LME41.054C2 Siemens Burner Control

Overview

The Siemens LME41.054C2 is a microprocessor-based burner control unit designed for the startup and supervision of 1- or 2-stage gas burners in intermittent operation. It is specifically engineered for atmospheric gas burners of small to medium capacity, with or without a fan. This unit serves as a high-reliability safety device, ensuring precise control sequences through digital signal handling and providing advanced diagnostics via a multicolor status indicator. It is frequently used as a modern replacement for legacy models like the LGD12.05A27.

Features

• Microprocessor-controlled digital signal handling for accurate timing and control sequences
• Undervoltage detection mechanism to ensure safe operation during power fluctuations
• Air pressure supervision with functional checks of the air pressure switch during startup and operation
• Multicolor LED for real-time indication of operational status and fault messages
• Electrical remote reset facility for convenient troubleshooting and system recovery
• Limitation of the number of repetitions to prevent unsafe burner operation
• Controlled intermittent operation, requiring a restart after a maximum of 24 hours of continuous run time
• Compatibility with ionization probes and QRA flame detectors (requires AGQ3.xA27 ancillary unit)

Specifications

• Model: LME41.054C2
• Supply Voltage: AC 230 V (-15%/+10%)
• Mains Frequency: 50/60 Hz
• Power Consumption: 12 VA
• Pre-aeration Time (t1): 1 second
• Waiting Time (tw): Max. 2.5 seconds
• Safety Time (TSA): Max. 5 seconds
• Pre-ignition Time (t3): Approx. 1 second
• Post-ignition Time (t3n): Approx. 4 seconds
• Operating Temperature: -20 C to +60 C
• Protection Rating: IP40 (when installed correctly)
• Weight: Approximately 0.13 kg (0.29 lbs)

Applications

• Supervision of 1- or 2-stage atmospheric gas burners
• Used in commercial and industrial heating systems and boilers
• Integration into gas-fired equipment by original equipment manufacturers (OEMs)
• Suitable for forced-draft gas burners when used with appropriate flame detectors
• Applicable in HVAC systems requiring intermittent burner operation and safety shut-off control