BCU 480 · Edition 03.16l
37
Parameters
4 .3 .1 Permanent pilot burner
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
ϑ2
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 pi-
lot burner remains in operation until its start-up signal
drops.
If this parameter is activated (P16 = 1), both flames are
controlled 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 pi-
lot and main burners is applied synchronously and that
immediately after the flame proving period t
FS1
, the
main burner is started.
4 .3 .2 Interrupted pilot burner
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.