Home/ Suppliers/ บริษัท บุญเยี่ยมและสหาย จำกัด /Siemens/ Siemens Burner Controllers LMO14 LMO24 LMO44 Series
บริษัท บุญเยี่ยมและสหาย จำกัด
Verified Supplier
Siemens Burner Controllers LMO14 LMO24 LMO44 Series

Siemens Burner Controllers LMO14 LMO24 LMO44 Series

Siemens
Siemens Burner Controllers LMO14 / LMO24 / LMO44 Series are microcontroller-based oil burner controls designed for the startup, supervision, and control of single-stage and two-stage forced draft oil burners in intermittent operation. They support flame detection using QRB1, QRB3, QRB4, and QRC1 detectors and feature undervoltage detection, remote reset, restart limitation, and multicolor LED diagnostics. Suitable for industrial boilers, steam generators, and heating systems, with oil throughput below 30 kg/h and above 30 kg/h on selected models.

Product Description

Siemens Burner Controllers LMO14 / LMO24 / LMO44 Series

Siemens LMO14 / LMO24 / LMO44 Series are microcontroller-based oil burner controls designed for the automatic startup, supervision, and control of forced draft oil burners operating in intermittent mode.

These controllers support single-stage and two-stage oil burner applications. They provide accurate burner sequencing, reliable flame supervision, integrated safety monitoring, and multicolor LED diagnostics.

Key Features

  • Automatic startup and flame supervision for forced draft oil burners
  • Single-stage control with LMO14 and two-stage control with LMO24 / LMO44
  • Oil throughput below 30 kg/h, and above 30 kg/h on selected versions
  • Yellow-flame detection using QRB1, QRB3 or QRB4 flame detectors
  • Blue-flame detection using QRC1 detectors
  • Integrated undervoltage detection
  • Electrical remote reset capability
  • Oil preheater monitoring and bridging contact
  • Accurate digital burner control sequence
  • Controlled intermittent operation after 24 hours of continuous operation
  • Restart limitation for improved operational safety
  • Multicolor LED operating status and fault diagnostics
  • Diagnostic interface support via OCI400 and ACS410 software

LMO14 / LMO24 / LMO44 Series Comparison

Series Control Stages Application
LMO14 1 Stage Single-stage forced draft oil burners with oil throughput below 30 kg/h
LMO24 2 Stages Two-stage oil burners, including selected versions for flash-steam generators and air heaters
LMO44 2 Stages Two-stage oil burners for stationary direct-fired air heaters

Typical Applications

  • Industrial Boiler Systems
  • Forced Draft Oil Burners
  • Steam Generators
  • Industrial Heating Systems
  • Air Heating Systems (selected models)
Selection Note: Before selecting or replacing an oil burner controller, verify the exact model reference, supply voltage, burner control sequence, safety timing, number of stages, and flame detector compatibility. Installation and commissioning must be performed by qualified personnel.

Specifications

Technical Specifications Siemens LMO14 / LMO24 / LMO44 Series

Brand Siemens
Product Type Oil Burner Controls
Series LMO14 / LMO24 / LMO44
Control Technology Microcontroller-based
Burner Type Forced Draft Oil Burner
Operating Mode Intermittent Operation
Control Stages LMO14: Single-stage
LMO24: Two-stage
LMO44: Two-stage
Oil Throughput Below 30 kg/h, above 30 kg/h on selected versions
Supply Voltage AC 230 V (+10% / -15%)
AC 120 V (+10% / -15%) on selected models
Mains Frequency 50–60 Hz ±6%
Power Consumption 12 VA
External Primary Fuse 6.3 A (Slow)
Compatible Flame Detectors QRB1 / QRB3 / QRB4 / QRC1
Degree of Protection IP40 (ensured by installation)
Safety Class Class I
Weight Approx. 200 g
Operating Temperature LMO14 / LMO24: -5 to +60 °C
LMO44: -20 to +60 °C
Relative Humidity Below 95% RH (non-condensing)
Installation Altitude Maximum 2,000 m above sea level
Remote Reset Supported
Status Indication Multicolor LED
Diagnostic Interface OCI400 / ACS410
Applicable Standards DIN EN 298
DIN EN 13611
DIN EN 60730-2-5

Model Reference and Control Timing

Model Voltage Stages Prepurge (t1) Safety Time (TSA)
LMO14.111C2 230 V 1 15 s 10 s
LMO14.113C2 230 V 1 15 s 10 s
LMO24.111C2 230 V 2 15 s 10 s
LMO24.111C1 120 V 2 15 s 10 s
LMO24.011C2 230 V 2 5 s 10 s
LMO24.255C2 230 V 2 25 s 5 s
LMO44.255C2 230 V 2 25 s 5 s

Note: Control timing varies by model. t1 refers to the prepurge time, while TSA refers to the ignition safety time. Always verify the complete model reference and the manufacturer's technical documentation before installation or replacement.