LMO14.111C2 Siemens Burner Control

Overview

The Siemens LMO14.111C2 is a microcontroller-based oil burner control designed for the startup, supervision, and control of forced draft oil burners in intermittent operation. This compact unit is specifically engineered for single-stage burners with an oil throughput of up to 30 kg/h. It serves as a modern, digitally controlled replacement for legacy LOA series burner controls, offering enhanced safety through features like undervoltage detection and accurate signal handling. The device integrates a flame signal amplifier and a multicolor LED for clear status and fault diagnostics.

Features

• Microprocessor-controlled sequence for accurate and reproducible timing
• Undervoltage detection that triggers safety shutdown if power levels drop below a safe threshold
• Electrical remote reset capability for convenient system restoration
• Integrated bridging contact and monitoring for oil preheaters
• Multicolor LED indication providing real-time operational status and detailed fault code messages
• Limitation of repetitions to ensure safety during multiple startup failures
• Controlled intermittent operation forcing a restart after 24 hours of continuous use to verify safety functions
• Impact-proof and heat-resistant plastic housing with a plug-in design for easy installation

Specifications

• Model: LMO14.111C2
• Supply Voltage: AC 230 V (+10% / -15%), 50/60 Hz
• Burner Capacity: Up to 30 kg/h
• Power Consumption: Approximately 12 VA
• Safety Time (TSA): 10 seconds
• Pre-purge Time (t1): 16 seconds
• Pre-ignition Time (t3): 15 seconds
• Post-ignition Time (t3n): 3 seconds (or up to 10 seconds depending on application)
• Protection Rating: IP40
• Operating Temperature: -5 C to +60 C
• Weight: Approximately 0.2 kg

Applications

• Supervision of single-stage forced draft oil burners in intermittent operation
• Use with atomization oil burners of monoblock design according to EN 230
• Compatible with yellow-burning flame supervision via QRB photo-resistive detectors
• Compatible with blue-burning flame supervision via QRC blue-flame detectors
• Residential and commercial heating systems requiring reliable safety shut-off control
• Suitable for replacing legacy Siemens/Landis & Gyr LOA24.171, LOA26.171, and LOA36.171 models