconds for the pressure to stabilise.

DHW “-” button to adjust the parameter "q01" until the minimum nominal pres- sure is reached on the pressure gauge. Wait 10 seconds for the pressure to stabilise.

8. If the pressure read on the pressure gauge is different from the minimum nominal

pressure, proceed in decrements of 1 or 2 units of the parameter “q01” by pressing the DHW “-” button: after each change, wait 10 seconds for the pressure to stabilise.

9. When the pressure read on the pressure gauge is equal to the minimum nominal

pressure (the newly calibrated value of the parameter "q01" is automatically saved.), recheck both adjustments by pressing the heating buttons and correct them if nec- essary by repeating the procedure described above.

10. The calibration procedure ends automatically after 15 minutes or by pressing the

heating “+” and Eco/Comfort buttons together for 5 seconds. Checking of gas pressure values and adjustment with limited range

• Check that the supply pressure complies with that indicated in the technical data table.

• Connect a suitable pressure gauge to the pressure sampling point “B” located downstream from the gas valve.

• Activate the TEST mode and follow the instructions for checking the gas pressures at maximum power and minimum power (see next par.). If the maximum and/or minimum nominal pressures read on the pressure gauge are dif- ferent from those indicated in the technical data table, proceed with the next sequence.

• Press the Eco/Comfort button for 2 seconds to go to the gas valve Calibration with limited range mode.

• The card goes to the setting “q02”; displaying the currently saved value by pressing the DHW buttons.

• If the maximum pressure read on the pressure gauge is different from the nominal one, proceed in increments/decrements of 1 or 2 units of the parameter “q02” by pressing the DHW buttons: after each change, the value is stored; wait 10 seconds for the pressure to stabilise.

• Press the heating “-” button (ref. 3 - fig. 1).

• The card goes to the setting “q01”; displaying the currently saved value by pressing the DHW buttons.

• If the minimum pressure read on the pressure gauge is different from the nominal one, proceed in increments/decrements of 1 or 2 units of the parameter “q01” by pressing the DHW buttons: after each change, the value is stored; wait 10 seconds for the pressure to stabilise.

• Recheck both settings by pressing the heating buttons and if necessary correct them by repeating the procedure described above.

• Disconnect the pressure gauge. TEST mode activation Press the heating buttons (details 3 and 4 - fig. 1 ) together for 5 seconds to activate the TEST mode. The boiler lights at the maximum heating power set as described in the following section. The heating and DHW symbols (fig. 13) flash on the display; the heating power will ap- pear alongside. fig. 13 - TEST mode (heating power = 100%) Press the heating buttons (details 3 and 4 - fig. 1) to increase or decrease the power (Min.=0%, Max.=100%). By pressing the DHW “-” button (detail 1 - fig. 1), boiler output is immediately adjusted to min. (0%). By pressing the DHW “+” button (detail 2 - fig. 1), boiler output is immedi- ately adjusted to max. (100%). If the TEST mode is activated and enough hot water is drawn to activate the DHW mode, the boiler remains in TEST mode but the 3-way valve goes to DHW. To deactivate the TEST mode, press the heating buttons (details 3 and 4 - fig. 1) together for 5 seconds. The TEST mode is automatically deactivated in any case after 15 minutes or on stopping of hot water drawing (if enough hot water has been drawn to activate the DHW mode). Heating power adjustment To adjust the heating power, switch the boiler to TEST mode (see sec. 4.1). Press the heating buttons detail 3 - fig. 1 to increase or decrease the power (min. = 00 - max. = 100). Press the reset button within 5 seconds and the max. power will remain that just set. Exit TEST mode (see sec. 4.1). Contents Description Natural Gas Propane Gas q01 Absolute minimum current offset 0÷100 0÷150 q02 Absolute maximum current offset 0÷100 0-150 fig. 11 - Gas valve

cod. 3541P711 - Rev. 00 - 12/2020 Configuration Menu The configuration Menu is accessed by pressing the DHW buttons together for 10 sec- onds. 12 parameters, indicated by the letter "b” and not modifiable from Remote Timer Control, are available. Press the Heating buttons to scroll the list of parameters in increasing or decreasing or- der. Press the DHW buttons to view or modify the value of a parameter: the change will be automatically saved. Notes:

1. Parameters with more than one description vary their function and/or range in rela-

tion to the setting of the parameter given in brackets.

2. Parameters with more than one description are reset to the default value if the pa-

rameter given in brackets is modified. To exit the configuration Menu press the DHW buttons together for 10 seconds, or exiting occurs automatically after 2 minutes. Service menu The card Service Menu is accessed by pressing the Reset button for 20 seconds. 4 sub- menus are available: press the Heating buttons to select, in increasing or decreasing or- der, "tS", "In", "Hi" or "rE". "tS" means Transparent Parameters Menu, "In" means Information Menu, "Hi" means History Menu: after selecting the submenu, press the Re- set button again to access it; "rE" means History Menu Reset: see description. “tS” - Transparent Parameters Menu 21 parameters indicated by the letter "P” are available, which are also modifiable from Remote Timer Control. Press the Heating buttons to scroll the list of parameters in increasing or decreasing or- der. Press the DHW buttons to view or modify the value of a parameter: the change will be automatically saved. Notes:

1. Parameters with more than one description vary their function and/or range in rela-

tion to the setting of the parameter given in brackets.

2. Parameters with more than one description are reset to the default value if the pa-

rameter given in brackets is modified.

3. The Maximum Heating Power parameter can also be modified in Test Mode.

Press the Reset button to return to the Service Menu. Press the Reset button for 20 sec- onds to exit the card Service Menu, or exiting occurs automatically after 15 minutes. “In” - Information Menu 9 pieces of information are available. Press the Heating buttons to scroll the list of information in increasing or decreasing or- der. Press the DHW buttons to display the value. Notes:

1. In case of damaged sensor, the card displays hyphens.

Press the Reset button to return to the Service Menu. Press the Reset button for 20 sec- onds to exit the card Service Menu or exiting occurs automatically after 15 minutes. "Hi" - History Menu The card can store the last 11 faults: the History datum item H1: represents the most re- cent fault that occurred; the History datum item H10: represents the least recent fault that occurred. The codes of the faults saved are also displayed in the corresponding menu of the Re- mote Timer Control. Press the Heating buttons to scroll the list of faults in increasing or decreasing order. Press the DHW buttons to display the value. Press the Reset button to return to the Service Menu. Press the Reset button for 20 sec- onds to exit the card Service Menu, or exiting occurs automatically after 15 minutes. "rE" - History Reset Press the Eco/Comfort button for 3 seconds to delete all the faults stored in the History Menu: the card will automatically exit the Service Menu, in order to confirm the operation. Press the Reset button for 20 seconds to exit the card Service Menu, or exiting occurs automatically after 15 minutes.

Before lighting the boiler

• Check the seal of the gas system.

• Check correct prefilling of the expansion tank.

• Fill the water system and make sure all air contained in the boiler and the system has been vented.

• 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 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 ES- CAPING; DANGER OF FIRE OR EXPLOSION. ALSO, THERE MAY BE A RISK OF ELECTRIC SHOCK OR FLOODING THE ROOM. Checks during operation

• Check the tightness of the fuel circuit and water systems.

• Check the efficiency of the flue and air/fume ducts while the boiler is working.

• 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 stages.

• Check correct boiler lighting by performing various tests, turning it on and off with the room thermostat or remote control.

• Make sure the fuel consumption indicated on the meter matches that given in the technical data table in cap. 5.

• Make sure that with no demand for heating, the burner lights correctly on opening a hot water tap. Check that in heating mode, on opening a hot water tap, the heating circulating pump stops and there is regular production of hot water.

1=LPG b02 Boiler type selection

b03 Combustion chamber type selection 5=LOW NOx Open Chamber (with fume thermostat)

b04 Primary Exchanger type selection 0 ÷ 13

b12 Enable Auto-Settings procedure 0 = Disabled 1 = Enabled

P03 Heating standby time 0-10 minutes

P10 No effect on adjustment --

1-15=1-15°C/second P17 Modulating pump max. speed - absolute Operating at 100%. Adjustable with optional cable.

P18 Modulating pump max. speed - post circulation 0-100% not operating. Always at 100% in this model

cod. 3541P711 - Rev. 00 - 12/2020

ALL MAINTENANCE WORK AND REPLACEMENTS MUST BE CARRIED OUT BY SKILLED QUALIFIED PERSONNEL. Before carrying out any operation inside the boiler, disconnect the power and close the gas cock upstream. Otherwise there may be a danger of ex- plosion, electric shock, suffocation or poisoning. Periodical inspection To ensure proper operation of the unit over time, have qualified personnel carry out a yearly inspection, providing for the following checks:

• The control and safety devices (gas valve, flow switch, thermostats, etc.) must func- tion correctly.

• The fume exhaust circuit must be perfectly efficient. (Sealed chamber boiler: fan, pressure switch, etc. - The sealed chamber must be tight: seals, cable glands, etc.) (Open chamber boiler: anti-backflow device, fume thermostat, etc.)

• The air/fume terminal and ducts must be free of obstructions and leaks

• The burner and exchanger must be clean and free of deposits. Do not use chemical products or wire brushes to clean.

• The electrode must be properly positioned and free of deposits. fig. 14 - Electrode positioning

• The gas and water systems must be tight.

• The pressure of the water in the system when cold must be approx. 1 bar; otherwise, bring it to that value.

• The circulating pump must not be blocked.

• The expansion tank must be filled.

• The gas flow and pressure must match that given in the respective tables.

Diagnostics The boiler has an advanced self-diagnosis system. In case of a boiler fault, the display will flash together with the fault symbol (detail 11 - fig. 1) indicating the fault code. There are faults that cause permanent shutdowns (marked with the letter "A"): to restore operation, press the RESET button (detail 6 - fig. 1) for 1 second or RESET on the op- tional remote timer control if installed. At this point the display will show “d4” for about 30 seconds or “d5” for about 5 minutes which indicates the waiting time after which the boiler will resume normal operation. if the boiler fails to restart, it is necessary to eliminate the fault. Other faults cause temporary shutdowns (marked with the letter “F”) which are automat- ically reset as soon as the value returns within the boiler's normal working range. List of faults Table. 2

5. TECHNICAL DATA AND CHARACTERISTICS

Table. 3- Legend, fig. 20, fig. 21 and fig. 22 Fault code Fault Possible cause Cure A01 No burner ignition No gas Check the regular gas flow to the boiler and that the air has been eliminated from the pipes Ignition/detection electrode fault Check the wiring of the electrode and that it is correctly positioned and free of any deposits Faulty gas valve Check the gas valve and replace it if necessary Gas valve wiring disconnected Check the wiring Ignition power too low Adjust the ignition power A02 Flame present signal with burner off Electrode fault Check the ionisation electrode wir- ing Card fault Check the card A03 Overtemperature protec- tion activation Heating sensor damaged Check the correct positioning and operation of the heating sensor No water circulation in the system Check the circulating pump Air in the system Vent the system F04 Fume thermostat activated (after activation of the fume thermostat, boiler operation is prevented for 20 minutes) Fume thermostat contact open Check the thermostat Wiring disconnected Check the wiring Flue obstructed or not correctly sized Check the flue

DHW outlet - Ø 1/2” Expansion vessel DHW inlet - Ø 1/2” System filling faucet System delivery - Ø 3/4” Anti-backflow device System return - Ø 3/4” Ignition and detection electrode Safety valve Diverter valve Burner Water pressure switch Copper exchanger for heating and DHW Fume thermostat Heating circulating pump Flowmeter Automatic air vent Pressure sensor Cold water inlet filter DHW exchanger DHW temperature sensor Automatic bypass Gas valve Double sensor (Safety + heating) Fault code Fault Possible cause CureDIVAtech D LN C

cod. 3541P711 - Rev. 00 - 12/2020

5.2 General view and main components

Burner nozzles G31 no. x Ø 24 x 0.5 32 x 0.5 Gas supply pressure G31 mbar 37 37Max. gas pressure at burner (G31) mbar 35.5 35.5Min. gas pressure at burner (G31) mbar 5.0 5.0Max. gas flow G31 kg/h 1.94 2.56Min. gas flow G31 kg/h 0.64 0.98 Max. working pressure in heating bar 3 3 (PMS) Min. working pressure in heating bar 0.8 0.8 Max. heating temperature °C 90 90 (tmax) Heating water content liters 0.8 1.2 Heating expansion vessel capacity liters 8 10 Heating expansion vessel precharge pressure bar 1 1 Max. working pressure in DHW bar 9 9 (PMW) Min. working pressure in DHW bar 0.3 0.3DHW flow rate t 25°C l/min 13.1 17.2DHW flow rate t 30°C l/min 10.9 14.3 (D)Protection rating IP IPX4DPower supply voltage V/Hz 230V/50HzElectrical power input W 48 52Electrical power input in DHW W 48 52Empty weight kg 27 30Type of unit

cod. 3541P711 - Rev. 00 - 12/20205.5 DiagramsPressure - power diagrams DIVAtech D LN C24A = LPG - B = NATURAL GASResidual head available for system DIVAtech D LN C24 A = Boiler pressure losses - 1, 2 and 3 = Circulating pump speed Pressure - power diagrams DIVAtech D LN C30A = LPG - B = NATURAL GASResidual head available for system DIVAtech D LN C30 A = Boiler pressure losses - 1, 2 and 3 = Circulating pump speed

Attention: Remove the jumper on the terminal block before connecting the room thermostat or the remote timer control. 32 Heating circulating pump42 DHW temperature sensor44 Gas valve72 Room thermostat (optional)81 Ignition/detection electrode95 Diverter valve114 Water pressure switch126 Fume thermostat136 Flowmeter138 External probe (optional)139 Remote timer control (optional)278 Double sensor (Safety + heating)

cod. 3541P711 - Rev. 00 - 12/2020

cod. 3541P711 - Rev. 00 - 12/2020

NON DISPONIBLE POUR CE MODÈLE

NON DISPONIBLE POUR CE MODÈLE

cod. 3541P711 - Rev. 00 - 12/2020

cod. 3541P711 - Rev. 00 - 12/2020