LME71.111A1PKG-PRG11 Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG-PRG11 is a preprogrammed flame safeguard assembly designed for the supervision of 1-stage or modulating forced draft gas or oil burners. This package typically includes the LME71.000A1 basic unit, a PME71.111A1 program module, and a complete connector plug set. It serves as a critical safety controller, managing burner startup and monitoring the flame via an ionization probe or UV flame detector to prevent hazardous conditions. The “PRG11” designation indicates a specific preprogrammed parameter set, likely tailored for common industrial or commercial burner applications.

Features

• Comprehensive flame supervision using ionization probes or various UV and photo-resistive detectors
• Integrated three-color LED signal lamp for clear indication of operating status and error messages
• Built-in 3×7-segment display providing real-time service, error, and status information
• Accurate digital signal handling ensures precise control sequences and repeatable performance
• Air pressure supervision with a functional check of the air pressure switch during startup and operation
• Electrical remote lockout reset facility for convenient system management
• Undervoltage detection and restart limitation for enhanced equipment protection
• BC interface for connecting an operator display (AZL2) or a PC for advanced configuration

Specifications

• Model: LME71.111A1PKG-PRG11
• Operating Voltage: 110V AC to 120V AC (50/60 Hz)
• Program Sequence: Includes programmable purge and Proof of Closure (POC) input
• Power Consumption: Approximately 12 VA
• Protection Rating: IP40 (when installed correctly)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 1.68 lbs to 5 lbs (depending on packaging)
• Dimensions: Typically 12 x 8 x 8 inches in shipping configuration
• Approvals: UL, FM, and CSA certified

Applications

• Supervision of 1-stage or modulating forced draft gas and oil burners
• Used in atmospheric gas burners and medium to large-capacity combustion systems
• Integration into HVAC systems, boilers, and industrial thermal process plants
• Suitable for systems requiring electronic fuel-air ratio control via air damper actuators
• High-demand or intermittent burner operations where safety shut-off and monitoring are required