IFD 258 · Edition 03.12l
40
44
ซ
.
บรมราชชนนี
70
ถ
.
บรมราชชนนี
ศาลาธรรมสพน์
ทวีวัฒนา
กทม
. 10170.
โทร
: 02-888-3472
Line ID: @add11 e-mail: [email protected]
12 .4 Flame simulation/Flame simulation
delay time t
LV
Flame simulation is an incorrect flame signal. If flame
simulation is detected, the flame simulation delay time
t
LV
(max. 25 s) starts to elapse. If the flame simulation is
discontinued during the flame simulation delay time t
LV
,
start-up can be initiated or operation continued. Other-
wise, a fault lock-out occurs.
12 .5 Safety time during operation t
SB
The default safety time during operation t
SB
in accord-
ance with EN 298 is 1 second. In accordance with EN
746-2, the safety time of the installation during opera-
tion (including closing time of the valves) may not ex-
ceed 3 seconds, see page 27 (Project planning infor-
mation). Note the requirements of the Standards!
12 .6 Flame signal
If a flame is detected, the flame detector will supply a
flame signal.
12 .7 Flame detector
The flame detector detects and signals the presence of
a flame. The flame detector usually consists of a flame
sensor, an amplifier and a relay to produce the signal.
These components, with the exception of the flame
sensor itself, are accommodated within a single hous-
ing (IFW 50).
12 .8 Fault lock-out
In the event of a fault lock-out, all valves are closed and
a fault signalled. Resetting must take place manually
following a fault lock-out.
If the flame fails during operation, the valves are closed
within the safety time t
SB
.
01
01
1
L1
3
10
11
5
13–14
8–9
tW
t
tLV
04
04
88
1
L1
3
10
11
5
13–14
8–9
tSB
t