Gree GUD35ZD/A-T Owner's Manual page 23

DC Inverter U-match Series Floor Ceiling Type Unit
Ceiling type
Hanger
Nut
Left side panel
Right side panel
(6) Adjust the height of the unit to make the drain pipe slant slightly downward so
that the drainage will become much smoother.
3.2.1.3 Leveling
The water level test must be done after installing the indoor unit to make the
unit is horizontal, as shown below.
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