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


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