BMW F48 Technical Training Manual page 53

F48￿General￿Vehicle￿Electronics
5.￿Heating/Air￿Conditioning￿Systems
Two￿microfilters￿are￿installed￿in￿the￿F48.￿The￿BMW￿repair￿instructions￿must￿be￿followed￿for￿the
replacement￿of￿the￿microfilters.
5.1.4.￿Air/Water￿separation￿(Venturi￿adapter)
F48￿air/water￿separation￿(Venturi￿adapter)
So￿that￿no￿water￿enters￿the￿heating￿and￿air-conditioning￿unit,￿a￿cover￿(Venturi￿adapter)￿is￿installed
before￿the￿air￿intake￿in￿the￿engine￿compartment.
The￿fresh￿air￿drawn￿in￿is￿accelerated￿by￿the￿design￿of￿the￿Venturi￿adapter￿and￿redirected￿90°.
Through￿this￿process￿the￿water￿separates￿at￿the￿cover￿and￿then￿drains￿off￿downwards.
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