LME71.111A1PKG-PRG1 Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG-PRG1 is a preprogrammed, high-performance flame safeguard assembly designed for the supervision and management of 1-stage, gas or oil forced-draft burners. This unit acts as a burner control system, ensuring safety by monitoring the flame and managing the startup and continuous operation sequences. It is a packaged assembly that typically includes the LME71.000A1 base unit, the PME71.111A1 program module, and a complete connector plug set. This specific “PRG1” version is preconfigured to provide a basic flame safeguard package with adjustable purge, making it a critical safety component for medium to large-capacity industrial thermal processes and commercial heating applications.

Features

• Comprehensive flame supervision using either a UV flame detector or a flame rod
• Integrated multicolor LED signal lamp for clear indication of operating states and fault notifications
• Digital signal handling for highly accurate and repeatable control sequences
• Built-in 3 x 7-segment display for real-time service, error, and status information
• Adjustable purge time and programmable safety parameters to customize the unit for specific application needs
• Electrical remote lockout reset facility and undervoltage detection for enhanced safety and convenience
• Proof of Closure (POC) input to monitor and ensure gas valves are 100% closed before ignition
• Air pressure supervision with a functional check of the air pressure switch during start and operation
• BC interface allows for connection to an AZL23 remote display or PC for advanced diagnostics and parameter setting

Specifications

• Model: LME71.111A1PKG-PRG1
• Operating Voltage: AC 120 V (+10% / -15%)
• Frequency: 50/60 Hz
• Power Consumption: Approximately 12 VA
• Protection Rating: IP40 (when mounted)
• Operating Temperature Range: -20 C to +60 C
• Safety Time (TSA): Program-dependent (based on PME71 module)
• Flame Detection: UV scanner or flame rod (ionisation)
• Approvals: UL, FM, CSA, and CE approved
• Housing: Impact-resistant, heat-resistance plastic

Applications

• Supervision of 1-stage forced-draft gas or oil burners in commercial and industrial settings
• Ideal for use in industrial thermal process plants and large-scale boiler systems
• Direct or pilot-ignited burner systems requiring precise sequence control
• Integration into gas trains for HVAC equipment where adjustable purge cycles are necessary
• Applications requiring Proof of Closure monitoring for high-security safety standards