LME71.111A1PKG Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG is a comprehensive flame safeguard assembly designed for the startup and supervision of 1-stage, direct or pilot ignited forced draft burners. This 110V AC microprocessor-based control unit ensures reliable combustion management in medium to large capacity gas or oil burner applications. The package is a pre-assembled kit that includes the LME71.000A1 basic unit, the PME71.111A1 program module, and the AGG3.710 connector plug set, facilitating an easier installation process for industrial and commercial heating systems.

Features

• Multi-color LED signal lamp provides clear indication of operating status, program sequences, and fault messages
• Integrated 3 x 7-segment display for service, error, and status information
• Built-in 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 to protect equipment from unstable power conditions
• BC interface for connecting a remote display (AZL2) or PC (ACS410) for advanced diagnostics
• Proof of Closure (POC) input for enhanced safety monitoring of fuel valves
• Digital signal handling ensures highly accurate control sequences

Specifications

• Model: LME71.111A1PKG
• Operating Voltage: AC 120 V (+10% / -15%)
• Mains Frequency: 50…60 Hz (+/- 6%)
• Power Consumption: Approximately 12 VA
• Safety Class: I
• Protection Rating: IP40 (when mounted)
• Response Time on Flame Loss: 1 second or 3 seconds (parameterizable)
• Operation: Intermittent (controlled shutdown every 24 hours)
• Approvals: UL, FM, CSA, CE, and RoHS compliant

Applications

• Supervision of 1-stage forced draft gas or oil burners
• Ideal for industrial thermal process plants adhering to EN746-2 standards
• Suitable for atmospheric gas burners and modulating burners of medium to large capacity
• Used in commercial HVAC boiler systems requiring precise flame safeguard control
• Compatible with ionization probes and various Siemens flame detectors (QRA2, QRA4, QRA10, QRB, or QRC)