Mini split question

Envisioning a 4 room, 2nd floor setup. I assume that the registers (cassets) would be located where the wall and ceiling meet. The attic above is where the linesets and condensate lines would be located.
How is the condensate carried up and away to drain? Is there a pump mechanism in the cassets?
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Read the directions.....
The cassette does not get mounted where the ceiling and wall meet, the directions/installation manual give min/max measurements for clearences. The condensate is carried away strictly by gravity.... liquids flow downhill and all that.
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