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Fig.69
Dismantling the siphon
Fig.70
Electrode distance
8.0
±
1
64
800 System 2
10.3.3
Checking the flue gas discharge and the air supply
Check the entire line of flue gas pipes, in particular the tightness of
the flue gas evacuation and combustion air intake connections.
10.3.4
Checking the combustion
Measure the O
2
flue gas measuring point. To do this, proceed as follows:
Heat the water in the boiler to a temperature of approx. 70 °C.
Unscrew the plug of the flue gas measurement point (exhaust system
adaptor).
Measure the content of O
equipment. Compare this with the control value.
10.3.5
Checking the automatic air vent
Check that the boiler pump venting valve is working. In the event of a
leak replace the valve.
10.3.6
Cleaning the siphon
The front panel must be removed to extract the siphon (A). Proceed as
described below:
Remove the screw (2);
Remove the clip (1);
Unfasten the pipe from the heat exchanger (4);
Remove the siphon (3) and clean it;
Replace, if necessary, all the gaskets present;
Fill the siphon with water.
Assembly is the reverse of the above steps.
10.3.8
Electrode distances
Verify the distances between the electrode and the burner and between
4.5
±
0.5
/CO
contents and the temperature of the flue gases at the
2
/CO
in the flue gas using the measuring
2
2
10 Maintenance
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