LME71.111A1PKG-PRG19 Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG-PRG19 is a specialized, preprogrammed flame safeguard control package designed for the startup and supervision of 1-stage, direct or pilot ignited gas burners. This microprocessor-based unit provides critical safety functions by managing the burner sequence and monitoring the flame to prevent unsafe combustion conditions. The “PKG” designation indicates a complete assembly that includes the LME71.000A1 basic unit, a PME71.111A1 program module, and the necessary AGG3.710 connector plug sets. This specific PRG19 version comes preprogrammed to streamline installation and commissioning for compatible industrial and commercial heating applications.

Features

• Comprehensive flame supervision using an ionization probe or UV flame detectors such as the QRA series
• Integrated program sequence display via a 3 x 7-segment display for service and status information
• Multicolor LED signal lamp provides clear visual indication of operating states and error messages
• Electrical remote lockout reset facility for convenient system management
• Air pressure supervision with a functional check of the air pressure switch during startup and operation
• Digital signal handling ensures an accurate and repeatable control sequence
• Built-in BC interface for connecting external display units like the AZL2 or a PC for advanced parameterization
• Undervoltage detection and restart limitation for enhanced system protection

Specifications

• Model: LME71.111A1PKG-PRG19
• Operating Voltage: AC 120 V (50/60 Hz)
• Component Composition: LME71.000A1 Basic Unit + PME71.111A1 Program Module + AGG3.710 Plug Set
• Power Consumption: Approximately 12 VA
• Protection Rating: IP40 (when mounted)
• Operating Temperature: -20 C to +60 C
• Safety Class: I
• Approvals: UL, FM, CSA, and CE compliant
• Timing: Programmable purge time included in the sequence

Applications

• Supervision of multistage or modulating forced draft burners
• Atmospheric gas burners in intermittent operation (at least one controlled shutdown every 24 hours)
• Industrial and commercial combustion plants requiring proof of closure (POC) input
• Gas-fired equipment using 1-stage direct or pilot ignition
• Systems requiring precise linkageless control when paired with appropriate actuators and sensors