Overview
The Siemens LME71.402A1PKG-PRG1 is a comprehensive, preprogrammed flame safeguard package designed for the startup and supervision of 1- or 2-stage gas burners in intermittent operation. This microprocessor-based unit serves as a central controller for industrial and commercial burner systems, ensuring safety by monitoring the flame and managing the fuel-to-air ratio. This specific “PKG” model comes preassembled and preprogrammed, including the LME71.000A1 burner control base unit, the PME71.402A1 program module, and a complete connector plug kit, streamlining installation and commissioning for HVAC professionals and OEMs.
Features
- Preprogrammed with the PME71.402A1 module, offering specific burner sequences for immediate integration
- Integrated 3-color LED signal lamp provides clear visual status for operation, recycling, and fault notifications
- Features a built-in 3 x 7-segment display for local monitoring of service, error, and status information
- Digital signal handling ensures highly accurate and repeatable control sequences
- Air pressure supervision with a built-in function check of the air pressure switch during start and operation
- Includes Proof of Closure (P.O.C.) and adjustable pre-purge time for enhanced system safety
- Remote lockout reset facility allows for efficient troubleshooting and system restarts
- Supports Modbus communication via optional modules for integration into building management systems
Specifications
- Model: LME71.402A1PKG-PRG1
- Mains Voltage: AC 120 V (+10% / -15%)
- Frequency: 50/60 Hz
- Components: LME71.000A1 base, PME71.402A1 module, and plug kit
- Flame Detection: Ionization probe or UV flame detector (e.g., QRA2, QRA4, QRA10)
- Flame Failure Response Time (FFRT): 1 second
- Safety Class: Protective Class I
- Power Consumption: Approximately 12 VA
- Weight: Approximately 5.0 lbs (2.27 kg)
- Operating Temperature: -20 C to +60 C
Applications
- Supervision of multistage or modulating forced draft gas burners in commercial and industrial settings
- Ideal for atmospheric burners of medium to large capacity
- Used in HVAC and boiler systems requiring controlled intermittent operation (lockout at least once every 24 hours)
- Suitable for systems requiring precise air pressure monitoring and safety shut-off valve control
- Optimized for linkageless burner management applications when used with compatible Siemens components


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