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RX90 RX91 - Arzatoare CIB Unigas

1. OOOO X CY 5 JN zii 14 zn 2 2007 EV2 PA PGMN VPS50x 0133 03 BARRA DI TERRA ST EARTH TERMINAL 7 SERVOCOMANDO SERRANDA ARIA SERVOCOMANDO SERRANDA ARIA ALTERNATIVO SERVOCOMANDO SERRANDA ARIA ALTERNATIVO AIR DAMPER ACTUATOR AIR DAMPER ACTUATOR ALTERNA TIVE AIR DAMPER ACTUATOR AL TERNA TIVE saL33 03 STM30 24015 51 641NLP SQM40 265Axx HIGH FLAM HIGH FLAM HIGH FLAM Y2 SOSTA E ACCENSIONE SOSTA E ACCENSIONE I SOSTA E ACCENSIONE BURNER AUXILIARY STAND BY AND IGNITION STAND BY AND IGNITION STAND BY AND IGNITION 3 BASSA FIAMMA GAS BASSA FIAMMA GAS BASSA FIAMMA GAS VEDI FOGLIO 3 GAS LOW FLAME GAS LOW FLAME GAS LOW FLAME 50 40 265 IV NON USATA IV NON USATA SEE SHEET 3 NOT USED NOT USED V NON USATA NOT USED VI NON USATA NOT USED Data 01 10 2008 01 018 Revisione 21 Dis 0 1 2 3 4 5 8 9 10 11 12 13 14 SIGLA ITEM FUNZIONE FUNCTION SIGLA ITEM FUNZIONE FUNCTION BERGER STM30 24Q15 5
2. 100 OHM 0 C SD 4 20mA SD 0 10V SD PRESS SIEMENS Fig 26 Fully modulating burners Fig 25 Probes connection Probes connection Probes connection by means of the 7 pins plug Fig 27 see Fig 25 for connections Fig 27 Rotation of fan motor Once the electrical connection of the burner is executed remember to check the rotation of the fan motor The motor should rotate according to the arrow symbol on the body In the event of wrong rotation reverse the three phase supply and check again the rota tion of the motor CAUTION check the motor thermal cut out adjustment NOTE the burners are supplied for three phase 400V supply and in the case of three phase 230V supply it is necessary to modify the electrical connections into the terminal box of the electric motor and replace the overload tripped relay UNIGAS M039175CD ADJUSTING AIR AND GAS Combustion head gas pressure curves depending on the flow rate Curves are referred to pressure Ombar in the combustion head The curves referred to the gas pressure in the combustion head depending on the gas flow rate are referred to the burner properly adjusted percentage of residual in the flues as shown in the Recommended combustion values table and CO in the standard limits During this stage the combustion head the gas
3. EV1 EV2 SERVOCOMANDO SERRANDA ARIA ALTERNATIVO AIR DAMPER ACTUATOR ALTERNATIVE STM30 24Q15 51 641NLP ALTA FIAMMA HIGH FLAME I SOSTA E ACCENSIONE STAND BY AND IGNITION BASSA FIAMMA GAS GAS LOW FLAME IV NON USATA USED VPS504 VPS50x PA PGMIN SERVOCOMANDO SERRANDA ARIA ALTERNATIVQ AIR DAMPER ACTUATOR ALTERNATIVE SQM40 265Axx ALTA FIAMMA HIGH FLAME I SOSTA E ACCENSIONE STAND BY AND IGNITION BASSA FIAMMA GAS GAS LOW FLAME IV NON USATA USED V NON USATA NOT USED VI NON USATA NOT USED vc cx mm un Pid SQL SOM STM30 240 5 51 641NLP 50 40 265 TEST TEST ER FC 2 BARRA DI TERRA amp LB LSPG EARTH TERMINAL 7 ALIMENTAZIONE AUSILIARI BRUCIATORE BURNER AUXILIARY SUPPLY VEDI FOGLIO 3 SEE SHEET 3 Data 01 10 2008 01 Revisione Dis 21 018 10 13 2 VERSIONE MODULANTE MODULATING VERSION FRONTALE QUADRO FRONT CONTROL PANEL TA ES SIEMENS LFL 13xx SIEMENS RWF40 0x0
4. oA 1 TN Gas train 3 DN65 80 100 Gas train with valves group MBC 1900 3100 50005 2 valves gas filter pressure governor VPS504 gas proving system MANUFACTURER INSTALLER 4 19 4 5 7 8 1 8 Manual cutoff valve 2 Butterfly valve 10 VGD Valves group 3 Gas proving system 14 Pressure governor with filter 4 Maximum gas pressure switch 18 MBC Valves group 2 with filter provided 5 Minimum gas pressure switch 19 MBC Valves group DN65 80 100 6 Gas filter 7 Bellows unit Note the high gas pressure switch can be mounted either upstream or downstream the gas valve but upstream the butterfly gas valve see item no 4 in the scheme above 12 UNIGAS M039175CD Assembling the gas train To assemble the main gas train proceed as follows gas supply network direction arrows for installation Gasket Gas filter Gas valves group Bellows unit Manual valve Fig 8 Example for gas train 1 a in case of threaded joints use proper seals according to the gas used 1 in case of flanged joints place a gasket no 1 Fig 8 between the items 2 fasten all the items by the screws according to the shemes shown observing the mounting direction for each item see figure above NOTE the bellows unit the manual vale and the gaskets are not part of the standard supply ATTENTION once the gas train is mounted according to the diagram on
5. RX90 RX91 Gas burners Low NOx series MANUAL OF INSTALLATION USE MAINTENANCE DIB UNIGAS BURNERS BRUCIATORI BRULERS BRENNER QUEMA WARNINGS THIS MANUAL IS SUPPLIED AS AN INTEGRAL AND ESSENTIAL PART OF THE PRODUCT AND MUST BE DELIVERED TO THE USER INFORMATION INCLUDED IN THIS SECTION ARE DEDICATED BOTH TO THE USER AND TO PERSONNEL FOLLOWING PRO DUCT INSTALLATION AND MAINTENANCE THE USER WILL FIND FURTHER INFORMATION ABOUT OPERATING AND USE RESTRICTIONS IN THE SECOND SECTION OF THIS MANUAL WE HIGHLY RECOMMEND TO READ IT CAREFULLY KEEP THIS MANUAL FOR FUTURE REFERENCE GENERAL INTRODUCTION The equipment must be installed in compliance with the regulations in force following the manufacturer s instructions by qualified per sonnel Qualified personnel means those having technical knowledge in the field of components for civil or industrial heating systems sanitary hot water generation and particularly service centres authorised by the manufacturer Improper installation may cause injury to people and animals or damage to property for which the manufacturer cannot be held lia ble e Remove all packaging material and inspect the equipment for inte grity In case of any doubt do not use the unit contact the supplier The packaging materials wooden crate nails fastening devices plastic bags foamed polystyrene etc should not be left within the
6. N lt ES Lao B gt Li TV Co L a S ecu 7 Z gt gt ve gt 7 yt YW WA Ds SE lt d F2 m MV Shy 10 Qc EE ALIMENTAZIONE AUSILIARI BRUCIATOR 1 1 lt BURNER AUXILIARY SUPPLY as 2 12 15 cz n Qc JE 2 3 G zZ 400V ac Data 01 10 2008 Revisione 01 FOGLIO Dis 21 018 SIEMENS LFL 1 3 CONTROL BOX Automatic programme in the event of interruption and indication of posi tion when interrupted By default in the event of any kind of interruption the flow of fuel is imme diately interrupted At the same time the programmer stops and this indi cates the position at the time of the interruption A symbol on the indicator disc shows each time the type of stoppage 4 No start up for example fault in the CLOSED signal for the limit contact 2 at terminal 8 or some other contact between the terminals 12 and 4 or 4 and 5 is not closed 4 Start up suspended because of a fault in the OPEN signal for the limit contact A at terminal 8 P Block due to absence of air pressure signal From this moment onwards any absence of air pressure will cause a block E Block due to malfunction of the flame detector circuit v Start up interrupted because there is a fault in the MINMUM signal for the auxiliary contact of the
7. 2980 15 d Go 10 25 OD 5 2 5 15 e 0 5 20 40 60 80 100 120 140 160 60 80 100 120 140 160 180 200 220 Stm h Stm h Caution the gas rate value is quoted on the x axis the related network pressure is quoted on the y axis pressure value in the combustion chamber is not included To know the minimum pressure at the gas train inlet necessary to get the reque sted gas rate add the pressure value in the combustion chamber to the value read on the y axis 21 UNIGAS M039175CD Adjusting air and gas flow rates Gas Filter The gas filters remove the dust particles that are present in the gas and prevent the elements at risk e g burners counters and regu lators from becoming rapidly blocked The filter is normally installed upstream from all the control and on off devices VPS504 Gas proving system The VPS504 check the operation of the seal of the gas shut off valves This check is carried out as soon as the boiler thermostat TAB gives a start signal to the burner creating by means of the diaphragm pump inside it a pressure in the test space of 20 mbar higher than the supply pressure When wishing to monitor the test install a pressure gauge into the pressure supply point PA If the test cycle is satisfactory after a few seconds the con sent light LC yellow comes on Otherwise the lockout light LB red comes on To restart it is necessary t
8. Gas filter maintenance ATTENTION Before opening the filter close the manual cutoff valve downstream the filter and bleed the gas check that inside the filter there is no pressurised gas To clean or remove the filter proceed as follows 1 remove the cap unscrewing the fixing screws 2 remove the filtering cartridge B clean it using water and soap blow it with compressed air or replace it if necessary 3 replace the cartridge in its proper position taking care to place it inbetween the guides as not to hamper the cap replacement 4 be sure to replace the ring into its place C and replace the cover fastening by the proper screws Inspection and replacement of the MULTIBLOC DUNGS MBC SE filter Threaded valves group Inspect the filter at least once a year e Change the filter if pressure value between pressure connections 1 and 2 is grea ther than 10 mbar e Change the filter if pressure value between pressure connections 1 and 2 is twice as high compared to the last inspection 1 Interrupt gas supply close ball valve 2 Remove screws 1 2 3 Replace the filter insert 3 4 Screw in screws 1 2 without use force to fasten Fig 30 5 Perform leakage and funcion test 6 Pay attention that dirt does not fall inside the valve Space requirements for fitting filter A from 150 to 230 mm 32 UNIGAS M039175CD Replacing the spring in the gas valve group To replace the spring
9. vr AO Ta on else 1 sl ol cd ed pat 2 EA EA ES E E Overall dimensions boiler recommended drilling template and burner flange C I B UNIGAS M039175CD LO LO LO LO LO tO oO 9 IT o T oO l l l l gt NIN IN JN IN NOTE the overall dimensions are referred to burners provided with Siemens VGD valves gas valves size DN UNIGAS M039175CD Performance Curves RX90 RX91 12 12 10 1 O MN A OO 200 600 1000 1400 1800 400 800 1200 1600 2000 PRESSURE IN COMBUSTION CHAMBER mbar kW kW To get the input in kcal h multiply value in KW by 860 Data are referred to standard conditions atmospheric pressure at 1013mbar ambient temperature at 15 NOTE The performance curve is a diagram that represents the burner performance in the type approval phase or in the laboratory tests but does not represent the regulation range of the machine On this diagram the maximum output point is usually reached by adj suting the combustion
10. OPERATION ATTENTION before starting the burner up be sure that the manual cutoff valves are open and check that the pres sure upstream the gas train complies the value quoted on paragraph Technical specifications 1 Turn to the ON position the main switch on the burner s control panel see Fig 29 2 Check the control box is not locked LED B on and eventually release it by means of the pushbutton C reset for more informa tion about the device please refer to the manual s Appendix 3 Check the series of thermostats or pressure switches gives the burner the start signal for operating closed contact 4 Check that the gas pressure the gas network is sufficient if the pressure is normal the LED E lights up 5 gas proving system checking cycle starts the proving system LC LED lights up when the cycle ends VPS504 LC LB 6 The fan motor starts the servocontrol drives the air damper to the maximum opening position LED G on the pre purge time countdown starts now 7 At the end of the pre purgue time the air damper moves to the ignition position about 5 the ignition transformer is energised LED I on the solenoid gas valves EV1 and EV2 are energised LEDs on As far as burners with pilot gas train the pilot gas valves open 8 The flame must lights up within few seconds after the gas valves opening otherwise the control box locks out Few seconds after 30
11. 2 Q13014 N 2 ooo 1 G Ge M Gf oo000 0 SAAT IAA 0101 413000775952 070407071 FRONTALE FRONTALE FQA APPARECCH LFL APPARECCH LFL 00 lt gt Ex my un APPARECCH LFL2 PARECCH LFL2 IIT e FRONTALE RONTALE 11 n 00 N m 1 POS 1 BLACK T7 BIANCO WHITE T8 ARANCIO ORANGE L1 MARRONE BROWN CONN SONDE CMF CAVO 7x0 75mmq CABLE 7x0 75mmq xx COLLEGAMENTO SONDE PROBE CONNECTION CIRCUITO STAMPATO PRINTED CIRCUIT 2 COD 6100533 j Ba NEZ PGMIN VPS504 v ex mn IN Ln so SQL SQM EV2 A VPS504 1 iE L E AES eren TEST TEST j my unt Ny st TIN NIT TIN IS un ER FC
12. PRESSIONE MINIMUM GAS PRESSURE SWITCH PS PULSANTE SBLOCCO FIAMMA LOCK OUT RESET BUTTON xx COLLEGAMEN TO SONDE PROBE CONNECTION 61 lt 50 SIEMENS QAEZ QAC2 QAM2Z PT1000 1000 OHM 0 PT100 100 DHM 0 C COLLEGAMENTO SOLO PER TRASDUTTORI PASSIM TRASOUCER PASSIVE CONNECTION ONLY SD 4 20mA SD 0410V COLLEGAMENTO SOLO PER TRASDUTTORI PASSIM TRASDULER PASSIVE CONNECTION ONLY U1 SD PRESS VERDE GREEN MARRONE BROWN GL SIEMENS VPS504 2134 3 Fe Z50V
13. THERMOSTAT PRESSURE SWITCHES KA2 AUSILIARIO AUXILIARY RELAY TC TERMOCOPPIA THERMOLDUPLE 1 CONTATTORE MOTORE VENTILATORE FAN MOTOR TV TERMICO MOTORE VENTILATORE FAN MOTOR THERMAL LAF LAMPADA SEGNALAZIONE ALTA FIAMMA BRUCIATORE BURNER IN HIGH FLAME INDICATOR LIGHT VPS50x CONTROLLO DI TENUTA VALVOLE GAS GAS LEAKAGE CONTROL UNIT LB LAMPADA SEGNALAZIONE BLOCCO BRUCIATORE NDICATOR LIGHT FOR BURNER LOCK OUT LBF LAMPADA SEGNALAZIONE BASSA FIAMMA BRUCIA TORE BURNER IN LOW FLAME INDICATOR LIGHT LBF LAMPADA SEGNALAZIONE BASSA FIAMMA BRUCIA TORE BURNER IN LOW FLAME INDICATOR LIGHT LEVI LAMPADA SEGNALAZIONE APERTURA EV1 DICATOR LIGHT FOR OPENING OF ELECTRO VALVE LEV2 LAMPADA SEGNALAZIONE APERTURA EV2 NDICATOR LIGHT FOR OPENING OF ELECTRO VALVE 2 LPGMIN LAMPADA SEGNALAZIONE PRESENZA GAS IN RETE NDICATOR LIGHT FOR PRESENCE OF GAS IN THE NETWORK LS LAMPADA SEGNALAZIONE SOSTA BRUCIATORE NDICATOR LIGHT FOR BURNER STAND BY LSPG LAMPADA SEGNALAZIONE BLOCCO CONTROLLO TENUTA VALVOLE NDICATOR LIGHT FOR LEAKAGE VALVES LT LAMPADA SEGNALAZIONE BLOCCO TERMICO MOTORE VENTILATORE NDICATOR LIGHT FOR FAN OVERLOAD TRIPPED BARRA DI TERRA LTA LAMPADA SEGNALAZIONE TRASFORMATORE DI ACCENSIONE GNITION TRANSFORMER INDICATOR LIGHT MV MOTORE VENTILATORE FAN MOTOR EARTH TERMINAL PA PRESSOSTATO ARIA AIR PRESSURE SWITCH 2207 PGMAX PRESSOSTATQ GAS DI MASSIMA PRESSIONE OPTIONAL MAXIMUM PRESSURE GAS SWITCH OPTIONAL PGMIN PRESSOSTATO GAS DI MINIMA
14. UNIGAS M039175CD the gas valves opening the transformer is de energised and the LED I turns off The burner is now operating and the same time the servocontrol moves to the hi flame position 90 see page 21 Some seconds after the gas valves opening the burner starts the automatic operation it automatically switches to low or high flame stage progressive PR burners or to the operation requested by the burner modulator Fully modulating MD buners according to the requirements of the plant As far as the modulator is concerned refere to the related manual Fig 29 Burner front panel M Key A J a 0 O Main switch LED C Reset pushbutton for control box D Reset pushbutton for gas proving system only 00000 for burners provided with Siemens LDU1 1 PGMAX EV2 EVI Ne E Gas pressure switch signal LED 9 Lock out LED for gas proving system Hi flame operation LED O 9 H Lo flame operation LED F Ignition transformer operation LED p JSESET gt GAS L 2 opening LED C D M opening LED N Fan motor overload tripped
15. are in compliance with the regulations and provisions in force all gas connections are tight the boiler room ventilation openings are such that they ensure the air supply flow required by the current regulations and in any case are sufficient for proper combustion not use gas pipes to earth electrical equipment Never leave the burner connected when not in use Always shut the gas valve off In case of prolonged absence of the user the main gas delivery valve to the burner should be shut off Precautions if you can smell gas a do not operate electric switches the telephone or any other item likely to generate sparks b immediately open doors and windows to create an air flow to purge the room C close the gas valves contact qualified personnel Do not obstruct the ventilation openings of the room where gas appliances are installed to avoid dangerous conditions such as the development of toxic or explosive mixtures DIRECTIVES AND STANDARDS Gas burners European directives Directive 2009 142 EC Gas Appliances Directive 2006 95 EC on low voltage Directive 2004 108 EC on electromagnetic compatibility Harmonised standards UNI EN 676 Gas Burners EN 60335 1 Household and similar electrical appliances Safety Part 1 General requirements EN 50165 Electrical equipment of non electric appliances for house hold and similar purposes Safety requirements Light oil burners Europ
16. butterfly valve and the actuator are at the maximum opening Refer to Fig 28 showing the correct way to measure the gas pressure considering the values of pressure in combustion chamber surveyed by means of the pressure gauge or taken from the boiler s Technical specifications Key 1 Generator 2 Pressure outlet on the combustion chamber 3 Gas pressure outlet on the butterfly valve 4 Differential pressure gauge Measuring the gas pressure in the combustion head In order to measure the pressure in the combustion head insert the pressure gauge probes one into the combustion chamber s pres sure outlet Fig 28 2 to get the pressure in the combustion chamber and the other one into the butterfly valve s pressure outlet of the burner Fig 28 3 On the basis of the measured differential pressure it is possible to get the maximum flow rate in the pressure rate curves showed on the next paragraph it is easy to find out the burner s output in Stm h quoted on the x axis from the pressure measured in the combustion head quoted on the y axis The data obtained must be considered when adjusting the gas flow rate NOTE THE PRESSURE RATE CURVES ARE GIVEN AS INFORMATION ONLY FOR A PROPER SETTING OF THE GAS RATE PLEASE REFER TO THE GAS METER READING 20 UNIGAS M039175CD Pressure in combustion head gas flow rate curves RX90 RX91 30 55 25 O 20 is
17. changes according to the spring provided with the valve group SE DUNGS MBC SE Siemens SKP actuator Keys 1 spring 2 cap 15 UNIGAS M039175CD DUNGS MBC valves Performance range mbar 20 40 40 80 80 150 Siemens VGD valves with SKP actuator Performance range mbar 15 120 100 250 Once the gas train in installed execute the electrical connections for all its items gas valves group gas proving system pressure switches ATTENTION once the gas train is mounted according to the diagram on Fig 8 the gas proving test mus be performed according to the procedure set by the laws in force 16 C I B UNIGAS M039175CD ELECTRICAL CONNECTIONS Respect the basic safety rules make sure of the connection to the earthing system do not reverse the phase and neutral connections fit a differential thermal magnet switch adequate for connection to the mains ATTENTION before executing the electrical connections pay attention to turn the plant s switch to OFF and be sure that the burner s main switch is in 0 position OFF too Read carefully the chapter WARNINGS and the Electrical connections section To execute the electrical connections proceed as follows 1 remove the cover from the electrical board unscrewing the fixing screws 2 execute the electrical connections to the supply terminal board as shown in the following diagrams 3 check the direction
18. fuels Characteristics and test methods Gas Heavy oil burners European directives Directive 2009 142 EC Gas Appliances Directive 2006 95 EC on low voltage Directive 2004 108 EC on electromagnetic compatibility Harmonised standards UNI EN 676 Gas Burners CEI EN 60335 1 Household and similar electrical appliances Safety Part 1 General requirements EN 50165 Electrical equipment of non electric appliances for household and similar purposes Safety requirements National standards UNI 7824 Monobloc nebulizer burners for liquid fuels Characteristics and test methods UNIGAS M039175CD GENERAL FEATURES The gas coming from the supply line passes through the valves group provided with filter and stabiliser This one forces the pressure in the utilisation limits The electric actuator 14 that moves proportionally the air damper and the gas butterfly valve uses an adjusting cam 13 with variable shape This one allows the optimisation of the gas flue values as to get an efficient combustion The combustion head positioning determines the burner s output Fuel and comburent are routed into separated ways as far as the zone of flame gene ration combustion chamber The air comburent and fuel gas are forced into the combustion chamber The control panel 1 placed on the burner s front side shows each operating stage How to interpret the burner s Performance curve To check if the b
19. of the fan motor see next pargraph 4 refitthe panel cover WARNING The burner is provided with an electrical bridge between terminals 6 and 7 when connecting the high low flame thermostat remove this bridge before connecting the thermostat IMPORTANT Connecting electrical supply wires to the burner teminal block MA be sure that the ground wire is longer than phase and neutral ones Connect the three phase supply to terminals L1 L2 L3 and PE ground then shunt the phase and neutral wires Fig 18 for the auxi liaries on the printed circuit N terminal neutral L terminal phase ah y me 14414 44111 Fig 17 Power supply terminal board KM1 T TV Lalala MV F3 JAAA Hy 3N a c Auxiliary relais power supply Alimentazione ausiliari MIN 6 3A T MAX 10A T Fig 18 Electric motor connection Keys Fig 18 IG main switch KM1 fan motor contactor M fan motor TV fan motor thermal cutout 17 UNIGAS M039175CD Electrical wiring diagram for burners provided with printed circuit standard configuration As far as connections refer to the terminal block shown on Fig 19 PENIS Fig 19 Terminal board for connections on printed circuit 1 Connect the signal conductors from the boiler to the burner as for the next elements Fig 20 Fig 22 ST thermostat pressure switch series T
20. position repeat the air and gas adjustments described above 11 12 13 14 15 16 the air and gas rate are now adjusted at the maximum power stage go on with the point to point adjustement on the SV adjusting cam as to reach the minimum output point as for the point to point regulation move the gas low flame microswitch cam III a little lower than the maximum position 90 set the TAB thermostat to the minimum in order that the actuator moves progressively towards the low flame position move cam Ill to the minimum to move the actuator towards the low flame until the two bearings find the adjusting screw that refers to the lower position screw V1 to increase the rate unscrew to decrease Move again cam towards the minimum to meet the next screw on the adjusting cam and repeat the previous step go on this way as to reach the desired low flame point Now adjust the pressure switches see next par 25 UNIGAS M039175CD Gas throttle valve closed 17 If it is necessary to change the burner output in the low flame stage move cam the low flame position must never match the ignition position that is why cam III must be set 20 30 more than cam Il 18 Turn the burner off then start the burner up again If the adjustment is not correct repeat the previous steps Adjustment by the Siemens SQL33 actuator 1 open the electrical panel to check the fam motor rotation and act directly on the
21. that the CO value in the flue gas does not increase if the CO values are higher than the limits laid down by law slowly open the cutoff valve as to get values lower than these limits Check that the burner is operating correctly Clockwise turn the pressure switch adjusting ring nut as to increase the pressure value until the burner stops Slowly fully open the manual cutoff valve Refit the transparent plastic cover on the pressure switch Adjusting the high gas pressure switch when provided To calibrate the high pressure switch proceed as follows according to its mounting position 1 2 remove the pressure switch plastic cover if the maximum pressure switch is mounted upstreaam the gas valves measure the gas pressure in the network when flame is off by means of the adjusting ring nut VR set the value read increased by the 30 if the maximum pressure switch is mounted downstream the gas governor gas valves group and upstream the butterfly valve light the burner adjust it according to the procedure in the previous paragrph Then measure the gas pressure at the operating flow rate downstream the gas governor gas valves group and upstream the butterfly valve by means of the adjusting ring nut VR set the value read on step 2 increased by the 30 replace the plastic cover 29 UNIGAS M039175CD LIMITATIONS OF USE THE BURNER 15 AN APPLIANCE DESIGNED AND CONSTRUCTED TO OPERATE ONLY AFTER BEIN
22. the pgas value calculated before Tipo Type pressure mbar rete Minimum inlet gas Minima pressione gas in 100 200 300 400 500 600 700 800 900 Potenza Output kW Fig 5 5 C I B UNIGAS M039175CD BURNERS FEATURES Burner model identification Burners are identified by burner type and model Burner model identification is described as follows Type RX90 Model M PR S A 1 80 1 2 3 4 6 7 8 5 DESTINATION COUNTRY 6 BURNER VERSION A Standard 7 EQUIPMENT 1 2 valves gas proving system n RE 8 2 valves gas proving system maximum gas pressure switch 8 GAS CONNECTION 50 Rp2 65 DN65 Technical Specifications BURNER TYPE RX90 RX91 Bap S lt 80 mg kWh NOx emissions Class 3 EN676 2008 Maximum gas pressure 500mbar with Siemens VGD gas valves Minimum gas pressure 7 see gas curves all gas flow rates are referred to Stm h 1013 mbar pressure 15 temperature and are valid for G20 gas net calori fic value 34 02 MJ Stm NOTE ON THE BURNER WORKING SERVICE for safety reasons one controlled shutdown must be performed every 24 hours of continuous operation UNIGAS M039175CD Country and usefulness gas categories GAS CATEGORY COUNTRY GR se AU no cz ox oa vr er 1
23. 1 641NUFSERVOCOMANDO SERRANDA ARIA ALTERNATIVO AIR DAMPER SERVO CONTROL ALTERNATIVE PT100 SONDA DI TEMPERATURA TEMPERATURE PROBE CMF COMMUT MANUALE FUNZ OJFERMO IALTA FIAMMA 2 BASSA FIAMMA 3 AUTOMATI QNUAL SWITCH O OFF T HIGH FLAME 2ILOW FLAME 3 AUTOMATIC SD L 20mA SEGNALE IN CORRENTE CURRENT SIGNAL ER ELETTRODO RILEVAZIONE FIAMMA FLAME DETECTION ELECTRODE SD 0 10V SEGNALE IN TENSIONE TENSION SIGNAL ELETTROVALVOLA GAS LATO RETE 0 GRUPPO VAL VOLE GAS ELECTRO VALVE UPSTREAM OR VALVES GROUP SD PRESS SONDA DI PRESSIONE PRESSURE PROBE EV2 ELETTROVALVOLA GAS LATO BRUCIATORE 0 GRUPPO VALVOLE GAS ELECTRO VALVE DOWNSTREAM OR VALVES GROUP SD TEMP SONDA DI TEMPERATURA TEMPERATURE PROBE FI FUSIBILE AUSILIARIO AUXILIARY FUSE SIEMENS LFL 13 APPARECCHIATURA CONTROLLO FIAMMA FLAME MONITOR DEVICE F2 FUSIBILI LINEA MOTORE VENTILATORE FAN MOTOR LINE FUSES SIEMENS RWF40 0x0 REGOLATORE MODULANTE BURNER MODULATOR FUSIBILE DI LINEA LINE FUSE 5013303 SERVOCOMANDO SERRANDA ARIA AIR DAMPER SERVO CONTROL FC SONDA UV RILEVAZIONE FIAMMA ALTERNATIVA UV FLAME DETECTOR ALTERNATIVE 50 40 265 SERVOCOMANDO SERRANDA ARIA AIR DAMPER SERVO CONTROL IG TERRUT TORE GENERALE MAIN DISCONNECT OR ST SERIE TERMOSTATI PRESSDSTATI SERIES OF THERMOSTATS OR PRESSURE SWITCHES iL NTERRUTTORE LINEA AUSILIARI AUXILIARY LINE SWITCH TA TRASFORMATORE DI ACCENSIONE IGNITION TRANSFORMER AUSILIARIO AUXILIARY RELAY TAB TERMOSTATO PRESSOSTATO ALTA BASSA FIAMMA HIGH LOW
24. AB High low flame thermostat 2 Connect the signal conductors from the burner to the boiler as for the next elements Fig 20 Fig 22 LB Burner s lockout signalling LED LSPG Gas proving system lockout signalling LED 3 n case of modulating burners the 5 6 and 7 terminals on the MA teminal block are already connected to the output controller mod RWF40 A 4 pole plug coming out from the electrical panel is provided for the temperature and pressure probes connec tions see Fig 21 Note the output controller modulator is provided according to the ordered probe HHHH HABER xm SD TEMP SIEMENS QAE2 0AC2 QAM2 1000 1000 OHM 0 C PT100 100 OHM 0 C ST TAB s PG Fig 20 Progressive burners as SD 0 10 eh ST LB 40 gt gt EE SIEMENS OBE Fig 22 Fully modulating burners il s Fig 21 Probes connection Probes connection by means of the 7 pins plug Fig 23 see Fig 21 for connections Fig 23 18 UNIGAS M039175CD Electrical wiring diagram for burners with no printed circuit provided If the burner is ordered without printed circuit follow the next connections diagrams SD TEMP SD TEMP SIEMENS QAEZ2 QAC2 QAM2Z PT1000 1000 OHM 0 C
25. EMENS RWF40 LB LBF LEV2 LPGMIN LS LSPG LT LTA MV PA PGMAX PGMIN PS PT100 SD 010V SD 0 4 20mA SD PRESS SD TEMP ST STM SQM SQL TA TAB TC TV VPS504 ATTENTION MANUAL SWITCH 0 OFF 1 HIGH FLAME 2 LOW FLAME 3 AUTOMATIC FLAME DETECTION ELECTRODE GAS ELECTRO VALVE UPSTREAM OR VALVES GROUP GAS ELECTRO VALVE DOWNSTREAM OR VALVES GROUP AUXILIARY FUSE FAN MOTOR LINE FUSES LINE FUSE UV FLAME DETECTOR MAINS SWITCH AUXILIARY LINE SWITCH AUXILIARY RELAY AUXILIARY RELAY FAN MOTOR CONTACTOR BURNER IN HIGH FLAME INDICATOR LIGHT CONTROL BOX OUTPUT CONTROLLER INDICATOR LIGHT FOR BURNER LOCK OUT BURNER IN LOW FLAME INDICATOR LIGHT INDICATOR LIGHT FOR OPENING OF ELECTRO VALVE EV1 INDICATOR LIGHT FOR OPENING OF ELECTRO VALVE EV2 INDICATOR LIGHT FOR PRESENCE OF GAS IN THE NETWORK INDICATOR LIGHT FOR BURNER STAND BY INDICATOR LIGHT FOR LEAKAGE OF VALVES INDICATOR LIGHT FOR FAN OVERLOAD TRIPPED IGNITION TRANSFORMER INDICATOR LIGHT FAN MOTOR COMBUSTION AIR PRESSURE SWITCH MAXIMUM PRESSURE GAS SWITCH OPTIONAL MINIMUM GAS PRESSURE SWITCH LOCK OUT RESET BUTTON TEMPERATURE PROBE TENSION SIGNAL CURRENT SIGNAL PRESSURE PROBE TEMPERATURE PROBE SERIES OF THERMOSTATS OR PRESSURE SWITCHES AIR DAMPER ACTUATOR IGNITION TRANSFORMER HIGH LOW THERMOSTAT PRESSURE SWITCHES IF FITTED REMOVE THE BRIDGE BETWEEN TERMINALS 6 AND 7 ON TERMINAL BOARD MA THERMOCOUPLE FAN MOTOR THERMA
26. FECTIVES OVERLOAD TRIPPED INTERVENTION AUXILIARIES FUSE INTERRUPTED o DEFECTIVE CONTROL BOX o o o DEFECTIVE ACTUATOR o o AIR PRESSURE SWITCH FAULT OR BAD SETTING MINIMUM GAS PRESSURE SWITCH DEFECTIVE OR GAS FILTER DIRTY IGNITION TRANSFORMER FAULT IGNITION ELECTRODES BAD POSITION BUTTERFLY VALVE BAD SETTING o DEFECTIVE GAS GOVERNOR GAS VALVE DEFECTIVE BAD CONNECTION OR DEFECTIVE HIGH LOW FLAME HERMOSTAT OR PRESSURE SWITCH ACTUATOR CAM WRONG SETTING UV PROBE DIRTY OR DEFECTIVE 6 Seasonal stop 1 turn the burner main switch to 0 position 2 disconnect the power mains 3 close the fuel valve of the supply line Burner disposal In case of disposal follow the instructions according to the laws in force in your country about the Disposal of materials To stop the burner in the seasonal stop proceed as follows GQOSZ L6 0W SVOINN UNIGAS M039175CD SPARE PARTS Desription Code RX90 RX91 CONTROL BOX 2020448 2020448 DETECTION ELECTRODE 2080106 2080107 IGNITION ELECTRODE 2080269 2080266 GAS FILTER Rp 2 2090119 2090119 2090112 6050108 NOTE it is recommended to mention burner ID number spare parts request form 38 UNIGAS M039175CD WIRING DIAGRAMS Complete key 21 018 CMF ER 2 1 2 IG IL 2 KM1 1 LAF SIEMENS LFL 1 3xx SI
27. Fig 8 the gas proving test mus be performed according to the procedure set by the laws in force ATTENTION it is recommended to mount filter and gas valves to avoid that extraneous material drops inside the valves during maintenance and cleaning operation of the filters both the filters outside the valves group and the ones built in the gas valves The procedures of installation fo the gas valves are showed in the next paragraphs according to the gas train used e threaded gas trains with Multibloc Dungs MBC SE 1200 or Siemens VGD20 e flanged gas trains with Multibloc Dungs MBC SE 1900 3100 5000 or Siemens VGD40 13 UNIGAS M039175CD Siemens VGD20 VGD40 gas valves with SKP2 pressure governor Mounting When mounting the VGD double gas valve two flanges are required as for VGD20 model the flanges are threaded to prevent cuttings from falling inside the valve first fit the flanges to the piping and then clean the associated parts install the valve the direction of gas flow must be in accordance with the direction of the arrow on the valve body ensure that the bolts on the flanges are properly tightened ensure that the connections with all components are tight make certain that the O rings and gaskets between the flanges and the double gas valve are fitted Connect the reference gas pipe TP in figure 8mm external size pipe supplied loose to the gas pressure nipples placed on the g
28. G CORRECTLY CON NECTED TO A HEAT GENERATOR E G BOILER HOT AIR GENERATOR FURNACE ETC ANY OTHER USE IS TO BE CONSI DERED IMPROPER AND THEREFORE DANGEROUS THE USER MUST GUARANTEE THE CORRECT FITTING OF THE APPLIANCE ENTRUSTING THE INSTALLATION OF IT TO QUALIFIED PERSONNEL AND HAVING THE FIRST COMMISSIONING OF IT CARRIED OUT BY A SERVICE CENTRE AUTHORI SED BY THE COMPANY MANUFACTURING THE BURNER A FUNDAMENTAL FACTOR IN THIS RESPECT IS THE ELECTRICAL CONNECTION TO THE GENERATOR S CONTROL AND SAFETY UNITS CONTROL THERMOSTAT SAFETY ETC WHICH GUARANTEES CORRECT AND SAFE FUNCTIONING OF THE BURNER THEREFORE ANY OPERATION OF THE APPLIANCE MUST BE PREVENTED WHICH DEPARTS FROM THE INSTALLATION OPERATIONS OR WHICH HAPPENS AFTER TOTAL OR PARTIAL TAMPERING WITH THESE E G DISCONNECTION EVEN PARTIAL OF THE ELECTRICAL LEADS OPENING THE GENERATOR DOOR DISMANTLING OF PART OF THE BURNER NEVER OPEN OR DISMANTLE ANY COMPONENT OF THE MACHINE OPERATE ONLY THE MAIN SWITCH WHICH THROUGH ITS EASY ACCESSIBILITY AND RAPIDITY OF OPERATION ALSO FUNCTIONS AS AN EMERGENCY SWITCH AND ON THE RESET BUTTON IN CASE OF A BURNER SHUT DOWN RESET THE CONTROL BOX BY MEANS OF THE RESET PUSHBUTTON IF A SECOND SHUT DOWN TAKES PLACE CALL THE TECHNICAL SERVICE WITHOUT TRYING TO RESET FURTHER WARNING DURING NORMAL OPERATION THE PARTS OF THE BURNER NEAREST TO THE GENERATOR COUPLING FLANGE CAN BECOME VERY HOT AVOID TOUCHING THEM SO AS NOT TO GET BURNT
29. L GAS PROVING SYSTEM OPTIONAL 1 Power supply 400V 50 Hz 3N a c 2 Don t reverse phase with neutral 3 Ensure burner is properly hearted 39 10 11 12 13 FRONTALE QUADRO FRONT CONTROL PANEL 11 FRONTALE FOB FRONTALE FQB hand 1 C m oa FRONTA FRONTA un ES VEROLINE PROGRESSIVA PR PROGRESSIVE VERSION SIEMENS LFL 1 3xx 20114 5 amp 182 oogoooo0 APPARECCH LFL2 LFL2 APPARECCH L r lt gt nm ex E RWF40 CIRCUITO 5 PRINTED CIRCUIT BOARD COD 6100533 Al TV KMI SERVOCOMANDO SERRANDA ARIA DAMPER ACTUATOR 50133 03 Y1 ALTA FIAMMA HIGH FLAME Y2 SOSTA E ACCENSIONE STAND BY AND IGNITION 3 BASSA FIAMMA GAS GAS LOW FLAME EVP2 1 EV2
30. LED res O O Burner in stand by LED J P Burner Modulator only on fully modulating bur ners CMF 5 a A be 31 UNIGAS M039175CD At least once a year carry out the maintenance operations listed below In the case of seasonal servicing it is recommended to carry out the maintenance at the end of each heating season in the case of continuous operation the maintenance is carried out every 6 months WARNING ALL OPERATIONS ON THE BURNER MUST BE CARRIED OUT WITH THE MAINS DISCONNECTED AND THE FUEL MANAUL CUTOFF VALVES CLOSED ATTENTION READ CAREFULLY THE WARNINGS CHAPTER AT THE BEGINNIG OF THIS MANUAL ROUTINE MAINTENANCE Clean and examine the gas filter cartridge and replace it if necesssary See next paragraph Remove and clean the combustion head see page 35 Examine and clean the ignition electrodes adjust and replace them if necessary see page 37 Examine and clean the detection electrode photoelement according to the burner models replace it if necessary see page 38 in case of doubt check the detection circuit after the burner start up See page 38 e Cleane and grease leverages and rotating parts ATTENTION when servicing if it was necessary to disassemble the gas train parts remember to execute the gas proving test once the gas train is reassembled according to the procedure imposed by the law in force
31. air pressure switch locks the control box if the air pressure is not the one requested If it happens unlock the burner by means of the control box unlock pushbutton placed on the burner control panel VR The gas pressure switches check the pressure to avoid the burner operate when the pressure value is not in the requested pressure range Calibration of air pressure switch To calibrate the air pressure switch proceed as follows e Remove the transparent plastic cap e Once air and gas setting have been accomplished startup the burner e During the pre purge phase o the operation turn slowly the adjusting ring nut VR in the clockwise direction as to increase the adju sting pressure until the burner lockout then read the value on the pressure switch scale and set it to a value reduced by 15 e Repeat the ignition cycle of the burner and check it runs properly e Hefit the transparent plastic cover on the pressure switch 28 UNIGAS M039175CD Calibration of low gas pressure switch As for the gas pressure switch calibration proceed as follows Be sure that the filter is clean Remove the transparent plastic cap While the burner is operating at the maximum output test the gas pressure on the pressure port of the minimum gas pressure switch Slowly close the manual cutoff valve placed upstream the pressure switch see gas train installation diagram until the detected pressure is reduced by 50 Pay attention
32. amper only happens towards the end of the post ventilation time and is prompted by an automatic signal from terminal 11 t13 Admissible post ignition time During this time the flame monitor circuit may still receive a flame signal without the apparatus blocking D A End of automatic programme At the end of t6 at the point where the programmer and the automatic contacts have reverted to the starter position the detection probe test restarts During an operational stop even an unscheduled flame signal lasting a few seconds can cause a block because during this period an NTC in the circuit acts as retarder This means that brief unscheduled influences can not cause a block gt Times t3 t2 and only apply only to safety devices in the series 01 Specifications Mains voltage 220V 15 240V 10 Frequency 50Hz 6 60HZ 6 Absorbed capacity 3 5 VA Built in fuse T6 3 250E slow action DIN41571 No 451915070 External fuse max 16A Interference N VDE0875 Flow permitted at terminal 1 5A DIN 0660 AC3 Flow permitted at control terminals 4A DIN 0660 AC3 Flow at monitor contacts input at terminals 4 8 5 input at terminals 4 amp 11 input at terminals 4 amp 14 1A 250V 1A 250V function of the load at terminals 16 and 19 min 1A 250V Emplacement Any Protection IP40 Permitted ambient temp 20 60 C Min temperature trans storage 50 C Weight apparatus approx 1 000g base approx 165g lonisatio
33. art it up again 17 Once the pre purge time comes to end drive the burner to the high flame stage by the TAB thermosta and check the combustion values 18 drive the burner to low flame if necessary adjust the low flame size ouput by inserting a screwdriver on the slot F to move the BF cam BF Pa 19 The low flame position must never match the ignition position that is why cam must be set 20 30 more than the ignition posi tion see ID index on previous pictures 20 Now adjust the pressure switches see next parahraphs Fully modulating burners To adjust the fully modulating burners use the CMF switch on the burner control panel see next picture instead of the TAB thermo stat as described on the previous paragraphs about the progressive burners Go on adjusting the burner as described before paying attention to use the CMF switch intead of TAB The CMF position sets the oprating stages to drive the burner to the high flame stage set CMF 1 to drive it to the low flame stage set CMF 2 To move the adjusting cam set 1 or 2 and then CMF 0 0 stop at the current position 21 high flame operation CMF 2 low flame operation automatic operation CMF Calibration of air and gas pressure switches Fig 29 2 5 The
34. as pipe downstream the gas valves gas pressure must be measured at a distance that must be at least 5 times the pipe size Leave the blowhole free SA in figure Should the spring fitted not permit satisfactory regulation ask one of our service centres for a suitable replacement Caution the SKP2 diaphragm must be vertical see Fig 11 A WARNING removing the four screws BS causes the device to be unserviceable SIEMENS VGD MOUNTING POSITIONS Fig 13 14 UNIGAS M039175CD MULTIBLOC DUNGS MBC300 700 1200SE Threaded valves group Mounting 1 Mount flange onto tube lines Use appropriate sealing agent see Fig 14 2 Insert MBC SE Note position of O rings see Fig 15 3 Tighten screws 4 After installation perform leakage and functional test 5 Disassembly in reverse order Fig 14 MOUNTING OPTION POSITIONS MULTIBLOCDUNGS MBC1900 3100 5000SE Flanged valves group Mounting 1 Insert setscrews A 2 Insert seals 3 Insert setscrews B 4 Tighten setscrews A B Ensure correct seating of the seal 6 After installation perform leakage and functional test 7 Disassembly in reverse order Mounting positions OPTION min 5 x DN 10 pulse lines Pressure adjusting range The pressure adjusting range downstream the gas valves group
35. cribed on page 21 e Then adjust the combustion values corresponding to the points between maximum and minimum set the shape of the adjusting cam foil The adjusting cam sets the air gas ratio in those points regulating the opening closing of the throttle gas valve Set now the low flame output acting on the low flame microswitch of the actuator in order to avoid the low flame output increasing too much or that the flues temperature gets too low to cause condensation in the chimney Adjustment procedure To change the burner setting during the testing in the plant follow the next procedure On the DUNGS MBC SE gas valves group set the pressure regulator to 1 3 of its stroke using a 2 5 allen key Innensechskantschlissel No 2 5 Allen key no 2 5 Cl de six pans m le 2 5 Chiave esagonale cava nr 2 5 Pressure setting Now adjust the burner according to the actuator model provided 23 UNIGAS M039175CD Air and Gas Flow Rate Settings by means of Berger STM30 Siemens SQM40 actuator Actuator cams High flame 1 Stand by and Ignition Low flame Berger STM30 eer Siemens SQM4O 1 Check the fan motor rotation and act directly on the related contactor see next picture 2 Before starting the burner up drive the high flame actuator microswitch matching the low flame one in order to let the burner ope rates at the lowest output to safely achieve the high flame stage 3 Turn the bur
36. cting on the pressure stabiliser of the valves group adjust the gas flow rate in the high flame stage as to meet the values requested by the boiler utilisation 26 UNIGAS M039175CD Siemens VGD valves group remove T and on the VR adjusting screw to increase or decrease the pressure and conse quently the gas rate screwind VR the rate increases unscrewing it decreases see next figure Dungs MBC SE valves group act on its pressure governor to increase or decrease the pressure and consequently the gas rate Innensechskantschl ssel No 2 5 Allen key no 2 5 Cl de six pans m le no 2 5 Chiave esagonale cava nr 2 5 Siemens VGD Dungs MBC SE 9 adjust the air flow rate in the high flame stage loose the RA nut and screw VRA as to get the desired air flow rate moving the rod TR towards the air damper shaft the air damper opens and consequently the air flow rate increases moving it far from the shaft the air damper closes and the air flow rate decreases Note once the procedure is perfomed be sure that the blocking nut RA is fasten Do not change the position of the air damper rods TR RA VRA 10 Only if necessary change the combusiton head position the burner is factory set according to its combustion head model The burner is factory set with the head in its all ahead position as for the minimum output To operate at a higher power loosen the VB screw and slightly move the co
37. d to the appliance so that the flame is generated inside the appliance firebox Before the burner is started and thereafter at least once a year have qualified personnel perform the following operations a set the burner fuel flow rate depending on the heat input of the appliance b setthe flow rate of the combustion supporting air to obtain a combu stion efficiency level at least equal to the lower level required by the regulations in force check the unit operation for proper combustion to avoid any harmful or polluting unburnt gases in excess of the limits permitted by the regulations in force d make sure that control and safety devices are operating properly e sure that exhaust ducts intended to discharge the products of combustion are operating properly on completion of setting and adjustment operations make sure all mechanical locking devices of controls have been duly tightened 0 make sure that a copy of the burner use and maintenance instruc tions is available in the boiler room Incase of a burner shut down reser the control box by means of the RESET pushbutton If a second shut down takes place call the Technical Service without trying to RESET further The unit shall be operated and serviced by qualified personnel only in compliance with the regulations in force 3 GENERAL INSTRUCTIONS DEPENDING ON FUEL USED 3a ELECTRICAL CONNECTION For safety reasons the unit must be eff
38. damper servo motor at terminal 8 1 Block due to absence of flame signal at the end of the 1st safety period From this moment onwards any absence of a flame signal will cause a block 2 Blockdue to absence of flame signal at the end of the 2nd safety period flame signal of main burner i Blockdue to absence of flame signal or air pressure during operation Where a block stoppage occurs at any moment between switch on and pre ignition without registering any symbol the cause is normally an unscheduled flame signal La 7 4 a b Start up programme b b For time variants move the programmer on to the automatic stop after the burner starts up b position of the programmer during normal burner operation b b aPost ventilation programme after a regulation stop At the start up position a the programmer stops automatically Safety time duration for mono tube burners Safety time duration for twin tube burners The apparatus can be reset immediately after a block After resetting and after the elimination of any problem causing the stoppage or after a power failure the programmer returns to its start up position In this event only the terminals 7 9 10 and 11 are live in accordance with the monitoring programme Only after this the device programs a new startup Operation The wiring system and also the control system of the programmer P have already been given in this manual The response sig
39. e burner with gas train gasket to be inserted between the burner and the boiler envelope containing this manual To get rid of the burner s packing follow the procedures laid down by current laws on disposal of materials Handling the burner ATTENTION The Ihandling operations must be carried out by specialised and trained personnel If these opera tions are not carried out correctly the residual risk for the burner to overturn and fall down still persists To move the burner use means suitable to support its weight see paragraph Technical specifications The unpacked burner must be lifted and moved only by means of a fork lift truck The burner is mounted on a stirrup provided for handling the burner by means of a fork lift truck the forks must be inserted into the A anb B ways Remove the stirrup only once the burner is installed to the boiler 10 UNIGAS M039175CD Fitting the burner to the boiler To install the burner into the boiler proceed as follows make a hole on the closing door of the combustion chamber as described on paragraph Overall dimensions place the burner to the boiler lift it up and handle it according to the procedure described on paragraph Handling the burner place the 4 stud bolts 5 on boiler s door according to the burner s drilling template described on paragraph Overall dimensions fasten the 4 stud bolts place the gasket on the burner f
40. ean directives Directive 2006 95 EC on low voltage Directive 2004 108 EC on electromagnetic compatibility Harmonised standards CEI EN 60335 1 Household and similar electrical appliances Safety Part 1 General requirements EN 50165 Electrical equipment of non electric appliances for house hold and similar purposes Safety requirements National standards UNI 7824 Monobloc nebulizer burners for liquid fuels Characteristics and test methods Heavy oil burners European directives Directive 2006 95 EC on low voltage Directive 2004 108 EC on electromagnetic compatibility Harmonised standards CEI EN 60335 1 Household and similar electrical appliances SafetyPart 1 General requirements EN 50165 Electrical equipment of non electric appliances for household and similar purposes Safety requirements National standards UNI 7824 Monobloc nebulizer burners for liquid fuels Characteristics and test methods Gas Light oil burners European directives Directive 2009 142 EC Gas Appliances Directive 2006 95 EC on low voltage Directive 2004 108 EC on electromagnetic compatibility Harmonised standards UNI EN 676 Gas Burners CEI EN 60335 1 Household and similar electrical appliances Safety Part 1 General requirements EN 50165 Electrical equipment of non electric appliances for household and similar purposes Safety requirements National standards UNI 7824 Monobloc nebulizer burners for liquid
41. el 2 input for excitation of flame relay during flame detector test 3 circuit contact XIV and during safety time contact IV Do not press EK for more than 10 seconds Programmer diagram t1 t2 t2 t3 t3 t4 t4 t5 t6 pre ventilation time safety time 1st safety time pre ignition time pre ignition time interval for creating current between terminals 18 and 19 interval for creating current between terminals 17 and 19 interval for creating current between terminals 19 and 20 post ventilation time a m b E on er a es NS A LN 8 IV V a VI VII ao Wi pop 506 X EE _ XI 5 S POTIS DN xil 8 ERE een XIV E names a XV b EMI mE TTD S Positions of lock out indication 111 11 112 ERE a DCN _ pL OESA O 4 t7 t8 9 110 111 112 113 116 120 interval between startup consent and current created terminal 7 duration of start up 2nd safety time interval before air pressure monitoring begins damper opening travel time damper closure travel time permissible post combustion time initial delay of damper OPEN response interval before programmer automatically stops These times are valid with the use of a series 01 safety device for moni toring burners with intermittent pi
42. head to its MAX position see paragraph Adjusting the combustion head the minimum output point is rea ched setting the combustion head to its MIN position During the first ignition the combustion head is set in order to find a compromise between the burner output and the generator specifications that is why the minimum output may be different from the Per formance curve minimum Pressure in the Network gas flow rate curves RX90 RX91 50 100 _ 2 50 T ones 7 30 60 DN100 7 2 3 22 10 zg 20 2 22 9 0 0 20 40 60 80 100 120 140 160 180 50 100 150 200 250 Stm h Stm h Caution the gas rate value is quoted on the x axis the related network pressure is quoted on the y axis pressure value in the combustion chamber is not included To know the minimum pressure at the gas train inlet necessary to get the reque sted gas rate add the pressure value in the combustion chamber to the value read on the y axis UNIGAS M039175CD MOUNTING AND CONNECTING THE BURNER Packing The burners are despatched in wooden crates whose dimensions are 1730mm x 1280mm x 1020mm L x P x H Packing cases of this type are affected by humidity and are not suitable for stacking The following are placed in each packing cas
43. iciently earthed and installed as required by current safety regulations is vital that all saftey requirements are met In case of any doubt ask for an accurate inspection of electrics by qualified personnel since the manufacturer cannot be held liable for damages that may be caused by failure to correctly earth the equipment e Qualified personnel must inspect the system to make sure that it is adequate to take the maximum power used by the equipment shown on the equipment rating plate In particular make sure that the system cable cross section is adequate for the power absorbed by the unit No adaptors multiple outlet sockets and or extension cables are per mitted to connect the unit to the electric mains An omnipolar switch shall be provided for connection to mains as required by the current safety regulations The use of any power operated component implies observance of a few basic rules for example do not touch the unit with wet or damp parts of the body and or with bare feet do not pull electric cables do not leave the equipment exposed to weather rain sun etc unless expressly required to do so do not allow children or inexperienced persons to use equipment The unit input cable shall not be replaced by the user In case of damage to the cable switch off the unit and contact qualified personnel to replace When the unit is out of use for some time the electric switch supplying all the
44. in the gas valve group proceed as follows 1 2 3 4 LEE Carefully twist the protection cap 1 and the O ring 2 remove the set value spring 3 from housing 4 Replace spring 3 Carefully insert the new set value spring Pay attention to mount properly First insert the spring part with smaller diameter in the housing Place O ring 2 in protective cap 1 Screw in the protective cap with the O ring in it Stick the adhesive label for spring identification on the type plate mE pm DUNGS MBC SE SKP Siemens actuator 33 UNIGAS M039175CD Removing combustion head Remove the cover C remove the electrodes cables unscrew the 3 screws V which hold in position the gas manifold G and pull out the complete group as shown in picture Note to replace the combustion head reverse the procedure described above having care to place correctly the O ring OR between burner and gas manifold Key VRT Head adjusting screw AR Threaded rod V Fixing screw G Gas manifold OR ring C Cover 34 UNIGAS M039175CD Electrodes Adjustment Important Note Check the ignition and detection electrodes after removing adjusting the combustion head ATTENTION avoid the ignition and detection electrodes to contact metallic parts blast tube head etc otherwise the boi ler s operation would be compromised Check the electrodes position after a
45. lange install the burner into the boiler fix the burner to the stud bolts by means of the fixing nuts according to the next picture After fitting the burner to the boiler ensure that the gap between the blast tube and the refractory lining is sealed with appropriate insulating material ceramic fibre cord or refractory cement N 0 Keys 1 Burner 2 Fixing nut 3 Washer 4 Sealing gasket 5 Stud bolt 7 Blasttube Matching the burner to the boiler The burners described in this manual have been tested with combustion chambers that comply with EN676 regulation and whose dimensions are described in the diagram In case the burner must be coupled with boilers with a combustion chamber smaller in dia meter or shorter than those described in the diagram please contact the supplier to verify that a correct matching is possible with res pect of the application involved To correctly match the burner to the boiler verify the necessary input and the pressure in combustion chamber are included in the burner performance curve otherwise the choice of the burner must be revised consulting the burner manu facturer To choose the blast tube lenght follow the instructions of the boiler manufacturer In absence of these consider the following e Cast iron boilers three pass flue boilers with the first pass in the rear part the blast tube must protrude no more than 100 mm into the combustion chamber e Pressurised b
46. lot lighter Ee a a ME pa a a ee all ILLI LL IL LLL 7451 12 0496 Control output 6 D onterminal TTT TTC Mii Eo 7451901 0196 LFL umm p nim ain WP mmm imn Pe m mmm ee CIB C I B UNIGAS S p A Via L Galvani 9 35011 Campodarsego PD ITALY Tel 39 049 9200944 Fax 39 049 9200945 9201 269 web site www cibunigas it e mail cibunigas cibunigas it Note Specifications and and data subject to change Errors and omissions excepted
47. mbustion head backwards turning clockwise the knob VRT Fasten VB screw when the adjustment is accomplished all ahead position VB VRT all backwards head position Attention if it is necessary to change the head position repeat the air and gas adjustments described above 11 the air and gas rate are now adjusted at the maximum output go on with the point to point adjustment on the SV1 adjusting cam as to reach the minimum output point gradually move the adjusting cam in order to adjust each of the V1 screws as to set the cam foil shape as described on the next steps 12 to change the SV position set the actuator on the manual mode MAN turn the adjusting cam SV and set again the actuator to the AUTO mode to lock the adjusting cam 13 acton the V screw that mathces the bearings referring to the adjusting cam position 14 to adjust the next screw set again the actuator mode to MAN turn the adjusting cam and set the actuator to AUTO mode to lock the adjusting cam on the next screw adjust it and go on this way to adjust all the screws in order to set the cam foil shape accor ding to the combustion values read 15 Once the cam foil shape is defined reconnect the TAB thermostat reconnecting the wire to the terminal no 6 or setting the RWF40 burner modulator to AUTO or the CMF switch to 3 only for fully modulating burner 27 UNIGAS M039175CD Gas throttle valve closed 16 Turn the burner off then st
48. minal 10 to the flame ignition position which is governed by the auxiliary contact M During this period the programmer stops until terminal 8 is again activate dthrough contact M After a few seconds the little programmer motor is directly fed by the active part of the apparatus After this point terminal 8 plays no further part in the burner ignition pro cess Mono tube burner 13 Pre ignition time waiting the response from the fuel valve termi nal 18 t2 Safety time start up flame strenght at the end of the safety time a flame signal should appear at terminal 22 of the amplifier and it should stay on until a regulation stop if this does not happen the mechanism will block t4 Interval at the end of t4 terminal 19 is live t5 Interval At the end of t5 terminal 20 is live At the same time the monitor outlets from 9 and 11 and terminal 8 into the active part of the apparatus are kept galvanically separatedso as to protect the monitor itself from recovery voltage through the capacity regulator circuit Twin tube burners t3 Preignition time until the all clear to the pilot burner valve at terminal 17 t2 First safety time pilot flame strenght at the end of the safety time a flame signal should appear at terminal 22 of the amplifier and it should stay on until a regulation stop if it does not the apparatus will block t4 Interval until the consent to the fuel valve at terminal 19 for the first flame of
49. n monitor voltage in detector electrode normal working 330V 10 test 380V 10 short circuit current max 0 5 mA lonisation current min request 6 pA max permitted length for connecting cables normal cable laid separately 80m armoured cable high frequency protection at terminal 22 140m UV monitor Voltage in UV detector normal working 330V 10 test 380V 10 Detector current min request 70uA Max detector current normal working 630 uA test 1300 Max length of connecting cable normal cable laid separately 100m armoured cable high frequency protected at terminal 22 200m Weight QRA2 60 g QRA10 450 g Connect up in parallel to the measuring device a condenser 1001 10 25V The wire connecting up the detector electrode should not be in the same sleeve as the other conductor wires Ignition spark monitor with QRE1 series 02 detector Minimum detector current Operating times t7 initial delay for ventilator G2 2 t16 initial delay of air damper OPEN consent 4 111 opening time for damper t10 initial delay for air pressure monitor8 t1 pre ventilation time with damper open36 t12 travel time for air damper to MIN positionany t3 t3 pre ignition time t3 4 t3 t2 12 safety time 1st safety time for burners with intermittent pilot lighter t2 2 t2 14 14 interval between start of 12 and response to valve at terminal 19 14 10 14 19 2nd safety time for burners with i
50. nals required for the active parts and the flame monitor circuit are shown by a hatching In the absence of these response signals the mechanism interrupts the start up programme the exact time of the interruption can be identified from the visual indicator and will cause a block if the safety code requires it A consent to start up by means of the thermostat or pressostat R A B start up program B C normal burner operation C regulation stop caused by C D programmer returns to start up position A During the regulation stop only terminals 11 and 12 are live and the dam per through the limit contact Z of its servo motor is in the CLOSED posi tion The flame detector circuit F is activated terminals 22 and 23 or 23 4 for the detector test and the paracitic light test Where the burners do not have dampers or have an independent 00 damper control mechanism there must be a bridge between terminals 6 and 8 otherwise the mechanism will not start up the burner For a burner to start up the following conditions must be met e Mechanism not blocked reset e Damper closed Limit contact switchZ must be in the CLOSED position and allow current to flow between terminals 11 and 8 e contacts checking that the fuel valve bv is closed or other con tacts with similar functions must be closed between terminal 12 and the air pressostat LP e contact for the air pressostat LP must be in the off position LP test so as t
51. ner on by means of its main switch A see next picture if the burner locks LED B on in the control panel press the RESET button C on the control panel see chapter OPERATION 4 Startthe burner up by means of the thermostat series and wait until the pre purge time comes to an end and the burner starts up EV2 QY A I ke Olol o0 5 zr Mis kot Ae 5 drive the burner to high flame stage by means fo the thermostat TAB high low flame thermostat see Wiring diagrams as far as fully modulating burners see related paragraph 6 Then move progressively the microswitch to higher values until it reaches the high flame position always check the combustion values and eventually adjusting the gas by means of the valves group stabiliser 7 adjusting air and gas flow rates check continuosly the flue gas analisys as to avoid combustion with little air dose the air according to the gas flow rate change following the steps quoted below 8 acting on the pressure stabiliser of the valves group adjust the gas flow rate in the high flame stage as to meet the values requested by the boiler utilisation Siemens VGD valves group remove cap T and act on the VR adjusting screw to increase or decrease the pressu
52. ntermittent pilot lighter 2 t5 interval between end of t4 and response at terminal 20 10 t20 interval before programmer cuts out after start up duration of start up 60 t6 post ventilation time G2 only 12 t13 permitted post ignition time 12 t16 initial delay from opening consent of the air damper t20 interval until the automatic shut off of the programming mechanism after the burner start Key A limit contact switch for damper OPEN position block remote signal AR main relay working network with contacts ar AS Monitor fuse BR block relay with br contacts BV fuel valve EK reset button FE detector electrode of ionisation circuit FR flame relay with fr contacts G ventilator motor or burner motor GP gas pressure switch H main interruptor switch block stoppage LED LK air damper LP A air pressostat LR safety regulator M auxiliary contact switch for damper MIN position QRA UV detector QRE ignition spark detector H thermostat or pressostat S fuse SA damper servo motor SM synchronous programmer motor V flame signal amplifier V in case of servo motor auxiliary contact for response to fuel valve with regard of damper position W safety pressostat or thermostat Z ignition transformer Z in case of servomotor end of limit contact switch for damper CLOSED position pilot burner fuel valve for mono tube burners PE for twin tube burners 1 input for raising QRA detector voltage to test lev
53. ny intervention on the combustion head The gap between ignition electrode E and grounded electrode M must be 4mm detection electrode Fig 31 Replacing the electrodes the boiler s operation would be compromised Check the electrodes position after any intervention on the combustion ATTENTION avoid the ignition and detection electrodes to contact metallic parts blast tube head etc otherwise head To replace the electrodes proceed as follows remove the burner cover C disconnect the electrodes cables emove the combustion head referring to paragraph Removing the combustion head unscrew VE screws that fasten the electrodes see picture remove the electrodes and replace them referring to the quotes in the previous paragraph reconnect the electrodes calbes replace the combustion head replace the burner cover 35 UNIGAS M039175CD Checking the detection current for models without printed circuti board Control box Minimum detection signal To check the detection signal follow the scheme in Fig 32 or Siemens LFL1 3 6UA with electrode Fig 33 If the signal is less than the value indicated check the position of the detection electrode or detector the electrical contacts and if necessary replace the electrode or the detector TERMINAL BOARD MC TERMINAL BOARD MC 2 rs UA ae
54. o feed terminal 4 e The gas pressostat contacts GP and the safety thermostat and pres sostat contacts W must also be closed Start up program A Start up R closes the start up control ring between terminals 4 and 5 The programmer starts up At the same time the ventilator motor is fed through terminal 6 only for pre ventilation and after t7 the ventilator motor or the combustion gas exhaust fan is fed through terminal 7 pre ventilation and post ventilation At the end of t16 the command opening the damper passes through ter minal 9 during the damper opening time the programmer does not move since terminal 8 through which the programmer is fed is dead Only once the damper is fully open and the limit contact switch A has switched on feeding terminal 8 does the programme proceed t1 Pre ventilation time with damper fully open nominal air flow Shortly after the beginning of the pre ventilation time the air pressostat should switch off the current between terminals 4 and 13 otherwisethe apparatus would block air pressure monitor At the same time the terminal 14 should be live since current feeding the ignition transformer and the fuel valves passes through this circuit During pre ventilation time the flame detector circuit is checked and in the event of an operational defect the monitor brings about a block At the end of the pre ventilation time the monitor automatically moves the damper servo motor through ter
55. o reset the appliance by pressing the pushbutton LB Actuator The actuator provided can be either Berger STM30 Siemens SQMAO see page 25 or Siemens SQL33 see page 27 22 UNIGAS M039175CD Adjusting air and gas flow rates ATTENTION before starting the burner up be sure that the manual cutoff valves are open and check that the pres sure upstream the gas train complies the value quoted on paragraph Technical specifications Be sure that the mains switch is closed ATTENTION During commissioning operations do not let the burner operate with insufficient air flow danger of formation of carbon monoxide if this should happen make the gas decrease slowly until the normal combustion values are achieved WARNING NEVER LOOSE THE SEALED SCREWS OTHERWISE THE DEVICE WARRANTY WILL BE IMMEDIA TELY INVALIDATE IMPORTANT the combustion air excess must be adjusted according to the suggested values in the following chart Recommended combustion parameters Recommended Recommended Adjustments brief description Adjust the air and gas flow rates at the maximum output high flame first by means of the air damper and the adjusting cam respec tively Check that the combustion parameters are in the suggested limits Check the flow rate measuring it on the counter or if it was not possible verifying the combustion head pressure by means of a dif ferential pressure gauge as des
56. oilers with flame reversal in this case the blast tube must penetrate at least 50 100 mm into combustion chamber in respect to the tube bundle plate The length of the blast tubes does not always allow this requirement to be met and thus it may be necessary to use a suitably sized spacer to move the burner backwards or to design a blast tube tha suites the utilisation please contact the manifacturer Key a Heat output in kW b Length of the flame tube in meters Flame tube firing intensity in MW m d Combustion chamber diameter m Fig 7 Firing intensity diameter and lenght of the test flame tube as a function of the heat input in kW 2 0 T ITUR b 0 1 42 26 40 70100 190 480 1200 2450 Fig 7 11 UNIGAS M039175CD Gas train connections The diagrams show the components of the gas trai included in the delivery and which must be fitted by the installer The diagrams are in compliance with the current laws ATTENTION BEFORE EXECUTING THE CONNECTIONS TO THE GAS PIPE NETWORK BE SURE THAT THE MANUAL A N CUTOFF VALVES ARE CLOSED Gas train 1 Gas train with valves group VGD 20 40 with built in gas pressure governor VPS504 gas proving system MANUFACTURER INSTALLER Gas train 2 Rp2 Gas train with valves group MBC 1200SE 2 valves gas filter pressure governor VPS504 gas proving system MANUFACTURER 1 INSTALLER
57. p MEET eae Fig 32 Detection by electrode Fig 33 Detection by photocell QRA Check of the detection current with printed circuit Fig 34 To check the detection signal remove the bridge on TEST ER TEST UV and connect a micro ammeter when Fig 34 If the signal is less than the value indicated check the position of the ER detection electrode or detector the electrical contacts one terminal for the electrode two FC terminals for the UV probe see pictureon the side and if necessary replace the electrode or the UV detector Control box Minimum detection signal Siemens LFL1 3 GA with electrode LL Lx BE UY Siemens LFL1 3 with UV detector HA pA electrode UV detector 36 LE TROUBLESHOOTING TROUBLE ii TT a c 2 B E QOJ lt Q O gt a Z0 m lt T z 5 CAUSE T gt n Eit O T Z O fr 9 O Z ZO 0 2 lt lt ib z z n z LL Zo N eh lt lt E E EO O gt or 2 m i D zfs gt gt 2 DZ Zu 2 Zq Q lt Z ud 242 m um TO usu da 2 ai TO O2 OD E gt Q3 O QAO eo ep FAO HO MAIN SWITCH OPEN LACK OF GAS MAXIMUM GAS PRESSURE SWITCH DEFECTIVE HERMOSTATS PRESSURE SWITCHES DE
58. power driven components in the system i e pumps burner etc should be switched off 3b FIRING WITH GAS LIGHT OR OTHER FUELS GENERAL The burner shall be installed by qualified personnel and com pliance with regulations and provisions in force wrong installation can cause injuries to people and animals or damage to property for which the manufacturer cannot be held liable Before installation it is recommended that all the fuel supply system pipes be carefully cleaned inside to remove foreign matter that might impair the burner operation Before the burner is commissioned qualified personnel should ins pect the following a thefuel supply system for proper sealing b the fuel flow rate to make sure that it has been set based on the firing rate required of the burner the burner firing system to make sure that it is supplied for the desi gned fuel type d the fuel supply pressure to make sure that it is included in the range shown on the rating plate e thefuel supply system to make sure that the system dimensions are adequate to the burner firing rate and that the system is equipped with all the safety and control devices required by the regulations in force When the burner is to remain idle for some time the fuel supply tap or taps should be closed SPECIAL INSTRUCTIONS FOR USING GAS Have qualified personnel inspect the installation to ensure that a the gas delivery line and train
59. r which it is meant Any other use shall be considered as improper and there fore dangerous The manufacturer shall not be held liable by agreement or otherwise for damages resulting from improper installation use and failure to comply with the instructions supplied by the manufacturer 2 SPECIAL INSTRUCTIONS FOR BURNERS The burner should be installed in a suitable room with ventilation openings complying with the requirements of the regulations in force and sufficient for good combustion Only burners designed according to the regulations in force should be used This burner should be employed exclusively for the use for which it was designed Before connecting the burner make sure that the unit rating is the same as delivery mains electricity gas oil or other fuel Observe caution with hot burner components These are usually near to the flame and the fuel pre heating system they become hot during the unit operation and will remain hot for some time after the burner has stopped When the decision is made to discontinue the use of the burner the user shall have qualified personnel carry out the following operations a Remove the power supply by disconnecting the power cord from the mains b Disconnect the fuel supply by means of the hand operated shut off valve and remove the control handwheels from their spindles Special warnings Make sure that the burner has on installation been firmly secure
60. re and conse quently the gas rate screwind VR the rate increases unscrewing it decreases see next figure Dungs MBC SE valves group act on its pressure governor to increase or decrease the pressure and consequently the gas rate 24 10 UNIGAS M039175CD Innense chskantschl ssel No 2 5 Allen key no 2 5 Cl de six pans m le 2 5 Siemens VGD Chiave esagonale cava nr 2 5 Dungs MBC SE To adjust the air flow rate in the high flame stage loose the RA nut and screw VRA as to get the desired air flow rate moving the rod TR towards the air damper shaft the air damper opens and consequently the air flow rate increases moving it far from the shaft the air damper closes and the air flow rate decreases Note once the procedure is perfomed be sure that the blocking nut RA is fasten Do not change the position of the air damper rods VRA Only if necessary change the combusiton head position the burner is factory set according to its combustion head model LX90 91 510 The burner is factory set with the head in its all ahead position as for the minimum output To operate at a higher power loosen the VB screw and slightly move the combustion head backwards turning clockwise the knob VRT Fasten VB screw when the adjustment is accomplished all ahead position VB VRT all backwards head position Attention if it is necessary to change the head
61. reach of chil dren as they may prove harmful Before any cleaning or servicing operation disconnect the unit from the mains by turning the master switch OFF and or through the cut out devices that are provided e Make sure that inlet or exhaust grilles are unobstructed Incase of breakdown and or defective unit operation disconnect the unit Make no attempt to repair the unit or take any direct action Contact qualified personnel only Units shall be repaired exclusively by a servicing centre duly authorised by the manufacturer with original spare parts Failure to comply with the above instructions is likely to impair the unit s safety To ensure equipment efficiency and proper operation it is essential that maintenance operations are performed by qualified personnel at regular intervals following the manufacturer s instructions When a decision is made to discontinue the use of the equipment those parts likely to constitute sources of danger shall be made har mless Incase the equipment is to be sold or transferred to another user or in case the original user should move and leave the unit behind make sure that these instructions accompany the equipment at all times so that they can be consulted by the new owner and or the installer Forall the units that have been modified or have options fitted then original accessory equipment only shall be used This unit shall be employed exclusively for the use fo
62. related contactor see next picture 2 Turn the burner on by means of its main switch A if the burner locks LED B on in the control panel press the RESET button C on the control panel see chapter OPERATION on page 31 3 Start the burner up by means of the thermostat series and wait until the pre purge time comes to an end and that the burner starts up 4 the burner starts up with the actuator on the ignition position set it to the MAN manual mode by the MAN AUTO selector ignition position read on the air damper index ID1 see picture on pag 31 5 disconnect the TAB thermostat removing the wire from the terminal 6 or by setting MAN on the RWF40 modulatore or by set ting by means of the switch only for fully modulating burners 6 manually drive the adjusting cam SV to the high flame position and set the actuator to the AUTO mode by the related switch see picture to lock the adjusting cam SQL330 actuator cams A red cam locking lever for high flame 5 green cam locking lever for stand by and ignition BF Low flame F plastic cam 7 adjusting air and gas flow rates check continuosly the flue gas analisys as to avoid combustion with little air dose the air according to the gas flow rate change following the steps below 8 a
63. the main burner t9 2nd safety time at the end of the second safety time the main bur ner should be lit by means of the pilot At the end of this period terminal 17 is dead and therefore the pilot burner will be out t5 Interval at the end of t5 terminal 20 is live At the same time the monitor outlets from 9 to 11 and the terminal 8at the input of the active part of the apparatus are galvanically separated so as to protect the appa ratus itself from recovery voltage through the strenght regulator circuit When the strenght regulator LR at terminal 20 gives the consent the start up programme for the apparatus comes to an end Depending on time variants the programmer stops either immediately or at the end of a set time without effecting the position of the contacts B Operational position of the burner B C Burner operation production of heat While the burner is working the strnght regulator controls the damper according to the demand for heat by means of the positioning at nominal load of the auxiliary contact V of the damper servocontrol C Regulation stop for operation of When there is a regulation stop the fuel valves immediately close At the same time the programmer starts to programme 16 Post ventilation time post ventilation with the ventilator ter minal 7 Shortly after beginning of the post ventilation time terminal 10 becomes live and moves the damper to the MIN position The full clo sure of the d
64. urner is suitable for the boiler to which it must be installled the following parameters are needed e furnace input in kW or kcal h kW kcal h 860 e backpressure data are available on the boiler s ID plate or in the user s manual Example Furnace input 600kW Backpressure 4mbar In the Performance curve diagram Fig 4 draw a vertical line matching the furnace input value and an horizontal line matching the backpressure value The burner is suitable if the intersection point A is inside the performance curve di lavoro bruciatori combustione mbar O N o A O Q Contropressione in camera di 200 300 400 500 600 700 800 900 Potenza kW Fig 4 The values are referred to standard environmental conditions 1013mbar 15 C Checking the proper gas train size To check the proper gas train size it is necessary to know the available gas pressure value upstream the burner s gas valve Then subtract the backpressure The result is called pgas Draw a vertical line matching the furnace input value 600kW in the example quoted on the x axis as far as intercepitng the network pressure curve according to the installed gas train DN65 in the example From the interception point draw an horizontal line as far as matching on the y axis the value of pressure necessary to get the reque sted furnace input This value must be lower or equal to

RX90 RX91 - Arzatoare CIB Unigas

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