LME73.812A1PKG-PRG2 Siemens Flame Safeguard

Overview

The Siemens LME73.812A1PKG-PRG2 is a high-performance, preprogrammed flame safeguard package designed for the startup and supervision of multistage or modulating forced draft gas and oil burners. This comprehensive kit includes the LME73.000A1 burner control unit, the PME73.812A1 program module, and a specialized plug kit. As a microprocessor-based system, it provides precise control over industrial and commercial combustion processes, featuring integrated actuator control with an independent ignition position. The LME73 series is engineered for intermittent operation, ensuring safety through continuous self-supervision and digital signal handling.

Features

• Preprogrammed with the PME73.812A1 module for specific modulating actuator control and independent ignition position
• Integrated actuator control via 3-position controller or analog signal, supporting linkageless fuel-air ratio control
• Comprehensive safety monitoring including undervoltage detection, air pressure supervision, and POC (Proof of Closure) switch testing
• Digital signal handling ensures highly accurate and repeatable control sequences
• Multicolor LED signal lamp and 3 x 7-segment display for clear status messaging and detailed fault diagnostics
• BC interface for seamless connection to AZL2 display units or PC-based service tools
• Designed for durability with a lifetime of approximately 250,000 burner startup cycles

Specifications

• Model Number: LME73.812A1PKG-PRG2
• Mains Voltage: AC 120 V (+10% / -15%)
• Frequency: 50…60 Hz
• Included Components: LME73.000A1 (Basic Unit), PME73.812A1 (Program Module), AGG3.710 (Plug Kit)
• Power Consumption: Approximately 3 VA
• Protection Rating: IP40 (when installed)
• Temperature Range: -20 C to +60 C (-4 F to +140 F)
• Flame Supervision: Ionization probe or UV flame detectors (QRA2, QRA4, QRA10)
• Response Time: Flame loss response time of < 1 second or 3 seconds depending on parameterization

Applications

• Industrial and commercial forced draft burners for gas or oil fuels
• Atmospheric gas burners requiring advanced supervision and modulating control
• HVAC systems and boiler rooms in large-capacity thermal process plants
• Multi-burner applications requiring individual burner supervision and communication
• Integration with Siemens SQM4 or SQM5 actuators for precise air/fuel ratio management