Honeywell BCU 370 - Sa1; Fs1

BCU 370 · Edition 01.19 46
Parameters
4.3.5 1
st
safety time on start-up, burner/pilot burner t
SA1
Parameter 12
88
ϑ
t
21
24
1
16
3
30
29
31
13
19-20
4
V1
6 V3
5 V2
17-18
11 DG
max.
9
32
DG
min.
7 DL
90° ➔ 0
0 ➔ 90°
t
SA1
06 H0 05 00
t
FS1
t
E
01
t
GV
P1 A2
t
PV
t
Z1
03 04
t
VZ
H8 07
t
FS2
A1 08
t
RF
t
SA2
The safety time on start-up t
SA1
determines when the
pilot burner or burner valves will be closed in the event
of flame signal failure.
V1 and V2 are opened and the ignition unit is activated
as the safety time t
SA1
starts to elapse. If no flame
signal is pending after elapse of the safety time t
SA1
,
the BCU performs a safety shut-down. The valves are
closed. The BCU carries out up to 3 further start-up at-
tempts, depending on how parameter 07 “Burner start-
up attempts” has been set.
The setting of safety time t
SA1
is to be determined on
the basis of the burner capacity, the type of control and
the relevant application standard, e.g. EN 7462, EN
676, NFPA 85 or NFPA 86.
4.3.6
1
st
flame proving period, burner/pilot burner t
FS1
Parameter 13
88
ϑ
t
21
24
1
16
3
30
29
31
13
19-20
4
V1
6 V3
5 V2
17-18
11 DG
max.
9
32
DG
min.
7 DL
90° ➔ 0
0 ➔ 90°
t
SA1
06 H0 05 00
t
FS1
t
E
01
t
GV
P1 A2
t
PV
t
Z1
03 04
t
VZ
H8 07
t
FS2
A1 08
t
RF
t
SA2
Determines the flame proving period of the burner or
pilot burner.
This time elapses before the BCU starts the next pro-
gram step so as to give the flame time to stabilize.
The flame proving period t
FS1
starts to elapse once
safety time t
SA1
has expired.