BCU 460, BCU 465 · Edition 11.19
84
Parameters
11 .6 Behaviour during operation
11 .6 .1 Restart
Parameter A009
Restart can be programmed for burners which occa-
sionally display unstable behaviour during operation.
This parameter determines whether the BCU initiates
an immediate fault lock-out or an automatic restart
after a safety shut-down during operation. Excessive
restarts, however, can be detected.
Taking into account national standards and require-
ments, it must be clarified whether the restart func-
tion may be used .
In accordance with EN 746-2, a restart may be con-
ducted only if the safety of the installation is not im-
paired.
The precondition for an automatic restart is that the
burner can restart (as intended in all operating phases).
In this case, it must be ensured that the program se-
quence started by the BCU matches the application.
Parameter A009 = 0: Off.
04
t
t
SB
04
88
ϑ
V1
V2
V3
L1
1
35
L
51
22
60
61
62
96
82
A safety shut-down with subsequent fault lock-out
takes place in the event of flame failure during opera-
tion.
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