LME22.231C2 Siemens Burner Control

Overview

The Siemens LME22.231C2 is a microprocessor-based burner control unit designed for the startup and supervision of 1- or 2-stage gas or gas/oil forced draft burners. Built for intermittent operation, this compact controller ensures safe burner performance by monitoring the flame and managing the sequence of operations. It is a digital replacement for legacy LGB and LMG series controls, offering improved accuracy and diagnostic capabilities for small to medium-capacity combustion systems.

Features

• Microprocessor-controlled for precise timing and consistent operation sequences
• Integrated undervoltage detection to prevent unsafe operation during power fluctuations
• Multi-color LED indicator provides real-time status and detailed fault diagnostic messages
• Air pressure supervision with a functional check of the air pressure switch during startup
• Electrical remote reset facility for convenient system recovery after a lockout
• Accurate digital signal handling ensures reliable flame supervision via ionization probe or QRA flame detectors

Specifications

• Model: LME22.231C2
• Operating Voltage: AC 230 V (+10% / -15%)
• Frequency: 50/60 Hz
• Power Consumption: 12 VA
• Pre-Purge Time (t1): 20 seconds
• Safety Time (TSA): 3 seconds
• Actuator Running Time: 12 seconds
• Protection Rating: IP40 (when properly mounted)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 160g

Applications

• Supervision of 1- or 2-stage gas or gas/oil burners of small to medium capacity
• Industrial and commercial fan-assisted gas burners conforming to EN 676 and EN 298
• Central heating systems and commercial boiler units
• Linkageless control systems requiring precise timing and integration with actuators
• HVAC and thermal process plants requiring intermittent burner operation