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Summary of Contents for Unigas LG70
- Page 1 LG/NG70 LGX/NGX70 LG/NG90 Idea Series Gas burners MANUAL OF INSTALLATION - USE - MAINTENANCE BURNERS - BRUCIATORI - BRULERS - BRENNER - QUEMADORES - ГОРЕЛКИ M039135CG Rev. 6.2 07/2020...
- Page 2 DANGERS, WARNINGS AND NOTES OF CAUTION 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 PRODUCT INSTALLATION AND MAINTENANCE.
- Page 3 3b) FIRING WITH GAS, LIGHT OIL OR OTHER FUELS DIRECTIVES AND STANDARDS Gas burners GENERAL European directives The burner shall be installed by qualified personnel and in compliance -Regulation 2016/426/UE (appliances burning gaseous fuels) with regulations and provisions in force; wrong installation can cause -2014/35/UE (Low Tension Directive) injuries to people and animals, or damage to property, for which the -2014/30/UE (Electromagnetic compatibility Directive)
- Page 4 Burner data plate Type Gas - Light oil burners For the following information, please refer to Model Year European Directives the data plate: S.Number -Regulation 2016/426/UE (appliances burning gaseous fuels) burner type and burner model: must be Output Oil Flow -2014/35/UE (Low Tension Directive) reported in any communication with the Fuel...
- Page 5 PART I - INSTALLATION Burner model identification Burners are identified by burner type and model. Burner model identification is described as follows. TypeNG90 Model NG - Natural gas burner LG - L.P.G. burner (1) BURNER TYPE LGX - Natural gas Low NOx burners NGX - Natural gas Low NOx burners (2) FUEL M - Natural gas...
- Page 6 BURNERS LG70 L-.TN...10 LG70 L-.TN...15 LG90 L-.TN...10 LG90 L-.TN...15 30 - 70 40 - 85 Output min. - max. kW L.P.G. L.P.G. L.P.G. L.P.G. Fuel Category 3B/P 1,2 - 2,7 1,5 - 3,3 Gas rate min.-max. (Stm Gas pressure min.-max. mbar (see Note 2) 230V 1N.ac - 50 Hz...
- Page 7 Note1: All gas flow rates are referred to Stm /h (1013 mbar absolute pressure, 15 °C temperature) and are valid for G20 gas (nett calorific value H = 34.02 MJ/Stm ); for L.P.G. (nett calorific value H = 93.5 MJ/Stm Note2: Maximum gas pressure = 65mbar (with Dungs MBC 65 DLE valves) Maximum gas pressure = 360mbar (with Dungs MB-DLE valves)
- Page 8 NG90 ..S.. 1/2" Ø80 Ø95 299 Ø78,5 NG90 ..L.. 1/2" Ø80 Ø95 299 Ø78,5 BS = standard blast tube BL = long blast tube DN = gas valves size B*: SPECIAL blast tube lengths must be agreed with Cib Unigas...
- Page 9 149 294 377 304 14 291 Ø80 Ø98 99 145 218 M8 153 96 120 108 292 375 125 208 167 2 438 291 Extended BS = standard blast tube BL = long blast tube DN = gas valves size B*: SPECIAL blast tube lengths must be agreed with Cib Unigas...
- Page 10 Performance curves L.P.G. Burners NG70 M-.TN... NG70 M-.AB... -0,5 -0,5 NG90 M-.TN... NG90 M-.AB... -0,5 -0,5 L.P.G. Burners LG70 L-.TN... LG70 L-.AB... -0,5 -0,5 LG90 L-.TN... LG90 L-.AB... -0,5 -0,5...
- Page 11 Rp ½" (15) Rp ½" (15) Rp ¾" (20) Rp ¾" (20) Gas rate Stm Gas rate Stm L.P.G. Burners LG70 L-.TN... LG70 L-.AB... Rp ½" (10) Rp ½" (10) Rp ½" (15) Rp ½" (15) Gas rate Stm Gas rate Stm...
- Page 12 LG90 L-.TN... LG90 L-.AB... Rp ½" (10) Rp ½ " (10) Rp ½" (15) Rp ½ " (15) Gas rate Stm Gas rate Stm Low NOx burners NGX70 M-.TN... NGX70 M-.AB... Rp ½ " (15) Rp ½" (15) Rp ¾" (20) Rp ¾...
- Page 13 MOUNTINGS AND CONNECTIONS Packing The burners are despatched in cardboard packages whose dimensions are: 400mm x 300mm x 520mm (L x P x H) Packing cases of this type are affected by humidity; the maximum number of cases to be stacked is indicated outside the packing. The following are placed in each packing case.
- Page 14 spacer to move the burner backwards or to design a blast tube tha suites the utilisation (please, contact the manifacturer). a) Heat output in kW b) Length of the flame tube in meters c) Flame tube firing intensity in MW/m d) Combustion chamber diameter (m) Fig.
- Page 15 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.
- Page 16 Power supply without neutral If the burner power supply is 230V three-phase or 230V phase-phase (without a neutral), as fas as the Siemens LME2... control box, the RC Siemens RC466890660 filter must be inserted between terminal 2 and the earth terminal on the board. C - Capacitor (22nF/250V) LME - Siemens control box R - Resistor (1Mohm)
- Page 17 ADJUSTING THE 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.
- Page 18 Plugs for pressure measurement To measure the pressure in the combustion chamber, as far as the IDEA series, a pressure plug is provided upstream the burner’s blast tube. Single-stage models Double-stage models The values in the diagrams refer to natural gas with a calorific value of 8125 kcal/Stm (15°C, 1013 mbar) and a density of 0.714 kg/Stm The values in the diagrams refer to GPL with a calorific value of 22300 kcal/Stm...
- Page 19 L.P.G. Burners LG70 L-. LG90 L-. Gas rate Stm Gas rate Stm Adjusting the 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.
- Page 20 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 described on par. “Measuring the gas pressure in the combustion head” on page 17. (Double-stage burners) Set, now, the low flame output, acting on the low flame actuator microswitch in order to avoid the low flame ...
- Page 21 Setting the startup gas flow rate To adjust the gas flow rate at the startup, proceed as follows: slacken screw A (Fig. 8) in measuring nozzle. Connect pressure gauge. Set to the minimum the pressure regulator by turning adjustment screw B (Fig. 8) anticlockwise . Turn the burner on.
- Page 22 slackening the locking screw VB by a number of turns. By unscrewing the regulator RP the valve opens, screwing the valve closes. T(VR) Dungs Multibloc MB-DLE Fig. 11 To adjust the air flow rate, slacken the nut RA (see picture) and move the lever VRA through the slot as shown in see picture, to increase or decrease the air rate, until the desired rate is obtained;...
- Page 23 Calibration of air and gas pressure switches The 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. The gas pressure switches check the pressure to avoid the burner operate when the pressure value is not in the requested pressure range.
- Page 24 PART II: OPERATION LIMITATIONS OF USE THE BURNER IS AN APPLIANCE DESIGNED AND CONSTRUCTED TO OPERATE ONLY AFTER BEING CORRECTLY CONNEC- TED TO A HEAT GENERATOR (E.G. BOILER, HOT AIR GENERATOR, FURNACE, ETC.), ANY OTHER USE IS TO BE CONSIDE- RED IMPROPER AND THEREFORE DANGEROUS.
- Page 25 PART III: MAINTENANCE 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.
- Page 26 Disassembling the burner plate for the fan maintenance To clean/replace the fan, follow the next procedure: remove the burner plate C by unscrewing the V1, V2, V3 screws and the F fixing pin; hang the plate in one of the ways showed on Fig. 20 figure in order to make maintenance operations easier. NOTE: When re-assembling the component plate, make sure that the pin for the air damper "P"...
- Page 27 Correct electrodes positioning To guarantee a proper ignition, the measures shown in the following pictures must be observed. Ensure the VE locking screw of the electrodes group is tight before refitting the burner. Standard burner Low NOx burners 2÷3 Checking the detection current If the burner locks, perform the following inpesctions.
- Page 28 TROUBLESHOOTING TROUBLE CAUSE MAIN SWITCH OPEN LACK OF GAS MAXIMUM GAS PRESSURE SWITCH DEFECTIVE (IF PROVIDED) THERMOSTATS/PRESSURE SWITCHES DEFECTIVE OVERLOAD TRIPPED INTERVENTION AUXILIARIES FUSE INTERRUPTED CONTROL BOX FAULTY ...
- Page 29 BURNER EXPLODED VIEW ITEM DESCRIPTION ITEM DESCRIPTION BLAST TUBE FLANGE 7.15.3 BRACKET AIR INTAKE 7.16.1 SPACER FAIRLEAD 7.16.2 BUSH BURNER HOUSING 7.16.3 BRACKET SPACER 7.16.4 ACTUATOR GASKET 7.17.1 TRANSFORMER PLASTIC CAP 7.17.2 BRACKET PLASTIC CAP 7.17.3 JUNCTION BOX BLAST TUBE RUBBER FAIRLEAD FAIRLEAD FLANGE...
- Page 31 WIRING DIAGRAMS Wiring Diagrams 01-319/5 - Complete key Single-stage burners Time counter Flame detection electrode Network side gas solenoid valve (or valves group) Burner side gas solenoid valve (or valves group) Fuse Line switch Phase Flame lockout signalling lamp Borner operation lamp LGB (*) / LMG / LME SIEMENS control box Burner power supply terminal board...
- Page 32 Wiring Diagrams 18-070/3 - Complete key Double-stage burners Time counter, low flame Time counter, high flame DMG972 SATRONIC monitor box (alternative) Flame detection electrode EV1,2 Gas electro-valves (or valves group) Fuses Main switch LAF1 Burner in high flame indicator light Burner in high flame indicator light Indicator light for burner lock-out LBF1...
- Page 39 APPENDIX Status Color code Color SIEMENS LME11/21/22 CONTROL BOX Undervoltage Yellow - red z S z S z S z S z S The series of equipment LME.. is used for the starup and supervisione of 1- or 2- stage gas burners. The series LME..is interchangeable with the Fault, alarm S........
- Page 40 LME11 control sequence LME22 control sequence B´ B´ SB / R W / GP SB / R W / GP (LR) BV2 7101d02/0606 LME21 control sequence B´ SB / R W / GP Control sequence Waiting time Purge time TSA Ignition safety time Preignition time Postignition time (LR) BV2...
- Page 41 LME11 connection diagram Connection diagram Error message (alarm) Fuel valve PC control EK2 Remote lockout reset button RESET Flame signal Gas pressure switch Air pressure switch Load controller K2/1 K2/2 Fan motor Control thermostat/pressurestat R / W Safety limit thermostat Limit thermostat /pressure switch Ignition transformer 7101 24 /0606...
- Page 42 CONTROL PROGRAM IN THE EVENT OF FAULT In the event of lockout, the LME.. remains locked and the red signal lamp (LED) will light up.The burner control can immediately be reset. This state If a fault occurs, all outputs will immediately be deactivated (in less is also mantained in the case fo mains failure.
- Page 44 C.I.B. UNIGAS S.p.A. Via L.Galvani, 9 - 35011 Campodarsego (PD) - ITALY Tel. +39 049 9200944 - Fax +39 049 9200945/9201269 web site: www.cibunigas.it - e-mail: cibunigas@cibunigas.it Note: specifications and data subject to change. Errors and omissions exceptd.
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