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Fig.74
Filling and drain valve location
6.1.2
Filling the siphon
Fig.75
Filling the siphon
3
1
6.1.3
Preparing the gas circuit
Fig.76
Gas inlet pressure measuring point
6.1.4
Setting the gas leakage monitoring (VPS)
7734324 - v.07 - 21092022
AD-3001559-01
4
2
5
AD-3001600-02
P1
AD-3001560-02
2. Fill the central heating system with clean water, using the filling and
drain valve (½", fitted on the front section).
3. Check the water-side connections for tightness.
4. Power up the boiler.
Danger
The siphon must always be sufficiently filled with water. This
prevents flue gases from entering the room.
1. Turn the clip counterclockwise to access the sealing cap.
2. Remove the sealing cap from the condensate collector.
3. Fill the siphon up to the mark via the condensate collector.
4. Put the sealing cap back on the condensate collector.
5. Turn the clip clockwise to secure the sealing cap.
Warning
Ensure that the boiler is disconnected from the power supply.
1. Open the main gas valve.
2. Open the boiler gas valve.
3. Check the tightness of the gas circuit.
4. Vent the gas supply pipe by unscrewing measuring point P1.
The gas supply pipe is properly vented when a gas smell can be
noticed.
5. Check the gas inlet pressure at measuring point P1.
The advised inlet pressure is shown on the data plate.
Caution
The inlet pressure may never exceed the maximum pressure
mentioned in the technical data table.
6. Tighten the measuring point again.
When the boiler is equipped with a VPS, it must be set to 50% of the gas
inlet pressure. Proceed as follows:
6 Preparation of commissioning
43
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