Honeywell Humidifier HCM-750 Manual

The Honeywell HCM-750 is a cool mist humidifier designed to add comfortable moisture to dry air in medium to large rooms. It features a 1.5-gallon tank, adjustable humidity control, an easy-to-clean design, a refill indicator light, a quiet operation mode, and an automatic shut-off when empty. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Water Tank, Base Unit with Motor and Fan, Humidistat Control Knob, Refill Indicator Light, Mist Outlet, and Demineralization Cartridge (if included).

Installation & Setup

Unpack and inspect all parts. Place on a stable, level, waterproof surface away from electronics and direct sunlight.

1. Remove tank: Lift tank off base unit.
2. Fill tank: Turn upside down, remove cap, fill with cool, clean water. Replace cap securely.
3. Replace tank: Place tank back onto base, ensuring it sits firmly.
4. Position unit: Place at least 12 inches from walls and on a waterproof mat or tray if desired.
5. Plug in: Connect power cord to a standard 120V outlet.

WARNING! Use only clean, cool water. Do not use hot water or additives. Ensure unit is on a flat surface to prevent tipping.

First-Time Use

After setup, turn the humidistat control knob to the desired setting.

1. Power on: Plug in unit. The refill light may illuminate if tank is empty.
2. Set humidity: Turn knob clockwise to increase mist output (higher humidity) or counterclockwise to decrease.
3. Adjust mist outlet: Direct the mist away from walls, furniture, and electronics.
4. Monitor: The refill light will turn on when the tank is empty, indicating it's time to refill.

CAUTION! Never operate without water. Do not block mist outlet. Keep out of reach of children.

Specifications

• Model: HCM-750
• Tank Capacity: 1.5 Gallons (5.7 Liters)
• Room Coverage: Up to 750 square feet (medium to large rooms)
• Run Time: Up to 24 hours on low setting
• Output: Up to 1.8 gallons per day
• Humidistat: Manual adjustable control
• Power: 120V AC, 60Hz
• Noise Level: Quiet operation
• Dimensions (approx.): 12.5" H x 10.5" W x 10.5" D
• Weight (empty): 5.5 lbs

Controls and Operation

Primary control is the humidistat knob on the base unit.

Knob Positions: Turn fully counterclockwise to OFF. Turn clockwise to increase mist output. The further clockwise, the higher the humidity output.

Indicator Light: The refill light (usually blue or green) illuminates when the water tank is empty or nearly empty. It turns off when the tank is refilled and properly seated.

Automatic Shut-Off: The unit will automatically power off when the tank is empty to protect the motor.

Mist Outlet: Can be rotated to direct cool mist where needed.

Maintenance & Cleaning

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

1. Daily: Wipe exterior with a damp cloth.
2. Weekly: Empty any remaining water. Clean tank and base with a mixture of mild soap and water. Rinse thoroughly.
3. Monthly/As needed: Descale using a solution of 1 cup white vinegar and 1 gallon water. Let sit for 20 minutes, scrub, then rinse multiple times to remove vinegar smell.
4. Dry all parts completely before reassembly.

Tip: Use distilled or demineralized water to reduce white dust and cleaning frequency.

Water Tank Refilling

1. Unplug the unit.
2. Lift the water tank off the base by the handle.
3. Turn tank upside down and unscrew the cap.
4. Fill with cool, clean tap, distilled, or demineralized water up to the fill line.
5. Securely replace the cap.
6. Place tank back onto base, ensuring it is seated correctly.
7. Plug in unit. The refill light should turn off.

WARNING! Do not overfill. Do not immerse base unit in water. Always refill over a sink.

Filter Information

Some HCM-750 models may include or recommend a demineralization cartridge (filter).

Purpose: Reduces white mineral dust (calcium, lime) emitted in the mist.

Replacement: If your model uses a cartridge, replace it every 30-60 days or as indicated by reduced performance or visible scaling.

Installation: Follow instructions included with the cartridge. Typically placed inside the tank or base.

Note: Using distilled water may extend filter life or eliminate the need for one.

Care & Storage

When not in use for extended periods:

1. Unplug unit.
2. Empty and thoroughly clean all parts (tank, base).
3. Allow all parts to dry completely.
4. Reassemble and store in original box or a dry place.
5. Do not store with water in the tank.

CAUTION! Never store while wet, as this promotes mold and mildew growth.

Regulatory Information

This humidifier complies with relevant safety standards. It is a Class B digital device that may not cause harmful interference. Copyright and trademarks are property of Honeywell International Inc. For support, replacement parts, or filters, visit www.honeywellpluggedin.com or contact Honeywell Customer Care at 1-800-332-1110.

Troubleshooting

Reset: Unplug for 5 minutes, then restart.

Service: For issues not resolved above, contact Honeywell Customer Care: 1-800-332-1110 or www.honeywellpluggedin.com.