Table of Contents
Advertisement
The sequence of pulses issued by the control box identifies the possible types of malfunction, which are
listed in the table below.
SIGNAL
2 pulses
3 pulses
4 pulses
7 pulses
10 pulses
MAINTENANCE
Before cleaning or performing checks, switch off the burner's power supply with the system's master
switch and close the gas shutoff valve.
The burner requires periodic maintenance carried out by a qualified and authorised technician in conformity
with legislation and local standards.
Periodic maintenance is essential for the reliability of the burner, avoiding the excessive consumption of fuel
and consequent pollution.
THE BASIC OPERATIONS ARE:
Checking that there are no obstructions or kinks in the supply or return oil pipes, in the air intake regions
and the combustion product discharge tubes.
Checking that the burner and gas train electrical connections are correct.
Checking that the gas train is suitable for the burner's power, the type of gas used and the mains gas
pressure.
Checking the proper positioning of the combustion head and its fixing to the boiler.
Checking the proper positioning of the air damper.
Checking the proper positioning of the ionisation probe and electrode.
Checking the adjustment of the air pressure switch and the gas pressure switch.
Let the burner work at full speed for approximately ten minutes, correctly adjusting all the elements indicated
in this manual. Then carry out the analysis of the scale combustion by checking:
Percentage of CO
(%);
2
Ionisation current (μA);
The flame does not stabilise at the end of the safety time:
– faulty ionisation probe;
– faulty or soiled gas valves;
– neutral/phase exchange;
– faulty ignition transformer
– poor burner regulation (insufficient gas).
Minimum air pressure switch does not close:
– make sure VPS trips to produce lockout;
– air pressure switch faulty;
– air pressure switch incorrectly regulated;
– fan motor does not run;
– maximum air pressure switch operating.
Min. air pressure switch does not open or light in the chamber before firing:
– air pressure switch faulty;
– air pressure switch incorrectly regulated.
Loss of flame during operations:
– poor burner regulation (insufficient gas);
– faulty or soiled gas valves;
– short circuit between ionisation probe and earth.
– Wiring error or internal fault.
CO Content (ppm);
Flue gases temperature at the flue.
PROBABLE CAUSE
11
NOx content (ppm);
20025473
Advertisement
Table of Contents
