Burner Start-Up Cycle; Maintenance - Riello BS2/M TL Manuel D'entretien

5.8

BURNER START-UP CYCLE

Limit thermostat
Safety thermostat
Motor
{
2
Servomotor
1
0
Ignition transformer
Valve
nd
2 flame
st
1 flame
6.

MAINTENANCE

The burner requires periodic maintenance carried out by a qualified and authorised technician in conform-
ity with legislation and local standards.
Maintenance is essential for the reliability of the burner, avoiding the excessive consumption of fuel and
consequent pollution.
Before carrying out any cleaning or control always first switch off the electrical supply to the
burner acting on the main switch of the system.
THE BASIC CHECKS ARE:THE FUNDAMENTAL OPERA-
TIONS TO CARRY OUT ARE AS FOLLOWS:
Check at regular intervals that the holes of the gas head are

not obstructed. If they are, clean them with a suitable tool as
shown in the figure 14.
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 burner and gas train electrical connections are

correct.
Check that the gas train is suited to the burner capacity, the type

of gas used and the network gas pressure.
Check that the positioning of the combustion head is correct

and that it is properly fixed to the boiler.
Check that the air damper is positioned correctly.

Check that the ionisation probe and the electrode are positioned correctly (see fig. 8, page 7).

Check that the air pressure switch and the gas pressure switch are set correctly.

Leave the burner working without interruptions for 10 min. and checking the right 1 st and 2 nd stage
settings of all the components stated in this manual.
Then carry out a combustion check verifying:
CO percentage (%);
2
Flue gases temperature at the stack.
3134
24s Min. 30s
2.5s
CO content (ppm);
15  25s
3s
11s
NOx content (ppm);
14 GB
D4435
11s
3s max.
Fig. 14
E9252
Ionisation current (µA);