Ferroli Pegasus LN 2S Serie Mode D'emploi, Installation Et Entretien page 38

Combustion analysis
A point for sampling fumes has been included inside the boiler in the upper part of the anti-backflow device (see
fig. 11).
To take the sample:
1) Remove the top panel of the boiler (see Fig. 4)
2) Remove the insulation on the anti-backflow device
3) Open the fume sampling point;
4) Insert the probe;
5) Adjust the boiler temperature to the maximum.
6) Wait 10-15 minutes for the boiler to stabilize*
7) Take the measurement.
*Analyses made with an unstabilized boiler can cause
measurement errors.
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 flame controllers to the gas valve (fig. 12) and remove them from
the gas valves (fig. 13).
• Unscrew the screws securing the connectors to the gas valves and extract them from these valves.
• Disconnect the ignition and ionization cables from the electrode unit;
• Unscrew the nuts securing the gas supply pipe upstream from the gas valves (Fig. 14).
• Unscrew the two nuts attaching the combustion chamber door to the cast iron elements of the boiler (fig. 15)
• 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, fit it all back together in reverse order.
38
fig. 12
fig. 14
Cod. 3540G310 - 03/2007 (Rev. 02)
Pegasus LN 2S
Fume sampling point
fig. 11
fig. 13
fig. 15
EN