Riello 40 FS8 - Burner Operation Sequence

21
20063692
GB
Start-up, calibration and operation of the burner
6.5 Operation sequence of the burner
6.5.1 Regular operation
Operating times (in seconds)
Tab. E
Tab. F
t3
t4i
ts
t4L
TL
M
I
V
SO
LED
LED
P
M
.
t1
SO
t
2
Key (Fig. 19)
I Ignition transformer
LED Reset button LED indicating operating status
MFan motor
SO Ionisation probe
TL Limit thermostat
V Gas valve
D7393
MV = idle
Flame loss during operation (Recycle max. 3 attempts)
Red (LED signalling)
Green (LED signalling)
No signal needs to be received
Green
Red
Green
Fig. 19
Lockout
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
t1 Standby time pending an input signal to control box: re-
action time, the control box remains idle for the time t1.
t1I Flame or flame simulation detected before demand for
heat: the control box remains idle.
t2 Standby time after a heat request: the control box re-
mains idle for the t2 time.
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 follows
if the air pressure switch remains switched for the T2a
time.
t2I Flame or flame simulation detected before during stand-
by time: lockout occurs if flame or flame simulation per-
sists for time t2l.
t3 Pre-purge time: start of the fan motor.
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.
t3I Flame or flame simulation detected during pre-purging:
immediate lockout.
t3r A recycle attempt is made if there is a pressure drop dur-
ing the pre-purging stage:
there is then a lockout in the event of a second loss of
air pressure between the 16th second and the 29th; is a
loss of pressure between the 30th second and the 40th,
the device goes immediately into lockout mode.
ts Safety time: if at the end of the ts time there is no flame,
a lockout follows.
t4a Air pressure drop checking time during the ts time and
the normal operation:
the control box locks out immediately.
t4i Transformer ignition time: total ignition time.
t4l Loss of flame during operation: maximum reaction time
for dropped valve - after 3 recycle attempts there is a
lockout.
t6 Post-purge time: additional purging time on the opening
of the heat limit thermostat (TL).