38
6.15 Refilling or emptying
Before carrying out the operation described below, isolate the
boiler power supply.
Ensure that the inhibiter concentration is correct on refilling.
Fig. 43
6.15.1 Method of filling a sealed system
A sealed system must only be filled by a competent person
using a method similar to that shown in figure below.
Stop
valve
Stop
valve
TAP
Hose
unions
Double check
valve
Filling loop
temporarily connected
Mains
water supply
Heating
cicuit return
Fig. 44
6.15.2 SYSTEM Filling
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
1
Fig. 45
Heating circuit:
– open the isolation and air bleeding valves in the highest
points of the system
– loosen the automatic bleed valve (3)
– open the heating circuit isolation valves (8) and (9)
– activate the filling system "Method of filling a sealed sys-
tem", and fill the heating system until a pressure of
1-1.2 bar
is shown on the pressure gauge (5)
– stop the filling system
– check that there is no air in the system by bleeding all the
radiators and the circuit in the various high points of the
system.
3
8
Fig. 46
NOTE:
to completely remove all air from the system, it is rec-
ommended that this operation is repeated a number of times.
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