Technical information

IFD 258 · Edition 03.08
34
Glossary12
Waiting time 12.1 t
W
t
W
t
1
3
10
11
5
13–14
8–9
L1
t
Z
t
SA
ϑ
01
02
88
02
Once the start-up signal J has been applied, the waiting time
t
W
starts to elapse. During this time, a self-test is conducted
to detect errors in internal and external circuit components. If
no malfunction is detected, the burner will start up.
Safety time on start-up t12.2
SA
t
W
t
1
3
10
11
5
8-9
13-14
*
L1
t
Z
t
SA
88
04
0201
This refers to the period of time between switching on and
switching off of the gas valve V1, when no flame signal is
detected. The safety time on start-up t
SA
(3, 5 or 10 s) is the
minimum operating time of the burner and automatic burner
control unit.
Ignition time t12.3
Z
If no malfunction is detected during the waiting time t
W
, the
ignition time t
Z
then starts to elapse. Voltage is supplied to
the gas valve V1 and the ignition transformer and the burner
is ignited. The duration of the ignition time is either 2, 3 or
6 seconds (see Technical data).
t
W
t
1
3
10
11
5
8-9
13-14
*
L1
t
Z
t
SA
88
04
0201
Flame simulation/Flame simulation delay 12.4
time t
LV
t
1
3
10
11
5
L1
t
W
t
LV
8–9
13–14
ϑ
0101
Flame simulation is an incorrect flame signal. If flame simu-
lation is detected during start-up, 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. Otherwise, a fault
lock-out occurs.