LME73.811A1PKG-PRG2 Siemens Flame Safeguard

Overview

The Siemens LME73.811A1PKG-PRG2 is a high-performance, microprocessor-based burner control assembly designed for the startup and supervision of medium to large-capacity forced draft gas or oil burners. This “PKG” version is a comprehensive factory-assembled solution that includes the LME73.000A1 basic unit, a PME73.811A1 program module, and a complete AGG3.710 terminal plug set. Specifically preprogrammed (PRG2), it features integrated actuator control for modulating or multi-stage burners, ensuring precise fuel-air ratio management and enhanced safety through closed-loop control and digital signal processing.

Features

• Integrated actuator control for driving and proving positions during purge and ignition sequences
• Comprehensive safety interlocks with independent wiring for specific fault indication
• Built-in 3×7-segment display for local service, error code, and status information
• Multicolor LED signal lamp provides clear visual status of operating and error states
• Electronic self-supervision of all safety-related digital inputs and outputs via a contact feedback network
• Modbus communication capability and remote display options for advanced system integration
• Password-protected safety parameters to ensure secure and tailored application settings
• Air pressure supervision with functional checks of the air pressure switch during startup

Specifications

• Model: LME73.811A1PKG-PRG2
• Mains Voltage: AC 110 V to 120 V (50/60 Hz)
• Power Consumption: Approximately 3 VA
• Degree of Protection: IP40 (when mounted correctly)
• Operating Temperature: -20 C to +60 C
• Design Lifetime: 250,000 burner startup cycles (approx. 10 years)
• Flame Supervision: Ionization probe or UV flame detectors (QRA2, QRA4, or QRA10)
• Weight: Approximately 5.0 lbs (2.27 kg)
• Dimensions: 12 x 8 x 8 inches

Applications

• Supervision of modulating or multi-stage forced draft gas and oil burners
• Industrial thermoprocessing plants compliant with EN 746-2 safety requirements
• Commercial boiler systems and high-demand HVAC combustion equipment
• Packaged burner applications requiring integrated actuator control and linkageless fuel-air ratio management
• Systems utilizing pilot or direct ignition with required valve proving functions