3312
9
GB
OPERATING PROGRAMME
NORMAL OPERATION
t
3
t
4i
t
s
t
4L
TL
M
I
V1
SO
LED
LED
P
M
.
t
1
SO
t
2
V2
t5
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
t1
Standby time pending an input signal to control box:
reaction time, the control box stands still for the time
t1
.
t3r
A recycle attempt is made in the event of a pressure
drop during pre-ventilation: in the case of a second air
pressure drop between the 16th and 29th second
another lockout follows; if there is a pressure drop
between the 30th second and 40th second , the appli-
ance immediately goes into lockout.
t1I
Flame or flame simulation detected before demand for
heat: the appliance stands still.
ts
Safety time:
if at the end of the
ts
time there is no flame, a block fol-
lows.
t2
Wait time after a request for heat:
the control box stays still for the
t2
time.
t4a
Air pressure drop checking time during the
ts
time and
the normal operation:
the control box locks out immediately.
t2a
Check whether the air pressure switch has already been
moved to the work position before the required heat:
the control box remains in standby status, a lockout fol-
lows if the air pressure switch remains switched for the
T2a
time.
t4i
Transformer turn on time:
total ignition time.
t2I
Flame or flame simulation detected before during
standby time:
lockout occurs if flame or flame simulation persists for
time
t2l
.
t4I
Flame loss in operation:
valve drop maximum reaction time, lockout occurs after
3 recycle attempts.
t3
Pre-purging time:
start of the fan motor.
t5
Delay time between the 1
st
and 2
nd
stage:
2
nd
stage valve opening time after the 1
st
stage valve
opening.
t3a
Time for checking the switching of the air pressure
switch in the operating position during the pre-purging
time: if the pressure switch does not switch within
t3a
a lockout follows.
t6
Post-purging time:
additional purging time on the opening of the heat limit
thermostat (
TL
).
t3I
Flame or flame simulation detected during pre-purging:
immediate lockout.
D7397
MV = still
Flame loss during operation (Recycle max 3 attempts)
Red (LED lights)
Green (LED lights)
No signal needs to be received
Green
Red
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
Green
Lockout
