LGK16.333A27 Siemens Flame Safeguard

Overview

The Siemens LGK16.333A27 is a high-performance gas burner control unit designed for the supervision of multi-stage or modulating forced draft burners of medium to high capacity. Engineered for continuous operation, this flame safeguard features a self-checking flame signal amplifier that ensures maximum safety by detecting faults in the flame detector, cables, or the signal amplifier itself. It is a versatile solution for industrial and commercial combustion plants, providing precise control and reliable monitoring of gas, oil, or dual-fuel burners.

Features

• Self-checking flame supervision circuit for continuous operation safety
• Designed for gas, oil, or dual-fuel forced draft burners
• Supports multistage or modulating burner configurations
• Integrated air pressure supervision for air damper control
• Compatible with QRA53 and QRA55 UV flame detectors or ionization probes
• Fail-safe design initiates safety actions upon premature or missing flame signals
• Plug-in design with a durable, heat-resistant black plastic housing
• High-precision control with fast response times for burner setting changes

Specifications

• Model: LGK16.333A27
• Mains Voltage: AC 230 V (-15% to +10%)
• Mains Frequency: 50…60 Hz
• Power Consumption: 3.5 VA
• Pre-purge Time (t1): 31.5 seconds
• Ignition Safety Time (TSA): 3 seconds
• Pre-ignition Time: 6 seconds
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 0.835 kg to 1.0 kg
• Lifetime: 250,000 startup cycles (approx. 10 years)

Applications

• Continuous operation burners in industrial and commercial settings
• Intermittent burners that may operate for more than 14-24 hours under high demand
• Steam boiler plants requiring compliance with TRD 411 and TRD 412 regulations
• Forced draft burners for gas, oil, or dual-fuel applications
• Direct-fired air heaters (WLE) and boiler sequencing systems