Aprilaire 448 owner manual Maintenance Instructions For Models Reservoir Pump Sections

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MAINTENANCE INSTRUCTIONS

FOR MODELS 448

RESERVOIR PUMP SECTIONS

WARNING! 120 volts may cause serious injury from electrical shock. Disconnect power and shut off water supply before servicing.

IMPORTANT: Clean and refill reservoir, hose, pump and float every 30 days during heating season.

1. Pump Impellor Cap

2.Cap Sides

3.Impellor

4.Cap Flow Control Opening

5.Float

3

6. Arm Mechanism

2

2

5

 

4

16

A.TO CLEAN RESERVOIR

1.Hold bottom of reservoir (IT IS FILLED WITH WATER) and loosen retainer knob.Carefully lower reservoir, disengaging from metal frame.

2.Empty water, remove partition and reservoir liner.

3.Clean or replace reservoir liner. Reinstall partition in liner. To replace reservoir, hook back of reservoir over lip of dark metal frame and tighten knob.

B.TO CLEAN HOSE

1.Disconnect hose from pump and pull hose up through hole.

2.Flex hose to loosen scale and flush clean with a stream of water.

3.Clean nozzle at the same time.

C.TO CLEAN PUMP

1.Remove pump impellor cap (1) by pushing down on projecting sides (2).

2.Clean scale from inside of cover and impellor (3) with dull blade.

3.Clean flow control (4) in pump outlet with 5/32” bit.

4.Snap pump impellor cap (1) back in place.

5.Pull water hose down through hole, connect to pump, and attach nozzle into water distribution pan.

D.TO CLEAN FLOAT

1.Clean scale off float (5) and arm mechanism (6) with dull blade.

2.Work arm mechanism (6) up and down to dislodge any scale buildup.

E.TO OIL MOTOR

1.Disconnect water line at valve inlet and swing line free. Disconnect the humidi- stat leads.

2.Remove the three screws from the brown motor cover and remove.

3.Use two drops SAE 20 oil in the yellow hole on top and inside the yellow mark on the side of the motor.

F.TO REASSEMBLE

1.Replace motor cover.

2.To reinstall reservoir, hook back of reservoir over lip of dark brown metal frame and tighten knob.

3.Reconnect water at valve inlet.

4.To reinstall top cover, hook back under lip of dark brown metal frame and tighten two knobs.

5.Reconnect humidistat or control leads and electrical power.

6.Turn on water supply and fill reservoir in the fall.

7.Check unit operation.

8.Check system operation:

Humidifier Control: Automatic Check system operation by setting the knob to “Test.” With furnace blower operating and furnace calling for heat, humidifier will operate for one minute.

9. Set humidistat or Control to its original position.

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Contents Automatic Humidifier Introduction Principle of Operation Page Operation Guide Automatic Mode Manual Mode-see pgFigure a % Relative Humidity Guide Outdoor Temperature ºF Setting DialFigure B III. Effect of Water Characteristics IV. Annual Maintenance Inspection and Service Instructions For ModelMaintenance Instructions For Models Reservoir Pump Sections Models Model Model Limited Warranty Aprilaire Fresh Air Exchangers Electronic Thermostats Aprilaire Zone Control SystemsService and Water Panel Replacement Record DP #10005406

448 specifications

The Aprilaire 448 is a state-of-the-art humidifier that plays a significant role in maintaining optimal indoor air quality. Designed specifically for homes, this unit effectively combats dryness, ensuring that the air within your living space remains comfortable and healthy, especially during the colder months.

One of the standout features of the Aprilaire 448 is its robust capacity to cover areas up to 4,000 square feet. This means that even larger homes can benefit from improved humidity levels, protecting not just your comfort but also your furnishings and overall air quality. By maintaining an ideal humidity level between 30% and 50%, the Aprilaire 448 fosters an environment that reduces the risk of respiratory issues, allergies, and dry skin.

The unit incorporates advanced technology to facilitate easy operation and maintenance. Equipped with a digital control, it allows homeowners to set and monitor humidity levels effortlessly. The digital display provides crucial data on current humidity levels, enabling users to make informed adjustments. Additionally, the unit features a built-in humidistat that automatically regulates the humidity based on the settings, ensuring a consistent and comfortable atmosphere.

Energy efficiency is another hallmark of the Aprilaire 448. The unit is designed to function quietly, avoiding disruptions in your daily life, while using minimal energy compared to traditional humidifiers. The water-saving design ensures that it operates effectively without excessive water consumption, making it an eco-friendly choice for conscientious homeowners.

The Aprilaire 448 also boasts a self-cleaning feature that reduces maintenance time and effort. This innovation helps to keep the unit free from mineral buildup, which is a common problem in humidifiers, thereby prolonging its lifespan and reliability. Furthermore, the easy-to-replace water panel ensures that users can maintain their humidifier with minimal hassle.

In summary, the Aprilaire 448 is a powerful and efficient solution for maintaining ideal humidity levels in larger spaces. With its advanced digital controls, energy-efficient operation, and low-maintenance design, it has become a preferred choice for homeowners seeking to enhance their indoor air quality. Whether combating the winter chill or addressing dryness during any season, the Aprilaire 448 delivers comfort and health benefits all year round. Its commitment to reliability and performance makes it a wise investment for any household.