Honeywell krom schroeder IFD 258 Manual page 14

Connect voltage
In the event of fault signal: reset
00
Safety interlocks (Li)
Start-up position/standby
01
Waiting time t
start-up with  signal
Flame simulation check
0
Safety time on start-up t
gas valve opens, ignition in process
No flame detected:
04
Flame detected:
operation signalling contact closes
safety time during operation t
starts to elapse, restart or fault lock-out
04
Normal shut-
down via  signal
00
Operation signalling contact opens,
gas valve closes
IFD 258 · Edition 03.12l
running,
W
running,
SA
fault lock-out
Flame fails:
SB
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Behaviour in the event of flame failure during
operation
If the flame fails during operation, the IFD 258 will
perform a fault lock-out within the safety time during
operation t . Depending on the setting of the program
SB
selector switch, the valves will be closed immediately or
the burner will be restarted once. If the burner does not
function, a fault lock-out occurs.
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