LME73.811A1PKG-PRG4 Siemens Flame Safeguard

Overview

The Siemens LME73.811A1PKG-PRG4 is a high-performance, microprocessor-based flame safeguard assembly designed for the startup and supervision of multistage or modulating forced draft gas or oil burners. This preprogrammed package includes the LME73.000A1 basic unit, the PME73.811A1 program module, and a complete connector plug set. It is engineered to provide flexible and cost-effective burner control, featuring integrated actuator control with closed-loop positioning for purge and ignition. The LME7 series is globally recognized for its reliability, offering advanced digital signal handling and a user-friendly interface for diagnostics and commissioning in industrial and commercial combustion systems.

Features

• Integrated Actuator Control: Directly controls Siemens SQM4 or SQM5 actuators for precise positioning during purge and ignition phases
• Digital Signal Handling: Ensures an accurate and repeatable control sequence for enhanced system safety
• Comprehensive Monitoring: Provides air pressure supervision with a functional check of the air pressure switch during start and operation
• Multi-color Diagnostics: Features a built-in LED display and multi-color signal lamps for real-time status messaging and error notifications
• Flexible Flame Supervision: Compatible with ionization probes and various UV detectors (such as QRA series) without requiring reconfiguration
• Advanced Connectivity: Includes a BC interface for connecting remote displays (AZL2) or PC software via OCI interface modules
• Safety Protocols: Incorporates undervoltage detection, electrical remote lockout reset, and Proof of Closure (POC) switch monitoring

Specifications

• Model: LME73.811A1PKG-PRG4
• Components: LME73.000A1 (Basic Unit), PME73.811A1 (Program Module), AGG3.710 (Plug Set)
• Mains Voltage: AC 120 V (50/60 Hz)
• Power Consumption: Approximately 12 VA
• Protection Rating: IP40 (when mounted correctly)
• Firing Rate Control: 4-20 mA, 0-135 Ohm, 0-10 Vdc, or 3-position control
• Flame-out Response Time: Factory set to 3 seconds (parameterizable to 1 second)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 5.0 lbs (package weight)
• Approvals: UL, FM, CSA, and CE

Applications

• Industrial and commercial forced draft gas or oil burners of medium to high capacity
• Modulating burner systems requiring integrated actuator control for fuel-air ratio management
• Atmospheric gas burners operating in intermittent cycles
• Packaged burner systems and applications utilizing ratio regulators or linkageless control
• HVAC and boiler systems requiring precise startup sequences and continuous safety supervision