Honeywell Humidifier HWM331 - 3 Gl. QuickSteam Warm Mist Manual

The Honeywell HWM331 QuickSteam Warm Mist Humidifier is a 3-gallon capacity humidifier designed to add moisture to dry indoor air. It features a warm mist output, adjustable humidistat, easy-to-clean design, auto shut-off when empty, medicine cup for inhalants, and quiet operation. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 3-gallon water tank, heating chamber, humidistat control, power base, medicine cup, and indicator lights.

Installation & Setup

Unpack and inspect all parts. Place on a stable, level surface away from walls and furniture.

1. Remove all packaging materials from inside and outside the unit.
2. Place humidifier on a flat, waterproof surface (like a floor or table).
3. Ensure the unit is at least 12 inches away from walls and furniture for proper mist dispersion.
4. Keep out of reach of children and pets.

WARNING! Use only on a stable, level surface. Do not place on carpets or near heat sources. Ensure power cord is not pinched or damaged.

First-Time Use

Before first use, clean the tank and base as described in the Cleaning section.

1. Fill the water tank with cool, clean tap water. Do not use hot water.
2. Place tank securely onto the power base.
3. Plug the power cord into a standard 120V AC outlet.
4. Turn the humidistat dial to the desired setting (Low to High).
5. The power light will illuminate, and warm mist will begin to emit after a short warm-up period.

CAUTION! Never operate without water. Always use clean, cool water. Do not add water directly to the base.

Specifications

• Model: HWM331
• Type: Warm Mist Humidifier
• Tank Capacity: 3 Gallons (11.4 Liters)
• Room Coverage: Up to 600 sq. ft.
• Run Time: Up to 24 hours on low setting
• Output: Adjustable warm mist
• Controls: Manual humidistat dial
• Power: 120V AC, 60Hz
• Power Consumption: 280 Watts (max)
• Dimensions (approx.): 13.5" H x 10.5" W x 10" D
• Weight (empty): 6.5 lbs

Controls and Operation

Primary control is the humidistat dial on the front of the unit.

Operation: Turn dial clockwise to increase mist output (HIGH) and counter-clockwise to decrease (LOW). The unit will run continuously until the tank is empty or turned off.

Indicator Lights: Green Power Light (on when plugged in and operational). Red Low Water Light (illuminates when tank is nearly empty; unit will shut off shortly after).

To Turn Off: Turn humidistat dial fully counter-clockwise to the "OFF" position, or unplug the unit from the outlet.

Filling & Water Care

Always fill the removable tank, not the base.

1. Turn the humidistat to OFF and unplug the unit.
2. Lift the water tank off the base using the carry handle.
3. Carry tank to a sink. Turn it upside down and unscrew the cap on the bottom.
4. Fill with cool, clean tap water. Do not exceed the "MAX FILL" line.
5. Replace the cap securely and wipe any spilled water from the tank.
6. Return tank to the base, ensuring it is seated properly.
7. Plug in the unit and turn the dial to desired setting.

Tip: Use distilled or demineralized water to minimize white dust (mineral deposits) if your tap water is hard.

Cleaning & Maintenance

Regular cleaning prevents mineral buildup and microbial growth.

Daily: Empty and rinse the tank if not in continuous use.

Weekly Cleaning:

1. Unplug unit. Remove tank and empty any remaining water.
2. Clean tank interior with a mild detergent and soft brush. Rinse thoroughly.
3. Wipe the exterior of the base with a damp cloth. Do not immerse base in water.
4. Allow all parts to air dry completely before reassembling.

Descaling (Monthly or as needed): To remove mineral deposits, fill tank with a mixture of 1 cup white vinegar and 1 gallon water. Let sit for 20 minutes, scrub, then rinse thoroughly with clean water.

CAUTION! Never use abrasive cleaners, bleach, or solvents. Do not immerse the power base in water. Unplug before cleaning.

Using the Medicine Cup

The optional medicine cup is for use with inhalants or essential oils.

1. Ensure the humidifier is off and unplugged.
2. Locate the medicine cup slot on the mist outlet or base (refer to diagram on unit).
3. Add a few drops of liquid inhalant or essential oil to the cup. Do not exceed the fill line.
4. Insert the cup into its slot.
5. Operate the humidifier as normal. The warm mist will carry the vapor into the air.

WARNING! Use only products designed for humidifiers or vaporizers. Do not add medicine or oils directly to the water tank. Clean the cup after each use.

Safety Features

Auto Shut-Off: Turns off heating element when water level is too low, preventing damage or fire hazard.

Cool-Touch Exterior: Designed to remain cool during operation.

Tip-Over Protection: Internal safety switch may interrupt power if unit is tipped over.

Important Safety Instructions: Always use on a stable, level surface. Use only 120V outlet. Do not operate with a damaged cord or plug. Do not cover mist outlet. Unplug when not in use for extended periods or while cleaning.

Regulatory Information

This humidifier complies with relevant U.S. safety standards. Copyright and trademarks are property of Honeywell International Inc. For support, visit www.honeywellpluggedin.com or contact Honeywell Customer Care at 1-800-332-1110.

Troubleshooting

Reset: If unit stops unexpectedly, turn dial to OFF, unplug, wait 10 minutes, then refill tank and restart.

Service: For repairs, contact authorized service center. Do not attempt to disassemble the unit.