4 Maintenance

4.1 Standard Air Filter

The DHV-150H is equipped with a pleated cloth air filter. This filter should be checked semi-annually. Operating the unit with a dirty filter will reduce dehumidifier capacity and efficiency and may cause the compressor to cycle off and on unnecessarily on the defrost control.

To access the air filter, remove the filter access panel from the end of the DHV-150H by unscrewing the two thumbscrews and sliding the panel to the left until it is free from underneath the side panel. The filter(s) should be readily visible and can be removed by pulling them straight out of the DHV-150H.

The pleated cloth filter can generally be vacuumed clean several times before needing replacement. Replacement filters can be ordered from the factory or purchased locally if available. DO NOT operate the unit without the standard filter or with a less effective filter than the standard filter. The heat exchange coils inside the unit could become clogged and require disassembly to clean.

4.2 High Efficiency Air Filter

An optional high efficiency pleated microglass paper filter is available for the DHV-150H. This filter is rated as 90%-95% efficient by the ASHRAE Dust Spot test method 52-76. The high efficiency pleated microglass paper filter should be used in conjunction with the standard filter, and placed directly behind the standard filter.

This filter is able to remove allergy-causing particles from the airstream. Check the high efficiency air filter every two years and replace if necessary. The high efficiency filter has a much larger surface area than the standard filter, thus the standard filter may need to be cleaned or replaced several times before the high efficiency filter requires replacement. Be careful not to damage the fabric media when handling the high efficiency pleated paper filter. Do not attempt to clean the high efficiency pleated paper filter. It should be replaced when it becomes restrictive (See Figure 7).

4.3 Optional Fresh Air Return

Check and clean the screen on the outdoor fresh air return seasonally. The screen may become plugged during the seasons when there are many particles in the outdoor air.

5 Service

CAUTION: Servicing the DHV-150H with its high pressure refrigerant system and high voltage circuitry presents a health hazard which could result in death, serious bodily injury, and/or property damage. Only qualified service people should service this unit.

5.1 Warranty Notice

Warranty terms are provided at the end of this manual. Please read the terms before any repair is initiated. If a warranty repair is required, call the factory first at 1- 800-255-7749 for warranty claim authorization and technical assistance.

5.2 Technical Description

The DHV-150H uses a refrigeration system similar to an air conditioner's to remove heat and moisture from incoming air, and add heat to the air that is discharged (See Figure 3).

Figure 3: Refrigeration System of DHV-150H

Hot, high-pressure refrigerant gas is routed from the compressor to the condenser coil (See Figure 3). The refrigerant is cooled and condensed by giving up its heat to the air that is about to be discharged from the unit. The refrigerant liquid then passes through a filter/drier and capillary tubing, which causes the refrigerant pressure and temperature to drop. It next enters the evaporator coil where it absorbs heat from the incoming air and evaporates. The evaporator operates in a flooded condition, which means that all the evaporator tubes contain liquid refrigerant during normal operation. A flooded evaporator should

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American Aldes DHV-150H Standard Air Filter, Optional Fresh Air Return, Warranty Notice, Technical Description
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DHV-150H specifications

The American Aldes DHV-150H is an advanced ventilation unit designed to optimize indoor air quality in residential and commercial spaces. Known for its efficiency and reliability, the DHV-150H incorporates cutting-edge technologies to ensure that both air exchange and energy conservation are maximized.

One of the standout features of the DHV-150H is its high airflow capacity. It can effectively manage ventilation requirements for spaces up to 1,500 square feet, making it an ideal solution for medium to large residences and commercial buildings. The unit boasts a robust airflow rate of 150 CFM (cubic feet per minute), enabling swift air exchange and preventing the accumulation of indoor pollutants.

Energy efficiency is a hallmark of the DHV-150H, which is equipped with an advanced heat recovery ventilator (HRV) system. This technology allows the unit to recover and transfer heat from the outgoing stale air to the incoming fresh air. As a result, the DHV-150H can significantly reduce heating costs in winter, while still maintaining a comfortable indoor environment.

In terms of construction, the DHV-150H features a durable housing made from high-quality materials that ensure longevity and resistance to corrosion. Its compact design allows for flexible installation options, whether mounted on a wall or in a ceiling, seamlessly integrating into any architectural space.

The DHV-150H also prioritizes user experience and control. With a user-friendly interface, it allows homeowners and facility managers to easily adjust settings and monitor performance in real-time. This adaptability is further enhanced by compatibility with smart home systems, enabling remote control via smartphone applications or smart home networks.

Noise reduction is another key characteristic of the DHV-150H. The unit operates at a low sound level, ensuring that it does not disrupt the tranquility of living or working environments. This is particularly important for settings such as bedrooms, offices, and healthcare facilities where a peaceful atmosphere is essential.

In summary, the American Aldes DHV-150H represents a perfect blend of efficiency, technology, and user-centric design. Its high airflow capacity, energy recovery capabilities, robust construction, and smart integration make it a top choice for those seeking reliable and effective ventilation solutions. Whether for enhancing home comfort or improving commercial air quality, the DHV-150H continues to set standards in the HVAC industry.
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