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Les langues disponibles
OIL OPERATION
At the first ignition, when there is the passage from the first to the second flame, there is a strong decrease of fuel-
pressure owing to the filling of second nozzle pipe. This decrease can cause the burn-out of the burner.
GAS COMBUSTION CHECKS
CO
2
It is better to set the burner with CO
ting (for example draft variation) causes combustion with few air and with the production of CO.
CO
It must be not higher than 100 mg/kWh.
BURNER STARTING DIFFICULTIES AND THEIR CAUSES (GAS)
The control box is fitted with a disk which rotates during the start-up program and can be seen through the release
inspection window. When the burner does not start or stops because of a fault, the symbol which appears in the
inspection window indicates the type of interruption fault.
The control box does not start when the thermostats close:
• there is no gas:
• the min. gas pressure switch does not close the contact: it is incorrectly adjusted;
• the air pressure switch is set in operating position;
• the fuse of the control box has blown;
• the servomotor does not close the circuit, terminals 11 and 8 of the control box.
Halt after start-up:
• the servomotor does not close the circuit, terminals 9 and 8 of the control box.
Lock halt:
P
The air pressure switch does not effect a selection because of:
• a faulty contact;
• insufficient air pressure.
Lock halt:
Malfunctions of the flame detection circuit:
• photocell exhausted;
• fault internal amplifier.
Pre-ventilation halt:
• the servomotor does not close the circuit, terminals 10 and 8 of the control box.
Lock halt, no flame signal:
1
• photocell exhausted;
• photocell connection to the control box is interrupted;
• insufficient electrical detection current (min. 70 µA).
Lock halt in operation because of:
• no flame signal;
• no air pressure.
not higer than 10% (gas with Pci 8.600 kcal/m
2
25
3
). So you avoid that a little unset-
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