Technical information
IFD 244 · Edition 03.08
2
t
= To be continued
Table of contents
Automatic burner control unit IFD 244................. 1
Table of contents .................................2
1 Application.....................................4
1.1 Examples of application..........................5
1.1.1 Atmospheric burners................................6
1.1.2 Forced draught burners .............................7
1.1.3 Two-stage-controlled burner ........................ 8
1.1.4 Modulating zone control.............................9
2 Certification ...................................10
3 Function.......................................11
3.1 Connection diagrams ...........................11
3.2 Program sequence ............................12
3.3 Animation ...................................13
3.4 Program status and fault messages..............14
3.4.1 Reading off the flame signal . . . . . . . . . . . . . . . . . . . . . . . . 15
4 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Scanning the parameters .......................16
4.2 Flame control................................. 17
4.2.1 Burner flame signal ...............................17
4.2.2 Switch-off threshold of the flame amplifier ............17
4.3 Behaviour during start-up ......................18
4.3.1 Normal start-up ..................................18
4.3.2 Start-up without flame signal .......................18
4.3.3 Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.4 Behaviour during operation .....................20
4.4.1 Safety time during operation tSB for V1 and V2 ........ 20
4.4.2 Restart following flame failure ..................... 20
5 Replacement possibilities ........................ 21
6 Selection .....................................22
6.1 Determining the safety time tSA . . . . . . . . . . . . . . . . . . 22
6.1.1 Calculating the safety time t
SA ..............................22
6.2 Selection table................................23
6.2.1 Type code ...................................... 23
7 Project planning information......................24
7.1 Cable selection................................24
7.1.1 Ionisation cable and ignition cable .................. 24
7.2 Star electrodes................................24
7.3 Purge .......................................24
7.4 Emergency stop in the event of fire or electric shock .25
7.5 Emergency stop triggered by safety interlock .......25
7.6 Overload protection............................25
7.7 Parallel reset .................................25
7.8 Remote reset .................................25
7.9 Behaviour in the event of flame failure ............25
7.10 Wiring ......................................26
7.11 Note on EC type-examination ...................26
7.12 Installation of solenoid valves for gas ............26
7.13 Flame control ................................26
7.14 Flame signal cut-off point ......................26
8 Accessories...................................27
8.1 High-voltage cable ............................27
8.2 Radio interference suppressed electrode adapters..27
9 Technical data.................................28
9.1 Operating controls.............................29
9.2 Installation ...................................29
10 Maintenance cycles............................30
11 Legende .....................................30