Levoit Humidifier LUH-D302-MUS Manual

The Levoit Humidifier LUH-D302-MUS is a 2.5L ultrasonic cool mist humidifier designed for medium to large rooms. It features a 360° nozzle, adjustable mist output, optional night light, auto shut-off, quiet operation, and a built-in essential oil diffuser tray. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

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

Features at a Glance

Key components: 2.5L water tank, ultrasonic mist generator, 360° adjustable nozzle, control panel, night light, essential oil tray, power adapter.

Feature	Description
2.5L Water Tank	Large capacity for up to 25 hours of continuous use
Ultrasonic Technology	Produces fine cool mist without heating water
360° Nozzle	Adjustable direction for optimal mist distribution
Adjustable Mist Output	Three levels: Low, Medium, High
Night Light	Optional soft lighting with on/off control
Essential Oil Tray	Built-in tray for aromatherapy diffusion
Auto Shut-Off	Automatically turns off when water level is low or tank is removed
Quiet Operation	Ultra-quiet for bedroom or office use
Control Panel	Touch buttons for power, mist level, timer, and night light
Power Adapter	24V DC power supply included

Installation

Unpack and inspect contents. Place on stable, level surface away from walls and electronics.

Remove water tank: Lift tank from base unit.
Fill with water: Turn tank upside down, remove cap, fill with clean, cool tap water (do not exceed MAX line).
Replace cap: Ensure cap is tightly sealed.
Place tank on base: Align tank with base and set firmly in place.
Connect power: Plug power adapter into base unit and then into 120V AC outlet.

WARNING! Use only clean, cool tap water. Do not use hot water, distilled water with additives, or essential oils directly in tank. Place on waterproof surface.

First-Time Setup

Power on humidifier; adjust settings as needed.

Power on: Press POWER button on control panel.
Set mist level: Press MIST button to cycle through Low, Medium, High settings.
Adjust nozzle: Rotate 360° nozzle to direct mist away from walls and furniture.
Set timer (optional): Press TIMER to set auto-off duration (1-12 hours).
Night light: Press LIGHT button to turn night light on/off.

CAUTION! Ensure humidifier is on a flat, stable surface. Keep out of reach of children and pets.

Specifications

Model: LUH-D302-MUS
Tank Capacity: 2.5 liters (0.66 gallons)
Room Coverage: Up to 250 sq ft
Run Time: Up to 25 hours on Low setting
Mist Output: Up to 300 mL/hour
Noise Level: ≤ 30 dB
Power Input: 24V DC, 0.6A
Power Consumption: 15W
Dimensions: 9.0" x 9.0" x 11.5"
Weight: 3.3 lbs (empty)

Controls and Settings

Control Panel: POWER, MIST, TIMER, LIGHT buttons. Remote Control (if included): POWER, MIST, TIMER, LIGHT.

Power: Turns humidifier on/off. Mist: Cycles through Low, Medium, High output. Timer: Sets auto-off from 1 to 12 hours. Light: Toggles night light on/off.

Indicator Lights: Power (blue), Mist level (LED indicators), Low water (red light flashes when tank is empty).

Maintenance & Cleaning

Regular cleaning prevents mold and mineral buildup.

Unplug and empty: Turn off, unplug, and empty water tank.
Clean tank: Use mild detergent and soft brush; rinse thoroughly.
Clean base: Wipe base with damp cloth; use vinegar solution for descaling if needed.
Dry completely: Allow all parts to air dry before reassembly.
Replace water: Use fresh water daily for optimal performance.

Tip: Clean humidifier at least once a week; more often in hard water areas.

Using Essential Oils

Use only with built-in essential oil tray.

Ensure humidifier is off and unplugged.
Add oils: Place 3-5 drops of 100% pure essential oil into the dedicated tray (do not add oils directly to water tank).
Replace tray: Insert tray into slot on base unit.
Operate as normal: Mist will carry aroma into the air.

WARNING! Do not exceed recommended oil drops. Clean tray after each use to prevent clogging.

Safety Features

Auto Shut-Off: Turns off when water tank is empty or removed. Low Water Indicator: Red light flashes when water is low. Tip-Over Protection: Automatically shuts off if unit is knocked over.

Care & Storage

Unplug and empty before storage. Clean thoroughly and dry completely. Store in original box in cool, dry place.

CAUTION! Do not store with water in tank. Do not expose to extreme temperatures.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © 2023 Levoit; trademarks of Vesync Co., Ltd. For support, visit www.levoit.com or contact 1-888-726-8520.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No mist output	Empty tank/low water	Refill water tank; ensure tank is properly seated.
Weak mist	Mineral buildup	Clean tank and ultrasonic plate with vinegar solution.
Water leakage	Loose cap or overfilling	Tighten tank cap; do not exceed MAX fill line.
Unusual noise	Debris in water	Use filtered water; clean tank and base.
Night light not working	LED issue/settings	Press LIGHT button; ensure unit is powered on.
Unit won't turn on	Power connection	Check power adapter connection; try different outlet.

Reset: Unplug for 5 minutes, then restart.

Service: 1-888-726-8520; www.levoit.com