108
GB
The flame amplified circuit is sensitive to the variations of the continuous component (DC) of the flame signal
current.
TEST CIRCUIT
Maximum length of flame detection cable: 1mAny short circuit between the detection electrode and earth does not
allow the flame signal to be read. The appliance will perform a lock shutdown at the end of the safety time.
Repetition of the cycle in case the flame switches off in normal working position:
If the flame goes out in normal working position, the appliance repeats the start-up cycle (max 3 cycle repetitions);
the fourth consecutive time the flame goes out in normal working position causes a block shutdown.
Every 510 seconds an additional flame is allowed to go out, always up to a maximum of 4 consecutive.
Start-up prevented in presence of parasite flame:
If the system detects the presence of a parasite flame signal it signals the anomaly and if this anomaly lasts for
more than 10s the block shutdown occurs.
No flame signal detection at the end of the safety time:
If the appliance does not detect flame signals at the end of the safety time, a block shutdown is carried out
Checking the amount of gas on start-up
The amount of gas on start-up is checked by applying the following formula:
Ts x Qs ≤ 100
where
Ts = Safety time in seconds
Qs = Energy released in safety time expressed in Kw
Qs
=
Q1 3600 8127
Ts1 1000 860
x
x
x
100
Qn
