Siemens LEC1/8853 Manual page 13

Double or multi-flame
supervision of burners
for selectable operation
with oil or gas
(expanding flame burner)
CC1N7761E
Start-up with short pre-ignition (3 s) and supervised air damper control. Control of the 2nd
output stage via on/off controller (R2). Necessary flame safeguards: type LFE10... with
UV-detectors QRA...
OV2
Öl
OV1
OV3
Luft M LK
GV1
Gas
GV2
GV3
Operating switch BS1
I Full load
II Stop
III Partial load
IV Automatic control
Operating mode selector switch BS2
I Gas
II Off
III Oil
7761a09/0696
13