baltur COMIST 180 NM Instructions Manual Download

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remote alarm signalling

main relay with “ar” contacts

equipment fuse

blocking relay with “ar” contacts

outer pressure switch (tightness control)

EK...

unblocking button

outer pressure switch (for mains gas pressure)

auxiliary relay with “ar” contacts

equipment trouble signalling lamp

line switch

I...XI

programmer cam contacts

Control programme

Putting control circuit under atmospheric pressure

7,5s

Time between start-up and energizing of main “AR” relay

22,5s

1st verification stage at atmospheric pressure

Putting control circuit gas under pressure

27,5s

2nd verification stage at gas pressure

67,5s

Total time of tightness control, up to burner operation consent

22,5s

Return of programmer to rest position = fresh verification is enabled

Course of programme

Terminals activated by
equipment or by electric
connections

LDU 11.. GAS VALVE TIGHTNESS CONTROL EQUIPMENT

Summary of Contents for COMIST 180 NM

Page 1: ...Edition 2003 11 Cod 0006080810 Instruction for burners model COMIST 180 NM COMIST 250 NM COMIST 300 NM en ...

Page 2: ......

Page 3: ...CEI and UNI standards BALTUR guarantees the CE certification provided that the burner is coupled to the CE gas train supplied by BALTUR and the CE gas line accessories on request NOTE this declaration is not valid with regard to EC or UNI Standards for gas burners or the gas part of duel fuel burners gas light oil or gas heavy oil when such burners have been ordered in non compliance with the EC S...

Page 4: ...e 17 Ignition and regulation with fuel oil 18 Air regulation at the combustion head 19 Adjusting the gap between the disc and nozzle UV photocell Variation for burners fitted with a fuel oil vapour pre heater 20 Ignition and regulation with methane 22 Air regulation at the combustion head 24 Reading the gas meter 24 Using the burner Maintenance 25 General diagram air regulation 26 Air control and ...

Page 5: ...S DE ENCENDIDO GASÓLEO SERBATOIO PRE HEATER RESISTENCIAS kW 15 18 25 5 TENSIONE VOLTAGE TENSIÓN Volt 3N 400V MOTORE VENTOLA FAN MOTOR MOTORES VENTILADOR kW 3 7 5 7 5 MOTORE POMPA PUMP MOTOR MOTORES BOMBA kW 1 1 1 1 2 2 MATERIALE A CORREDO STANDARD ACCESSORIES MATERIAL EN DOTACIÓN GUARNIZIONE ISOLANTE INSULATING GASKET EMPAQUETADURA 2 2 2 FILTRO FILTER 1 1 4 1 1 4 1 1 2 TUBI FLESSIBILI FLEXIBLE PIP...

Page 6: ...tch min 17 Gas pressure switch max 18 UV Photocell 19 Electromagnet 20 Air pressure switch 1 Bomba 2 Servomotor regulación aire 3 Cuadro eléctrico 4 Motor ventilador 5 Tornillo regulación aire en el cabezal de combustión 6 Precalentador 7 Motor bomba 8 Válvula de regulación presión 9 Vólvula funcionamiento tren piloto solo para COMIST 300 NM 10 Válvula de seguridad 11 Válvula de funcionamiento 12 ...

Page 7: ...s Dimensiones A A1 A2 B B1 B2 B3 C D E F G L M N min max COMIST 180 NM 915 465 450 1225 450 775 485 1700 330 540 260 245 DN65 400 M20 300 COMIST 250 NM 1025 545 480 1255 580 675 385 1750 320 500 320 273 DN65 490 M20 340 COMIST 300 NM 1025 545 480 1260 580 680 385 1750 320 500 320 273 DN65 490 M20 350 Mod ...

Page 8: ...orrectly installed when the pre heating tank is slightly inclined higher on the side where fuel exits to go to the nozzle This inclination serves to prevent gas from building up inside the tank Presence of gas in the preheating tank will greatly increase the time required to pressurise the fuel and it is quite likely that the burner will go into block Be careful when installing the burner on the b...

Page 9: ...pressure stabiliser or reducer when the feed pressure exceeds 400 mm H2 O 0 04 kg cm 2 and an anti vibration union These parts must be installed as shown in our drawings see BT 8780 The following practical advice concerns the installation of essential accessories on the gas piping near the burner 1 To avoid big pressure drops on ignition there should be a piece of pipe 1 5 2 m long between the poi...

Page 10: ...mm OF H2 O FLOW IN mc h OF METHANE p a 0 60 LENGTH OF PIPES IN METERS 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 LUNGHEZZA VIRTUALE TRATTA in m VIRTUAL LENGHT DEALT WITH IN METRES LONGUER VIRTUELLE en m VIRTUELLE LÄNGE in m LONGITUD VIRTUAL en m PORTATA FLOW DEBIT DURCHSATZ CAUDAL m3 h BT 1387 ...

Page 11: ...ed at a constant level independently of whether one or more burners are working at the same time thus enabling accurate regulation of the gas feed and therefore combustion resulting in better performance Gas piping must be adequately sized according to the quantity of gas to be supplied therefore it is advisable to keep the load loss within modest values not more than 10 of the gas pressure at the...

Page 12: ...i vibration joint 11 A couple of flane D Distance between pressure stabilizer and valve about 1 5 2 m DIAGRAM OF CONNECTING A BURNER TI THE GAS PIPE NETWORK AT AVERAGE PRESSURE N BT 8531 1 1 Measuring and reducing unit 2 Interception 3 Filter 4 Reducer 5 Meter 6 Wire gauze flame trap 7 Eventual automatic overflow valve it should obviously unload outside in a suitable place 8 Emergency interception...

Page 13: ...quired by the boiler The feed circuit must be executed according to our drawing no 0002901120 The piping must be sized to suit the length of piping and the delivery of the pump used Our instructions only concern that required to ensure good operation SPECIFIC INSTRUCTIONS FOR IGNITING A MIXED FUEL BURNER It is advisable to first ignite the burner using liquid fuel as this feed depends on the nozzl...

Page 14: ...il recovery tanks diameter 150 height 400 should be installed as near as possible to the burner and should be about 0 5 m higher with respect to the burner s pump 1 Main cistern 2 Filter 3 Circulating pump 4 Water discharge and fuel fed system 5 Air gas discharge normally closed 6 Fuel recovery and degasifier 7 One way valve 8 By pass usually closed 9 Adjustable pressure regulator 0 2 1 bar 10 Man...

Page 15: ...ctrodes The high voltage between the electrodes triggers the electrical discharge spark which ignites the fuel air mixture Once the ignition spark has been activated the equipment powers the magnet which by means of special lever mechanisms retracts the two shafts that cut off the flow feed and return of fuel to the nozzle Retraction of the shafts also closes the by pass inside the atomiser unit h...

Page 16: ...ar Closing springs Pump outlet pressure gauge 20 22 bar Pre heater By pass holes 2nd flame pressure regolator 18 20 bar TRU thermostat for D version Return nozzle without needle Shaft with closing cones Atomizer unit Pre heater filter 1 Gauge to detect 1st to 2nd flame return pressure Min H 0 5 m Access to setting screws Gas and air bleeder Pumps NB The burner is fitted with an air pressure switch...

Page 17: ... Suction 1 4 Vacuum meter connection Return Pump plate Delivery nozzle 1 4 Pressure gauge connection Heating element seal Pump pressure regulation 20 22 bar Suction Return Delivery nozzle Pump plate 1 4 Vacuum meter connection Heating element seal 1 4 Pressure gauge connection Pump pressure regulation 20 22 bar ...

Page 18: ...valve Opened 1st flame switched on regolator Closed 1st flame switched off regulator Tie down point pressure gauge to get the backpressure which cause the output variation for the 1st and 2nd flame Pump heating resistance Enter plug to the 20 22 bar regulation pressure pump screw 1st flame pressure regulator heating resistance 18 20 bar Flame backpressure regulator almost less 2 bar than the pump ...

Page 19: ...evice UV photocell allows the ignition phase to proceed and be completed when ignition is deactivated The unit activates the air regulation servomotor which moves the air lock to the set position see BT 8653 1 for the 2nd flame As the air regulation servomotor turns a special cam closes a microswitch that delivers power to the solenoid valve of the 2nd flame which opens gradually Therefore it is c...

Page 20: ...ermine the exact pre heating temperature for the fuel oil Remember that the fuel must reach the nozzle at a viscosity of about 2 E To avoid interference that could cause the burner to stop the regulation thermostat must be set at a temperature of 15 20 C higher than that of the minimum thermostat Once the burner has been ignited check the reading on the pre heater thermometer to ensure that the th...

Page 21: ...oor combustion presence of smoke formation of gas in the pre heater etc If necessary increase or decrease these settings remembering that the regulation thermostat must be set at a temperature of about 15 20 C higher than the setting on the minimum thermostat The minimum thermostat must close at the minimum temperature in order to achieve good combustion viscosity at the nozzle of about 2 E See th...

Page 22: ...t and remain off if the flame does not appear regularly during ignition within the time allowed by the control unit Cut out leads to the fuel being shut off immediately the burner is stopped and the block LED comes on To check the efficiency of the UV photocell and the cut out device proceed as follows a Start the burner b A few minutes after ignition remove the photocell from its seat thereby sim...

Page 23: ...itial setting can be carried out using the pressure reducer according to the value given on the pressure gauge If necessary this setting must be corrected after checking the temperature of the fuel leaving the steam heater Steam pressure on the pressure gauge bar 1 1 5 2 2 5 3 3 5 4 4 5 5 6 7 8 Approximate corresponding temperature C 120 127 133 138 143 147 151 155 158 164 169 174 Once the adjustm...

Page 24: ...ter column instrument for low pressures do not use instruments with pointers 8 Open the air regulator as far as deemed necessary see BT 8653 1 and open the air gap between the disc and head by about one third 9 Operate the regulators on the safety valve and the first flame to enable the required gas delivery starting delivery N B See the last pages for a specific description of the procedure for r...

Page 25: ...ult in immediate burner shut down cut out Reset the burner by pressing the special pushbutton and bring the setting on the pressure switch to a sufficient value for detecting the air pressure present during the pre ventilation phase 18 The gas pressure pressure switches minimum and maximum are used to prevent the burner from working when the gas pressure is outside the required limits According to...

Page 26: ...ered is necessary for the boiler s needs The low calorific value for methane gas is about 8550 kcal m3 To find out the low calorific values of other types of gas contact the Gas Distributing Company Delivery per hour should be taken at the meter When checking delivery make sure that gas is not being consumed by other users If the gas delivery pressure at the meter is not above 400 mm w c take into...

Page 27: ...ng the burner and contact the local Assistance Service to correct the fault MAINTENANCE The burner does not require any particular maintenance however it is a good rule to carry out the following operations at least at the end of the heating season 1 For burners that use gas oil remove and carefully clean the following with a solvent petrol trichloroethane petroleum filters nozzle swirl disc ignit...

Page 28: ...ing knobs of combustion head Combustion air inlet with very locked shutter CORRECT REGULATION Combustion air inlet with air shutter sensibly open Air flow quite locked Attention Avoid complete locking GENERAL DIAGRAM AIR REGULATION Combustion head Control and fixing knobs of combustion head ...

Page 29: ... turn in respect to the reffering scale The pointer of the red ring indicates on the respective reffering scale the rotation angle set for each cam 1 2nd Flame valve connection cam must be adjusted in a position between the 1st flame and the 2nd flame cam 2 Air regulation cam 1 flame 3 Close air shutter cam with burner in stop position 4 Air regulation cam 2nd flame 2 3 4 1 Motor cam shaft couplin...

Page 30: ...nd 2nd flames loosen screw D unpainted screw with raised cylindrical head After the gas flow has been set remember to tighten this screw once more N B To open to the 1st flame position turn the 2nd flame regulation ring L counter clockwise by at least one full turn To set the gas flow for the 1st flame turn knob E turning it clockwise decreases gas flow turning it counter clockwise increases it Fu...

Page 31: ...t at its minimum position Therefore it is essential to open the maximum flow rate control device E sufficiently to ensure ignition Setting the initial rapid release trip To set the initial rapid release unscrew the protection cap F and use the back of this cap as a tool to turn pin G Turning clockwise decreases the gas flow turning counter clockwise increases it This done return cap F to its origi...

Page 32: ...n 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 the chamber above the piston The plate is closed both by the return spring and by gas pressure The flow rate for this valve is calculated to ensure full closure in less than one second This type of v...

Page 33: ...nates when the contact is tripped and the pump cuts out If the power regulator cuts off power supply to terminal 3 the magnetic valve opens and the valve will remain open until the piston reaches the 1st stage position If regulation is shut down because the power supply has been cut off terminals 1 and 3 are no longer powered this causes the servocontrol to close the valve in less than 1 second Re...

Page 34: ...tif FEATURES Valve normally closed With flow regulator Rapid 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 combustion plants They are provided with M I and CE Approval for EN 161 ADJUSTMENT For models VE 4000B1 see fig 1 Adjustment to the flow Remove t...

Page 35: ... 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 burner starts up The fuel valve control contacts are checked for wear during the post ventilation time A built in fuse in the appliance protects the control contacts from any overloads that may occur As r...

Page 36: ...or 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 Programmer synchronous motor v In the case of servomotor auxiliary contact for consensus for fuel valve depending on air damper position V Flame signal amplifier W Thermostat or safety pressure switch z ...

Page 37: ...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 without t11 and t12 3 t9 Second safety time for burners that use pilot burners 12 t10 Time from start up to beginning of air pressure control without air damper travel time t11 Air damper opening trave...

Page 38: ... 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 earthing of terminal 22 is compulsory The power cables must conform to existing national and local standards LFL1 is a safety device and it is therefore forbidden to open it tamper with it or modify it T...

Page 39: ...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 pressure from this moment onwards will cause a lock out stop Lock out stop because of flame detection circuit malfunction Start up sequence stops because the position signal for low flame was not sent to ter...

Page 40: ... 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 operates and the tightness control equipment prevents burner start up and stops in blocked state red pilot lamp lit If second stage verification is positive the LDU 11 equipment closes the internal c...

Page 41: ...ogramme 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 control circuit gas under pressure t2 27 5s 2nd verification stage at gas pressure t5 67 5s Total time of tightness control up to burner operation consent t20 22 5s Return of programmer to rest position ...

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Page 48: ...37 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 only Baltur reserves the right to change specification without notice ...

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