LME21.130C2 Siemens Burner Control

Overview

The Siemens LME21.130C2 is a high-performance, microprocessor-based burner control unit designed for the startup and supervision of one- or two-stage gas burners. Engineered for intermittent operation in small to medium-capacity heating systems, this controller ensures reliable flame management by monitoring the combustion process through ionization probes or UV flame detectors. It serves as a modern, direct replacement for legacy Siemens models such as the LGB21.130A27 and LMG21.130B27, featuring digital signal processing for precise control sequences and enhanced safety.

Features

• Microprocessor-controlled operation for accurate timing and reliable phase programming
• Integrated flame signal amplifier for ionization-based flame supervision
• Multicolored LED status indicator for clear communication of operational and fault messages
• Electrical remote reset facility for efficient troubleshooting and system recovery
• Undervoltage detection to prevent improper operation during power fluctuations
• Air pressure supervision with a functional check of the air pressure switch during startup
• Limitation of the number of repetition cycles to enhance system safety
• Controlled intermittent operation with a mandatory shutdown every 24 hours

Specifications

• Model: LME21.130C2
• Supply Voltage: AC 230 V (50/60 Hz)
• Power Consumption: 12 VA
• Control Stages: 2-stage (without actuator control)
• Pre-purge Time (t1): 7 seconds
• Safety Time (TSA): 3 seconds
• Pre-ignition Time: 2 seconds
• Protection Rating: IP40 (when mounted appropriately)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 0.16 kg

Applications

• Supervision of automatic forced draft gas burners in commercial and industrial HVAC systems
• Ideal for use in atmospheric burners without fans or forced draft burners with fans
• Compatible with single or two-stage gas and gas/oil burners
• Integrated into burner packages by Original Equipment Manufacturers (OEMs)
• Suitable for heating plants requiring intermittent burner operation and safety shut-off control