Honeywell Humidifier HCM-550 Series Manual

The Honeywell HCM-550 Series is a cool mist humidifier designed for medium to large rooms, featuring a 1.5-gallon tank capacity, adjustable humidity control, quiet operation, and an easy-to-clean design. It includes a demineralization cartridge to reduce white dust, an antimicrobial-treated filter, a refill indicator light, and an auto-shutoff function when empty. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Water tank with handle, Base unit with control panel, Demineralization cartridge, Wick filter, Refill indicator light, Humidity control dial.

Installation

Unpack and inspect contents. Place on level, stable surface away from walls and furniture.

1. Remove all packaging materials from tank and base.
2. Install the wick filter: Remove from packaging and insert into base slot.
3. Install demineralization cartridge: Place into designated holder in base.
4. Fill water tank: Remove tank from base, invert, unscrew cap, fill with cool tap water, replace cap securely.
5. Place tank on base: Align tank with base and set down gently.

WARNING! Use only cool tap water. Do not use hot water, additives, or essential oils. Ensure unit is on a flat, waterproof surface.

First-Time Setup

Plug into standard 120V AC outlet; adjust settings.

1. Power on: Plug unit into electrical outlet. The refill light may illuminate if tank is empty.
2. Fill tank: Follow installation steps to fill tank completely.
3. Set humidity level: Turn control dial to desired setting (Low to High).
4. Allow operation: Unit will begin producing mist within a few minutes.
5. Monitor performance: Check room humidity and adjust dial as needed.

CAUTION! Do not operate without water. Keep unit upright at all times.

Specifications

• Model Series: HCM-550 (includes HCM-550, HCM-550W, HCM-550B).
• Tank Capacity: 1.5 gallons (5.7 liters).
• Room Coverage: Up to 2300 sq ft (medium to large rooms).
• Output: Up to 2.3 gallons per day (maximum setting).
• Controls: Adjustable humidity dial, refill indicator light.
• Filter Type: Antimicrobial wick filter (replace every 1-3 months).
• Special Features: Demineralization cartridge, auto shut-off, quiet fan.
• Power Source: 120V AC, 60Hz.
• Dimensions: Approximately 17.5" H x 13.5" W x 10.5" D.
• Weight (empty): 7.5 lbs.

Controls and Settings

Control Panel: Humidity control dial (continuously variable from Low to High), Refill indicator light (red).

Operation: Turn dial clockwise to increase mist output and humidity level. Turn counterclockwise to decrease. The refill light illuminates when water level is low and unit will auto-shutoff.

Optimal Settings: For bedrooms, set to medium-low for quiet operation. For dry environments, use higher settings. Adjust based on room size and desired comfort level.

Filling and Operation

Daily operation and refilling procedures.

1. Check water level: Observe tank or refill light.
2. Refill when empty: Unplug unit, remove tank, invert, unscrew cap, fill with cool tap water, replace cap, reposition on base.
3. Adjust humidity: Turn dial to desired setting.
4. Monitor performance: Mist should be visible; room humidity should increase.
5. Auto shut-off: Unit will turn off when tank is empty; refill to resume.

Tip: Use distilled water if white dust is a concern, though demineralization cartridge reduces this.

Maintenance and Cleaning

Regular cleaning prevents mold and mineral buildup.

1. Unplug unit before cleaning.
2. Empty tank completely.
3. Clean tank: Use mild soap and water; rinse thoroughly.
4. Clean base: Wipe with damp cloth; do not immerse in water.
5. Descale if needed: Use vinegar solution (1 part vinegar to 3 parts water) for mineral deposits; rinse well.
6. Dry completely before reassembly.

Frequency: Clean every 1-2 weeks during use; more often in hard water areas.

Filter Replacement

Replace wick filter regularly for optimal performance.

1. Order replacement filter: Use genuine Honeywell HCM-550 series filter.
2. Unplug unit and empty water.
3. Remove old filter: Pull from base slot.
4. Insert new filter: Place into slot, ensuring it sits flat.
5. Reset filter indicator (if applicable): Some models have filter change light.

Replacement Interval: Every 1-3 months depending on water hardness and usage. Demineralization cartridge: Replace every 2-3 months.

Care & Storage

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

1. Unplug unit.
2. Empty and dry tank and base completely.
3. Remove and discard old filter.
4. Clean all parts as described.
5. Store in original packaging or dry location.
6. Do not store with water in tank.

CAUTION! Never store with water inside to prevent mold and bacterial growth.

Regulatory Information

UL Listed: Meets safety standards for household humidifiers. FCC Part 15: Class B digital device; complies with interference limits. Copyright © Honeywell International Inc. For support, visit www.honeywellhumidifiers.com or contact 1-800-332-1110. This product is covered by a limited warranty; see packaging for details.

Troubleshooting

Reset: Unplug for 5 minutes, then restart.

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