LME71.111A1PKG-PRG20 Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG-PRG20 is a preprogrammed, microprocessor-based flame safeguard assembly designed for the supervision of 1-stage or 2-stage gas forced draft burners. This high-performance burner control unit provides a flexible and cost-effective solution for industrial and commercial combustion systems. The package typically consists of the LME71.000A1 base unit, a PME71.111A1 programming module, and a connector plug set. This specific model features preprogrammed parameters to ensure reliable safety shut-off control and integrated diagnostics, facilitating easier installation and commissioning in thermal process applications.

Features

• Comprehensive monitoring of burner startup, operation, and shutdown phases
• Integrated multicolor LED signal lamp for status, fault notifications, and diagnostic messages
• Programmable purge times and safety times to meet specific application requirements
• Proof of Closure (POC) input to ensure gas valves are fully closed before ignition
• Dual flame detection capabilities supporting both UV scanners and ionization flame rods
• Digital signal handling for precise control sequences and repeatable timing
• Electrical remote lockout reset facility for convenient system management
• Air pressure supervision with built-in function checks during startup and operation
• Undervoltage detection and automatic restart limitation for enhanced system protection

Specifications

• Model: LME71.111A1PKG-PRG20
• Mains Voltage: AC 120 V (+10% / -15%)
• Frequency: 50/60 Hz
• Power Consumption: Approximately 12 VA
• Protection Rating: IP40 (when mounted)
• Response Time: 1 second or 3 seconds (parameterizable)
• Operation: Intermittent (at least one controlled shutdown every 24 hours)
• Mounting: Plug-in base connection
• Weight: Approximately 1.2 lbs to 1.68 lbs
• Approvals: UL, FM, CSA, and CE

Applications

• Supervision of 1-stage or 2-stage gas forced draft burners
• Industrial thermal process plants and heating applications
• Atmospheric burners of medium to large capacity
• Pilot or direct ignition gas burner systems
• HVAC and commercial boiler systems requiring advanced flame safety control
• Use in systems requiring linkageless control or integration with external displays like the AZL23