Ferroli PEGASUS D Instrucciones De Uso página 32

Opening the front panel
To open the front panel, see the sequence in fig. 18.
B
Before carrying out any operation inside the boiler, disconnect the electrical
power supply and close the gas cock upstream.
fig. 18 - Front panel opening
Cleaning the boiler and flue
To clean the boiler properly (fig. 19):
• Close the gas cock ahead of the boiler and disconnect the electrical power.
• 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 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 be careful not to damage the fume thermostat bulb at
the back of the fume chamber.
fig. 19 - Boiler cleaning
1 Casing cover
2 Fume chamber closing plate
3 Flue brush
7 Combustion analysis plug
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. 19).
To take the sample:
1. Remove the upper panel of the boiler
2. Remove the insulation placed over the anti-backflow device;
3. Open the fume sampling point;
4. Insert the probe;
5. Activate the TEST mode
6. Wait 10-15 minutes for the boiler to stabilise*
7. Take the measurement.
Analyses made with an unstabilised boiler can cause measurement errors.
A
32
EN
Removing and cleaning the burner assembly
To remove the burner assembly:
• 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. 20)
• Remove the burner assembly and combustion chamber door.
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.
Pilot burner assembly
1
2
7
3
1 Combustion chamber door
2 Inspection door
3 Pilot burner
4 Ignition electrode
5 Detection electrode
6 Pilot nozzle
7 High voltage cable
8 Gas supply pipe
cod. 3540U171 - 06/2012 (Rev. 00)
PEGASUS D
fig. 20 - Removing the burners
3 ÷ 4 mm
3
4
5
8
fig. 21 - Pilot burner