Refilling Or Emptying; 2.14.1 Refill Operations; 2.14.2 Emptying Operations - Sime Brava Slim HE 25 T Manual De Instalación Y Mantenimiento

EN
2.14

Refilling or emptying

Before carrying out the operation described below, make sure
that the main system switch is set to "OFF".
OFF

2.14.1 REFILL operations

The Brava Slim HE 25 T boilers are not equipped with a filling
valve which must be prearranged on the system return.
Remove the front panel:
– remove the two screws (1), pull the front panel (2) forwards
and release it from the top by lifting it.
2
Domestic hot water circuit (storage tank):
– open the isolation valves of the domestic hot water circuit
(if present)
– open one or more than one hot water valve to fill and bleed
the domestic hot water circuit
– 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 (3)
– open the isolation valves of the heating circuit (if present)
– open the filling valve, which is to be prearranged on the sys-
tem return, and fill until the pressure reaches 1-1,2 bar
– 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 (4) of the pump and use a screwdriver
to check that the impeller is not blocked
– replace the plug (4)
Fig. 27
1
Fig. 28
to completely remove all air from the system, it is recom-
NB:
mended that this operation is repeated a number of times.
– check the pressure in the system and if necessary top up
until the correct pressure is reached
– 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.

2.14.2 EMPTYING operations

Domestic hot water circuit (storage tank):
– close the domestic hot water circuit isolation valve (prear-
ranged in installation)
– open the drain valve prearranged on the storage tank or the
system.
Boiler:
– loosen the automatic bleed valve (3)
– close the heating circuit isolation valves (prearranged in in-
stallation)
– check that the filling valve which was prearranged during
installation 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 (3).
4 3
Fig. 29
3 5
Fig. 30
75