Divatech D - Central heating boiler FERROLI - Free user manual and instructions

USER MANUAL Divatech D FERROLI

DIVAtech D (F24/(F32

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

OFFSET = 20 OFFSET = 40

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

1. GENERAL INFORMATION• Read the warnings in this instruction booklet carefully since they provide importantinformation on safe installation, use and maintenance.• This instruction booklet is an integral and essential part of the product and must bekept 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 makesure the booklet stays with the boiler so that it can be consulted by the new ownerand/or installer.• Installation and maintenance must be carried out by professionally qualified person-nel, according to current regulations and the manufacturer's instructions.• Incorrect installation or inadequate maintenance can result in damage or injury. Themanufacturer declines any liability for damage caused by errors in installation anduse or by failure to follow the instructions provided.• Before carrying out any cleaning or maintenance operation, disconnect the unit fromthe power supply using the system 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 gen-uine 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 en-sure proper operation of the unit.• This unit must only be used for its intended purpose. Any other use is deemed im-proper and therefore hazardous.• After unpacking, check the good condition of the contents. The packing materialsare 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 reducedphysical, sensory or mental capabilities, or lacking experience or the necessaryknowledge, only if under supervision or they have received instructions on its safeuse and the related risks. Children must not play with the unit. Cleaning and main-tenance intended to be done by the user can be carried out by children aged at least8 years only if under supervision.• In case of doubt, do not use the unit. Contact the supplier.• The unit and its accessories must be appropriately disposed of in compliance withcurrent 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 HF is a high-efficiency sealed chamber heat generator for heating and hotwater production (optional) running on natural gas or LPG, and equipped with a micro-processor control system. The boiler is arranged for connection to an external storage tank for hotwater (optional). In this manual all the functions relevant to domestic hotwater production are only active with the optional hot water tank connect-ed as indicated in sec. 3.32.2 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 symbol15 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, duringheating 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 theunit 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.THE 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. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

Summer/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 deliver domestic 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 adjustment Use the heating buttons (details 3 and 4 - fig. 1) to adjust the temperature from a min. of 30°C to a max. of 80°C; in any case, it is advisable not to operate the boiler below 45°C. fig. 4 DHW temperature adjustment Use the DHW buttons (details 1 and 2 - fig. 1) to adjust the temperature from a min. of 40°C to a max. of 55°C. fig. 5 Room 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 will adjust the system water according to the required room temperature. For operation with remote timer control, please refer to the relevant instruction manual. ECO/COMFORT selection The 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 water contained in the boiler is kept hot, thereby ensuring immediate availability of hot water on 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 Temperature When 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 delivery temperature 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 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. 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 according to the characteristic (fig. 6). By setting the curve to 0, the sliding temperature adjustment is disabled. Press the heating buttons (detail 3 - fig. 1) to access parallel curve offset; the display shows “OF” flashing. Use the DHW buttons (detail 1 - fig. 1) to adjust parallel curve offset according to the characteristic (fig. 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 higher order curve and vice versa. Proceed by increasing or decreasing in steps of one and check the result in the room. fig. 6 - Compensation curves fig. 7 - Example of compensation parallel curve offset Adjustments 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. 1 System water pressure adjustment The filling pressure read on the boiler water gauge (detail 2 - fig. 8) with system cold must be 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 venting cycle indicated on the display by Fh. To prevent boiler shutdown, it is advisable to periodically check the pressure on the gauge with system cold. In case of a pressure below 0.8 bar, it is advisable to restore it. fig. 8- Filling knob

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.

OFFSET = 20 OFFSET = 40

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

System 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 faucet3. INSTALLATION3.1 General InstructionsBOILER INSTALLATION MUST ONLY BE PERFORMED BY QUALIFIED PERSON-NEL, IN ACCORDANCE WITH ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICALMANUAL, THE PROVISIONS OF CURRENT LAW, THE PRESCRIPTIONS OF NA-TIONAL AND LOCAL STANDARDS AND THE RULES OF PROPER WORKMANSHIP.3.2 Place of installation The combustion circuit is sealed with respect to the place of installationand therefore the unit can be installed in any room except in a garage. Theplace of installation must be sufficiently ventilated to prevent the creationof dangerous conditions in case of even small gas leaks. Otherwise theremay be a risk of suffocation and intoxication or explosion and fire. Thissafety precaution is required by EEC Directive No. 2009/142 for all gasunits, including so-called sealed chamber units.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. 25 and the symbolson 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 inheating systems and compatible with the materials of the boiler and system.Connection to a storage tank for domestic hot waterThe unit's electronic card is arranged for managing an external storage tank for domestichot water production. Carry out the plumbing connections according to the diagram of fig. 10. Carry out the electrical connections as shown on the wiring diagram in fig. 30. It is necessary to use the kit code 1KWMA11W. At the next lighting, the boiler control sys-tem detects the hot water tank probe and automatically configures the DHW function, ac-tivating the display and relevant controls.fig. 10- Diagram of connection to an external hot water tank8 Domestic hot water outlet9 Cold water inlet10 System delivery - Ø 3/4”11 System return - Ø 3/4”95 Diverter valve209 Hot water tank delivery - Ø 3/4”210 Hot water tank return - Ø 3/4”3.4 Gas connectionThe gas must be connected to the relevant connection (see fig. 25) in conformity with thecurrent standards, using a rigid metal pipe or a continuous surface flexible s/steel tubeand installing a gas cock between the system and boiler. Make sure all the gas connec-tions 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.

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

Accessing the electrical terminal blockThe electrical terminal block can be accessed after removing the casing. The layout ofthe terminals for the various connections is given in the wiring diagram in fig. 30.fig. 11- Accessing the terminal block3.6 Fume ductsImportantThe unit is a "C type" with sealed chamber and forced draught, the air inlet and fume out-let must be connected to one of the following extraction/suction systems. The unit is ap- proved for operation with all the Cny flue configurations given on the dataplate. Some configurations may be expressly limited or not permitted by law, standards or local reg- ulations. Before installation, check and carefully follow the instructions. Also, comply with the instructions on the positioning of wall and/or roof terminals and the minimum distanc-es from windows, walls, ventilation openings, etc.BafflesBoiler operation requires fitting the baffles supplied with the unit. Make sure boiler isproperly fitted with the correct baffle (if to be used).A Baffle replacement with boiler not installed B Baffle replacement with boiler and fume ducts already installed Connection with coaxial pipesfig. 12 - Examples of connection with coaxial pipes ( = Air / = Fumes)Table. 2 - TypologyFor coaxial connection, fit the unit with one of the following starting accessories. For thewall hole dimensions, refer to the figure on the cover.fig. 13 - Starting accessory for coaxial ductsTable. 3- Baffles for coaxial ducts

Type Description C1X Wall horizontal exhaust and inlet C3X Roof vertical exhaust and inlet Coaxial 60/100 Coaxial 80/125 Max. permissible length DIVAtech D HF24 = 5 m DIVAtech D HF32 = 5 m 10 m Reduction factor 90° bend 1 m 0.5 m Reduction factor 45° bend 0.5 m 0.25 m Baffle to use 0 ÷ 2 m DIVAtech D HF24 = Ø43 DIVAtech D HF32 = Ø45 0 ÷ 3 m DIVAtech D HF24 = Ø43 DIVAtech D HF32 = Ø45 2 ÷ 5 m no baffle 3 ÷ 10 m no baffle

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

Connection with separate pipesfig. 14 - Examples of connection with separate pipes ( = Air / = Fumes)Table. 4 - TypologyFor the connection of separate ducts, fit the unit with the following starting accessory:fig. 15 - Starting accessory for separate ducts code 010031X0Before installation, check the baffle to use and that the maximum permissible length isnot exceeded, by means of a simple calculation:1. Establish the layout of the system of split flues, including accessories and outlet ter-minals.2. Consult table 6 and identify the losses in m (equivalent meters) of every compo-nent, according to the installation position.3. Check that the sum total of losses is less than or equal to the maximum permissiblelength in table 5.Table. 5- Baffles for separate ductsTable. 6 - AccessoriesConnection to collective fluesfig. 16 - Examples of connection to collective flues ( = Air / = Fumes)Table. 7 - Typology If the boiler is to be connected DIVAtech D HF to a collective flue or to a single flue with natural draught, the flue or chimney must be expressly designed by professionally qual-ified technical personnel in conformity with the current regulations and be suitable forsealed chamber units equipped with fan.Type Description C1X Wall horizontal exhaust and intake. The inlet/outlet terminals must be concentric or close enough to be undergo similar wind conditions (within 50 cm) C3X Roof vertical exhaust and intake. Inlet/outlet terminals like for C12 C5X Wall or roof exhaust and intake separate or in any case in areas with different pressures. The exhaust and intake must not be positioned on opposite walls. C6X Intake and exhaust with separately certified pipes (EN 1856/1) B2X Intake from installation room and wall or roof exhaust IMPORTANT - THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATIONDIVAtech D HF24 DIVAtech D HF32Max. permissible length 60 m

TERMINAL fumes, wall 1KWMA90A - 7.0 ATTENTION: CONSIDER THE HIGH PRESSURE LOSSES OF Ø60 ACCESSORIES; USE THEM ONLY IF NECESSARY AND AT THE LAST FUME EXHAUST SECTION.Type Description C2X Intake and exhaust in common flue (intake and exhaust in same flue) C4X Intake and exhaust in common and separate flues, but undergoing similar wind conditions C8X Exhaust in single or common flue and wall intake B3X Intake from installation room by means of concentric duct (that encloses the exhaust) and exhaust in common flue with natural draught IMPORTANT- THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION C93 Exhaust to a vertical terminal and intake from existing flue. C8X C2X C4X C93C93 cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

All adjustment, conversion, commissioning and maintenance operations described below must only be carried out by Qualified Personnel (meet- ing 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 un- qualified and unauthorized persons tampering with the unit.

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

pressure, proceed in increments of 1 or 2 units of the parameter "q02" by pressing the DHW “+” button: after each change, wait 10 seconds for the pressure to stabi- lise.

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.

7. Press the DHW “-” button to adjust the parameter "q01" until the minimum nominal

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

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 stabi- lise.

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/Comfor t 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 fol- lowing section. The heating and DHW symbols (fig. 19) flash on the display; the heating power will ap- pear alongside. fig. 19 - 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%). 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. 17 - Gas valve

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

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). 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. Contents Description Range Parameter b01 Gas type selection 0=Natural Gas

2=Monothermal instantaneous 3=Heating only (3-way valve) 4=Heating only (circulating pump) b03 Combustion chamber type selec- tion 0=Sealed Chamber combustion con- trol (without fume pressure switch)

1=Open Chamber (with fume thermo- stat) 2=Sealed Chamber (with fume pres- sure switch) 3=Sealed Chamber Combustion con- trol (with fume thermostat on recuperator) 4=LOW NOx Sealed Chamber Com- bustion control (without fume pressure switch) 5=LOW NOx Open Chamber (with fume thermostat) b04 Primary Exchanger type selection 0 ÷ 13

(for model HF32) b05 Variable output relay operation selection (b02=1) 0 = External gas valve

NOT AVAILABLE FOR THIS

MODEL 1 = System filling solenoid valve 2 = Solar 3-way valve 3 = Supply indicator with fault present 4 = Supply indicator without fault present 5 = External circulating pump (during demand and post circulation) No effect on adjustment (b02=2) --

No effect on adjustment (b02=3) -- No effect on adjustment (b02=4) -- b06 Mains Voltage Frequency 0=50Hz

No effect on adjustment (b02=2) -- No effect on adjustment (b02=3) -- No effect on adjustment (b02=4) -- b08 Gas valve driver 0 = Standard, 1 0 b09 DHW demand type selection 0 = Flow switch

No effect on adjustment (b02=3) -- No effect on adjustment (b02=4) -- b12 Enable Auto-Settings procedure 0 = Disabled 1 = Enabled

P03 Heating standby time 0-10 minutes

1=Linked to setpoint 2=Solar

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 MenuPAR_INFO 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 MenuThe 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 ResetPress the Eco/Comfort button for 3 seconds to delete all the faults stored in the HistoryMenu: 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 occursautomatically after 15 minutes.4.2 CommissioningBefore 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 systemhas 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 ofthe boiler IF THE ABOVE INSTRUCTIONS ARE NOT OBSERVED THERE MAY BERISK OF SUFFOCATION OR POISONING DUE TO GAS OR FUMES ES-CAPING; DANGER OF FIRE OR EXPLOSION. ALSO, THERE MAY BE ARISK OF ELECTRIC SHOCK OR FLOODING THE ROOM.Checks during operation• Switch the unit on.• 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 waterproduction stages.• Check correct boiler lighting by performing various tests, turning it on and off withthe room thermostat or remote control.• Make sure the fuel consumption indicated on the meter matches that given in thetechnical data table in cap. 5.• Make sure that with no demand for heating, the burner lights correctly on opening ahot water tap. Check that in heating mode, on opening a hot water tap, the heatingcirculating pump stops and there is regular production of hot water.• Make sure the parameters are programmed correctly and carry out any requiredcustomisation (compensation curve, power, temperatures, etc.).4.3 MaintenanceIMPORTANT ALL MAINTENANCE WORK AND REPLACEMENTS MUST BE CARRIEDOUT BY SKILLED QUALIFIED PERSONNEL.Before carrying out any operation inside the boiler, disconnect the powerand close the gas cock upstream. Otherwise there may be a danger of ex-plosion, electric shock, suffocation or poisoning.Periodical inspectionTo ensure proper operation of the unit over time, have qualified personnel carry out ayearly 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 betight: 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 chemicalproducts or wire brushes to clean.• The electrode must be properly positioned and free of deposits.fig. 20 - 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. P15 CO2 limit Offset (b03=0)0 (Minimum)30 (Maximum) No effect on adjustment (b03=1) --No effect on adjustment (b03=2) --CO2 limit Offset (b03=3)0 (Minimum)30 (Maximum)CO2 limit Offset (b03=4)0 (Minimum)30 (Maximum)No effect on adjustment (b03=5) -- P16 Exchanger protection activation0=No F43 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. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

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. 8

O system circulation Check the circulating pump Air in the system Vent the system F50 Gas valve fault Modulating Operator wiring dis- connected Check the wiring Faulty gas valve Check the gas valve and replace it if necessary A51 Poor combustion fault Inlet/exhaust flue obstruction Check the flue

System delivery - Ø 3/4”

Ignition and detection electrode

Water pressure switch

Copper exchanger for heating and DHW

Hot water tank delivery

Hot water tank return

Heating circulating pump

Double sensor (Safety + heating)

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

Data Unit DIVAtech D HF24 DIVAtech D HF32Max. heating capacity kW 25.8 34.4 (Q)Min. heating capacity kW 8.3 11.5 (Q)Max. Heat Output in heating kW 24.0 32.0 (P) Min. Heat Output in heating kW 7.2 9.9 (P) Efficiency Pmax (80-60°C) % 93.0 93.1Efficiency 30% % 90.5 91.0 NOx emissions class - 3 (<150 mg/kWh) (NOx) Burner nozzles G20 no. x Ø 11 x 1.35 15 x 1.35 Gas supply pressure G20 mbar 20.0 20.0Max. gas pressure at burner (G20) mbar 12.0 12.0 Min. gas pressure at burner (G20) mbar 1.5 1.5 Max. gas flow G20

Burner nozzles G31 no. x Ø 11 x 0.79 15 x 0.79 Gas supply pressure G31 mbar 37 37Max. gas pressure at burner (G31) mbar 35.0 35.0 Min. gas pressure at burner (G31) mbar 5.0 5.0 Max. gas flow G31 kg/h 2.00 2.69Min. gas flow G31 kg/h 0.65 0.90 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 1.0 1.2 Heating expansion vessel capacity liters 8 10 Heating expansion vessel precharge pressure bar 1 1 Protection rating IP X5D X5DPower supply voltage V/Hz 230V/50HzElectrical power input W 110 135Empty weight kg 32 35Type of unit

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

5.5 DiagramsPressure - power diagrams DIVAtech D HF24A = LPG - B = NATURAL GASCirculating pump head / pressure losses DIVAtech D HF24 A = Boiler pressure losses - 1, 2 and 3 = Circulating pump speed Pressure - power diagrams DIVAtech D HF32A = LPG - B = NATURAL GASCirculating pump head / pressure losses DIVAtech D HF32 A = Boiler pressure losses - 1, 2 and 3 = Circulating pump speed

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

Attention: Remove the jumper on the terminal block before connecting the room thermostat or the remote timer control. 16 Fan32 Heating circulating pump44 Gas valve72 Room thermostat (optional)81 Ignition/detection electrode95 Diverter valve114 Water pressure switch138 External probe (optional)139 Remote timer control (optional)155 Hot water tank probe (optional)278 Double sensor (Safety + heating)

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

OFFSET = 20 OFFSET = 40

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

OFFSET = 20 OFFSET = 40

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF

cod. 3541P871 - Rev. 01 - 04/2019DIVAtech D HF