LME71.111A1PKG-PRG15 Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG-PRG15 is a high-performance, microprocessor-based flame safeguard control system designed for the supervision and management of forced draft burners. This specific package comes pre-programmed and includes the LME71.000A1 base unit, the PME71.111A1 program module, and a complete connector plug set. It is engineered to manage burner startup and continuous operation, ensuring safety by monitoring the flame and controlling fuel-air ratios via air damper actuators or PWM fans.

Features

• Comprehensive safety supervision for single or dual-fuel forced draft burners
• Pre-programmed PME71.111A1 module with adjustable purge settings
• Integrated 3×7-segment display for local service, error, and status diagnostics
• Multicolor LED signal lamp for immediate visual notification of operating states and faults
• Proof of Closure (POC) input for enhanced valve safety monitoring
• Digital signal processing for high-precision timing and control sequences
• Remote reset capability and password-protected parameter settings for OEM security
• BC interface for connection to PC software (ACS410) or remote display units (AZL2)

Specifications

• Model: LME71.111A1PKG-PRG15
• Operating Voltage: AC 120 V (50/60 Hz)
• Power Consumption: Approximately 12 VA
• Protection Rating: IP40 (when mounted correctly)
• Safety Class: I
• Operating Temperature: -20 C to +60 C
• Design Lifetime: 250,000 burner startup cycles (approx. 10 years)
• Flame Detection: Ionization probe or UV flame detectors (e.g., QRA series)
• Mounting: Plug-in base design for easy installation and maintenance

Applications

• Supervision of medium to high-capacity forced draft gas and oil burners
• Management of 1-stage or 2-stage burner sequences in intermittent operation
• Linkageless fuel-air ratio control in HVAC and industrial boiler systems
• Atmospheric gas burners requiring precise startup and safety shut-off control
• Burner systems requiring PWM fan control for modulating operation