Checking The Expansion Vessel; Checking The Flue Gas Discharge And The Air Supply; Checking Combustion; Checking The Automatic Air Vent Valve - DeDietrich 24 Installation And Service Manual

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10 Maintenance
10.3.2

Checking the expansion vessel

Check the expansion vessel and replace it if necessary. Check its pre-charge every year and restore the pressure to 1 bar if
necessary.
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 combustion

Measure the content of CO
10.3.5

Checking the automatic air vent valve

To access the boiler pump, remove the front panel and lower the control panel. Check that the pump air vent valve is working. In
the event of a leak, replace the valve.
10.3.6

Cleaning the siphon

Fig.133 Dismantling the siphon
3
2
A
4
5
198 INIDENS
/O and the flue gas discharge temperature at the dedicated measuring point.
2 2
1
BO-0000208
The front panel must be removed to extract the siphon (A). Proceed as
described below:
Lower the panel (1);
Remove the clip (2);
Unfasten the pipe from the heat exchanger (3);
Remove the siphon (4) and clean it;
Replace, if necessary, all the gaskets present;
Fill the siphon with water and reposition it in its seat (5).
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