Model | Aprilaire 400M, 600 manual

600 SERIES

REQUIRED MAINTENANCE INSTRUCTIONS

(APRILAIRE HUMIDIFIER MODELS 500, 500M, 600 & 600M)

CAUTION

Sudden operation may cause personal injury or property damage. Turn Humidifier Control to “OFF” or lowest setting before servicing.

REQUIRED MAINTENANCE INSTRUCTIONS

(APRILAIRE HUMIDIFIER MODELS 700 & 700M)

WARNING

ELECTRICAL SHOCK HAZARD. Can cause injury or death. Disconnect all electrical power supplies before servicing. Turn Humidifier Control to “OFF” or lowest setting before servicing.

SERIES

MODEL 500 &

1.Front Cover

2.Feed Tube

3. Integral Bypass Damper	1

4. Water Panel

Evaporative Assembly

5. Distribution Tray

6. “V” Notches

7. Water Panel Evaporator

8. Scale Control Insert

9. Drain Line

8 6

90-1076

1.Humidifier Cover Assembly

2. Base Assembly

3. Water Panel

Evaporative Assembly

4. Distribution Tray

5. ”V” Notches

6. Water Panel Evaporator

7. Scale Control Insert

8. Drain Line

9. Power Cord

90-1075

MODEL 700

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

2.Turn off water supply. Turn the integral bypass damper (3) to the SUMMER position.

3.Press the tabs in the latches on the top and bottom of front cover (1) and pull cover off base with both hands. Set aside.

4.Carefully pull the plastic feed tube (2) out of the distribution tray (5) at the top of the Water Panel evaporative assembly (4). Pull this assembly out by grasping at top and tipping out.

5.Unsnap the distribution tray (5) from the scale control insert (8). 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.

6.Slide the Water Panel evaporator (7) out from the scale control insert (8) and dispose of the Water Panel. Clean the scale control insert of mineral deposits. Replace the Water Panel evaporator (Stock No. 35 for Models 600 & 600M and Stock No. 10 for Models 500 & 500M) 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 (5) back into place.

7.Inspect the plastic feed tube (2) by gently flexing it and looking for cracks or signs of wear. Replace tube if it is cracked, brittle, or has been damaged.

8.Reinstall the Water Panel evaporative assembly (4) into the humidifierby fitting its drain into the round receptacle at the base of the humidifier. Push the assembly in at the top until it snaps into place. Push the end of the feed tube back firmly into the distribution tray and replace the front cover.

9.Remove the drain line (9) from the bottom of the humidifier. If applicable,flex it to loosen any mineral deposits or blockage. Then flush it with water under pressure. If it does not properly clear, replace it. Slip drain line back onto the drain fitting. Make sure the drain line has a constant downward slope and is not flattened or blocked.

10.Turn on the water supply. Return integral bypass damper to appropriate position.

11.Check system operation:

Manual Humidifier Control (Models 500M & 600M): With the HVAC blower operating,turn up Humidifier Control and check system operation.

Digital Humidifier Control (Models 500 & 600): (Automatic or Manual mode) Check system operation and reset Change Water Panel indicatorby setting the knob to “Test/Reset”. With HVAC blower operating and HVAC calling for heat, humidifier will operate for one minute. DO NOT LEAVE IN TEST MODE AS HUMIDIFIER WILL NOT OPERATE.

12.Set Humidifier Control to its original position.

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 evaporative assembly (3) by grasping at the top and tipping out.

5.Unsnapthe distributiontray(4)fromthe scale control insert (7).Lightlyscrapeoutor brushoffany mineral deposits, being careful not to stretch or loosen the synthetic fabricliner. Soakingthe tray in vinegar or a lime-removing agent is helpful when trying to removestubborn mineral deposits.

6.Slide the Water Panel evaporator (6) out from the scale control insert (7) and dispose of the Water Panel. Clean the scale control insert of mineral deposits. Replace the Water Panel evaporator (Stock No. 35) 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.Inspect the plastic feed tube by gently flexing it and looking for cracks or signs of wear. Replace tube if it is cracked, brittle, or has been damaged.

8.Reinstall the Water Panel evaporative assembly (3) into the humidifier by fitting its drain into the round receptacle at the base of the humidifier. Push the assembly in at the top between the retaining ribs that hold the assembly in place in a vertical position.

9.Remove the drain line (8) from the bottom of the humidifier. If applicable, flex it to loosen any mineral deposits or blockage. Then flush it with water under pressure. If it does not clear, replace it. Slip drain line back onto the drain fitting. Make sure the drain line has a constant downward slope and is not flattened or blocked.

10.Reinstall 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:

Manual Humidifier Control (Model 700M): With the HVAC blower operating, turn up Humidifier Control and check system operation.

Digital HumidifierControl (Model 700): (Automatic or Manual mode) Check system operation and reset Change Water Panel indicator by setting the knob to “Test/Reset”. With HVAC blower operating and HVAC 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.

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400, 600, 400M 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.