Product Overview
The Siemens LME41 / LME44 series are microprocessor-based burner control units designed to automate and safeguard startup, ignition, flame supervision and shutdown sequences for 1-stage and 2-stage fan-assisted gas burners in intermittent combustion service. These controls integrate advanced digital logic to monitor safety inputs such as air pressure and flame signal (ionization probe or UV detector), and execute combustion sequences that meet stringent European safety standards (EN 298 for burner controls, EN 676 for forced-draft gas burners).
Key Features
• Automatic startup & supervision – Controls ignition, flame establishment, and safe shutdown of gas burners in intermittent operation.
• 1- or 2-stage support – Models like LME44 handle dual-stage combustion cycles for larger or more complex burners.
• Digital control logic – Precise timing and safety checks via microprocessor-based digital handling ensure repeatable, safe sequencing.
• Flame supervision systems – Works with ionization electrodes or Siemens QRA/QRB type flame detectors for robust flame presence detection.
• Safety monitoring – Integrated undervoltage detection, air pressure supervision (functional checks), and restart limitations enhance operational safety.
• LED status diagnostics – Multicolor LEDs indicate operational state, fault conditions, and sequence progress for easy troubleshooting.
• Compliance with standards – Designed and type-tested in line with EN 298 burner control requirements and EN 676 for forced-draft gas burner applications.
Applications
The LME41 / LME44 controls are ideal for:
• Industrial boiler systems – Supervised combustion in hot water and steam boilers.
• Commercial and industrial burners – Fan-assisted and atmospheric gas burner control in industrial furnaces and process heaters.
• Heat-generating plant rooms – Automated burner modules in HVAC and thermal process systems.
• OEM combustion packages – Integral safety control in manufacturer-built industrial burners.
Why Choose This Product
• Reliable safety compliance: Meets internationally recognized combustion safety standards (EN 298, EN 676), crucial for industrial gas burner operation.
• Robust and durable: Designed for industrial environments with wide operational temperature ranges and solid protection ratings (IP40).
• Clear diagnostics: LED indicators and fault reporting simplify commissioning, service, and maintenance.
• Flexibility & scalability: Supports a range of burner sizes and control schemes (single or dual stage).
• Proven Siemens engineering: Long-standing platform with wide OEM adoption and accessory ecosystem (detectors, sockets, reset devices).