Honeywell Krom Schroder BCU 580 Technical Information page 87

Parameters
Parameter 48 = 1: opens with gas stage 1.
00 A0 00 A0 00 02
t
Z
t
SA1
The air actuator opens at the same time as safety
time t begins and the main burner starts.
SA2
BCU 580 · Edition 11.15l
03 04 A6 A7 A8
11
46
1
4
9
5
8
13
14
14
57
2
10
17-18
37-38
t
t t
SA2
FS1 FS2
Parameter 48 = 2: opens with operating signal.
88
00 A0 00
ϑ1
ϑ2
1
2
V1
V2
V3
V4
A
M
∨ 53
t
This setting is required in the case of two-stage main
burners which are switched ON/OFF via the ϑ2 input.
The air valve opens simultaneously with the operating
signal for the main burner. The air valve can be acti-
vated externally via the input at terminal 2 for cooling
the burner in the start-up position/standby. This func-
tion is not available during burner start-up and during
operation.
▼
A0 00 02 03 04 06
t t
t
Z SA2
FS1
t
SA1
07 A8 88
11
46
1
ϑ1
4
ϑ2
9
5
1
8
2
13
V1
14
V2
14
V3
57
V4
2
A
∨ 53 M
10
17-18
37-38
t
t
FS2
87