LME71.111A1PKG-PRG27 Siemens Flame Safeguard

Overview

The Siemens LME71.111A1PKG-PRG27 is a high-performance, microprocessor-based flame safeguard control package designed for the supervision and management of gas or oil burners. This specific model is a preprogrammed assembly that includes the LME71.000A1 base unit, a PME71.111A1 program module, and a complete connector plug set. It is engineered for the startup and supervision of 1- or 2-stage forced draft burners of medium to high capacity in intermittent operation. The system ensures combustion safety by monitoring flame signals via ionization probes or UV detectors and managing the burner sequence, including a programmable purge phase.

Features

• Comprehensive packaged assembly including base unit, program module, and plug kit for simplified installation
• Microprocessor-based digital signal handling for precise control sequences and timing
• Multicolor LED and optional remote LCD display (AZL2) for detailed status and diagnostic messaging
• Integrated programmable purge and electrical remote lockout reset capability
• Built-in proof of closure (POC) input to monitor valve positioning for enhanced safety
• Support for multiple flame detection methods including ionization probes and UV flame detectors (e.g., QRA series)
• Undervoltage detection and password-protected parameter settings for secure operation
• Designed for a long service life of approximately 250,000 burner startup cycles

Specifications

• Model Number: LME71.111A1PKG-PRG27
• Mains Voltage: AC 120 V (50/60 Hz)
• Power Consumption: Approximately 12 VA
• Response Time: 3 seconds (loss of flame)
• Protection Rating: IP40 (when mounted)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 1.2 to 1.7 lbs
• Dimensions: Approximately 12 x 8 x 8 inches (packaged)
• Approvals: UL, FM, CSA, and CE compliant

Applications

• Supervision of 1-stage or 2-stage gas forced draft burners in commercial and industrial heating
• Control and monitoring of atmospheric gas burners and modulating forced draft burners
• Industrial thermal process applications requiring high-capacity burner management
• Integration into complex gas trains for HVAC and boiler systems
• Suitable for intermittent operation where the burner must be shut down at least once every 24 hours