LME73.812A1PKG-PRG3 Siemens Flame Safeguard

Overview

The Siemens LME73.812A1PKG-PRG3 is a high-performance, microprocessor-based burner control and flame safeguard assembly designed for the supervision of multistage or modulating forced draft gas and oil burners. This specific package includes the LME73.000A1 basic unit, the PME73.812A1 program module, and a complete plug set. It is engineered to provide precise control over the startup and operation of medium to high-capacity burners, featuring integrated actuator control with an independent ignition position above the low-fire setting. The PRG3 designation indicates the unit is preprogrammed for specific application parameters, ensuring a streamlined installation process for industrial and commercial combustion systems.

Features

• Integrated actuator control via 3-position controller or analog signal for precise fuel-air ratio management
• Independent ignition load setting allows for ignition positions located above the low-fire setpoint
• Digital signal handling ensures accurate control sequences and repeatable timing
• Comprehensive diagnostics via a built-in 3×7-segment LED display for service, error, and status information
• Multicolor signal lamp for immediate visual notification of operating and fault status
• Advanced safety functions including undervoltage detection and air pressure supervision with functional checks
• Flexible flame supervision compatible with ionization probes or various UV and photo-resistive detectors
• BC interface for seamless connection to AZL2 display units or PC-based service tools

Specifications

• Model: LME73.812A1PKG-PRG3
• Mains Voltage: AC 120 V (+10% / -15%)
• Mains Frequency: 50 to 60 Hz (+/- 6%)
• Power Consumption: Approximately 12 VA
• Safety Response Time (Flame Loss): Less than 3 seconds
• Protection Rating: IP40 (when mounted, ensuring suitability for typical burner environments)
• Temperature Range: -20 C to +60 C (-4 F to +140 F)
• Operation: Intermittent (at least one controlled shutdown every 24 hours)
• Mounting: Modular design for base or cabinet installation

Applications

• Supervision of modulating or multistage forced draft gas and oil burners in industrial boiler rooms
• Management of atmospheric gas burners requiring advanced safety interlocks
• Control of combustion processes in large-scale heating plants and furnaces
• Integration into linkageless burner management systems using SQM4 or SQM5 actuators
• Suitable for applications requiring precise independent ignition positioning for optimal burner start-up sequences