LME22.233C2 Siemens Burner Control

Overview

The Siemens LME22.233C2 is a microprocessor-based burner control unit designed for the startup and supervision of 1- or 2-stage gas or gas/oil burners in intermittent operation. It serves as the safety brain of industrial and commercial burner systems, ensuring a precise control sequence through digital signal handling. This model is commonly used to monitor forced draft burners of low to medium heat output and is a direct replacement for legacy models like the LMG22.233B27 and LME22.233A2.

Features

• Undervoltage detection and air pressure supervision with functional checks during startup and operation
• Multicolor LED for status indication and fault diagnosis
• Electrical remote reset facility for convenience in industrial environments
• Accurate control sequence and timing managed by digital signal processing
• Controlled intermittent operation with a mandatory shutdown every 24 hours to ensure safety checks
• Support for ionization probes or UV flame detectors (such as the QRA series)

Specifications

• Model: LME22.233C2
• Supply Voltage: AC 230 V (50/60 Hz)
• Power Consumption: 12 VA
• Prepurge Time (t1): 20 seconds
• Safety Time (TSA): 3 seconds
• Actuator Running Time: 30 seconds
• Degree of Protection: IP40 (when mounted correctly)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 160g

Applications

• Startup and supervision of 1-stage or 2-stage gas burners
• Gas/oil forced draft burners in intermittent operation
• Use in HVAC systems, industrial boilers, and thermal processing plants
• Integration with Siemens actuator motors for fuel-air ratio control
• Applications conforming to EN 676 (gas burners) and EN 230 (oil burners) standards