Pegasus D - Uncategorized FERROLI - Free user manual and instructions

USER MANUAL Pegasus D FERROLI

cod. 3540U174 - Rev. 04 - 11/2018EN 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, Thank you for choosing a FERROLI boiler featuring advanced design, cutting-edge tech- nology, high reliability and quality construction. Please read this manual carefully sinceit provides important information on safe installation, use and maintenance.PEGASUS D is a high-efficiency heat generator for domestic hot water production (op-tional) and heating, suitable for operation with blown oil or gas burners. The boiler shellconsists of cast-iron elements, assembled with double cones and steel stays. The controlsystem is with microprocessor and digital interface with advanced temperature controlfunctions. The boiler is arranged for connection to an external storage tank for hotwater production (optional). In this manual all the functions relevant todomestic hot water production are only active with the optional hot watertank connected as indicated in sec. 3.32.2 Control panelfig. 1 - Control panel Key 1 = Button -2 = Button +3 = Heating system temperature setting decrease button4 = Heating system temperature setting increase button5 = Display6 = Summer / Winter mode selection button7 = Not used8 = Reset button9 = Unit On / Off button10 = Sliding Temperature" menu button16 = Outside sensor temperature (with optional outside sensor) 17 = Appears on connecting the outside Sensor or the Remote Timer Control (optionals)18 = Room temperature (with optional Remote Timer Control)19 = Burner On20 = Antifreeze operation21 = Heating system pressure22 = Fault23 = Heating delivery temperature / setting24 = Heating symbol25 = Heating mode26 = Set heating delivery temperature reached27 = Summer mode2.3 Lighting and turning offBoiler not electrically poweredfig. 2 - Boiler not electrically powered The antifreeze system does not work when the power and/or gas to the unit areturned off. To avoid damage caused by freezing during long idle periods in win-ter, it is advisable to drain all water from the boiler, or add a suitable antifreezeto the heating system, in compliance with that prescribed in sec. 3.3.Boiler lighting• Open the fuel on-off valves.• Switch on the power to the unit.fig. 3 - Boiler lighting• For the following 120 seconds the display will show FH which identifies the heatingsystem air venting cycle.• During the first 5 seconds the display will also show the card software version.• When the message FH disappears, the boiler is ready to operate automaticallywhenever domestic hot water is drawn or in case of a room thermostat demand.Turning the boiler off Press the on/off button (detail 9 - fig. 1) for 1 second. fig. 4 - Turning the boiler offWhen the boiler is turned off, the electronic board is still powered.Heating operation is disabled. The antifreeze system remains activated. To relight the boiler, press the on/off button (detail 9 - fig. 1) again for 1 second. fig. 5The boiler will be immediately ready to operate whenever domestic hot water is drawnor in case of a room thermostat demand.Shutting down the boiler for prolonged periodsTo turn off the boiler:• Press the ON/OFF button (9 - fig. 1)• Close the gas cock ahead of the boiler.• Disconnect the power to the unit. To avoid damage caused by freezing during long idle periods in winter, it is ad-visable to drain all the water from the boiler; DHW and system. Otherwise, drainjust the DHW circuit and add a suitable antifreeze to the heating system, com-plying with that prescribed in sec. 3.3.

cod. 3540U174 - Rev. 04 - 11/20182.4 AdjustmentsSummer/Winter Switchover Press the summer/winter button (detail 6 - fig. 1) for 1 second. fig. 6The display activates the Summer symbol (detail 27 - fig. 1): the boiler will only deliverdomestic hot water. The antifreeze system remains activated. To deactivate the Summer mode, press the summer/winter button (part. 6 - fig. 1) again for 1 second.Heating temperature setting 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. 7DHW temperature adjustment Use the DHW buttons -/+ (details 1 and 2 - fig. 1) to adjust the temperature from a min. of 10°C to a max. of 65°C.fig. 8Room temperature adjustment (with optional room thermostat)Using the room thermostat, set the temperature desired in the rooms. If the room ther-mostat is not installed the boiler will keep the heating system at its setpoint temperature.Room temperature adjustment (with optional remote timer control)Using the remote timer control, set the temperature desired in the rooms. The boiler unitwill set the system water according to the required room temperature. For information onthe remote timer control, please refer to its user's manual.Sliding temperatureWhen the optional external probe is installed the control panel display (detail 5 - fig. 1)shows the actual outside temperature read by the probe. The boiler control system op-erates with "Sliding Temperature". In this mode, the temperature of the heating systemis adjusted according the outside weather conditions, in order to ensure high comfort andenergy saving throughout the year. In particular, as the outside temperature increases,the system delivery temperature is decreased according to a specific "compensationcurve".With Sliding Temperature adjustment, the temperature set with the heating buttons -/+(details 3 and 4 - fig. 1) becomes the maximum system delivery temperature. It is advis-able to set a maximum value to allow system adjustment throughout its useful operatingrange.The boiler must be adjusted at the time of installation by qualified personnel. Possibleadjustments can in any case be made by the user to improve comfort.Compensation curve and curve offset Press the mode button (detail 10 - fig. 1) once to display the actual compensation curve (fig. 9), which can be modified with the DHW buttons (details 1 and 2 - fig. 1). Adjust the required curve from 1 to 10 according to the characteristic (fig. 11).By setting the curve to 0, sliding temperature adjustment is disabled.fig. 9 - Compensation curve Press the heating buttons (details 3 and 4 - fig. 1) to access parallel curve offset (fig. 12), modifiable with the DHW buttons (details 1 and 2 - fig. 1). fig. 10 - Curve parallel offset Press the mode button (detail 10 - fig. 1) again to exit parallel curve adjustment mode. 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. 11 - Compensation curvesfig. 12 - 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. Also, the control pan-el display (detail 5 - fig. 1) shows the actual room temperature detected by theRemote Timer Control.Table. 1

eco bar Heating temperature settingAdjustment can be made from the Remote Timer Control menu and the boiler control panel.DHW temperature adjustmentAdjustment can be made from the Remote Timer Control menu and the boiler control panel.Summer/Winter SwitchoverSummer mode has priority over a possible Remote Timer Control heating demand.Eco/Comfort selectionOn disabling DHW from the Remote Timer Control menu, the boiler selects the Economy mode. In this condition, the button 7 - fig. 1 on the boiler panel is dis-abled.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 button 7 - fig. 1 on the boiler panel.Sliding TemperatureBoth the Remote Timer Control and the boiler card manage Sliding Temperature adjustment: of the two, the Sliding Temperature of the boiler card has priority.

cod. 3540U174 - Rev. 04 - 11/2018Water system pressure adjustmentThe filling pressure with system cold, read on the display, must be approx. 1.0 bar. If thesystem pressure falls to values below minimum, the boiler card will activate fault F37(fig. 13).fig. 13 - Low system pressure fault Once the system pressure is restored, the boiler will activate the 120-secondair venting cycle indicated on the display by FH.3. 2. INSTALLATION83.1 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 installationThe boiler unit must be installed in a specific room with ventilation openings to the out-side as prescribed by current regulations. If there are several burners or suction unitsthat can work together in the same room, the ventilation openings must be sized for si-multaneous operation of all the units. The place of installation must be free of flammablematerials or objects, corrosive gases, powders or volatile substances that, conveyed bythe burner fan, can obstruct the internal lines of the burner or the combustion head. Theroom must be dry and not exposed to rain, snow or frost. If the unit is enclosed in a cabinet or mounted alongside, a space must be pro-vided for removing the casing and for normal maintenance operations.3.3 Plumbing connectionsThe heating capacity of the unit must be previously established by calculating the build-ing's heat requirement according to the current regulations. The system must be provid-ed with all the components for correct and regular operation. It is advisable to installshutoff valves between the boiler and heating system allowing the boiler to be isolatedfrom the system if necessary. 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.Do not use the water system pipes to earth electrical appliances.Before installation, carefully wash all the pipes of the system to remove any residuals orimpurities that could affect proper operation of the unit.Carry out the relevant connections according to the diagram in cap. 5.1 and the symbolsgiven on the unit.Water system characteristicsIn the presence of water harder than 25° Fr (1°F = 10ppm CaCO3), use suitably treatedwater in order to avoid possible scaling in the boiler. Treatment must not reduce the hard-ness to values below 15°F (Decree 236/88 for uses of water intended for human con-sumption). Treatment of the water used is indispensable in case of very large systemsor with frequent introduction of replenishing water in the system. If water softeners are installed at the boiler cold water inlet, make sure not toreduce the water hardness too much, as this could cause early deterioration ofthe magnesium anode in the hot water tank.Antifreeze system, antifreeze fluids, additives and inhibitorsThe boiler is equipped with an antifreeze system that turns on the boiler in heating modewhen the system delivery water temperature falls under 6°C. The device will not comeon if the electricity and/or gas supply to the unit are cut off. If it becomes necessary, it ispermissible to use antifreeze fluid, additives and inhibitors only if the manufacturer ofthese fluids or additives guarantees they are suitable for this use and cause no damageto the heat exchanger or other components and/or materials of the boiler unit and sys-tem. It is prohibited to use generic antifreeze fluid, additives or inhibitors that are not ex-pressly suited for use in heating systems and compatible with the materials of the boilerunit and system.Connection to a storage tank for domestic hot water productionThe unit's electronic board is arranged for managing an external storage tank for domes-tic hot water production. Carry out the plumbing connections according to the diagramfig. 14 (pumps and non-return valves must be supplied separately). Carry out: electricalconnections as shown in the wiring diagram i ncap. 5.4. A probe FERROLImust be used.At the next lighting, the boiler's control system recognises the presence of the hot watertank probe and automatically configures the DHW function, activating the display and rel-evant controls.fig. 14 - Diagram of connection to external hot water tank Key 8 Domestic hot water outlet9 Cold water inlet10 System delivery11 System return3.4 Gas connection Before making the connection, make sure the unit is arranged for operation withthe type of fuel available and carefully clean all the system gas pipes to removeany residuals or impurities that could affect proper operation of the boiler.The gas must be connected to the respective union (see fig. 25) in conformity with cur-rent regulations, with a rigid metal pipe or with a continuous surface flexible s/steel tube,installing a gas cock between the system and boiler. Make sure all the gas connectionsare tight.The capacity of the gas meter must be sufficient for the simultaneous use of all the ap-pliances connected to it. The diameter of the gas pipe leaving the boiler does not deter-mine the diameter of the pipe between the unit and the meter; it must be chosenaccording to its length and pressure losses, in conformity with the current regulations. Do not use the gas pipes to earth electrical appliances.3.5 Electrical connectionsConnection to the electrical grid The unit's electrical safety is only guaranteed when correctly connected to anefficient earthing system executed according to current safety standards. Havethe efficiency and suitability of the earthing system checked by professionallyqualified personnel. The manufacturer is not responsible for any damagecaused by failure to earth the system. Also make sure that the electrical systemis adequate for the maximum power absorbed by the unit, as specified on theboiler dataplate.The boiler is prewired and provided with a Y-cable and plug for connection to the elec-tricity line. The connections to the grid must be made with a permanent connection andequipped with a bipolar switch whose contacts have a minimum opening of at least 3mm, interposing fuses of max. 3A between the boiler and the line. It is important to re-spect the polarities (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-greenwire) in making connections to the electrical line. During installation or when changingthe 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 person- nel. If changing the electric power cable, use solely “HAR H05 VV-F” 3x0.75 mm2 cable with a maximum outside 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. 3540U174 - Rev. 04 - 11/2018Accessing the electrical terminal block Undo the two screws “A” located on the top part of the control panel and remove the cover. fig. 15 - Accessing the terminal board

All adjustment and conversion operations must be carried out by Qualified Personnel. The manufacturer declines any liability for damage and/or injury caused by unqualified and unauthorised persons tampering with the unit. Turning on TEST mode 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 symbol (detail 24 - fig. 1) and DHW symbol (detail 12 - fig. 1) flash on the display. fig. 16 - TEST mode To deactivate the TEST mode, repeat the activation sequence. The TEST mode is automatically disabled in any case after 15 minutes. Heating system output adjustment On PEGASUS D boilers, the firebox heating power and therefore the heat output deliv- ered to the heating water can only be adjusted by means of the main burner through the gas valve, (see fig. 17). The diagrams given in the section cap. 5.2 indicate the variation in heat output delivered to the water according to the change in burner operating pres- sure. Being able to adjust boiler output to the actual heating requirements means above all reducing heat losses, and therefore obtaining fuel saving. Also, with the variation in output, also regulated by the provisions, the boilers keep their efficiency levels and com- bustion characteristics practically unchanged This operation is carried out with the boiler working and the water storage tank heated.

1. Using a small screwdriver, remove the secondary operator protection cap 5 of the

gas valve of fig. 17.

2. Connect a manometer to the pressure point 2 (fig. 17) located below the gas valve,

and turn the boiler thermostat knob to the maximum value.

3. Adjust the pressure to the required value by means of the screw 6 (fig. 17), referring

to the diagrams given in section cap. 5.2.

4. Then turn the burner on and off 2 or 3 times by means of the control thermostat and

check that the pressure value is that just set; otherwise, another adjustment must be made to bring the pressure to the correct value. Gas conversion The unit can work with either Natural gas (G20-G25) or liquefied gas (G30-G31) and is factory-set for use with one of the two gases, as clearly shown on the packing and data- plate. Whenever a different gas to that for which the unit is arranged has to be used, the special conversion kit will be required, proceeding as follows:

1. Replace the nozzles at the main burner and pilot burner, fitting the nozzles specified

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

2. Remove the small protection cap 3 (fig. 17) from the gas valve. Using a small screw-

driver, adjust the ignition “STEP” for the required gas (G20-G25 position D fig. 17 or G30-G31 position E fig. 17); then refit the cap.

3. Adjust the gas pressure at the burner, setting the values given in the technical data

table for the type of gas used.

4. Apply the sticker contained in the conversion kit, near the dataplate as proof of the

conversion. fig. 17 - Pressure adjustment A Gas valve B Decrease pressure C Increase pressure D Ignition “STEP” adjustment for G20-G25 NATURAL gas E Ignition step adjustment for G30-G31 LIQUEFIED gas 1 Pressure point upstream 2 Pressure point downstream 3 Protection cap 4 Ignition STEP regulator 5 Protection cap 6 Pressure adjustment screw

System start-up must be carried out by Qualified Personnel. Checks to be made at first lighting and after all maintenance operations that involved discon- necting from the systems or an operation on safety devices or parts of the boil- er: 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.

• Fill the water system and make sure all air contained in the boiler and system has been vented by opening the air vent valve on the boiler and any vent valves on the system.

• Make sure there are no water leaks in the system, domestic hot water circuits, con- nections or boiler.

• Check the correct connection of the electrical system.

• Make sure the unit is connected to an efficient earthing system.

• Make sure there are no flammable liquids or materials in the immediate vicinity of the boiler.

• Vent the air from the gas pipes by means of the gas valve pressure point 1 (fig. 17). Lighting Open the fuel on-off valves. Connect the power to the unit. For the next 120 seconds the display will show FH which identifies the heating system air venting cycle. During the first 5 seconds the display will also show the card software release. When the message FH disappears, the boiler is ready to operate automatically whenever domestic hot water is drawn or in case of a room thermostat demand.

If, after correctly carrying out the lighting procedures, the burners do not light and the message A01 appears on the display, wait about 15 seconds and then press the RESET pushbutton. The reset controller will repeat the lighting cycle. If the burners do not light after several of attempts, consult the "Troubleshoot- ing" section.

In case of a power failure while the boiler is working, the burners will go out and relight automatically when the power is restored.

Air/fume ducts The diameter of the connecting pipe to the flue must not be less than that of the connec- tion on the anti-backflow device. Starting from the anti-backflow device it must have a vertical section at least 50 cm long. The current regulations must be respected regarding the dimensioning and installation of the flues and connection pipe. The boiler is a B11BS type equipped with a safety device (fume thermostat) that stops the supply of gas and shuts down the unit in case of poor draught or disturbance in the fume exhaust. Unit shutdown is indicated on the display with the code F04 (ref. cap. 3.4). Restarting of the unit occurs automatically 20 minutes after the end of the fault that caused the problem. In case of repeated intervention of the device, contact qualified per- sonnel to check the flue and chimney and eliminate the fume evacuation fault.

This safety device must never be tampered with or deactivated. Any operation on the device, or its replacement, must only be carried out by qualified person- nel using the manufacturer's original replacement parts. A functional test must be carried out after any operation on the device. PEGASUS D

cod. 3540U174 - Rev. 04 - 11/2018Checks during operation• Make sure the fuel circuit and water systems are tight.• Check the efficiency of the flue and fume ducts while the boiler is working.• Make sure the water is circulating properly between the boiler and the systems.• Check correct lighting of the boiler, by turning it on and off several times.• Make sure the fuel consumption indicated on the meter matches that given in thetechnical data table on cap. 5.3.

• Check the correct delivery of domestic hot water with the 't given in the technical data table: do not trust measurements made with empirical systems. The measure-ment should be made with specific instruments and as close as possible to the boil-er, also considering the heat loss from the pipes.4.3 Maintenance The following operations must only be carried out by Qualified Personnel. Seasonal inspection of the boiler and flueIt is advisable to have the following checks carried out at least once a year:• The control and safety devices (gas valve, thermostats, etc.) must function correctly.• The fume ducts must be clean and free of obstructions.• The gas and water systems must be tight.• The burner and exchanger must be clean. Follow the instructions in the next section.• The electrodes must be free of scale and properly positioned (see fig. 21).• The water pressure in the system when cold must be approx. 1 bar; otherwise bringit to that value.• The expansion tank must be filled.• The gas flow and pressure must correspond to that given in the respective technicaldata tables.• The circulating pumps must not be blocked.Opening the front panelTo open the front panel, see the sequence in fig. 18. Before carrying out any operation inside the boiler, disconnect the electricalpower supply and close the gas cock upstream.fig. 18 - Front panel openingCleaning the boiler and flueTo clean the boiler properly (fig. 19):• Close the gas cock ahead of the boiler and disconnect the electrical power.• Remove the front panel of the boiler.• Lift the casing cover by pressing upwards.• Remove the insulation placed over the anti-backflow device.• Remove the fume chamber closing plate.• Remove the burner assembly (see next section).• Clean from the top downwards, using a flue brush.• Clean the fume evacuation ducts between the cast iron elements of the boiler shellwith a vacuum cleaner.• Carefully refit all the previously removed parts and check the tightness of the gascircuit and the combustion ducts.• During cleaning operations be careful not to damage the fume thermostat bulb atthe back of the fume chamber.fig. 19 - Boiler cleaning1 Casing cover2 Fume chamber closing plate3 Flue brushRemoving and cleaning the burner assemblyTo remove the burner assembly:• Disconnect the electrical power supply and turn off the gas ahead of the boiler;• Undo the nut fixing the gas supply pipe ahead of the gas valve;• Undo the two nuts fixing the combustion chamber door to the cast iron elements ofthe boiler (fig. 20)• Remove the burner assembly and combustion chamber door.Then check and clean the main burners and pilot burner. Use a non-metal brush or com-pressed air to clean the burners; never use chemical products.fig. 20 - Removing the burners

cod. 3540U174 - Rev. 04 - 11/2018Pilot burner assemblyfig. 21 - Pilot burner1 Combustion chamber door2 Inspection door3 Pilot burner4 Ignition electrode5 Detection electrode6 Pilot nozzle7 High voltage cable8 Gas supply pipe4.4 TroubleshootingDiagnosticsThe boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault, thedisplay will flash together with the fault symbol (detail 22 - 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 8 - fig. 1) for 1 second or use the RESET onthe remote timer control (optional) if installed; if the boiler does not restart, it is necessaryto firstly 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.Table. 2 - List of faults

Fault code Fault Possible cause Cure A01 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 necessaryIgnition power too low Adjust the ignition power A02 Flame present signal with burner offElectrode fault Check the ionisation electrode wiringCard fault Check the card A03 Overtemperature protection activationHeating sensor damagedCheck the correct positioning and operation of the heating sensorNo water circulation in the systemCheck the circulating pumpAir in the system Vent the system F04 Fume thermostat inter-vention (after intervention of the fume thermostat, boiler operation is pre-vented for 20 minutes)Fume thermostat contact open Check the thermostatWiring disconnected Check the wiringFlue obstructed or not correctly sizedChange the flueWiring faultJumper of terminals 12-13 not connectedCheck the wiring A06 No flame after the ignition phaseLow pressure in the gas systemCheck the gas pressureBurner minimum pressure settingCheck the pressures F10 Delivery sensor 1 faultSensor damagedCheck the wiring or replace the sensorWiring shortedWiring disconnected F14 Delivery sensor 2 faultSensor damagedCheck the wiring or replace the sensorWiring shortedWiring disconnected F34 Supply voltage under 170V Electric mains trouble Check the electrical system F35 Faulty mains frequency Electric mains trouble Check the electrical system F37 Incorrect system water pressureSystem empty Fill the systemWater pressure switch dam-aged or not connectedCheck the sensor F39 External probe faultProbe damaged or wiring shortedCheck the wiring or replace the sensorProbe disconnected after activating the sliding temperatureReconnect the external sensor or disable the sliding temperature F40 Incorrect system water pressurePressure too highCheck the systemCheck the safety valveCheck the expansion tank A41 Sensor positioningDelivery sensor disconnected from the pipeCheck the correct positioning and operation of the heating sensor F42 Heating sensor fault Sensor damaged Replace the sensor F47 System water pressure sensor faultWiring disconnected Check the wiring A48 Gas valve faultGas valve wiring fault Check the wiringFaulty gas valve Replace the gas valveCard fault Replace the card A49 Gas valve faultGas valve wiring fault Check the wiringFaulty gas valve Replace the gas valveCard fault Replace the card PEGASUS D

5.1 Dimensions, couplings and main components

Pressure loss water side fig. 24 - Pressure loss to mbar B Flowrate l/h

Number of elements kW 3 4 5 Max. heating capacity kW 25.3 34.9 49.5 (Q) Min. heating capacity kW 10.1 14.9 19.7 (Q) Max. heat output in heating kW 23.0 32.0 45.0 (P) Min. heat output in heating kW 8.8 13.0 17.2 (P) Efficiency Pmax (80-60°C) % 90.9 91.7 90.9 Efficiency 30% % 91.3 91.5 91.6 Efficiency class Directive 92/42 EC NOx emission class 2 2 2 Burner nozzles G20 no. x Ø 2x2.80 3x2.80 4x2.80 Gas supply pressure G20 mbar 20 20 20 Max. pressure downstream of gas valve G20 mbar 15 13 15 Min. pressure downstream of gas valve G20 mbar 2.5 2.5 2.5 Max. gas delivery G20