LME73.840A1PKG-PRG3 Siemens Flame Safeguard

Overview

The Siemens LME73.840A1PKG-PRG3 is a comprehensive flame safeguard assembly designed for the supervision and control of medium to large-capacity industrial and commercial burners. This microprocessor-based unit is specifically engineered for intermittent operation, managing the startup and monitoring of gas or oil forced-draft burners. The package is preprogrammed and typically includes the LME73.000A1 basic unit, the PME73.840A1 program module, and a complete plug kit to facilitate installation. It provides critical safety functions, including integrated valve proving and closed-loop actuator control to ensure precise purge and ignition positions.

Features

• Integrated valve proving functionality can be parameterized to meet specific safety requirements
• Closed-loop actuator control drives and proves the position for purge and ignition sequences
• Digital signal handling ensures accurate control sequences and reliable timing
• Multicolor LED status indicator provides clear visual feedback for operation, recycle, and fault notifications
• Undervoltage detection and electrical remote lockout reset facility for enhanced system protection
• Modular design allows for flexible integration with various burner management components
• Air pressure supervision with a built-in function check of the air pressure switch during start and operation

Specifications

• Model: LME73.840A1PKG-PRG3
• Mains Voltage: AC 120 V (50/60 Hz)
• Power Consumption: Approximately 10 W
• Protection Rating: IP00 (must be mounted in a suitable enclosure)
• Included Module: PME73.840A1
• Operating Mode: Intermittent (at least one controlled shutdown every 24 hours)
• Weight: Approximately 5.0 lbs (package weight)
• Dimensions: 12 x 8 x 8 inches (package dimensions)

Applications

• Management of 1-stage or modulating forced-draft gas and oil burners
• Commercial and industrial boiler rooms, furnaces, and thermal processing plants
• Systems requiring integrated valve proving and precise linkageless actuator control
• Burners adhering to international safety standards like EN 676
• HVAC installations where flame supervision via ionization probe or UV detectors (such as QRA series) is required