LME71.111A1PKG-PRG5 Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG-PRG5 is a preprogrammed, microprocessor-based flame safeguard control assembly designed for the supervision of 1-stage, direct or pilot ignited forced draft gas or oil burners. This package is built around the LME71 base unit and includes a PME71.111A1 program module and an AGG3.710 connector plug set. It serves as a critical safety device, managing burner startup and continuous operation while ensuring that safety shutoff valves are energized only when a flame is safely monitored. The “PRG5” designation indicates a specific preprogrammed configuration, likely related to purge timing or safety parameters, to provide a ready-to-install solution for industrial thermal process applications.

Features

• Comprehensive assembly including the LME71.000A1 burner control, PME71.111A1 program module, and connector plug set
• Integrated multicolor LED display providing status messages, program sequences, and detailed fault notifications
• Dual flame monitoring capabilities supporting both UV scanners and flame rods
• Advanced digital signal handling for accurate control sequences and high repeatability
• Built-in undervoltage detection and electrical remote lockout reset facility
• Proof of Closure (POC) input to monitor gas valve positions for enhanced combustion safety
• Air pressure supervision with a functional check of the air pressure switch during start and operation
• Modbus communication and remote display options available for expanded system integration

Specifications

• Model: LME71.111A1PKG-PRG5
• Mains Voltage: 120 V AC (50/60 Hz)
• Control Type: Intermittent operation (controlled shutdown every 24 hours)
• Housing: Compact design with plug-in base for easy installation
• Approvals: UL listed, FM approved, and CSA certified
• Weight: Approximately 1.68 lbs (0.76 kg)
• Protection: IP40 (ensure proper installation environment)
• Inputs: UV scanner, flame rod, and air pressure switch

Applications

• Supervision of multistage or modulating forced draft oil or gas burners of medium to large capacity
• Industrial thermal process applications requiring precise burner control and safety monitoring
• Management of 1-stage direct or pilot ignited burners in HVAC and boiler systems
• Systems requiring linkageless or basic burner control with programmable purge cycles
• Upgrade or replacement of legacy burner control units in existing combustion plants