Unigas HR91A Manual Of Installation, Use And Maintenance Download

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Summary of Contents for HR91A

Page 1: ...Rel 3 2 03 2015 BURNERS BRUCIATORI BRULERS BRENNER QUEMADORES Gas light oil dual fuel burners Progressive Fully modulating MANUAL OF INSTALLATION USE MAINTENANCE HR91A HR92A HR93A HR512A HR515A HR520...

Page 2: ...CTIONS FOR BURNERS z 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 z Only b...

Page 3: ...ditions 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 Directi...

Page 4: ...apparatus EN 50165 Electrical equipment of non electric appliances for household and similar purposes Safety requirements UNI EN 746 2 Industrial thermoprocessing equipment Burner data plate For the...

Page 5: ...nd 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 Th...

Page 6: ...kW 480 2670 480 3050 550 4100 Fuel Natural gas Light oil Category see next paragraph Gas rate Natural gas min max Stm3 h 51 283 51 323 58 434 Gas pressure mbar see Note 2 Light oil rate min max kg h...

Page 7: ...tput min max kW 600 4500 770 5200 1000 6400 2000 6700 2000 8000 Fuel Natural gas Light oil Category see next paragraph Gas rate Natural gas min max Stm3 h 63 476 81 550 106 677 212 709 212 847 Gas pre...

Page 8: ...ive Fully modulating Gas train 50 Valves size Gas connection 50 Rp2 50 Rp2 50 Rp2 50 Rp2 Gas train 65 Valves size Gas connection 65 DN65 65 DN65 65 DN65 65 DN65 Gas train 80 Valves size Gas connection...

Page 9: ...185 65 1535 242 831 327 35 300 564 117 490 441 1045 421 1406 971 435 269 299 228 447 360 523 M12 424 280 310 300 632 148 484 846 292 708 228 185 80 1535 242 831 327 35 300 579 132 490 441 1045 421 14...

Page 10: ...30 310 270 100 1723 320 928 371 35 333 639 145 530 517 1193 446 1726 1082 644 380 420 494 540 560 M14 552 390 390 791 149 642 942 353 830 310 270 HR520A 50 1723 320 928 371 35 333 595 100 530 517 1193...

Page 11: ...ble hose 12 Pressure gauge 13 Pressure governor 15 Pressure switch 16 One way valve 16 1 One way valve 17 Flexible hose 18 Flexible hose 19 Manual valve 20 Pressure gauge MAIN GAS TRAIN 23 Pressure sw...

Page 12: ...alve 9 Flexible hose 10 Oil distributor 11 Flexible hose 12 Pressure gauge 13 Pressure governor 15 Pressure switch 16 One way valve 17 Flexible hose 18 Flexible hose 19 Manual valve 19 1 Manual valve...

Page 13: ...o 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 q...

Page 14: ...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 BACK PRESSURE IN COMBU...

Page 15: ...h HR520A MG Stm3 h GAS PRESSURE mbar HR525A MG Rp2 Stm3 h HR525A MG DN65 80 100 Stm3 h Caution the gas rate value is quoted on the x axis the related network pressure is quoted on the y axis pressure...

Page 16: ...Stm3 h GAS PRESSURE mbar HR520A LG Stm3 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 includ...

Page 17: ...the combustion chamber 3 Gas pressure outlet on the butterfly valve 4 Differential pressure gauge 1 12 Measuring the gas pressure in the combustion head In order to measure the pressure in the combust...

Page 18: ...40 60 80 100 120 140 160 180 200 220 240 260 280 300 0 5 10 15 20 25 30 35 40 45 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 0 5 10 15 20 25 30 35 40 45 50 50 75 100 125 150 175 200...

Page 19: ...tm3 h HR93A LG Stm3 h Gas pressure in combustion head HR512A LG Stm3 h GAS PRESSURE mbar HR520A LG Stm3 h 0 2 4 6 8 10 12 14 16 18 20 22 24 26 10 20 30 40 50 60 70 80 90 100 110 0 10 20 30 40 50 60 70...

Page 20: ...placed in each packing case z burner with detached gas train z gasket or ceramic fibre plait according to burner type to be inserted between the burner and the boiler z envelope containing this manua...

Page 21: ...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 match...

Page 22: ...tes the utilisation please contact the manifacturer Fig 7 Key a Heat output in kW b Lenght of the flame tube in meters c Flame tube firing intensity in MW m3 d Combustion chamber diameter m Fig 7 Firi...

Page 23: ...direction for each item NOTE the bellows unit the manual cutoff valve and the gaskets are not part of the standard supply ATTENTION BEFORE EXECUTING THE CONNECTIONS TO THE GAS PIPE NETWORK BE SURE TH...

Page 24: ...re fitted z Connect the reference gas pipe TP in figure 8mm external size pipe supplied loose to the gas pressure nipples placed on the gas pipe downstream the gas valves gas pressure must be measured...

Page 25: ...n for a preset time td4 in order the bring the test space to ambient pressure Test atmospheric pressure EV1 closes and keep this position for a preset time test time td1 The pressure switch PGCP has n...

Page 26: ...ing circuits NOTE in plants where gravity or ring feed systems are provided install an automatic interception device Fig 13 Gravity circuit Fig 14 Ring circuit Fig 15 Suction circuit Key 1 Manual valv...

Page 27: ...led to avoid air and fuel passing through the pump Burners come out from the factory provided for double pipe systems They can be suited for single pipe system recommended in the case of gravity feed...

Page 28: ...t to a minimum as they are a possible source of leakage z Do not use PTFE tape on the suction and return line pipes to avoid the possibility that particles enter circulation These could depo sit on th...

Page 29: ...ing nuts A on the pump inlet and R from pump to the burner 2 screw the rotating nut of the two flexible hoses on the pump being careful to avoid exchanging the lines see the arrows marked on the pump...

Page 30: ...terminal X3 04 4 in case of LMV2x LMV3x LMV5x LME7x on the board and the earth terminal an RC Siemens RC466890660 filter must be inserted For LMV5 control box please refer to the clabeling recommendat...

Page 31: ...R OPEN OR DISMANTLE ANY COMPONENT OF THE MACHINE EXCEPT FOR ITS MAINTENANCE TO SECURE THE MACHINE ACT ON THE ISOLATOR SWITCH IN CASE OF ANOMALIES THAT REQUIRED A SHUT DOWN OF THE BURNER IT S POSSIBLE...

Page 32: ...provided B1 Lock out LED B2 Hi flame operation LED B3 Lo flame operation LED B4 Ignition transformer operation LED B5 Fan motor overload tripped LED B6 Stand by signalling lamp G1 Gas valves EV2 opera...

Page 33: ...requirements Operation in high or low flame is signalled by lamp B2 on the frontal panel 4 4 Light oil operation z The fan motor starts and the pre purge phase as well Since the pre purge phase must b...

Page 34: ...cam sets the air gas ratio in those points regulating the opening closing of the throttle gas valve z Set now the low flame output acting on the low flame microswitch of the actuator in order to avoi...

Page 35: ...t upside down and use it as a tool to rotate screw VR Clockwise rotation reduces start flow rate anticlockwise rotation increases it Do not use a screwdriver on the screw VR Note the screw VSB must be...

Page 36: ...nimum output point 12 as for the point to point regulation move the gas low flame microswitch a little lower than the maximum position 90 13 set the TAB thermostat to the minimum in order that the act...

Page 37: ...he transparent plastic cap z While the burner is operating at the maximum output test the gas pressure on the pressure port of the minimum gas pressure switch z Slowly close the manual cutoff valve pl...

Page 38: ...djusting ring nut VR in the clockwise direction 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 z Repe...

Page 39: ...rner is designed z For natural gas burners plate holes are fully opened 6 12 Center head holes gas flow regulation LPG burners To adjust the gas flow partially close the holes as follows 1 loosen the...

Page 40: ...angle according to the return pressure _________ Flow rate ATTENTION To achieve the maximum flow rate close completely the return line FLOW RATE kg h DIMENSIONS Min Max 40 13 40 50 16 50 60 20 60 70...

Page 41: ...nozzle is provided set the return pressure at 11bar supply at 20bar on the delivery to get a 220kg h flow rate If the return pressure needed is 5bar instead act on the V adjusting screw on the pressu...

Page 42: ...PART III OPERATION 42 Fig 18...

Page 43: ...raph 9 in order to get the maximum oil flow rate adjust the pressure reading its value on the PG pressure gauge without changing the air flow rate set during the gas operation adjustments see previous...

Page 44: ...cks that the pressure does not exceed a default value This value must not be higher than the maximum acceptable pressure on the return line this value is reported on the specification table A pressure...

Page 45: ...son z Clean and grease joints and rotating parts IMPORTANT Remove the combustion head before checking the ignition electrode z Remove and clean the compressed air regulator z Remove and clean the oil...

Page 46: ...scribed above 9 5 Electrodes Adjustment To replace the spring in the gas valve group proceed as follows 1 Carefully twist the protection cap 1 and the O ring 2 2 remove the set value spring 3 from hou...

Page 47: ...the nozzle position according to the air pipe by means of the VU screw ance the VL screw is fastened 9 7 Checking the detection current To check the detection signal follow the scheme in the picture...

Page 48: ...an the bulbe if dirty taking care not to touch it with bare hands 5 if necessary replace the bulb 6 replace the photocell into its slot 9 9 Seasonal stop To stop the burner in the seasonal stop procee...

Page 49: ...MAINTENANCE 49 10 0 WIRING DIAGRAMS Refer to the attached wiring diagrams WARNING 1 Electrical supply 230V 50Hz 1 a c 400V 50Hz 3N a c 2 Do not reverse phase with neutral 3 Ensure burner is properly...

Page 50: ...AIN SWITCH OPEN z LACK OF GAS z z MAXIMUM GAS PRESSURE SWITCH DEFECTIVE IF PROVIDED z z THERMOSTATS PRESSURE SWITCHES DEFECTIVE z z z FAN MOTOR THERMAL CUTOUT INTERVENTION z OVERLOAD TRIPPED INTERVENT...

Page 51: ...PART IV MAINTENANCE 51 12 0 BURNER EXPLODED VIEW...

Page 52: ...NT CONTROL PANEL 2 2 FAN WHEEL 10 2 LIGHT 3 1 STANDARD COMBUSTION HEAD 10 3 LIGHT 3 2 STANDARD COMPLETE OIL GUN 10 4 SWITCH 3 2 1 1 SOLENOID VALVE 10 5 LOCK OUT RESET BUTTON 3 2 1 2 ONE WAY VALVE 10 6...

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Page 56: ...ia 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 a...

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