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


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