Unical ALKON 50 kW, Installation And Servicing Manual

Page 1: ...00333009 a 3rd edition 02 10 ALKON 70 kW ALKON 50 kW INSTALLATION ANDSERVICING MANUAL ENGLISH ...

Page 2: ...nnection of additional safety devices for ALKON 50 70 in batterie 32 3 18 Practical connection diagrams 33 3 19 Management connections diagram with E8 regulator 36 3 20 Examples of installation functional diagram 38 3 21 Examples of installations with optional kits 44 3 22 Filling the system 48 3 23 COMMISSIONING 48 Preliminary checks 49 Ignition and switching off 49 Information to be supplied to ...

Page 3: ...ntly on the basis of the lime scale found this period can be extended to two years 1 4 INFORMATION TO BE HANDED OVER TO THE USER 1 GENERAL INFORMATION NOTE Suggestions for the user WARNING Indicates a potentially dangerous situation for the product and the environment DANGER Indicates serious danger for your personal safety and for your life The user has to be instructed on the use and operation o...

Page 4: ...nents which influence the appliance s safe operation WARNING When tightening or loosening the screw pipe connections use only adequate fork spanners The improper use and or the use of inadequate equipment can cause damages for example water or gas leakages WARNING Indications for appliances operating with propane gas Ensure yourself that before installing the appliance the gas tank has been purged...

Page 5: ...203 1 18 F factor N stars based on the quality of water declared EN 13203 1 19 PMW Max pressure D H W system 20 T max Max temperature D H W system C Electrical features 21 Electrical power supply 22 Consumption 23 Protection grade D Countries of destination 24 Direct and indirect country of destination 25 Gas family 26 Supply pressure E Factory setting 27 Adjusted for gas type X 28 Space for natio...

Page 6: ...ctrical supply to the boiler by means of the ON OFF switch and or by means of the appropriate shutdown devices Do not obstruct the intake outlet terminal ducts In the event of failure and or faulty functioning of the appliance switch off the boiler Do not attempt to make any repairs contact qualified technicians Any repairs must be carried out by Unical authorized technicians and using only origin...

Page 7: ...rn 1 1 for 70 kW M CH flow system 1 1 for 70 kW G Gas Inlet Ø Sc Outlet condensate drain siphon corpo alluminio SV 135 180 78 266 A S Scf Outlet condensate drain siphon proveniente dal tubo scarico fumi SV Safety valve outlet A Air intake S Flue Outlet TECHNICAL FEATURES AND DIMENSIONS 2 2 DIMENSIONS Automatic air vent Drain condensate siphon Control panel with electrical protection IP X4D eBUS de...

Page 8: ...imensions 1510 502 762 1978 712 3040 500 1500 2431 1972 1740 DIMENSIONS ALKON 50 70 KIT SAFETY DEVICES HYDRAULIC HEADER Y FILTER KIT DIMENSIONS ALKON 50 70 in BATTERY n 2 boilers KIT SAFETY DEVICES HYDRAULIC HEADER Y FILTER KIT ...

Page 9: ...1972 500 1500 1740 3726 2510 1972 500 1500 1740 4630 DIMENSIONS ALKON 50 70 in BATTERY n 3 boilers KIT SAFETY DEVICES HYDRAULIC HEADER Y FILTER KIT DIMENSIONS ALKON 50 70 in BATTERY n 4 boilers KIT SAFETY DEVICES HYDRAULIC HEADER Y FILTER KIT ...

Page 10: ...VENT VALVE MODULATING FAN AIR INTAKE OPENING Ø80 mm FLUE OUTLET PIPE Ø80 mm PIPE WITH SMOKE SAMPLING AND CONDENSATE EVACUATION CONNECTION SIPHON GAS VALVE SPACER PIPE REPLACEABLE FOR MOUNTING OF OPTIONAL CIRCULATOR FLOW TEMPERATURE SENSOR RETURN TEMPERATURE SENSOR OVERHEAT THERMOSTAT IGNITION TRANSFORMER MIN WATER PRESSURE SWITCH IGNITION ELECTRODE SAFETY VALVE ALKON 50 ...

Page 11: ...VALVE MODULATING FAN AIR INTAKE OPENING Ø80 mm FLUE OUTLET PIPE Ø80 mm SIPHON GAS VALVE FLOW TEMPERATURE SENSOR RETURN TEMPERATURE SENSOR OVERHEAT THERMOSTAT IGNITION ELECTRODE SAFETY VALVE MODULANTING PUMP MIN WATER PRESSURE SWITCH PIPE WITH SMOKE SAMPLING AND CONDENSATE EVACUATION CONNECTION IGNITION TRANSFORMER ...

Page 12: ...ON 50 2 4 BOILER WATER CIRCUIT DIAGRAM 1 Gas valve 2 CH flow temperature sensor 3 CH return temperature sensor 4 Condensate drain siphon 5 Overheat thermostat 6 Heat exchanger 7 Burner 8 Air vent valve 9 Flue outlet Air intake 10 Fan 11 Premix 12 Room sealed chamber 13 Replaceable pipe for insertion optional pump only for ALKON 50 modulating pump only for ALKON 70 14 Safety valve 6 bar 15 Pressure...

Page 13: ...onal modulating pump Electrical protection Net weight For information regarding the adjustment of INJECTORS BURNER PRESSURES DIAPHRAGMS OUTPUTS GAS CONSUMPTIONS please refer to the paragraph ADAPTMENT TO THE USE OF OTHER GASES 48 5 9 6 47 2 9 1 97 29 94 9 4 49 3 10 3 101 62 107 33 97 80 98 42 0 58 0 311 43 6 21 44 26 84 7 8 19 7 71 5 33 9 5 2 20 67 5 9 6 65 5 9 1 97 06 94 9 4 68 5 10 3 101 51 107 ...

Page 14: ...he gas type available This is verifiable via the indication on the packaging and on the data badge c Check that the chimney flue pipe has an adequate draught does not have any constrictions and that no other appliance s flue outlets have been fitted unless the chimney is serving more than one heating appliance according tothe specific standards and regulations in force The connection between the b...

Page 15: ...he gas supply company The installation must be carried out in accordance to the codes of practice the regulations and the requirements hereby indicated which constitute an indicative list but not a complete one as these continue to undergo revisions Moreover the boiler must be installed in accordance to all the regulations regarding the boiler room the building regulations and the prescriptions re...

Page 16: ...a vertical and solid wall capable of adequately supporting the weight of the boiler The wall must not be made of inflammable material CONNECTIONS ALKON 50 ALKON 70 M CH system flow 1 1 R CH system return 1 1 G Gas Supply 3 4 3 4 S Condensate Drain 840 85 110 110 7 177 R M G 132 S 310 5 206 5 3 3 PACKAGING The ALKON 50 70 boiler is supplied fully assembled in a strong cardboard box After having unp...

Page 17: ...and requirements in force foreseeing on off valves gas filter anti vibrating joint etc Before commissioning an internal gas distribution system and therefore before connecting it to the gas meter the complete installation must be tested for gas soundness If any part of the system is concealed from view the gas soundness test must be carried out before covering the pipes DANGER The gas connection m...

Page 18: ... M WARNING ITISABSOLUTELYFORBIDDENTOFITON OFF VALVES ON THE GENERATOR TO THE FORE OFTHESAFTEYDEVICES WARNING Before installing the boiler we recommend that the system is flushed out with a suitable product in order to eliminate any metallic tooling or welding residues oil and grime which could reach the boiler and affect the proper running of the boiler Non observance of these instructions could c...

Page 19: ...49 3 2826 2120 ALKON 50 68 5 3927 2946 ALKON 70 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 0 200 400 600 800 1000 0 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 0 3400 3600 3800 4000 4200 4400 4600 4800 5000 5200 5400 5600 5800 6000 6200 6400 6600 6800 7000 7200 7400 7600 7800 8000 3800 4000 4200 4400 4600 4800 5000 ALKON 50 ALKON 70 3 8 DETER...

Page 20: ...essure PROTECTIVE DEVICES 3 Overheat thermostat it has the function of shutting down the generator if the safety thermostat fitted in the boiler malfunctions It must be calibrated to a value of 100 C which MUST not be changed 4 Safety pressure switch it has the function of shutting down the generator if it reaches the maximum working pressure It must be able to be reset manually 3 9 SUPPLEMENTAL S...

Page 21: ... It must be dimensioned for the capacity of the boiler and must comply to the regulations in force WARNING Please remember that it is forbidden to interpose between the boiler and the pressure relief valve any type of cutting off device Moreover it is recommended to use cutting off valves which do not exceed the maximum allowable operating pressure WARNING In correspondence to the heating pressure...

Page 22: ...circuit dirt optimal air venting hydraulic de coupling of the two hydraulic circulation circuits balancing of the circuits 3 12 MIXING HEADER FILTER UNICAL suggests the installation of a Y filter on the return pipe so that it can be cleaned if necessary This filter will protect the boiler from the heating system dirt 3 13 MIXING HEADER cod 00361333 00361499 00361500 ...

Page 23: ...lied with the boiler there must be no bottlenecks the connection must be made just under the bottom part of the boiler it must be installed so as to avoid freezing of the liquid when the boiler is operating and prevent the eventual pres surization of the sewage system consent the correct downflow of the appliance s liquid di scharges it must be made with one of the following materials which are re...

Page 24: ...lime scale deposit corrosion sludge deposits microbiological growths moulds bacteria etc An appropriate treatment of the supply water will prevent the above stated problems and will maintain the correct operation and efficiency of the generator in time For this purpose it will be necessary to fix the following chemical physical characteristics of the water PH include between 6 5 and 8 Hardness 15 ...

Page 25: ...ustion to the outside through concentric or twin ducts The minimum distance between the air inlet duct and the flue gas outlet duct must be of 250 mm and moreover both terminals must be positioned within a 500 mm square area C43 Boiler designed for connection to collective flue systems including two ducts one for the air inlet and the other for the discharge of products of combustion through con c...

Page 26: ...n 1 m L max 30 m TSC0130C 00310012 KIT5770C TSC0130C FLUE OUTLETS Ø 80 mm Type B23 The total allowed linear maximum length of the smoke evacuation and air intake pipes of Ø 80 mm is 30 m including one wide radius curve and one evacuation terminal ATTENTION In the case in which danger of freezing subsists the insulation of the smoke evacuation pipe is recommended on the whole length in both cases o...

Page 27: ...UCTS Ø 80 125 mm Type C 13 L min 1 m L max 5 m 00361256 00361255 00360357 The minimum allowed length of the horizontal coaxial pipes is 1 meter The maximum allowed length of the horizontal coaxial pipes is 5 meters For every additional curve the maximum allowed length must be reduced by 1 meter besides the duct has to have an upward inclination of 3 in the direction of exit so that to allow the co...

Page 28: ...0361255 Fit the assembly pipe adapter on the boiler as shown in figure VERTICAL FLUE OUTLET WITH COAXIAL DUCTS Ø80 125 mm TYPE C 33 The minimum allowed length of the horizontal coaxial pipes is 1 meter The maximum allowed length of the horizontal coaxial pipes is 7 meters For every additional curve the maximum allowed length must be reduced by 1 meter Layout NOT suitable for ALKON 70 ...

Page 29: ...ns Fit the supplied pipe of Ø 80 mm as shown in the picture The maximum allowed pressure drop independently from the type of installation doesn t have to overcome the value of 60 Pa L min 2 m 1 air intake not less than 1 smoke evacuation L max 30 m 15 air intake 15 smoke evacuation KIT5780C KIT5770C TSC0130C TSC0130C ...

Page 30: ...inexpert people to use the appliance Mains electrical supply connection 230V Mains electrical supply connection 230V The boiler is provided complete with a mains supply cable 1 5 m long and with a cross section area of 3x0 75 mm2 The electric connections of the boiler are shown in the section named ACTUAL WIRING DIAGRAM paragraph 3 18 page 33 A mains supply of 230 V 50 Hz is required The wiring to...

Page 31: ... carrying out any operations on the electrical parts For the connection remove the existing jumper The opening of the additional safety devices doesn t stop the boiler pump operation C C 2 NC Thermostat Pressostat Prearrangement for the connection of the additional safety devices LIGHTBLUE LIGHTB LUE LIGHTBLUE For the connection of the E8 heating controller to remove the bridge wire existing betwe...

Page 32: ... existing jumper C C 2 NC LIGHTBLUE Supplie Relais Boiler 1 Boiler 2 Boiler 3 Boiler 4 Thermostat Pressostat Prearrangement for the connection of the additional safety devices LIGHTBLUE LIGHTBLUE Attention To maintain isolated the contacts ISPESL of the different boilers suffers the ache operation of the same ones Connection of the additional safety devices for ALKON in battery ...

Page 33: ...ote The pictures shown on the actual wiring diagram is purely indicative 2 1 VM ORANGE BLACK BROWN PWM BLUE TACHO 4 5 LIGHT BLUE N 1 2 BROWN L1 3 RIL REG ALIM 230V SRR SR BROWN BROWN BLUE YELL GREEN L1 N 230 V 50 Hz GREEN GREEN WHITE WHITE LIGHT BLUE LIGHT BLUE BROWN VG E ACC LIGHT BLUE BROWN YELL GREEN RED TL TF BLACK SS E RIV WHITE BLACK DK WHITE BROWN LIGHT BLUE BLUE LIGHT BLUE LIGHT BLUE BROWN...

Page 34: ...TION GREY WHITE GREEN GREEN WHITE WHITE LIGHT BLUE BLACK WHITE BROWN Prearrangement for the connection of the additional safety devices LIGHT BLUE LIGHT BLUE LIGHT BLUE BROWN BROWN LIGHT BLUE LIGHT BLUE BROWN E ACC Ignition electrode E RIV Detection electrode DK Minimum water pressure switch MDV Motor 3 way valve PM Modulatin pump SR CH sensor SRR CH return sensor SS DHW sensor optional TL Limit t...

Page 35: ... LIGHT BLUE N 1 2 BROWN L1 3 ALIM 230V BROWN LIGHT BLUE PM YELL GREEN LIGHT BLUE BROWN VM LIGHT BLUE N 1 2 BROWN L1 3 ALIM 230V BROWN LIGHT BLUE MVD RED GREEN 1 3 2 BLUE BROWN BLUE DK WHITE BROWN P LIGHT BLUE BROWN YELL GREEN P Boiler pump at constant flow rate controlled via an ON OFF Room thermostat P Boiler pump at constant flow rate controlled via the heating controller E8 ...

Page 36: ...ions and the other one is for the low tension connections The main controls necessary for the C H system manage ment and for the boiler control as well some components which are part of the boiler house must be connected to the terminal blocks Power terminal assignments 230V Power terminal block Sensor terminal block Terminal II II A1 A2 A3 A4 A5 A6 N L1 L1 M T1 T2 6 7 8 9 10 1 2 3 4 5 N L 1 L 1 1...

Page 37: ... tank middle sensor FBR heat circ 1 room sensor Buf stor tank top sensor FBR heat circ 1 set value 1 2 V SPF F12 F11 VF Terminal V V VF SPF Pin 1 C H Flow sensor circuit 1 sensor Multifunction 1 Pin 2 D H W Tank low sensor sensor Multifunction 2 1 2 VIII PT1000 F14 F13 Terminal VIII F13 F14 Pin 1 Solar sensor 2 Sensor Multifunction relay 3 Pin 2 1 Sensor multifunction relay 4 Solar sensor Terminal...

Page 38: ...WN INTHIS MANUAL ARE DOABLE BY USINGTHE E8 REGULATOR SUPPLIED AS AN OPTION BEFORE USING OTHER MODELS OF REGULATORS MAKE SURETHEY ARE COMPATIBLE 3 20 INSTALLATION EXAMPLES functional wiring and connections description INSTALLATION OF A BOILERWITH CONNECTIONTO A DIRECT HEATING ZONE 9 10 outdoor sensor AF 1 Flow sensor heating circuit 1 VF 10 I 10 Ground outdoor sensor 4 Collector pump ...

Page 39: ...el optional Outside Sensor INSTALLATION OF A BOILERWITH CONNECTIONTOTWO DIRECT HEATING ZONES D H W PRODUCTION 9 10 outdoor sensor 6 7 Storage tank sensor 4 Pump heating circuit 1 5 Pump heating circuit 2 6 Cylinder charging pump SPF AF n 5 Re circulation pump storage tank VF 4 5 Flow sensor heating circuit 2 1 Flow sensor heating circuit 1 VF 10 I 10 Ground outdoor sensor ...

Page 40: ...ional Outside Sensor INSTALLATION OF A BOILERWITH CONNECTIONTO ONE MIXED AND ONE DIRECT HEATING ZONES D H W PRODUC n 5 Re circulation pump storage tank 9 10 outdoor sensor 6 7 Storage tank sensor 4 Pump heating circuit 1 5 Pump heating circuit 2 6 Cylinder charging pump SPF AF VF 4 5 Flow sensor heating circuit 2 1 Flow sensor heating circuit 1 VF 10 I 10 Ground outdoor sensor ...

Page 41: ...door sensor 4 5 Flow sensor heating circuit 2 6 7 Storage tank sensor 4 Pump heating circuit 1 5 Pump heating circuit 2 6 Cylinder charging pump 7 Mixer motor heating circuit 2 OPEN 8 Mixer motor heating circuit 2 CLOSE SPF AF 1 Mixer motor heating circuit 1 OPEN 2 Mixer motor heating circuit 1CLOSE n 5 Re circulation pump storage tank VF 1 Flow sensor heating circuit 1 VF 10 I 10 Ground outdoor s...

Page 42: ...eating circuit 1 5 Pump heating circuit 2 6 Cylinder charging pump SPF AF n 5 Re circulation pump storage tank VF V 2 Hot water tank low Multifunction relay sensor 2 2 PT1000 sensor solar 1 Multifunction relay sensor 4 PT1000 4 Collector pump 7 Mixer motor heating circuit 2 OPEN 8 Mixer motor heating circuit 2 CLOSE 1 Mixer motor heating circuit 1 OPEN 2 Mixer motor heating circuit 1CLOSE 1 Flow s...

Page 43: ...et the parameter SC in the ALKON 50 1st master sc 00 2nd slave sc 01 3rd slave sc 02 4th slave sc 03 Connections on to the MASTER controller The connections of the secondary circuit have to be done on to the MASTER controller n 5 Re circulation pump storage tank 4 Collector pump 1 Flow sensor heating circuit 1 VF 10 I 10 Ground outdoor sensor 9 10 outdoor sensor 4 5 Flow sensor heating circuit 2 6...

Page 44: ...OPTIONAL KITS REGULATION ACCESSORIES 00361332 E8 regulator kit 00361359 Box for E8 regulator kit 00361358 BM8 remote control kit DN 50 DN 50 DN 50 3 2 5 9 1 11 4 CONNECTION OF AN EXTERNAL D H W TANK 00361668 Kit of electrical wiring for an ext D H W tank for ALKON 50 00361736 Kit of electrical wiring for an ext D H W tank for ALKON 70 INSTALLATION OF A SINGLE ALKON 50 70 1 00361366 Supporting fram...

Page 45: ...62430 Elbow 45 Ø 160 00262431 Elbow 87 Ø 160 00262432 Extension Ø 160 L 250 00262433 Extension Ø 160 L 500 00262434 Extension Ø 160 L 1000 00262435 Extension Ø 160 L 2000 00262438 Inspection terminal Ø 160 REGULATION ACCESSORIES 00361332 E8 regulator kit 00361359 Box for E8 regulator kit 00361358 BM8 remote control kit DN 65 DN 50 DN 50 DN 50 DN 50 DN 65 11 1 8 2 3 9 4 6 2 5 Note The insulation of...

Page 46: ...61450 Blind flanges kit SMOKE ACCESSORIES 00262430 Elbow 45 Ø160 00262431 Elbow 87 Ø 160 00262432 Extension Ø 160 L 250 00262433 Extension Ø 160 L 500 00262434 Extension Ø 160 L 1000 00262435 Extension Ø 160 L 2000 00262438 Inspection terminal Ø 160 Note The insulation of the battery flow and return ma nifolds is suggested EGULATION ACCESSORIES 00361332 E8 regulator kit 00361359 Box for E8 regulat...

Page 47: ...flanges kit SMOKE ACCESSORIES 00262430 Elbow 45 Ø 160 00262431 Elbow 87 Ø 160 00262432 Extension Ø 160 L 250 00262433 Extension Ø 160 L 500 00262434 Extension Ø 160 L 1000 00262435 Extension Ø 160 L 2000 00262438 Inspection terminal Ø 160 Note The insulation of the battery flow and return ma nifolds is suggested REGULATION ACCESSORIES 00361332 E8 regulator kit 00361359 Box for E8 regulator kit 003...

Page 48: ...bleeds and make ascertain the good operation of the automatic air vent fitted in the boiler open progressively the filling valve and make sure the automatic air vent in the system work properly close the bleeders of the radiators when water starts to come out control via the manometer bargraph that the water pressure has reached a minimum value of 0 8 1 bar close the filling valve and bleed again ...

Page 49: ... with water DANGER Before firing the appliance fill up the siphon through the filling hole and check the correct drainage of the condensate If the appliance is used with the condensate drain siphon empty this could lead to danger of there are no water leaks all the necessary ventilation conditions and minimum clearance distances are guaranteed for subsequent servicing LIGHTING AND SHUTTING DOWN PR...

Page 50: ...ng point in the flue inlet outlet terminal Pressing simultaneously the keys plus and minus for at least 3 seconds the boiler will operate in the CH mode at the maximum output led 1 illuminated B Min output adjustment By pressing the key decrease again the boiler will operate at the minimum output led 1 blinking MAXIMUM OUTPUT ADJUSTMENT SCREW A Check that the C02 values are within the values indic...

Page 51: ... the boiler goes into lockout slacken the screw A again of one turn than retry the ignition If the boiler goes into lockout again carry out the above indicated operations until the boiler is lighted At this point carry out the burner adjustment as previously indicated If necessary correct the value by turning the adjustment screw B in a CLOCKWISE direction to increase the value and in an ANTICLOCK...

Page 52: ...ervoir has not been properly bleeded lighting problems can rise In such a case revert your self to the supplier of the reservoir For the conversion of the boiler from a gas to an other one it is necessary to proceed as follows 1 Remove the front casing 2 Set the maximum pressure adjusting screw A at approximately half range and screw of a turn the minimum pressure adjusting screw B as shown on pag...

Page 53: ...A G I A L L O B L U A Z Z U R R O V I O L A G I A L L O B L U BURNER MODULATION LEVEL IN IGNITION Continue to change the parameters by pressing the key decrease The successive parameter which can be changed is BURNER MODULATION LEVEL IN IGNITION IG Press the YELLOW key and the LIGHT BLUE key simultane ously to enter in the service mode SE and change the values of the pre set operating parameters A...

Page 54: ...ons A B C for setting the desired value from 20 to 60 C Standard setting 35 C SETTING OF THE MAXIMUM HEATING TEMPERATU RE Continue to change to the parameters by pressing the key decrease The successive parameter which can be changed is SETTING OF THE MAXIMUM HEATING TEMPERATURE HH A Z Z U R R O V I O L A G I A L L O B L U Repeat the operations A B C for setting the desired value from 65 to 85 C S...

Page 55: ...lar attention will prolong the life of the boiler The frequency of servicing will be determined by the service engineer and will depend on the appliance s state of condition 4 INSPECTION AND SERVICING SCHEDULE INSTRUCTIONS FOR INSPECTION AND SERVICING To ensure a long life to all your boiler components and in order not to alter the conditions of the approved product only original UNICAL spare part...

Page 56: ...d clean the siphon carry out the following steps disconnect the transparent pipe 1 check that no deposits have accumulated inside the siphon 2 unscrew the plastic nuts 3 and 4 and to remove the siphon Verify if there are any deposits flush them out with clean water reassemble the siphon in reverse order Danger Before commissioning the appliance fill the siphon via the filling hole and check the co...

Page 57: ...n Corrective action Press the reset key on the panel 5 FAULT FINDING 2 1 3 5 1 ERROR CODES The boiler is fitted with an integrated diagnostic readout which in case of malfunction consents the immediate individuation of the type of fault directly on the control panel display In the following fault finding table our purpose is to give some technical information regarding the solutions to any problem...

Page 58: ...orrective action Press the reset key on the control panel Code Code Description Alteration of the operating parameters caused by EMC disturbances Corrective action Restore the factory parameters Code Description Flame signal detected before the ignition cycle Corrective action Disconnect the detection electrode s wire from the control board if the error code disappears replace the cable otherwise ...

Page 59: ...d with the E8 5064 heating controller 5 3 DISPLAY OF ERROR CODES ON HEATING CONTROLLER E8 Code Description Insufficient gas pressure Corrective action Check the pressure if the pressure is correct control the gas switch and or its wiring Code Description Difference between the temperature of the CH sensor SR and the temperature of the heating return sensor SRR 35 C Corrective action Examine the sy...

Page 60: ...alve Code Description Internal fault Corrective action Replace the Control PCB Description Fault at the heating flow sensor SR Corrective action Corrective action Check the efficiency of the sensor and or its wiring E 8 E 11 E 20 E 10 E 12 Code Description Alteration of the operating parameters caused by EMC disturbances Corrective action Restore the factory parameters E 30 Code E 16 Code E 26 Cod...

Page 61: ...ers in Castel d Ario MN via Roma 123 in qualità di azienda costruttrice di caldaie a gas a condensazione as gas fired condensing boiler manufacturers DICHIARA DECLARE Gli apparecchi sopra menzionati hanno ottenuto i requisiti di rendimento energetico corrispondente a 4 Stelle secondo la Direttiva Rendimenti 92 42 EEC dall Ente Omologante CERTIGAZ The a m appliances with output up to 400 kW have ob...

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Page 64: ...ag info unical ag com The Unical declines every responsibility for the possible inaccuracies if owed to errors of transcript or press Also reserves the right to bring those changes that it will hold necessary to it own products or profits without jeopardizing its essential characteristics ...