LMO24.011C2 Siemens Burner Control

Overview

The Siemens LMO24.011C2 is a microcontroller-based oil burner control designed for the startup, supervision, and control of forced draft oil burners in intermittent operation. Specifically engineered for use with flash-steam generators, this unit manages burners with an oil throughput of up to 30 kg/h. It utilizes digital signal handling to provide an accurate and reproducible control sequence, ensuring safe combustion by monitoring flame conditions and managing ignition cycles. The LMO24.011C2 is a service-compatible replacement for the legacy LOA24.571 series, featuring a plug-in design for easy installation and maintenance.

Features

• Microprocessor-controlled for precise and repeatable timing sequences
• Designed for 2-stage forced draft oil burners in intermittent operation
• Features an integrated multicolor LED for operational status and fault diagnostics
• Equipped with an electrical remote reset facility for convenience in industrial settings
• Includes a bridging contact for oil preheaters and monitoring of preheating time
• Provides undervoltage detection to safely shut down the burner in case of power instability
• Limitation of the number of repetitions to enhance safety during ignition failures
• Compatible with QRB photoresistive or QRC blue-flame detectors for reliable flame supervision

Specifications

• Model: LMO24.011C2
• Supply Voltage: AC 230 V (+10% / -15%)
• Frequency: 50/60 Hz
• Power Consumption: 12 VA
• Safety Time (TSA): 10 seconds
• Pre-purge Time (t1): 5 seconds
• Pre-ignition Time (t3): 5 seconds
• Post-ignition Time (t3n): 10 seconds
• Interval to Release of Fuel Valve 2: 15 seconds
• Burner Capacity: Less than 30 kg/h
• Protection Rating: IP40 (when mounted)
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 0.2 kg

Applications

• Specifically suited for flash-steam generators and rapid steam generators
• Supervision of 1- or 2-stage forced draft oil burners in domestic or industrial heating systems
• Control of yellow-burning flames (using QRB detectors) and blue-burning flames (using QRC detectors)
• Service-compatible replacement for Siemens LOA24.571 burner controls
• Integration by original equipment manufacturers (OEMs) into combustion equipment and boiler systems