Aprilaire 700M, 500M, 600A, 600M, 400A Annual Summer Shutdown, Periodic Preventative Maintenance

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ANNUAL SUMMER SHUTDOWN

For Models 400A, 400M, 500A, 500M, 600A and 600M close the bypass damper, which is a part of the humidifier, with the small damper handle.

Humidifier Control:

Automatic Digital Humidifier Control in Automatic Mode (see Figure A): No adjustment is necessary.

Automatic Digital Humidifier Control in Manual Mode (see Figure B): Set the knob to the “OFF” position.

Manual Humidifier Control (see Figure C): Set the knob to the “OFF” position.

PERIODIC PREVENTATIVE MAINTENANCE

NOTE: Periodic inspection and preventative maintenance of your total heating system is important for efficient and safe operation. Your heating contractor can service your humidifier at the same time he services the HVAC system.

All models have a distribution tray above the Water Panel, which should be inspected annually and cleaned of excess mineral deposits. Older models have a granular coating in the distribution tray. Do not scrape the granuals out of the tray. Newer models have a fabric liner in the distribution tray.

WATER LINE INSPECTION AND SERVICE INSTRUCTIONS

WATER

FEED TUBE

OUTLET

COMPRESSION

NUT

ORIFICE

SOLENOID

VALVE

INLET

IN-LINE

STRAINER

INLET

COMPRESSION

NUT

90-1053

1.Disconnect electrical power to the HVAC 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, Part No. 4004.

5.Reconnect the inlet water line. Double

Wrench to Prevent Leaking.

6.Disconnect the water feed tube at the outlet compression nut.

7.Inspect the water 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.Inspect the orifice in the water feed tube and make sure the small opening is unplugged.

9.Reconnect the water feed tube. Double Wrench to Prevent Leaking.

10.Remove the drain line from the bottom of the humidifier. If applicable, flex it to loosen any mineral deposits or blockages. Flush the drain line with water under pressure to clear it of any debris, and slip it back onto the drain fitting. If drain line does not flow properly, replace it. Inspect the drain line to make sure it has a constant downward slope and is not flattened or blocked.

11.Turn on water supply and reconnect electrical power to the HVAC.

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Contents Humidifiers Table of Contents IntroductionPrinciple of Operation Automatic Digital Humidifier Control Indicatorlights Automatic ModeManual Mode Water Panel Change IndicatorTEST/RESET Additional InformationOperating Instructions Check the Humidifier OperationAutomatic Digital Humidifier Control Not Operate Manual Humidifier ControlEffect of Water Characteristics Annual MaintenanceControl in Test Mode or Humidifier will not Operate Additional Informationfor ALL ModelsAnnual Summer Shutdown Periodic Preventative MaintenanceWater Line Inspection and Service Instructions Series Model Limited Warranty Warranty Registration
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700A, 500A, 600A, 500M, 700M specifications

Aprilaire is a leading brand in the field of indoor air quality, and its series of humidifiers like the 600A, 700M, 400A, 500A, and 600M have been designed for optimal performance and user convenience. These humidifiers are engineered to maintain ideal moisture levels in your home, which is especially important during dry winter months.

The Aprilaire 600A is an advanced model equipped with automatic humidity control. This feature enables the humidifier to adjust moisture levels based on the outdoor temperature, ensuring a comfortable indoor environment throughout the changing seasons. The 600A is also easy to install and integrates seamlessly with your home’s HVAC system, supplying humidity throughout the entire house.

In contrast, the 700M is a manual humidifier option that offers flexibility in controlling humidity levels. This model is particularly suitable for homeowners who prefer a hands-on approach. The 700M can deliver up to 0.75 gallons of moisture per hour, making it effective for larger homes or spaces where humidity needs to be closely monitored.

The Aprilaire 400A and 500A models are geared towards versatility and space efficiency. The 400A, designed for homes with lower humidity requirements, operates quietly and offers a less invasive installation. It is suitable for areas up to 4,000 square feet, making it ideal for many average-sized homes. The 500A, on the other hand, is particularly designed for homes with a higher demand for moisture, providing consistent humidity control for larger spaces.

The Aprilaire 600M is another manual option that combines a straightforward user interface with robust performance. Similar to the 700M, it allows users to manually adjust humidity levels but features a slightly superior output rate.

One of the standout characteristics shared among these models is their ability to minimize the effects of dry air. By maintaining the right humidity levels, these humidifiers help reduce the likelihood of respiratory issues, dry skin, and static electricity, along with protecting wooden furniture and flooring from damage.

Overall, the selection of Aprilaire humidifiers offers something for every homeowner, from automated models that take the guesswork out of humidity control to manual options that provide a personal touch. Each model boasts its unique features while ensuring a healthier and more comfortable living environment year-round.
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