Levoit Humidifier LUH-D301S-KEUR Manual

The Levoit LUH-D301S-KEUR is a 3-liter ultrasonic cool mist humidifier featuring a 360° nozzle, adjustable mist output, quiet operation, auto shut-off, night light, essential oil tray, and easy-to-clean design. Ideal for bedrooms, offices, and small living spaces. 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. Cleaning & Maintenance 8. Safety Features 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: 3-liter water tank, ultrasonic mist generator, 360° adjustable nozzle, control panel with LED indicators, essential oil tray, and removable base for cleaning.

Feature	Description
Water Tank Capacity	3 liters (0.8 gallons)
Mist Output	Adjustable from low to high (up to 300 mL/h)
Run Time	Up to 10 hours on low setting
Noise Level	< 30 dB (quiet operation)
360° Nozzle	Adjustable mist direction
Auto Shut-Off	Activates when water level is low or tank is removed
Night Light	Soft blue LED with on/off option
Essential Oil Tray	For adding aromatherapy oils (use only water-soluble oils)
Filter-Free	No replacement filters required
Power Source	120V AC, 60Hz, 24W

Installation & Setup

Unpack and inspect contents. Place on a flat, stable, water-resistant surface away from electronics.

Remove all packaging materials from humidifier and accessories.
Place the unit on a level surface at least 12 inches away from walls and furniture.
Fill the water tank: Remove tank from base, flip upside down, unscrew cap, fill with cool tap water (do not exceed max line), replace cap securely.
Reattach tank to base, ensuring it sits firmly.
Plug power adapter into humidifier DC jack, then into a 120V wall outlet.

WARNING! Do not use with damaged cord or plug. Do not place under shelves or in enclosed spaces where moisture may accumulate.

First-Time Use

Power on humidifier; adjust settings as needed.

Press POWER button to turn on; default mist setting is low.
Adjust mist output: Press MIST button to cycle through low, medium, high settings.
Set night light: Press LIGHT button to turn on/off the blue LED night light.
Use essential oils: Add a few drops to the dedicated tray (not directly into water tank).
Auto shut-off: Unit will automatically power off when water tank is empty or removed.

CAUTION! Use only clean, cool tap water. Do not use hot water, distilled water with additives, or essential oils directly in tank.

Specifications

Model: LUH-D301S-KEUR
Tank Capacity: 3 L (0.8 gal)
Coverage Area: Up to 250 sq ft
Mist Output: 300 mL/h max
Run Time: 10 hours (low), 6 hours (high)
Noise Level: < 30 dB
Power Consumption: 24W
Power Supply: 120V AC, 60Hz
Dimensions: 8.7" x 8.7" x 11.4"
Weight: 3.3 lbs (empty)
Water Level Indicator: Visible tank gauge
Warranty: 2-year limited warranty

Controls and Operation

Control Panel: POWER button, MIST adjustment (Low/Med/High), LIGHT button (night light on/off).

Operation Tips:

Adjust 360° nozzle to direct mist away from walls and electronics.
For best performance, place humidifier in center of room on a raised surface.
Refill tank when water level is near minimum line.
Use in environments with 30-60% relative humidity for comfort.

Indicator Lights: Blue power LED (steady when on, off when auto shut-off activates).

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 the essential oil tray located near the nozzle.
Add 3-5 drops of water-soluble essential oil to the tray.
Slide tray back into place.
Operate humidifier as normal; mist will carry aroma.

WARNING! Use only pure, water-soluble essential oils. Do not use thick or synthetic oils, which can damage the ultrasonic plate. Clean tray after each use.

Cleaning & Maintenance

Regular cleaning prevents mold and mineral buildup. Unplug before cleaning.

Daily: Empty and rinse tank with fresh water.
Weekly: Deep clean tank and base with white vinegar solution (1 cup vinegar to 1 gallon water). Soak for 20 minutes, scrub with soft brush, rinse thoroughly.
Monthly: Clean ultrasonic plate with vinegar-dampened cotton swab; do not scratch.
Dry all parts completely before reassembly.

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

Safety Features

Auto Shut-Off: Activates when water tank is empty or removed, preventing dry operation. Tip-Over Protection: Unit powers off if knocked over. Overheat Protection: Internal sensor shuts off unit if overheating detected.

Regulatory Information

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

Troubleshooting

Symptom	Possible Cause	Corrective Action
No mist output	Low water, clogged nozzle	Refill tank; clean nozzle with vinegar solution; ensure tank is seated properly.
Weak mist	Mineral buildup on ultrasonic plate	Clean plate with vinegar and soft cloth; use filtered water if hard water area.
Unit not powering on	No power, auto shut-off active	Check outlet and power adapter; ensure tank has water and is correctly attached.
Water leakage	Loose cap, cracked tank, overfilling	Tighten tank cap; inspect for cracks; do not fill above MAX line.
Unusual noise	Vibration from uneven surface, debris in water	Place on level surface; empty and rinse tank; check for foreign objects.
Night light not working	LED disabled, power issue	Press LIGHT button to enable; check power connection.

Reset: Unplug for 5 minutes, then restart.

Service: 1-888-726-8520; [email protected]; www.levoit.com