Beretta POWER PLUS Installation Instruction page 42

After a few minutes of continuous operation controlled by
the room thermostat, the adhesives and the processing
residues will have evaporated, and the following checks
can be completed:
- check the gas supply pressure;
- check combustion,
CHECKING THE GAS SUPPLY PRESSURE
- Move the main system switch to "off";
- Unscrew the fastening screws (1) on the front panel (2);
- Pull the base of the panel (2) outwards and then upwar-
ds to release it from the frame and then remove it;
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- Unscrew the screw on the pressure test point (3), loca-
ted upstream of the gas valve, around two turns, and
connect a pressure gauge;
- Power-up the boiler by moving the main system switch
and the main switch/switches on the appliance to "on".
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