Siemens Burner Controllers LME39 Series

Siemens Burner Controllers LME39 Series

Siemens LME39 Series are automatic gas burner control units designed for the startup and supervision of small to medium-capacity 1- or 2-stage gas burners, with or without a fan, operating in intermittent mode.

The LME39 Series uses digital signal processing to provide accurate burner program sequencing, including startup, ignition, flame supervision, and controlled shutdown. Integrated monitoring functions help detect abnormal operating conditions and support safe burner operation.

Key Features

• Designed for 1- or 2-stage gas burners
• Flame supervision using an ionization probe or QRA UV detector with AGQ3 ancillary unit, depending on configuration
• Accurate burner sequencing through digital signal processing
• Integrated undervoltage detection
• Air pressure supervision during startup and operation, depending on parameterization
• Multicolor LED indication for operating status and fault diagnostics
• Electrical remote lockout reset capability
• Configurable restart limitation
• Controlled intermittent operation after a maximum of 24 hours of continuous operation
• Parameterization and diagnostics using AZL2 or ACS410 with compatible interface accessories

Available Models

• LME39.100C1 – AC 120 V
• LME39.100C2 – AC 230 V
• LME39.400C1 – AC 120 V
• LME39.400C2 – AC 230 V

Each model has specific program sequences and timing requirements. The correct model and parameter settings must be selected according to the burner application.

Typical Applications

• Industrial gas-fired boiler systems
• Gas-fired heating equipment
• Single-stage and two-stage gas burners
• Burner systems requiring flame supervision
• Intermittent gas combustion applications

Selection Guidelines

Before selecting an LME39 burner controller, verify the supply voltage, model designation, flame detector type, required program sequence, and operating parameters. Installation, commissioning, and parameter adjustments should be performed by qualified personnel in accordance with Siemens technical documentation.