Honeywell He480a1006 Owner's Manual

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HE420A Steam Power
Humidifier

OWNER’S GUIDE

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HE420A STEAM POWER HUMIDIFIER

WELCOME...

to the comfortable world of humidified air. With your Honeywell humidifier you will
notice a decrease in dry skin, scratchy throats and irritated nasal passages that
aggravate allergies and asthma. You’ve also taken the first step to stopping the
“zapping” created by walking on your carpet and touching your TV, computer, metal
door knob or your pet. You can even put away your glue bottle because your furniture
and woodwork will stop drying out. Congratulations! You have just made a great
investment in your home comfort.

TABLE OF CONTENTS

Operating Your Humidifier ................................................................................. 3

How Your Humidifier Works ............................................................................... 4

Maintaining Your Humidifier ............................................................................... 4

Cleaning Your Humidifier ................................................................................... 5

Checking Your Humidifier Operation ................................................................. 7

Troubleshooting ................................................................................................. 7

Warranty ............................................................................................................ 8

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HE420A STEAM POWER HUMIDIFIER

OPERATING YOUR HUMIDIFIER

The HE420A Honeywell Humidifier is controlled by an Automatic Humidity Control.
The Automatic Humidity Control is mounted in the return air duct where it can be
exposed to the air stream of the return air and is designed to automatically adjust the
humidity level based on indoor temperature and humidity, inferred or measured
outdoor temperature, and the dial setting. The control allows for variations in furnace
size, window insulation and average daily climate temperature.

The Automatic Humidity Control requires an initial adjustment period. Set the frost
factor dial on 5 and use the following table to adjust the frost factor—only one setting
at a time—increasing the dial setting if you feel you need more humidity, or reducing
the setting if you see moisture on the inside of your windows. For more precise
humidity adjustment, set the frost factor between dial settings. Allow two days for the
humidity level to subside before making further adjustments. Once you have tuned in
the proper setting, you should never have to adjust it again. The control takes over and
makes any future adjustments caused by varying outdoor temperatures, thus reducing
moisture buildup on windows while maintaining the optimal humidity level.

Humidity Level Recommended Adjustment

Insufficient humidity Increase the frost factor dial by one setting.

Condensation on windows Decrease the frost factor dial by one setting.

The Automatic Humidity Control can also be set for manual operation. Once the
control is installed in the cold air return and internally set to MANUAL, turn the dial to
the expected outdoor temperature. The corresponding optimal humidity level has been
calibrated for you. For example, by setting the dial to an anticipated 20°F, the control
automatically maintains the indoor relative humidity in the safe, comfortable 35%
range (see table below).

Outside Temperature Recommended RH

+40°F 45%

+30°F 40%

+20°F 35%

+10°F 30%

0°F 25%

-10°F 20%

-20°F 15%

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