Levoit Humidifier LUH-D302-WUS Manual

The Levoit LUH-D302-WUS is a 3-liter cool mist humidifier with ultrasonic technology, 360° nozzle, optional night light, auto shut-off, and quiet operation. It features a top-fill design, essential oil tray, adjustable mist output, and a 1-12 hour timer. Ideal for bedrooms, offices, and small to medium rooms. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation & Setup 3. First-Time Use 4. Specifications 5. Controls and Operation 6. Using Essential Oils 7. Maintenance & Cleaning 8. Safety Features 9. Care & Storage 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Water tank, base with ultrasonic module, control panel, 360° mist nozzle, night light, essential oil tray.

Feature	Description
Water Tank Capacity	3 liters (0.8 gallons)
Mist Output	Adjustable up to 300 mL/h
Run Time	Up to 25 hours on low setting
Noise Level	< 30 dB (Quiet operation)
Timer	1-12 hours programmable
Night Light	LED with on/off option
Essential Oil Tray	For aromatherapy use
Auto Shut-Off	Activates when water is low or tank is removed
Power	120V AC, 60Hz, 24W
Control Panel	Touch buttons for mist, timer, light, power

Installation & Setup

Unpack and inspect all parts. Place on a flat, stable, and dry surface.

Remove tank: Lift water tank from base.
Fill tank: Turn upside down, unscrew cap, fill with cool tap water (do not exceed MAX line).
Reassemble: Screw cap tightly, place tank back on base.
Power: Plug into a standard 120V AC outlet.

WARNING! Use only clean, cool tap water. Do not use hot water or additives directly into tank. Keep away from children.

First-Time Use

Power on the humidifier; follow initial setup steps.

Initial fill: Fill tank completely as per installation steps.
Power on: Press POWER button; unit will beep and mist will start on default low setting.
Adjust mist: Press MIST button to cycle through low, medium, high output.
Set timer: Press TIMER to set 1-12 hours; unit will auto shut-off after set time.
Night light: Press LIGHT to turn LED on/off.

CAUTION! Ensure unit is on a level surface away from walls and electronics. Do not block mist nozzle.

Specifications

Model: LUH-D302-WUS
Type: Ultrasonic Cool Mist Humidifier
Tank Capacity: 3 L (0.8 gal)
Coverage Area: Up to 250 sq ft
Mist Output: Adjustable, up to 300 mL/h
Operating Time: 10-25 hours (depends on setting)
Noise Level: < 30 dB
Power Consumption: 24W
Power Supply: 120V AC, 60Hz
Dimensions: 9.8" x 7.5" x 10.2"
Weight: 3.3 lbs (empty)

Controls and Operation

Control Panel (Touch Buttons): POWER, MIST (Low/Med/High), TIMER (1-12H), LIGHT (Night Light).

Operation: Press POWER to turn on/off. MIST cycles through output levels (indicator lights: Blue-Low, Green-Med, Red-High). TIMER sets auto-off (1-12 hours, each press increases by 1 hour). LIGHT toggles night light on/off.

Nozzle: Rotate 360° to direct mist. Auto Shut-Off: Red light flashes and unit beeps when water is low; stops misting. Refill tank to resume.

Using Essential Oils

Only use the provided essential oil tray. Do not add oils directly to water tank.

Ensure humidifier is off and unplugged.
Pull out essential oil tray located near nozzle.
Add 2-3 drops of pure essential oil onto the cotton pad in tray.
Slide tray back into slot.
Operate humidifier as normal; mist will carry aroma.

Tip: Clean tray regularly to prevent oil buildup. Use only pure, water-soluble essential oils.

Maintenance & Cleaning

Regular cleaning prevents mold and mineral buildup. Clean every 1-2 weeks with daily use.

Unplug and empty tank.
Clean tank: Add 2 cups white vinegar and swirl; soak 15-20 minutes, then scrub with soft brush. Rinse thoroughly.
Clean base: Wipe with cloth dampened with vinegar/water mix. Do not submerge base.
Dry all parts completely before reassembly.
Descale: For hard water areas, use citric acid or manufacturer's descaling solution monthly.

WARNING! Never use abrasive cleaners, bleach, or detergents. Do not immerse base in water.

Safety Features

Auto Shut-Off: Activates when water level is low or tank is removed. Overheat Protection: Built-in sensor prevents overheating. Tip-Over Protection: Unit stops if knocked over. BPA-Free Materials: All water-contact parts are BPA-free.

Care & Storage

When not in use for extended periods:

Unplug and empty all water.
Clean thoroughly as per maintenance section.
Dry all parts completely.
Reassemble and store in original box in a cool, dry place.

CAUTION! Do not store with water inside to prevent mold or damage.

Regulatory Information

Troubleshooting

Symptom	Possible Cause	Corrective Action
No mist output	Low water, clogged nozzle	Refill tank; clean nozzle with soft brush; ensure power is on.
Red light flashing	Water empty or tank not seated	Refill tank; ensure tank is properly placed on base.
Unit not turning on	No power, not plugged in	Check outlet; ensure plug is secure; try different outlet.
White dust around unit	Hard water minerals	Use distilled water; clean with vinegar descaling.
Unusual noise	Vibration, water level low	Place on level surface; refill water tank.
Mist output weak	Mineral buildup, filter dirty	Clean tank and nozzle; check and replace filter if applicable.

Reset: Unplug for 5 minutes, then restart. Service: 1-888-726-8520; www.levoit.com