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6.1.2.8

Edition 06.07

Technical Information · GB

www.kromschroeder.com

For pilot and main burners of unlimited capacity in intermittent or continuous

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operation pursuant to EN 746-2
Automatic burner control unit, ignition transformer, indicators and operating

•

controls in a space-saving metal housing which replaces the local burner

control cabinet
Flame control by UV, ionisation or a further option of using the furnace

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chamber temperature
Display of the program status, unit parameters and flame signal; Manual

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mode for burner adjustment and for diagnostic purposes
Visualisation and adaptation to the specific application via the PC

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programming and diagnostic software BCSoft to simplify logistics

management
Spacious connection chamber with plug-in terminal blocks and plug-in cable

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glands for quick installation and servicing
Air valve control relieves the furnace control

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Optional PROFIBUS-DP interface

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EC type-tested and certified

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Burner control units BCU 480

Содержание BCU 480

Страница 1: ... further option of using the furnace chamber temperature Display of the program status unit parameters and flame signal Manual mode for burner adjustment and for diagnostic purposes Visualisation and adaptation to the specific application via the PC programming and diagnostic software BCSoft to simplify logistics management Spacious connection chamber with plug in terminal blocks and plug in cable...

Страница 2: ... BCU D2 or BCU D3 23 5 2 6 UVS check 26 5 3 Pilot and main burner monitoring 27 5 3 1 Permanent pilot burner 28 5 3 2 Interrupted pilot burner 28 5 4 Behaviour in start up position standby 29 5 4 1 Flame simulation check in start up position standby 29 5 4 2 Minimum burner pause time tBP 30 5 5 Behaviour during start up 31 5 5 1 Safety time on start up tSA 31 5 5 2 Flame proving period tFS 32 5 5 ...

Страница 3: ... 7 10 BCU switched off 55 7 11 Furnace control 55 7 12 Mains switch 55 7 13 Note on EC type examination 55 7 14 Changing parameters 56 8 Flame control 57 8 1 With ionisation sensor 57 8 2 With UV sensor 57 8 3 Via the temperature in high temperature equipment 57 9 Accessories 58 9 1 High voltage cable 58 9 2 16 pin industrial plug connector 58 9 3 BCSoft 58 9 4 Changed parameters stickers 58 9 5 E...

Страница 4: ...over tasks that only relate to the burner for example it ensures that the burner always ignites in a safe condition when it is restarted The air valve control assists the furnace control for cooling purging and capacity control tasks The program status the unit parameters and the level of the flame signal can be read directly from the unit The burner can be controlled manually for commissioning an...

Страница 5: ...al PROFIBUS DP interface to transfer the ac tivation signals and feedbacks so as to expand the remote servicing and diagnostics facilities Bogie hearth forg ing furnace in the metallurgical in dustry Intermittent shuttle kiln in the ceramics industry Walking beam furnace with over head firing Application ...

Страница 6: ...started with re duced capacity after the operating signal from the pilot burner has been detected The pilot burner is switched off automati cally after the main burner has started up When the main burner is switched off the pilot burner automatically switches on again This reduces the main burner start up time A UV sensor monitors the flame signal from pilot and main burners UV sensor UVD 1 is use...

Страница 7: ...lled main burner 2 2 with permanent pilot burner Control Main burner ON OFF The main burner can be started with reduced capacity after the operating signal from the pilot burner has been detected Pilot and main burners can be operated simultaneously This reduces the time required by the main burner for starting up The BCU provides the cooling and purg ing processes Examples of application ...

Страница 8: ...Control Main burner ON OFF with ignition via bypass The main burner can be started at low fire rate after the operating signal from the pilot burner has been detected When the operating state is reached the BCU issues the Enable signal for the maxi mum burner capacity Pilot and main burners can be operated simultaneously This reduces the time required by the main burner for starting up The BCU pro...

Страница 9: ... ig nition position in order to start the main burner The main burner can be started at low fire rate after the operating signal from the pilot burner has been detected The control system controls the burner capacity via the butterfly valve for air after the operating state has been sig nalled Pilot and main burners can be operated simultaneously This reduces the time required by the main burner f...

Страница 10: ...l of the flame signals and the current program status Control signals that are relevant for safety such as the safety interlocks purge op tional and digital input are transferred independently of the bus communication by separate cables BCU 480 D 2 6 High temperature equipment Indirect flame control using the tempera ture During the start up process as long as the wall temperature is below auto ig...

Страница 11: ...6 EC in conjunction with EN 298 Low Voltage Directive 73 23 EEC in conjunction with EN 60730 Electromagnetic Compatibility Directive 89 336 EEC AGA 3 2 Certified under No 6478 FM 3 3 BCU T is FM approved Standard Factory Mutual Research Standard 7610 June 1997 Suitable for applications pursuant to NFPA 86 Profibus User Organisation 3 4 BCU B1 PUO PROFIBUS User Organisation Certificate No Z 00692 p...

Страница 12: ...30 31 32 33 34 35 36 37 DI 50 51 l 38 F3 BCU 480 C 40 41 42 43 44 45 46 47 UVS 1 2 3 P 5 6 7 8 11 9 10 12 13 14 15 25 26 27 18 19 20 22 24 PE 7 8 9 10 24 25 PE 7 8 9 24 A 23 ϑ 3 4 1 ϑ2 21 Function 4 Connection diagrams 4 1 For cable selection and wiring see Project planning informa tion BCU 480 4 1 1 For the explanation of symbols see Legend ...

Страница 13: ...OFIBUS DP 2B 2A 1B 1A OFF ON F3 BCU 480 C B1 40 41 42 43 44 45 46 47 UVS 1 2 3 P 5 6 7 8 11 9 10 12 13 14 15 25 26 27 18 19 20 22 24 PE 7 8 9 10 24 25 PE 7 8 9 24 OFF ON BCU 480 B1 with Profibus 4 1 2 For the explanation of symbols see Legend For further information on BCUs with Profibus see Technical Information Bulletin Burner control unit for Profibus DP BCU 400 B1 Function Connection diagrams ...

Страница 14: ...ug pursuant to VDE 0627 This 16 pin plug connector ensures fast connecting or disconnecting of units without any additional wiring required This simplifies replacing units and reduces standstill times All signals to the higher level control system the mains supply and the safety interlocks are routed via this plug See Accessories Function Connection diagrams ...

Страница 15: ...3 BCU 480 P C 40 41 42 43 44 45 46 47 UVS 1 2 3 5 6 7 8 11 9 10 12 13 14 15 25 26 27 18 19 20 22 24 PE 7 8 9 10 24 25 PE 7 8 9 24 23 3 4 2 DI 16 15 14 12 11 10 9 8 7 6 5 4 3 2 1 P A L1 L1 N L2 PE 16 15 14 8 7 12 5 11 10 4 3 9 2 1 6 2 1 21 17 16 28 29 ϑ1 ϑ2 BCU 480 P with industrial plug connector For the explanation of symbols see Legend Function Connection diagrams ...

Страница 16: ...nction of the internal electronic cir cuitry or of the flame sensors the burner can be started The pilot burner start up is activated via the signal input Start up signal V1 terminal 4 Once the start up signal ϑ1 has been applied the BCU 480 opens valve V1 and ignites the burner The ignition time tZ is constant If a flame is detected during the safety time tSA1 the flame proving period tFS1 starts...

Страница 17: ... burner is ignited by the pilot burner If a flame is detected during the safety time tSA2 the flame proving period tFS2 starts after the safety time tSA2 has elapsed If the main burner has been started suc cessfully and its flame has stabilised the operation signalling contact terminals 28 29 closes Start up of the pilot burner without flame signal If no flame is detected during the safety time tS...

Страница 18: ...e parameter 12 Pilot burner restart Start up of the main burner without flame signal If no flame is detected during the safety time tSA2 either a fault lock out occurs or up to three further start up attempts occur The required functions and if applicable the number of start up at tempts must be specified when order ing Parameter 11 Main burner start up attempts Behaviour of the main burner in the...

Страница 19: ...ilot burner 2 Start up without flame signal pilot burner Flame proving period pilot burner 3 Flame failure during flame proving period pilot burner Operation pilot burner 4 Flame failure during operation pilot burner Waiting time main burner 5 Flame simulation main burner Safety time on start up main burner 6 Start up without flame signal main burner Flame proving period main burner 7 Flame failur...

Страница 20: ...0 1 0 Restart main burner 13 0 1 0 Safety time during operation for V1 and V2 tSB 14 1 2 s 1 s Flame simulation check in start up position standby 15 0 1 1 Permanent pilot burner 16 0 1 1 Minimum combustion time tB 20 25 s tSA Minimum burner pause time tBP 21 0 250 s 0 s Pilot burner safety time on start up tSA1 22 3 5 10 s Pilot burner flame proving period tFS1 23 0 25 s 0 s Main burner safety ti...

Страница 21: ...ameterisation ensure that the program sequence started matches the application This parameter may be set in this way only if the burner can restart as intended in all operating phases Scanning the parameters 5 1 During operation the 7 segment display shows the program status The flame signal and all following parameters of the BCU can be scanned one after the other by repeatedly pressing the Reset...

Страница 22: ...rogram position the unit was in when the fault was detected waiting time 01 or standby 00 Result A flame simulation was detected during the waiting time or standby Switch off threshold of the flame amplifier 5 2 4 Parameter 04 pilot burner switch off threshold Parameter 05 main burner switch off threshold The sensitivity at which the burner control unit still detects a flame can be set between 1 a...

Страница 23: ...thout evaluation of the flame signal The safety function of the device internal flame control system is placed out of operation In High temperature mode the gas valves are opened without flame control The precondition for high temperature operation is that an external flame safeguard ensures the presence of the flame in fail safe manner indirectly via the temperature For this purpose we recommend ...

Страница 24: ...sconnected from the electrical power supply and restarts with flame simulation check recommended in the case of UV control with UVS Parameter 33 3 BCU D3 08 08 t 26a 16c 18e 2c 4c 18a 14a 88 10e 26e 30a 28c 2e 4e 6a 6e 22a V1 1 V2 2 ϑ1 ϑ2 2 1 DI The burner remains in operation and the BCU performs flame control again recommended in the case of ionisation control or UV control with UVD Parameters F...

Страница 25: ... performs a fault lock out regardless of parameter 33 Fault pilot burner t 9 12 V1 1 14 V2 2 ϑ1 ϑ2 2 16 17 1 24 21 88 4 5 1 7 18 19 28 29 6 DI 04 04 Fault main burner 08 t 9 12 V1 1 14 V2 2 ϑ1 ϑ2 2 16 17 1 24 21 88 4 5 1 7 18 19 28 29 6 DI 08 Parameters Flame control High temperature operation in the case of BCU D2 or BCU D3 ...

Страница 26: ...ach time the start up signal ϑ is applied Parameter 35 0 Unlimited burner operation Parameter 35 1 An automatic restart is activated once every 24 hours It must be ensured in this case that the program sequence started matches the application This parameter may be set in this way only if the burner can restart as intended in all operating phases Parameters Flame control ...

Страница 27: ... pilot burner t 1 2 ϑ1 ϑ2 88 02 04 06 08 04 06 08 04 For applications which require a high system availability or where a continuously burning flame is necessary The pilot burner is ignited once and remains constantly in operation The main burner is controlled separately Intermittent pilot burner t 1 2 ϑ 88 02 04 06 08 00 02 04 06 08 00 Pilot and main burners are controlled with one start up sig n...

Страница 28: ...in the illustration Permanent pilot burner with the difference being that the start up signal for pilot and main burners is applied synchronously and that immediately after the flame proving period tFS1 the main burner is started Interrupted pilot burner 5 3 2 Parameter 16 0 tSA1 tZ 04 06 07 08 02 03 00 t tFS1 tSA2 tFS2 88 9 12 V1 1 14 V2 2 2 1 24 21 4 5 2 7 18 19 16 17 28 29 ϑ1 ϑ2 Operating mode ...

Страница 29: ... main burner Parameter 15 0 The flame simulation check is conducted after applying the start up signal ϑ during the waiting time tW Parameter 15 1 The flame simulation check is conducted provided no start up signal ϑ is applied during the so called start up position standby This allows fast start up of the burner since there is no waiting time tW The burner must have been switched off for at least...

Страница 30: ...he pause time After the pause time the burner is started if the start up signal ϑ is applied The minimum burner pause time tBP serves to adapt the pro gram sequence to the requirements of the application The time should be set such that the system can be moved to ignition position i e butterfly valves can be closed and pos sibly gas can be flared off before a restart occurs See examples of applica...

Страница 31: ... 03 00 t tFS 4 5 1 7 9 18 19 12 V1 14 V2 16 17 1 1 ϑ1 This indicates the safety time on start up tSA for the pilot burner Main burner Parameter 24 tSA1 tZ 04 06 07 08 02 03 00 t tFS1 tSA2 tFS2 9 12 V1 1 14 V2 2 ϑ1 ϑ2 2 1 24 21 88 4 5 2 7 18 19 16 17 28 29 This indicates the safety time on start up tSA for the main burner Parameters ...

Страница 32: ...U starts the next program step so as to give the flame time to stabilise Minimum combustion time t 5 5 3 B Parameter 20 Programmable time in the range from minimum safety time on start up tSA2 to maximum 25 s during which the main burner remains in operation In the case of brief activation of the start up signal input ϑ2 e g with a pulse the combustion time tB is started and the main burner remain...

Страница 33: ... must be specified when ordering 1 start up attempt Parameter 10 1 tSA tZ 88 02 00 t 4 5 1 7 9 18 19 12 V1 14 V2 16 17 02 ϑ1 If no flame forms during start up a fault lock out is performed after expiry of time tSA The display blinks and shows the cause of the fault 2 or 3 start up attempts Parameter 10 2 3 tSA1 tZ 88 02 00 t 4 5 1 7 9 18 19 12 V1 14 V2 16 17 tSA1 tZ ϑ1 If several start up attempts...

Страница 34: ...4 V2 2 2 16 17 1 24 21 06 88 4 5 1 7 18 19 28 29 ϑ1 ϑ2 If no flame forms during the start up of the main burner a fault lock out is performed after expiry of time tSA2 The display blinks and shows the cause of the fault 2 or 3 start up attempts Parameter 11 2 3 tSA2 tSA2 tSA2 tSA1 tZ 04 06 02 03 00 t tFS1 9 12 V1 1 14 V2 2 2 16 17 1 24 21 06 88 4 5 1 7 18 19 28 29 tW 06 06 05 05 tW ϑ1 ϑ2 If severa...

Страница 35: ... out or restart pilot burner 5 6 2 Parameter 12 This parameter determines whether the BCU starts a one off restart or performs an immediate fault lock out for the burner after an installation fault such as a flame failure or failure of air flow see also Project planning information Immediate fault lock out following flame failure 5 6 3 Parameter 12 0 Pilot burner fault lock out 04 t tSB 04 88 4 5 ...

Страница 36: ...er once If the burner does not function a fault lock out occurs The display blinks and shows the cause of the fault In accordance with EN 746 2 a restart may be conducted only if the safety of the installation is not impaired Restart is recommended for burners which occasionally display unstable behaviour during operation The precondition for a restart is that activation of the restart al lows the...

Страница 37: ...the safety time during operation tSB This in volves disconnecting the power from the gas valves and the ignition transformer The fault signalling contact closes the display blinks and shows the current program status see table Program status and fault messages After a fault lock out the burner control unit can be reset either with the button on the front panel or using an external button Several b...

Страница 38: ... once If the burner does not function a fault lock out occurs The display blinks and shows the cause of the fault In accordance with EN 746 2 a restart may be conducted only if the safety of the installation is not impaired Restart is recommended for burners which occasionally display unstable behaviour during operation The precondition for a restart is that activation of the restart al lows the b...

Страница 39: ...h valve V2 opens once the main burner has reached its operating position Low fire over run time tKN after a normal shut down Purge 5 7 1 In the case of multiple burner applications burners with me chanical combustion air supply are used The air for combus tion and pre purge is supplied by a central fan controlled by a separate logic This logic determines the purging time The BCU L supports central...

Страница 40: ... nally via input 23 Parameter 31 0 The air valve remains closed during start up even if it is activated externally These settings are required on burners on which the gas air ratio is controlled via a pneumatic link and which also need to be started at low fire e g on two stage controlled burners In this case activation of the air valve during burner start via input 23 must be prevented External c...

Страница 41: ... V1 1 14 V2 4 5 2 7 24 2 21 16 17 1 2 tSA1 tZ tFS1 A3 ϑ1 ϑ2 VAS VAS L UV BCU 480 L A P L1 1 2 VAS 1 ϑ Parameter 30 0 The air valve opens if it is activated exter nally via input 23 Parameter 31 1 The air valve can be activated even dur ing start up These settings may be selected only if the burner can start with full air capacity Parameters Air valve control on BCU L ...

Страница 42: ...tZ tFS1 03 ϑ1 ϑ2 VR R VAS BCU 480 L A P L1 1 2 SPS PLC CPE VAS 1 ϑ 1 2 Parameter 30 2 The air valve opens simultaneously with valve V1 Application Single stage controlled main burner is switched ON OFF via the ϑ input The air valve can be activated externally via input 23 for cool ing the burner in the start up position standby Parameters Air valve control on BCU L ...

Страница 43: ...2 VR R VAS BCU 480 L A P L1 1 2 SPS PLC CPE VAS 1 ϑ 1 2 Parameter 30 2 The air valve opens simultaneously with the operating signal Application Two stage controlled main burner is switched ON OFF via the ϑ input The air valve can be activated externally via input 23 for cool ing the burner in the start up position standby Parameters Air valve control on BCU L ...

Страница 44: ...g in during the closing time increases the O2 content in the combustion chamber Parameter 36 5 15 or 25 low fire over run time tKN 5 15 or 25 s The air valve closes slowly after the activation signal has been switched off The gas valve remains open for tKN This means that the burner after deactivation of the start up signal ϑ is initially adjusted down to low fire and then switched off completely ...

Страница 45: ...ther the air valve can be activated in the case of a fault lock out Parameter 32 0 The air valve is closed in the event of a fault It cannot be activated externally via terminal 23 Parameter 32 1 The air valve can be activated externally via input 23 even during a fault e g for cooling Parameters Air valve control on BCU L ...

Страница 46: ...riefly pressing the Reset Information button 1 s displays the relevant Manual mode step When the operating position is reached program status 4 Operation pilot burner or 8 Operation main burner the flame signal is indicated instead of the program parameter after approx 3 s If there is flame simulation during the start up the flame signal is displayed immediately On units with air valve control the...

Страница 47: ...nition capacity The safety time of the automatic burner control unit depends on the burner type the burner capacity and the respective application Burner with mechanical combustion air supply Burner capacity Calculating the safety time t 6 1 1 SA Natural draught burner with direct ignition Natural draught burner with pilot burner kW Safety time on start up tSA s 1 00 5 Ignition burner input rating...

Страница 48: ...7 5 20 33 8 Front film in English with additional stickers in D F I NL E GB Industrial plug connector P Digital input to interrupt the flame monitoring for intermittent operation D2 for continuous operation D3 Number of pilot burner start up attempts S2 3 Number of main burner start up attempts 2 3 Preparation for UV sensor for continuous operation UVD 1 U Additional signal distribution C For PROF...

Страница 49: ...ion cable the lower the ignition capacity Only use radio interference suppressed electrode adapters with 1 kΩ resistor for ignition electrodes see Accessories Do not lay UV ionisation cable and ignition cables together and lay them as far apart as possible Ionisation cable 7 2 3 Use unscreened high voltage cable see Accessories Ca ble length max 50 m Avoid external electrical interference Install ...

Страница 50: ...Limits 7 3 The limiters in the safety interlock linking of all the relevant safety control and switching equipment for the use of the ap plication e g safety temperature limiter minimum and maxi mum gas pressure tightness control must isolate terminal 5 from the voltage supply If the safety interlock is interrupted or if fuse F1 has tripped this is indicated by a blinking 51 on the display If the ...

Страница 51: ...remedied by changing the method of activation Burner start 7 5 4 A furnace start may only be initiated if it has been ensured using an appropriate procedure that there is no combustible mixture in the combustion processing chamber in the con nected areas or in the exhaust gas system heat exchanger dust collector This can be achieved by pre purge which oc curs immediately before ignition or within ...

Страница 52: ...tart ups per minute is limited for the BCU Excessive cycling triggers a fault message blinking 53 The max number of start ups per minute depends on the safety time tSA and the ignition transformer used tSA s Ignition transformer TZI Max start ups min 3 5 15 100 6 5 5 15 100 6 10 5 15 100 3 3 7 25 20 3 5 7 25 20 2 10 7 25 20 1 3 7 5 12 100 6 5 7 5 12 100 4 10 7 5 12 100 2 3 7 5 20 33 4 5 7 5 20 33 ...

Страница 53: ...ar with 4 self tapping screws enclosed Otherwise mount with external securing bars or fastening set see Accessories Wiring 7 9 Electrical connection via plug in connection terminals 2 5 mm2 and plug in cable glands The latter can be removed in order to facilitate installation The BCU is suitable for hard wiring only Do not reverse phase and neutral conductor Dif ferent phases of a three phase curr...

Страница 54: ...hich clos es at the same time as the air valve This can be used to activate a third gas valve V3 To do this the output of valve V1 or V2 must be used as auxiliary en ergy as a result of the required flame monitoring 25 N 26 27 50 51 V3 The opposite application describes a two stage controlled burner without pneumatic air gas ratio control system The third gas valve V3 and the air valve are activat...

Страница 55: ...safety interlocks and finally switch off the system Mains switch 7 12 The mains switch in the unit isolates the BCU on two poles from the mains It does not meet the requirements of EN 50156 1 2004 5 2 2 Switch disconnectors set out in chapter 5 for a device to disconnect the power supply Although the mains switch cannot be used for disconnecting from the electrical power supply in accordance with ...

Страница 56: ...rner is to burn permanently in the case of pilot and main burner monitoring The software package with PC opto adapter as well as Changed parameters stickers are available as accessories see section entitled Accessories The unit parameters set at the factory are specified in the enclosed delivery note Document changed parameters in BCSoft using the protocol function and enclose the protocol with th...

Страница 57: ...s This can be programmed using parameter 35 For further information see brochure UVS The burner control unit BCU U is prepared for UV sensor UVD 1 This enables continuous operation For further information see Technical Information Bulletin UVD Via the temperature in high temperature 8 3 equipment High temperature equipment is defined as a thermoprocessing installation in which the wall temperature...

Страница 58: ...ickers 9 4 D 49018 Osnabrück Germany Achtung geänderte Parameter Die Angaben auf dem Typenschild gelten nicht mehr in vollem Umfang Aktuelle Parameter direkt auslesen Important changed parameters The details on the type label are no longer completely accurate Read the current parameters direct from the unit Attention paramètres modifiés Les informations figurant sur la plaque signalétique ne sont ...

Страница 59: ...ning set 9 6 174 mm 230 mm 45 mm 1 77 6 85 9 1 Order No 74960422 Radiointerferencesuppressedelectrodeadapters 9 7 Plug cap 4 mm interference suppressed Order No 04115308 Straight adapter 4 mm interference suppressed Order No 04115307 Straight adapter 6 mm interference suppressed Order No 04115306 Accessories ...

Страница 60: ...rent Signal 1 typ 2 mA Power consumption approx 9 VA plus inherent consumption of the ignition transformer 50 60 Hz Power consumption of ignition transformer Type 230 V AC input 115 V AC input Output TZI 5 15 100 0 45 0 35 A 0 9 0 7 A 5 KV 15 11 mA TZI 7 25 20 1 1 0 8 A 2 2 1 6 A 7 KV 25 18 mA TZI 7 5 20 33 0 9 0 7 A 1 8 1 35 A 7 5 KV 20 15 mA TZI 7 5 12 100 0 6 0 45 A 1 2 0 9 A 7 5 KV 12 9 mA Val...

Страница 61: ...to IEC 127 2 5 Ambient temperature 20 to 60 C 4 to 140 F Climate no condensation permitted Enclosure IP 54 pursuant to IEC 529 Max number of operating cycles 1 000 000 Mains switch 1 000 Reset Information button 1 000 Input Output safety circuit All inputs outputs marked with see connection dia gram may be used for safety tasks Weight approx 5 kg 11 lb depending on version BCU B1 External fuse 12 ...

Страница 62: ...ds or 16 pin industrial plug connec tor for input signals and optionally pre assembled cables for output signals Operating controls 10 2 A Optical interface B Labelling field for individual labelling of the system com ponents C 2 digit 7 segment display D Mains switch to isolate the BCU on two poles from the mains E Reset Information button to reset the system after a fault or to scan parameters o...

Страница 63: ... pilot burner 2 Operating signal main burner Fault signal Reset Input signal Output signal Flame simulation check tW Waiting time 2 s tSA Safety time on start up 3 s 5 s or 10 s tSB Safety time during operation 1 s or 2 s tZ Ignition time 2 s 3 s or 6 s tLV Flame simulation delay time 25 s tFS Flame proving period 0 25 s tB Minimum combustion time tSA up to max 25 s tBP Minimum burner pause time 0...

Страница 64: ...tion time tZ then starts to elapse Voltage is supplied to the pilot gas valve V1 and the ignition transformer and the burner is ignited The duration of the ignition time is either 2 3 or 7 seconds depending on safety time tSA selected Flame simulation Flame simulation delay time t 12 4 LV t 1 14 4 5 9 6 L1 V1 V2 01 01 88 tW tLV 24 25 22 23 ϑ An extraneous signal flame simulation is a flame signal ...

Страница 65: ...mum gas pressure must isolate input from the voltage supply Pilot gas valve V1 12 9 The start fuel flow rate for the pilot burner is released by pilot gas valve V1 It opens when the safety time on start up tSA1 starts to elapse It remains open until the burner is switched off again by a normal shut down or fault lock out Main gas valve V2 12 10 The start fuel flow rate for the main burner is relea...

Страница 66: ...o answer Use To get to know the product To choose a product Planning To look for information My scope of functions Technical department Sales No answer Remarks Adobe Reader 7 or higher required Elster Kromschröder GmbH Postfach 2809 49018 Osnabrück Strotheweg 1 49504 Lotte Büren Germany T 49 541 1214 0 F 49 541 1214 370 info kromschroeder com www elster com www kromschroeder de The current address...

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