Technical information

IFD 258 · Edition 03.08
2
Contents
Automatic burner control unit IFD 258................. 1
Contents........................................2
1 Application.....................................4
1.1 Examples of application..........................5
1.1.1 Forced draught burners..............................6
1.1.2 Two-stage-controlled burner .........................7
1.1.3 Modulating-controlled burner ....................... 8
2 Certification ....................................9
3 Function......................................10
3.1 Connection diagrams ..........................10
3.1.1 IFD 258 ..........................................10
3.1.2 IFD 258..I ........................................12
3.2 Program sequence ............................13
3.3 Animation ...................................14
3.4 Program status and fault messages..............15
3.4.1 Reading off the flame signal . . . . . . . . . . . . . . . . . . . . . . . . 16
4 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Scanning the parameters ....................... 17
4.2 Flame control.................................18
4.2.1 Burner flame signal ...............................18
4.2.2 Switch-off threshold of the flame amplifier ............18
4.3 Behaviour during start-up ......................19
4.3.1 Normal start-up ..................................19
4.3.2 Start-up without flame signal .......................19
4.3.3 Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.4 Behaviour during operation .....................21
4.4.1 Safety time during operation t
SB
for V1 and V2..........21
4.4.2 Fault lock-out or restart ............................21
5 Replacement possibilities ........................23
6 Selection .....................................24
6.1 Determining the safety time t
SA.........................24
6.1.1 Calculating the safety time t
SA
...................... 24
6.2 Selection table................................25
6.2.1 Type code ...................................... 25
7 Project planning information......................26
7.1 Cable selection................................26
7.2 Star electrodes................................26
7.3 Purge .......................................26
7.4 Emergency stop in the event of fire or electric shock . 27
7.5 Emergency stop triggered by safety interlock .......27
7.6 Overload protection............................27
7.7 Parallel reset .................................27
7.8 Remote reset .................................27
7.9 Behaviour in the event of flame failure ............27
7.10 Wiring ......................................28
7.11 Note on EC type-examination ...................28
7.12 Installation of solenoid valves for gas ............28
7.13 Flame control ................................28
7.13.1 With ionisation sensor............................ 28
7.13.2 With UV sensor UVS ............................. 28
7.14 Flame signal cut-off point ......................28
7.15 Two-stage burner control with two solenoid valves .29
8 Accessories...................................30
8.1 High-voltage cable ............................30
8.2 Radio interference suppressed electrode adapters..30
9 Technical data................................. 31
9.1 Operating controls.............................32
9.2 Installation ...................................32
10 Maintenance cycles............................33
11 Legend ......................................33