LME71.402A1PKG Siemens Flame Safeguard

Overview

The Siemens LME71.402A1PKG is a comprehensive flame safeguard package designed for the startup and supervision of multistage or modulating forced draft burners and atmospheric gas burners in intermittent operation. This assembly includes the LME71.000A1 basic unit, the PME71.402A1 program module, and a complete connector plug kit. As a microprocessor-based burner control unit, it ensures combustion safety by monitoring the flame via a UV scanner or flame rod and managing the energization of safety shutoff valves. It is ideally suited for industrial thermal process applications where high-capacity burner supervision and programmable safety parameters are required.

Features

• Includes LME71.000A1 base unit, PME71.402A1 program module, and AGG3.710 connector plug set
• Digital signal handling for accurate control sequences and high-precision timing
• Multicolor LED display for clear indication of operating status, program sequence, and fault notifications
• Integrated air pressure supervision with a functional check of the air pressure switch during start and operation
• Electrical remote lockout reset facility for convenient system management
• Undervoltage detection and protection mechanism
• Modular design allows for optional connection to AZL23 display units for enhanced status information and parameter adjustment
• Proof of Closure (POC) input to monitor gas valve positions for enhanced safety

Specifications

• Model: LME71.402A1PKG
• Mains Voltage: AC 120 V (50/60 Hz)
• Power Consumption: Approximately 12 VA
• Designed Lifetime: 250,000 burner startup cycles (approx. 10 years)
• Safety Class: Protection rating of IP40 (when mounted)
• Operating Temperature: -20 C to +60 C
• Inputs: Support for UV flame detectors (QRA series) and ionization probes (flame rods)
• Approvals: UL, FM, and CSA certified

Applications

• Supervision of multistage or modulating forced draft gas and oil burners
• Atmospheric gas burners of medium to high capacity
• Industrial thermal process applications and high-demand HVAC systems
• Burner configurations utilizing air damper actuators for mechanical or pneumatic fuel-air ratio control
• Applications requiring programmable purge cycles and integrated valve proving functions