LME73.831A2PKG Siemens Flame Safeguard

Overview

The Siemens LME73.831A2PKG is a comprehensive flame safeguard package designed for the supervision and control of medium to high-capacity forced draft gas or oil burners. This microprocessor-based unit provides sophisticated burner management by integrating the LME73.000A2 basic unit with a PME73.831A2 program module and a dedicated plug kit. Engineered for intermittent operation, it excels in managing complex combustion sequences, including integrated actuator control for precise fuel-air ratio adjustment. The LME73 series is known for its flexibility, allowing for closed-loop control to drive and prove actuator positions during critical purge and ignition phases.

Features

• Integrated actuator control via 3-position step signal or analog signal for precise linkageless control
• Digital signal handling ensures highly accurate and repeatable control sequences
• Multicolor LED signal lamp and 3×7-segment display for clear operating status, service, and error diagnostics
• Air pressure supervision with functional checks of the air pressure switch during startup and operation
• Comprehensive safety functions including undervoltage detection, restart limitation, and electrical remote lockout reset
• Global approvals including UL, FM, CSA, and CE for international compliance
• BC interface for seamless connection to external display units (AZL2) or PC-based service tools

Specifications

• Model: LME73.831A2PKG (Includes LME73.000A2 + PME73.831A2 + Plug Kit)
• Mains Voltage: AC 220 V – 230 V (50/60 Hz)
• Power Consumption: < 10 W
• Protection Rating: IP00 (requires proper installation housing)
• Operating Temperature: -20 C to +60 C
• Designed Lifetime: 250,000 burner startup cycles (approx. 10 years)
• Weight: Approximately 5.0 lbs (Full package weight)
• Dimensions: 12 x 8 x 8 inches (Package dimensions)

Applications

• Supervision of 1-stage or 2-stage gas or oil forced draft burners
• Modulating burner systems requiring integrated actuator control for air dampers
• Industrial and commercial boiler systems and thermal process plants
• Multi-burner applications requiring flexible, field-proven burner control
• Systems using ionization probes or Siemens QRA/QRB series flame detectors for flame supervision