Honeywell Humidifier HEV312 SERIES Manual

The Honeywell Humidifier HEV312 SERIES is a high-efficiency evaporative humidifier designed for medium to large rooms, featuring a large-capacity water tank, adjustable humidity control, quiet operation, wick filter system, automatic shut-off, easy-fill design, and low water indicator. Powered by standard household outlet. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting to Power 7. Operation 8. Maintenance 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Water Tank, Wick Filter, Humidistat Control, Power Cord, Air Outlet, Water Fill Opening, Low Water Indicator Light.

Feature	Description
Large-Capacity Water Tank	Holds up to 1.5 gallons for extended operation
Adjustable Humidistat	Manual dial to set desired humidity level
Wick Filter System	Evaporative wick for efficient moisture output
Quiet Operation	Designed for minimal noise during use
Automatic Shut-Off	Turns off when tank is empty or removed
Easy-Fill Design	Wide opening for convenient refilling
Low Water Indicator	LED light alerts when water is low
Carry Handle	Integrated handle for easy transport
Power Indicator Light	Shows when unit is powered on
Air Outlet Grille	Directs moisturized air into room

Installation

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

Remove all packaging materials from humidifier and components.
Install wick filter: Remove from packaging and insert into base slot until secure.
Fill water tank: Remove tank, fill with clean, cool tap water, replace securely.
Position unit: Place on floor or sturdy table in center of room for best airflow.

WARNING! Do not place on carpet or near heat sources. Ensure unit is upright before filling.

First-Time Setup

Prepare humidifier for initial use.

Soak wick filter: Submerge new wick in water for 15-20 minutes before first use.
Fill tank: Fill with clean water to MAX line; avoid overfilling.
Place tank: Set tank onto base, ensuring proper alignment.
Plug in: Connect power cord to standard 120V outlet.
Set humidity: Turn humidistat dial to desired setting (recommended 40-60%).

CAUTION! Use only clean, cool tap water. Do not use hot water or additives.

Specifications

Model Series: HEV312.
Coverage Area: Up to 500 square feet.
Water Tank Capacity: 1.5 gallons (5.7 liters).
Output: Up to 1.2 gallons per day.
Humidistat: Adjustable dial control.
Power: 120V AC, 60Hz, 30W.
Noise Level: < 40 dB on low setting.
Dimensions: 12.5" H x 10.5" W x 10.5" D.
Weight (empty): 5.5 lbs.
Wick Filter Type: Replaceable evaporative wick.

Controls and Settings

Front Panel: Power Indicator Light, Low Water Indicator Light, Humidistat Control Dial.

Operation: Plug in to activate; indicator light shows power. Turn humidistat dial clockwise to increase humidity, counterclockwise to decrease. Low water light illuminates when tank needs refilling.

Settings: Humidistat ranges from LOW (30%) to HIGH (70%). Automatic shut-off activates when tank is empty or improperly seated. No remote control included.

Connecting to Power

Use included power cord with standard outlet.

Ensure humidifier is off (dial at OFF position).
Plug power cord into rear of unit securely.
Connect other end to 120V AC wall outlet.
Power indicator light will illuminate when dial is turned from OFF.

Tip: Use a dedicated outlet; avoid extension cords. Unplug when not in use for extended periods.

Operation

Daily use instructions.

Fill tank daily: Remove, fill with clean water, replace.
Set humidity: Adjust dial to comfort level (40-60% recommended).
Monitor indicator: Refill when low water light comes on.
Automatic operation: Unit runs until desired humidity is reached or tank empties.
Shut down: Turn dial to OFF, unplug when not in use.

WARNING! Never operate without water or with empty tank. Do not block air inlet or outlet.

Maintenance

Regular maintenance ensures optimal performance.

Daily: Refill with fresh water; check wick for saturation.
Weekly: Clean tank and base with mild soap and water; rinse thoroughly.
Monthly: Replace wick filter (or as needed depending on water hardness).
Seasonal: Deep clean before storage; ensure completely dry.

Note: Use only genuine Honeywell replacement wicks (Part # HEV312WICK).

Care & Cleaning

Unplug before cleaning. Use soft cloth and mild detergent; never immerse in water.

Empty tank and base completely.
Clean with solution of vinegar and water (1:1) to remove mineral deposits.
Air dry completely before reassembly.
Store in cool, dry place when not in use.

CAUTION! Do not use abrasive cleaners, bleach, or harsh chemicals. Never spray directly with water.

Regulatory Information

UL Listed: Meets safety standards for household humidifiers. FCC Part 15: Class B digital device compliant. Copyright © Honeywell International Inc. For support, visit www.honeywellhumidifiers.com or contact 1-800-332-1110. Made in China. Dispose of according to local electronic waste regulations.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No mist/output	Empty tank/dry wick	Fill tank with water; ensure wick is soaked and properly installed.
Low water light on	Tank empty/misaligned	Refill tank; reseat properly on base.
Unit not powering on	No power/loose plug	Check outlet; ensure plug is fully inserted; try different outlet.
Weak humidity output	Clogged wick/mineral buildup	Replace wick filter; clean tank and base with vinegar solution.
Unusual noise	Loose parts/fan obstruction	Ensure tank is secure; check for debris in fan area; contact support.
Water leakage	Overfilled/cracked tank	Do not fill above MAX line; inspect tank for damage; replace if cracked.

Reset: Unplug for 5 minutes, then restart.

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