Product Overview
The Siemens Oil Burner Controls LMO14, LMO24, and LMO44 series are microcontroller-based control units designed to manage the entire combustion sequence of forced-draft oil burners operating in intermittent duty. They help start the burner, supervise the flame, and control safety functions using precise digital logic. These controls are typically used in OEM assemblies and integrated into heating systems where dependable burner operation and safety are essential.
Key Features
Automatic Startup Sequence: Controls ignition, pre-purge, flame establishment phases, and shutdown in a programmed sequence to ensure safe operation.
Flame Supervision: Supports flame detection using photo-resistive detectors (QRB series) for yellow flames and blue-flame detectors (QRC series), enhancing safety and combustion reliability.
Safety Functions: Includes undervoltage detection, controlled intermittent operation, limitation of restart attempts after fault conditions, and remote reset capability.
Oil Preheater Support: Provides bridging contacts and timing supervision for oil preheating where required.
Digital Signal Handling: Ensures accurate and reproducible control sequences with digital electronics.
Status and Fault Indication: Multicolor LED indicators provide clear operational status and fault codes to support easier troubleshooting and maintenance.
Applications
Forced-Draft Oil Burners: Designed for 1-stage and 2-stage forced-draft oil burner systems in commercial and industrial heating applications.
Boilers and Furnaces: Ideal for integration into boiler and furnace controls requiring automatic fire ignition and flame safeguarding.
OEM Burner Systems: Widely used by Original Equipment Manufacturers (OEMs) in heating equipment where a standardized burner control interface is needed.
Direct-Fired Air Heaters: The LMO44 variant is particularly suited to use with stationary direct-fired air heaters.
Why Choose This Product
Proven Reliability: Built with Siemens’ microcontroller-based combustion control technology, these units offer consistent and dependable performance over long service lives.
Enhanced Safety: Integrated safety monitoring (undervoltage, flame loss detection, restart limits) helps protect equipment and personnel.
Clear Diagnostics: Multicolor LED and diagnostic signals make fault identification and maintenance easier and faster.
Flexible Integration: Standardized design with familiar interfaces and support for common flame detectors simplifies OEM system integration across multiple heater platforms.