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IFD 258 · Edition 03.12l
21
44
ซ
.
บรมราชชนนี
70
ถ
.
บรมราชชนนี
ศาลาธรรมสพน์
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กทม
. 10170.
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01
09
4 .3 .3 Flame simulation
The flame simulation check is conducted after applying
the start-up signal (
) during the waiting time t
W
.
Start-up signal, safety interlock
The start-up signal is the same as the signal in the
safety interlock.
If the start-up/safety interlock signal drops more than
four times in succession during start-up, an inadmissible
quantity of non-combusted gas can reach the combus-
tion chamber during the safety time via open gas valves.
Therefore, a fault lock-out is performed on the automatic
burner control unit IFD 258 following three consecutive
drops of the start-up/safety interlock signal (blinking
).
If flame simulation is signalled during start-up, the flame
simulation delay time t
LV
starts to elapse. If the flame
simulation is discontinued during the flame simulation
delay time t
LV
(max. 25 s), the burner will start up. Oth-
erwise, a fault lock-out occurs. The display blinks and
indicates
.
t
W
1
. . .
88
V1
t
01
01
1
L1
3
10
11
5
13–14
8–9
tW
t
tLV