Siemens LGB21.330A27 Sequence Controller & Gas Burner Control Box 

Technical Specifications & Features 

• Product Name: Siemens LGB21.330A27 Sequence Controller / Siemens Gas Burner Control Box

• Brand & Manufacturer: Siemens

• Model Range: LGB Series (LGB21.330A27)

• Burner Compatibility: 1-Stage or 2-Stage Forced Draft Gas & Gas/Oil Burners

• Operating Voltage: AC 230V (+10% / -15%), 50/60 Hz

• Power Consumption: Approx. 3 VA

• Pre-Purge Time (t1): 30 Seconds

• Safety Time (TSA): 3 Seconds

• Pre-Ignition Time (t3): 3 Seconds

• Flame Sensor Compatibility: Ionization Probe (Ion Electrode) or QRC1 Blue Flame Sensor / QRA with AGQ1 Adapter

• Fuel Type Compatibility: Natural Gas, LPG, PNG & Gas/Oil Dual-Fuel

• Primary Application: Commercial Boilers, Baking Ovens, Hot Water Generators & Small Industrial Furnaces

• Core Function: Electro-mechanical sequence control, air pressure supervision, and ionization/optical flame monitoring

Applications & Key Benefits 

• 30-Second Pre-Purge Sequence: Features a precise 30-second pre-purge period to thoroughly ventilate the combustion chamber prior to ignition.

• 3-Second Lockout Protection: Rapid 3-second safety time (TSA) instantly isolates fuel supply upon ignition failure or flame loss.

• Dual Flame Supervision Support: Compatible with ionization probes, blue-flame sensors, or optical detectors for versatile flame monitoring.

• Air Pressure Switch Supervision: Actively monitors air pressure switch function during startup and operation to safeguard against air supply failure.

• Undervoltage Protection: Equipped with internal voltage monitoring circuits to execute safe shutdown under low voltage conditions.

• Standard Plug-In Base Compatibility: Mounts directly onto standard Siemens plug-in bases for fast installation and seamless field replacement.

Buy Siemens LGB21.330A27 Sequence Controller 

Looking for ready stock and competitive pricing for the Siemens LGB21.330A27 Sequence Controller or Siemens Gas Burner Control Box? Contact Aditya Enterprises today for instant price quotes and rapid dispatch.

• Company: Aditya Enterprises (Aditya Burner)

• Call / WhatsApp: +91 9731857001

• Location: Bengaluru, Karnataka, India

Shop the Siemens LGB21.330A27 Sequence Controller for gas burners. We are a reliable supplier of genuine Siemens LGB series parts with ready stock and fast Pan-India shipping. Contact us for competitive pricing today.