Siemens LFL Series
Siemens LFL Series includes burner control boxes used for forced-draft burner sequencing, purge control, ignition supervision, and safety shutdown. This guide compares common models, naming logic, selection checks, and related model pages.
What Is the LFL Series?
The Siemens LFL Series family is a focused product group within Siemens burner accessories. Engineers usually evaluate these models by application fit, electrical and mechanical compatibility, replacement risk, and the original burner control sequence.
Model Naming Logic
LFL suffixes normally distinguish timing programs, operating mode details, and application variants for gas, oil, or dual-fuel forced-draft burners.
Common Models in This Series
| Model | Type | Key Data | Page |
|---|---|---|---|
| LFL1 122 | Flame Detector | Controllers | View specs |
| LFL1.133 | Flame Detector | Controllers | View specs |
| LFL1.322 | Flame Detector | Controllers | View specs |
| LFL1.333 | Flame Detector | Controllers | View specs |
| LFL1.335 | Flame Detector | Controllers | View specs |
| LFL1.622 | Flame Detector | Controllers | View specs |
| LFL1.635 | Flame Detector | Controllers | View specs |
| LFL1.638 | Flame Detector | Controllers | View specs |
FAQ
What applications use Siemens LFL controllers?
LFL controllers are commonly used on forced-draft industrial burners that require supervised purge, ignition, flame monitoring, and safety lockout.
What should be checked before replacing an LFL unit?
Confirm the timing program, flame detector, wiring terminals, safety interlocks, and burner fuel sequence before substitution.