49
5.15.2 SYSTEM Filling
The
Murelle Revolution 30
boilers are not equipped with a fill-
ing valve which must be prearranged on the system return. The
procedure is described below.
Remove the front panel:
if the front panel has not already been removed, open the two
catches (1), unscrew the two screws (2), pull the front panel (3)
forwards and release it from the top by lifting it.
3
2
1
2
Fig. 96
Domestic hot water circuit:
– open the isolation valves of the domestic hot water circuit (if
present)
– open each of the DHW taps until air is expelled
– once bleeding has been completed, close the hot water
valves.
Heating circuit:
– open the isolation and air bleeding valves in the highest
points of the system
– loosen the automatic bleed valve (4)
– 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
– close the automatic bleed valve (4)
– Continue filling until the pressure reaches
1-1.2
bar 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
4
Fig. 97
NOTE:
to completely remove all air from the system, it is rec-
ommended 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
– it is recommended that the condensate trap is filled prior to
fitting the flue, by carefully pouring water into the exhaust
connection.
Refit the front panel of the boiler hooking it on at the top, push-
ing it forwards and securing it by first closing the catches (1)
and then tightening the screws (2) which were removed pre-
viously.
5.15.3 EMPTYING operations
Domestic hot water circuit:
– close the domestic hot water circuit isolation valve (prear-
ranged in installation)
– open one or more than one hot water taps and drain the do-
mestic hot water circuit.
Boiler:
– loosen the automatic bleed valve (4)
– close the heating circuit isolation valves (prearranged in in-
stallation)
– check that the filling valve which was prearranged during in-
stallation is closed
– connect a rubber hose to the boiler drain valve (5) and open it
– when it has fully emptied, close the drain valve (5)
– close the automatic bleed valve (4).
4
5
Fig. 98
