10.2 Standard inspection and maintenance operations
10.2.1 Periodic check and maintenance procedure
Warning
Before performing any operation, make sure the boiler is not
powered on. Once the maintenance operations are complete,
reset the original boiler operating parameters if they were
changed.
Warning
Wait for the combustion chamber and pipes to cool down.
Important
The appliance must not be cleaned using abrasive, aggressive
and/or easily flammable substances (e.g. petrol or acetone).
The following checks must be performed every year in order to ensure
efficient boiler operation:
1. Check the appearance and seal of the gaskets in the gas circuit and
the combustion circuit;
2. Check the condition and correct position of the flame detection and
ignition electrode;
3. Check the condition of the burner and that it is correctly fastened;
4. Check for any impurities located inside the combustion chamber. To
do so, use a vacuum cleaner or the cleaning kit available as an
accessory;
5. Check the pressure of the heating system;
6. Check the pressure of the expansion vessel;
7. Check that the fan is working correctly;
8. Check that the intake and exhaust pipes are not obstructed;
9. Check for any impurities inside the siphon;
10.2.2 Checking the water pressure
In order for the boiler to operate correctly, the pressure of the water in the
heating circuit must be between 1.0 and 1.5 bar. Restore the water
pressure if necessary.
10.2.3 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.
10.2.4 Checking the automatic air vent
Check that the pump venting valve is working. In the event of a leak,
replace the valve.
10.2.5 Checking the burner and cleaning the heat exchanger
1. Isolate the unit from the gas & electrical supplies.
2. Remove the front panel.
3. Remove the silencer.
Important
Reposition the silencer inside the boiler before refitting the air-gas
unit.
4. Open the air/gas cover and remove all the connectors from the PCB.
Fig.49
PN-0000382
10 Maintenance
7696317 - 1 - 21032018
55
