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


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