McQuay MQS-174018-CFC216A Installation And Operation Manual page 18

DC Inverter U-match Series Floor Ceiling Type Unit
◆Ceiling type
(6). Adjust the height of the unit to make the drain pipe slant slightly downward so
that the drainage will become much smoother.
5.1.4 Leveling
The water level test must be done after installing the indoor unit to make the unit is
horizontal, as shown below.
Fig. 4.4
Fig. 4.5
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