BCU 580 · Edition 11.15l 64
Parameters
10.3.2 Burner 2 start-up attempts
Parameter 08
Up to three start-up attempts are possible in certain
conditions. In accordance with EN 7462, a restart
may be conducted only if the safety of the installa-
tion is not impaired. Note the requirements of the
standards!
For FM and CSA approved units, it is only possible to
select one start-up attempt (P08 = 1).
This parameter defines the maximum number of pos-
sible start-up attempts of burner 2.
If no flame is detected during start-up, an immediate
fault lock-out (P08 = 1) or up to two additional start-up
attempts (P08 = 2, 3) are performed depending on pa-
rameter 08.
Parameter 08 = 1: 1 start-up attempt.
t
SA1
t
Z
04 06 02 03 00
t
t
FS1
t
SA2
06
5
13
V1
1
14
V2
2
ϑ1
ϑ2
8
4
88
1
46
11
9
41
42
L1
1
43
2
If no flame is formed during the start-up so that at the
end of the safety time t
SA1
no flame signal is detected,
this will result in a BCU safety shut-down with subse-
quent fault lock-out. The fault message 06 will flash in
the BCU display depending on the burner operating
mode.
Parameter 08 = 2, 3: two or three start-up attempts.
t
SA2
t
SA2
t
SA2
t
SA1
t
Z
04 0602 0300
t
t
FS1
06
t
W
06
06
05
05
t
W
5
13
V1
1
14
V2
2
ϑ1
ϑ2
8
4
88
1
46
11
9
41
42
L1
1
43
2
If no flame is formed during the start-up so that at the
end of the safety time t
SA2
no flame signal is detected,
the BCU closes the gas valves and repeats the start-up.
Each start-up attempt begins with the parameterized
start-up behaviour.
If the safety time t
SA2
elapses without a flame signal
having been detected, even after the last parameter-
ized start-up attempt, this will result in a BCU safety
shut-down with subsequent fault lock-out. The fault
message 06 will flash in the BCU display depending on
the burner operating mode.
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