LFL1.133-110V Siemens Gas Burner Control

Overview

The Siemens LFL1.133-110V is a high-performance electro-mechanical primary flame safeguard control designed for the sequencing and supervision of gas, oil, or dual-fuel forced draft burners. Specifically engineered for flash-steam generators and burners of medium to high capacity, this unit ensures safe operation through automatic ignition and continuous flame monitoring. It is designed for intermittent operation, requiring at least one controlled shutdown every 24 hours to perform necessary safety self-checks.

Features

• Comprehensive burner sequencing and automatic ignition control
• Continuous flame monitoring with support for UV detectors or ionization probes
• Integrated flame signal amplifier and sequencer in a single compact unit
• Visual sequence indication via an indicator dial visible through the front window
• Integrated lockout reset button and status indicator light
• Checked air damper control for high fire purge and low fire ignition interlocks
• Built-in unit fuse and spare fuse for electrical protection
• Durable, impact-resistant plastic housing designed for plug-in mounting

Specifications

• Supply Voltage: 110 VAC (+10% / -15%), 50/60 Hz
• Pre-purge Time (t1): Approximately 8 to 9 seconds
• Safety Time (TSA): 3 seconds
• Post-purge Time (t9): 3 seconds
• Power Consumption: 3.5 VA
• Protection Rating: IP40
• Operating Temperature: -5°F to 140°F (-20°C to +60°C)
• Internal Fuse: 6.3A (slow)
• External Fuse: Maximum 10A (slow)
• Weight: Approximately 2.2 lbs (1.0 kg)

Applications

• Supervision of forced draft gas, oil, or dual-fuel burners
• Specifically optimized for flash-steam generators
• Suitable for multistage or modulating burners in intermittent operation
• Used in industrial and commercial HVAC systems and stationary air heaters
• Compatible with Siemens QRA series UV flame detectors and flame rods