64
912.403.1 - IE
IstructIons pErtaInIng to thE InstallEr
Drill a hole in the flue at a distance from the boiler equivalent to twice the diameter of the flue to measure
combustion efficiency and combustion flue composition in accordance with the rules in force. Use this hole to
measure the following parameters:
• Combustion flue temperature
• Oxygen (O
2
) or carbon dioxide (CO
2
) concentration.
• Carbon monoxide (CO) concentration.
Measure the temperature of combustion air near the air inlet to the boiler. The necessary hole must be made by
the technician responsible for the heating system when the system is first started up, and must then be closed
to ensure that the flue remains properly sealed during normal operation.
17. check of combustion parameters
Figure 15
LOCATION OF FLUE TEST
POINT HOLE
Important! Close the flue test point
hole on completion of measurements.
Figure 14
16. positioning of the ignition and flame sensing electrode
0503_2204
0510_1905/CT_0616
BOILER FLUE TEST
POINT HOLE
