Product Overview
The Siemens LAL… series comprises a family of oil burner control units designed to manage the complete combustion sequence for medium- to large-capacity oil atomizing burners operating in intermittent duty. These controls provide safe automatic startup, flame supervision, and shutdown functions and are engineered for OEM integration into industrial and commercial heating systems. The series offers variants with different capabilities — for example, models with or without air pressure supervision — making it versatile for various burner configurations.
Key Features
Automatic Burner Sequencing: Manages pre-purge, ignition, flame sensing, fuel release, and shutdown in a defined, timed sequence to ensure safe and reliable operation.
Flame Supervision: Works with multiple detector types — including photo-resistive QRB, blue-flame QRC1, and silicon photocell RAR9 sensors — to reliably confirm flame presence and detect faults.
Air Pressure Supervision Options: Certain variants (e.g., LAL2…) include air pressure supervision to verify correct air damper operation before fuel release.
Safety & Lockout Logic: Built-in safety checks automatically lock out the control if unsafe conditions are detected, protecting equipment and operators.
OEM-Ready Design: Designed for integration into burner assemblies, with plug-in base options and standardized interfaces to simplify system engineering.
Applications
Oil Atomizing Burners: Used for sequence control and safety supervision of oil burners in industrial and commercial heating applications.
Multistage or Modulating Burners: Suitable for systems requiring multiple firing stages or variable output control.
Intermittent Operation: Designed for installations where the burner cycles on and off at least once every 24 hours, enabling self-tests of flame supervision circuits.
OEM Heater Systems: Ideal for integration into packaged boilers, furnaces, and stationary air heaters (WLE).
Why Choose This Product
Proven Reliability: Siemens LAL burner controls are engineered for dependable long-term operation in intermittent duty, with a designed life of approximately 250,000 startup cycles under normal heating conditions.
Versatile Supervision: Supports multiple flame detector types and optional air pressure supervision, accommodating a wide range of burner designs and safety requirements.
Improved Safety: Integrated lockout logic and safety checks reduce risk by interrupting fuel supply immediately if unsafe conditions are detected.
OEM Flexibility: Standardized module design and plug-in base options make it easier for equipment manufacturers to embed reliable control logic into heating systems.