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Unigas LO140 G-.TN Series, Instructions For Installation, Use And Maintenance Manual, Page: 11 / 36

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Unigas LO140 G-.TN Series Instructions For Installation, Use And Maintenance Manual Download Page 11

 

 

11

Hydraulic diagrams for light oil supplying circuits

 

 

 - Gravity circuit 

 

 - Ring circuit 

- Suction circuit 
 

Keys 

1. Manual valve 
2. Light oil filter 
3. Light oil feeding pump 
4. One way valve 
5. Flexible hoses 
6. Relief valve 

 

NOTE: in plants where gravity or ring feed systems are provided, install an automatic interception device (see n. 4–
Fig.4). 

Summary of Contents for LO140 G-.TN Series

Page 1: ...LO140 LO200 Light oil burners MANUAL OF INSTALLATION USE AND MAINTENANCE BURNERS BRUCIATORI BRULERS BRENNER QUEMADORES ГОРЕЛКИ M039154CE Rel 4 2 01 2013 ...

Page 2: ...nnecting 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 us...

Page 3: ...ances 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 CEI EN 60335 1 Household and similar electrical appliances Safety ...

Page 4: ...Actuator double stage burners 14 Air inlet The fuel coming from the supply line is pushed by the pump 11 to the nozzle and then into the combustion chamber where the mixture between fuel and air takes place and consequently the flame In the burners the mixture bertween fuel and air to perform clean and efficient combustion is activated by atomisation of oil into very small particles This process i...

Page 5: ...ble on the boiler s ID plate or in the user s manual Example Furnace input kW 600 Backpressure mbar 4 In the Performance curve diagram Fig 2 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 Fig 1 Data are referred to standard conditions atmospheric pressure...

Page 6: ...7 4 Pressure at the oil train inlet bar 1 Power supply 230V 50Hz Motor kW 0 18 Total power consumption kW 0 48 Protection IP40 Regulation Single stage Double stage Single stage Double stage Approx weight kg 18 18 19 19 Operating temperature C 10 50 Storage temperature C 20 60 Working service Intermittent Light oil net calorific value Hi 10210 kcal kg NOTE ON THE BURNER WORKING SERVICE Burners prov...

Page 7: ...min max min max min max LO140 560 660 80 170 80 270 390 475 390 575 373 108 128 108 188 244 M8 188 108 158 133 32 338 LO200 560 660 65 170 65 270 390 475 390 575 373 108 128 108 188 244 M8 188 108 158 133 32 338 AS BS CS measures referred to burner with standard blast tube AL BL CL measures referred to burner with extended blast tube ...

Page 8: ...es not represent the regulation range of the machine On this diagram the maximum output point is usually reached by adjsuting the combustion head to its MAX position see paragraph Adjusting the combustion head the minimum output point is reached 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 outp...

Page 9: ...he burner use means suitable to support its weight see paragraph Technical specifications The burner is designed to work positioned according to the picture below For different installations please contact the Technical Department Montaggio del bruciatore alla caldaia To install the burner into the boiler proceed as follows 1 on the boiler s door hole fix the 4 stud bolts according to the drilling...

Page 10: ...t be revised consulting the burner manufacturer To choose the blast tube lenght follow the instructions of the boiler manufacturer In absence of these consider the following 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 values between 0 and 100mm into the combustion chamber Pressurised boilers with flame reversal in ...

Page 11: ...ircuit Ring circuit Suction circuit Keys 1 Manual valve 2 Light oil filter 3 Light oil feeding pump 4 One way valve 5 Flexible hoses 6 Relief valve NOTE in plants where gravity or ring feed systems are provided install an automatic interception device see n 4 Fig 4 ...

Page 12: ...en to the nozzle a part comes out from the nozzle while the othe part goes back to the pump In this system the by pass plug if provided must be removed and the optional return port on the pump s body must be sealed by steel plug and washer Double pipe system as for the single pipe system a pipe that connects the tank to the pump s inlet is used besides another pipe that connects the pump s return ...

Page 13: ...ding the gears Pipes should not contain air pockets Rapid attachment joint should therefore be avoided and threaded or mechanical seal junctions preferred Junction threads elbow joints and couplings should be sealed with removable sg component The number of junctions should be kept to a minimum as they are a possible source of leakage Do not use PTFE tape on the suction and return line pipes to av...

Page 14: ...he pump proceed as follows 1 remove the burner cover unscrewing the fixing screws 2 remove the closing nuts A and B on the inlet and return connections of the pump 3 screw the rotating nut of the two flexible hoses on the pump being careful to avoid exchanging the inlet and return lines see the arrows marked on the pump that show the inlet and the return see paragraph l see Double stage burnersLig...

Page 15: ... the mains be sure that its switch is on Off position and find the burner s connectors WARNING The burner is provided with a jumper between terminals 6 and 7 in the event of connecting the high low flame thermostat remove this jumper before connecting the thermostat IMPORTANT while connecting electric supply wires to burner s teminal block be sure that ground wire should be longer than phase and n...

Page 16: ...2 Light oil 11 5 13 2 9 4 9 Priming the pump and Oil rate adjustment Before starting with the adjustments it is necessary to prime the oil pump as follows 1 Remove the burner cover 2 start up the burner with double stage models turn the burner main switch A to On Fig 5 3 make the ST thermostat contacts close see chapter WIRING DIAGRAMS 4 wait until the EVG solenoid valve opens 5 remove the photore...

Page 17: ...4 56 148 750 173 15 74 160 700 186 9 4 00 15 20 155 200 180 4 16 65 170 000 197 7 17 99 183 700 213 6 4 50 17 10 174 600 203 18 73 191 250 222 4 20 24 206 650 240 3 Tab 1 Double stage burners The oil flow rate is adusted by choosing the correct nozze spill back type whose size matches the boiler utilisation input and by setting the delivery and return pressure according to the values on diagram in...

Page 18: ...01 2 25 7 64 8 11 8 55 8 96 9 36 9 74 10 11 10 47 10 81 11 14 11 47 11 78 12 09 12 39 12 68 12 96 13 24 13 51 2 50 8 49 9 01 9 50 9 96 10 40 10 83 11 24 11 63 12 01 12 38 12 74 13 09 13 43 13 76 14 09 14 40 14 71 15 02 2 75 9 34 9 91 10 45 10 96 11 44 11 91 12 36 12 79 13 21 13 62 14 01 14 40 14 77 15 14 15 49 15 84 16 18 16 52 3 00 10 19 10 81 11 40 11 95 12 48 12 99 13 48 13 96 14 41 14 86 15 29...

Page 19: ...vided with key for cams I and IV with scerws for the other cams The Berger actuator is not provided with the manual control for the air damper The Siemens actuator is provided with AUTO MAN mode see pictures above Berger STA Siemens SQN72 High flame position I I red Stand by ignition and Low flame position II II blue EVG2 opening III IV black Combustion head adjustment To adjust the combustion hea...

Page 20: ...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 OPERATION CAUTION before starting the burner up be sure that the manual cutoff valves on the feeding line and on the return are open Be that the mains switch i...

Page 21: ... respective ceramic insulators clean adjust and replace if necessary disassemble and clean the light oil nozzle see Pulizia della testa di combustione e dell ugelloCleaning the combustion head and the nozzle on page 22 Important cleaning must be performed using solvent and not metal tools At the end of maintenance operations after first reassembling the burner light the flame and check its shape r...

Page 22: ... the head from the nozzle holder Fig 10 3 Unscrew the VE screw that fastens the electrodes remove and clean or replace them In order to remove the nozzle it is important to use two wrenches as shown in Fig 10 to avoid damaging the burner component plate 4 clean or replace the nozzle 5 reassemble tall the elements remember to fasten the V and VE screws and re connect the cables CV Fig 10 respecting...

Page 23: ...combustion head and the position of the photoelectric cell and replace it if required Fig 12 LOA24 LMO24 LMO44 Minimum current intensity with flame 45µA Maximun current intensity without flame 5 5µA Maximum possible current intensity with flame 45µA 100µA 100µA Seasonal stop To stop the burner in the seasonal stop proceed as follows turn the burner main switch to 0 Off position disconnect the powe...

Page 24: ...NTROL BOX FAULT SERVOCONTROL FAULT SMOKY FLAME IGNITION TRANSFORMER FAULT IGNITION ELECTRODES DIRTY OR BAD POSITION DIRTY NOZZLE FUEL SOLENOID VALVE DEFECTIVE PHORESISTANCE DIRTY OR DEFECTIVE HIGH LOW FLAME THERMOSTAT DEFECTIVE BAD POSITION OF SERVOCONTROL CAMS FUEL LOW PRESSURE FUEL FILTERS DIRTY WIRING DIAGRAMS WARNING 1 Electrical supply 230V 50Hz 1N a c 2 Don t reverse phase with neutral 3 Ens...

Page 25: ...ING SHAFT 3 2 COVER 11 5 PHOTORESISTOR 3 3 RUBBER COVER FOR UNLOCKING PUSHBUTTON 12 1 SWIRL VANE 4 1 INDEX FIXING SCREW 12 2 IGNITION ELECTRODE 5 FAIRLEAD 12 3 NOZZLE 6 CONTROL BOX 12 4 NOZZLE HOLDER 7 1 HOUSING 13 2 SOCKET FOR CONTROL BOX 7 2 AIR INLET 13 3 TRANSFORMER 7 3 FAIRLEAD 14 IGNITION CABLES 7 4 AIR DAMPER 7 5 AIR FLAP 7 6 BUSH 7 7 BUSH 7 8 AIR DAMPER SHAFT 7 9 PLATE SHAFT 8 GASKET 9 PUM...

Page 26: ...26 ...

Page 27: ...2 2 FAN WHEEL 4 FAIRLEAD 12 3 MOTOR 5 CONTROL BOX 12 4 SHAFT 6 1 HOUSING 12 5 PHOTORESISTOR 6 2 AIR INLET 13 1 NOZZLE HOLDER 6 3 FAIRLEAD 13 2 SWIRL VANE 6 4 AIR DAMPER 13 3 IGNITION ELECTRODE 6 5 AIR FLAP 13 4 NOZZLE 6 6 BUSH 14 CONTROL PANEL ASS Y 6 7 BUSH 15 2 SOCKET FOR CONTROL BOX 6 8 AIR DAMPER SHAFT 15 3 TRANSFORMER 6 9 PLATE SHAFT 15 4 GROUND FIXING 6 10 BUSH 15 5 PRINTED CIRCUIT BOARD 7 G...

Page 28: ...28 ...

Page 29: ...TSA the burner will be reignited but not later than at the end of TSAmax This means that several ignition attempts can be made during TSA refer to Program sequence Limitation of repetitions If the flame is lost during operation a maximum of 3 repetitions can be made If the flame is lost for the 4th time during operation the burner will initiate lock out The repetition count is restarted each time ...

Page 30: ...nal primary fuse W Limit thermostat or pressure switch Z Ignition transformer t4 Interval from flame signal to release BV2 TSA Ignition safety time tw Waiting time for oil pre heating B Time of flame establishment C Operating position D Controlled shut down by R µC1 Microcontroller 1 µC2 Microcontroller 2 General unit data Mains voltageAC 230 V 10 15 AC 120 V 10 15 Mains frequency 50 60 Hz 6 Exter...

Page 31: ...31 Measurement circuit for detector current Key µA DC DC microamperometer with an internal resistance of 5 kW max bl Blue sw Black br Brown ...

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Page 36: ...Note Specifications and and data subject to change Errors and omissions excepted ...

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