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Building Technologies Division
CC1N7785en
20.11.2017
Control sequence in the event of fault and indication of lockout
(cont´d)
P
a
b´
b
a
b´
b
2
1
a
2
b
a
b
1
P
P
1
P
1
2
a
b´
b
P
1
2
LOK16.140...
LOK16.250...
LOK16.650...
LGK16.122...
LGK16.133...
LGK16.322...
LGK16.333...
LGK16.622...
LGK16.335...
LGK16.635...
7785p02/0296
a-b Startup
sequence
b-b´
With certain time variants:
Idle steps
of the sequence switch up to the self-shutdown after burner startup
(b´ = operating position of the sequence switch)
b(b´)-a Postpurge sequence after controlled shutdown.
In start position (a), the sequence switch switches itself automatically off or
immediately initiates another burner startup (e.g. after a fault has been
corrected)
Duration of safety time with expanding flame burners
Duration of safety times with interrupted pilot burners
When lockout has occurred, the burner control can immediately be reset:
Do not press the lockout reset button for more than 10 seconds
The sequence switch always travels to the start position first
After resetting
After rectification of a fault that led to shutdown
After each power failure
During this period of time, power is only fed to terminals 7 and 9...11
After that, the burner control programmed the restarting of the burner
Note!
Do not press the lockout reset button for more than 10 seconds.
Lockout indication
