Inspection and Service Instructions

IN-LINE STRAINER

OUTLET COMPRESSION NUT

ORIFICE

SOLENOID

VALVE

INLET

INLET COMPRESSION NUT

1.Disconnect electrical power to the furnace and shut off water supply.

2.Disconnect the water line at the inlet compression nut.

3.Remove the in-line strainer from inside the inlet side of the valve by using a small nail or wire.

4.Flush the in-line strainer clean or replace with a new strainer, Service Department, Part No. 4004.

5.Replace the in-line strainer and reconnect the inlet water line (Double Wrench To Prevent Leaking).

6.Disconnect the water line at the outlet compression nut.

7.Remove the orifice from the copper or plastic tube and make sure this small opening is unplugged.

8.Replace the orifice and reconnect the outlet water line (Double Wrench To Prevent Leaking).

9.Turn on water supply and reconnect electrical power to the furnace.

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Aprilaire 448 owner manual Inspection and Service Instructions

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.