For more information, see
Checking and setting the gas/air ratio, page 42
10.3.5 Checking the automatic air vent
1. Switch off the boiler's electrical connection.
2. Close the gas tap under the boiler.
3. Close the main gas tap.
4. Unscrew the two screws located under the front housing by a quar
ter turn and remove the front housing.
5. Tilt the instrument box forwards by opening the clips on the sides.
6. Check whether water is visible in the hose of the automatic air vent.
7. In the event of a leak, replace the air vent.
Fig.59 Checking the automatic air vent
AD-3000076-01
6
5
5
5
4
90º
4
1
Gas/Gaz
2
3
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