Levoit Humidifier LUH-D302-BUS Manual

The Levoit LUH-D302-BUS is a 3.5L ultrasonic cool mist humidifier designed for medium to large rooms. It features a 360° nozzle, adjustable mist output, optional night light, auto shut-off, and quiet operation. 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 Settings 6. Operating Modes 7. Maintenance & Cleaning 8. Safety Features 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: 3.5L water tank, ultrasonic mist generator, 360° adjustable nozzle, control panel, night light, filter (if applicable).

Feature	Description
Water Tank Capacity	3.5 Liters
Mist Output	Adjustable from low to high
Nozzle	360° rotatable for directional mist control
Operation Time	Up to 25 hours on low setting
Night Light	Optional soft blue light, can be turned off
Auto Shut-Off	Activates when water tank is empty
Quiet Operation	Ultra-quiet for bedroom or office use
Control Panel	Touch buttons for power, mist level, timer, night light
Filter	Optional demineralization filter (sold separately)
Power Source	120V AC, 60Hz

Installation & Setup

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

Remove all packaging materials from the humidifier and water tank.
Place the humidifier base on a flat, level surface at least 12 inches away from walls.
Fill the water tank with clean, cool tap water. Do not use hot water.
If using the optional demineralization filter, install it according to the included filter instructions.
Place the filled water tank onto the base, ensuring it is seated properly.

WARNING! Do not place on carpets or uneven surfaces. Keep away from heat sources and direct sunlight.

First-Time Use

Power on the humidifier; follow initial setup steps.

Plug the power cord into a standard 120V AC outlet.
Press the POWER button to turn on the humidifier.
Adjust the mist output using the MIST LEVEL button (Low, Medium, High).
Rotate the 360° nozzle to direct the mist as desired.
To use the night light, press the LIGHT button. Press again to turn it off.
Set the timer (1-12 hours) using the TIMER button if desired.

CAUTION! Use only clean, cool water. Do not add essential oils or other additives unless specified as compatible.

Specifications

Model: LUH-D302-BUS
Tank Capacity: 3.5 Liters (0.92 Gallons)
Room Coverage: Up to 250 sq ft
Run Time: Up to 25 hours (Low), 12 hours (High)
Mist Output: Adjustable, up to 300 mL/hr
Noise Level: < 30 dB
Power Consumption: 25W
Power Source: 120V AC, 60Hz
Product Dimensions: 9.5" x 9.5" x 12.6"
Weight: 4.2 lbs (empty)

Controls and Settings

Access all functions via the touch control panel on the top of the unit.

Control Panel Buttons: POWER, MIST LEVEL (cycles Low/Med/High), TIMER (1-12 hrs, Off), LIGHT (On/Off).

Indicator Lights: Power LED (Blue), Mist Level LEDs (Green), Timer LED (Orange), Low Water Indicator (Red).

Basic Settings: Mist Output (adjust for desired humidity level), Timer (set automatic shut-off), Night Light (optional ambiance).

Operating Modes

Standard, Sleep, and Continuous modes for different needs.

Standard Mode: Adjust mist level manually. Use for daily humidity control.
Sleep Mode: Set timer for 1-12 hours. All lights will turn off except the power indicator (dimmed).
Continuous Mode: Set mist to High and timer to Off for uninterrupted operation until tank is empty.

Tip: For best results, keep doors and windows closed in the room where the humidifier is operating.

Maintenance & Cleaning

Regular cleaning is essential for performance and to prevent mold or bacteria growth.

Daily: Empty and rinse the water tank if not in use for more than 24 hours.
Weekly: Clean the tank and base with a soft cloth and a mixture of white vinegar and water (1:1 ratio). Rinse thoroughly.
Monthly: Deep clean the ultrasonic disc (metal plate at base of water reservoir) with the provided cleaning brush or a soft toothbrush.
Filter Care: If using the demineralization filter, replace it every 1-2 months or as indicated.

CAUTION! Always unplug the unit before cleaning. Never immerse the base in water. Do not use abrasive cleaners.

Safety Features

Auto Shut-Off: Automatically powers off when water tank is empty or removed. Tip-Over Protection: Internal sensor shuts off unit if tilted. Low Water Indicator: Red LED lights up when water level is low.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. ETL Listed. Copyright © Levoit. For support, visit www.levoit.com or contact customer service at 1-888-726-8520.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No mist output	Empty tank, low water, clogged nozzle	Fill tank with water. Clean the nozzle opening. Ensure tank is seated correctly.
Unit not powering on	No power, loose plug	Check that the unit is plugged in. Try a different outlet.
White dust around unit	Minerals in hard water	Use distilled water or install a demineralization filter.
Water leaking	Tank not seated, overfilled, damaged seal	Ensure tank is properly placed. Do not overfill. Check tank and base seals for damage.
Unusual noise	Low water, debris in tank	Fill the water tank. Clean the tank and ultrasonic disc.
Night light not working	Light is turned off, LED failure	Press the LIGHT button to turn it on. If LED fails, contact support.

Reset: Unplug the unit for 60 seconds, then plug back in.

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