Flame Proving Period T; Minimum Burner On Time T - Honeywell Krom Schroeder BCU 480 Manual

Parameters

4 .5 .2 Flame proving period t

Pilot burner
Parameter 23
00 02
t
Z
t
SA1
Main burner
Parameter 25
00 02 03 04
t t
Z FS1
t
SA1
Programmable time between 0 and 25 s.
This time elapses before the BCU starts the next pro-
gram step so as to give the flame time to stabilize.
BCU 480 · Edition 03.16l
FS
03 04 88
1
5
4 ϑ1
7
9
1
12
V1
16-17
1
18-19
t
t
FS1
06 07 08 88
2
5
4
7
12
9
16-17
21
14
24
28-29
18-19
t t
SA2 FS2

4 .5 .3 Minimum burner on time t

Parameter 20
Programmable time in the range from minimum safety
time on start-up t
the main burner remains in operation. In the case of
brief activation of the start-up signal input (ϑ2) (e.g.
with a pulse), the burner on time t
main burner remains in operation for at least this period.
04
ϑ1
V1
1
1
ϑ2
V2
2
2
t
B
to maximum 25 s during which
SA2
is started, and the
B
06 07 08
t
SA2
t
B
88
2
5
ϑ1
4
12 V1
9 1
16-17
1
ϑ2
21
14 V2
24 2
28-29
2
18-19
t
41