LME71.901A1-PRG6 Siemens Flame Safeguard

Overview

The Siemens LME71.901A1-PRG6 is a high-performance burner control flame safeguard assembly designed for the supervision of multistage or modulating forced draft burners and atmospheric gas burners. This specific unit comes preassembled for convenience, featuring the LME71.000A1 base unit paired with the PME71.901A1 programming module. It is engineered for industrial and commercial thermal process applications, specifically those requiring pulse width modulation (PWM) fan control. The system ensures reliable startup and continuous supervision, monitoring the flame to manage safety shutoff valves and prevent hazardous conditions during intermittent operation.

Features

• PWM blower control for burners with pneumatic ratio control or pulse width modulated fans
• Integrated valve proving (VPS) for enhanced system safety and leakage detection
• Digital signal handling ensures accurate control sequences and high repeatability
• Multicolor LED indicator provides clear status messages, program sequences, and fault notifications
• Proof of Closure (POC) input for monitoring that the gas valve is fully closed
• Compatible with multiple flame detection methods, including ionization probes and non-self-checking UV scanners
• Electrical remote lockout reset facility for efficient system management
• Undervoltage detection and air pressure supervision with functional checks during start and operation

Specifications

• Model: LME71.901A1-PRG6 (Assembly: LME71.000A1 base + PME71.901A1 module)
• Mains Voltage: AC 120 V (50/60 Hz)
• Operating Mode: PWM blower control with direct spark ignition
• Power Consumption: Approximately 12 VA
• Protection Rating: IP40 (when mounted)
• Operating Temperature: -20 C to +60 C
• Safety Time (TSA): Defined by PME71 module parameters
• Approvals: UL, FM, CSA, and CE globally approved
• Weight: Approximately 1.2 to 5.0 lbs (depending on packaging and additional plug sets)

Applications

• Supervision of forced draft gas burners of medium to large capacity
• Industrial thermal process plants and heating equipment management
• Burners requiring linkageless control via PWM fan speed adjustment
• HVAC and boiler systems requiring intermittent operation (controlled restart every 24 hours)
• Direct spark ignition systems with valve proving requirements
• Integration into gas trains for commercial and industrial combustion applications