| Burner Type | gas, oil, or bi-fuel |
| Operation Mode | intermittent (shutdown by regulation minimum 1× per 24 h) |
| Series Variants | 01 and 02 (differ by ignition safety time duration) |
| Air Damper Control | yes |
| High Power Variant | LFL1.638 for large atmospheric burners |
| Burner Control Type | multi-stage or modulating |
| Burner Power Rating | medium to large |
| Burner Configuration | single or dual tube |
| Lfl1 638 Application | large atmospheric burners |
| Controlled Air Damper | yes |
| Probe Cable Max Length | see technical characteristics |
| Uv Probe Configuration | up to 2 probes in parallel possible |
| Application Suitability | hot air generators |
| Safety Time Second Phase | t9 |
| Flame Supervision Sensor Uv | QRA type |
| Unlock Function Max Duration | 10 s |
| Unlock Button Operating Force | ≤ 10 N |
| Terminal Grounding Requirement | terminal 22 to earth when using QRA type sensors |
| Dual Sensor Operation Restriction | only one sensor active except during 2nd safety time (t9) |
| Flame Supervision Sensor Ionization | yes |
| Ionization Probe Contact Protection | not protected against accidental contact |
| Probe Signal Transmission Requirement | separate low-capacitance cable required |
| Installation Requirement Ignition Cable | separate installation, maximum distance from apparatus and other cables |
