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1) If not already done at the moment of connecting the burner to the gas pipeline, it is indispensable to carry out

a purge of the air contained in the pipeline. As a precaution, special care should be taken and doors and
windows should be opened. Open the pipe union on the pipeline situated near the burner and the open a little
the gas cut-off cock (or cocks). When the characteristic odour of gas can be smelled, close the cut-off cock.
Wait until the gas present in the room has dispersed, and then reconnect the burner to the gas pipeline.
Subsequently, re-open the gas cut-off cock.

2) Check that there is water in the boiler and that the system’s gas valves are open.

3) Check, with absolute certainty that the discharge of combustion products can take place freely (boiler and

chimney lock-gates should be open).

4) Make sure that the voltage of the electric line to which the burner is to be connected, corresponds to that

required by the burner and that the electrical connections (motor or principle line) have been prepared to
match the voltage rating available. Also check that all the electrical connections carried out on the spot are in
accordance with our electric wiring diagram.

5) Make sure that the combustion head is long enough to enter the furnace to  the extent specified by the boiler

manufacturer. Check that the device which regulates the air on the combustion head is in the position considered
necessary for the fuel delivery required (air passage between the disk and the head should be considerably
reduced when the fuel delivery is reduced; on the other hand, when the fuel delivery is fairly high;  the air
passage between the disk and the head should be relatively open). See chapter “Air Regulation on the
Combustion Head”.

6) Apply a manometer with an adequate scale (if the entity of pressure forecast allows it; it is preferable to use a

column of water instruments, do not  use a pointer instrument for moderate pressure) to the pressure plug on
the gas  pressure switch.

7) Open, to the quantity considered necessary, the flow regulator incorporated in the ignition flame valve(s)

(pilot). If the burner is already working on light oil fuel, the combustion air regulation shutter must not be
modified; in such a case it will be necessary to adjust the gas flow to the amount of air already adjusted for the
light oil operation. If the burner is started up only on gas it is necessary to verify that the combustion air
regulation shutter is in the right position and, if not, to modify it by operating the adjustable screws of the
regulating disk.

8) Remove the protective cover from the disk on which are inserted the screws which regulate the gas and air

delivery, and unloosen the locking screws.

9) With the switch on the burner’s control panel in the “O” position and the main switch inserted check by manually

closing the relay, that the motor rotates in the right direction. If it does not, exchange the places of two cables
of the motor’s supply line in order to invert its sense of rotation.

10) Now insert the switch on the commend panel and put the modulating switches in the MIN (minimum) and MAN

(manual) positions. The control box receives voltage in this way and the programmer turns on the burner as
described in Chapter “Description of Operations”.

Note: Pre-ventilation is carried out with air open and, during this phase, the servomotor regulating the delivery

(gas/air) is inserted and completes the whole opening run until it reaches the “maximum” position.
Subsequently, the servomotor which regulates delivery (gas/air) returns to the starting position (minimum).
Only when modulation has returned to the “minimum” position, does the control box proceed with its ignition
programme and insert the transformer and the gas ignition valves (pilot). During the pre-ventilation phase
check that the air pressure switch effects a changeover (it should pass from a closed position without
measurement of pressure to a closed position with measurement of air pressure).
If the air pressure switch does not measure sufficient pressure (it will not effect the changeover) and neither
the ignition transformer nor the gas ignition flame valves will be inserted and the control box will go to “shut
down”. It should be pointed out that “shut downs” during the first ignition phase are considered normal.   This
is because air still exists in the pipeline of the valve incline and must be expelled before it is possible to have
a stable flame. To unblock the control box, press the relative pushbutton.

STARTING UP AND REGULATION WITH METHANE GAS

Summary of Contents for COMIST 72 DSPGM

Page 1: ...DSPGM en The works on the burner and on the system have to be carried out only by competent people Read carefully the instructions before starting the burner and service it The system electric feeding...

Page 2: ...de linea gas certificados CE suministrables a pedido NOTA la presente declaraci n no tiene validez respecto a la Norma CE o UNI para los quemadores de gas y para la parte de gas de los quemadores mixt...

Page 3: ...ACCESSORIES MATERIAL EN DOTACI N STANDARDZUBEH R FLANGIA ATTACCO BRUCIAT BURNER FIXING FLANGE BRIDA UNI N BEFESTIGUNGSFLANSCH 2 2 COLLAREELASTICO ELASTIC COLLAR COLLAR N EL STICO FEDER 1 1 GUARNIZIONE...

Page 4: ...s pressure switch min 5 Gas pressure switch max 6 Gas pressure switch max 7 Butterfly 8 Pilot main valve 9 Hinge 10 Main valve 11 Regulation valve return pressure 12 Safety valve 14 Electric board 15...

Page 5: ...iones N 0002570030 Rev A A1 A2 B B1 B2 B3 C D E F G L M N MIN MAX COMIST 72 DSPGM 670 400 270 810 375 435 265 1410 185 445 227 220 2 240 M16 240 COMIST 122 DSPGM 830 460 370 1170 455 715 1500 195 455...

Page 6: ...ERIALE A CORREDO STANDARD ACCESSORIES MATERIAL EN DOTACI N STANDARDZUBEH R FLANGIA ATTACCO BRUCIAT BURNER FIXING FLANGE BRIDA UNI N BEFESTIGUNGSFLANSCH 1 1 1 1 1 GUARNIZIONEISOLANTE INSULATING GASKET...

Page 7: ...Pilot main valve 9 Pilot safety valve 10 Main valve 11 Regulation valve return pressure 12 Safety valve 14 Electric board 15 Pump motore 16 Combustion head air control knob 17 Burner fixing flange 18...

Page 8: ...M N min max min max COMIST 180 DSP GM 875 460 415 1225 510 715 1725 330 520 260 245 2 1 2G 400 400 M 20 300 COMIST 250 DSP GM1075 540 535 1300 580 720 1750 320 500 320 273 3 G 490 490 M 20 340 COMIST...

Page 9: ...9 COMIST 36 72 122 N 8187 1 Rev COMIST 180 250 300 N 8111 2 Rev...

Page 10: ...10 DRAWING SHOWING THE GAS TRAIN ASSEMBLY COMIST 72 MG DSPGM N 8805 Rev DRAWING SHOWING THE GAS TRAIN ASSEMBLY COMIST 122 180 250 300 MG DSPGM DSPNM N 8797 Rev...

Page 11: ...that the inner faces are parallel between them Since the locking system is highly efficient do not tighten the nuts too much During this operation tightening of the flange locking nuts keep the body...

Page 12: ...o avoid big drops in pressure on ignition the length of the pipeline between the point where the stabilizer or reducer is fitted and the burner should be from 1 5 to 2 m This pipe must have a diameter...

Page 13: ...13 FLOW m3 h METHANE GAS d 0 85 IN COMMERCIAL GAS PIPES UNI 3824 68 LOAD LOSS MAX 5 mm W C N BT 1387 VIRTUAL LENGTH IN METERS FLOW m 3 h...

Page 14: ...e to accurately regulate the delivery and therefore the combustion and thus improve yield The dimension of the gas pipeline should be in function with the quantity of gas it has to deliver We advise m...

Page 15: ...vibration joint 11 A couple of flane D Distance between pressure stabilizer and valve about 1 5 2 m DIAGRAM OF CONNECTING A BURNER TO THE GAS PIPE NETWORK AT AVERAGE PRESSURE N BT 8531 1 1 Measuring...

Page 16: ...l feed pressure at the burner pump 0 2 1 bar should not vary when the burner is at a standstill or when it is operating at the maximum fuel delivery required by the boiler Normally it is possible to r...

Page 17: ...the burner s pump 1 Main cictern 2 Filter 3 Circulation pump 4 Water and system drain 6 Fuel recovery and degasifier 7 One way valve 8 By pass usually closed 9 Feeding circuit presure regulator adjust...

Page 18: ...trodes primes the electric spark for ignition of the fuel air mixture After the insertion spark appears the control box carries voltage to the magnet which by means of appropriate levers moves backwar...

Page 19: ...G OPERATIONS WITH LIGHT OIL COMIST MM See BT 8714 2 The burner s control box cyclic relay is connected by operating panel switch I Control box specifications The cyclic relay control box carries out t...

Page 20: ...rews which vary the profile of the commend disk of the combustion air regulator Fuel and combustion air delivery both increase at the same time until they reach maximum value light oil pressure at the...

Page 21: ...SSURE GAUGE 0 40 BAR 4 ATOMIZER UNIT 5 RETURN NOZZLE WITHOUT PIN 6 ROD WITH CLOSING PINS 7 BY PASS HOLES 8 CLOUSING SPRING 9 OPENING ELECTROMAGNET 10 RETURN PRESSURE REGULATOR MIN 10 12 BAR MAX 18 20...

Page 22: ...22 N 0002900580 BALTUR PUMP...

Page 23: ...the relative combustion air until it reaches the maximum delivery value at which the burner has been regulated N B The V cam of the servomotor regulating air gas delivery see BT 8562 1 inserts almost...

Page 24: ...e which in turn opens completely Gas delivery is not determined by the principle valve but by the position of the gas delivery regulation valve see BT 8816 1 and BT 8813 1 The burner remains in the ma...

Page 25: ...lation shutter 15 Ignition flame valve pilot with delivery regulator D Distance between pressure stabilizer and flange about 1 5 2 m DIAGRAM FOR MODULATING OR TWO STAGE PROGRESSIVE GAS AND DUAL FUEL B...

Page 26: ...16 1 DETAILS ON THE REGULATION OF GAS DELIVERY IN MODULATING BURNERS WITH THROTTLE VALVE COMIST 180 250 300 DSPGM DSPNM N BT 8813 1 The notch shown on the end of the shaft indicates the position pf th...

Page 27: ...out air bubbles and then re close the gate valve 11 Insert a manometer end of the scale about 3 bar into the vacuumeter connection point on the pump and control the value of the pressure at which the...

Page 28: ...ater in the system should be at the right temperature and the burner should have been operating for at least 15 minutes If the appropriate instruments are not available judgement can be based on the c...

Page 29: ...p the burner and make a first adjustment as previously described When maximum delivery desired has been reached proceed with correcting the position of the combustion head move it backwards and forwar...

Page 30: ...ion air regulation shutter must not be modified in such a case it will be necessary to adjust the gas flow to the amount of air already adjusted for the light oil operation If the burner is started up...

Page 31: ...indication for methane gas the percentage should be from at least 8 at minimum burner delivery to an optimum value of 10 for maximum delivery We advise against exceeding the value of 10 to avoid oper...

Page 32: ...topping the burner functioning when the gas pressure is not within the values specified From the specific functions of the pressure switches it is evident that the pressure switch which controls the m...

Page 33: ...ds and forwards in such a way as to obtain an air flow suitable for the light oil delivery with the air regulation shutter in suction considerably open It the combustion head is pushed forwards which...

Page 34: ...e burner to operate for a long time only a few minutes if the output exceeds the maximum allowed for the boiler to avoid possible damage to it it would be timely to stop the burner immediately after h...

Page 35: ...ng Principle feed valve s B Insertion and disinsertion lever Motor connection camshaft Position 1 Disinsertion Position 2 Insertion To modify the regulation of the cams utilized operate the respective...

Page 36: ...e will not be sufficient supply for ignition if the flow feed device E is set at its minimum position Therefore it is essential to open the maximum flow rate control device E sufficiently to ensure ig...

Page 37: ...the open position while the pump and magnetic valve remain powered When the unit receives the signal to close or if power supply is cut off the pump shuts down the magnetic valve opens decompressing...

Page 38: ...opening and closing The VE4000B1 valves are Class A solenoid valves normally closed They may be used as ON OFF valves in the supply trains with Natural Gas Manufactured Gas or GPL on burners or combus...

Page 39: ...tolerated post combustion period The tests will end only at the end of the pre ventilation time of the next start up The validity of working of the flame control circuit is checked each time the burne...

Page 40: ...r fan or burner NTC NTC resistor QRA UV probe R Thermostat or pressure probe RV Fuel valve with continuous regulation S Fuse SA Air damper servomotor SB Safety limiter temperature pressure etc SM Prog...

Page 41: ...power regulator or at valve on terminal 20 18 t6 Post ventilation time with M2 3 t7 Time between consensus for start up and voltage at terminal 7 start delay for fan motor M2 72 t8 Start up duration w...

Page 42: ...z of the air damper servo motor During the probe test and false flame test the flame supervision test is also powered terminals 22 23 and 22 24 Safety standards In association with the use of QRA eart...

Page 43: ...ignal was not sent to terminal 8 by limit switch contact a Terminals 6 7 and 15 remain powered until the defect is eliminated P Lock out stop because of lack of air pressure signal Any lack of pressur...

Page 44: ...During the second verification stage this pressure must remain constant Should it drop this means that the burner on the furnace side has a blow by fault when closing Therefore the DW pressure switch...

Page 45: ...gramme t4 5s Putting control circuit under atmospheric pressure t6 7 5s Time between start up and energizing of main AR relay t1 22 5s 1st verification stage at atmospheric pressure t3 5s Putting cont...

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Page 70: ...7 11 Fax 051 685 75 27 28 International Tel 39 051 684 37 1 1 Fax 39 051 683 06 86 http www baltur it http www baltur com E MAIL info baltur it Technical data in this brochure are given as information...

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