Ferroli PEGASUS F2 N 2S Instructions For Use, Installation And Maintenance page 22

Disassembly and cleaning the burner unit
to remove the burner unit:
• Disconnect the electrical power supply and turn off the gas ahead of the boiler.
• Unscrew the two screws securing the electronic fl ame controller to the gas valve (Fig. 17) and
extract it from this valve (Fig. 18).
• Unscrew the screws securing the connectors to the gas valves (see Fig. 14) and extract them
from these valves.
• Disconnect the ignition and ionization cables from the electrode unit;
• Unscrew the nut securing the gas supply pipe upstream from the gas valve (Fig. 19). For model
102, unscrew the two nuts;
• Unscrew the two nuts attaching the combustion chamber door to the cast iron elements of
the boiler (Fig. 20).
• Remove the burner assembly and combustion chamber door.
At this point, check and clean the burners. Only use a non-metallic brush or compressed air to clean
the burners; never use chemical products.
On completion, fi t it all back together in reverse order.
22
fi g. 17
fi g. 19
Pegasus F2 N 2S
fi g. 18
fi g. 20