LME71.901A1PKG-PRG7 Siemens Flame Safeguard

Overview

The Siemens LME71.901A1PKG-PRG7 is a comprehensive, preprogrammed flame safeguard package designed for the supervision and control of gas burners. This microprocessor-based burner control unit ensures safe operation by managing the burner startup, monitoring the flame during operation, and controlling safety shutoff valves. This specific “PKG” model comes as a complete assembly, including the LME71.000A1 base unit, a pre-installed PME71.901A1 program module specifically for PWM fan applications, and a connector plug set. It is engineered for industrial thermal process applications and forced draft burners, providing a flexible and cost-effective solution for burner supervision.

Features

• Integrated PWM fan motor control via a 3-position controller or analog signal for burners with pneumatic ratio control
• Preprogrammed for PWM fan applications, reducing commissioning time
• Multicolor LED signal lamp provides clear indication of operating status, program sequences, and error messages
• Built-in 3×7-segment display for local service, error, and status information
• Dual flame supervision capability supporting both UV scanners (QRA series) and ionization flame rods
• Advanced safety functions including integrated valve proving and proof of closure (POC) input
• Electrical remote lockout reset facility for convenient system management
• BC interface for connecting a remote AZL2 display or PC for advanced diagnostics and parameterization

Specifications

• Model: LME71.901A1PKG-PRG7
• Mains Voltage: AC 120 V (50/60 Hz)
• Power Consumption: Approximately 3 VA
• Degree of Protection: IP40 (when mounted)
• Operating Temperature: -20 C to +60 C
• Design Lifetime: 250,000 burner startup cycles (approx. 10 years)
• Approvals: UL, FM, CSA, and CE
• Weight: Approximately 5.0 lbs (2.27 kg)
• Components Included: LME71.000A1 base unit, PME71.901A1 program module, and AGG3.710 connector set

Applications

• Supervision of multistage or modulating forced draft gas burners in intermittent operation
• Industrial thermal process plants and high-capacity commercial boiler systems
• Burner systems requiring pulse width modulated (PWM) fan control and pneumatic ratio control
• Multi-burner configurations requiring independent safety interlocks and fault indication
• HVAC applications necessitating reliable flame safety with integrated valve proving and air pressure supervision