Levoit Humidifier LUH-D301S-BUS Manual

The Levoit LUH-D301S-BUS is a 3-liter ultrasonic cool mist humidifier designed for medium to large rooms. It features a 360° nozzle, adjustable mist output, optional night light, auto shut-off when water runs low or the tank is removed, and a quiet operation mode. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation & Setup 3. First-Time Use 4. Specifications 5. Controls and Settings 6. Operation Modes 7. Maintenance & Cleaning 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 touch buttons, night light, and filter (if included).

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 25 hours on low setting
Nozzle	360° rotatable for directional mist control
Night Light	Optional soft blue light, can be turned off
Auto Shut-Off	Activates when water is low or tank is removed
Quiet Operation	Ultra-quiet technology for night use
Filter	Demineralization filter (optional) to reduce white dust
Power Source	120V AC, 60Hz, 24W
Control Panel	Touch buttons for mist level, night light, timer

Installation & Setup

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

Remove all packaging materials from the humidifier and tank.
Install the filter (if included): Soak in cool water for 15 minutes, then insert into the base.
Fill the water tank: Remove tank, turn upside down, unscrew cap, fill with cool tap water (do not exceed max line).
Place tank on base: Align tank with base and press down gently until secure.
Plug into a 120V AC outlet.

WARNING! Use only clean, cool tap water. Do not use hot water, essential oils, or additives unless specified. Keep away from children and pets.

First-Time Use

Power on humidifier; adjust settings as needed.

Press the POWER button to turn on the unit.
Adjust mist output: Press MIST button to cycle through Low, Medium, High settings.
Set night light: Press LIGHT button to turn on/off or cycle through brightness levels.
Set timer (if available): Press TIMER to set auto shut-off after 1-12 hours.
Rotate nozzle to direct mist away from walls and furniture.

CAUTION! Ensure the unit is on a level surface to prevent leakage. Do not block mist outlet.

Specifications

Model: LUH-D301S-BUS
Tank Capacity: 3 liters (0.8 gallons)
Coverage Area: Up to 250 sq ft (medium to large room)
Mist Output: Adjustable, up to 300 mL/h
Run Time: 10-25 hours (depending on mist setting)
Noise Level: ≤ 30 dB (quiet mode)
Power Consumption: 24W
Power Supply: 120V AC, 60Hz
Dimensions: 9.5" x 9.5" x 11.8"
Weight: 4.2 lbs (empty)

Controls and Settings

Access controls via touch panel on the front of the unit.

Control Panel Buttons: POWER (On/Off), MIST (adjust output level: Low/Med/High), LIGHT (night light on/off/brightness), TIMER (set auto shut-off 1-12 hours).

Indicator Lights: Power (blue), Mist Level (LED indicators), Low Water (red light when tank is empty).

Settings: Mist output adjustable in three levels; Night light with optional brightness; Timer for automatic shut-off; Auto shut-off when water is low or tank removed.

Operation Modes

Normal Mode: Default operation with adjustable mist. Quiet/Sleep Mode: Automatically reduces noise and may lower mist output for nighttime. Timer Mode: Set shut-off after 1, 2, 4, 8, or 12 hours.

For continuous use: Set mist to desired level, ensure tank is full.
For night use: Enable quiet mode (if available), turn off night light if desired.
For timed operation: Set timer to desired duration; unit will beep and shut off automatically.

Tip: Use in a closed room for best humidity distribution. Keep doors and windows closed.

Maintenance & Cleaning

Regular cleaning prevents mold and mineral buildup.

Daily: Refill tank with fresh water; wipe exterior with dry cloth.
Weekly: Empty tank, clean with mild soap and water; rinse thoroughly.
Monthly: Descale if needed with white vinegar solution (1 part vinegar to 2 parts water). Soak tank and base for 20 minutes, then rinse.
Filter replacement: Replace demineralization filter every 1-2 months or as needed (part # LV600FH).

WARNING! Unplug before cleaning. Never immerse base in water. Dry all parts completely before reassembly.

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 shuts off if knocked over. Low Water Indicator: Red light alerts when tank is empty.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. ETL Listed: Meets safety standards. Copyright © 2023 Levoit; trademarks of Vesync Co., Ltd. For support, visit support.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 soft brush; ensure power is on.
White dust around unit	Hard water minerals	Use demineralization filter; use distilled water.
Unit not turning on	Power issue, auto shut-off	Check outlet; ensure tank is properly seated; reset by unplugging for 10 minutes.
Water leakage	Tank not sealed, overfilled	Ensure tank cap is tight; do not exceed max fill line; check for cracks.
Loud noise	Vibration, low water	Place on level surface; refill tank; check for debris in water.
Night light not working	Setting, bulb issue	Press LIGHT button to enable; if LED fails, contact support.

Reset: Unplug for 10 minutes, then restart.

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