Gira 2330 02 Notice D'installation Et D'utilisation page 34

Attention
Breaking out the slide switch cover will invalidate the CE conformity of
the smoke detector in accordance with EN14604 and invalidate the
German Association of Property Insurers (VdS) Approval.
4) Reconnect the 9 V block battery to the battery connector and insert the
battery into the battery holder.
5) Carry out a function test (Section 7).
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3) Set both slide switches to the
"ON" position (see figure) to
deactivate smoke detection.