HP POD 20c Maintenance And Service Manual page 54

Remove the four screws that secure the humidifier body to the wall (1), and then remove the humidifier
11.
(2).
Replacing the humidifier
Replace the humidifier (1), and then secure the humidifier to the wall with four screws (2).
1.
Connect the drain (1).
2.
Connect the humidifier to the water supply line (2).
3.
Removal and replacement procedures 54