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7.8.3
Shutdown test
If, during operations, the reset push-button is pressed for longer
than 5 seconds and less than 10 seconds, (so as not to go to the
next menu) the burner switches off, the oil valve closes, the flame
is extinguished and the starting sequence restarts.
If the switch off test is enabled, the number of repetitions of the
start up sequence (see section 7.8.7) and the number of possible
resets (see section 7.8.11), are reset.
7.8.4
Diagnosis of the flame signal quantity
The burner allows a light diagnosis of the flame during the burner
run operation.
Flame quality
Acceptable
Good
Excellent
NOTE:
If the detected signal is more than 6 times the minimum threshold
value (approximately 3 lux), the green LED will be constant. Oth-
erwise, the number of blinks will indicate the quantity of signal
coming from the sensor (no. of blinks * approx. 3 lux). The detect-
ed signal depends on the sensitivity of the sensor used, and its
tolerance; if the sensor is highly sensitive, the signal level will be
high (for the same flame).
Flame detection
Type of sensitive element
Functioning principle
Sensitivity to the flame during the
pre-purging
Typical sensitivity to the flame
during normal operation
Typical sensitivity to the flame
failure
NOTE:
With 2 lux, the burner goes into lockout after 3 cycle repeats
7.8.5
Intermittent operation
After 1 hour of continuous operation, the control box starts the au-
tomatic switch-off sequence, followed by a restart, in order to
check for a possible fault with the flame sensor.
It is possible to set this automatic switch off to 24 hours, (see
section 7.10).
7.8.6
Recycle and limit of repetitions
The control box allows a recycle, i.e. complete repetition of the
start-up sequence, making up to 3 attempts, in the event the
flame failure during operation.
If the flame failure 4 times during operations, this will cause a
burner lockout. If there is a new demand for heat during the recy-
cle, the 3 attempts are reset when the limit thermostat (TL)
switches.
NOTE:
After 510 seconds of continuous operation, a new attempt of
possibility is added.
By disconnecting the power supply, when a new heat request oc-
curs (power supply is applied to the burner) all possible attempts
at re-ignition are reset (maximum 3).
Start-up, calibration and operation of the burner
Number of green LED blinks
1 - 2 blinks
3 - 4 blinks
5 blinks, or always ON
Parameters
Photoconductive cell
Detection of visible light
> 1 Lux
> 3 Lux
< 2 Lux
7.8.7
Presence of an extraneous light or parasite
flame
The presence of the parasite flame or the extraneous light can be
detected in the stand-by condition when the burner is stopped
and waiting for a heat request. If the presence of a flame or ex-
traneous light is detected in the "t2" state, the motor does not start
until the flame signal has disappeared or until lockout has been
reached.
If when the fan motor starts, during the pre-purging, an extrane-
ous light or parasite flame is detected the burner remains in purg-
ing until it disappears or the lockout condition is reached 25
seconds.
if the parasite flame or the extraneous light are detected during
the pre-purging, the pre-purging time of 15 seconds is reset and
the time for checking for the presence of a parasite flame or ex-
traneous light begins (the motor continues to purge).
The function is cumulative and can be carried out a maximum of
2 times. If at the 24th second the parasite flame or the extraneous
light disappears, the pre-purging time starts and if the parasite
flame or the extraneous light reappear the pre-purging time is re-
set and the countdown of 25 seconds for checking for the pres-
ence of the parasite flame or the extraneous light restarts.
The third time that the parasite flame or the extraneous light ap-
pears the burner goes into lockout.
If during the recycling due to flame disappearance when operat-
ing and the consequent repetition of the start-up sequence the
presence of a parasitic flame or extraneous light is detected, the
control countdown of 25 seconds starts (for the presence of the
parasitic flame or extraneous light).
The fault is indicated by means of the blinking LED (see section
7.8.2).
7.8.8
Pre and post spark ignition
In the pre-spark ignition time the ignition device starts 2 seconds
before the oil valve opens.
In the post-spark ignition time, the ignition device stops 3 sec-
onds after safety time.
The spark ignition is present during all safety time.
NOTE:
In case of continuous recycling or heat requests close to
one another, the maximum permissible number of cycle rep-
etitions of the ignition transformer is one attempt every min-
ute.
7.8.9
External lockout signal
The burner is equipped with an external locking signal function,
i.e. to signal (together with the integrated reset push-button) a
burner locking alarm. The control box enables the command of
an external lamp by way of the exit "
the output connected to the L2 pin of the 5-pole socket of the
burner's power supply connection.
23
GB
" (230Vac-0.5Amp max);
20035274
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