LFL1.322-110V Siemens Gas Burner Control

Overview

The Siemens LFL1.322-110V is a high-performance, electro-mechanical gas burner control unit designed for the safe supervision and control of forced draft burners. Specifically engineered for stationary air heaters, it provides comprehensive flame safeguard functionality for gas, oil, or dual-fuel burners of medium to high capacity. This unit manages the entire burner sequencing process, including automatic ignition, flame proving, and controlled shutdown, ensuring optimal safety in industrial and commercial heating systems.

Features

• Primary flame safeguard for intermittent operation (at least one controlled shutdown every 24 hours)
• Integrated flame signal amplifier and purge timer in a single compact unit
• Visual sequence indicator dial visible through the front window for easy monitoring
• Self-checking air damper control to ensure correct positioning during startup
• Supports flame supervision via UV detectors (QRA series) or ionization probes
• Built-in reset button and lockout indicator lamp for efficient fault management
• Durable shock- and heat-resistant plastic housing with a plug-in design for easy installation
• Global safety compliance with UL, FM, and CSA certifications

Specifications

• Model: LFL1.322-110V
• Operating Voltage: AC 100-110 V (50/60 Hz)
• Power Consumption: 3.5 VA
• Pre-purge Time (t1): 36 seconds
• Safety Time (TSA): 2 seconds
• Post-purge Time (t9): 2 seconds
• Internal Fuse: 6.3A (slow)
• Protection Rating: IP40
• Weight: Approximately 2.2 lbs (1.0 kg)

Applications

• Supervision of forced draft gas and oil burners in industrial heating plants
• Control of multistage or modulating burners in stationary air heaters
• Suitable for use with dual-fuel burners and expanding flame or interrupted pilot constructions
• Ideal for HVAC systems requiring reliable burner sequencing and flame monitoring
• Integration into original equipment manufacturer (OEM) burner products for commercial use