Homedics CMTF91 Ultrasonic Humidifier

Introduction

This document provides instructions for the Homedics CMTF91 Ultrasonic Humidifier. It covers setup, operation, safety precautions, cleaning, maintenance, troubleshooting, specifications, and warranty information.

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Important Safety Instructions

DANGER - TO REDUCE THE RISK OF ELECTRIC SHOCK:

• Always place humidifier on a firm, flat surface. A waterproof mat or pad is recommended. Never place on a rug, carpet, or finished floor that may be damaged by water or moisture.
• Always unplug the unit from the electrical outlet immediately after using and before cleaning.
• DO NOT reach for a unit that has fallen into water; unplug it immediately.
• DO NOT place or store the unit where it can fall or be pulled into a tub or sink.
• DO NOT place or drop into water or other liquids.
• DO NOT use water above 86°F (30°C).

WARNING - TO REDUCE THE RISK OF BURNS, FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS:

• Use this unit only for its intended use as described in this manual. Do not use attachments not recommended by Homedics.
• NEVER drop or insert any object into any opening.
• NEVER operate the appliance if it has a damaged cord or plug, if it is not working properly, if it has been dropped or damaged, or dropped into water. Return the appliance to a Homedics Service Center for examination and repair.
• Always unplug the unit when filling or moving the unit.
• Ensure that your hands are dry when operating the controls or removing the plug.
• DO NOT place the humidifier near heat sources, such as a stove, and do not expose the humidifier to direct sunlight.
• DO NOT carry this unit by the power cord or use the power cord as a handle.
• To disconnect, turn all controls to the off position, then remove the plug from the outlet.

CAUTION: All servicing of this humidifier must be performed by authorized Homedics service personnel only.

CAUTION - PLEASE READ ALL INSTRUCTIONS CAREFULLY BEFORE OPERATING:

• This product is intended for household use only.
• NEVER cover the unit while it is operating.
• Always keep the cord away from high temperatures and fire.
• Perform regular maintenance on the ultrasonic membrane.
• NEVER use detergent to clean the ultrasonic membrane.
• NEVER clean the ultrasonic membrane by scraping with a hard object.
• DO NOT attempt to adjust or repair the unit. Servicing must be performed by professional or qualified personnel.
• Stop using this unit if there is an unusual noise or smell.
• Unplug this unit when not in use for a long period of time.
• DO NOT touch the water or any parts of the unit that are covered by water while the unit is on or plugged in.
• NEVER operate without water in the tank.
• Only use water in the tank.
• NEVER use any additive in the water including essential oils.
• DO NOT wash, adjust, or move this unit without first unplugging it from the electrical outlet.
• Keep this unit out of reach of children. Do not allow children to use this unit without supervision.
• DO NOT use outdoors. For indoor use only.

CAUTION: DO NOT place a humidifier on furniture. Always use a waterproof mat or pad on wood floors.

Product Diagram and Components

The humidifier consists of several parts:

• 360° Rotating Mist Nozzle: Located at the top, directs mist output.
• Tank Cover: Covers the water tank.
• Water Tank: Holds the water.
• Demineralization Cartridge (1 pc): Reduces mineral deposits (white dust).
• Essential Oil Pads (3 pcs): For use with the aromatherapy tray.
• Float: Indicates water level.
• Water Reservoir: Base unit holding the transducer/ultrasonic membrane.
• Transducer/Ultrasonic Membrane: Vibrates to create mist. Accessible by twisting the water reservoir from the water tank.
• Control Panel: Located on the base, includes buttons and digital display.
• Power Plug: Connects the unit to an electrical outlet.
• Essential Oil Tray: Located at the base, for adding essential oils.

Control Panel Functions

The control panel features the following:

• Digital Display: Shows humidity level (e.g., 45%).
• Power Button (⏻): Turns the humidifier on/off.
• Mist Output Button (?): Adjusts mist output from 1 (low) to 3 (high).
• Night-Light/Display Lights Button (?): Controls the unit's lights.
• Programmable Humidistat Button (☁️): Sets desired humidity level (35%-55% in 5% increments). Unit turns off when level is reached and on when humidity drops 5% below. Set to 'CO' for continuous operation.
• Timer Button (⏱️): Sets auto-shutoff timer (4, 8, 12 hours, or 0 for off).
• Clean Reminder Indicator (?): Illuminates red when cleaning is needed.

Operation

How to Fill

CAUTION: Turn off and unplug the unit before filling.

NOTE: Use two hands to carry the water tank. The top-fill tank can be filled with a pitcher or at the faucet. For best results, use distilled water.

Using Demineralization Cartridges

The demineralization cartridge helps reduce white dust caused by hard water. Replace every 30-40 fillings, or more often with very hard water.

To Fill with a Pitcher:

1. Before first use, remove and soak cartridge in water for 10 minutes.
2. Remove tank cover.
3. Fill tank with clean, cool or distilled water to the MAX line. DO NOT use warm or hot water.
4. Add soaked cartridge to water tank.
5. Replace tank cover.

To Fill at the Faucet:

1. Before first use, remove and soak cartridge in water for 10 minutes.
2. Remove tank cover and water tank.
3. Fill tank with clean, cool or distilled water to the MAX line. DO NOT use warm or hot water.
4. Add soaked cartridge to water tank.
5. Reassemble, ensuring all parts are seated firmly.

About White Dust

White dust is mineral residue from hard water. It is not a defect but a result of minerals suspended in the water.

How to Use the Oil Tray

CAUTION: Only use the oil tray for essential oils; placing oil elsewhere will damage the humidifier.

1. Locate the oil tray at the back/bottom of the humidifier base.
2. Push to open and remove the tray.
3. Use a pre-installed essential oil pad (3 included).
4. Add 5-7 drops of essential oil to the pad.
5. Place the tray back and push to close. Scent activates when mist is on.

NOTE: Use only with included Homedics pads. Remove used pads when storing for long periods.

Essential Oils and Pets: Use caution. Keep oils and diffusers out of reach of pets. Diffuse in well-ventilated areas and allow pets to leave the room if needed. Observe pet reactions carefully. Discontinue use if irritation occurs. Seek medical attention if ingested.

How to Operate

• Power (⏻): Press to turn on/off.
• Mist Output (?): Press to cycle through levels 1-3. Use the 360° nozzle to direct mist. Do not point at walls or furniture.
• Night-Light/Display Lights (?): Press once for night-light. Second press keeps night-light on, turns off display. Third press turns off both. Fourth press turns on display lights.
• Programmable Humidistat (☁️): Default is 'CO' (continuous). Set 35%-55% humidity in 5% increments. Unit turns off at set level, on when humidity drops 5% below. Press until 'CO' to disable programming.
• Timer (⏱️): Press to cycle through 4, 8, 12 hours, or 0 (off). Ensure tank is full before using timer.
• Clean Reminder (?): Red LED indicates cleaning is needed. After cleaning, press and hold the reset button until the LED turns off.

Cleaning and Maintenance

CAUTION: Turn off and unplug before cleaning.

Cleaning the Transducer/Ultrasonic Membrane

Clean when the red indicator light is on to remove mineral deposits.

1. Remove tank cover and set aside.
2. Remove tank and pour out water.
3. Twist water reservoir to remove from tank base and pour out water.
4. Reattach water reservoir.
5. Fill tank with 13oz/385mL water.
6. Swish water in tank.
7. Empty water from reservoir.
8. Clean transducer/membrane with a 50/50 vinegar/water solution on a cotton swab. Wipe with a damp swab.
9. NEVER touch transducer/membrane with fingers.
10. NEVER submerge base in water or liquid.
11. After cleaning, reassemble, fill with water, plug in, and turn on.
12. Press and hold the clean indicator/reset button until the red LED turns off.

Cleaning the Tank

• Daily: Empty and rinse tank before refilling.
• Weekly: Use 50/50 vinegar/lukewarm water to remove scale/buildup.

Cleaning the Oil Tray

Open tray, remove pad. Change pads for different scents. Reuse pads for same scent. Wipe tray interior with a soft cloth. Replace pad and close tray.

NOTE: Remove oil pad when storing.

Cleaning the Surface

Wipe unit surface with a soft, damp cloth.

Storage

Before storing, clean tank, reservoir, float, and transducer/membrane with 50/50 vinegar/water. Rinse and dry completely. Clean oil tray with a soft cloth. After storage, rinse tank with water before use.

Troubleshooting

Specifications

• Ultrasonic Technology: Converts water into fine mist.
• Electrical Rating: 120VAC 60Hz 23W.
• Auto-Shutoff Protection: Unit shuts off automatically when the tank is empty; power button glows red.
• Capacity: 1.47 gallons (5.6 liters).
• Runtime: Up to 70 hours (on low mist setting). Varies with humidity, water temp, and mist setting.
• Room Size: 426 sq ft / 39.5 m² (based on AHAM HU-1-2016).
• Quiet Operation: 17-18 dBA.

Replacement Parts

Genuine Homedics replacement parts can be purchased from the retailer or at www.homedics.com (US) / www.homedics.ca (CAN).

• Water Tank: Model #: PP-UHECMTF91TNK (White), PPUHECMTF91PNTK (Platinum), PPUHECMTF91TPTK (Taupe)
• Outer Tank Cover: Model #: PP-UHECMTF91TKCV (White), PPUHECMTF91PNTC (Platinum), PPUHECMTF91TPTC (Taupe)
• Demineralization Cartridge: Model #: UHE-HDC
• Aroma Pads: Model #: UHE-PAD1

Warranty Information

Homedics offers a 2-Year Limited Warranty against defects in manufacture and workmanship under normal use. This warranty extends to consumers only and does not cover damage from misuse, accidents, unauthorized attachments, improper installation, or unauthorized repairs. For warranty service, contact Homedics Customer Relations.

For service in the USA: cservice@homedics.com, 1-800-466-3342 (8:30am-7:00pm EST Mon-Fri).

For service in Canada: cservice@homedicsgroup.ca, 1-888-225-7378 (8:30am-5:00pm EST Mon-Fri).

FCC Compliance

This device complies with Part 18 of the FCC Rules. Operation is subject to conditions preventing harmful interference and accepting any received interference.

This equipment has been tested and found to comply with Class B digital device limits per FCC Part 18 for reasonable protection against harmful interference in residential installations. If interference occurs, users are advised to reorient antennas, increase separation, or use a different circuit. Unauthorized modifications may void user authority.