BCU 480 · Edition 06.07
28
Permanent pilot burner
5 .3 .1
Parameter 16 = 1
t
SA1
t
Z
04
06
07
08
02
03
00
t
t
FS1
t
SA2
t
FS2
9
12
V1
1
14
V2
2
ϑ
1
ϑ
2
2
1
24
21
88
4
5
2
7
18-19
16-17
28-29
Operating mode: Permanent pilot burner
In the “Permanent pilot burner” operating mode, the pilot
burner remains in operation until its start-up signal drops.
If this parameter is activated (P16 = 1), both flames are con-
trolled independently in the case of pilot and main burner
monitoring.
Operating mode: Intermittent pilot burner
Start-up as in the illustration “Permanent pilot burner” with
the difference being that the start-up signal for pilot and main
burners is applied synchronously and that immediately after
the flame proving period t
FS1
, the main burner is started.
Interrupted pilot burner
5 .3 .2
Parameter 16 = 0
t
SA1
t
Z
04
06
07
08
02
03
00
t
t
FS1
t
SA2
t
FS2
88
9
12
V1
1
14
V2
2
2
1
24
21
4
5
2
7
18-19
16-17
28-29
ϑ
1
ϑ
2
Operating mode: Interrupted pilot burner
If parameter 16 = 0, the pilot burner is switched off once the
safety time t
SA2
has elapsed. In this setting, the flame signal
can be connected to terminals 24 or 9.
The pilot burner is switched off after the main burner safety
time t
SA2
has elapsed.
Parameters > Pilot and main burner monitoring
