GAS BURNERS BLU 3000 PR BLU 4000 PR

Transcription

1 GAS BURNERS techniques for energy saving MODELS BLU 3000 PR BLU 4000 PR 220/380 V 60 Hz L.P.G. LB

2 TECHNICAL DATA MODELS BLU 3000 PR BLU 4000 PR Thermal power max. kcal/h kw Thermal power min. kcal/h kw Max. capacity (L.P.G.) Nm 3 /h Min. capacity (L.P.G.) Nm 3 //h Max. gas pressure mbar Min. gas pressure mbar Voltage 60 Hz V 220/ /380 Motor kw 7,5 9 Rpm N Ignition transformer kv/ma 13/35 13/35 Control box LANDIS LFL LFL Gas valve safety 2 2 work 2 2 Fuel : L.P.G kcal/nm 3 WORKING FIELDS Pressure in the combustion control mbar BLU 3000 PR BLU 4000 PR kw Burner output kcal/h x 1000 pag.2

3 I O OVERALL DIMENSIONS E D - D1 B A C L F I M H G MODELS A B C D D1 E F G H I L M BLU 3000 PR BLU 4000 PR D = Short head D1= Long head BURNER INSTALLATION BURNER 2 - NUT 3 - WASHER 4 - GASKET 5 - BOLT 6 - BOILER 7 - GASKET GAS TRAIN INSTALLATION MAIN GAS PIPE 2 - BALL VALVE 3 - GAS FILTER 4 - PRESSURE GAUGE FIXING POINT 5 - GAS PRESSURE SWITCH (MIN) 6 - SAFETY SOLENOID VALVE 7 - SOLENOID VALVE pag.3

4 BURNER START-UP Before starting the burner, make sure it is mounted correctly. Then check connections are correct according to the diagram and piping is appropriate to the system. Before connecting the burner to the electricity supply, make sure voltage corresponds to burner plate data. The connection diagram and startup cycle are shown separately. For wiring from control box to burner, see the enclosed connection diagram. Pay particular attention to neutral and phase connections : never exchange them!. Vent air and impurities of gas pipe. Check gas pressure conforms to the limits stated on the burner plate when connecting a master gauge to the test port provided on the burner. Blower motor starts and pre-purging begins. Since pre-purging has to be carried out with the max. air delivery, the burner control circuit turns the air damper to the max. delivery position by the air servocontrol in approximately 30 seconds time. When the servocontrol is fully open, a signal to the electronic control unit starts the 66 seconds pre-purge cycle. At the end of the prepurging time, the air servocontrol gets to the Low Flame position so that burner ignition is ensured at min. output. Simultaneously the ignition transformer receives voltage and after 3 seconds (pre-ignition) opens the gas valve. Fuel flows to the combustion head and ignites, being governed by the gas firing butterfly valve. Two seconds after gas valves have opened, the ignition transformer is excluded from the circuit. In case of no ignition the burner goes to lock-out within two seconds. Now the burner is operating at the min. firing rate (about 30% of the max. firing rate). The air servocontrol runs at the Low Flame position and in case the temperature control has to be set at the max. output it goes to a fully open position of air damper and butterfly valve. During the burneroff periods the air dumper closes up fully. A T SOLENOID GAS HONEYWELL VE 40...C1002 Adjustment of the initial output : Regulation of 0-40% of the max. output. The adjustment in the factory is done with a medium initial output. The damper is completely effective. Changing of the initial output : take out the screw A, take off the cover T and turn screw H. Turn the screw to the right to obtain a reduction of the ignition output. Turn the screw to the left to obtain an increase of the ignition output. To find the right ignition regulation tighten or loosen the screw H accordingly with on turn and start the burner. Check if the ignition has set off correctly, otherwise tighten or loosen the screw again accordingly with one turn. H D To regulate the gas output thighten or loosen the D with a screwdriver of 12 mm. Reduce gas pressure by turning screw clockwise. Increase gas pressure by turning screw counterclockwise. At end of regulation put on the cover T with screw A. pag.4

5 Q N.B. : The 3 screws must be taken off only when changing the coil. AIR ADJUSTMENT AIR: "LOW FLAME" adjustment is attained by loosening screw B and hand-moving damper C to the desired set-point = OFF 1 = HIGH FLAME 2 = LOW FLAME 3 = AUTOMATIC E - C T B AIR: "HIGH FLAME" adjustment is attained by loosening nut E and moving rod T along the guide as desirer. This will cause the damper to shift and the desirer air delivery will be obtained. After regulation place the switch on the automatic position. GAS BUTTERFLY VALVE REGULATION Adjustment is attained by loosening the screw A and regulating the butterfly valve with a screwdriver.turn the screw to the right to obtain an increase of the ignition output. Turn the screw to the left to obtain reduction of the ignition output. A - Q I - P Sector regulator (to control gas supply ranging from 0 to 100% of max. output). The regulation of gas supply to the butterfly is carried out by tightening or lossening the bolts I in the sector regulator Q by means of an elbowspanner. The movement of the butterfly is controlled by the rod and the pivot according to the shape taken by the blade P in the different position. N.B. : Any setting is to be carried out when burner is on. pag.5

6 - AIR DAMPER MOTOR ADJUSTMENT SQL CAM 1 - Max open position of the air damper ( 90 ). This cam is set at 90 and must not be adjusted. CAM 2 - Starting position of the ignition flame (from 0 to 5 ). CAM 3 - Low flame position. During gas operation, this cam must always be adjusted at least at 5 more than cam n 2. CAM 4 - NOT USED. FIRING HEAD SETTING pag.6

7 BLAST TUBE AND FIRING HEAD DISASSEMBLY ; IGNITION ELECTRODES 3 mm IONIZATION CURRENT The minimum current necessary to operate the control box is 70 µa. When the measurement of the current is required it is necessary to disconnect the lead to the probe and insert in its place a microammeter for direct current ( see fig. under) UV CELL Probe connecting point on control-box LANDIS LFL min. 70 µa Microammeter full-scale 1000 µa pag.7

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12 DESIGN AND SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE La ECOFLAM S.p.A si riserva il diritto di apportare ai prodotti quelle modifiche che riterrà necessarie o utili, senza pregiudicarne le caratteristiche principali. Ecoflam S.p.A. via Roma, RESANA (TV) - Italy - tel. 0423/ r.a. - telex ECOFLA I - telefax 0423/715444