91.7.1 - GB/IE
InstructIons pErtaInInG to thE InstaLLEr
Figure 18
020429_0300
gasket
combustion air
flue gas
Figure 17
010905_0200
18. positioning of tHe ignition and flame sensing electrode
To measure the performance of combustion products, the forced draught boiler models are equipped with two
test points on the tapered coupling specifically designed for this purpose.
One of the two test points is connected to the exhaust flue duct to allow measurements of the combustion
products and efficiency.
The second test point is connected to the comburant air inlet duct to check possible combustion products
circulation in case of coaxial ducts.
The exhaust flue duct test point allows measurements of the following:
• combustion products temperature;
• concentration of oxygen (O
2
) or, alternatively, of carbon dioxide (CO
2
);
• concentration of carbon monoxide (CO).
The comburant air temperature must be measured at the test point connected to the air inlet duct.
19. cHeck of combustion parameters
