Carrier ZC Series Owner's Manual page 19

The other end of the hose must be connected to the
rain water drain.
IMPORTANT
Remove the existing plug in the inside
portion of the unit, the "highest one",
located next to the letter "A".
The installation of this draining system is
recommended for most kinds of
installation (for example: on walls with
sash or on windows), since this makes
easier to connect the drain hose to the
rain water drain.
IMPORTANT
To get the maximum performance with the
lowest power consumption, we recommend
using the draining system through the rear
outlet.
All manuals and user guides at all-guides.com
INSTALLING THE UNIT IN THE CABINET
Two people must install the unit on the cabinet in order
to guarantee its perfect balance and alignment.
Take care not to crease or bend the hose.
Lift the unit, align it with the cabinet, and slide it until
it is perfectly inserted.
Install the safety screw on both sides.
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