SIEMENS LGB21.330A27 burner control unit

1 or 2-stage gas burners

Gas/oil combination burners

Systems with or without a fan

Boilers, heating systems, industrial furnaces

OEM integrated systems

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The Siemens LGB21.330A27 is a burner control unit used for the startup and supervision of 1 or 2-stage gas or gas/oil burners. It is suitable for small and medium capacity burners up to 350 kW, with or without a fan, and is designed for intermittent operation.

Model: LGB21.330A27

Voltage: 230 V AC, 50 Hz

Capacity: Max. 350 kW

Operation Mode: Intermittent

Stages: For 1 or 2-stage burners

Flame Supervision: Ionization probe, blue flame detector (QRC1), or UV detector (QRA + AGQ1.xA27)

Protection Features: Low voltage detection, reverse polarity protection, air pressure monitoring

Certifications: EN 298:1994-02, EN 676, ISO 9001, ISO 14001, OHSAS 18001

Reset: Electrical remote reset available

Usage Note: For new designs, recommended models: LME1, LME2, LME3, LME4

Data Sheet