Biasi GARDA HE SYSTEM M96.28SR/P User Manual And Installation Instructions page 12

Useful advice
If the pressure on the temperature and pres-
sure gauge (4 on page 2) has gone down...
it is necessary to top up the appliance with water
again, so as to raise the pressure to an adequate
level as described in the section 2.2 of this manual.
If topping up with water has to be done very fre-
quently, have the system checked for leaks.
If water comes out of the pressure relief valve
Check on the temperature and pressure gauge (4
on page 2) that the pressure in the central heating
circuit is not close to 3 bars. In this case, tempera-
ture rise in the circuit can cause the pressure relief
valve to open.
So that this does not happen and to decrease the
pressure to a normal value, it is advisable to vent
8
some of the water in the appliance through the
bleed valves present in the radiators.
If water should occasionally leak from the
boiler...
shut off the valves positioned under the boiler
(Fig. 2.8 on page 6) and call an Authorised Service
Centre Engineer.
If the left appliance operation light 9 (Fig. 3.3)
flashes very quickly the boiler is detecting a
fault.
Fig. 3.3
In this case or in case of problems other than
those mentioned here, switch off the boiler, as
described in section 2.5 on page 6 and call a
competent and responsible service engineer.