Product Overview

The Siemens LME39 Burner Controller is a microprocessor-based automatic burner control system developed for the startup, control, and supervision of gas burners operating in intermittent mode. It is suitable for forced-draft burners, with or without a fan, and is widely used in industrial heating systems.

The controller manages all critical burner functions including pre-purge, ignition, flame monitoring, safety shutdown, and post-purge, ensuring compliance with international combustion safety standards. Flame supervision is performed using an ionization probe or UV flame detectors, providing dependable flame detection and operational stability.

Designed specifically for OEM burner manufacturers and industrial installations, the LME39 features digital signal processing, air pressure monitoring, undervoltage protection, and restart limitation, improving burner reliability and system protection. An integrated multicolor LED indicator provides clear operational and fault status, enabling faster diagnostics and reduced downtime.

Key Features

Suitable for 1-stage & 2-stage gas burners

Supports ionization probe and UV flame detectors

Digital burner sequence control for high accuracy

Air pressure supervision with functional checks

Undervoltage detection for enhanced electrical safety

Restart limitation to prevent unsafe repeated ignition

Multicolor LED indication for status & fault diagnosis

Electrical remote reset facility

Controlled intermittent operation (mandatory after max. 24 hrs)

BC interface for parameterization & diagnostics

Designed lifetime of up to 250,000 burner start cycles

Applications

• Industrial gas burners

• Boilers and furnaces

• Forced-draft gas burner systems

• Commercial heating equipment

• OEM burner manufacturing

• Process heating applications

Why Choose Siemens LME39 Burner Controller?

Trusted Siemens industrial reliability

Complies with DIN EN 298 safety standards

Long operational life with minimal maintenance

Flexible compatibility with multiple flame detectors

Ideal for demanding industrial environments

Widely accepted by OEMs and burner manufacturers

Technical Description

The Siemens LME39 Burner Controller is an automatic electronic burner control unit designed for safe supervision and control of gas burners with intermittent operation. It supports single-stage and two-stage burner configurations, providing precise timing control for ignition, flame detection, and shutdown.

Flame supervision is achieved via ionization current measurement or UV flame detectors (QRA series with AGQ3 ancillary unit). The controller incorporates digital logic, enabling accurate program sequences, while built-in air pressure switch monitoring ensures correct airflow during startup and operation.

The unit features multicolor LED signaling for operational states and fault diagnostics and allows parameterization via display units or PC software, making it suitable for modern industrial burner systems.

Technical Specifications