Combustion Analysis - Ferroli PEGASUS D 30 K 100 LN Instructions D'utilisation, D'installation Et D'entretien

Cleaning the boiler and flue
To clean the boiler properly (fig. 21):
• Close the gas cock ahead of the unit and disconnect the power supply.
• Remove the front panel of the boiler.
• Lift the casing cover by pressing upwards.
• Remove the insulation placed over the anti-backflow device.
• Remove the fume chamber closing plate.
• Remove the burner assembly (see next section).
• Clean from the top downwards, using a flue brush.
• Clean the fume exhaust ducts between the cast iron elements of the boiler shell with
a vacuum cleaner.
• Carefully refit all the previously removed parts and check the tightness of the gas
circuit and combustion ducts.
• During cleaning operations take care not to damage the fume thermostat bulb at the
back of the fume chamber.
5
6
fig. 21 - Boiler cleaning
1 Casing cover
2 Fume chamber closing plate
3 Flue brush
4 Magnesium anode
5 Flange
6 Hot water tank front panel
7 Combustion analysis plug
Hot water tank cleaning (to be carried out every 2-3 years, depending on water ag-
gressiveness)
• Remove the front panel of the hot water tank (6 - fig. 21).
• Close the hot water tank on-off valves and open the drain cock.
• After draining, remove the inspection flange and carry out cleaning. Use specific
products available on the market. Do not use metal tools to remove the scale.
• After cleaning, refit the inspection flange and hot water tank front panel and open
the on-off valves.
Magnesium anode
The degree of deterioration of the magnesium anode (4 - fig. 21) can be checked directly
from the outside by unscrewing it from the hot water tank flange (after turning off the do-
mestic hot water supply and draining the hot water tank).
This check is advisable at least once a year.
If the water is very hard, above 20 degrees French, install a water softener in the system.
40 EN
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Draining the hot water tank and heating system
•
•
•
A
1
2
7
3
A - Shutter locked
B - Shutter released

Combustion analysis

A point for sampling fumes has been included inside the boiler, in the upper part of the
anti-backflow device (detail 7 - fig. 21).
To take the sample:
1.
2.
3.
4.
5.
6.
7.
4
A
Removing and cleaning the burner assembly
To remove the burner assembly:
•
•
•
•
Then check and clean the main burners and pilot burner. Use a non-metal brush or com-
pressed air to clean the burners; never use chemical products.
cod. 3540T306 - Rev. 01 - 02/2015
PEGASUS D 30 K 100 LN
To drain the hot water tank, use the drain cock 233 of fig. 25 after closing the valves
for filling from the water system; use a hot water drawing point (washbasin, shower,
etc.) as a vent.
To drain the heating system completely, use the cock 275 of fig. 25 after releasing
the shutters of the two non-return valves detail 179 of fig. 25 (also see fig. 22). Use
the radiator valves as vents.
If the boiler is connected to the system by service gate valves, check their complete
opening. If the boiler is positioned higher than the radiators, the part of the system
including the radiators must be drained separately.
To drain just the water contained in the boiler, close the on-off valves and fully open
the cock (255 - fig. 25). Then release the shutters of the non-return valves (179 -
fig. 25). Lastly, open the cock 197 of fig. 25).
Before filling the system again, remember to close the drain cock and radiator
vent valves and lock the shutters of the non-return valves 179 of fig. 25.
A
fig. 22
Remove the upper panel of the boiler
Remove the insulation placed over the anti-backflow device;
Open the fume sampling point;
Insert the probe;
Activate the TEST mode
Wait 10-15 minutes for the boiler to stabilise*
Take the measurement.
Analyses made with an unstabilised boiler can cause measurement errors.
Disconnect the electrical power supply and turn off the gas ahead of the boiler;
Undo the nut fixing the gas supply pipe ahead of the gas valve;
Undo the two nuts fixing the combustion chamber door to the cast iron elements of
the boiler (fig. 23)
Remove the burner assembly and combustion chamber door.
fig. 23 - Removing the burners
B