Product Overview

The Siemens LOA24.171B27 is a compact oil burner control unit engineered to manage the complete combustion sequence — including pre‑purge, ignition, flame monitoring, and shutdown — for 1‑stage or 2‑stage forced‑draft oil burners used in intermittent operation. It is widely used in industrial and commercial heating systems where reliable burner sequencing and safety supervision are essential. The controller is designed for integration into OEM burner assemblies and as a reliable replacement or retrofit control.

Key Features

• Automatic Burner Sequence Control: Handles startup, ignition, flame detection, and controlled shutdown automatically for safer and more reliable burner operation.

• Flame Supervision Compatibility: Suitable for flame detectors like photoresistive (QRB) for yellow flames and blue‑flame (QRC) detectors to verify combustion presence.

• Intermittent Operation Support: Designed specifically for burners that cycle on and off multiple times per day, typical in boiler and heating applications.

• Undervoltage Detection & Safety Lockout: Prevents unsafe ignition if supply conditions are outside acceptable limits and locks out the system on detected faults.

• Standard IEC/EN Compliance: Built to align with relevant EN standards for forced draft oil burners (e.g., EN 267).

• Compact, Rugged Design: Low‑weight unit (~180 g) with IP40 protection when installed and optional mounting position.

Applications

• Forced‑Draft Oil Burners: Provides control and supervision for 1‑ or 2‑stage oil burners with oil throughputs up to approx. 30 kg/h.

• Industrial Heating Systems: Suitable for integration into industrial boilers, furnaces and heat generators that use intermittent oil combustion.

• OEM Burner Integration: Ideal for original equipment manufacturers embedding automatic control logic into heating appliances or combustion equipment.

• Replacement/Retrofit Markets: Functions as a replacement control for older models such as LOA14, LOA21, and LOA22 in compatible burner systems.

Why Choose This Product

• Trusted Quality: Manufactured by Siemens, a recognized leader in combustion and heating control technology, ensuring long‑term reliability.

• Safe & Dependable Operation: Integrated flame supervision, undervoltage detection, and safety lockout enhance operational protection for both equipment and personnel.

• Flexible & Compatible: Works with different flame detector types and supports both single‑ and two‑stage burners, making it adaptable across a wide range of industrial applications.

• Easy Integration: Standardized control interface and typical burner timing parameters simplify installation and retrofit into existing systems.