Siemens
Siemens Burner Control LME22.331C2
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Specifications
| Brand | Siemens |
|---|---|
| Model Number | LME22.331C2 |
| Official Product Name | Burner Control LME22.331C2 |
| Applicable System | Gas burners, forced draft burners |
| Product Type | Burner Control |
| Equivalent Standard | EN 298, UL 372 |
| Product Status | In Stock |
| Power Consumption | 8 VA (including burner control) |
| Safety Time | 2 seconds |
| Pre-purge Time | 30 seconds |
| Post-ignition Time | 2 seconds |
| Flame Detector | QRA55 or QRA57 (UV sensor) |
| Degree of Protection | IP40 (when mounted in appropriate enclosure) |
| Ambient Temperature | -20...+60 °C |
| Dimensions (W x H x D) | 106 x 88 x 56 mm |
| Weight | Approx. 0.2 kg |
| Mounting | Panel mounting with screw terminals |
| Standards | EN 298, UL 372 |
| Operating Voltage | AC 230 V ±10%, 50/60 Hz |
Product Description
It is part of the LME22 series, designed for use with Siemens QRA55 or QRA57 flame detectors (UV sensors). The control provides automatic burner sequencing, flame monitoring, and safety shutdown in case of fault. It features a 2-second safety time, a pre-purge time of 30 seconds, and a post-ignition time of 2 seconds. The LME22.331C2 operates with a nominal voltage of AC 230 V and has a power consumption of 8 VA (including burner control). It is housed in a compact, flame-retardant plastic casing with a width of 106 mm, height of 88 mm, and depth of 56 mm, and is designed for panel mounting with screw terminals. The device is certified to EN 298 and UL 372 standards, ensuring high safety and reliability in industrial burner applications. The LME22.331C2 is a direct replacement for earlier LME22 models and is compatible with Siemens QRA55 and QRA57 flame detectors, as well as various actuators and valves. Its robust design and precise timing make it suitable for a wide range of commercial and industrial burners, including those in heating plants, process heat generation, and thermal oil systems. The Siemens LME22.331C2 is a microprocessor-based burner control for intermittent operation of forced draft gas burners.
Basic Product Information
- Flame monitoring with UV sensor (QRA55/QRA57)
- Safety time 2 seconds, pre-purge time 30 seconds
- AC 230 V operating voltage, 50/60 Hz
- Compact design for panel mounting, screw terminals
- Certified to EN 298 and UL 372
- Microprocessor-based burner control for intermittent operation
Technical Specifications
Version & Model Difference
The LME22.331C2 is part of the LME22 series, which includes variants like LME22.331A2 and LME22.331B2. The 'C2' suffix indicates a specific configuration with a 30-second pre-purge time and 2-second safety time. Compared to earlier versions, the C2 model has updated firmware for improved flame signal processing and compatibility with newer UV sensors. It is also a direct replacement for older LME22.331A2 models, offering the same mounting and wiring but with enhanced performance.
Application Scenarios
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