LME71.111A2PKG Siemens Flame Safeguard

Overview

The Siemens LME71.111A2PKG is a comprehensive, microprocessor-based burner control package designed for the startup and supervision of 1- or 2-stage gas forced draft burners. This preassembled kit includes the LME71.000A2 basic unit, a PME71.111A2 program module, and a connector plug set, providing a convenient all-in-one solution for industrial and commercial combustion applications. Engineered for intermittent operation, the flame safeguard ensures system safety by energizing safety shutoff valves while continuously monitoring the flame via a UV scanner or ionization probe.

Features

• Integrated Burner Control: Manages essential functions including programmable purge, Proof of Closure (P.O.C.), and Trial for Ignition (TFI) for both pilot and main burners.
• Advanced Monitoring: Features air pressure supervision with a function check of the air pressure switch during start and operation.
• User Interface: Built-in 3×7-segment display provides real-time service, error, and status information, complemented by a multi-color LED signal lamp for quick visual diagnostics.
• Communication Options: Supports Modbus communication modules and remote display attachments for enhanced system integration.
• Safety and Security: Parameters are password-protected to prevent unauthorized adjustments, and the unit includes a lockout reset button for manual intervention.
• Durable Design: Engineered for a long service life of approximately 250,000 startup cycles, equating to roughly 10 years of standard operation.

Specifications

• Model: LME71.111A2PKG
• Components: LME71.000A2 (Base Unit), PME71.111A2 (Program Module), and Plug Kit
• Supply Voltage: AC 230 V (50/60 Hz)
• Operation: Intermittent (at least one controlled shutdown every 24 hours)
• Flame Detection: Ionization probe or UV flame detectors (e.g., QRA2, QRA4.U, or QRA10)
• Approvals: CE Approved, compliant with DIN EN 298 and DIN EN 13611 standards
• Fan Control: Support for PWM fan motor control depending on parameterization

Applications

• Supervision of 1- or 2-stage gas forced draft burners of medium to high capacity.
• Industrial thermal process applications requiring precise combustion control.
• Commercial HVAC and boiler systems for heating and process steam.
• Atmospheric burners using gaseous or liquid fuels in industrial plants.
• Suitable for integration by Original Equipment Manufacturers (OEMs) into high-demand gas trains and burner systems.