7 785 Burner Controls LOK6... LGK6... Burner controls For gs, oil or dul-fuel forced drft urners of medium to high cpcity With self-checking flme signl mplifier For continuously operting multistge or modulting oil or gs urners of medium to high cpcity With ir pressure supervision for checked ir dmper control. Burner control for oil urners to E 230: 2005 The LOK6.../LGK6... nd this Dt Sheet re intended for use y OEs which integrte the urner controls in their products. 06.03.202 Infrstructure & Cities Sector
Use Burner controls type LOK6.../LGK6... feture self-checking flme supervision circuit. The supervision circuit initites the required sfety ctions not only in the cse of premture or missing flme signls, ut lso in the event of ny kind of fult on the flme detector, the detector cles or the flme signl mplifier tht could simulte flme signl during urner opertion. The urner controls re therefore suited for use in ll types of oil- or gs-fired comustion plnt where self-checking flme supervision systems re either mndtory or recommended. For exmple: - Burners tht operte continuously - Burners in intermittent opertion tht, in the cse of gret het demnd, my operte continuously for more thn 4 hours, e.g. in plnt using oiler sequencing - Burners tht need to comply with the Germn TRD 4 nd TRD 42 regultions for stem oilers - Burners in plnt where, for specific sfety requirements, supervision of the urner y self-checking flme supervision system seems dvisle - The control sequence nd connection circuitry of the LOK6 /LGK6 urner controls re identicl to those of the LAL2... nd LFL... respectively (with the exception of the LFL.48), so tht existing comustion plnt cn lso e equipped with self-checking urner controls, provided very good flme detector current vlues re mesured in the plnt supervised so fr y the LFL..., nd provided the following types of flme detectors re either instlled or cn susequently e fitted: Flme supervision when using LOK6... Flme supervision when using LGK6... - Silicon photocell detector RAR9... - Flme detector QRA53.../QRA55... - Ioniztion proe - Flme detector QRA53.../QRA55... together with ioniztion proe, e.g. in the cse of urners using pilot urner (lso see Dt Sheet 772) 2/24 Infrstructure & Cities Sector 06.03.202
Wrning notes To void injury to persons, dmge to property or the environment, the following wrning notes must e oserved! Do not open, interfere with or modify the unit! All ctivities (mounting, instlltion nd service work, etc.) must e performed y qulified stff Before mking ny wiring chnges in the connection re, completely isolte the plnt from mins supply (ll-polr disconnection). Ensure tht the plnt cnnot e indvertently switched on gin nd tht it is indeed ded. If not oserved, there is risk of electric shock hzrd Ensure protection ginst electric shock hzrd y providing dequte protection for the urner control s connection terminls Ech time work hs een crried out (mounting, instlltion, service work, etc.), check to ensure tht wiring is in n orderly stte nd mke the sfety checks s descried in Commissioning notes Press the lockout reset utton only mnully (pplying force of no more thn 0 ) without using ny tools or pointed ojects Do not press the lockout reset utton on the unit or the remote reset utton (input 2) for more thn 0 seconds, since this would dmge the lockout rely inside the unit Fll or shock cn dversely ffect the sfety functions. Such units must not e put into opertion, even if they do not exhiit ny dmge ounting notes Upgrding existing plnt Ensure tht the relevnt ntionl sfety regultions re complied with. When converting plnt to LOK6... or LGK6..., the existing LAL... or LFL... se must e secured y cylinder-shped grooved pin, thus ensuring tht only n LOK6... or LGK6... type urner control cn e fitted. Prt numer of grooved pin: 4 66 8024 0 Loction of grooved pin: Between terminls 0 nd of the LAL... se, nd etween terminls 4 nd 5 of the LFL... se. Strt repetition in the event of loss of flme By removing link (B) on the underside of the unit, the LOK6... cn e switched to strt repetition in the event of loss of flme during opertion. In tht cse, the wire link must e cut off completely. However, it must e checked whether this is in complince with ntionl stndrds nd regultions. Instlltion notes Alwys run the high-voltge ignition cles seprtely while oserving the gretest possile distnce to the unit nd to other cles eutrl conductors must not e interchnged Instll switches, fuses, erthing, etc., in complince with locl regultions ke certin tht the mximum permissile current rting of the connection terminls will not e exceeded 3/24 Infrstructure & Cities Sector 06.03.202
Electricl connection of flme detectors It is importnt to chieve prcticlly disturnce- nd loss-free signl trnsmission: ever run the detector cle together with other cles Line cpcitnce reduces the mgnitude of the flme signl Use seprte cle Oserve the permissile detector cle lengths (see Technicl dt) It is not permitted to connect 2 flme detectors QRA53.../QRA55... in prllel When using the QRA53.../QRA55..., erthing of terminl 22 is mndtory The ioniztion proe is not protected ginst electric shock hzrd Locte the ignition electrode nd ioniztion proe such tht the ignition sprk cnnot rc over to the ioniztion proe (risk of electricl overlods) nd tht it cnnot dversely ffect the supervision of ioniztion Supervision with ioniztion proe nd QRA flme detector is possile ut, for sfety resons, oth must not e ctive t the sme time, with the exception of the second sfety time (t9). At the end of the second sfety time, one of the detected flmes must extinguish, e.g. y shutting down the pilot gs vlve connected to terminl 7 Commissioning notes When commissioning the plnt or when doing mintennce work, mke the following sfety checks: Sfety check to e crried out ) Burner strtup with flme detector drkened ) Burner strtup with simulted flme c) Burner opertion with simulted loss of flme; for tht purpose, drken the flme detector in opertion nd leve it in tht stte d) Burner strtup with response of ir pressure switch e) Burner opertion with simulted ir pressure filure Anticipted response Lockout t the end of sfety time Lockout fter no more thn 40 seconds LOK6... with wire link cut: Strt repetition followed y lockout t the end of sfety time LGK6... nd LOK6... with wire link closed: Immedite lockout Prevention of strtup/lockout during prepurge time Immedite lockout 4/24 Infrstructure & Cities Sector 06.03.202
Stndrds nd certifictes Conformity to EEC directives - Electromgnetic comptiility EC (immunity) - Low-voltge directive - Directive for gs pplinces - Directive for pressure devices 2004/08/EC 2006/95/EC 2009/42/EC 97/23/EC ISO 900: 200 Cert. 00739 ISO 400: 200 Cert. 38233 Identifiction code to E 230/E 298 F B/ L L X K Certified with plug-in se nd flme detector: Type reference LOK6.40... --- --- --- LOK6.250... --- --- --- LOK6.650... --- --- --- LGK6.22... --- --- --- LGK6.33A7 --- --- --- --- --- LGK6.33A27 --- --- --- LGK6.322... --- --- --- LGK6.333... --- --- --- LGK6.335... --- --- --- LGK6.622... --- --- --- LGK6.635... --- --- --- Service notes The KF8832 flme detector current mesuring device must not e used in continuous opertion Life cycle Burner controls hs designed lifetime* of 250,000 urner strtup cycles which, under norml operting conditions in heting mode, correspond to pprox. 0 yers of usge (strting from the production dte given on the type field). This lifetime is sed on the endurnce tests specified in stndrd E 230/E 298 nd the tle contining the relevnt test documenttion s pulished y the Europen Assocition of Component nufcturers (Afecor) (www.fecor.org). The designed lifetime is sed on use of the urner controls ccording to the mnufcturer s Dt Sheet. After reching the designed lifetime in terms of the numer of urner strtup cycles, or the respective time of usge, the urner control is to e replced y uthorized personnel. * The designed lifetime is not the wrrnty time specified in the Terms of Delivery Disposl notes The unit contins electricl nd electronic components nd must not e disposed of together with household wste. Locl nd currently vlid legisltion must e oserved. 5/24 Infrstructure & Cities Sector 06.03.202
echnicl design LGK6.../LOK6... Housing - Plug-in design - Exchngele unit fuse (including spre fuse) - de of impct-proof nd het-resistnt lck plstic - Lockout reset utton with viewing window; locted ehind it re: - The lockout wrning lmp - The lockout indictor - coupled to the spindle of the sequence switch - visile in the trnsprent lockout reset utton - uses esy-to-rememer symols to indicte the type of fult nd the point in time lockout occurred 6/24 Infrstructure & Cities Sector 06.03.202
Type summry Switching times re given in the order of the strtup sequence, vlid for 50 Hz mins frequency. At 60 Hz, the times re out 20% shorter. The type references pply to urner controls operting on AC 230 V, 50...60 Hz. * For urner controls operting on AC 00...0 V, 50...60 Hz, the lst 2 digits of the type reference red «7» in plce of «27». LOK6... For flme supervision with silicon photocell detector RAR9... for oil urners Preferred use: Flsh-stem genertors Universl ppliction edium- or hevy-oil urners LOK6.40A27* LOK6.250A27* LOK6.650A27 Legend of times t 0 s 22 s 66 s Prepurge time with ir dmper fully open TSA 4 s 5 s 5 s Sfety time or first sfety time with urners using pilot urner TSA --- --- --- Sfety time or first sfety time with urners using pilot urner t3 2 s 2.5 s 2.5 s Preignition time t3 From strtup commnd (with ir pressure supervision: from receipt of ir pressure signl) Long preignition time t3n 0 s 5 s 5 s Postignition time (ignition trnsformer connected to terminl 5) t4 8 s 7.5 s 7.5 s Intervl etween strt of sfety time nd relese of vlve t terminl 9 t4 --- --- --- Intervl etween strt of sfety time nd relese of vlve t terminl 9 t5 4 s 7.5 s 7.5 s Intervl etween end of intervl (t4/t4 ) nd relese of lod controller or vlve t terminl 20 t6 0 s 5 s 5 s Postpurge time (identicl to permissile fterurn time (t3)) t7 2 s 2.5 s 2.5 s Switch-on dely of fn motor (2) t8 30 s 47 s 9 s Durtion of strtup without «t» nd «t2» t9 --- --- --- Second sfety time with urners using pilot urner t0 6 s 0 s 0 s Intervl from strtup to the eginning of the ir pressure check t Optionl Air dmper running time to the fully open position t2 Optionl Air dmper running time to the low-fire position t3 0 s 5 s 5 s Permissile fterurn time t6 4 s 5 s 5 s Intervl from strtup to the open commnd for the ir dmper t20 32 s 34.5 s 2.5 s Intervl to self-shutdown of the sequence switch LGK6... For flme supervision with flme detector QRA53.../QRA55... or ioniztion proe Preferred use: Flsh-stem genertors Flsh-stem genertors D (lso suited for direct-fired ir heters), F D, A GB F, I B, L LGK6.22A27* LGK6.33A27 LGK6.322A27* LGK6.333A27* LGK6.335A27* LGK6.622A27* LGK6.635A27* t 0 s 9 s 35.5 s 3.5 s 37 s 65 s 66 s TSA 2 s 3 s 2 s 3 s 2.5 s 2 s 2.5 s TSA 2 s 3 s 2 s 3 s 5 s 2 s 5 s t3 4 s 3 s 4 s 6 s 5 s 4 s 5 s t3 4 s --- 4 s 6 s 2.5 s 4 s 2.5 s t3n --- --- --- --- --- --- --- t4 6 s 6 s 0 s.5 s 2.5 s 0 s 2.5 s t4 6 s --- 0 s.5 s 5 s 0 s 5 s t5 4 s 3 s 0 s.5 s 2.5 s 0 s 2.5 s t6 0 s 4.5 s 2 s 7 s 5 s 2 s 5 s t7 2 s 3 s 2 s 3 s 2.5 s 2 s 2.5 s t8 30 s 29 s 65 s 69 s 74 s 95 s 03 s t9 2 s 3 s 2 s 3 s 5 s 2 s 5 s t0 6 s 6 s 8 s.5 s 0 s 8 s 0 s t Optionl t2 Optionl t3 0 s 4.5 s 2 s 7 s 5 s 2 s 5 s t6 4 s 3 s 4 s 6 s 5 s 4 s 5 s t20 32 s 60 s --- 26 s 22 s --- --- 7/24 Infrstructure & Cities Sector 06.03.202
Ordering Oil urner controls, without plug-in se (plug-in se not included in delivery, must e ordered s seprte item) For AC 230 V* Control sequence nd Preferred use connection digrm like LOK6.40A27* LAL2.4 Flsh-stem genertors LOK6.250A27* LAL2.25 Universl ppliction LOK6.650A27 LAL2.65 Hevy-oil urners * For urner controls operting on AC 00...0 V, 50...60 Hz, the lst 2 digits of the type reference red «7» in plce of «27» Connection ccessories for medium-cpcity urner controls see Dt Sheet 7230 - Plug-in se AG6 with Pg thred for cle entry glnds - Plug-in se AG6. with 6 thred for cle entry glnds Flme detectors - Silicon photocell detectors RAR9... see Dt Sheet 773 Gs urner controls, without plug-in se (plug-in se not included in delivery, must e ordered s seprte item) For AC 230 V* Control sequence nd Preferred use connection digrm like LGK6.22A27* LFL.22 Flsh-stem genertors LGK6.33A27 LFL.33 Flsh-stem genertors LGK6.322A27* LFL.322 D (lso suited for direct-fired ir heters), F LGK6.333A27* LFL.333 D, A LGK6.335A27* LFL.335 GB LGK6.622A27* LFL.622 I, F LGK6.635A27* LFL.635 B, L * For urner controls operting on AC 00...0 V, 50...60 Hz, the lst 2 digits of the type reference red «7» in plce of «27» Connection ccessories for medium-cpcity urner controls see Dt Sheet 7230 - Plug-in se AG7 with Pg thred for cle entry glnds - Plug-in se AG7. with 6 thred for cle entry glnds Flme detectors - Flme detectors QRA53.../QRA55... see Dt Sheet 772 - Ioniztion proe to e supplied y thirds Flme detector current mesuring device KF8832 - For detector current mesurements with QRA53..., QRA55..., recommended up to series C nd E - ot suited for continuous opertion - Only for mesurements of short durtion - The KF8832 negtes the self-supervision function 8/24 Infrstructure & Cities Sector 06.03.202
Technicl dt Generl unit dt LOK6.../LGK6... Environmentl conditions ins voltge AC 220 V -5%...AC 240 V +0% AC 00 V -5%...AC 0 V +0% ins frequency 50...60 Hz ±6% Unit fuse T6,3H250V to DI E 60 27 Primry fuse (externl) x. 6 A (slow) Weight Approx. 000 g Power consumption Approx. 3.5 VA Perm. mounting position Optionl Degree of protection IP40, (to e ensured through mounting) with the exception of the connection re (terminl se) Sfety clss II Perm. input current t terminl x. 5 A to VDE 0660 AC3 Perm. current lod of control terminls x. 4 A to VDE 0660 AC3 Required switching cpcity of switching devices - Between terminls 4 nd 5, 4 nd 2 - Between terminls 4 nd 4 Storge DI E 6072-3- Climtic conditions Clss K3 echnicl conditions Clss 2 Temperture rnge -20...+60 C Humidity <95% r.h. Trnsport DI E 6072-3-2 Climtic conditions Clss 2K3 echnicl conditions Clss 22 Temperture rnge -20...+60 C Humidity <95% r.h. Opertion DI E 6072-3-3 Climtic conditions Clss 3K3 echnicl conditions Clss 33 Temperture rnge -20...+60 C Humidity <95% r.h. A, AC 250 V depending on loding of terminls 5, 6, 8, 9 (LGK6...: 6...9), min. A, AC 250 V Cution! Condenstion, formtion of ice nd ingress of wter re not permitted! 9/24 Infrstructure & Cities Sector 06.03.202
Technicl dt (cont d) Flme supervision LOK6... LGK6... RAR9... QRA5x.C... QRA5x.D... Ioniztion proe QRA5x.E... QRA5x.G... Operting voltge (Terminl 23 or 24) <DC V ±0% AC 280 V ¹) ±0% AC 280 V ¹) ±0% AC 245 V ¹) ±0% inimum detector current required DC 6 µa DC 35 µa DC 20 µa DC 2 µa ximum possile detector current DC 38 µa DC 50 µa DC 270 µa DC 00 µa Short-circuit current --- --- --- Approx. AC 300 µa ximum length of detector cle (lid seprtely) 00 m ²) ²) 60 m ³) ) AC voltge, mesured with no detector current t AC 230 V mins voltge. Internl resistnce of mesuring instrument 0. The shutter of the flme detector QRA53.../QRA55... is powered y mins voltge 2) Detector cle lid in minimum distnce of 5 cm from other mins crrying cle: - As multiple cle x. 50 m - With 5 single wires x. 70 m With shielded 3-core control cle to terminls 3, 4 nd 5 of the flme x. 5 m detector QRA53.../QRA55... nd stndrd mins cle to terminls nd 2 With 2 shielded single-core coxil cles (45 pf/m, e.g. RG 62) to terminls 3 nd 4 of the flme detector QRA53.../QRA55... nd stndrd mins cle to terminls, 2 nd 5 x. 60 m If possile, shielding should e erthed t oth ends 3) Longer cle distnces re permitted when connecting low-cpcitnce detector cles to terminl 24 of the urner control (especilly ginst erthed wires!) 0/24 Infrstructure & Cities Sector 06.03.202
Detector current mesurement LOK6.../RAR9... The mesuring device must e connected etween the detector nd terminl 22 (+pole to terminl 22). With RAR9... DC 6...38 µa 22 + A RAR9... 24 + 7785v02/008 LGK6.../QRA53.../ QRA55... Use the KF8832 mesuring device (not suited for continuous opertion). There is no self-checking while mesurements re mde. The KF8832 is not required when using the QRA5x.D.../QRA5x.G... With QRA5x.C.../QRA5x.E... With QRA5x.D.../QRA5x.G... 22 DC 35...50 µa + A 7785v04/008 22 DC 20...270 µa + A 7785v0/008 + + 470 µf/25 V 470 µf/25 V /24 Infrstructure & Cities Sector 06.03.202
Detector current mesurement (cont d)) LGK6.../ioniztion proe The mesuring device must e connected etween terminl 24 nd the detector electrode (+pole to terminl 24). With ioniztion 24 DC 2...00 µa + IO A 7785v03/008 Burner Burner control LGK6... se 2 22 2 5 Terminls in the control pnel 2 ins cle 3 x.5 mm 2 5 Terminls in the urner comprtment 2 5 QRA5... 23 5 3 4 Single-wire coxil cle (e.g. RG62) Shielding 3 4 3 4 Cle AG9 x. 60 m 7785g0e/0604 Legend A RAR9... IO Ammeter Silicon photocell detector Ioniztion proe 2/24 Infrstructure & Cities Sector 06.03.202
Function Principle of self-supervision Prerequisites for urner strtup In contrst to conventionl mplifiers, the signl delivered y the flme detector is hndled dynmiclly nd not stticlly. The flme detector signl is converted to sequence of control pulses nd then fed to the flme rely circuit. The ltter is designed such tht the flme rely cn only e energized y flme signl of the descried form. If the pulses chnge due to fulty detector or fulty detector cles, the rely will e deenergized nd the urner control triggers the required sfety ctions. In the cse of UV supervision, it must lso e ensured tht self-ignition of the UV tue (e.g. due to ging) does not simulte flme signl. For tht reson, incident rdition t the UV cell is periodiclly interrupted y shutter. In ddition to the self-checking fcility, the flme signl circuit is sujected to functionl test during the prepurge time. If it does not operte correctly, the strtup sequence will e orted or lockout initited. Furthermore, if mins voltge drops to level where sfe opertion of the urner control is no longer ensured, the urner will utomticlly shut down. When mins voltge returns to the norml level, the urner control repets the strtup sequence. If the detector signls re only slightly ove the minimum levels, such mins voltge fluctutions cn lso give rise to urner lockout however. - The urner control is reset nd in the strt position (terminls nd 2 must receive power) - The ir dmper is closed. End switch (z) for the fully closed position must feed power from terminl to terminl 8 - All control contcts etween terminls 2 nd 5 (limit thermostt, control thermostt, etc.) must e closed A Strt When control thermostt or pressurestt closes, the urner control s sequence switch strts running. At the sme time, the fn motor connected to terminl 6 (only prepurging) receives power nd, on completion of switch-on dely time, the fn motor or flue gs fn t terminl 7 (pre- nd postpurging) lso receives power. On completion of intervl (t6), the control commnd to open the ir dmper is given vi terminl 9. During the running time of the motor, the sequence switch does not operte, s terminl 8, vi which the motor of the sequence switch first receives power, is not live during tht period of time. The sequence switch strts gin nd progrms only fter the ir dmper is fully open nd end switch () hs chnged over to feed power to terminl 8. t Prepurge time with ir dmper fully open (nominl mount of comustion ir) Shortly fter the strt of the prepurge time, ir pressure switch must chnge over, thus interrupting the current pth etween terminls 4 nd 3. Otherwise, the urner control would go to lockout (strt of ir pressure check). At the sme time, terminl 4 must e live since this current pth is used to power the ignition trnsformer nd the fuel vlves. t3 With the LOK6, n ignition trnsformer connected to terminl 5 is therefore switched on t this point in time (long preignition). If there is no ir pressure switch, the ignition trnsformer receives power lredy with the strt commnd. On completion of the prepurge time, the urner control vi terminl 0 drives the ir dmper into the lowfire position, which is determined y the chngeover point of uxiliry switch (m). During the positioning time, the sequence switch stops gin until terminl 8 receives power from «m». t5 Intervl On completion of intervl (t5), terminl 20 receives power. At the sme time, control outputs 9 to nd input 8 re glvniclly seprted from the unit s control section, so tht the ltter is protected ginst reverse voltges from the lod control circuit. The strtup sequence of the urner control ends with the relese of lod controller t terminl 20. The sequence switch switches itself utomticlly off, depending on the time vrint used, either immeditely or fter some so-clled idle steps, tht is, without chnging the contct positions. 3/24 Infrstructure & Cities Sector 06.03.202
Function (cont d) Expnding flme urners with LOK6... or LGK6... t3 Short preignition time; followed y fuel relese vi terminl 8. TSA Sfety time (prt lod) On completion of the sfety time ltest, flme signl must e present t the input of the flme signl mplifier, or else the urner control will initite lockout. Only with LOK6...: t3n Postignition time (provided the ignition trnsformer is connected to terminl 5). t4 Intervl until the fuel vlve is relesed vi terminl 9. Interrupted pilot urner with LGK6... (Burners using pilot urner) t3/t3 Short preignition time; followed y relese of fuel for the pilot urner vi terminl 7. TSA/TSA First sfety time (ignition lod) On completion of the sfety time ltest, flme signl must e present t the input of the flme signl mplifier, or else the urner control will initite lockout. t4/t4 Intervl until the fuel vlve t terminl 9 is relesed (strt lod of the min urner).times sfety time (TSA ), short preignition time (t3 ) nd intervl (t4 ) re only progrmmed y urner controls type LGK6.335... nd LGK6.635... t9 Second sfety time On completion of the sfety time, the min urner must hve een ignited y the pilot urner, since the pilot gs vlve is closed on completion of second sfety time (t9). B Operting position of the urner B-C Burner opertion (genertion of het) During urner opertion, the lod controller drives the ir dmper to the nominl lod or low-fire position, depending on het demnd. Here, the nominl lod is relesed y uxiliry switch (v) in the ctutor. C Controlled shutdown y control thermostt or pressurestt In the cse of controlled shutdown, the fuel vlves re immeditely closed nd, t the sme time, the sequence switch strts gin to progrm the postpurge time (t6). t6 Postpurge time (postpurging with fn (2) connected to terminl 7). Shortly fter the strt of the postpurge time, voltge t terminl 0 is reinstted, so tht the ir dmper is driven into the I position. The full closing of the ir dmper strts only shortly efore the completion of the postpurge time initited y the control signl on terminl, which lso remins live during the following urner off period. t3 Permissile fterurn time During permissile fterurn time (t3), the flme signl input my still receive flme signl o lockout D-A End of control sequence (= strt position) When, on completion of postpurge time (t6), the sequence switch hs reset the control contcts to their strt positions, therey switching itself off, the detector nd flme simultion test is strted gin. However, during the urner off period, lockout cn occur only if the fulty flme signl lsts few seconds. Hence, short ignition pulses of the UV detector cused y cosmic rdition do not initite lockout. 4/24 Infrstructure & Cities Sector 06.03.202
Control sequence in the event of fult nd indiction of lockout In cse of ny disturnce, the supply of fuel will immeditely e interrupted. At the sme time, the sequence switch stops nd thus the lockout indictor lso. The symol ppering ove the reding mrk indictes the kind of fult: o strt, ecuse one of the contcts is not closed (lso see Prerequisites for urner strtup) or lockout during or fter completion of the control sequence due to extrneous light (e.g. flme not extinguished, leking fuel vlves, fulty flme supervision circuit, or similr). Aortion of strtup sequence, ecuse end switch () hs not fed the OPE signl to terminl 8. Terminls 6, 7 nd 4 nd, in cse LOK6... is used, terminl 5, lso remin live until the fult is corrected. P Lockout, ecuse the ir pressure signl hs not een received t the strt of the ir pressure check. Ech ir pressure filure fter this time initite lso lockout. Lockout due to fult in the flme supervision circuit. Aortion of strtup sequence, ecuse uxiliry switch (m) hs not delivered the positioning signl for the low-fire position to terminl 8. Terminls 6, 7 nd 4 nd, in cse LOK6... is used, terminl 5, lso remin live until the fult is corrected. Lockout, ecuse no flme signl hs een received on completion of the (first) sfety time. 2 Only with LGK6...: Lockout, ecuse no flme signl hs een received on completion of the second sfety time (flme signl of the min flme with interrupted pilot urners). I Lockout, ecuse the flme signl hs een lost during urner opertion or ir pressure filure hs occurred. Only with LOK6...: If wire link (B) ws cut off nd the flme is lost during urner opertion, the urner control progrms repetition of the strtup sequence with the full progrm. 5/24 Infrstructure & Cities Sector 06.03.202
Control sequence in the event of fult nd indiction of lockout (cont d) Lockout indiction P P P 2 2 LOK6.40... LOK6.250... LOK6.650... LGK6.22... LGK6.33... LGK6.322... LGK6.333... LGK6.622... P P 2 2 7785p02/0296 LGK6.335... LGK6.635... - - ( )- Strtup sequence With certin time vrints: Idle steps of the sequence switch up to the self-shutdown fter urner strtup ( = operting position of the sequence switch) Postpurge sequence fter controlled shutdown. In strt position (), the sequence switch switches itself utomticlly off or immeditely initites nother urner strtup (e.g. fter fult hs een corrected) Durtion of sfety time with expnding flme urners Durtion of sfety times with interrupted pilot urners When lockout hs occurred, the urner control cn immeditely e reset. After resetting, nd lso fter correction of fult, which resulted in shutdown, or fter mins filure, the sequence switch lwys runs to its strt position, wherey only terminls 7, 9, 0 nd receive power in ccordnce with the control sequence. It is only then tht the urner control progrms urner restrt. ote! Do not press the lockout reset utton for more thn 0 seconds. 6/24 Infrstructure & Cities Sector 06.03.202
Connection digrms (for circuitry vrints, see Connection exmples) LOK6... A z m AS 2 2 t0 P B C D 3 A 3 2 4 t7 t6 4 5 6 7 t3 t3n t3 TSA 5 6 7 8 t4 t5 t2 t t t6 9 20 9 0 8 22 t3 24 SB H (3) EK2 AL LP W R SA LR v z m B + RAR9... Si L 2 Z BV BV2 BV3 LK 77850/0908 LGK6... Cution! Do not press lockout reset utton (EK...) for more thn 0 seconds! A z m Bt0 P t7 t3 TSA t9 t4 TSA t3 t5 t4 t5 t2 t t6 t 2 C D 2 2 A 3 3 2 4 4 5 SB (3) v... W GP AS R H EK2 Si L AL LP 6 7 6 7 8 9 20 9 d t6 2 d2 Z ZBV BV BV2 BV 778502e/0604 LR SA v BV3 LK BV2 z 0 8 22 23 5 m TSA, t3, t4, only: LGK6.335 nd LGK6.635 t3 2 5 + 34 QRA5... ) 22 24 IO Cution! Do not press lockout reset utton (EK...) for more thn 0 seconds! ) When used in connection with QRA53.../QRA55..., erthing of terminl 22 is mndtory! 7/24 Infrstructure & Cities Sector 06.03.202
Legend AL AR AS B BR BV... v... d... EK... IO FR FS GP H L... LK LP LR m... TC QRA... R RAR9... SA SB Si S v V W z Z ZBV A B C D Chngeover end switch for ir dmper s fully open position Remote lockout wrning device (lrm) in rely (lod rely) with «r» contcts Unit fuse Wire link (on the urner control s se) Lockout rely with «r» contcts Fuel vlve Auxiliry contct in the vlve ctutor for the fully closed position check Contctor or rely Lockout reset utton Ioniztion proe Flme rely with «fr» contcts Flme signl Gs pressure switch ins isoltor Lockout wrning lmp Air dmper Air pressure switch Lod controller Auxiliry chngeover switch for the ir dmper s I position Fn or urner motor Resistor with negtive temperture coefficient UV detector Control thermostt or pressurestt Silicon photocell detector Actutor of ir dmper Sfety limit thermostt Externl fuse Synchronous motor of sequence switch In the ctutor: Auxiliry chngeover switch for relese of fuel s function of the ir dmper position Flme signl mplifier Limit thermostt or pressure switch In the ctutor: End switch for the ir dmper s fully closed position Ignition trnsformer Pilot vlve Vlid for expnding flme urners Vlid for interrupted pilot urners with pilot urner which is shut down fter the min urner hs ignited Strtup Operting position Controlled shutdown End of control sequence Control signls delivered y the urner control Permissile input signls Required input signls: If these signls re not present t the points in time mrked y symols or during the shded periods of time, the urner control will interrupt the strtup sequence or initite lockout Lockout indiction positions when there is no input signl (see Control sequence in the event of fults): o strt Aortion of strtup sequence Aortion of strtup sequence Lockout (fult in the flme supervision circuit) Lockout (no flme) 2 Lockout (no flme) P Lockout (no ir pressure) 8/24 Infrstructure & Cities Sector 06.03.202
Legend (cont'd) Time tle t Prepurge time with ir dmper fully open TSA Sfety time or first sfety time with urners using pilot urner TSA Sfety time or first sfety time with urners using pilot urner t3 Preignition time t3 Preignition time t3n Postignition time (ignition trnsformer connected to terminl 5) t4 Intervl etween the strt of sfety time (TSA/TSA ) to the vlve connected to terminl 9 t4 Intervl from the strt of sfety time (TSA/TSA ) to the relese of the vlve connected to terminl 9 t5 Intervl from the end of intervl (t4/t4 ) to the relese of the lod controller or vlve t terminl 20 t6 Postpurge time (identicl with the permissile fterurn time (t3)) t7 Switch-on dely for fn motor 2 t8 Durtion of strtup sequence excluding running time (t/t2) t9 Second sfety time with urners using pilot urner t0 Intervl from the strt to the eginning of the ir pressure check t Running time of ir dmper into the fully open position t2 Running time of ir dmper into the low-fire position t3 Permissile fterurn time t6 Intervl from the strt to the OPE commnd for the ir dmper t20 Intervl to the self-shutdown of the sequence switch mx. Sfety time in the event of loss of flme during opertion * Times sfety time (TSA ), long preignition time (t3 ) nd intervl (t4 ) re only progrmmed y urner controls LGK6.335... nd LGK6.635... 9/24 Infrstructure & Cities Sector 06.03.202
Connection digrms LGK6... SB EK L AS r r I XV 4 2 W GP R LP 5 3 4 fr IV XIII XII AR d/d2 r2 E A BR II X 6 r2 d TC VIII 2 7 d2 fr2 VI V fr3 III IO 22 24 5 23 5 4 3 22 24 5 23 V VII r3 XIV S QRA5... ) 2 L Si H 3 2 2 6 AL EK2 (3) Z 7 8 9 20 9 0 8 LR ZBV BV BV2 BV SA v z m BV3 BV2 LK 778506/0305 Cution! Do not press lockout reset utton (EK...) for more thn 0 seconds! ) When used in connection with QRA53.../QRA55..., erthing of terminl 22 is mndtory! LOK6... AS r **I XV r r2 RAR9... + 22 23 24 SB EK L 4 2 6 7 W 2 B R LP fr 5 3 4 fr2 TC IX XII XI XIII IV II X AR r2 E BR A V V FR fr3 VI III XIV VII r3 VIII S 3 2 2 (3) 5 6 8 9 9 LR 20 0 7 8 L Si H AL EK2 Z BV BV2 SA v z m BV3 778507/0908 L Cution! Do not press lockout reset utton (EK...) for more thn 0 seconds! 20/24 Infrstructure & Cities Sector 06.03.202
Progrm sequence LGK6... I II III IV V VI VII VIII IX X t7 A t6 t t t2 t3 t4 TSA *t3 *t4 *TSA t5 t9 B C D t6 t20 Control output t terminl: 2 9 0 9 20 8 7 7 6 9 8 XI XII XIII XIV t0 t3 XV 2 7 t8 7785d03e/0805 Lockout indiction position P 2 * Times sfety time (TSA ), long preignition time (t3 ) nd intervl (t4 ) re only progrmmed y urner controls LGK6.335... nd LGK6.635... LOK6... I t7 II III IV V VI VII VIII IX X XI XII XIII XIV A t6 t t0 t t3 t2 t3 TSA t4 t3n t5 B C D t6 t20 t3 Control output t terminl: 2 9 0 5 9 20 7 8 7 6 9 8 XV t8 7785d04e/0604 Lockout indiction position P 2/24 Infrstructure & Cities Sector 06.03.202
Connection exmples LGK6... 6 7 8 9 BV2 Douling of sfety time with expnding flme urners when using urner control LGK6.335... or LGK6.635... Z BV 778503/295 By connecting terminls 7 nd 8, the sfety time is douled nd the preignition time reduced y 50%. Before using this circuit, it must e ensured tht the longer sfety time is in complince with ntionl stndrds nd regultions! LOK6... 8 9 7 9 20 0 8 LR 6 Control of the ctutor during opertion y feeding control signls to terminl 7 BV BV2 LK 778509/0396 3 2 4 4 5 6 Wiring required for opertion without ir pressure supervision d/d2 R W d If n uxiliry contct of the fn contctor is included in the circuit s shown in the digrm, ignition nd fuel relese re possile only when the contct is closed. 7785/096 LOK6.../LGK6... 3 AL L3 2 3 4 4 5 I W GP LP 778505/295 0 Semiutomtic strtup The urner is switched on mnully y pressing utton I. Then, the urner control progrms the strtup sequence nd flme supervision. The urner is switched off mnully y pressing utton 0, or utomticlly y the limit thermostt or pressure switch (W), or y gs pressure switch (GP). Signl lmp (L3) indictes when the urner control is redy to e strted; it extinguishes shortly fter the urner is switched on. For the other connections, see to the connection digrms. SA BV2 9 20 9 LR 0 8 v z 778508/096 LK Connection of ctutors without chngeover end switch for the fully closed position. Switch (Z) is set to low-fire 9 20 9 0 8 6 BV2 BV3 77850/0396 Control of fuel vlve y terminl 20 in the cse of urners without ir dmper or with n ir dmper not controlled y the urner control. The rely is not required if the vlve connected to terminl 20 is hydruliclly series-connected to vlve controlled y terminl 8 or 9. If no ctutor is used, terminl 8 must e connected to terminl 6. 22/24 Infrstructure & Cities Sector 06.03.202
Progrm sequence Expnding flme urners (urners without pilot urner), controlled nd supervised y LOK6... or LGK6... Air dmper in low-fire position during urner off times (min.). T P ~ R R 2 Z BV LR 00% min. LK 0... A B C D t7 t t6 t3 TSA t4 t5 BV2 t t2 FS 7785d0/090 Interrupted pilot urners (urners with pilot urner), controlled nd supervised y LGK6.335 or LGK6.635, for exmple. The other types of urner controls of the LGK6... rnge progrm the times sfety time (TSA), preignition time (t3), intervl (t4) nd second sfety time (t9) for the pilot urner. T P ~ R 2 Z ZBV BV A B C D t7 t t6 t3 TSA t4 t9 R LR 00% min. LK 0... t5 BV2 t t2 FS 7785d02/00 23/24 Infrstructure & Cities Sector 06.03.202
Dimensions Dimensions in mm LOK6.../LGK6... 08,5,5 27,5 27,5 7,5 03 37 23 Plug-in se AG7/AG7. 7785m04/0305 03 24/24 202 Siemens AG Infrstructure & Cities Sector Suject to chnge! Infrstructure & Cities Sector 06.03.202