LGB 21

REPLACEMENT BY LME21 SERIES

Flame controllers Siemens LGB21 … for monitoring of 1 or 2-stage gas burners or gas and oil small to medium capacity (typically up to 350 kW) with or without fan and with intermittent operation. Depending on the type of burner control used, the flame is supervised either by an ionization probe, a blue-flame detector QRC1… for forced draft gas / oil burners, or a UV detector QRA… (with auxiliary unit AGQ1…A27). In connection with the respective adapters, the LGB… burner controls replace their predecessor types LFI7… and LFM1… (see pdf.)

** LGB21 can be replaced by LME21 (electronic model, more reliable and cheaper)

Specifiations:

– Complete reference: LGB21.130A27, LGB21.230A27, LGB21.330A27, LGB21.350A27, LGB21.550A27

– Automatic forced draft burners for gaseous fuels to EN 676

– Gas burner controls to EN 298 and burner controls for oil burners to EN 230: 1991-05

– Undervoltage detection

– Air pressure supervision with function check of the air pressure switch during startup and operation

– Electrical remote reset facility

– The housing is made of impact-proof, heat-resistant and flame-retarding plastic. It is of plug-in design and engages audibly in the base.