3389
9
GB
LOCKOUT DUE TO IGNITION FAILURE
LOCKOUT TYPES AND TRIGGERING TIMES IN CASE OF BURNER MALFUNCTION
DESCRIPTION OF THE FAULT TYPES
LOCKOUT
Presence of flame during standby time “t2”
After max. 30 seconds (after
TL
)
Presence of flame in pre-purging or air pressure drop during operation
Within 1 second
Air pressure drop during pre-purging
After max. 1 repetition within one second
Ignition failure at the end of the safety time “ts”
Within three seconds
Flame goes out during operation
After max. 3 repetitions within one second
Air pressure switch broken before or after burner start-up
Within 120 seconds, within 15 seconds
t
s
TL
M
I
V
SO
LED
P
M
t
4i
t
2
t
1
t
3
.
t
2
t
s
TL
M
I
V
SO
LED
P
M
t
1
t
3
.
LOCKOUT DUE TO A FLAME OR FLAME SIMULATION
DETECTED DURING PRE-PURGING
D7394
Red
Red
Lockout
D7395
KEY TO LAYOUT
I
– Ignition transformer
LED
– Reset button LED indicating operating
status
M
– Fan motor
SO
– Ionisation probe
TL
– Limit thermostat
V
– Gas valve
Red (LED lights)
Green (LED lights)
Green
Lockout
Red (LED lights)
Green (LED lights)
Green
OPERATING TIMES
(in seconds)
t1, t3l, t4l, t4a
t2l
t2, t4i
t2a
t3
t3a
t3r
ts
t6
max
max
-
-
-
max
max
-
max
1
30
3
120
40
15
70
3
360
