Process firing sysem PF 9 T 2.6.2. ediion 8.95
Process Firing ysem PF, PFF, PFR, PFP 9" rack large choice of differen subracks giving various applicaions in accordance wih he cusomer's specificaion High inegraion UV deecor or flame rod circuiry Each card wih is own power supply (5 V and 2 inerchangeable) an be direcly conrolled by process conrol compuers wih 24 V Flame signal can be measured on he fron panel wihou shuing down he burner ll cards are F approved romschröder is a company cerified o O 900 onsrucion The sysem is based on plugin panel modules which are insalled in a 9" subrack. The subrack is hen wired o provide he sysem required for he specific applicaion. Primary power o he sysem is swichable beween 0/2 or 220/24. The same power is also supplied o he burner conrol unis for conrol of he air and gas solenoids via relay conacs and for he semiconducor oupu o he igniion ransformer. The power supply module generaes he 24 V conrol logic volage. General echnical daa ains volage swichable: 0/2, 5/0%, 50/60 Hz 220/24, 5/0%, 50/60 Hz for earhed or nonearhed neworks. ean swiching cycle dependen on power facor cosj approx. x 0 6. 9" card as Euro sized card wih plasic fron panel: Fron widh: 8 TE =.6 inch (40.6 mm). Heigh: HE = 5 inch (28.4 mm). E ype plug connecion o E 60, 48 pole. nsallaion posiion: any. mbien emperaure: 4 F o 40 F (20 o 60 ), no condensaion admissible. 2
pplicaion The PF burner managemen sysem is a modular sysem which provides flame supervision for burners of unlimied capaciy firing on gas. Flame supervision is accomplished via flame rod or UV deecors. The sysem is specifically designed o work wih new burner firing echniques, such as pulse firing, bu is equally adapable o oher firing echniques. The modular sysem can be arranged o provide individual lighoff conrol of each burner in a muliburner sysem. Flame on and failure indicaion are also provided as well as air valve saus indicaion when used in a pulsefired sysem. The auxiliary relay module may be used o provide individual limi swich saus annunciaion. Each flame supervisor module includes es jacks for measuremen of he flame signal curren. ndividual lighoff lock diagram Pilo igniion shown Flame rod shown also applicable o UV monioring imis complee PT Pulse conrol PF urner conrol uli burner conrol lock diagram irec spark iginiion shown imis complee UV PF 778 PF 778 urner conrol 24 V PFP 700 Power supply PFF 704 Flame relay ir UV PF urner conrol UV UV UV ir UV or flame rod PFP 700 Power supply 24 V
uomaic burner conrol uni PF Flame monioring wih flame rod or UV deecor gniion and monioring wih one elecrode possible (singleelecrode operaion) a PF 778 uliburner conrol wih addiional flame deecors (opion) eable air valve conrol (opion) ehaviour on sarup and flame failure seable Poenial free conacs for sandby, burner operaion and failure For flame signal cable up o max. 00 f (00 m) nfiniely adjusable cuoff sensiiviy of flame amplifier pplicaion PF is a burner flame supervisory conrol for he operaion of a burner wih unlimied TU capaciy. Each burner conrol uni provides an individual flame deecion and burner conrol circui. PF 748 The main gas valve opens direcly afer deecing he flame signal. is herefore paricularly suiable for on/off pulse operaed burners wih rapid sarup. Flame monioring wih flame rod only. PF 778 The operaion on burner sarup is inerchangeable. Eiher he main gas valve opens afer rial for igniion period (sandard) or he main gas valve is energized afer flame sabilizaion ime F. The igniion flame can sabilize during his ime before he conrol uni allows he main gas o ener. Flame monioring wih UV deecor or flame rod, single elecrode operaion is possible. The burner conrol uni is no affeced by UV deecor seeing he igniion spark. On boh burner conrol unis he operaion afer a flame failure can be se.. resar is recommended for single or wosep conrolled burners wih occasional flame insabiliy. o no use wih slowly closing air valves and coninuous conrol, if he burner is no allowed o sar wih max. capaciy on/off pulse operaed burners 2. mmediae faullockou following flame failure is he defaul seing for burners wih unlimied capaciy. Operaion volage Ex. air valve conrol urner on gniion ransformer Flame signal gas valve ain gas valve ir valve Faul indicaion Run Power on and no failure W Waiing ime (no flame check) s gniion ime 2 s, s or 7 s Trial for igniion period s, 5 s or 0 s Flame sabilizaion ime 5 s Flame simulaion delay 0 s Flame failure response ime 2 s Prolonged reacion ime = ir crl. Z F V V ir 4
The flame deecor, eiher flame rod or UV deecor, is checked for a no flame condiion during he waiing ime W. f no flame signal exiss, he igniion ransformer and sar gas valve are energized, oherwise he burner conrol goes o faullockou. aingasvalve opens. immediaely wih PF 748. 2. afer rial for igniion period or afer flame sabilizaion ime F wih PF 778. Program run The PF is designed o sequence he igniion and monior he flame of a single burner. When he sar signal is received, he PF performs he igniion sequence of he burner. The sar gas valve can be a pilo valve or a main gas valve when a low fire bypass sysem is used. PF 748, PF 778 Flame signal a sar < W V W Z PF 748 ormal sar opens direcly afer flame signal W PF 778 ormal sar 4=: opens afer W Z PF 778 ormal sar 4=2: opens afer F Z F f a saisfacory flame is deeced, i is annunciaed via he yellow Flame on E. The igniion ransformer is deenergized, he "sar" gas valve remains open and he main gas valve (if applicable) is energized. The energizing of he main gas valve is annunciaed via he green Run E. PF 748, PF 778 wihou flame W Z PF 748, PF 778 Flame failure during operaion =: Resar W Z Example: PF 778, opens afer PF 748, PF 778 Flame failure during operaion =2: mmediae faullockou uring he burner operaion, he PF coninously checks for a flame signal. There are hree differen operaions wih flame failure. PF 748, PF 778 Flame signal afer swich off V Rese following a faullockou by means of an inernal or exernal pushbuon. f a flame does no esablish he conrol goes o faullockou. flame failure is annunciaed via he red Failure E.. Resar Upon failure of he flame signal, here is an auomaic recycling on flame failure aemp. furher failure wihin sec. will cause a faullockou. 2. mmediae lockou (sandard). The burner conrol uni also checks for a flame signal afer he burner has shudown. f he flame does no exinguish wihin approx. 0 sec afer he burner has been shudown by he hermosa, he conrol will go o faullockou. 5
Variaions PF.. gas conrol only, wihou exension (sandard). PF.. have air valve conrol, which means: a. The burner conrol uni has an inpu (0e) for direc conrol of he air valve wih mains volage for purging. b. The air valve can be operaed via a 24 V conrol inpu or as a funcion of he program..the air valve opens wih sar gas valve afer hea is demanded. can be acivaed exernally if no hea is demanded. PF 7x8, PF 7x8 ir valve conrol 2 = : ir valve opens wih W W Z Z 0a ir crl. ir 2.ir valve can only be acivaed exernally via connecions 0a 2a. PF 7x8, PF 7x8 ir valve conrol 2 = 2: ir valve is acivaed exernaly PF 7x8, PF 7x8 ir valve conrol 2 = : ir valve opens wih W Z 0a ir crl. ir.the air valve opens wih main gas valve afer hea is demanded. can be acivaed exernally if no hea is demanded. 0a ir crl. Example: PF 778, opens afer ir f he air valve is energized, i is annunciaed via he yellow ir on E. The air valve canno be acivaed if he burner conrol uni regisers a faul. PF 778 muliburner conrol in conjuncion wih PFF 704 see page 8. PF 778 wih boh: ir valve conrol and muliburner conrol. Technical daa Power consumpion logic conrol: Oupu volage for valves and igniion ransformer = mains volage. urren raing for valve oupus: max. 2 igniion oupu: max..2 bu oal curren: max. 2 poenial free conacs: max., 264 V or 2, 2 (no inernally fused). Finewire fuse 2.8, fas blowing, acc.o U. onrol inpus (elecrically isolaed) 24 V, ± 0 %, < 0 m per inpu. onswiched inpus are no addressed. an be supplied via romschroder ype Power supply PFP 700. ax. lengh of flame signal cable: 00 f (00 m). onizaion volage: 2. uoff sensiiviy of flame amplifier: µ 0 µ (se a facory a µ). Weigh: approx.. lbs (0.6 kg). Flame on, yellow ain gas on (if conneced), green Faul indicaion, red Rese buon ir valve open, yellow Tes jacks for flame signal Operaing swich Type PF 7 7 8 Produc line = 7 ain gas afer flame signal = 4 ain gas afer safey ime or main gas afer = 7 flame sabilisaion ime, swichable Resar or immediae faul lockou = 8 swichable andard = ir valve conrol = uli flame conrol = oh = 6
Planning aids Use highvolage cables for he ionizaion and igniion lines, no screened. FZi /6 up o 56 F (80 ) iem o. 0425040 or FZ /7 up o 76 F (80 ) iem o. 04250409 eep he ionizaion cable away from he igniion cable and oher sources of inerference. The purging operaion mus be compleed before he power is conneced o erminal 26e o supply he valves and igniion ransformer. To preven he 9" cards from being confused hey should be coded. oding srips are available o order. The hea demand o he conrol uni mus be longer han he delay W plus rial for igniion period plus flame sabilizaion ime F (where applicable) paricularly in he case of program conrol. n indusrial sysems he furnace conrol swiches on he cenral combusion blower. For his reason a separae connecion for a blower is no provided. imis compl. UV 2 UVconrol 24 V finished irec spark igniion PF 748 x 0e 26e 24c F F2 2 0 O 2 5 V P 0 µ V 2 V 2a 4a 2c 4c ir max. 2, 2 max., 264 V PF 748 Rese ir valve conrol 0a 2a 0c 2c 2 () 2 () G R TZ/ TG gniion and conrol wih elecrode PF 778 PF 778 imis compl. UV 2 8a 8c UVconrol 24 V PF 778 PFF 704 24 V ir valve crl Rese finished irec spark igniion PF 778 x 0e 26e 24c 2 8a 8c 0a 2a 0c 2c F F2 0 O R P 0 µ 2 5 V 2 () 2 () V 2 2 F G V 2a 4a 2c 4c 4 ir max. 2, 2 max., 264 V 7
Flame relay PFF 704 For flame deecion For muliburner conrol Flame monioring wih flame rod or UV deecor Four independen flame amplifiers ingleelecrode operaion possible pplicaion To deec and signal an exising gas flame using flame rod or UV deecor. For use wih muliburner conrol on burner conrol unis PF 778 or where auomaic monioring is no required. Funcion The PFF 704 has four independen flame amplifiers. When a flame is presen he amplifier energizes a relay. The conacs of his relay can be used for conrol funcions. Principle of muliburner conrol uliburner conrol involves he join conrol of several burners. One burner conrol uni is responsible for he enire conrol funcion and also moniors he firs burner. Flame relays monior he oher burners in his group. f a flame moniored by he PFF 704 goes ou during operaion, a signal o he auomaic conrol is inerruped and all oher burners are swiched off immediaely. f an ouside ligh is deeced before he igniion (no flame check), he sysem goes o lockou. The drawing shows an example wih flame rod. UV monioring or singleelecrode operaion is also possible. imis compl. uli burner conrol wih five burners (direc spark igniion shown) PFP 700 0e 0 O PFF 704 8ace 24 V 2ace 6a 4c 6e finished PF 778 0e 26e 24c 2 8a 8c 2a 4a 2c 4c ir 2a 0c 22a 20e 0a 2a 0c 2c ir valve crl Rese 2 28a 26c 26e 2 8
Technical daa Power consumpion:. onizaion volage: 2. ax. lengh of flame signal cable: 00 f (00 m). uoff sensiiviy of flame amplifier: µ 0 µ (se a facory a µ). Finewire fuse 2.8, fas blowing, acc. o U. Weigh: approx.. lbs (0.5 kg). Planning aids Very long gas lines migh resul in delayed igniion of a burner and cause a shudown of he enire sysem. Experience demonsraes ha a number of auomaic burner conrols should be used when sysems wih more han 9 burners are involved. The igniion gas valves mus be fied close o he burner as a flame signal mus be deeced a all burners during he safey ime when saring up. s he burner conrol uni acivaes all valves and igniion ransformers, coupling relays migh be required o ensure ha he maximum load a he oupus is no exceeded. gniion and monioring wih jus one elecrode (singleelecrode operaion) is possible wih a surge arreser. TZ/ TG UV 2 2a PFF 704 0e 2a 20V 0 O P 2 5 V F2 F 6a 6c 4a 4c 6e max. 2, 264 V TZ/ TG UV 2 8a 8a 20V 2 P2 F4 2a 2c 0a 0c F max. 2, 264 V TZ/ TG UV 2 8a 8a 20V P F6 22a 22c 20a F5 20e max. 2, 264 V TZ/ TG 2 2 UV 2 24a 24a 20V 2 4 P4 F8 28a 26c F7 26e 2 max. 2, 264 V 9
Relay module PFR 704 Power supply PFP 700 Four isolaed relays wiching saus displayed on fron panel Oupu volage 24 V. Oupu load 4 V horcircuiproof pplicaion uliple conacs e.g. for acivaion of several air buerfly valves via a single conrol signal when purging or for swiching beween heaing and cooling when using an PT 68. pplicaion The PFP 700 power supply is used o supply conrol inpus on he burner conrol uni or o provide auxiliary power o relay cards. 2 5 V 24 V / 2 5 V 24 V / 2 5 V 24 V / 2 5 V 24 V / PFR 704 2a 2c 0a 0c 8a 8c 20e 26e 26c 2 G 2 G G 4 G 6a 6e 8a 8c 6c 6a 6e 4a 4c 24a 2 22a 22c 24c 2a 0e 0c max. 2, 264 V max. 2, 264 V max. 2, 264 V max. 2, 264 V Technical daa Power consumpion: 0/2, 5/0 %, 50/60 Hz 220/24, 5/0 %, 50/60 Hz or 24 V or, ± 0 %. urren per relay: 25 m. onac load on isolaed oupus: max. 2, 264 V (no inernally fused). Weigh: 0.7 lbs (0.7 kg). Funcion The operaing saus is displayed on he fron panel (green E). n he even of an overload a oupu > 600 m he red E comes on, he green E goes ou and he PFP 700 swiches off he oupu. Technical daa Power consumpion: 25 V. Oupu load: 24V, 600 m, shorcircuiproof. Finewire fuse 0.7, slow blowing, acc. o U. Weigh: approx..7 lbs (0.75 kg). PFP 700 F 0 O U G 2 5 V R 24 V 600 m 8ace 2ace We reseve he righ o make echnical changes designed o improve our producs wihou prior noice. Opional esign: ircui board wih erminals. When using flame conrol only he sysem assembly can be accomplished by he cusomer. The circui board is designed for one () PFP 700 and nine (9) PF 7xx. oe: This circui board can no be used for PT or PFF modules. romschröder nc. 69H, OH 4426 Tel. 2 6 4205 95 Fax 2 6 4205 96 www.kromschroder.com U@aol.com G. romschröder G Posfach 2809 4908 Osnabrück Tel. 05 4/2 40 Fax 05 4/2 4 70 info@kromschroeder.com www.kromschroeder.com 0250096 9.99 EG/V.000 0