MAINTENANCE INSTRUCTIONS FOR

APRILAIRE HUMIDIFIER MODEL 700

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

 

 

 

5

1. Front Cover Assembly

 

3

2

 

4

2. Base

 

 

1

 

6

3. Water Panel

 

Evaporator Assembly

 

 

7

4. Distribution Tray

 

 

 

 

 

5.”V” Notches

6.Water Panel

7.Scale Control Insert

8.Drain Hose

9.Power Cord

8

9

1.Note Humidifier Control setting and turn dial to the “OFF” position.

2.Disconnect electrical power and turn off water supply.

3.Unlatch humidifier front cover assembly (1) from base assembly (2) at the bottom of the cover, lift, and set aside.

4.Pull out the water panel evaporator assembly (3) by grasping at the top and tipping out.

5.Unsnap the distribution tray (4) from the scale control insert (7). Follow the instructions below depending upon the type of distribution tray in your humidifier:

For trays with a synthetic fabric liner: Lightly scrape out or brush off any mineral deposits, being careful not to stretch or loosen the synthetic fabric liner. Soaking the tray in vinegar or a lime-removing agent is helpful when trying to remove stubborn mineral deposits.

For trays with granular coating: Do not scrape off the granular coating, but lightly scrape out any mineral deposits and clean the “V” notches (5). This textured surface helps ensure even water flow for maximum performance. See page 3 if removed.

6.Slide the Water Panel evaporator (6) out from the Scale Control Insert (7). Clean the Scale Control Insert by twisting and flexing it to loosen the calcium deposits. Replace the Water Panel evaporator (Stock No. 35) and with a new Genuine Aprilaire Water Panel. Slide the Water Panel evaporator back into the scale control insert with the colored spot up and snap the distribution tray (4) back into place.

7.Check the condition of the feed tube and replace if tube is damaged or brittle.

8.Re-install the Water Panel evaporator assembly (3) into the base assembly (2). Push it in at the top between the retaining ribs that hold the assembly in place in a vertical position.

9.Remove the drain hose (8) from the bottom of the unit. Bend and flex it to loosen the internal calcium deposits. Then flush it with water under pressure and slip it back onto the drain fitting.

10.Re-install front cover assembly (1) by hooking at the top of the base assembly (2) and latching at the bottom.

11.Reconnect electrical power (9) and turn on the water supply.

12.Check system operation:

Humidifier Control: (Automatic or Manual) Check system operation and reset change water panel indicator by setting the knob to “Test/Reset”. With furnace blower operating and furnace calling for heat, humidifier will operate for one minute. DO NOT LEAVE IN TEST MODE AS HUMIDIFIER WILL NOT OPERATE.

13.Set Humidifier Control to its original position.

NOTE: The motor is permanently lubricated and does not need to be oiled.

MODEL 700

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Aprilaire 400 owner manual Base Water Panel
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400 specifications

The Aprilaire 400 is a high-performance whole-home humidifier designed to enhance indoor air quality and provide superior comfort throughout your living spaces. As part of the Aprilaire family, known for their commitment to creating healthier environments, this model stands out due to its innovative features and advanced technologies.

One of the main characteristics of the Aprilaire 400 is its capacity to humidify homes effectively, covering an area of up to 4,000 square feet. This makes it ideal for large living spaces, ensuring that every room benefits from balanced humidity levels. The humidifier operates seamlessly with the home’s existing heating and cooling systems, requiring no additional maintenance, making it a hassle-free solution for homeowners.

A prominent feature of the Aprilaire 400 is its self-regulating technology. This unit uses a built-in humidistat that senses the moisture levels in your home and adjusts the humidification output accordingly. This ensures optimal humidity—typically between 30% and 50%—which can help reduce issues related to dry air, such as dry skin, irritated sinuses, and static electricity.

Another key benefit of the Aprilaire 400 is its evaporative design, which utilizes a water panel rather than a traditional water tank. This allows for efficient moisture dispersion, as the humidifier draws in dry air, passes it through the water panel, and releases it back into the living space as humidified air. The water panel is replaceable and designed for annual maintenance, promoting long-term functionality and hygiene.

The Aprilaire 400 also incorporates a simple installation process. With compatibility for various heating systems, including forced air and hydronic, it can be integrated into most homes without significant modifications. Its compact design is another advantage, ensuring it can fit unobtrusively in your home, maintaining the aesthetic of your space.

Overall, the Aprilaire 400 whole-home humidifier is a reliable solution for maintaining optimal humidity levels, fostering a healthier living environment, and enhancing overall comfort. With its advanced features, ease of use, and efficient operation, this humidifier is a smart investment for any homeowner aiming to improve indoor air quality and promote well-being.
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