LME71.901A1PKG-PRG5 Siemens Flame Safeguard

Overview

The Siemens LME71.901A1PKG-PRG5 is a high-performance, microprocessor-based flame safeguard assembly designed for the startup and supervision of multistage or modulating forced draft gas burners. This preassembled package includes the LME71.000A1 basic burner control unit, the PME71.901A1 program module, and a complete connector plug set. It is specifically engineered for burners utilizing pulse width modulated (PWM) fans and pneumatic fuel-air ratio control. By providing critical safety functions such as flame monitoring and valve control, this unit ensures reliable operation in industrial and commercial thermal process applications.

Features

• Preprogrammed for PWM fan applications with pneumatic ratio control
• Integrated valve proving (leakage test) capability for enhanced safety
• Includes Proof of Closure (POC) input to monitor valve status
• Multicolor LED signal lamp provides clear indication of operating and error status
• BC interface allows for connection to an AZL2 display or PC for parameter adjustment
• Accurate control sequence and digital signal handling for high precision
• Electrical remote lockout reset facility for convenient system management
• Air pressure supervision with functional checks during startup and operation

Specifications

• Model: LME71.901A1PKG-PRG5
• Mains Voltage: AC 120 V (+10% / -15%)
• Mains Frequency: 50…60 Hz (+/- 6%)
• Power Consumption: Approximately 12 VA
• Safety Class: I (with PME7)
• Protection Rating: IP00 (requires proper installation in housing)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 1.2 lbs (0.54 kg)
• Approvals: UL, FM, CSA listed

Applications

• Supervision of multistage or modulating forced draft gas burners
• Industrial thermal process plants and high-capacity combustion systems
• Burner systems requiring PWM fan motor control
• Atmospheric gas burners with intermittent operation cycles
• Integration with Siemens UV flame detectors (QRA series) or ionization probes