The Siemens QRB1A-A050B40A is a photoresistive flame detector designed for monitoring yellow-burning oil flames in industrial burner applications. It operates within the visible light spectrum, making it suitable for use with Siemens burner controls such as the LAL, LOA, LMO, and LMV series. This detector is primarily used in intermittent operation settings and is designed for frontal or lateral (90°) flame illumination.
Technical Specifications
- Model: QRB1A-A050B40A
- Sensitivity: Normal (casing color: black)
- Casing Length: 50 mm
- Visible Cable Length: 50 cm
- Stripped Length: 40 mm
- End of Cable: Without ferrule
- Mounting Accessories Included: Small flange and clamp
- Spectral Sensitivity: Approximately 600 nm (optimized for yellow-burning oil flames)
- Operating Temperature Range: -20°C to +60°C
- Storage Temperature Range: -20°C to +60°C
- Permissible Humidity: No condensation or formation of ice
- Degree of Protection: IP40
- Cable Specifications:
- Type: 2-wire thermoplastic cable
- Permissible Cable Length: Up to 20 meters
- Cable Resistance: ≤ 1 Ω per core
Key Features
- Photoresistive Detection: Utilizes a photoresistive element to detect visible light emitted by yellow-burning oil flames, ensuring accurate flame supervision.
- Compact Design: Features a compact form factor with an infused 2-wire thermoplastic cable, facilitating easy installation and integration into burner systems.
- Versatile Mounting: Supplied with a small flange and clamp, allowing for secure and vibration-free mounting. The guide groove in the securing flange and cam on the detector clamp ensure correct alignment towards the flame.
- Environmental Resilience: Designed to operate effectively within a wide temperature range and humidity conditions, suitable for various industrial environments.
Compatible Components & Accessories
- Siemens Burner Controls: Compatible with Siemens burner controls such as the LAL, LOA, LMO, and LMV series.
- Mounting Accessories: Includes small flange and clamp for secure installation.
- Extension Cables: For installations requiring longer cable runs, ensure that the total cable length does not exceed 20 meters and that the cable resistance remains within permissible limits.
Industry Applications
- Oil Burner Systems: Suitable for monitoring yellow-burning oil flames in industrial and commercial oil burner systems.
- Boiler Control: Used in boiler systems to ensure proper flame detection and safety.
- Heating Plants: Applicable in heating plants where reliable flame supervision is critical for safe operation.
Installation & Maintenance Notes
- Mounting: Ensure that the detector is mounted securely using the provided flange and clamp. The guide groove and cam mechanism facilitate correct alignment with the flame.
- Wiring: Always run the detector cable separately from other cables, especially high-voltage ignition cables, to prevent interference. Avoid running the detector cable together with other cables to minimize line capacitance and signal loss.
- Commissioning: After installation, verify the intensity of the light radiation by measuring the detector current. Refer to the burner control’s data sheet for the required minimum detector current values.
- Maintenance: Regularly inspect the detector for cleanliness and proper operation. When cleaning, use a clean and dry cloth; avoid using burner cleansing sprays
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