INSTALLATION INSTRUCTIONS
69-1576EF-02
HC18A, HC22A, HC26A
Humidifier Pad
APPLICATION
The HC18A, HC22A, and HC26A Humidifier Pads replace
the humidifier pad in the Flow-Through Humidifiers or
Aprilaire® Humidifiers. The humidifier spreads water over
the humidifier pad, and when warm air blows over the
water-soaked area, vapor is generated. As the vapor
circulates through the house, the relative humidity rises.
INSTALLATION
CAUTION
Personal Injury or Equipment Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power supply before installing or
servicing.
Turn off water supply.
IMPORTANT
Do not remove the powder from the new humidifier
pad. The powdery coating on the pad promotes
water dispersement.
1.
Remove the humidifier cover. See Fig. 1.
2.
Remove the humidifier pad assembly from the
humidifier by grasping the assembly and pulling it
toward you.
3.
Pry open the frame at the corners until the Perfect-
Flo™ water distribution tray lifts off.
4.
Gently pinch the water nozzle catches inward until
the water nozzle can be lifted off the tray.
5.
Slide the humidifier pad out of the frame.
RECYCLE NOTICE
This humidifier pad is recyclable. After removing
the pad from the humidifier, wash off the powder
and recycle the pad with the aluminum recyclables.
IMPORTANT
Be careful not to punch the frame to prevent leak-
ing.
6.
Carefully scrape any mineral deposits from the tray
and frame. Be sure nothing is blocking the frame
drain hole.
7.
Reattach the water nozzle to the PerfectFlo™ water
distribution tray.
8.
Insert the new humidifier pad into the frame.
IMPORTANT
Be sure the black line on the top of the humidifier
pad is facing up.
9.
Replace the water distribution tray. Be sure all four
tabs are in place.
10.
Place the humidifier pad assembly in the humidifier
housing and press until the assembly is completely
sealed. Be careful not to pinch or kink the water feed
tube.
Fig. 1. Humidifier components.
11.
Replace the humidifier cover.
12.
Turn on the power and water supply.
13.
To verify the humidifier operation, refer to the
Owner’s Guide Checkout Procedure section.
M12371C
WATER DISTRIBUTION TRAY
WATER FEED NOZZLE
HUMIDIFIER PAD
HUMIDIFIER
HOUSING
COVER
FRAME
WATER
FEED
TUBE
