CC1N7418en08.04.2004Siemens Building TechnologiesHVAC Products7 418Gas Burner Controls LGA...The LGA... are used for the startup and supervision of atmospheric gas burnersof small to medium capacity (without fan) in intermittent operation.The LGA... and this Data Sheet are intended for use by OEMs which integrate thegas burner controls in their products.UseThe flame is supervised with an ionization probe.Using the appropriate adapters, the LGA... can replace their predecessor types LFI7...and LFI5... in terms of function and size (refer to «Ordering»).LGA41.173A27 and LGA52.171B27 are suited for use with direct-fired air heaters.