Honeywell Humidifier HCM-890MTG Manual

The Honeywell HCM-890MTG is a 2-gallon ultrasonic cool mist humidifier designed for medium to large rooms. It features a top-fill design, adjustable mist output control, a built-in essential oil tray, a 360-degree mist nozzle, an auto-shutoff function when empty, a night light, and a filter-free operation. Powered by 120V AC, 60Hz. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Water tank with handle, Humidifier base with control panel, 360-degree mist nozzle, Essential oil tray, Power adapter.

Installation & Setup

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

1. Remove all packaging materials from the humidifier and tank.
2. Place the humidifier base on a flat, stable surface at least 12 inches from walls.
3. Fill the water tank: Carry tank to sink, remove cap, fill with cool tap water, replace cap securely.
4. Place tank on base: Align tank with base and set down gently until it clicks into place.
5. Plug power adapter into the humidifier base and then into a standard 120V AC outlet.

WARNING! Do not use with extension cords. Ensure hands are dry when handling the unit or plug.

First-Time Use

Power on the humidifier; adjust settings as needed.

1. Turn the mist control knob to the desired setting (Low, Medium, High).
2. Rotate the 360-degree nozzle to direct mist away from walls and furniture.
3. Press the Night Light button to turn the light on or off as preferred.
4. Allow the unit to run for a few minutes; visible mist should appear from the nozzle.
5. For essential oils: Add a few drops to the designated tray only (not into the water tank).

CAUTION! Use only clean, cool tap water. Do not use hot water or add medications directly to the water tank.

Specifications

• Model: HCM-890MTG
• Tank Capacity: 2 gallons (7.6 liters)
• Coverage Area: Up to 500 square feet
• Run Time: Up to 24 hours on low setting
• Mist Output: Adjustable, up to 300 mL/hour
• Technology: Ultrasonic cool mist
• Power Source: 120V AC, 60Hz, 24W
• Noise Level: Less than 30 dB
• Dimensions: 11.8" x 11.8" x 13.4"
• Weight: 5.5 lbs (empty)
• Operating Temp: 41°F to 104°F (5°C to 40°C)

Controls and Settings

Control Panel located on the front of the humidifier base.

Mist Control Knob: Turn clockwise to increase mist output (Low → Medium → High). Turn counter-clockwise to decrease or turn off.

Night Light Button: Press once to turn on soft blue LED light. Press again to turn off.

Power Indicator: Blue LED illuminates when unit is plugged in and operational.

Essential Oil Tray: Slide-out tray located near the control panel for adding oils.

360-Degree Nozzle: Rotate manually to direct mist output in any direction.

Operation Guide

Daily operation and best practices for optimal performance.

1. Ensure the water tank is filled and properly seated on the base.
2. Plug in the power adapter. The power indicator will light up.
3. Turn the Mist Control Knob to your desired setting. Mist should appear within 1-2 minutes.
4. Adjust the 360-degree nozzle to direct mist away from direct contact with walls, furniture, or electronics.
5. Use the Night Light as desired for nighttime operation.
6. When the tank is empty, the unit will automatically shut off. Refill the tank to resume operation.
7. To turn off, rotate the Mist Control Knob fully counter-clockwise to the "OFF" position, then unplug.

Tip: For best results, place the humidifier on a waterproof mat or towel in case of condensation.

Maintenance & Cleaning

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

1. Unplug the unit and remove the water tank from the base.
2. Empty any remaining water from the tank and base.
3. Clean the tank: Fill with a mixture of 1 cup white vinegar and 1 gallon water. Let sit for 20 minutes, then scrub interior with a soft brush. Rinse thoroughly with clean water.
4. Clean the base: Wipe the base reservoir and ultrasonic plate with a cloth dampened with the vinegar solution. Do not submerge the base in water.
5. Clean the exterior: Wipe the outside of the unit and tank with a damp cloth. Dry completely.
6. Reassemble: Ensure all parts are completely dry before reassembling and using.

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

Using Essential Oils

The built-in essential oil tray allows for aromatherapy. Use only 100% pure, water-soluble essential oils.

1. Ensure the humidifier is turned off and unplugged.
2. Pull out the essential oil tray located on the front of the unit.
3. Add 3-5 drops of essential oil directly onto the tray pad. Do not overfill.
4. Slide the tray back into its slot securely.
5. Operate the humidifier as normal. The mist will carry the scent.
6. Clean the oil tray regularly with a cotton swab and rubbing alcohol to prevent clogging.

CAUTION! Never add oils directly to the water tank. This can damage the ultrasonic plate and void the warranty.

Care & Storage

When not in use for extended periods, prepare the humidifier for storage.

1. Unplug the unit and empty all water from the tank and base.
2. Clean all parts thoroughly as described in the Maintenance section. Allow to air dry completely.
3. Remove the essential oil tray and clean it separately.
4. Store the unit in its original box or a clean, dry place away from dust and direct sunlight.
5. Do not store with any water remaining in the tank or base to prevent mold growth.

Tip: Keep the power adapter with the unit during storage.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. This device complies with part 18 of the FCC Rules. Copyright © 2023 Honeywell International Inc. Honeywell and the Honeywell Home logo are trademarks of Honeywell International Inc. For support, visit www.honeywellhome.com or contact 1-800-332-1110.

Troubleshooting

Reset: Unplug unit for 2 minutes, then plug back in.

Service: 1-800-332-1110; www.honeywellhome.com