st
1
Attempt
Purge Period
(5 sec)
(3 sec)
+
st
1
Attempt
Purge Period
(5 sec)
(3 sec)
+
4.12 Ionization electrode
Flame is sensed through an ionization electrode, and detection is granted for ionization currents [higher than
0.8 µA]
Page 25 from 76
Fan
st
1
Ignition Sequence
Safety Time = 29 sec
nd
2
Attempt
Purge Period
(5 sec)
+
nd
2
Ignition Sequence Safety Time of 29 sec
nd
2
Attempt
Purge Period
(5 sec)
+
Pict.39 – Ionization electrode
6 720 814 719 SM FP_Australia 2017/04 EN
Ignition spark
rd
3
Attempt
(3 sec)
(5 sec)
+
rd
3
Attempt
(3 sec)
(5 sec)
+
Pos Purge
(8 sec)
Pos Purge
(3 min)