3312
10
GB
LOCKOUT DUE TO FIRING FAILURE
LOCKOUT TYPES AND TRIGGERING TIMES IN CASE OF BURNER MALFUNCTION
DESCRIPTION OF THE FAULT TYPES
LOCKOUT
Presence of flame during the waiting time "t2"
After max. 30 seconds (after
TL
)
Presence of flame in pre-purging or loss of air pressure on functioning
Within 1 second
Air pressure loss during pre-ventilation
After a maximum of 1 repetition within one second
No ignition at the end of the safety time “ts”
Within three seconds
Flame goes out during operation
After a maximum of 3 repetitions within one second
Air pressure switch broken before or after the burner starts up
Within 120 seconds, within 15 seconds
t
s
TL
M
I
V1
SO
LED
P
M
t
4i
t
2
t
1
t
3
.
V2
t
2
t
s
TL
M
I
P
M
t
1
t
3
.
LED
SO
V1
V2
LOCKOUT DUE TO A FLAME OR FLAME SIMULATION
DETECTED DURING PRE-PURGING
D7398
Red
Red
Lockout
D7399
KEY TO LAY-OUT
I
– Ignition transformer
LED
– Reset button LED indicating operating
status
M
– Fan motor
SO
– Ionisation probe
TL
– Limit thermostat
V1
– Gas valve 1
st
stage
V2
– Gas valve 2
nd
stage
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
t5
t6
max
max
-
-
-
max
max
-
min/max
max
1
30
3
120
40
15
70
3
5/25
360
