BCU 580 · Edition 11.15l 87
Parameters
Parameter 48 = 1: opens with gas stage 1.
t
SA1
t
Z
0402 0300 A0
t
t
FS1
t
SA2
t
FS2
00A0 00 A8A6 A7
2
10
∨
53
A
88
ϑ1
46
1
ϑ2
4
11
9
5
37-38
13
V1
1
2
14 V2
14 V3
57 V4
17-18
8
M
The air actuator opens at the same time as safety
time t
SA2
begins and the main burner starts.
Parameter 48 = 2: opens with operating signal.
t
SA1
t
Z
0402 0300 A0
t
t
FS1
t
SA2
t
FS2
00A0 00 A806 07
2
10
∨
53
A
88
ϑ1
46
1
ϑ2
4
11
9
5
37-38
13
V1
1
2
14 V2
14 V3
57 V4
17-18
8
M
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.
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