LME71.111A1PKG-PRG22 Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG-PRG22 is a preprogrammed flame safeguard control package designed for the supervision of 1-stage or modulating gas and oil burners. This industrial-grade burner control system ensures safe operation by managing the burner startup sequence, monitoring the flame during operation, and initiating a safety shutdown in the event of a fault. The “PKG” designation indicates a complete assembly including the LME71.000A1 basic unit, the PME71.111A1 program module, and the necessary connector plug sets. This specific PRG22 version comes preprogrammed to support specific application parameters, facilitating easier integration into HVAC and industrial boiler systems.

Features

• Comprehensive monitoring of gas and oil flames using UV scanners or flame rods
• Integrated multicolor LED signal lamp for clear indication of operating states and fault notifications
• Built-in 3 x 7-segment display for real-time service, error, and status information
• Programmable purge timing and air pressure supervision with functional checks of the air pressure switch
• Support for Proof of Closure (POC) input to ensure safety shutoff valves are closed during startup
• Electrical remote lockout reset facility for improved operational flexibility
• Precise digital signal handling for accurate control sequences and timing
• BC interface for connecting external display units like the AZL2 or PC-based diagnostic tools

Specifications

• Model: LME71.111A1PKG-PRG22
• Operating Voltage: AC 120 V (50/60 Hz)
• Power Consumption: Approximately 12 VA
• Safety Class: I (with terminal base)
• Protection Rating: IP40 (when mounted)
• Operating Temperature Range: -20 C to +60 C
• Flame Supervision: UV detector (QRA series) or Flame Rod (ionization)
• Weight: Approximately 1.2 lbs to 5 lbs (depending on packaging and accessories)
• Approvals: UL, FM, CSA, and CE compliant
• Connector Type: Plug-in base with AGG3.710 terminal sets

Applications

• Supervision of forced draft gas or oil burners of medium to large capacity
• Implementation in 1-stage, direct-ignited, or pilot-ignited burner systems
• Suitable for industrial and commercial boilers and thermal process plants
• Used in systems requiring linkageless control or basic flame safeguard protection
• Ideal for HVAC applications requiring PWM fan motor control and air damper management