10
To shut down the boiler switch off the electrical supply to the appliance.5. Turning off the boiler
The boiler is equipped with a hydraulic differential pressure switch that will inhibit the operation of
the boiler in the event of the pump seizing or running dry.
Important: Regularly check that the pressure displayed by the manometer (11 - Figure 20) is 1 to 1.5
bar, with boiler not operating. In case of overpressure, open the boiler drain valve.
In case the pressure is lower open the boiler filling tap (Figure 5a or 5b).
We recommend you open the tap very slowly in order to let off the air.
In case pressure drops occur frequently have the boiler checked by a Qualified Service Engineer.
4. Filling the boiler
020503_0400
Boiler filling tap
Boiler drain valve
Figure 5a
LUNA HT 280 - HT 330
0010270500
Figure 5b
LUNA HT 1.120 - HT 1.240 - HT 1.280
Boiler filling tap
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