Burner 2 Start-Up Attempts - Honeywell Krom Schroder BCU 580 Technical Information

Burner control unit
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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 746-2, 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.
00
02
03
04
t
t
Z
FS1
t
SA1
If no flame is formed during the start-up so that at the
end of the safety time t
BCU 580 · Edition 11.15l
06
06
t
SA2
no flame signal is detected,
SA1
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.
00
02
t
Z
t
SA1
If no flame is formed during the start-up so that at the
end of the safety time t
88
the BCU closes the gas valves and repeats the start-up.
11
L1
Each start-up attempt begins with the parameterized
46
1
ϑ1
start-up behaviour.
9
13
V1
5
If the safety time t
1
4
ϑ2
having been detected, even after the last parameter-
14
V2
8
2
ized start-up attempt, this will result in a BCU safety
41
42
1
shut-down with subsequent fault lock-out. The fault
43
2
t
message 06 will flash in the BCU display depending on
the burner operating mode.
03
04
06
05
06
05
06
t
t
t
t
t
t
FS1
W
W
SA2
SA2
SA2
no flame signal is detected,
SA2
elapses without a flame signal
SA2
88
06
11
L1
46
1
ϑ1
9
13
V1
5
1
4
ϑ2
14
V2
8
2
41
42
1
43
2
t
64

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