BCU 480 · Edition 06.07
32
Flame proving period t
5 .5 .2
FS
Pilot burner
Parameter 23
t
SA1
t
Z
88
04
02
03
00
t
t
FS
4
5
1
7
9
18-19
12
V1
14
V2
16-17
1
1
ϑ
1
Main burner
Parameter 25
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
Programmable time between 0 and 25 s.
This time elapses before the BCU starts the next program step
so as to give the flame time to stabilise.
Minimum combustion time t
5 .5 .3
B
Parameter 20
Programmable time in the range from minimum safety time on
start-up t
SA2
to maximum 25 s during which the main burner
remains in operation. In the case of brief activation of the
start-up signal input (
ϑ
2) (e.g. with a pulse), the combustion
time t
B
is started, and the main burner remains in operation
for at least this period.
04
06
07
t
t
SA2
t
B
9
12
V1
1
14
V2
2
2
1
24
21
88
4
5
2
18-19
16-17
28-29
ϑ
1
ϑ
2
Parameters > Behaviour during start-up
