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INSTRUCTIONS PERTAINING TO THE INSTALLER 926.772.1 - GB/IE
Figure 18
020429_0300
gasket
combustion air
ue gas
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 specically designed for this purpose.
One of the two test points is connected to the exhaust ue duct to allow measurements of the combustion
products and efciency.
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 ue duct test point allows measurements of the following:
• combustionproductstemperature;
• concentrationofoxygen(O
2
) or, alternatively, of carbon dioxide (CO
2
);
• concentrationofcarbonmonoxide(CO).
The comburant air temperature must be measured at the test point connected to the air inlet duct.
19. CHECK OF COMBUSTION PARAMETERS
Figure 17
CT_0826 / 1003_1001