LME21.130C1 Siemens Burner Control

Overview

The Siemens LME21.130C1 is a high-performance, microcomputer-based burner control designed for the startup and supervision of 1- or 2-stage gas or gas/oil burners. Engineered for intermittent operation, this controller is suitable for burners of small to medium capacity, with or without a fan. It serves as a direct, technologically advanced replacement for legacy models such as the LGB21.130A17. The LME21.130C1 ensures safe and efficient combustion by monitoring the flame via an ionization probe or a QRA flame detector with an ancillary unit, making it a critical safety component for industrial and commercial heating systems.

Features

• Microcomputer-based control with digital signal handling for an accurate and repeatable control sequence
• Undervoltage detection mechanism that safely shuts down the burner if the supply voltage drops below a critical level
• Integrated air pressure supervision with a functional check of the air pressure switch during startup and operation
• Multicolor LED signal lamp provides clear indication of operational status and detailed fault messages
• Electrical remote reset facility allows for convenient system recovery after a lockout
• Controlled intermittent operation ensures a safety shutdown at least once every 24 hours of continuous use
• Compact plug-in design compatible with standard AGK11 bases for easy installation and maintenance

Specifications

• Model: LME21.130C1
• Supply Voltage: AC 120 V (50/60 Hz)
• Power Consumption: Approximately 12 VA
• Pre-purge Time (t1): 7 seconds
• Safety Time (TSA): 3 seconds
• Pre-ignition Time: 2 seconds
• Waiting Time: 2.5 seconds
• Protection Rating: IP40 (when mounted)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 160g

Applications

• Supervision of 1- or 2-stage gas burners or forced draft gas/oil burners in commercial boiler systems
• Suitable for atmospheric burners without fans or forced draft burners with fans
• Integration into original equipment manufacturer (OEM) burner packages and gas trains
• Use in HVAC systems, industrial thermal process plants, and medium-capacity steam boilers
• Ideal for retrofitting and replacing older Siemens/Landis & Gyr LGB series burner controls