Ferroli PEGASUS 56 LN Instrucciones De Uso, Instalación Y Mantenimiento página 28

Opening the front casing
To open the boiler front panel, see the sequence in fig. 52.
fig. 4 - Front panel opening
B
Before carrying out any operation inside the boiler, disconnect the power and
close the gas cock upstream.
Cleaning the boiler and flue
For proper cleaning of the boiler (see fig. 53):
• Close the gas cock ahead of the boiler and disconnect the power supply
• Remove the front panel of the boiler (fig. 52).
• Lift the casing cover by pressing upwards.
• Remove the insulation 5 covering 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. The same operation can be car-
ried out from the bottom upwards.
• Clean the fume evacuation 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 the combustion ducts.
• During cleaning operations take care not to damage the fume thermostat bulb at the
back of the fume chamber.
fig. 5 - Boiler cleaning
1 Casing cover
2 Fume chamber closing plate
3 Flue brush
4 Combustion analysis plug
5 Insulation
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EN
1
2
1
5
2
4
3
cod. 3540S232 - Rev. 01 - 02/2015
Combustion analysis
A fume sampling point has been included in the upper part of the anti-backflow device
inside the boiler (see fig. 54).
To take the sample:
1. Remove the top panel of the boiler
2. Remove the insulation covering the anti-backflow device
3. Open the fume sampling point;
4. Insert the probe;
5. Adjust the boiler temperature to maximum.
6. Wait 10-15 minutes for the boiler to stabilise*
7. Take the measurement.
fig. 6 - Combustion analysis
Analyses made with a non-stabilised boiler can cause measurement errors.
A
Burner assembly removal and cleaning
To remove the burner assembly:
1. Disconnect the power supply and turn off the gas ahead of the boiler;
2. Remove the gas valve electronic controller (fig. 7);
3. Disconnect the cables of the electrode assembly;
4. Unscrew the ring fixing the gas pipe ahead of the gas valve;
5. Undo the two nuts fixing the combustion chamber door to the cast iron elements of
the boiler (fig. 8)
6. Remove the burner assembly and combustion chamber door.
Check and clean the burners. Only use a non-metal brush or compressed air to clean the
burners; never use chemical products.
PEGASUS 56 LN
fig. 7
fig. 8