LME11.230C2 Siemens Burner Control

Overview

The Siemens LME11.230C2 is a microprocessor-based burner control unit designed for the startup and supervision of single-stage gas or gas/oil burners. It is primarily used for small to medium-capacity burners in intermittent operation, meaning it must cycle at least once every 24 hours. Built to replace legacy LGB and LMG series controllers, the LME11.230C2 provides enhanced reliability and safety through digital signal processing.

Features

• Undervoltage detection ensures safe shutdown if power levels drop below a specific threshold
• Air pressure supervision with a functional check of the air pressure switch during startup and operation
• Digital signal handling provides an accurate and repeatable control sequence
• Multicolor LED integrated into the reset button displays operational status and detailed fault diagnostic codes
• Electrical remote reset facility for convenient lockout recovery
• Heat-resistant and flame-retardant plastic housing designed for durable industrial use

Specifications

• Mains Voltage: AC 230 V (50/60 Hz)
• Power Consumption: Approximately 12 VA
• Flame Supervision: Ionization probe or UV flame detector QRA (with AGQ3 ancillary unit)
• Pre-Purge Time (t1): 20 seconds
• Safety Time (TSA): 3 seconds
• Protection Rating: IP40 (when properly installed)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 160 g

Applications

• Supervision of single-stage gas or gas/oil burners with a capacity up to 120 kW
• Used in atmospheric burners as well as forced draft burners conforming to EN 676
• Ideal for HVAC systems, commercial boilers, and industrial thermal process plants
• Integrated into burner systems by original equipment manufacturers (OEMs) for automated combustion control