Combustion Analysis - Ferroli PEGASUS 2S Série Mode D'emploi

Combustion analysis

A fume sampling point has been included inside the boiler, in the top part of the anti-
backflow device (see fig. 6).
To take the sample:
1. Remove the boiler top panel
2. Remove the insulation placed over the anti-backflow device
3. Open the fume sampling point;
4. Insert the probe;
5. Adjust the boiler temperature to max.
6. Wait 10-15 minutes for the boiler to stabilise*
7. Take the measurement.
fig. 6 - Combustion analysis
Analyses made with an unstabilised boiler can cause measurement errors.
A
Burner assembly removal and cleaning
To remove the burner assembly:
• Disconnect the power and turn off the gas ahead of the boiler.
• Remove the electronic flame controller "A" from the gas valve (fig. 7).
• On models 97 2S and 107 2S with 2 gas valves, undo the 2 screws securing the 2
electrical connectors that feed the second valve and remove them from it (fig. 8).
• Disconnect the ignition and ionisation cables from the electrode assembly.
• Undo the nut "B" fixing the gas feed pipe ahead of the gas valve (fig. 7). On models
97 2S and 107 2S, undo the 2 nuts (fig. 8).
• Undo the 2 nuts "C" fixing the combustion chamber door to the cast iron elements
of the boiler.
• Remove the burner assembly and combustion chamber door.
Check and clean the burners. Only use a non-metallic brush or compressed air to clean
the burners and electrodes; never use chemical products.
On completion, refit everything in reverse order.
B
A
C
fig. 7 - Models PEGASUS - 67 2S, 77 2S and 87 2S
32
EN
PEGASUS 67 ÷ 107 2S
A
Pilot burner assembly
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 feed pipe
C
cod. 3540S434 - Rev. 00 - 10/2020
B
B
C
fig. 8 - Models PEGASUS - 97 2S and 107 2S
fig. 9 - Pilot burner
C