Honeywell BCU 370 - Switch-On Delay Time T; Pre-Ignition Time T; St Safety Time on Start-Up, Burner;Pilot Burner VZ

BCU 370 · Edition 01.19 45
Parameters
4.3.3 Switch-on delay time t
E
Parameter 22
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 time between applying the start-up sig-
nal (ϑ) and initiating the burner start.
When several burners are activated simultaneously,
setting different switch-on delay times t
E
prevents the
fans from starting at the same time and reduces the
load on the power supply.
4.3.4 Pre-ignition time t
VZ
Parameter 21
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 ignition unit is activated.
The ignition spark can stabilize in the air flow during the
pre-ignition time t
VZ
.
The valves are still closed during the pre-ignition time
t
VZ
. Following pre-ignition t
VZ
, the safety time t
SA1
starts to elapse. The valves are opened while the igni-
tion unit continues to operate.