Positioning The Ignition And Flame-Sensor Electrode; Checking Combustion Parameters - Westen Boyler digit 240/40 Fi Manual Del Usuario

23. POSITIONING THE IGNITION AND FLAME-SENSOR ELECTRODE

Figure 15

24. CHECKING COMBUSTION PARAMETERS

To measure combustion performance and the toxicity of the products of combustion, the forced-flow boilers are fitted with two dedicated
taps on the concentric connector.
One test point is connected to the exhaust duct and is used to measure combustion efficiency and the toxicity of the products of
combustion.
The other is connected to the air intake duct and is used to check for the presence of any products of combustion circulating in installations
with co-axial flues.
The following parameters can be measured using the test point connected to the exhaust duct:
• temperature of the products of combustion;
• concentration of oxygen (O
• concentration of carbon monoxide (CO).
The temperature of the comburent air must be measured on the tap located on the air flue of the concentric connector.
For natural draught boiler models, a hole must be made in the exhaust duct at a distance from the boiler equal to twice the internal
diameter of the flue.
The following parameters can be measured inside this hole:
• temperature of the products of combustion;
• concentration of oxygen (O
• concentration of carbon monoxide (CO).
The temperature of the combustion air must be measured close to the point where the air enters the boiler.
The hole, which must be made by the person in charge of the system during commissioning, must be sealed so as to ensure that the
exhaust duct is airtight during normal operation.
INSTRUCTIONS FOR FITTERS
) or, alternatively, carbon dioxide (CO
2
) or, alternatively, carbon dioxide (CO
2
);
2
);
2
50
926.008.2 - EN