Overview
The Siemens LME22.331C1 is a high-precision, microprocessor-based burner control designed for the startup and supervision of 1- or 2-stage gas or gas/oil burners of small to medium capacity. Operating in intermittent mode, this controller ensures a safe combustion process by managing fixed time and phase programs. It is specifically engineered for systems that utilize an actuator for air-fuel ratio control and is typically integrated by original equipment manufacturers (OEMs) into industrial and commercial burner systems.
Features
- Microprocessor-controlled sequence for accurate and repeatable signal handling
- Integrated undervoltage detection to prevent operation during power fluctuations
- Air pressure supervision with functional testing of the air pressure switch during startup and operation
- Multi-color LED indicator providing clear status messages and fault diagnostics
- Electrical remote reset facility for efficient troubleshooting and system recovery
- Controlled intermittent operation, requiring a restart after a maximum of 24 hours of continuous run time
- Compact design compatible with legacy LGB and LMG burner control housing dimensions
Specifications
- Model: LME22.331C1
- Supply Voltage: AC 120 V (50/60 Hz)
- Pre-purge Time (t1): 30 seconds
- Safety Time (TSA): 3 seconds
- Actuator Running Time: 12 seconds
- Pre-ignition Time: 2 seconds
- Specified Time for Air Pressure Signal: 3 seconds
- Flame Supervision: Ionization probe or QRA flame detector with AGQ3 ancillary unit
- Protection Rating: IP40 (when installed with appropriate base)
- Weight: Approximately 0.35 lbs (0.16 kg)
Applications
- Supervision of 1- or 2-stage gas or gas/oil burners in intermittent operation
- Forced draft burners conforming to EN 676 and EN 230 standards
- Atmospheric burners with or without fan support
- Industrial and commercial boiler systems and thermal process plants
- Use in gas trains requiring linkageless actuator control for air-fuel modulation


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