LME71.901A1PKG-PRG3 Siemens Flame Safeguard

Overview

The Siemens LME71.901A1PKG-PRG3 is a comprehensive, preprogrammed flame safeguard package designed for the supervision and control of industrial gas burners. This assembly simplifies installation by combining the LME71.000A1 burner control base unit with a specific PME71.901A1 program module and a complete AGG3.710 connector plug set. Engineered for high-demand applications, it provides critical safety functions, including managing burner startup, monitoring flame presence via UV scanner or flame rod, and controlling safety shutoff valves to prevent hazardous conditions during intermittent operation.

Features

• Integrated PWM fan motor control via 3-position controller or analog signal for burners with pneumatic ratio control
• Digital signal handling for high-accuracy control sequences and timing
• Multicolor LED status indicator for clear visual feedback on operating and error states
• Built-in 3 x 7-segment display for local monitoring of service, error, and status information
• Proof of Closure (POC) input to ensure gas valves are fully closed before startup
• Electrical remote lockout reset facility for convenient system management
• Undervoltage detection and air pressure supervision with functional checks of the air pressure switch
• BC interface for connecting external tools like the AZL2 display or a PC for advanced parameterization

Specifications

• Model: LME71.901A1PKG-PRG3
• Power Supply: AC 120 V (50/60 Hz)
• Components Included: LME71.000A1 (Base Unit), PME71.901A1 (Program Module), AGG3.710 (Plug Kit)
• Power Consumption: Approximately 12 VA
• Protection Rating: IP40 (when installed correctly)
• Operating Temperature: -20 C to +60 C
• Designed Lifetime: 250,000 startup cycles (approx. 10 years under normal conditions)
• Safety Compliance: UL, FM, CSA, and CE approved
• Mounting: Plug-in base connection

Applications

• Supervision of multistage or modulating forced draft gas burners
• Industrial thermal process applications requiring pneumatic ratio control via PWM fans
• Commercial boiler systems and HVAC plants with intermittent operation requirements
• Atmospheric gas burners of medium to large capacity
• Systems requiring integrated valve proving and air pressure monitoring for enhanced safety standards