LME71.112A2PKG Siemens Flame Safeguard

Overview

The Siemens LME71.112A2PKG is a comprehensive, microprocessor-based burner control assembly designed for the supervision and management of 1- or 2-stage gas forced draft burners in intermittent operation. This package comes preassembled for convenience, featuring the LME71.000A2 basic unit, a PME71.112A2 programming module, and a complete connector plug kit. Engineered for industrial and commercial thermal process applications, it ensures combustion safety by managing the startup sequence and monitoring flame strength via ionization probe or UV flame detectors.

Features

• Microprocessor-based digital signal handling for high-precision control sequences
• Multicolor LED signal lamp provides clear status and error messages
• Integrated 3 x 7-segment display for local service and diagnostic information
• Proof of Closure (POC) input for monitoring gas valve status to ensure safety
• Undervoltage detection and electrical remote lockout reset facility
• Air pressure supervision with functional checks of the air pressure switch during startup and operation
• BC interface allows for connection to an AZL2 display or PC for advanced parameterization
• Durable design with a lifetime of approximately 250,000 burner startup cycles

Specifications

• Model: LME71.112A2PKG
• Operating Voltage: AC 230 V (50/60 Hz)
• Components Included: LME71.000A2 basic unit, PME71.112A2 program module, and plug kit
• Operation Type: Intermittent (at least one controlled shutdown every 24 hours)
• Flame Detection: Ionization probe or UV flame detectors (QRA2, QRA4, or QRA10)
• Power Consumption: Approximately 12 VA
• Protection Rating: IP40 (when mounted correctly)
• Temperature Range: -20 C to +60 C

Applications

• Supervision of 1- or 2-stage gas forced draft burners of medium to high capacity
• Management of atmospheric gas burners in industrial thermal process applications
• Control of burners with or without fan pressure supervision
• Integration by Original Equipment Manufacturers (OEMs) into heating systems and gas trains
• Suitable for HVAC and boiler systems requiring linkageless control and precise safety monitoring