LME44.057C1 Siemens Burner Control

Overview

The Siemens LME44.057C1 is a high-precision, microprocessor-based burner control designed for the startup and supervision of 2-stage atmospheric gas burners. Specifically engineered for intermittent operation in small to medium-capacity combustion systems, this flame safeguard provides critical safety functions including air pressure supervision and undervoltage detection. It serves as a modern digital replacement for legacy analog controllers like the Siemens LGB41, offering improved reliability through digital signal handling and a robust control sequence.

Features

• Microprocessor-controlled sequence for accurate and repeatable timing
• Designed for 2-stage atmospheric burners with support for actuator control
• Air pressure supervision with a functional check of the air pressure switch during startup and operation
• Multicolor LED indicator provides clear status and fault messages for easier troubleshooting
• Electrical remote reset facility allows for convenient lockout recovery
• Undervoltage detection ensures the burner shuts down safely if power drops below operational limits
• Controlled intermittent operation triggers a safety restart after a maximum of 24 hours of continuous run time
• Terminal configuration allows for direct replacement of LGB41 series controllers

Specifications

• Model: LME44.057C1
• Supply Voltage: AC 120 V (+10% / -15%), 50/60 Hz
• Burner Type: Atmospheric, 2-stage
• Flame Supervision: Ionization probe or UV detector (QRA series with AGQ3 ancillary unit)
• Safety Time (TSA): 5 seconds
• Pre-ignition Time: 2 seconds
• Post-ignition Time: 4.5 seconds
• Purge Time: 9 seconds
• Waiting Time: 16 seconds
• Actuator Running Time: 8 seconds
• Power Consumption: Approximately 12 VA
• Protection Rating: IP40 (when installed)

Applications

• Supervision of 1- or 2-stage atmospheric gas burners in commercial and industrial settings
• Integration into gas-fired equipment such as boilers, furnaces, and heaters
• Use in HVAC systems requiring forced draft or atmospheric burner control
• Replacement for legacy Siemens LGB41 series burner control units
• Suited for systems using ionization probes for flame detection or UV scanners in gas/oil burner configurations