LMO64.301C2 Siemens Burner Control

Overview

The Siemens LMO64.301C2 is a microprocessor-based burner control unit designed for the startup, supervision, and control of 1-stage forced draft oil burners in intermittent operation. Engineered for burners with an oil throughput of up to 30 kg/h, this advanced controller ensures high-precision program sequences through digital signal handling. It is a critical safety component for industrial and commercial heating applications, providing reliable flame monitoring and comprehensive fault diagnosis to optimize burner performance and energy efficiency.

Features

• Microprocessor-controlled digital signal processing for accurate and reproducible program times
• Support for yellow-burning flame supervision via QRB1, QRB3, or QRB4 photoresistive detectors
• Support for blue-burning flame supervision via QRC blue-flame detectors
• Integrated undervoltage detection and electrical remote reset functionality
• Bridging contact and time monitoring for oil preheaters
• Multicolor LED indicator for real-time status and fault messages
• Controlled intermittent operation with a mandatory shutdown after 24 hours of continuous use
• Limitation of the number of repetitions to enhance system safety
• Durable, heat-resistant, and flame-retarding plastic plug-in housing
• Designed for 250,000 startup cycles, approximately a 10-year service life

Specifications

• Model: LMO64.301C2
• Mains Voltage: AC 230 V (+10% / -15%)
• Frequency: 50/60 Hz (+/- 6%)
• Power Consumption: 12 VA
• Safety Time (TSA): 10 seconds
• Prepurge Time (t1): 15 seconds
• Postpurge Time (t8): 90 seconds
• External Primary Fuse: 6.3 A (slow)
• Protection Rating: IP40 (when mounted)
• Operating Temperature: -5 C to +60 C
• Weight: Approximately 0.2 kg (0.44 lbs)

Applications

• Startup and supervision of 1-stage forced draft oil burners in monoblock design
• Use in industrial and commercial oil heating systems and boilers
• Integration into gas-fired equipment conforming to EN 267 and EN 230 standards
• Compatible with Siemens burner controls and accessories such as the AGK11 plug-in base and OCI400 interface for PC-based diagnostics