LME71.111A1PKG-PRG26 Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG-PRG26 is a preprogrammed, microprocessor-based flame safeguard assembly designed for the startup and supervision of multistage or modulating forced draft gas burners in intermittent operation. This comprehensive package simplifies installation and commissioning by including the LME71.000A1 basic burner control unit, the PME71.111A1 program module, and a complete connector plug set. As a critical safety component, it manages the burner’s sequence of operation, including programmable purge and ignition cycles, while monitoring flame presence to prevent hazardous conditions in industrial and commercial heating applications.

Features

• Preprogrammed for standard gas burner sequences with a programmable purge function
• Integrated 3×7-segment display for clear service, error, and status information
• Multicolor LED signal lamp provides visual notifications for operations and fault status
• Reliable flame monitoring compatible with ionization probes or Siemens UV detectors (QRA2, QRA4, or QRA10)
• Advanced safety functions including undervoltage detection, air pressure supervision, and Proof of Closure (POC) switch monitoring
• Password-protected OEM parameters ensure secure configuration of safety-critical settings
• BC interface for connecting a remote AZL display or PC for enhanced diagnostics and parameterization

Specifications

• Model: LME71.111A1PKG-PRG26
• Operating Voltage: AC 120 V (50/60 Hz)
• Components Included: LME71.000A1 basic unit, PME71.111A1 program module, and Plug Kit
• Mounting: Plug-in base connection
• Safety Approvals: UL, FM, CSA, and CE certified
• Designed Lifetime: 250,000 burner startup cycles (approx. 10 years under normal operation)
• Degree of Protection: IP40 (when installed)
• Temperature Range: -20 C to +60 C

Applications

• Supervision of 1-stage or 2-stage gas forced draft burners
• Control of atmospheric gas burners in commercial and industrial combustion plants
• Integration into gas trains requiring air-gas ratio control and safety shut-off monitoring
• High-demand burner cycles in HVAC systems and industrial boiler applications
• Replacement or upgrade for legacy burner control systems requiring modern diagnostic capabilities