30
8.14 Refilling or emptying
Before carrying out the operations described below, make
sure that the main system switch is set to "ON" in order for the
display to show the pressure level in the system during refilling.
Make sure that the operating mode is set to "Stand-by";
if this is not
the case, press the button
y
for at least 1 second until this
mode has been selected.
ON
Fig. 36
8.14.1 REFILL operations
Remove the front panel:
– disassemble the smoke outlet duct of the
Brava Slim HE 20 R e
and
Brava Slim HE 40 R e
, if fitted
– remove the two screws (1), pull the front panel (2) forwards
and release it from the top by lifting it.
2
1
Fig. 37
Heating circuit:
– open the isolation and air bleeding valves in the highest points
of the system
– loosen the automatic bleed valve (3)
– open the isolation valves of the heating circuit (if present)
– Open the filling valve, which should be on the system return
– Fill until the water overflows from the air bleeding valves and
shut off the valves again
– Continue filling until the pressure reaches
1-1.2
bar (100-120
kPa) as shown on the display
– close the filling valve
– check that there is no air in the system by bleeding all the
radiators and the circuit on the high points of the system
– remove the front plug (6) of the pump and use a screwdriver
to check that the impeller is not blocked
– replace the plug (6)
6
3
Fig. 38
NOTE:
to completely remove all air from the system, it is
recommended that this operation is repeated a number of times.
– check the pressure on the display and if necessary top up until
the correct pressure reading appears
– close the automatic bleed valve (3)
– fill the siphon disconnecting it from the pipe or using (by
means of) the smoke take-off point.
Refit the front panel of the boiler hooking it on at the top,
pushing it forwards and securing it with the screw (1) which was
removed previously.
Fit the smoke outlet duct of the
Brava Slim HE 20 R e
and
Brava
Slim HE 40 R e
.
8.14.2 EMPTYING operations
Boiler:
– loosen the automatic bleed valve (3)
– close the heating circuit isolation valves
– check that the filling valve is closed
– connect a rubber hose to the boiler drain valve (7) and open it
– when it has fully emptied, close the drain valve (7)
– close the automatic bleed valve (3).
3
7
Fig. 39
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