Maintenance; 5.1 Control Box Visual Diagnostic - Riello Gulliver RG3 393T1 Manuel D'entretien

5.

MAINTENANCE

Disconnect the electric supply to the burner by switching off the main power switch and close the light
oil shut-off valve before maintaining or checking the system.
The burner requires scheduled maintenance that must be carried out by qualified personnel and in compliance
with local legislation.
Scheduled maintenance is vital for the smooth operation of the burner; it avoids waste of fuel and reduces harm-
ful emissions into the atmosphere.
THE FUNDAMENTAL OPERATIONS TO CARRY OUT ARE AS FOLLOWS:
 Check there are no occlusions or obstructions in the inlet or return pipes, in the air suction areas and in the
combustion product waste pipe.
 Check that the positioning of the combustion head is correct and that it is properly fixed to the boiler.
 Clean the combustion head at the fuel outlet.
 Clean the fuel suction line filter and the pump filter.
 Check that the burner electrical connections are correct.
 Clean the flame detector.
 Check for correct fuel consumption.
 Check that the combustion head (fig. 13, page 8) and the air damper (fig. 13, page 8) have been regulat-
ed properly.
 Replace the nozzle (fig. 11, page 8) if necessary and check the correct position of electrodes (fig. 10,
page 7).

Clean the fan.
Leave the burner working without interruptions for 10 min. and check the right settings at 1
of all components stated in this manual. Then carry out the analysis of the combustion by checking:
- Smoke index as per the Bacharach scale;
- NOx content (ppm);

5.1 CONTROL BOX VISUAL DIAGNOSTIC

The control box has a diagnostic function that can identify the likely causes of any malfunctions (indicator:
RED LED).
In order to be able to use this function, press and hold the reset button for at least 3 seconds from when the
appliance is made safe (lock-out).
The control box sends a sequence of pulses that are repeated at 2-second intervals.
RED LED illuminated
press reset for 3 sec.
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

4 pulses

3280
- CO
- Smoke temperature at the chimney.
    
The flame does not stabilise at the end of the safety time:
– flame detector faulty or dirty;
– oil valve faulty or dirty;
– faulty ignition transformer;
– poor burner regulation.
Light present in the chamber before the burner's switching on or off:
– presence of a strange light before or after the limit thermostat switching
over;
– presence of a strange light during pre-purging;
– presence of a strange light during post-ventilation.
percentage (%);
2
Interval
Pulses
PROBABLE CAUSE
13 GB
st nd
and 2
- CO content (ppm);
2s
Pulses
    
stage