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6.11.2 EMPTYING operations
Prior to performing drainage operations, check that the sys-
tem’s main switch is set to “OFF” and that the master switch of
the boiler is set to 0 (“off”):
– check that the water system isolation devices are closed
Fig. 35
– connect a funnelling pipe to the system’s drainage valve (1)
and open it.
When it has fully emptied, close the system drain valve (1).
