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


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