Coway APM-1010DH Instructions Manual page 16

FILLINg UP THE wATER TANk
To fill the water tank with water
1
Separate the water tank from the side of the product by pulling the
separation catch.
2 Separate the water tank cap by turning it counterclockwise.
3 Fill the water tank with water and turn the water tank cap clockwise
until you hear a popping sound.
Do not touch the anti-scale filter of the water tank cap as this may result in a problem with the
product performance.