Product Description

SIEMENS LFL1.335 Gas Burner Control

The SIEMENS LFL1.335 is a burner control unit designed for the supervision of forced draught gas burners of medium to high capacity. It is intended for intermittent operation, meaning at least one controlled shutdown must occur every 24 hours. This control unit manages the burner start-up sequence, monitors the flame during operation using an ionization probe or UV flame detector, and ensures safe shutdown. It is suitable for use in various applications including stationary air heaters and industrial heating systems requiring reliable gas burner management.

Technical Specifications:

Mains Voltage: AC 220 V –15 %…AC 240 V +10 %
Mains Frequency: 50…60 Hz ±6 %
Primary Fuse (External): Max. 10 A (slow)
Power Consumption: Approx. 3 VA
Weight: Approx. 1000 g
Degree of Protection: IP40 (unless installed in a cabinet)
Mounting Position: Optional
Permissible Ambient Temperature (Operation): -20…+60 °C
Permissible Ambient Temperature (Storage/Transport): -20…+80 °C
Flame Supervision: Via ionization probe or UV flame detector QRA…
Application: Forced draught gas burners of expanding flame or interrupted pilot construction, medium to high capacity.
Operation Mode: Intermittent operation (at least one controlled shutdown every 24 hours)