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6.13.2 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 valve to fill and bleed the
domestic hot water circuit.
Boiler:
– loosen the automatic bleed valve (3)
– close the heating circuit isolation valves (prearranged in in-
stallation)
– check that the filling valve (4) is shut-off
– 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
4
Fig. 39
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