Product Overview
The Siemens LOA24.171B27 is a compact and reliable oil burner control unit designed to manage the complete combustion sequence for forced-draft oil burners operating in intermittent duty. It supervises ignition, flame detection, fuel valve control, and safe shutdown, ensuring optimal performance and protection for heating systems. This control is widely used in OEM burner assemblies and packaged burner installations where robust and repeatable operation is essential.
Key Features
Automatic Burner Sequencing: Manages pre-purge, ignition, flame confirmation, and shutdown in a safe, timed sequence, improving reliability and safety.
1- or 2-Stage Operation: Supports both single-stage and two-stage burner configurations for flexibility in system design.
Flame Supervision Compatibility: Works with flame detectors like photoresistive (QRB) and blue-flame (QRC) elements to ensure accurate flame presence verification.
Undervoltage Detection: Protects against unsafe electrical conditions by inhibiting startup under low supply voltage.
Bridging Contact for Oil Preheater: Provides interface support for preheater control where required.
Standard Timing Parameters: Typical timing values include t1 (pre-purge) ~13 s, TSA (safety ignition time) ~10 s, and t3n (post-ignition time) ~15-20 s at AC 220-240 V.
Applications
Forced-Draft Oil Burners: Controls oil burners with forced air draft in heating systems requiring dependable sequence control.
Industrial & Commercial Heating: Used in industrial boiler houses, furnaces, and packaged heating units where safe, automated combustion control is critical.
OEM Burner Integration: Ideal for original equipment manufacturers embedding control logic into burner systems.
Residential/Light Commercial Burners: Suitable where a compact, reliable control is needed for efficient 1- or 2-stage burner operation up to ~30 kg/h oil throughput.
Why Choose This Product
Trusted Siemens Quality: Built with precision engineering and high-quality components, the LOA24.171B27 delivers consistent performance over long service life.
Enhanced Safety: Integrated flame supervision and undervoltage protection help prevent unsafe run conditions while minimizing risk to equipment and personnel.
Flexible and Compatible: Works with multiple flame detector types and supports both single and two-stage burners, making it adaptable to a wide range of systems.
Easy Integration: Standardized design and electrical interfaces facilitate OEM integration and retrofit into existing burner assemblies.