Two-Stage Oil Burner Control
The LMO44.255C2 is a microcontroller-based control designed for startup, supervision and control of applicable two-stage forced-draft oil burners in intermittent operation.
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SIEMENS
SIEMENS LMO44.255C2 Oil Burner Control 2-Stage 230VAC 5s Safety Time
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PRODUCT DOCUMENTATION
Product Information
Technical specifications, features, applications and purchasing information.
Technical Specifications
| Brand | SIEMENS |
| Model Number | LMO44.255C2 |
| Product Category | Oil Burner Control |
| Series | LMO44 |
| Burner Type | Forced-Draft Oil Burner |
| Operation | Intermittent |
| Fuel Valve Stages | 2 |
| Application | Stationary Direct-Fired Air Heaters |
| Mains Voltage | AC 230 V +10% / -15% |
| Mains Frequency | 50-60 Hz ±6% |
| Power Consumption | 12 VA |
| External Primary Fuse | 6.3 A Slow |
| Flame Detectors | QRB / QRC |
| Waiting Time | 2.5 s |
| Prepurge Time | 25 s |
| Ignition Safety Time | 5 s Max. |
| Preignition Time | 25 s |
| Postignition Time | 5 s Max. |
| Fuel Valve 2 Release Interval | 5 s Min. |
| Degree of Protection | IP40, Ensured Through Mounting |
Key Features
230 VAC Supply
The burner control operates from an AC 230 V supply with a documented tolerance of +10% / -15% and a mains frequency of 50-60 Hz ±6%.
5-Second Safety Time
The LMO44.255C2 has a documented maximum ignition safety time of 5 seconds within its burner startup sequence.
QRB / QRC Flame Supervision
Yellow-burning flames can be supervised using QRB photoresistive detectors, while QRC blue-flame detectors are used for applicable blue-burning flame applications.
Digital Control Sequence
Microcontroller-based signal processing manages the defined startup, flame supervision, operating and shutdown sequence of the burner control.
Operational Diagnostics
The LMO series incorporates status and fault indication functions to support burner operation monitoring and fault diagnostics.
Applications
- Stationary direct-fired air heaters
- Two-stage forced-draft oil burners
- Oil burner startup control
- Burner flame supervision systems
- Atomization oil burner systems
- Intermittent burner operation
- Industrial combustion equipment
- Burner control panels
Purchase Information
We support online purchase of the SIEMENS LMO44.255C2 Oil Burner Control. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
Frequently Asked Questions
What is SIEMENS LMO44.255C2?
It is a microcontroller-based oil burner control for startup, supervision and control of applicable forced-draft oil burners in intermittent operation.
What supply voltage does LMO44.255C2 use?
The documented mains voltage is AC 230 V with a tolerance of +10% / -15%.
What mains frequency is supported?
The documented mains frequency is 50-60 Hz ±6%.
How many fuel valve stages does LMO44.255C2 support?
The documented configuration provides two fuel valve stages.
What is the ignition safety time?
The maximum documented ignition safety time is 5 seconds.
What is the prepurge time?
The documented minimum prepurge time is 25 seconds.
Which flame detectors can be used?
The LMO44.255C2 supports applicable QRB photoresistive flame detectors and QRC blue-flame detectors.
What is the power consumption?
The documented power consumption is 12 VA.
What is the protection rating?
The burner control is specified as IP40, with the degree of protection to be ensured through mounting.
What is the operating temperature range?
The documented operating temperature range is -20 to +60 °C.
Can LMO44.255C2 be considered for an existing burner system?
It can be considered after the exact model, burner type, fuel valve stages, 230 VAC supply, flame detector, control sequence, wiring and burner system requirements have been checked.
What should be checked before ordering?
Check the complete LMO44.255C2 model number together with the two-stage burner requirement, AC 230 V supply, QRB or QRC flame detector, timing sequence, mounting arrangement and electrical connections before ordering.
Need help confirming a model?
Send us your part number and technical requirements.
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