LGK16.335A27 Siemens Flame Safeguard

Overview

The Siemens LGK16.335A27 is a high-performance, electronic burner control designed for the supervision of multi-stage or modulating gas, oil, or dual-fuel burners. Specifically engineered for medium to high-capacity industrial and commercial combustion plants, this flame safeguard is built for continuous operation (more than 24 hours without shutdown). It features a sophisticated self-checking flame supervision circuit that continuously monitors the flame signal, detector cables, and internal amplifier for faults. If a fault is detected that could simulate a flame signal, the controller initiates a safety lockout to prevent hazardous operating conditions.

Features

• Self-checking flame supervision circuit for maximum safety during continuous operation
• Integrated air pressure supervision to ensure correct air damper control during prepurge and operation
• Plug-in design allowing for easy installation and maintenance with compatible bases
• Robust construction with a shock-resistant and heat-resistant black plastic housing
• Visual indicators including a lockout indicator, fault signal lamp, and a manual reset button
• Integrated exchangeable unit fuse and a spare fuse located within the housing
• Compatible with ultraviolet (UV) flame detectors like the QRA53/QRA55 or ionization probes
• Certified to EN298 and CE standards for use in gas-fired and oil-fired applications

Specifications

• Model: LGK16.335A27
• Supply Voltage: AC 220 V – 240 V (50/60 Hz)
• Power Consumption: 3.5 VA
• Prepurge Time (t1): 37 seconds
• Ignition Safety Time (TSA): 2.5 seconds
• Pre-ignition Time (t3): 5 seconds
• Post-purge Time (t6): 15 seconds
• Interval to Air Pressure Check (t10): 10 seconds
• Protection Class: IP40 (when installed)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 1.1 kg (2.4 lbs)

Applications

• Supervision of multi-stage or modulating forced-draft burners of medium to high capacity
• Industrial and commercial combustion plants operating gas, oil, or dual-fuel systems
• Continuous operation burners in steam boilers, air heaters, and thermal process plants
• Retrofitting existing plants previously controlled by Siemens LFL1 series to add self-checking capabilities
• Systems requiring compliance with strict safety regulations like German TRD411/412 for steam boilers