12 Drain the defrosting water via the defrosting water valve on the left-hand
side of the unit. To do so, connect a hose to the hose connector and
collect the defrosting water in a suitable vessel.
13 Keep the freeze-dryer open (i.e. without the lid or drying chamber) when
it is not in use so that moisture can evaporate. This increases the
service life of the vacuum sensor.